/* KaKa SQA — Atelier design system v1
   ---------------------------------------------------------
   Quiet authority. Editorial calm. Built for students and parents.
   Serif headings (Newsreader) + clean body (Inter) + Noto SC for Chinese.
   --------------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:opsz,wght@6..72,400;6..72,500;6..72,600;6..72,700&family=Inter:wght@400;500;600&family=Noto+Serif+SC:wght@500;600&family=Noto+Sans+SC:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- Tokens ---------- */
:root {
  /* Paper & ink (warm, editorial) */
  --bg:           #faf8f3;
  --bg-elevated:  #ffffff;
  --bg-tint:      #f1ede2;
  --bg-deep:      #efebde;
  --ink:          #1a1814;
  --ink-soft:     #3a352d;
  --muted:        #76706a;
  --line:         #e3ddcd;
  --line-soft:    #ece6d6;

  /* One quiet accent — Oxford navy */
  --accent:       #1e3a5f;
  --accent-hover: #2d4a72;
  --accent-soft:  #e3e8ef;

  /* Reserved warm — only for stamps & critical alerts */
  --terracotta:        #b85c3a;
  --terracotta-soft:   #f4e2d8;

  /* Semantic */
  --success:      #356b3f;
  --warn:         #a96316;
  --danger:       #a7261a;

  /* Type */
  --font-serif:   "Newsreader", "Source Serif 4", "Noto Serif SC",
                  "Songti SC", ui-serif, Georgia, serif;
  --font-sans:    -apple-system, BlinkMacSystemFont, "Inter",
                  "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, SFMono-Regular,
                  "SF Mono", Menlo, Consolas, monospace;

  /* Layout */
  --container:        min(1200px, calc(100% - 48px));
  --container-narrow: min(720px, calc(100% - 48px));
  --container-prose:  min(640px, calc(100% - 40px));

  /* Radii (modest) */
  --radius-sm:   6px;
  --radius:      10px;
  --radius-lg:   16px;
  --radius-pill: 999px;

  /* Shadows (faint, warm) */
  --shadow-sm: 0 1px 2px rgba(28,20,8,0.04);
  --shadow:    0 4px 24px rgba(28,20,8,0.06), 0 0 0 1px rgba(28,20,8,0.03);
  --shadow-lg: 0 24px 60px rgba(28,20,8,0.10), 0 0 0 1px rgba(28,20,8,0.04);

  /* Motion */
  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --ease-slow:  cubic-bezier(0.16, 1, 0.3, 1);

  /* Nav (liquid glass — multi-layer refraction simulation) */
  --nav-bg:        rgba(250,248,243,0.42);
  --nav-bg-edge:   rgba(250,248,243,0.66);
  --nav-border:    rgba(28,20,8,0.10);
  --nav-glow:      linear-gradient(180deg, rgba(255,255,255,0.85) 0%, rgba(255,255,255,0.20) 40%, transparent 100%);
  --glass-inset:   inset 0 1px 0 rgba(255,255,255,0.55), inset 0 -1px 0 rgba(255,255,255,0.10);
  --glass-shadow:  0 1px 0 rgba(255,255,255,0.06), 0 8px 24px rgba(28,20,8,0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:           #14130f;
    --bg-elevated:  #1c1a16;
    --bg-tint:      #1f1c17;
    --bg-deep:      #211e18;
    --ink:          #f0ead9;
    --ink-soft:     #d3ccba;
    --muted:        #8a847a;
    --line:         #2a2620;
    --line-soft:    #1f1c17;

    --accent:       #7da8d6;
    --accent-hover: #98bce0;
    --accent-soft:  rgba(125,168,214,0.10);

    --terracotta:        #d97c5c;
    --terracotta-soft:   rgba(217,124,92,0.12);

    --success:      #6db26d;
    --warn:         #d49a4d;
    --danger:       #e08070;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.30);
    --shadow:    0 4px 24px rgba(0,0,0,0.40);
    --shadow-lg: 0 24px 60px rgba(0,0,0,0.55);

    --nav-bg:        rgba(20,19,15,0.40);
    --nav-bg-edge:   rgba(20,19,15,0.62);
    --nav-border:    rgba(255,255,255,0.12);
    --nav-glow:      linear-gradient(180deg, rgba(255,255,255,0.10) 0%, rgba(255,255,255,0.02) 40%, transparent 100%);
    --glass-inset:   inset 0 1px 0 rgba(255,255,255,0.10), inset 0 -1px 0 rgba(255,255,255,0.04);
    --glass-shadow:  0 1px 0 rgba(255,255,255,0.05), 0 12px 32px rgba(0,0,0,0.36);
  }
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  font-feature-settings: "kern", "liga", "clig";
  min-height: 100vh;
  /* Subtle paper grain */
  background-image:
    radial-gradient(circle at 20% 10%, rgba(184,92,58,0.03), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(30,58,95,0.02), transparent 50%);
}

img, svg, video { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: none; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

::selection { background: var(--accent); color: var(--bg); }

/* ---------- Typography scale ---------- */
.display-1 {
  font-family: var(--font-serif);
  font-size: clamp(44px, 7.8vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  font-weight: 500;
  color: var(--ink);
}
.display-2 {
  font-family: var(--font-serif);
  font-size: clamp(36px, 5.5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 500;
}
.headline {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  font-weight: 500;
}
.title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.4vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 500;
}
.subtitle {
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.5;
  color: var(--ink-soft);
  font-weight: 400;
}
.body { font-size: 17px; line-height: 1.6; color: var(--ink-soft); }
.caption {
  font-size: 13px;
  line-height: 1.45;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.eyebrow + .display-1,
.eyebrow + .display-2,
.eyebrow + .headline,
.eyebrow + .title,
.eyebrow + h1,
.eyebrow + h2,
.eyebrow + h3 {
  margin-top: 0;
}
.eyebrow .roman {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
  margin-right: 8px;
  color: var(--accent);
}

.serif  { font-family: var(--font-serif); }
.mono   { font-family: var(--font-mono); }
.italic { font-style: italic; }

/* ---------- Layout primitives ---------- */
.container        { width: var(--container);        margin-inline: auto; }
.container-narrow { width: var(--container-narrow); margin-inline: auto; }
.container-prose  { width: var(--container-prose);  margin-inline: auto; }

.section {
  padding-block: clamp(48px, 6vw, 84px);
}
.section + .section {
  border-top: 1px solid var(--line-soft);
}
.section-tight { padding-block: clamp(36px, 4.5vw, 60px); }
.section-loose { padding-block: clamp(72px, 10vw, 140px); }

.grid { display: grid; gap: 24px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 880px) {
  .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; }
}

.stack-sm > * + * { margin-top: 12px; }
.stack    > * + * { margin-top: 20px; }
.stack-lg > * + * { margin-top: 36px; }
.stack-xl > * + * { margin-top: 60px; }

/* ---------- Top navigation (liquid glass — multi-layer) ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  /* Layered: subtle radial highlight + horizontal edge tint + base tint */
  background:
    radial-gradient(180% 120% at 50% -40%, rgba(255,255,255,0.45) 0%, transparent 55%),
    linear-gradient(90deg, var(--nav-bg-edge) 0%, var(--nav-bg) 50%, var(--nav-bg-edge) 100%);
  -webkit-backdrop-filter: saturate(240%) blur(36px);
          backdrop-filter: saturate(240%) blur(36px);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: var(--glass-inset), var(--glass-shadow);
  isolation: isolate;
  transition: backdrop-filter .3s var(--ease);
}
.site-nav::before {
  /* Crystalline top-edge highlight (the lit "rim" of glass) */
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 70%;
  background: var(--nav-glow);
  pointer-events: none;
  z-index: -1;
  opacity: 0.9;
}
.site-nav::after {
  /* Diffuse refraction shadow under the bar */
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 8px;
  background: linear-gradient(180deg, rgba(28,20,8,0.05), transparent);
  pointer-events: none;
}
@media (prefers-color-scheme: dark) {
  .site-nav {
    background:
      radial-gradient(180% 120% at 50% -40%, rgba(255,255,255,0.10) 0%, transparent 55%),
      linear-gradient(90deg, var(--nav-bg-edge) 0%, var(--nav-bg) 50%, var(--nav-bg-edge) 100%);
  }
  .site-nav::after {
    background: linear-gradient(180deg, rgba(0,0,0,0.30), transparent);
  }
}
.site-nav .inner {
  width: var(--container);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 24px;
}
.site-nav .brand {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.site-nav .brand .dot {
  display: inline-block;
  width: 5px; height: 5px;
  margin-left: 6px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 4px;
}
.site-nav .links {
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
}
.site-nav .links a { transition: color .25s var(--ease); }
.site-nav .links a:hover { color: var(--ink); }
.site-nav .right { display: flex; gap: 14px; align-items: center; }

@media (max-width: 720px) {
  .site-nav .inner { height: 56px; gap: 12px; }
  .site-nav .links {
    display: flex;
    gap: 18px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    flex: 1;
    font-size: 13px;
  }
  .site-nav .links::-webkit-scrollbar { display: none; }
  .site-nav .links a { white-space: nowrap; }
  .site-nav .brand { font-size: 18px; }
  .site-nav .right { display: none; }
}

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: all .3s var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover {
  border-color: var(--ink);
  background: var(--bg-tint);
}
.btn-arrow::after {
  content: "→";
  transition: transform .3s var(--ease);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* Quiet inline link with grow underline */
.link {
  position: relative;
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
}
.link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .4s var(--ease-slow);
}
.link:hover::after { transform: scaleX(1); }

/* Ghost text-only link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-weight: 500;
  font-size: 15px;
  transition: gap .3s var(--ease);
}
.link-arrow::after {
  content: "→";
  transition: transform .3s var(--ease);
  color: var(--accent);
}
.link-arrow:hover { gap: 10px; }
.link-arrow:hover::after { transform: translateX(2px); }

/* ---------- Form controls ---------- */
.field { display: block; }
.field + .field { margin-top: 18px; }
.field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.field textarea { height: auto; min-height: 96px; padding: 12px 16px; resize: vertical; }
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-elevated);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.field input::placeholder { color: var(--muted); }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 3vw, 36px);
  transition: border-color .3s var(--ease), transform .3s var(--ease), box-shadow .3s var(--ease);
}
.card:hover {
  border-color: var(--line);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.card.compact { padding: 20px 22px; }
.card.no-hover:hover { transform: none; box-shadow: none; border-color: var(--line-soft); }

/* Index card — like a library catalogue card */
.index-card {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 28px 28px 28px 28px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  transition: all .35s var(--ease-slow);
}
.index-card:hover {
  border-color: var(--ink);
  transform: translateX(2px);
}
.index-card .num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 24px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.index-card h3 {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}
.index-card p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.5;
}
.index-card .arrow {
  font-size: 18px;
  color: var(--accent);
  transition: transform .3s var(--ease);
}
.index-card:hover .arrow { transform: translateX(4px); }

@media (max-width: 640px) {
  .index-card { grid-template-columns: 40px 1fr; padding: 22px 20px; gap: 16px; }
  .index-card .arrow { display: none; }
  .index-card .num { font-size: 20px; }
}

/* ---------- Stamp / badge ---------- */
.stamp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 4px;
  border: 1.5px solid var(--terracotta);
  color: var(--terracotta);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--terracotta-soft);
}
.stamp.navy {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.stamp.muted {
  border-color: var(--line);
  color: var(--muted);
  background: transparent;
}

/* ---------- Stat row ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.stat .num {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1;
}
.stat .lab {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- Inverse section (dark on light page) ---------- */
.inverse {
  background: #14130f;
  color: #f0ead9;
}
.inverse .display-1,
.inverse .display-2,
.inverse .headline,
.inverse .title { color: #f0ead9; }
.inverse .subtitle, .inverse .body { color: #d3ccba; }
.inverse .caption, .inverse .eyebrow { color: #8a847a; }
.inverse .eyebrow .roman { color: #7da8d6; }
.inverse .link { color: #98bce0; }
.inverse .btn-primary { background: #f0ead9; color: #14130f; }
.inverse .btn-primary:hover { background: #ffffff; }
.inverse .btn-ghost { color: #f0ead9; border-color: rgba(240,234,217,0.3); }
.inverse .btn-ghost:hover { border-color: #f0ead9; background: rgba(255,255,255,0.06); }
.inverse .stamp.navy { color: #98bce0; border-color: #98bce0; background: rgba(125,168,214,0.10); }
.inverse hr, .inverse .rule { background: rgba(240,234,217,0.15); }
.inverse .stat .num { color: #f0ead9; }
.inverse .stat .lab { color: #8a847a; }

/* ---------- Rule ---------- */
.rule {
  height: 1px;
  background: var(--line);
  border: none;
  margin-block: 32px;
}
.rule.short { width: 60px; height: 2px; background: var(--ink); }

/* ---------- Footer ---------- */
.site-foot {
  padding: 56px 0 48px;
  border-top: 1px solid var(--line-soft);
  font-size: 13.5px;
  color: var(--muted);
}
.site-foot .inner {
  width: var(--container);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  justify-content: space-between;
  align-items: baseline;
}
.site-foot a { color: var(--muted); transition: color .2s var(--ease); }
.site-foot a:hover { color: var(--ink); }
.site-foot .brand-mark {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--ink);
  font-weight: 500;
}

/* ---------- Reveal-on-scroll (preserves existing .reveal logic) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .9s var(--ease-slow), transform .9s var(--ease-slow);
  will-change: opacity, transform;
}
.reveal.shown {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Inline message (for forms) ---------- */
.msg {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.5;
  min-height: 1.5em;
}
.msg.err { color: var(--danger); }
.msg.ok  { color: var(--success); }

/* ---------- Hero specific ---------- */
.hero {
  padding-block: clamp(72px, 14vw, 180px) clamp(56px, 8vw, 100px);
  position: relative;
}
.hero .eyebrow { margin-bottom: 28px; }
.hero h1 { margin: 0 0 28px; max-width: 14ch; }
.hero .lead {
  max-width: 36ch;
  margin: 0 0 44px;
}
.hero .actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.hero .meta-line {
  margin-top: 80px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  font-family: var(--font-mono);
}
.hero .meta-line .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--success);
  display: inline-block;
  margin-right: 8px;
  vertical-align: 1px;
  box-shadow: 0 0 0 4px rgba(53,107,63,0.18);
}

/* ---------- Pull-quote ---------- */
.pull-quote {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.3;
  letter-spacing: -0.015em;
  font-weight: 500;
  color: var(--ink);
  border-left: 2px solid var(--ink);
  padding-left: clamp(20px, 3vw, 36px);
  font-style: italic;
}
.pull-quote cite {
  display: block;
  margin-top: 18px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-style: normal;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- Privacy block specific ---------- */
.commit-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: grid;
  gap: 14px;
}
.commit-list li {
  position: relative;
  padding-left: 28px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.commit-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 600;
}
.inverse .commit-list li { color: #d3ccba; }
.inverse .commit-list li::before { color: #98bce0; }

/* ---------- Top nav (signed-in pages, emitted by topnav.js) ---------- */
.site-nav .links a {
  position: relative;
  padding: 6px 0;
  transition: color .25s var(--ease);
}
.site-nav .links a.active { color: var(--accent); font-weight: 600; }
.site-nav .links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1.5px;
  background: var(--accent);
}
.site-nav .links a.staff-only { color: var(--terracotta); }
.site-nav .links a.staff-only:hover { color: var(--terracotta); opacity: 0.85; }
.site-nav .links a.staff-only.active::after { background: var(--terracotta); }
.site-nav .links a.admin-only {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  color: var(--success);
  background: rgba(53,107,63,0.08);
  border: 1px solid rgba(53,107,63,0.18);
}
.site-nav .links a[hidden] { display: none !important; }
.site-nav .who {
  font-size: 12.5px;
  color: var(--muted);
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-mono);
}
.btn-text-small {
  font-size: 13px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: var(--radius);
  transition: all .2s var(--ease);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
}
.btn-text-small:hover { color: var(--ink); border-color: var(--ink); }

@media (max-width: 720px) {
  .site-nav .who { display: none; }
  .site-nav #logout { font-size: 12px; padding: 4px 8px; }
}

/* ---------- Page chrome ---------- */
.hidden { display: none !important; }
.boot-screen {
  display: grid;
  place-items: center;
  min-height: 60vh;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.page-shell {
  width: var(--container);
  margin-inline: auto;
  padding-block: clamp(40px, 6vw, 72px);
}
.page-shell.narrow { width: var(--container-narrow); }
.page-head {
  margin-bottom: clamp(28px, 4vw, 44px);
}
.page-head .meta-row {
  display: flex;
  gap: 12px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}
.page-head .eyebrow { margin-bottom: 8px; }
.page-head h1 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.018em;
  font-weight: 500;
  margin: 0 0 12px;
  color: var(--ink);
}
.page-head .lead { margin-top: 0; }
.page-head .lead {
  font-size: clamp(17px, 1.5vw, 19px);
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0;
  line-height: 1.55;
}

/* ---------- Buttons (extended: small + variants) ---------- */
.btn.sm { height: 38px; padding: 0 16px; font-size: 14px; }
.btn.xs { height: 32px; padding: 0 12px; font-size: 13px; }
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.primary:hover { background: var(--accent); }
.btn.warm  { background: var(--terracotta); color: #fff; }
.btn.warm:hover { background: var(--terracotta); filter: brightness(0.95); }
.btn.danger { background: var(--danger); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.ghost:hover { border-color: var(--ink); background: var(--bg-tint); }

/* ---------- Chips (status / tags) ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  background: var(--bg-tint);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  white-space: nowrap;
}
.chip .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--muted);
}
.chip.accent { background: var(--accent-soft); border-color: rgba(30,58,95,0.18); color: var(--accent); }
.chip.accent .dot { background: var(--accent); }
.chip.warm   { background: var(--terracotta-soft); border-color: rgba(184,92,58,0.20); color: var(--terracotta); }
.chip.warm .dot { background: var(--terracotta); }
.chip.warn   { background: rgba(169,99,22,0.12); border-color: rgba(169,99,22,0.25); color: var(--warn); }
.chip.warn .dot { background: var(--warn); }
.chip.success{ background: rgba(53,107,63,0.10); border-color: rgba(53,107,63,0.22); color: var(--success); }
.chip.success .dot { background: var(--success); }
.chip.danger { background: rgba(167,38,26,0.10); border-color: rgba(167,38,26,0.22); color: var(--danger); }
.chip.muted  { background: transparent; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- Filter chip button ---------- */
.chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .2s var(--ease);
  white-space: nowrap;
}
.chip-btn:hover { border-color: var(--ink); color: var(--ink); }
.chip-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}

/* ---------- Progress bar ---------- */
.progress {
  --p: 0%;
  position: relative;
  height: 6px;
  background: var(--line-soft);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.progress > span {
  position: absolute;
  inset: 0;
  width: var(--p);
  background: linear-gradient(90deg, var(--accent), var(--terracotta));
  border-radius: var(--radius-pill);
  transition: width 1s var(--ease-slow);
}

/* ---------- Notice / empty ---------- */
.notice, .empty-state, .empty {
  padding: 18px 20px;
  border-radius: var(--radius);
  background: var(--bg-tint);
  border: 1px dashed var(--line);
  font-size: 14px;
  color: var(--muted);
  text-align: center;
}

/* ---------- Inputs (search) ---------- */
.search {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  transition: border-color .2s var(--ease);
  width: 100%;
  max-width: 360px;
}
.search:focus-within { border-color: var(--accent); }
.search input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
}
.search input::placeholder { color: var(--muted); }

/* ---------- Tabs ---------- */
.tab-bar {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-bar::-webkit-scrollbar { display: none; }
.tab-btn {
  position: relative;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s var(--ease);
}
.tab-btn:hover { color: var(--ink); }
.tab-btn.active { color: var(--accent); }
.tab-btn.active::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: -1px;
  height: 2px;
  background: var(--accent);
}

/* ---------- Tables ---------- */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.table th, .table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
}
.table th {
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--bg-tint);
}
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--bg-tint); }

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20,19,15,0.45);
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
}
.modal-backdrop.hidden { display: none; }
.modal {
  width: min(560px, 100%);
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  max-height: 85vh;
  overflow: auto;
}
.modal h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 500;
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

/* ---------- Dashboard-specific (rendered by data.js) ---------- */
.assignment-card {
  background: var(--bg-elevated);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 3vw, 40px);
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.assignment-card .head .chips { margin-bottom: 14px; }
.assignment-card h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 500;
  letter-spacing: -0.012em;
  line-height: 1.15;
  margin: 0;
}
.assignment-card .summary {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  margin: 0;
}
.meta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  background: var(--bg-tint);
  border-radius: var(--radius);
  padding: 18px;
}
.meta-grid > div .k {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.meta-grid > div .v {
  font-weight: 500;
  font-size: 15px;
  color: var(--ink);
  font-family: var(--font-serif);
}
@media (max-width: 720px) {
  .meta-grid { grid-template-columns: repeat(2, 1fr); }
}
.milestones {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.milestones .mile {
  padding: 16px;
  background: var(--bg-tint);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.milestones .mile .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.milestones .mile h4 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.005em;
}
.milestones .mile .status {
  font-size: 12px;
  color: var(--ink-soft);
}
@media (max-width: 720px) { .milestones { grid-template-columns: repeat(2, 1fr); } }

.activity-row {
  display: grid;
  grid-template-columns: 90px 100px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 14px;
}
.activity-row:last-child { border-bottom: none; }
.activity-row .d { color: var(--muted); font-family: var(--font-mono); font-size: 12.5px; }
.activity-row strong { font-weight: 500; color: var(--ink); }
.activity-row .note { font-size: 13px; color: var(--muted); margin-top: 2px; }
@media (max-width: 720px) {
  .activity-row { grid-template-columns: 1fr; gap: 6px; }
}

.multi-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 24px 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  transition: all .3s var(--ease);
}
.multi-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.multi-card h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  margin: 8px 0 6px;
  letter-spacing: -0.01em;
}
.multi-card .desc {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 14px;
  line-height: 1.5;
}
.multi-card .pct {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.multi-card .pct small { font-size: 16px; color: var(--muted); margin-left: 2px; }
.big-progress {
  font-family: var(--font-serif);
  font-size: 64px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.big-progress small { font-size: 24px; color: var(--muted); margin-left: 4px; }

/* ---------- Side rail / aside ---------- */
.rail-card {
  background: var(--bg-elevated);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.rail-card + .rail-card { margin-top: 16px; }

/* ---------- Tile (action entry) ---------- */
.tile {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 22px 26px;
  background: var(--bg-elevated);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: all .25s var(--ease);
}
.tile:hover { border-color: var(--ink); transform: translateX(2px); }
.tile h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  margin: 0 0 4px;
  letter-spacing: -0.005em;
}
.tile p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.5; }
.tile .arrow { font-size: 14px; color: var(--accent); white-space: nowrap; }

/* ---------- Boot loading ---------- */
#boot, #bootLoading {
  display: grid;
  place-items: center;
  min-height: 60vh;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

/* ---------- Mock-engine veil (anti-leak) ---------- */
.mock-veil {
  position: fixed;
  inset: 0;
  background: rgba(20,19,15,0.92);
  -webkit-backdrop-filter: blur(20px) saturate(120%);
          backdrop-filter: blur(20px) saturate(120%);
  z-index: 9999;
  display: none;
  place-items: center;
  padding: 24px;
}
.mock-veil.on { display: grid; }
.mock-veil-card {
  width: min(420px, 100%);
  padding: 36px 32px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  text-align: center;
}
.mock-veil-card strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 8px;
}
.mock-veil-card p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.5;
}

/* ---------- Legal banner (formal corporate-legal callout) ---------- */
.legal-banner {
  margin-bottom: clamp(28px, 4vw, 40px);
  padding: clamp(20px, 2.5vw, 28px) clamp(22px, 3vw, 32px);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-top: 3px solid var(--terracotta);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  box-shadow: var(--shadow-sm);
}
.legal-banner .icon {
  font-family: var(--font-serif);
  font-size: 26px;
  color: var(--terracotta);
  font-weight: 600;
  line-height: 1;
  margin-top: 2px;
}
.legal-banner strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 600;
  letter-spacing: -0.005em;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
}
.legal-banner p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.legal-banner ol {
  margin: 8px 0 0;
  padding-left: 22px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  counter-reset: legal;
  list-style: none;
}
.legal-banner ol li {
  counter-increment: legal;
  position: relative;
  padding-left: 14px;
  margin-bottom: 8px;
}
.legal-banner ol li::before {
  content: counter(legal) ".";
  position: absolute;
  left: -22px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--terracotta);
  font-weight: 500;
}
.legal-banner ol li:last-child { margin-bottom: 0; }
@media (max-width: 720px) {
  .legal-banner { grid-template-columns: 1fr; }
  .legal-banner .icon { display: none; }
}

/* ---------- Mobile drawer (nav-drawer.js · liquid glass) ---------- */
.nav-menu-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  padding: 0;
  margin-left: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.5);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
          backdrop-filter: blur(12px) saturate(180%);
  cursor: pointer;
  transition: all .25s var(--ease);
  z-index: 51;
}
.nav-menu-toggle:hover {
  border-color: var(--ink);
  background: rgba(255,255,255,0.7);
}
.nav-menu-toggle span {
  position: absolute;
  left: 11px; right: 11px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .3s var(--ease-slow), top .3s var(--ease-slow);
}
.nav-menu-toggle span:first-child { top: 14px; }
.nav-menu-toggle span:last-child  { top: 23px; }
@media (prefers-color-scheme: dark) {
  .nav-menu-toggle { background: rgba(28,26,22,0.5); }
  .nav-menu-toggle:hover { background: rgba(28,26,22,0.8); }
}
@media (max-width: 720px) {
  .nav-menu-toggle { display: block; }
  .site-nav .links { display: none; }
  .site-nav .right { display: none; }
}
body.drawer-open .nav-menu-toggle span:first-child { top: 18.5px; transform: rotate(45deg); }
body.drawer-open .nav-menu-toggle span:last-child  { top: 18.5px; transform: rotate(-45deg); }

.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20,19,15,0.30);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
          backdrop-filter: blur(20px) saturate(180%);
  z-index: 99;
  display: flex;
  justify-content: flex-end;
  animation: overlayIn .35s var(--ease) both;
}
.mobile-drawer-overlay[hidden] { display: none; }
@keyframes overlayIn { from { opacity: 0; } to { opacity: 1; } }

.mobile-drawer {
  width: min(380px, 92%);
  height: 100%;
  position: relative;
  /* Multi-layer glass: vertical surface + diagonal sheen */
  background:
    linear-gradient(135deg, rgba(255,255,255,0.20) 0%, transparent 40%),
    linear-gradient(180deg, rgba(255,255,255,0.62) 0%, rgba(250,248,243,0.78) 100%);
  -webkit-backdrop-filter: blur(48px) saturate(260%);
          backdrop-filter: blur(48px) saturate(260%);
  border-left: 1px solid rgba(255,255,255,0.45);
  box-shadow:
    inset 1px 0 0 rgba(255,255,255,0.65),
    inset 0 1px 0 rgba(255,255,255,0.35),
    -32px 0 80px rgba(28,20,8,0.22);
  padding: 28px 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: drawerIn .45s var(--ease-slow) both;
  isolation: isolate;
  overflow: hidden;
}
.mobile-drawer::before {
  /* Diagonal sheen — like light catching on a tilted glass surface */
  content: "";
  position: absolute;
  top: -10%; left: -10%; right: -10%;
  height: 60%;
  background:
    radial-gradient(80% 100% at 30% 20%, rgba(255,255,255,0.85) 0%, transparent 55%),
    radial-gradient(60% 80% at 80% 0%, rgba(255,255,255,0.50) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
  filter: blur(2px);
}
.mobile-drawer::after {
  /* Color bloom in lower corner — accent light source */
  content: "";
  position: absolute;
  bottom: -120px;
  left: -80px;
  width: 360px;
  height: 360px;
  background:
    radial-gradient(circle, rgba(30,58,95,0.16) 0%, transparent 55%),
    radial-gradient(circle at 60% 40%, rgba(184,92,58,0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}
@media (prefers-color-scheme: dark) {
  .mobile-drawer {
    background: linear-gradient(180deg, rgba(40,36,30,0.78) 0%, rgba(20,19,15,0.85) 100%);
    border-left: 1px solid rgba(255,255,255,0.10);
  }
  .mobile-drawer::before {
    background: radial-gradient(120% 120% at 50% 0%, rgba(255,255,255,0.10) 0%, transparent 60%);
  }
  .mobile-drawer::after {
    background: radial-gradient(circle, rgba(125,168,214,0.14) 0%, transparent 60%);
  }
}
@keyframes drawerIn {
  from { transform: translateX(40px); opacity: 0; }
  to   { transform: none; opacity: 1; }
}

.mobile-drawer-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  margin-bottom: 6px;
  border-bottom: 1px solid rgba(28,20,8,0.10);
}
.mobile-drawer-head strong {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.mobile-drawer-head span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  flex: 1;
}
.mobile-drawer-close {
  font-size: 22px;
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.55);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  cursor: pointer;
  line-height: 1;
  transition: all .2s var(--ease);
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
}
.mobile-drawer-close:hover {
  border-color: var(--ink);
  transform: scale(1.05);
}
.mobile-drawer-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 8px;
}
.mobile-drawer-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink);
  border-radius: var(--radius);
  text-align: left;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all .2s var(--ease);
  position: relative;
}
.mobile-drawer-link::before {
  content: "→";
  font-family: var(--font-sans);
  font-size: 16px;
  color: var(--muted);
  transition: transform .25s var(--ease), color .25s var(--ease);
  width: 16px;
  display: inline-block;
  text-align: center;
}
.mobile-drawer-link:hover {
  background: rgba(255,255,255,0.55);
  color: var(--accent);
}
.mobile-drawer-link:hover::before {
  color: var(--accent);
  transform: translateX(3px);
}
@media (prefers-color-scheme: dark) {
  .mobile-drawer-head { border-bottom-color: rgba(255,255,255,0.12); }
  .mobile-drawer-close { background: rgba(40,36,30,0.55); }
  .mobile-drawer-link:hover { background: rgba(255,255,255,0.05); }
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-muted  { color: var(--muted); }
.text-ink    { color: var(--ink); }
.text-accent { color: var(--accent); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.gap-sm { gap: 8px; }
.gap    { gap: 16px; }
.gap-lg { gap: 32px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.uppercase { text-transform: uppercase; letter-spacing: 0.08em; }
.hide-mobile { }
@media (max-width: 720px) { .hide-mobile { display: none !important; } }
.show-mobile { display: none !important; }
@media (max-width: 720px) { .show-mobile { display: block !important; } }