/* ODW.ai Strategic Readout — Website Styles */
/* Cleaned from Genspark slide deck theme.css */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Instrument+Serif:ital@0;1&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design Tokens ── */
:root {
  --ink: #14110F;
  --ink-2: #2A2622;
  --ink-3: #5A544E;
  --ink-4: #8A847C;
  --paper: #F6F2EC;
  --paper-2: #ECE6DC;
  --paper-3: #E2DBCE;
  --rule: #D6CFC0;
  --accent: #FF5A1F;
  --accent-2: #FFB199;
  --accent-soft: #FFE9DF;
  --accent-ink: #B23A0E;
  --good: #1F7A4D;
  --warn: #B58900;
  --nav-width: 220px;
}

/* ── Reset ── */
* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system,
    'PingFang SC', 'PingFang TC',
    'Microsoft YaHei', 'Microsoft JhengHei',
    'Noto Sans CJK SC', 'Noto Sans CJK TC',
    system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'ss01', 'cv11';
  line-height: 1.5;
}

/* ── Type Tokens ── */
.serif {
  font-family: 'Instrument Serif',
    'Songti SC', 'Songti TC',
    'SimSun', 'PMingLiU',
    'Noto Serif CJK SC', 'Noto Serif CJK TC',
    'Times New Roman', serif;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.mono {
  font-family: 'JetBrains Mono',
    'PingFang SC', 'PingFang TC',
    'Microsoft YaHei', 'Microsoft JhengHei',
    monospace;
}
.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 16px;
}
.eyebrow-ink {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}
.big-num {
  font-family: 'Instrument Serif', serif;
  line-height: 0.95;
  letter-spacing: -0.03em;
}
.source {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink-4);
  letter-spacing: 0.04em;
}

/* ── CJK typography overrides ── */
/* Tighten letter-spacing on eyebrows — Chinese typography uses minimal spacing. */
:root:lang(zh-CN) .eyebrow,
:root:lang(zh-HK) .eyebrow,
:root:lang(zh-CN) .eyebrow-ink,
:root:lang(zh-HK) .eyebrow-ink {
  letter-spacing: 0.04em;
}
/* CJK glyphs sit taller — give serif headings more vertical room. */
:root:lang(zh-CN) .serif,
:root:lang(zh-HK) .serif {
  line-height: 1.15;
}

/* ── Navigation Sidebar ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--ink);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 32px 0;
  overflow-y: auto;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  scrollbar-width: thin;
  scrollbar-color: var(--ink-3) transparent;
}

.nav::-webkit-scrollbar {
  width: 4px;
}

.nav::-webkit-scrollbar-track {
  background: transparent;
}

.nav::-webkit-scrollbar-thumb {
  background: var(--ink-3);
  border-radius: 2px;
}

.nav-brand {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--paper);
  letter-spacing: 0.18em;
  font-weight: 600;
  padding: 0 24px 24px;
  border-bottom: 1px solid var(--ink-3);
  margin-bottom: 16px;
  flex-shrink: 0;
}
.nav-brand .dot { color: var(--accent); }

.nav-links {
  list-style: none;
  flex: 1;
  padding: 8px 0;
}

.nav-links li a {
  display: block;
  padding: 10px 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-4);
  text-decoration: none;
  transition: all 0.2s ease;
  border-left: 2px solid transparent;
  position: relative;
}

.nav-links li a:hover {
  color: var(--paper);
  background: rgba(255,255,255,0.04);
  padding-left: 28px;
}

.nav-links li a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(255,90,31,0.08);
}

.nav-links li a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 16px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* ── Language Switcher (bottom of nav sidebar) ── */
.nav-lang {
  flex-shrink: 0;
  padding: 16px 24px 28px;
  border-top: 1px solid var(--ink-3);
  margin-top: auto;
}

.nav-lang-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 12px;
  font-weight: 500;
}

.nav-lang a {
  display: block;
  padding: 7px 0 7px 12px;
  margin-left: -12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-4);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-lang a:hover {
  color: var(--paper);
}

.nav-lang a.active {
  color: var(--accent);
  border-left-color: var(--accent);
}

/* ── Main Content ── */
.main {
  margin-left: var(--nav-width);
}

/* ── Slide Sections ── */
.slide-section {
  width: 100%;
  overflow: hidden;
  background: var(--paper);
}

.slide-section .slide-container {
  position: relative;
  width: 1920px;
  height: 1080px;
  overflow: hidden;
  background: var(--paper);
  transform-origin: top left;
}

/* Dark sections inherit their own bg */
.slide-section.slide-dark {
  background: var(--ink);
}

/* ── Section Dividers ── */
.section-divider {
  width: 100%;
  height: 1px;
  background: var(--rule);
}

/* ── Mobile Nav Toggle ── */
.nav-toggle {
  display: none;
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1001;
  width: 48px;
  height: 48px;
  background: var(--ink);
  border: 1px solid var(--ink-3);
  border-radius: 12px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.nav-toggle:hover {
  background: var(--ink-2);
  border-color: var(--accent);
  transform: scale(1.05);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--paper);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}
/* Hamburger to X animation */
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* Backdrop overlay when nav is open */
.nav-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.nav-backdrop.active {
  display: block;
  opacity: 1;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .nav {
    transform: translateX(-100%);
  }
  .nav.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,0.3);
  }
  .nav-toggle {
    display: flex;
  }
  .main {
    margin-left: 0;
  }
}