/* Excelerate LMS — design system v2 (docs/design-system.md).
   One stylesheet for learner, client and admin surfaces. Phone-first; light + dark; reduced-motion aware.
   Layers: tokens → base → primitives (buttons, forms, surfaces, data) → chrome (topbar, tabbar, sidebar) → patterns. */

@font-face { font-family: "Montserrat"; font-style: normal; font-weight: 400 800; font-display: swap; src: url("/fonts/montserrat-normal-latin.woff2") format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Montserrat"; font-style: normal; font-weight: 400 800; font-display: swap; src: url("/fonts/montserrat-normal-latin-ext.woff2") format("woff2"); unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF; }

/* ───────── tokens ───────── */
:root {
  /* brand: magenta ramp. --brand is the accent for text, icons, borders (≥ 4.5:1 on every surface of its theme);
     --brand-fill is the solid fill under white text (5.6:1) — the same in both themes. */
  --m-50: #fdf0fd; --m-100: #fae3fa; --m-200: #f2bff2; --m-300: #e68ae6; --m-400: #da4dda; --m-500: #cc00cc; --m-600: #b000b0; --m-700: #8a008a; --m-800: #660066; --m-900: #3d003d;
  --brand: #660066;
  --brand-fill: #cc00cc;
  --brand-fill-hover: #b000b0;
  --brand-strong: #4d004d;
  --brand-bright: #ff47ff;
  --brand-soft: var(--m-100);
  --brand-softer: var(--m-50);
  --brand-ink: var(--m-900);
  --pink: #cc0052;
  --orange: #4600cc;
  --grad: linear-gradient(90deg, #cc0052 0%, #cc00cc 50%, #4600cc 100%);
  --grad-text: linear-gradient(90deg, #ff47ff 0%, #ff47ff 100%);
  --grad-deep: radial-gradient(900px 480px at 100% 0%, rgba(102, 0, 102, .55), transparent 62%), radial-gradient(700px 420px at 0% 110%, rgba(204, 0, 204, .18), transparent 60%), linear-gradient(160deg, #221f22 0%, #1c1a1c 60%, #161416 100%);
  --night: #1c1a1c;
  /* accent (brand book: yellow for highlights and CTAs, ~5%); red/blue only inside gradients */
  --accent: #fff800; --accent-ink: #1c1a1c;
  --b-red: #cc0052; --b-blue: #4600cc; --b-magenta: #cc00cc; --b-plum: #660066; --b-grey: #c4c4c4;

  /* neutrals — a whisper of plum keeps them warm */
  --bg: #f0f0f0;
  --bg-elev: #ffffff;
  --bg-elev-2: #ffffff;
  --bg-sunken: #e8e6e8;
  --bg-hover: #ebe9eb;
  --bg-active: #e2dfe2;
  --ink: #1c1a1c;
  --ink-2: #3f3b3f;
  --ink-3: #5c575c;   /* ≥ 4.9:1 on page, card and sunken surfaces */
  --ink-4: #8a858a;   /* decorative only (never text) */
  --line: #dcd9dc;
  --track: #e2dfe2;
  --line-strong: #c4c4c4;
  --scrim: rgba(14, 5, 16, .55);

  /* semantic: --x for fills/icons, --x-ink for text on --x-soft or the page */
  --ok: #0f9d6b;   --ok-ink: #0a6e4c;   --ok-soft: #e3f6ee; --ok-fill: #08805a;
  --warn: #c77700; --warn-ink: #8a5200; --warn-soft: #fff3df;
  --bad: #d12c4c;  --bad-ink: #b3213f;  --bad-soft: #fde8ec; --bad-fill: #c8243f;
  --info: #2f6fde; --info-ink: #2459b8; --info-soft: #e7effd;

  /* type — Montserrat throughout (brand book primary typography); Verdana is the brand-approved web-safe fallback */
  --font: "Montserrat", Verdana, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-display: "Montserrat", Verdana, ui-sans-serif, system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --fs-2xs: .7rem; --fs-xs: .78rem; --fs-sm: .875rem; --fs-base: 1rem; --fs-md: 1.0625rem; --fs-lg: 1.2rem;
  --fs-xl: clamp(1.3rem, 1.15rem + .6vw, 1.6rem);
  --fs-2xl: clamp(1.6rem, 1.25rem + 1.5vw, 2.35rem);
  --fs-3xl: clamp(2rem, 1.4rem + 2.6vw, 3.25rem);

  /* spacing — 4 px rhythm */
  --sp-1: .25rem; --sp-2: .5rem; --sp-3: .75rem; --sp-4: 1rem; --sp-5: 1.25rem; --sp-6: 1.5rem; --sp-7: 2rem; --sp-8: 3rem;

  /* shape */
  --radius-xs: 6px;
  --radius-s: 10px;
  --radius: 14px;
  --radius-l: 22px;
  --radius-xl: 28px;
  --radius-pill: 999px;

  /* elevation — layered, plum-tinted */
  --shadow-xs: 0 1px 1px rgba(28, 10, 31, .04);
  --shadow-s: 0 1px 2px rgba(28, 10, 31, .06), 0 1px 1px rgba(28, 10, 31, .03);
  --shadow: 0 1px 2px rgba(28, 10, 31, .05), 0 6px 16px -6px rgba(28, 10, 31, .1), 0 16px 32px -16px rgba(28, 10, 31, .12);
  --shadow-l: 0 2px 6px rgba(28, 10, 31, .06), 0 16px 40px -12px rgba(28, 10, 31, .2), 0 40px 80px -32px rgba(28, 10, 31, .22);
  --shadow-brand: 0 8px 22px -10px rgba(204, 0, 204, .6);
  --highlight: inset 0 1px 0 rgba(255, 255, 255, .0);

  /* focus */
  --focus: #cc00cc;
  --ring: 0 0 0 3px rgba(204, 0, 204, .28);

  /* motion */
  --ease: cubic-bezier(.2, .8, .2, 1);
  --ease-in-out: cubic-bezier(.65, 0, .35, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --dur-1: 120ms; --dur-2: 200ms; --dur-3: 360ms; --dur-4: 600ms;

  /* layout */
  --topbar-h: 64px;
  --sidebar-w: 264px;
  --outline-w: 320px;
  --content-max: 1180px;
  --read-max: 760px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --brand: #ff47ff; --brand-soft: #3a0a3a; --brand-softer: #2a0b2a; --brand-ink: #ffc2ff; --brand-strong: #ff8cff;
    --bg: #1c1a1c; --bg-elev: #262326; --bg-elev-2: #2e2a2e; --bg-sunken: #161416; --bg-hover: #302c30; --bg-active: #383338;
    --ink: #f0f0f0; --ink-2: #d6d2d6; --ink-3: #b3aeb3; --ink-4: #7a757a; --line: #353135; --line-strong: #4a454a; --track: #3a353a; --scrim: rgba(0, 0, 0, .65);
    --ok: #2fbf86; --ok-ink: #4fd4a0; --ok-soft: #0e2a20;
    --warn: #e39a2b; --warn-ink: #f5b14a; --warn-soft: #2e2210;
    --bad: #f0506d; --bad-ink: #ff8196; --bad-soft: #2f1219;
    --info: #5b8ff0; --info-ink: #8db4ff; --info-soft: #111f38;
    --shadow-xs: 0 1px 1px rgba(0, 0, 0, .3); --shadow-s: 0 1px 2px rgba(0, 0, 0, .45); --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 28px -10px rgba(0, 0, 0, .65); --shadow-l: 0 2px 8px rgba(0, 0, 0, .45), 0 30px 70px -20px rgba(0, 0, 0, .8);
    --highlight: inset 0 1px 0 rgba(255, 255, 255, .04);
    --focus: #ff47ff; --ring: 0 0 0 3px rgba(255, 71, 255, .32);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --brand: #ff47ff; --brand-soft: #3a0a3a; --brand-softer: #2a0b2a; --brand-ink: #ffc2ff; --brand-strong: #ff8cff;
  --bg: #1c1a1c; --bg-elev: #262326; --bg-elev-2: #2e2a2e; --bg-sunken: #161416; --bg-hover: #302c30; --bg-active: #383338;
  --ink: #f0f0f0; --ink-2: #d6d2d6; --ink-3: #b3aeb3; --ink-4: #7a757a; --line: #353135; --line-strong: #4a454a; --track: #3a353a; --scrim: rgba(0, 0, 0, .65);
  --ok: #2fbf86; --ok-ink: #4fd4a0; --ok-soft: #0e2a20;
  --warn: #e39a2b; --warn-ink: #f5b14a; --warn-soft: #2e2210;
  --bad: #f0506d; --bad-ink: #ff8196; --bad-soft: #2f1219;
  --info: #5b8ff0; --info-ink: #8db4ff; --info-soft: #111f38;
  --shadow-xs: 0 1px 1px rgba(0, 0, 0, .3); --shadow-s: 0 1px 2px rgba(0, 0, 0, .45); --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 28px -10px rgba(0, 0, 0, .65); --shadow-l: 0 2px 8px rgba(0, 0, 0, .45), 0 30px 70px -20px rgba(0, 0, 0, .8);
  --highlight: inset 0 1px 0 rgba(255, 255, 255, .04);
  --focus: #ff47ff; --ring: 0 0 0 3px rgba(255, 71, 255, .32);
  color-scheme: dark;
}

/* ───────── base ───────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--font); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; min-height: 100dvh; font-feature-settings: "kern"; }
img, video, svg, iframe { max-width: 100%; }
img { height: auto; }
a { color: var(--brand); text-decoration: none; text-underline-offset: 3px; text-decoration-thickness: from-font; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; letter-spacing: -.012em; margin: 0 0 .5em; font-weight: 700; text-wrap: balance; }
h1 { font-size: var(--fs-2xl); font-weight: 800; letter-spacing: -.028em; line-height: 1.12; }
h2 { font-size: var(--fs-xl); letter-spacing: -.02em; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; }
p { margin: 0 0 1em; text-wrap: pretty; }
hr { border: 0; border-top: 1px solid var(--line); margin: 1.5rem 0; }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
::selection { background: color-mix(in srgb, var(--brand) 22%, transparent); }
::placeholder { color: var(--ink-3); opacity: .8; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--ink); color: var(--bg); padding: 8px 12px; border-radius: 8px; font-weight: 600; }
.skip:focus { left: 8px; }
.muted { color: var(--ink-3); }
.small { font-size: var(--fs-sm); }
.tiny { font-size: var(--fs-xs); }
.mono { font-family: var(--font-mono); font-size: .9em; }
.num, .tabnum { font-variant-numeric: tabular-nums; }
.nowrap { white-space: nowrap; }
.right { text-align: right; }
.center { text-align: center; }
.grow { flex: 1 1 auto; min-width: 0; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.clamp2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.stack > * + * { margin-top: var(--gap, 1rem); }
.row { display: flex; align-items: center; gap: var(--gap, .75rem); flex-wrap: wrap; }
.row.nowrap { flex-wrap: nowrap; white-space: normal; }   /* flex no-wrap only; the text inside may still wrap */
.between { justify-content: space-between; }
.grid { display: grid; gap: var(--gap, 1rem); grid-template-columns: repeat(auto-fill, minmax(min(var(--min, 260px), 100%), 1fr)); }
.cols-2 { display: grid; gap: 1.25rem; grid-template-columns: minmax(0, 1fr); }
/* grid/flex children may shrink below their content (long ids, URLs) instead of widening the page on phones */
.cols-2 > *, .cols-main-side > *, .grow { min-width: 0; }
.list a, .list li, .card-b, .kv dd { overflow-wrap: anywhere; }
@media (min-width: 900px) { .cols-2 { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } .cols-main-side { display: grid; gap: 1.5rem; grid-template-columns: minmax(0, 1fr) 340px; align-items: start; } }
/* visibility helpers keep each element's own display value (no "revert", which turned grid/flex navs into inline runs) */
@media (max-width: 899px) { .hide-mobile { display: none !important; } }
@media (min-width: 900px) { .hide-desktop { display: none !important; } }
.gradient-text { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ───────── buttons ───────── */
.btn { --bh: 44px; position: relative; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: var(--bh); padding: 0 1.15rem; border-radius: var(--radius-pill); border: 1px solid transparent;
  font: 600 .95rem/1 var(--font); letter-spacing: -.005em; cursor: pointer; white-space: nowrap; text-decoration: none !important; user-select: none; -webkit-user-select: none;
  transition: transform var(--dur-1) var(--ease), background-color var(--dur-2) var(--ease), background-position var(--dur-3) var(--ease), box-shadow var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease), filter var(--dur-2); }
.btn:active { transform: translateY(1px) scale(.985); }
.btn svg { flex: none; }
.btn-primary { background: var(--brand-fill); color: #fff; box-shadow: var(--shadow-brand), inset 0 1px 0 rgba(255, 255, 255, .18); }
.btn-primary:hover { background: var(--brand-fill-hover); }
.btn-grad { background: #cc00cc; color: #fff; box-shadow: 0 10px 24px -10px rgba(204, 0, 204, .75), inset 0 1px 0 rgba(255, 255, 255, .22); text-shadow: 0 1px 1px rgba(60, 0, 60, .25); }
.btn-grad:hover { background: #b000b0; box-shadow: 0 14px 30px -12px rgba(204, 0, 204, .85), inset 0 1px 0 rgba(255, 255, 255, .22); }
.btn-ghost { background: var(--bg-elev); color: var(--ink); border-color: var(--line-strong); box-shadow: var(--shadow-xs); }
.btn-ghost:hover { background: var(--bg-hover); border-color: color-mix(in srgb, var(--ink) 22%, var(--line-strong)); }
.btn-soft { background: var(--brand-soft); color: var(--brand-ink); }
.btn-soft:hover { background: color-mix(in srgb, var(--brand) 18%, var(--brand-soft)); }
.btn-danger { background: var(--bad-fill); color: #fff; }
.btn-danger:hover { filter: brightness(.94); }
.btn-quiet { background: transparent; color: var(--ink-2); }
.btn-quiet:hover { background: var(--bg-hover); color: var(--ink); }
.btn-link { background: none; border: 0; color: var(--brand); padding: 0; min-height: auto; border-radius: 4px; font-weight: 600; }
.btn-link:hover { text-decoration: underline; }
.btn-sm { --bh: 36px; padding: 0 .9rem; font-size: .86rem; }
.btn-lg { --bh: 52px; padding: 0 1.6rem; font-size: 1.02rem; }
.btn-icon { width: var(--bh); padding: 0; }
.btn-block { width: 100%; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .5; pointer-events: none; box-shadow: none; }
.btn .spin { width: 16px; height: 16px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (hover: hover) { .btn-primary:hover, .btn-grad:hover { transform: translateY(-1px); } .btn-primary:active, .btn-grad:active { transform: translateY(0) scale(.985); } }

/* ───────── forms ───────── */
.field { display: grid; gap: .4rem; }
.field + .field { margin-top: 1rem; }
label, .label { font-weight: 600; font-size: .9rem; color: var(--ink-2); }
.hint { font-size: .82rem; color: var(--ink-3); }
.input, input:not([type]), input[type=text], input[type=email], input[type=password], input[type=number], input[type=search], input[type=tel], input[type=url], input[type=date], input[type=time], input[type=datetime-local], input[type=month], select, textarea {
  width: 100%; min-height: 46px; padding: .65rem .9rem; border: 1px solid var(--line-strong); background: var(--bg-elev); color: var(--ink); border-radius: 12px; font: 400 1rem/1.4 var(--font);
  box-shadow: var(--shadow-xs); transition: border-color var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), background-color var(--dur-2); }
.input:hover, input:not([type]):hover, input[type=text]:hover, input[type=email]:hover, input[type=password]:hover, input[type=number]:hover, input[type=search]:hover, input[type=tel]:hover, input[type=url]:hover, input[type=date]:hover, select:hover, textarea:hover { border-color: color-mix(in srgb, var(--ink) 25%, var(--line-strong)); }
textarea { min-height: 120px; resize: vertical; line-height: 1.55; }
select { appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23877f8e' stroke-width='1.8' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .9rem center; padding-right: 2.4rem; text-overflow: ellipsis; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--brand); box-shadow: var(--ring); }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: none; }
input:disabled, select:disabled, textarea:disabled { background: var(--bg-sunken); color: var(--ink-3); cursor: not-allowed; }
input:user-invalid, textarea:user-invalid, select:user-invalid { border-color: var(--bad); }
.input-error { border-color: var(--bad) !important; }
.check { display: flex; gap: .6rem; align-items: flex-start; font-weight: 500; color: var(--ink); cursor: pointer; }
.check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--brand-fill); flex: none; }
input[type=checkbox], input[type=radio] { accent-color: var(--brand-fill); }
input[type=range] { accent-color: var(--brand-fill); }
input[type=file] { font: inherit; font-size: .9rem; color: var(--ink-2); max-width: 100%; }
input[type=file]::file-selector-button { font: 600 .85rem/1 var(--font); padding: .6rem .9rem; margin-right: .75rem; border-radius: 999px; border: 1px solid var(--line-strong); background: var(--bg-elev); color: var(--ink); cursor: pointer; }
input[type=file]::file-selector-button:hover { background: var(--bg-hover); }
.input-group { position: relative; }
.input-group .btn { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); }
.search { position: relative; }
.search input { padding-left: 2.6rem; border-radius: 999px; }
.search svg { position: absolute; left: .95rem; top: 50%; transform: translateY(-50%); color: var(--ink-3); pointer-events: none; }
fieldset { border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; margin: 0; min-width: 0; }
legend { font: 700 .9rem/1.2 var(--font-display); padding: 0 .4rem; }

/* ───────── surfaces ───────── */
.card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-s), var(--highlight); min-width: 0; }
.card-pad { padding: clamp(1rem, .8rem + .8vw, 1.5rem); }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .95rem 1.25rem; border-bottom: 1px solid var(--line); min-height: 56px; }
.card-h h2, .card-h h3 { margin: 0; font-size: 1rem; letter-spacing: -.01em; }
.card-h > a.small, .card-h > .small > a { font-weight: 600; white-space: nowrap; }
.card-b { padding: 1.25rem; }
.card-f { padding: .9rem 1.25rem; border-top: 1px solid var(--line); background: var(--bg-sunken); border-radius: 0 0 var(--radius) var(--radius); }
.card-link { display: block; color: inherit; transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2) var(--ease), border-color var(--dur-2); }
.card-link:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--line-strong); }
.card-link:active { transform: translateY(0); }
.panel { background: var(--bg-sunken); border-radius: var(--radius); padding: 1rem 1.25rem; }
.divider { height: 1px; background: var(--line); border: 0; margin: 1rem 0; }

.badge { display: inline-flex; align-items: center; gap: .35rem; padding: .22rem .62rem; border-radius: 999px; font: 600 .74rem/1.35 var(--font); letter-spacing: .005em; background: var(--bg-sunken); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; }
.badge-brand { background: var(--brand-soft); color: var(--brand-ink); border-color: transparent; }
.badge-ok { background: var(--ok-soft); color: var(--ok-ink); border-color: transparent; }
.badge-warn { background: var(--warn-soft); color: var(--warn-ink); border-color: transparent; }
.badge-bad { background: var(--bad-soft); color: var(--bad-ink); border-color: transparent; }
.badge-info { background: var(--info-soft); color: var(--info-ink); border-color: transparent; }
.badge-solid { background: var(--brand-fill); color: #fff; border-color: transparent; }
/* links inside running text must not rely on colour alone */
p a:not(.btn), .small a:not(.btn), .hint a:not(.btn) { text-decoration: underline; text-underline-offset: 2px; }
[data-reveal] { min-height: 28px; min-width: 44px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; display: inline-block; flex: none; }

.alert { display: flex; gap: .75rem; padding: .85rem 1rem; border-radius: 12px; background: var(--info-soft); color: var(--ink); border: 1px solid color-mix(in srgb, var(--info) 22%, transparent); }
.alert > svg { color: var(--info-ink); }
.alert-ok { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 25%, transparent); }
.alert-ok > svg { color: var(--ok-ink); }
.alert-warn { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 28%, transparent); }
.alert-warn > svg { color: var(--warn-ink); }
.alert-bad { background: var(--bad-soft); border-color: color-mix(in srgb, var(--bad) 25%, transparent); }
.alert-bad > svg { color: var(--bad-ink); }
.alert svg { flex: none; margin-top: 2px; }
.alert > div { min-width: 0; overflow-wrap: anywhere; }
.alert:has(> form) { flex-wrap: wrap; align-items: center; }
.alert > .grow { flex: 1 1 220px; }

.avatar { --s: 36px; width: var(--s); height: var(--s); border-radius: 50%; display: inline-grid; place-items: center; font: 700 calc(var(--s) * .38)/1 var(--font-display); letter-spacing: -.02em; color: #fff; background: var(--grad); flex: none; overflow: hidden; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .12); }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-ring { box-shadow: 0 0 0 2px var(--bg-elev), 0 0 0 4px var(--brand); }

/* progress */
.bar:not(rect) { height: 8px; border-radius: 999px; background: var(--track); overflow: hidden; box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--line) 60%, transparent); }
.bar:not(rect) > i { position: relative; display: block; height: 100%; width: var(--p, 0%); background: var(--grad); border-radius: inherit; animation: barfill 1s var(--ease) both; overflow: hidden; }
.bar:not(rect) > i::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .45), transparent); transform: translateX(-100%); animation: shine 1.6s var(--ease) .5s 1; }
@keyframes barfill { from { width: 0; } }
@keyframes shine { to { transform: translateX(100%); } }
.bar-thin:not(rect) { height: 5px; }
.ring { --p: 0; --s: 56px; width: var(--s); height: var(--s); border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--brand) calc(var(--p) * 1%), var(--track) 0); position: relative; flex: none; }
.ring::before { content: ""; position: absolute; inset: 5px; background: var(--bg-elev); border-radius: 50%; }
.ring > span { position: relative; font: 700 .78rem/1 var(--font-display); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
@property --pa { syntax: "<number>"; inherits: false; initial-value: 0; }

/* tables — clean lines, sticky header, no zebra */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius); overscroll-behavior-x: contain;
  background: linear-gradient(to right, var(--bg-elev) 30%, transparent) left / 24px 100% no-repeat local, linear-gradient(to left, var(--bg-elev) 30%, transparent) right / 24px 100% no-repeat local,
    radial-gradient(farthest-side at 0 50%, rgba(28, 10, 31, .14), transparent) left / 10px 100% no-repeat scroll, radial-gradient(farthest-side at 100% 50%, rgba(28, 10, 31, .14), transparent) right / 10px 100% no-repeat scroll; }
.card > .table-wrap:first-child { border-top-left-radius: inherit; border-top-right-radius: inherit; }
table.table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: .91rem; font-variant-numeric: tabular-nums; }
.table th { text-align: left; font: 600 .72rem/1.2 var(--font); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); padding: .7rem 1rem; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg-sunken) 75%, var(--bg-elev)); position: sticky; top: 0; z-index: 1; white-space: nowrap; }
.table th:first-child { border-top-left-radius: var(--radius); }
.table th:last-child { border-top-right-radius: var(--radius); }
.table td { padding: .78rem 1rem; border-bottom: 1px solid var(--line); vertical-align: middle; transition: background-color var(--dur-1); }
.table tr:last-child td { border-bottom: 0; }
.table tbody tr:hover td { background: var(--bg-hover); }
.table a { font-weight: 600; }
.table td.num, .table th.num { text-align: right; }
.table-dense td { padding-top: .5rem; padding-bottom: .5rem; }
/* phones: overflowing tables become stacked cards (app.js copies each column's header into data-label) */
@media (max-width: 639px) {
  table.table.is-stacked, table.table.is-stacked tbody, table.table.is-stacked tr, table.table.is-stacked td { display: block; width: 100%; }
  table.table.is-stacked thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  table.table.is-stacked tr { padding: .8rem 1rem; border-bottom: 1px solid var(--line); }
  table.table.is-stacked tbody tr:last-child { border-bottom: 0; }
  table.table.is-stacked tbody tr:hover td { background: none; }
  table.table.is-stacked td { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .28rem 0; border: 0; text-align: right; min-width: 0; overflow-wrap: anywhere; }
  table.table.is-stacked td > * { min-width: 0; }
  table.table.is-stacked td::before { content: attr(data-label); flex: none; max-width: 45%; text-align: left; font: 600 .74rem/1.3 var(--font); letter-spacing: .03em; color: var(--ink-3); }
  table.table.is-stacked td:first-child { justify-content: flex-start; flex-wrap: wrap; gap: .35rem .5rem; text-align: left; font-size: .98rem; padding-bottom: .45rem; }
  table.table.is-stacked td { max-width: none !important; white-space: normal; }
  table.table.is-stacked td.truncate { overflow: visible; }
  table.table.is-stacked td:first-child::before, table.table.is-stacked td[data-label=""]::before { display: none; }
  table.table.is-stacked td:empty { display: none; }
  .table-wrap:has(> table.is-stacked) { overflow: visible; background: none; }
}

/* tabs + segmented control */
.tabs { display: flex; gap: .15rem; border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 28px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 28px), transparent); padding-right: 24px; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a { position: relative; padding: .8rem .95rem; color: var(--ink-3); font-weight: 600; font-size: .94rem; white-space: nowrap; border-bottom: 2px solid transparent; margin-bottom: -1px; transition: color var(--dur-2); }
.tabs a::before { content: ""; position: absolute; inset: .35rem .2rem; border-radius: 8px; background: var(--bg-hover); opacity: 0; transition: opacity var(--dur-2); z-index: -1; }
.tabs a:hover { color: var(--ink); text-decoration: none; }
.tabs a:hover::before { opacity: 1; }
.tabs a[aria-current="page"] { color: var(--brand); border-color: var(--brand); }
.tabs { position: relative; isolation: isolate; }
.seg { display: inline-flex; background: var(--bg-sunken); border-radius: 999px; padding: 4px; gap: 2px; box-shadow: inset 0 0 0 1px var(--line); max-width: 100%; overflow-x: auto; scrollbar-width: none; }
.seg a, .seg button { border: 0; background: none; padding: .45rem .95rem; border-radius: 999px; font: 600 .85rem/1 var(--font); color: var(--ink-3); cursor: pointer; white-space: nowrap; transition: background-color var(--dur-2), color var(--dur-2), box-shadow var(--dur-2); }
.seg a:hover, .seg button:hover { color: var(--ink); text-decoration: none; }
.seg [aria-current="page"], .seg [aria-pressed="true"] { background: var(--bg-elev); color: var(--ink); box-shadow: var(--shadow-s), 0 0 0 1px var(--line); text-decoration: none; }

/* stat tiles */
.stats { display: grid; gap: .9rem; grid-template-columns: repeat(auto-fit, minmax(min(160px, 100%), 1fr)); }
.stat { position: relative; overflow: hidden; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem 1.05rem; box-shadow: var(--shadow-s), var(--highlight); display: flex; flex-direction: column; min-width: 0; }
.stat .k { font: 600 .8rem/1.3 var(--font); color: var(--ink-3); letter-spacing: .005em; text-wrap: balance; }
.stat .v { font: 800 1.85rem/1.1 var(--font-display); letter-spacing: -.03em; margin-top: .35rem; font-variant-numeric: tabular-nums; }
.stat .d { font-size: .8rem; color: var(--ink-3); margin-top: .25rem; }
.stat .spark { display: block; width: 100%; height: 34px; margin-top: auto; padding-top: .6rem; overflow: visible; }
.spark .sl { fill: none; stroke: var(--brand); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.spark .sa { fill: url(#spark-fill); fill: color-mix(in srgb, var(--brand) 14%, transparent); stroke: none; }
.spark .sd { fill: var(--brand); }
.stat .trend { display: inline-flex; align-items: center; gap: .2rem; font: 700 .74rem/1 var(--font); padding: .2rem .45rem; border-radius: 999px; background: var(--ok-soft); color: var(--ok-ink); margin-left: .35rem; vertical-align: .2em; }
.stat .trend.down { background: var(--bad-soft); color: var(--bad-ink); }

/* empty states — the » illustration comes from emptyState() in layout.js */
.empty { text-align: center; padding: clamp(2rem, 1.5rem + 2vw, 3.25rem) 1.5rem; color: var(--ink-3); display: grid; justify-items: center; }
.empty > svg { color: var(--brand); opacity: .8; margin-bottom: .75rem; }
.empty h3 { color: var(--ink); margin: .2rem 0 .35rem; font-size: 1.08rem; }
.empty p { max-width: 46ch; margin: 0 auto 1rem; font-size: .94rem; }
.empty p:last-child { margin-bottom: 0; }
.empty-art { width: 132px; height: 96px; margin-bottom: .9rem; overflow: visible; }
.empty-art .ea-bg { fill: var(--brand-soft); }
.empty-art .ea-c1 { fill: var(--brand); opacity: .9; }
.empty-art .ea-c2 { fill: var(--pink); opacity: .55; }
.empty-art .ea-c3 { fill: var(--orange); opacity: .4; }
.empty-art .ea-ic { color: var(--brand-ink); }
.empty-art .ea-chev { animation: eaFloat 4s var(--ease-in-out) infinite alternate; transform-origin: center; transform-box: fill-box; }
.empty-art .ea-chev:nth-of-type(2) { animation-delay: -1.3s; }
.empty-art .ea-chev:nth-of-type(3) { animation-delay: -2.6s; }
@keyframes eaFloat { to { transform: translateX(6px); } }

.chev { font-family: var(--font-display); font-weight: 800; color: var(--brand); letter-spacing: -.12em; }

/* skeleton loaders */
.skel { background: linear-gradient(90deg, var(--bg-sunken) 0%, var(--bg-hover) 40%, var(--bg-sunken) 80%) 0 0 / 200% 100%; animation: sk 1.4s ease-in-out infinite; border-radius: 8px; color: transparent !important; }
.skel-line { height: .85em; margin: .45em 0; }
.skel-line:last-child { width: 62%; }
@keyframes sk { to { background-position: -200% 0; } }

/* menus (details/summary) */
details.menu { position: relative; }
details.menu > summary { list-style: none; cursor: pointer; }
details.menu > summary::-webkit-details-marker { display: none; }
details.menu > .menu-list { position: absolute; right: 0; top: calc(100% + 8px); min-width: 240px; max-width: calc(100vw - 24px); background: var(--bg-elev-2); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow-l); padding: .4rem; z-index: 60; animation: pop var(--dur-2) var(--ease); transform-origin: top right; }
.menu-list a, .menu-list button { display: flex; align-items: center; gap: .65rem; width: 100%; padding: .6rem .75rem; border-radius: 10px; color: var(--ink); font: 500 .92rem/1.2 var(--font); background: none; border: 0; cursor: pointer; text-align: left; }
.menu-list a svg, .menu-list button svg { color: var(--ink-3); flex: none; }
.menu-list a:hover, .menu-list button:hover { background: var(--bg-hover); text-decoration: none; }
.menu-list a:hover svg, .menu-list button:hover svg { color: var(--brand); }
.menu-list hr { margin: .35rem .25rem; }
.menu-who { display: flex; align-items: center; gap: .7rem; padding: .6rem .75rem .55rem; min-width: 0; }
.menu-who > div { min-width: 0; }
@keyframes pop { from { opacity: 0; transform: translateY(-4px) scale(.97); } }

dialog { border: 1px solid var(--line); border-radius: var(--radius-l); padding: 0; background: var(--bg-elev); color: var(--ink); box-shadow: var(--shadow-l); width: min(560px, calc(100vw - 2rem)); max-height: calc(100dvh - 2rem); }
dialog[open] { animation: dlgIn var(--dur-3) var(--ease); }
dialog::backdrop { background: var(--scrim); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); animation: fadeIn var(--dur-2) ease; }
dialog .card-h { border-radius: var(--radius-l) var(--radius-l) 0 0; }
@keyframes dlgIn { from { opacity: 0; transform: translateY(12px) scale(.98); } }
@keyframes fadeIn { from { opacity: 0; } }
@media (max-width: 560px) { dialog { width: 100vw; max-width: 100vw; margin: auto 0 0; border-radius: var(--radius-l) var(--radius-l) 0 0; max-height: 92dvh; } dialog[open] { animation-name: sheetIn; } }
@keyframes sheetIn { from { transform: translateY(40px); opacity: 0; } }

.toast-host { position: fixed; z-index: 100; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom)); transform: translateX(-50%); display: grid; gap: 8px; width: min(440px, calc(100vw - 32px)); pointer-events: none; }
@media (max-width: 899px) { body:has(.tabbar) .toast-host, body:has(.player-nav) .toast-host { bottom: calc(84px + env(safe-area-inset-bottom)); } }
.toast { display: flex; align-items: center; gap: .6rem; background: color-mix(in srgb, var(--ink) 94%, transparent); color: var(--bg); padding: .8rem 1rem; border-radius: 14px; box-shadow: var(--shadow-l); font-weight: 500; font-size: .94rem; animation: toastIn var(--dur-3) var(--ease-spring); pointer-events: auto; backdrop-filter: blur(10px); }
.toast::before { content: ""; width: 20px; height: 20px; flex: none; border-radius: 50%; background: var(--ok) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6 10.5l2.6 2.6L14 7.6' fill='none' stroke='white' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat; }
.toast.bad { background: var(--bad-fill); color: #fff; }
.toast.bad::before { background: rgba(255, 255, 255, .22) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M10 6v5M10 14h.01' fill='none' stroke='white' stroke-width='2.2' stroke-linecap='round'/%3E%3C/svg%3E") center / 100% no-repeat; }
.toast.is-out { animation: toastOut var(--dur-2) ease forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateY(12px) scale(.96); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(8px); } }

/* ───────── app chrome ───────── */
.topbar { position: sticky; top: 0; z-index: 50; height: var(--topbar-h); display: flex; align-items: center; gap: 1rem; padding: 0 max(16px, env(safe-area-inset-left)); background: color-mix(in srgb, var(--bg-elev) 80%, transparent); backdrop-filter: saturate(1.8) blur(16px); -webkit-backdrop-filter: saturate(1.8) blur(16px); border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent); view-transition-name: topbar; }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--ink); text-decoration: none !important; flex: none; }
.brand img { height: 22px; width: auto; display: block; }
:root[data-theme="dark"] .brand .logo-dark, .brand .logo-light { display: block; }
.brand .logo-dark { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand .logo-light { display: none; } :root:not([data-theme="light"]) .brand .logo-dark { display: block; } }
:root[data-theme="dark"] .brand .logo-light { display: none; }
:root[data-theme="dark"] .brand .logo-dark { display: block; }
.brand .tag { font: 700 .66rem/1 var(--font); letter-spacing: .1em; text-transform: uppercase; color: var(--brand-ink); background: var(--brand-soft); padding: .32rem .5rem; border-radius: 6px; }
.nav { display: flex; gap: .2rem; padding: 4px; border-radius: 999px; }
.nav a { position: relative; padding: .55rem .95rem; border-radius: 999px; color: var(--ink-2); font-weight: 600; font-size: .93rem; transition: background-color var(--dur-2), color var(--dur-2); }
.nav a:hover { background: var(--bg-hover); text-decoration: none; color: var(--ink); }
.nav a[aria-current="page"] { color: var(--brand-ink); background: var(--brand-soft); }
.topbar .spacer { flex: 1; }
.icon-btn { width: 40px; height: 40px; display: inline-grid; place-items: center; border-radius: 50%; color: var(--ink-2); background: none; border: 0; cursor: pointer; position: relative; transition: background-color var(--dur-2), color var(--dur-2), transform var(--dur-1); }
.icon-btn:hover { background: var(--bg-hover); color: var(--ink); text-decoration: none; }
.icon-btn:active { transform: scale(.94); }
.icon-btn .pip { position: absolute; top: 8px; right: 8px; width: 9px; height: 9px; border-radius: 50%; background: var(--brand-bright); border: 2px solid var(--bg-elev); animation: pip 2.4s ease-out 1s 2; }
@keyframes pip { 0% { box-shadow: 0 0 0 0 rgba(255, 71, 255, .55); } 70%, 100% { box-shadow: 0 0 0 8px rgba(255, 71, 255, 0); } }
details.menu > summary .avatar { transition: box-shadow var(--dur-2); }
details.menu[open] > summary .avatar, details.menu > summary:hover .avatar { box-shadow: 0 0 0 2px var(--bg-elev), 0 0 0 4px color-mix(in srgb, var(--brand) 55%, transparent); }

.page { max-width: var(--content-max); margin: 0 auto; padding: clamp(1rem, .6rem + 1.6vw, 2rem) max(16px, env(safe-area-inset-left)) calc(104px + env(safe-area-inset-bottom)); }
@media (min-width: 900px) { .page { padding-bottom: 3.5rem; } }
.page-h { display: flex; align-items: flex-end; justify-content: space-between; gap: .75rem 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.page-h > div:first-child { min-width: 0; flex: 1 1 320px; }
.page-h h1 { margin: 0; overflow-wrap: anywhere; }
.page-h .sub { color: var(--ink-3); margin: .4rem 0 0; }
.page-h .row:empty { display: none; }
.crumbs { display: flex; flex-wrap: wrap; gap: .35rem; align-items: center; font-size: .84rem; color: var(--ink-3); margin-bottom: .55rem; min-width: 0; }
.crumbs a { color: var(--ink-3); font-weight: 500; }
.crumbs a:hover { color: var(--brand); }
.crumbs .sep { opacity: .55; }
.crumbs > span:last-child { color: var(--ink-2); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }

/* bottom tab bar on phones */
.tabbar { position: fixed; z-index: 55; left: 0; right: 0; bottom: 0; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; background: color-mix(in srgb, var(--bg-elev) 86%, transparent); backdrop-filter: saturate(1.8) blur(18px); -webkit-backdrop-filter: saturate(1.8) blur(18px); border-top: 1px solid color-mix(in srgb, var(--line) 80%, transparent); padding-bottom: env(safe-area-inset-bottom); view-transition-name: tabbar; }
.tabbar a { position: relative; display: grid; justify-items: center; gap: 4px; padding: 9px 2px 8px; color: var(--ink-3); font: 600 .68rem/1 var(--font); letter-spacing: .01em; min-width: 0; }
.tabbar a span { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tabbar a svg { transition: transform var(--dur-2) var(--ease-spring); }
.tabbar a[aria-current="page"] { color: var(--brand); }
.tabbar a[aria-current="page"]::before { content: ""; position: absolute; top: 0; left: 50%; width: 28px; height: 3px; margin-left: -14px; border-radius: 0 0 4px 4px; background: var(--grad); }
.tabbar a[aria-current="page"] svg { transform: translateY(-1px); }
.tabbar a:hover { text-decoration: none; color: var(--ink); }
.tabbar a:active svg { transform: scale(.9); }
@media (min-width: 900px) { .tabbar { display: none; } }

/* hero */
.hero { position: relative; overflow: hidden; color: #fff; background: var(--grad-deep); border-radius: var(--radius-l); padding: clamp(1.5rem, 1rem + 3vw, 3rem); isolation: isolate; box-shadow: 0 24px 60px -30px rgba(60, 0, 60, .6); }
.hero::after { content: "»"; position: absolute; right: -0.05em; bottom: -0.32em; font: 900 clamp(10rem, 6rem + 18vw, 22rem)/1 var(--font-display); color: rgba(255, 71, 255, .08); letter-spacing: -.12em; z-index: -1; pointer-events: none; }
.hero h1 { color: #fff; }
.hero .sub { color: rgba(255, 255, 255, .78); max-width: 60ch; }
.hero .btn-ghost { background: rgba(255, 255, 255, .06); color: #fff; border-color: rgba(255, 255, 255, .3); box-shadow: none; }
.hero .btn-ghost:hover { background: rgba(255, 255, 255, .14); }
.hero .bar:not(rect) { background: rgba(255, 255, 255, .15); box-shadow: none; }
:where(.hero, .auth-art, .wl, .lx-chero, .ops-hero) :focus-visible { outline-color: #fff; }

/* animated gradient mesh (hero, auth art, welcome): <div class="mesh" aria-hidden="true"><i></i><i></i><i></i></div> */
.mesh { position: absolute; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.mesh i { position: absolute; width: 70%; aspect-ratio: 1; border-radius: 50%; filter: blur(60px); opacity: .55; will-change: transform; }
.mesh i:nth-child(1) { left: -20%; top: -45%; background: radial-gradient(circle, #ff47ff 0%, transparent 65%); animation: mesh1 18s var(--ease-in-out) infinite alternate; }
.mesh i:nth-child(2) { right: -25%; top: -30%; background: radial-gradient(circle, #ff47ff 0%, transparent 65%); opacity: .4; animation: mesh2 22s var(--ease-in-out) infinite alternate; }
.mesh i:nth-child(3) { left: 25%; bottom: -60%; background: radial-gradient(circle, #cc00cc 0%, transparent 65%); opacity: .45; animation: mesh3 26s var(--ease-in-out) infinite alternate; }
@keyframes mesh1 { to { transform: translate(30%, 25%) scale(1.15); } }
@keyframes mesh2 { to { transform: translate(-25%, 30%) scale(.9); } }
@keyframes mesh3 { to { transform: translate(-20%, -25%) scale(1.2); } }
/* » pattern: a faint field of chevrons */
.chev-field { position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='56' viewBox='0 0 56 56'%3E%3Cpath d='M20 22l6 6-6 6M28 22l6 6-6 6' fill='none' stroke='%23ffffff' stroke-opacity='.07' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  -webkit-mask-image: linear-gradient(115deg, transparent 20%, #000 75%); mask-image: linear-gradient(115deg, transparent 20%, #000 75%); }

/* course cards */
.ccard { display: flex; flex-direction: column; overflow: hidden; height: 100%; }
.ccard .cover { aspect-ratio: 16 / 8; background: var(--grad-deep); position: relative; overflow: hidden; }
.cover[data-tone="1"] { background: radial-gradient(120% 90% at 0% 0%, rgba(255, 71, 255, .55), transparent 60%), radial-gradient(100% 100% at 100% 100%, rgba(255, 71, 255, .45), transparent 60%), #262326; }
.cover[data-tone="2"] { background: radial-gradient(110% 90% at 100% 0%, rgba(204, 0, 204, .6), transparent 60%), radial-gradient(90% 90% at 0% 100%, rgba(204, 0, 204, .5), transparent 60%), #221f22; }
.cover[data-tone="3"] { background: radial-gradient(120% 100% at 0% 100%, rgba(255, 71, 255, .55), transparent 60%), radial-gradient(90% 80% at 100% 0%, rgba(204, 0, 204, .45), transparent 60%), #262326; }
.cover[data-tone="4"] { background: radial-gradient(120% 90% at 50% 0%, rgba(204, 0, 204, .6), transparent 65%), radial-gradient(80% 80% at 100% 100%, rgba(255, 71, 255, .3), transparent 60%), #161416; }
.cover:not(:has(img))::after { content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 48 48'%3E%3Cpath d='M17 18l6 6-6 6M25 18l6 6-6 6' fill='none' stroke='%23ffffff' stroke-opacity='.06' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.ccard .cover img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s var(--ease); }
.ccard:hover .cover img { transform: scale(1.04); }
.ccard .cover .org { position: absolute; left: 12px; top: 12px; z-index: 1; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.cover .monogram { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: .08em; font: 800 2.4rem/1 var(--font-display); color: rgba(255, 255, 255, .92); letter-spacing: -.04em; z-index: 1; text-shadow: 0 4px 20px rgba(0, 0, 0, .25); }
.cover .monogram .chev { color: #ff47ff !important; font-size: .9em; transform: translateY(-.02em); }
.ccard .body { padding: 1rem 1.1rem 1.1rem; display: flex; flex-direction: column; gap: .55rem; flex: 1; }
.ccard h3 { margin: 0; font-size: 1rem; line-height: 1.32; letter-spacing: -.01em; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; overflow-wrap: anywhere; }
.ccard .meta { display: flex; gap: .5rem .9rem; flex-wrap: wrap; align-items: center; font-size: .82rem; color: var(--ink-3); }
.ccard .foot { margin-top: auto; padding-top: .4rem; }

/* ───────── admin shell ───────── */
.shell { display: grid; grid-template-columns: 1fr; min-height: 100dvh; }
@media (min-width: 1000px) { .shell { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); } }
.sidebar { display: none; position: sticky; top: 0; height: 100dvh; overflow-y: auto; background: var(--bg-elev); border-right: 1px solid var(--line); padding: 1rem .75rem; scrollbar-width: thin; view-transition-name: sidebar; }
@media (min-width: 1000px) { .sidebar { display: flex; flex-direction: column; gap: 1rem; } }
.sidebar .brand { padding: .4rem .6rem .8rem; }
.side-nav { display: grid; gap: 1px; }
.side-nav .grp { font: 700 .66rem/1 var(--font); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); padding: 1.1rem .75rem .45rem; }
.side-nav a { position: relative; display: flex; align-items: center; gap: .7rem; padding: .56rem .75rem; border-radius: 10px; color: var(--ink-2); font-weight: 600; font-size: .9rem; transition: background-color var(--dur-1), color var(--dur-1); }
.side-nav a svg { flex: none; opacity: .75; transition: opacity var(--dur-1), color var(--dur-1); }
.side-nav a:hover { background: var(--bg-hover); color: var(--ink); text-decoration: none; }
.side-nav a:hover svg { opacity: 1; }
.side-nav a[aria-current="page"] { background: var(--brand-soft); color: var(--brand-ink); }
.side-nav a[aria-current="page"]::before { content: ""; position: absolute; left: -.75rem; top: 8px; bottom: 8px; width: 3px; border-radius: 0 3px 3px 0; background: var(--grad); }
.side-nav a[aria-current="page"] svg { opacity: 1; color: var(--brand); }
.side-foot { margin-top: auto; }
.main { min-width: 0; }
.mobile-drawer[open] { position: fixed; inset: 0; z-index: 80; }
.mobile-drawer > summary { list-style: none; }
.mobile-drawer > summary::-webkit-details-marker { display: none; }
.mobile-drawer .drawer { position: fixed; inset: 0 auto 0 0; width: min(86vw, 320px); background: var(--bg-elev); z-index: 81; padding: 1rem .75rem calc(1rem + env(safe-area-inset-bottom)); overflow-y: auto; box-shadow: var(--shadow-l); animation: slide var(--dur-3) var(--ease); border-radius: 0 var(--radius-l) var(--radius-l) 0; }
.mobile-drawer .drawer .side-nav a[aria-current="page"]::before { left: -.75rem; }
.mobile-drawer .scrim { position: fixed; inset: 0; background: var(--scrim); z-index: 80; animation: fadeIn var(--dur-2) ease; backdrop-filter: blur(2px); }
@keyframes slide { from { transform: translateX(-100%); } }

/* ───────── auth ───────── */
.auth { min-height: 100dvh; display: grid; grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
@media (min-width: 960px) { .auth { grid-template-columns: 1.05fr 1fr; grid-template-rows: 1fr; } }
.auth-art { position: relative; overflow: hidden; background: var(--night); color: #fff; padding: 1.25rem max(16px, env(safe-area-inset-left)) 1.4rem; isolation: isolate; display: flex; flex-direction: column; gap: .9rem; }
.auth-art .mesh i { filter: blur(50px); }
.auth-art > div:not(.mesh):not(.chev-field), .auth-art > .brand, .auth-art > p { position: relative; z-index: 1; }
.auth-art .auth-art-foot { display: none; }
.auth-art::after { content: "»"; position: absolute; right: -.06em; bottom: -.34em; font: 900 13rem/1 var(--font-display); letter-spacing: -.14em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; opacity: .5; pointer-events: none; z-index: 0; }
.auth-art h2 { font-size: clamp(1.45rem, 1rem + 2.6vw, 3.2rem); font-weight: 800; letter-spacing: -.035em; line-height: 1.05; max-width: 14ch; color: #fff; margin: .2rem 0 .3rem; }
.auth-art h2 em { font-style: normal; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.auth-art p { color: rgba(255, 255, 255, .76); max-width: 42ch; margin: 0; font-size: .95rem; }
.auth-feats { display: none; list-style: none; margin: 1.75rem 0 0; padding: 0; gap: .6rem; }
.auth-feats li { display: flex; align-items: center; gap: .7rem; color: rgba(255, 255, 255, .86); font-size: .95rem; }
.auth-feats li span { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: rgba(255, 255, 255, .09); border: 1px solid rgba(255, 255, 255, .12); flex: none; color: #ffb8ff; }
@media (max-width: 959px) { .auth-art p.auth-lede { display: none; } .auth-art .brand img { height: 20px; width: auto; } .auth-art { padding-bottom: 2.4rem; } }
@media (min-width: 960px) {
  .auth-art { padding: 3rem; justify-content: space-between; gap: 2rem; }
  .auth-art::after { font-size: 34rem; }
  .auth-art .auth-art-foot { display: block; }
  .auth-feats { display: grid; }
  .auth-art p { font-size: 1.05rem; }
}
.auth-form { display: grid; place-items: center; padding: 1.75rem max(16px, env(safe-area-inset-left)) calc(2rem + env(safe-area-inset-bottom)); position: relative; }
@media (max-width: 959px) { .auth-form { place-items: start center; margin-top: -1.1rem; background: var(--bg); border-radius: var(--radius-xl) var(--radius-xl) 0 0; position: relative; z-index: 1; } }
.auth-card { width: min(420px, 100%); animation: riseIn var(--dur-4) var(--ease) both; }
.auth-card h1 { font-size: clamp(1.7rem, 1.4rem + 1vw, 2.1rem); margin-bottom: .35rem; }
.auth-card > .brand { margin-bottom: 1.75rem !important; }
@media (max-width: 959px) { .auth-card > .brand.hide-desktop { display: none !important; } }
@keyframes riseIn { from { opacity: 0; transform: translateY(10px); } }

/* ───────── course player ───────── */
.player { display: grid; grid-template-columns: 1fr; min-height: calc(100dvh - var(--topbar-h)); }
@media (min-width: 1100px) { .player { grid-template-columns: var(--outline-w) minmax(0, 1fr); } }
.player-side { display: none; border-right: 1px solid var(--line); background: var(--bg-elev); position: sticky; top: var(--topbar-h); height: calc(100dvh - var(--topbar-h)); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
@media (min-width: 1100px) { .player-side { display: block; } }
.player-main { min-width: 0; }
.unit { max-width: var(--read-max); margin: 0 auto; padding: 1.5rem max(18px, env(safe-area-inset-left)) calc(120px + env(safe-area-inset-bottom)); }
.unit-head { margin-bottom: 1.5rem; }
.unit-head h1 { font-size: clamp(1.45rem, 1.15rem + 1.2vw, 2.05rem); margin: .25rem 0 0; letter-spacing: -.03em; }
.seqbar { display: flex; gap: 4px; margin: 1.1rem 0 0; }
.seqbar a { flex: 1; height: 6px; border-radius: 999px; background: var(--track); box-shadow: inset 0 0 0 1px var(--line); }
.seqbar a.done { background: color-mix(in srgb, var(--brand) 45%, var(--bg-sunken)); }
.seqbar a[aria-current="page"] { background: var(--brand-fill); }
.unit .block { margin: 2rem 0; }
.unit .block + .block { padding-top: 2rem; border-top: 1px solid var(--line); }
.block-title { font: 700 1.1rem/1.3 var(--font-display); letter-spacing: -.015em; margin: 0 0 .85rem; }
/* course content typography */
.prose { font-size: 1.0625rem; line-height: 1.72; overflow-wrap: anywhere; color: var(--ink); }
.prose > * { max-width: 70ch; }
.prose > :is(img, figure, table, pre, iframe, video, div, .lx-embed) { max-width: 100%; }
.prose h1, .prose h2, .prose h3, .prose h4 { margin: 1.6em 0 .55em; letter-spacing: -.02em; }
.prose h1 { font-size: 1.6rem; } .prose h2 { font-size: 1.35rem; } .prose h3 { font-size: 1.15rem; } .prose h4 { font-size: 1.02rem; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.05em; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin: .3em 0; }
.prose li::marker { color: var(--brand); font-weight: 700; }
.prose strong, .prose b { font-weight: 700; }   /* colour inherits — authored white text in dark banners must stay white */
.prose a { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--brand) 45%, transparent); text-underline-offset: 3px; }
.prose a:hover { text-decoration-color: currentColor; }
.prose img { border-radius: 12px; }
.prose figure { margin: 1.5em 0; }
.prose figcaption { font-size: .85rem; color: var(--ink-3); margin-top: .5rem; text-align: center; }
.prose table { border-collapse: separate; border-spacing: 0; width: 100%; display: block; overflow-x: auto; font-size: .94rem; border: 1px solid var(--line); border-radius: 12px; }
.prose th, .prose td { border-bottom: 1px solid var(--line); padding: .6rem .8rem; text-align: left; vertical-align: top; }
.prose th { background: var(--bg-sunken); font-weight: 700; }
.prose tr:last-child td { border-bottom: 0; }
.prose code { font-family: var(--font-mono); font-size: .88em; background: var(--bg-sunken); padding: .12em .38em; border-radius: 6px; border: 1px solid var(--line); }
.prose pre { background: var(--bg-sunken); padding: 1rem 1.1rem; border-radius: 12px; overflow-x: auto; border: 1px solid var(--line); font-size: .9rem; line-height: 1.6; }
.prose pre code { background: none; border: 0; padding: 0; }
.prose blockquote { margin: 1.4em 0; padding: .75rem 1.1rem; border-left: 3px solid var(--brand); background: var(--brand-softer); border-radius: 0 12px 12px 0; color: var(--ink-2); }
.prose hr { margin: 2em 0; }
.prose iframe { border: 0; border-radius: 12px; width: 100%; aspect-ratio: 16 / 9; height: auto; }
.video { position: relative; border-radius: 16px; overflow: hidden; background: #000; aspect-ratio: 16 / 9; box-shadow: var(--shadow); }
.video video, .video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.player-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; display: flex; gap: .75rem; justify-content: space-between; align-items: center; padding: .65rem max(16px, env(safe-area-inset-left)) calc(.65rem + env(safe-area-inset-bottom)); background: color-mix(in srgb, var(--bg-elev) 84%, transparent); backdrop-filter: saturate(1.8) blur(18px); -webkit-backdrop-filter: saturate(1.8) blur(18px); border-top: 1px solid color-mix(in srgb, var(--line) 80%, transparent); view-transition-name: playernav; }
@media (min-width: 1100px) { .player-nav { left: var(--outline-w); } }
.player-nav .where { font-size: .82rem; color: var(--ink-3); text-align: center; }

.outline { padding: .75rem; }
.outline details { border-radius: 12px; }
.outline summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: .6rem; padding: .7rem .75rem; border-radius: 10px; font-weight: 700; font-size: .9rem; }
.outline summary::-webkit-details-marker { display: none; }
.outline summary:hover { background: var(--bg-hover); }
.outline summary .caret { transition: transform var(--dur-2) var(--ease); color: var(--ink-3); margin-left: auto; flex: none; }
.outline details[open] > summary .caret { transform: rotate(90deg); }
.outline ul { list-style: none; margin: 0; padding: 0 0 .4rem; }
.outline li a { display: flex; align-items: flex-start; gap: .6rem; padding: .5rem .75rem .5rem 1rem; border-radius: 10px; color: var(--ink-2); font-size: .88rem; line-height: 1.4; transition: background-color var(--dur-1); }
.outline li a:hover { background: var(--bg-hover); text-decoration: none; color: var(--ink); }
.outline li a[aria-current="page"] { background: var(--brand-soft); color: var(--brand-ink); font-weight: 600; box-shadow: inset 3px 0 0 var(--brand); }
.tick { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--line-strong); flex: none; margin-top: 1px; display: grid; place-items: center; transition: background-color var(--dur-2), border-color var(--dur-2); }
.tick.done { background: var(--ok-fill); border-color: var(--ok-fill); color: #fff; }
.tick.done svg { animation: tickPop var(--dur-3) var(--ease-spring) both; }
.tick.part { border-color: var(--brand); background: conic-gradient(var(--brand) 50%, transparent 0); }
@keyframes tickPop { from { transform: scale(.4); opacity: 0; } }

/* problems */
.problem { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow-s), var(--highlight); }
.problem .q { margin-bottom: 1rem; }
.choices { display: grid; gap: .6rem; margin: .75rem 0 1rem; }
.choice { position: relative; display: flex; gap: .75rem; align-items: flex-start; padding: .85rem 1rem; border: 1.5px solid var(--line-strong); border-radius: 12px; cursor: pointer; background: var(--bg-elev); transition: border-color var(--dur-2), background-color var(--dur-2), transform var(--dur-1), box-shadow var(--dur-2); }
.choice:hover { border-color: color-mix(in srgb, var(--brand) 60%, var(--line-strong)); background: var(--bg-hover); }
.choice:active { transform: scale(.995); }
.choice input { accent-color: var(--brand-fill); width: 18px; height: 18px; margin: 2px 0 0; flex: none; }
.choice:has(input:checked) { border-color: var(--brand); background: var(--brand-softer); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 12%, transparent); }
.choice:has(input:focus-visible) { outline: 2px solid var(--focus); outline-offset: 2px; }
.choice.correct { border-color: var(--ok); background: var(--ok-soft); box-shadow: none; }
.choice.incorrect { border-color: var(--bad); background: var(--bad-soft); box-shadow: none; }
.result { display: flex; gap: .6rem; align-items: center; padding: .75rem .95rem; border-radius: 12px; font-weight: 600; margin-top: .75rem; }
.result.ok { background: var(--ok-soft); color: var(--ok-ink); }
.result.no { background: var(--bad-soft); color: var(--bad-ink); }
.result.part { background: var(--warn-soft); color: var(--warn-ink); }
.problem-foot { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 1rem; }

/* timeline / list */
.list { display: grid; }
.list > * { padding: .9rem 1.15rem; border-bottom: 1px solid var(--line); }
.list > *:last-child { border-bottom: 0; }
.list > a { color: inherit; transition: background-color var(--dur-1); }
.list > a:hover { text-decoration: none; background: var(--bg-hover); }
.card > .list > *:last-child { border-radius: 0 0 var(--radius) var(--radius); }
.kv { display: grid; grid-template-columns: minmax(110px, 34%) minmax(0, 1fr); gap: .65rem 1rem; font-size: .93rem; }
.kv dt { color: var(--ink-3); }
.kv dd { margin: 0; overflow-wrap: anywhere; }

.pager { display: flex; gap: .35rem; align-items: center; justify-content: center; margin-top: 1.25rem; flex-wrap: wrap; }

/* calendar-ish session list */
.session { display: grid; grid-template-columns: 64px minmax(0, 1fr) auto; gap: 1rem; align-items: center; }
.date-chip { text-align: center; border-radius: 12px; background: var(--brand-soft); color: var(--brand-ink); padding: .45rem 0 .5rem; font-weight: 700; line-height: 1.1; overflow: hidden; box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand) 14%, transparent); }
.date-chip .m { font-size: .66rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; }
.date-chip .d { font: 800 1.4rem/1 var(--font-display); letter-spacing: -.03em; margin-top: .1rem; font-variant-numeric: tabular-nums; }

/* error pages (404 / 403 / 500) */
.errp-page { background: var(--night); }
.errp { position: relative; isolation: isolate; overflow: hidden; min-height: 100dvh; display: grid; place-items: center; padding: 2rem max(16px, env(safe-area-inset-left)); color: #fff; background: var(--night); text-align: center; }
.errp::after { content: "»"; position: absolute; right: -.06em; bottom: -.36em; z-index: -1; font: 900 clamp(16rem, 10rem + 30vw, 40rem)/1 var(--font-display); letter-spacing: -.14em; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; opacity: .22; pointer-events: none; }
.errp-card { max-width: 520px; display: grid; justify-items: center; animation: riseIn var(--dur-4) var(--ease) both; }
.errp .brand { margin-bottom: 2.25rem; }
.errp-code { margin: 0; font: 900 clamp(5rem, 3.5rem + 8vw, 8.5rem)/.9 var(--font-display); letter-spacing: -.06em; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; display: flex; align-items: center; }
.errp-code .chev { font-size: .55em; margin-left: .08em; color: transparent; background: inherit; -webkit-background-clip: text; background-clip: text; animation: chevNudge 2.6s var(--ease-in-out) .6s infinite; display: inline-block; }
@keyframes chevNudge { 0%, 100% { transform: translateX(0); } 40% { transform: translateX(.12em); } 60% { transform: translateX(0); } }
.errp h1 { color: #fff; margin: 1rem 0 .5rem; font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.2rem); }
.errp-text { color: rgba(255, 255, 255, .76); margin: 0 0 1.6rem; font-size: 1.05rem; }
.errp-actions { justify-content: center; }
.errp .btn-ghost { background: rgba(255, 255, 255, .06); color: #fff; border-color: rgba(255, 255, 255, .3); box-shadow: none; }
.errp .btn-ghost:hover { background: rgba(255, 255, 255, .14); }
.errp-help { margin: 2rem 0 0; font-size: .88rem; color: rgba(255, 255, 255, .6); }
.errp-help a { color: #ffc2ff; }
.errp :focus-visible { outline-color: #fff; }

/* celebration burst (learn.js / player.js add .burst once; reduced motion: nothing) */
.burst { position: fixed; inset: 0; pointer-events: none; z-index: 120; overflow: hidden; }
.burst i { position: absolute; left: var(--x); top: -24px; width: 10px; height: 14px; border-radius: 2px; background: var(--c); opacity: 0; transform: rotate(var(--r)); animation: confetti var(--d) cubic-bezier(.2, .6, .4, 1) var(--w) forwards; }
.burst i.ch { width: auto; height: auto; background: none; color: var(--c); font: 900 22px/1 var(--font-display); letter-spacing: -.14em; }
.burst i.ch::before { content: "»"; }
@keyframes confetti { 0% { opacity: 1; transform: translate3d(0, 0, 0) rotate(var(--r)); } 100% { opacity: 0; transform: translate3d(var(--dx), 105vh, 0) rotate(calc(var(--r) + 540deg)); } }

/* page transitions (View Transitions API, cross-document; ignored where unsupported) */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vtOut 160ms ease both; }
::view-transition-new(root) { animation: vtIn 260ms var(--ease) both; }
@keyframes vtOut { to { opacity: 0; } }
@keyframes vtIn { from { opacity: 0; transform: translateY(6px); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  ::view-transition-group(*), ::view-transition-old(*), ::view-transition-new(*) { animation: none !important; }
  .burst { display: none; }
}
@media print { .topbar, .tabbar, .sidebar, .player-nav, .player-side, #exa-root, .toast-host { display: none !important; } body { background: #fff; } .card { box-shadow: none; } }

/* "View as" bar for staff on learner pages */
.viewas-bar { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; justify-content: center; padding: .5rem max(16px, env(safe-area-inset-left)); font-size: .85rem; background: var(--bg-sunken); color: var(--ink-2); border-bottom: 1px solid var(--line); }
.viewas-bar.is-staff { background: var(--warn-soft); color: var(--ink); }
.viewas-bar svg { flex: none; }


/* ───────── Excelerate brand book 2024 ───────── */
/* signature gradient underline (red → magenta → blue) under page titles */
.page-h h1, .hero h1, .auth-card h1 { position: relative; padding-bottom: .35em; }
.page-h h1::after, .hero h1::after, .auth-card h1::after { content: ""; position: absolute; left: 0; bottom: 0; width: min(100%, 4.5em); height: 4px; border-radius: 4px; background: var(--grad); }
/* yellow accent: highlights + CTAs on dark surfaces (sparingly, ~5%) */
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-accent:hover { filter: brightness(.94); }
.hero .btn-grad, .auth-art .btn-grad { background: var(--accent); color: var(--accent-ink); text-shadow: none; box-shadow: 0 10px 24px -12px rgba(255, 248, 0, .55); }
.hero .btn-grad:hover { background: #f2eb00; }
.badge-accent { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
mark, .mark { background: var(--accent); color: var(--accent-ink); padding: 0 .2em; border-radius: 3px; }
/* text on dark brand surfaces uses #FF47FF; on light surfaces #660066 (brand book colour rules) */
.hero .eyebrow, .hero .lx-eyebrow { color: var(--brand-bright); }

/* ───────── premium layer (design pass v3, brand book 2024) ─────────
   Brand graphic elements are real chevrons (outlined single, solid double, pattern texture) — used once per surface.
   Motion rule: the static state is always the finished state; animations only run FROM an initial state
   (fill-mode backwards), so reduced motion (animations off) and no-JS both show complete, correct UI. */
:root {
  --chev-outline: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 96'%3E%3Cpath d='M3 3h22l30 45-30 45H3l30-45z' fill='none' stroke='%23cc00cc' stroke-width='2.2' stroke-linejoin='round'/%3E%3C/svg%3E");
  --chev-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='26' viewBox='0 0 30 26'%3E%3Cpath d='M7 7l6 6-6 6M14 7l6 6-6 6' fill='none' stroke='%23cc00cc' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  --ease-out-soft: cubic-bezier(.2, .8, .2, 1);
}
/* one outlined chevron per dark surface (webinar / blog templates), replacing the » glyph watermark */
.hero::after, .lx-chero::after, .auth-art::after, .errp::after, .lx-pass::after {
  content: ""; font: 0/0 a; letter-spacing: 0; color: transparent; -webkit-text-fill-color: transparent; background: var(--chev-outline) center / contain no-repeat; -webkit-background-clip: border-box; background-clip: border-box;
  top: clamp(1rem, 4%, 2.5rem); bottom: auto; right: clamp(-10px, 3%, 2.5rem); width: clamp(84px, 9vw + 40px, 168px); aspect-ratio: 60 / 96; height: auto; opacity: .7; }
.auth-art::after { width: clamp(90px, 14vw, 260px); top: auto; bottom: clamp(1rem, 6%, 4rem); opacity: .55; }
.errp::after { width: clamp(120px, 20vw, 300px); top: auto; bottom: 6%; opacity: .45; }
/* chevron pattern texture fading in from one corner (brand name card) */
.chev-field { opacity: .55; background: var(--chev-pattern) 0 0 / 30px 26px repeat;
  -webkit-mask-image: radial-gradient(130% 120% at 100% 100%, #000 0%, rgba(0, 0, 0, .55) 30%, transparent 62%); mask-image: radial-gradient(130% 120% at 100% 100%, #000 0%, rgba(0, 0, 0, .55) 30%, transparent 62%); }
.auth-art .chev-field { animation: chevDrift 26s linear infinite; }
@keyframes chevDrift { to { background-position: 60px -52px; } }
/* restrained magenta glow: night stays the dominant 60 % */
.hero .mesh i, .ops-hero .mesh i { opacity: .3; }
.hero .mesh i:nth-child(3) { opacity: .16; }
.mesh.is-paused i { animation-play-state: paused; }
/* gradient title underline draws in once */
.page-h h1::after, .hero h1::after, .auth-card h1::after { transform-origin: 0 50%; animation: ulDraw .9s var(--ease) .2s backwards; }
@keyframes ulDraw { from { transform: scaleX(0); } }

/* scroll reveal (app.js adds .rv-in as items enter; theme.js arms html.rv; a CSS fail-safe shows everything after 3 s) */
html.rv :is(.lx-cgrid, .stats, .lx-outline, .lx-side, .lx-updates, .cols-2, .rv-group) > :not(.rv-in) { opacity: 0; }
html.rv :is(.lx-cgrid, .stats, .lx-outline, .lx-side, .lx-updates, .cols-2, .rv-group) > .rv-in { animation: rvIn .62s var(--ease-out-soft) var(--rv-d, 0ms) backwards; }
html.rv:not(.rv-ready) :is(.lx-cgrid, .stats, .lx-outline, .lx-side, .lx-updates, .cols-2, .rv-group) > * { animation: rvSafe .3s ease 3s forwards; }
@keyframes rvIn { from { opacity: 0; transform: translateY(10px); } }
@keyframes rvSafe { to { opacity: 1; } }

/* progress rings fill from zero (registered property; plain value where @property is unsupported) */
@property --rp { syntax: "<number>"; inherits: false; initial-value: 0; }
.ring { --rp: var(--p); background: conic-gradient(var(--brand) calc(var(--rp) * 1%), var(--track) 0); animation: ringIn 1.1s var(--ease) .25s backwards; }
@keyframes ringIn { from { --rp: 0; } }
/* sparklines draw left to right */
.spark .sl { stroke-dasharray: 1; stroke-dashoffset: 0; animation: lineDraw 1.3s var(--ease) .35s backwards; }
.spark .sa { animation: fadeIn .9s ease .9s backwards; }
@keyframes lineDraw { from { stroke-dashoffset: 1; } }

/* » micro-motion: forward arrows nudge on hover */
.i-go { transition: transform var(--dur-2) var(--ease); }
@media (hover: hover) { :is(a, button, .btn):hover > .i-go, :is(.lx-upnext, .lx-resume, .lx-sh-link):hover .i-go { transform: translateX(3px); } }

/* dialogs spring in; menus pop */
dialog[open] { animation: dlgIn var(--dur-4) var(--ease-spring); }
@keyframes dlgIn { from { opacity: 0; transform: translateY(14px) scale(.96); } }

/* course cards: lift, B&W photography, template label chips */
.ccard { transition: transform .38s var(--ease), box-shadow .38s var(--ease), border-color var(--dur-2); }
@media (hover: hover) { .ccard.card-link:hover { transform: translateY(-4px); box-shadow: var(--shadow-l), 0 0 0 1px color-mix(in srgb, var(--brand) 26%, transparent); border-color: color-mix(in srgb, var(--brand) 30%, var(--line)); } }
.cover img { filter: grayscale(1) contrast(1.06); }
.cover[data-tone] { background: radial-gradient(90% 120% at 0% 0%, rgba(204, 0, 204, .34), transparent 58%), #1c1a1c; }
.cover[data-tone="2"] { background: radial-gradient(90% 120% at 100% 0%, rgba(204, 0, 204, .36), transparent 58%), #1c1a1c; }
.cover[data-tone="3"] { background: radial-gradient(100% 120% at 0% 100%, rgba(102, 0, 102, .7), transparent 60%), #1c1a1c; }
.cover[data-tone="4"] { background: radial-gradient(120% 120% at 50% 0%, rgba(204, 0, 204, .28), transparent 60%), #161416; }
.cover:not(:has(img))::after { background: var(--chev-pattern) 0 0 / 30px 26px repeat; opacity: .42;
  -webkit-mask-image: radial-gradient(110% 130% at 100% 100%, #000, transparent 58%); mask-image: radial-gradient(110% 130% at 100% 100%, #000, transparent 58%); }
.cover .monogram { font-weight: 800; letter-spacing: -.05em; color: #fff; text-shadow: none; }
.monogram-chev { width: .58em; height: .48em; margin-left: .14em; color: #cc00cc; flex: none; }
.cover .org { position: absolute; left: 12px; top: 12px; z-index: 2; background: rgba(28, 26, 28, .72); color: #fff; border-color: rgba(255, 255, 255, .14); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.cover-chip { position: absolute; left: 12px; top: 12px; z-index: 2; padding: .34rem .55rem; border-radius: 4px; background: #cc00cc; color: #fff; font: 700 .7rem/1 var(--font); letter-spacing: .01em; box-shadow: 0 6px 16px -8px rgba(0, 0, 0, .6); }
.cover-chip.is-done { background: #fff800; color: #1c1a1c; }
.cover-chip.is-info { background: rgba(28, 26, 28, .86); color: #fff; box-shadow: inset 0 0 0 1.5px #ff47ff; }
.cover-chip.is-muted { background: rgba(28, 26, 28, .86); color: #f0f0f0; }

/* empty-state art: brand chevrons settle in once (no endless float) */
.empty-art .ea-c3 { fill: none; stroke: var(--brand); opacity: .55; }
.empty-art .ea-c1 { fill: var(--brand-fill); opacity: .95; }
.empty-art .ea-chev { animation: eaIn .9s var(--ease) .15s backwards; }
.empty-art .ea-c1 { animation-delay: .3s; }
@keyframes eaIn { from { opacity: 0; transform: translateX(-8px); } }
.empty { animation: rvIn .6s var(--ease-out-soft) backwards; }

/* skeleton: brand-tinted shimmer */
.skel { background: linear-gradient(90deg, var(--bg-sunken) 0%, color-mix(in srgb, var(--brand) 7%, var(--bg-hover)) 45%, var(--bg-sunken) 80%) 0 0 / 200% 100%; }

/* confetti: add brand swooshes */
.burst i.sw { width: 18px; height: 18px; background: none; border: 3px solid var(--c); border-color: var(--c) transparent transparent transparent; border-radius: 50%; }

/* celebration card (brand book "I've just completed …" template) */
.celebration { position: relative; isolation: isolate; overflow: hidden; display: grid; justify-items: center; gap: .55rem; text-align: center; margin-bottom: 1.25rem;
  padding: clamp(1.75rem, 1.2rem + 3vw, 3.25rem) clamp(1.25rem, 1rem + 2vw, 2.75rem) 4rem; border-radius: var(--radius-l); background: #1c1a1c; color: #fff;
  box-shadow: 0 30px 70px -36px rgba(60, 0, 60, .85), inset 0 0 0 1px rgba(255, 255, 255, .06); animation: celIn .8s var(--ease) backwards; }
.celebration::before { content: ""; position: absolute; inset: 0; z-index: -2; background: radial-gradient(70% 90% at 0% 0%, rgba(204, 0, 204, .3), transparent 60%), radial-gradient(60% 80% at 100% 100%, rgba(70, 0, 204, .26), transparent 62%); }
.cel-art { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; pointer-events: none; }
.cel-swoosh { stroke: #660066; opacity: .5; stroke-dasharray: 1; animation: lineDraw 1.6s var(--ease) .35s backwards; }
.cel-bits > * { fill: none; stroke-width: 3; stroke-linecap: round; animation: fadeIn .8s ease .7s backwards; }
.cel-bits > :nth-child(5n + 1) { stroke: #cc00cc; } .cel-bits > :nth-child(5n + 2) { stroke: #ff47ff; } .cel-bits > :nth-child(5n + 3) { stroke: #cc0052; }
.cel-bits > :nth-child(5n + 4) { stroke: #4600cc; } .cel-bits > :nth-child(5n) { stroke: #fff800; }
.cel-bits circle { fill: #ff47ff; stroke: none; }
.cel-medal { width: 64px; height: 64px; border-radius: 20px; display: grid; place-items: center; color: #fff; background: var(--grad); box-shadow: 0 14px 30px -12px rgba(204, 0, 204, .9), inset 0 1px 0 rgba(255, 255, 255, .3); animation: celMedal .9s var(--ease-spring) .25s backwards; margin-bottom: .35rem; }
.cel-k { margin: 0; font: 700 .72rem/1.2 var(--font); letter-spacing: .14em; text-transform: uppercase; color: #ff47ff; }
.celebration h2 { margin: 0; color: #fff; font-weight: 500; font-size: clamp(1rem, .95rem + .4vw, 1.2rem); line-height: 1.4; max-width: 34ch; }
.cel-title { display: block; margin: .3rem 0; color: #ff47ff; font-weight: 800; font-size: clamp(1.55rem, 1.15rem + 1.9vw, 2.5rem); letter-spacing: -.03em; line-height: 1.08; overflow-wrap: anywhere; }
.cel-text { margin: .2rem 0 0; color: rgba(255, 255, 255, .8); max-width: 52ch; }
.cel-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .6rem; margin-top: .75rem; }
.celebration .btn-grad { background: #fff800; color: #1c1a1c; text-shadow: none; box-shadow: 0 10px 24px -12px rgba(255, 248, 0, .55); }
.btn-accent-outline { background: transparent; color: #fff800; border: 1.5px solid #fff800; }
.btn-accent-outline:hover { background: rgba(255, 248, 0, .1); }
.cel-logo { position: absolute; left: clamp(1rem, 3%, 1.75rem); bottom: 1.2rem; height: 16px; width: auto; }
.celebration :focus-visible { outline-color: #fff; }
@keyframes celIn { from { opacity: 0; transform: translateY(10px) scale(.985); } }
@keyframes celMedal { from { opacity: 0; transform: scale(.4) rotate(-20deg); } }

/* client co-branding in the top bar */
.cobrand { display: inline-flex; align-items: center; gap: .55rem; padding-left: .2rem; }
.cobrand-x { color: var(--ink-4); font-weight: 300; }
.cobrand img { width: 28px; height: 28px; border-radius: 8px; object-fit: contain; background: #fff; box-shadow: inset 0 0 0 1px var(--line); }

/* view transitions: the lesson column glides, chrome stays put */
.unit { view-transition-name: unit; }
::view-transition-old(unit) { animation: vtOut 140ms ease both; }
::view-transition-new(unit) { animation: vtIn 320ms var(--ease) both; }

@media (prefers-reduced-motion: reduce) {
  html.rv :is(.lx-cgrid, .stats, .lx-outline, .lx-side, .lx-updates, .cols-2, .rv-group) > * { opacity: 1; }
  .auth-art .chev-field { animation: none; }
}
@media (max-width: 640px) { .hero::after, .lx-chero::after { right: -22px; width: 88px; opacity: .28; } }
@media print { html.rv :is(.lx-cgrid, .stats, .lx-outline, .lx-side, .lx-updates, .cols-2, .rv-group) > * { opacity: 1 !important; animation: none !important; } }