/* ─── talkup design tokens ─────────────────────────── */
:root {
  /* Light (default) — fresh learning green, professional */
  --bg: #F6F4EE;            /* warm off-white (paper) */
  --bg-2: #FFFFFF;          /* card surface */
  --bg-3: #EDEAE0;          /* subtle inset / muted */
  --ink: #0E1A14;           /* near-black with green hint */
  --ink-2: #2E3B33;
  --ink-3: #5C6B61;
  --ink-4: #8B978E;
  --line: #DCD9CE;
  --line-2: #E8E5D9;

  --green: #2F6B4A;         /* primary forest */
  --green-2: #245A3D;       /* hover */
  --green-3: #C9E0CF;       /* tint, highlight bg */
  --green-4: #EAF3EC;       /* lightest tint */
  --gold: #C28B2C;          /* secondary accent (highlight) */
  --gold-2: #F5E7C2;
  --red: #B0432C;

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 0 rgba(14,26,20,.04), 0 1px 2px rgba(14,26,20,.04);
  --shadow: 0 1px 0 rgba(14,26,20,.04), 0 8px 24px -8px rgba(14,26,20,.12);
  --shadow-lg: 0 1px 0 rgba(14,26,20,.04), 0 24px 60px -20px rgba(14,26,20,.22);

  --serif: "Newsreader", "Source Serif 4", Georgia, serif;
  --sans: "Geist", "Manrope", ui-sans-serif, system-ui, sans-serif;
  --mono: "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
}

[data-theme="dark"] {
  --bg: #0C1411;
  --bg-2: #131C17;
  --bg-3: #1B2620;
  --ink: #ECEFE9;
  --ink-2: #C9D2CC;
  --ink-3: #94A39B;
  --ink-4: #6B7872;
  --line: #243029;
  --line-2: #1B2620;

  --green: #6DB48C;
  --green-2: #87C5A4;
  --green-3: #1F3327;
  --green-4: #182621;
  --gold: #D9B36A;
  --gold-2: #3A2F19;
  --red: #E07A60;

  --shadow-sm: 0 1px 0 rgba(0,0,0,.4);
  --shadow: 0 8px 24px -8px rgba(0,0,0,.5);
  --shadow-lg: 0 24px 60px -20px rgba(0,0,0,.6);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "ss02", "cv11";
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* Typography */
.display {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.04;
  color: var(--ink);
}
.eyebrow {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}
.muted { color: var(--ink-3); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 44px; padding: 0 18px;
  border-radius: 999px;
  font-weight: 500; font-size: 14.5px;
  border: 1px solid transparent;
  background: transparent; color: var(--ink);
  transition: background .15s, transform .08s, border-color .15s, color .15s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--green); color: #FFFEF6;
  box-shadow: inset 0 -1px 0 rgba(0,0,0,.18), 0 1px 0 rgba(255,255,255,.12) inset;
}
.btn-primary:hover { background: var(--green-2); }
.btn-ghost { color: var(--ink-2); }
.btn-ghost:hover { background: var(--bg-3); }
.btn-outline { border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink-3); }
.btn-sm { height: 36px; padding: 0 14px; font-size: 13.5px; }
.btn-lg { height: 52px; padding: 0 22px; font-size: 15.5px; }

/* Cards */
.card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; padding: 0 32px;
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { width: 100%; max-width: 1280px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 14px; border-radius: 999px;
  font-size: 14px; color: var(--ink-2); font-weight: 500;
}
.nav-link:hover { background: var(--bg-3); color: var(--ink); }
.nav-link.is-active { background: var(--bg-3); color: var(--ink); }

/* Logo */
.logo {
  font-family: var(--serif);
  font-size: 22px; letter-spacing: -0.01em;
  color: var(--ink); font-weight: 500;
  display: inline-flex; align-items: center; gap: 8px;
}
.logo-mark {
  width: 26px; height: 26px; border-radius: 8px;
  background: var(--green);
  display: inline-grid; place-items: center;
  color: #FFFEF6; font-family: var(--sans); font-weight: 600; font-size: 13px;
  letter-spacing: 0;
}

/* Section */
.section { padding: 96px 32px; }
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; }
.wrap-narrow { max-width: 920px; margin: 0 auto; }

/* Inputs */
.field { display: flex; flex-direction: column; gap: 6px; }
.label { font-size: 13px; color: var(--ink-3); font-weight: 500; }
.input {
  height: 48px; padding: 0 14px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink); font-size: 15px; font-family: var(--sans);
  outline: none; transition: border-color .15s, box-shadow .15s;
}
.input:focus { border-color: var(--green); box-shadow: 0 0 0 3px color-mix(in oklab, var(--green) 18%, transparent); }

/* Scene card */
.scene-card {
  display: block;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: all 0.15s;
}
.scene-card:hover {
  border-color: var(--green);
  background: color-mix(in oklab, var(--green) 6%, var(--bg-2));
}
.scene-card.featured {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border-color: transparent;
}

/* Tag / chip */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px; padding: 0 10px;
  border-radius: 999px;
  background: var(--bg-3); color: var(--ink-2);
  font-size: 12px; font-weight: 500;
  border: 1px solid var(--line);
}
.chip-green { background: var(--green-4); color: var(--green); border-color: color-mix(in oklab, var(--green) 22%, transparent); }
.chip-gold  { background: var(--gold-2); color: var(--gold); border-color: color-mix(in oklab, var(--gold) 22%, transparent); }

/* Divider */
.hr { height: 1px; background: var(--line); border: 0; margin: 0; }

/* Utility */
.row { display: flex; }
.col { display: flex; flex-direction: column; }
.center { display: flex; align-items: center; justify-content: center; }
.grow { flex: 1; }

/* Footer */
.foot { padding: 56px 32px 40px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 13px; }
.foot a:hover { color: var(--ink); }

/* ── Responsive ─────────────────────────── */
@media (max-width: 768px) {
  .nav-inner { padding: 0 16px; }
  .nav-links { display: none; }
  .section { padding: 56px 16px; }
  .wrap { padding: 0 16px; }
  .display { font-size: 36px !important; }
  h1.display { font-size: 42px !important; }
  .hero-grid { grid-template-columns: 1fr !important; gap: 32px !important; }
  .hero-img { display: none; }
  .scenes-grid { grid-template-columns: 1fr !important; }
  .scene-card { padding: 16px !important; }
  .foot { grid-template-columns: 1fr !important; gap: 24px !important; padding: 40px 16px 32px !important; }
  .profile-grid { grid-template-columns: 1fr !important; }
  .calendar-grid { grid-template-columns: repeat(7, 1fr) !important; gap: 4px !important; }
  .dialogue-item { padding: 12px 10px !important; }
  .dialogue-item .speaker { font-size: 11px !important; }
  .dialogue-item .en { font-size: 14px !important; }
  .dialogue-item .zh { font-size: 12px !important; }
}

@media (max-width: 480px) {
  .btn-lg { height: 44px !important; font-size: 14px !important; }
  .chip { font-size: 11px !important; padding: 3px 8px !important; }
}

/* ── Additional Mobile: Auth ─────────────────── */
@media (max-width: 768px) {
  main[style*='gridTemplateColumns'] section,
  [style*='1fr 1.1fr'] section {
    padding: 32px 20px !important;
  }
  [style*='1fr 1.1fr'] aside {
    display: none !important;
  }
  [style*='1fr 1.1fr'] {
    grid-template-columns: 1fr !important;
  }
  [style*='1fr 1.1fr'] > section {
    padding: 32px 20px !important;
  }
}

/* ── Additional Mobile: Detail ──────────────── */
@media (max-width: 768px) {
  main[style*='1fr 320px'] {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }
  main[style*='32px 32px 80px'] {
    padding: 20px 16px 60px !important;
  }
  .detail-sidebar {
    position: static !important;
    width: 100% !important;
  }
}

/* ── Additional Mobile: Scenarios ───────────── */
@media (max-width: 768px) {
  [style*='width:320'] {
    width: 100% !important;
  }
  [style*='gridTemplateColumns:repeat(auto-fill, minmax(280px, 1fr))'] {
    grid-template-columns: 1fr !important;
  }
}

/* ── Mobile Nav hamburger ──────────────────── */
@media (max-width: 768px) {
  .nav-inner .nav-links { display: none; }
  .nav-inner { position: relative; }
  .nav-mobile-btn { display: flex !important; }
}

/* ── Nav mobile menu ────────────────────────── */
.nav-mobile-btn { display: none; }
@media (max-width: 768px) {
  .nav-inner > nav.nav-links { display: none; }
  .nav-mobile-btn { display: flex !important; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 8px; background: var(--bg-2); border: none; cursor: pointer; font-size: 18px; color: var(--ink); }
  header.nav { position: sticky; top: 0; z-index: 100; background: var(--bg); }
}
/* ── Mobile Fixes v2 ─────────────────────── */
@media (max-width: 768px) {
  /* Profile */
  main.wrap[style*="56px 32px 96px"] { padding: 24px 16px 60px !important; }
  [style*="fontSize:44"] { font-size: 32px !important; }
  [style*="fontSize:36"] { font-size: 26px !important; }
  [style*="fontSize:60"] { font-size: 40px !important; }
  [style*="padding:24px 26px"] { padding: 16px !important; }

  /* Calendar */
  [style*="56px 32px 96px"][class*="wrap"] { padding: 24px 16px 60px !important; }
  [style*="fontSize:54"] { font-size: 36px !important; }
  [style*="fontSize:32"] { font-size: 24px !important; }
  [style*="fontSize:24"] { font-size: 20px !important; }

  /* Auth page - hide left panel, full width form */
  [style*="grid-template-columns: 1fr 1.1fr"] {
    grid-template-columns: 1fr !important;
  }
  [style*="grid-template-columns: 1fr 1.1fr"] aside {
    display: none !important;
  }
  [style*="grid-template-columns: 1fr 1.1fr"] section {
    padding: 32px 20px !important;
  }

  /* Detail page - stack layout */
  [style*="grid-template-columns: 1fr 320px"] {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }
  [style*="32px 32px 80px"] { padding: 16px 16px 60px !important; }
  [style*="fontSize:42"] { font-size: 28px !important; }
  [style*="fontSize:28"] { font-size: 22px !important; }
  [style*="fontSize:24"] { font-size: 18px !important; }

  /* Scenarios - search full width */
  [style*="width:320"] { width: 100% !important; }
  [style*="padding-left:38"] { padding-left: 38px !important; }
}

@media (max-width: 480px) {
  /* Shared small screen fixes */
  [style*="fontSize:44"] { font-size: 28px !important; }
  [style*="fontSize:42"] { font-size: 24px !important; }
  [style*="fontSize:54"] { font-size: 32px !important; }
  [style*="padding:56px"] { padding: 32px 16px !important; }
  [style*="padding:56px 56px"] { padding: 32px 16px !important; }
  [style*="padding:56px 32px"] { padding: 24px 16px !important; }
  .card { padding: 16px !important; }
  .btn-lg { height: 44px !important; padding: 0 16px !important; }
}

/* Landing page mobile */
@media (max-width: 768px) {
  [style*="1.05fr 1fr"] { grid-template-columns: 1fr !important; gap: 32px !important; }
  [style*="1.05fr 1fr"] > div:last-child { display: none; }
  [style*="1.2fr 1fr"] { grid-template-columns: 1fr !important; gap: 24px !important; }
}
@media (max-width: 480px) {
  [style*="repeat(4, 1fr)"] { grid-template-columns: repeat(2, 1fr) !important; }
}
@media (max-width: 360px) {
  [style*="repeat(4, 1fr)"] { grid-template-columns: 1fr !important; }
}