:root {
  --primary: #FF0048;
  --primary-dark: #A3063A;
  --accent: #FCDA01;
  --accent-light: #FDE85C;
  --bg: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8F8FA;
  --surface: #FAFAFA;
  --text: #111111;
  --text-muted: #555555;
  --text-dim: #777777;
  --border: rgba(0,0,0,0.04);
  --border-hover: rgba(0,0,0,0.08);
  --glow-primary: rgba(255,0,72,0.2);
  --glow-accent: rgba(252,218,1,0.3);
  --radius: 24px;
  --radius-lg: 32px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.nav-brand:focus-visible,
.fb:focus-visible,
.btt:focus-visible {
  outline: 3px solid #111111;
  outline-offset: 3px;
}

::selection { background: var(--primary); color: white; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--primary-dark); border-radius: 4px; }

/* ═══ LOADER ═══ */
.loader-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  transition: opacity 0.6s, visibility 0.6s;
}
.loader-overlay.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-ring {
  width: 60px; height: 60px; border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  animation: spin 0.8s linear infinite;
}
.loader-text { margin-top: 20px; font-size: 12px; letter-spacing: 4px; text-transform: uppercase; color: var(--text-muted); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ═══ SCROLL PROGRESS ═══ */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 9999;
  box-shadow: 0 0 20px var(--glow-primary);
}

/* ═══ CURSOR GLOW ═══ */
.cursor-glow {
  position: fixed; width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,0,72,0.06) 0%, transparent 70%);
  pointer-events: none; z-index: 1;
  transform: translate(-50%, -50%);
  transition: left 0.3s ease-out, top 0.3s ease-out;
}

/* ═══ PARTICLES ═══ */
.particles-container {
  position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 1;
}
.particle {
  position: absolute; border-radius: 50%; pointer-events: none;
  animation: particleFloat linear infinite;
}
@keyframes particleFloat {
  0% { transform: translateY(0) scale(1); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100vh) scale(0); opacity: 0; }
}

/* ═══ HERO ═══ */
.hero {
  min-height: 100vh; position: relative; display: flex;
  align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(155deg, #3A1530 0%, #6E1A3A 55%, #C21B4D 100%);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.18) 1px, transparent 1.3px),
    linear-gradient(180deg,
      transparent 72%,
      rgba(255,255,255,0.2) 88%,
      rgba(255,255,255,1) 100%
    );
  background-size: 16px 16px, 100% 100%;
}
.hero-content {
  position: relative; z-index: 3; text-align: center;
  max-width: 800px; padding: 40px 24px;
  animation: heroIn 1.2s ease-out 0.5s both;
}
@keyframes heroIn {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0,0,0,0.04); backdrop-filter: blur(12px);
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: 50px; padding: 8px 20px;
  font-size: 11px; font-weight: 700; letter-spacing: 4px;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 32px;
}
.hero-badge .pulse {
  width: 8px; height: 8px; border-radius: 50%; background: var(--primary);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{box-shadow:0 0 0 0 var(--glow-primary)} 50%{box-shadow:0 0 0 8px transparent} }

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(42px, 8vw, 86px);
  font-weight: 900; line-height: 1.0;
  letter-spacing: -2px; margin-bottom: 8px; color: white;
}
.hero-140 {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--primary) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}
@keyframes shimmer { to { background-position: 200% center; } }

.hero h2 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 4vw, 42px);
  font-weight: 700; font-style: italic;
  color: rgba(255,255,255,0.9);
  margin-bottom: 24px; letter-spacing: -1px;
}
.hero-sub {
  font-size: 17px; line-height: 1.7;
  color: rgba(255,255,255,0.8); max-width: 540px;
  margin: 0 auto 40px;
}
.hero-years {
  display: inline-flex; align-items: center; gap: 0;
  background: rgba(0,0,0,0.04);
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 60px; padding: 6px;
  backdrop-filter: blur(12px);
}
.yr {
  padding: 14px 36px; font-weight: 800; font-size: 22px;
  letter-spacing: 2px; border-radius: 50px;
  transition: var(--transition);
}
.yr.start {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white; box-shadow: 0 4px 20px var(--glow-primary);
}
.yr.end {
  background: rgba(255,255,255,0.1); color: var(--accent);
}
.yr-dash { width: 40px; text-align: center; color: var(--text-dim); font-weight: 300; font-size: 24px; }

.scroll-indicator {
  position: absolute; bottom: 40px; left: 50%;
  transform: translateX(-50%); z-index: 3;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: heroIn 1.2s ease-out 1.2s both;
}
.scroll-mouse {
  width: 26px; height: 40px; border-radius: 13px;
  border: 2px solid rgba(255,255,255,0.3);
  position: relative;
}
.scroll-mouse::after {
  content: ''; position: absolute;
  top: 8px; left: 50%; transform: translateX(-50%);
  width: 3px; height: 8px; border-radius: 3px;
  background: var(--accent);
  animation: scrollDot 1.5s ease-in-out infinite;
}
@keyframes scrollDot { 0%{top:8px;opacity:1} 100%{top:24px;opacity:0} }
.scroll-text {
  font-size: 10px; letter-spacing: 3px;
  text-transform: uppercase; color: var(--text-dim);
}

/* ═══ STATS ═══ */
.stats-section {
  padding: 80px 24px; position: relative;
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 50%, var(--bg) 100%);
}
.stats-grid {
  max-width: 800px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.stat-card {
  text-align: center; padding: 32px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.stat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0; transition: opacity 0.3s;
}
.stat-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.stat-card:hover::before { opacity: 1; }
.stat-num {
  font-size: 42px; font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; line-height: 1; margin-bottom: 8px;
  font-family: var(--font-serif);
}
.stat-label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 3px; text-transform: uppercase;
  color: var(--text-dim);
}

/* ═══ STICKY NAV ═══ */
.sticky-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  transition: var(--transition);
}
.sticky-inner {
  max-width: 1000px; margin: 0 auto;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.nav-brand {
  font-size: 13px; font-weight: 800;
  letter-spacing: 3px; text-transform: uppercase;
  color: var(--primary-dark); margin-right: 16px; white-space: nowrap;
  text-decoration: none;
}
.nav-brand:hover { text-decoration: underline; text-underline-offset: 4px; }
.fl {
  font-size: 10px; font-weight: 600;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--text-dim); margin-right: 4px;
}
.fb {
  border: 1px solid var(--border);
  background: transparent; color: var(--text-muted);
  padding: 6px 14px; border-radius: 24px;
  font-family: inherit; font-size: 12px; font-weight: 600;
  cursor: pointer; transition: var(--transition);
  display: flex; align-items: center; gap: 6px;
}
.fb .d { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.fb .d--foundation { background: var(--primary); }
.fb .d--milestone { background: #8b44cc; }
.fb .d--president { background: #4468CC; }
.fb .d--headquarters { background: #e07b30; }
.fb .d--fair { background: #169b76; }
.fb .d--challenge { background: #cc7700; }
.fb:hover { border-color: var(--primary); color: var(--primary); }
.fb.on {
  background: var(--primary); border-color: var(--primary); color: white;
  box-shadow: 0 2px 12px var(--glow-primary);
}

/* ═══ IMAGE SECTIONS ═══ */
.image-break {
  position: relative; height: 50vh; min-height: 350px;
  overflow: hidden; margin: 0;
}
.image-break img {
  width: 100%; height: 100%; object-fit: cover;
  filter: brightness(0.8) saturate(1.1);
  transition: transform 0.5s;
}
.image-break:hover img { transform: scale(1.02); }
.image-break-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, var(--bg) 0%, transparent 30%, transparent 70%, var(--bg) 100%);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; text-align: center; padding: 24px;
}
.image-break-overlay h3 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900; color: #FFFFFF;
  text-shadow: 0 4px 30px rgba(0,0,0,0.8);
  margin-bottom: 12px;
}
.image-break-overlay p {
  font-size: 16px; color: rgba(255,255,255,0.9);
  text-shadow: 0 2px 10px rgba(0,0,0,0.8);
  max-width: 500px;
}

/* ═══ TIMELINE ═══ */
.tl-wrap {
  max-width: 1000px; margin: 0 auto;
  padding: 80px 24px;
}
.era {
  position: relative; z-index: 2;
  display: flex; align-items: center; gap: 16px;
  margin: 64px 0 32px;
  opacity: 1; transform: none;
  transition: opacity 0.6s, transform 0.6s;
}
.era.vis { opacity: 1; transform: none; }
.era::before, .era::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.era-chip {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: white; padding: 8px 24px;
  border-radius: 30px; font-size: 11px; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  white-space: nowrap;
  box-shadow: 0 4px 20px var(--glow-primary);
}

.tl { position: relative; }
.tl::before {
  content: ''; position: absolute;
  left: 50%; transform: translateX(-50%);
  top: 0; bottom: 0; width: 2px;
  background: var(--border);
}
.tl-fill {
  position: absolute; left: 50%; transform: translateX(-50%);
  top: 0; width: 2px; height: 0;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  z-index: 1;
  box-shadow: 0 0 12px var(--glow-primary);
}

.item {
  display: grid; grid-template-columns: 1fr 56px 1fr;
  margin-bottom: 8px;
  opacity: 1; transform: none;
  transition: opacity 0.6s cubic-bezier(0.4,0,0.2,1), transform 0.6s cubic-bezier(0.4,0,0.2,1);
}
.item.vis { opacity: 1; transform: none; }
.item.hid { display: none !important; }
.item:nth-child(2n) { transition-delay: 0.08s; }

.item.L .card { grid-column:1; } .item.L .mid { grid-column:2; } .item.L .sp { grid-column:3; }
.item.R .sp { grid-column:1; } .item.R .mid { grid-column:2; } .item.R .card { grid-column:3; }

.mid {
  display: flex; justify-content: center;
  padding-top: 24px; position: relative; z-index: 2;
}
.dot {
  width: 16px; height: 16px; border-radius: 50%;
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--border);
  transition: var(--transition); flex-shrink: 0;
}
.item:hover .dot {
  transform: scale(1.6);
  box-shadow: 0 0 0 4px currentColor, 0 0 24px currentColor;
}

.card { padding: 8px 18px; }
.item.L .card { padding-right: 32px; }
.item.R .card { padding-left: 32px; }

.ci {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  transition: var(--transition);
  position: relative; overflow: hidden;
  box-shadow: 0 8px 30px rgba(0,0,0,0.04);
}
.ci::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 4px; height: 100%;
}
.ci::after {
  content: ''; position: absolute; top: 0; right: 0;
  width: 100%; height: 100%;
  background: radial-gradient(circle at top right, rgba(200,16,46,0.05), transparent 60%);
  opacity: 0; transition: opacity 0.3s;
}
.item:hover .ci {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.08), 0 0 0 1px var(--border-hover);
}
.item:hover .ci::after { opacity: 1; }

.ci .pre {
  font-size: 10px; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--primary); margin-bottom: 6px;
  display: inline-block;
}
.ci .year {
  font-size: 32px; font-weight: 900;
  font-family: var(--font-serif);
  line-height: 1; margin-bottom: 10px;
  letter-spacing: -1px;
}
.ci .ttl {
  font-size: 16px; font-weight: 700;
  line-height: 1.4; margin-bottom: 10px;
  color: var(--text);
}
.ci .bd {
  font-size: 14px; line-height: 1.7;
  color: var(--text-muted);
}
.ci .bd strong { color: var(--text); font-weight: 600; }

/* Category colors */
.cat-f .dot { background: var(--primary); color: var(--primary); }
.cat-f .ci::before { background: linear-gradient(180deg,#C8102E,#9B0A20); }
.cat-f .year { color: var(--primary); }

.cat-p .dot { background: #4468CC; color: #4468CC; }
.cat-p .ci::before { background: linear-gradient(180deg,#4468CC,#6b8eee); }
.cat-p .year { color: #6b8eee; }

.cat-s .dot { background: #e07b30; color: #e07b30; }
.cat-s .ci::before { background: linear-gradient(180deg,#e07b30,#f0a060); }
.cat-s .year { color: #f0a060; }

.cat-r .dot { background: #169b76; color: #169b76; }
.cat-r .ci::before { background: linear-gradient(180deg,#169b76,#36c49a); }
.cat-r .year { color: #36c49a; }

.cat-h .dot { background: #8b44cc; color: #8b44cc; }
.cat-h .ci::before { background: linear-gradient(180deg,#8b44cc,#b06ee8); }
.cat-h .year { color: #b06ee8; }

.cat-c .dot { background: #cc7700; color: #cc7700; }
.cat-c .ci::before { background: linear-gradient(180deg,#cc7700,#f09930); }
.cat-c .year { color: #f09930; }

/* ═══ PRESIDENTS ═══ */
.pres-section {
  max-width: 1000px; margin: 40px auto 0; padding: 0 24px;
}
.pres-head { text-align: center; margin-bottom: 32px; }
.pres-head h3 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 900; color: var(--text); margin-bottom: 8px;
}
.pres-head p {
  font-size: 12px; font-weight: 600; letter-spacing: 2px;
  text-transform: uppercase; color: var(--text-dim);
}
.pres-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
}
.pres-row {
  display: flex; align-items: baseline; gap: 14px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 14px 18px;
  transition: var(--transition);
}
.pres-row:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.pres-years {
  font-family: var(--font-serif); font-weight: 800; font-size: 13px;
  color: var(--primary); white-space: nowrap; min-width: 112px;
}
.pres-name { font-size: 14px; font-weight: 600; color: var(--text); }
.pres-row.current {
  border-color: rgba(255,204,0,0.4);
  background: linear-gradient(135deg, rgba(255,204,0,0.08), transparent);
}
.pres-row.current .pres-years { color: var(--accent); }

@media (max-width: 640px) {
  .pres-grid { grid-template-columns: 1fr; }
}

/* ═══ SOURCES ═══ */
.src {
  margin-top: 80px;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 32px;
  border: 1px solid var(--border);
}
.src h3 {
  font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 3px;
  color: var(--accent); margin-bottom: 12px;
}
.src p { font-size: 13px; color: var(--text-muted); line-height: 2; }
.src .warn {
  margin-top: 16px; font-size: 12px;
  background: rgba(212,168,83,0.08);
  border: 1px solid rgba(212,168,83,0.2);
  border-radius: 10px; padding: 12px 16px;
  color: var(--accent);
}

/* ═══ FLOATING YEAR ═══ */
.float-year {
  position: fixed; right: 28px; top: 50%;
  transform: translateY(-50%);
  z-index: 90; writing-mode: vertical-lr;
  font-size: 72px; font-weight: 900;
  font-family: var(--font-serif);
  letter-spacing: -3px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.08; pointer-events: none;
  transition: opacity 0.4s;
}
.float-year.in-hero { opacity: 0; }

/* ═══ BACK TO TOP ═══ */
.btt {
  position: fixed; bottom: 32px; right: 32px;
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white; border: none;
  font-size: 20px; cursor: pointer; z-index: 90;
  opacity: 0; transform: translateY(16px);
  transition: var(--transition);
  box-shadow: 0 4px 24px var(--glow-primary);
  display: flex; align-items: center; justify-content: center;
}
.btt.show { opacity: 1; transform: translateY(0); }
.btt:hover { transform: translateY(-2px) scale(1.1); }

/* ═══ FOOTER ═══ */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 60px 24px; text-align: center;
}
.footer-brand {
  font-size: 13px; font-weight: 800;
  letter-spacing: 5px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
.footer-text { font-size: 13px; color: var(--text-dim); margin-bottom: 8px; }
.footer-line {
  width: 40px; height: 2px; margin: 20px auto;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 1px;
}
.footer-copy { font-size: 11px; color: var(--text-dim); }

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .image-break { height: 35vh; min-height: 250px; }
}
@media (max-width: 640px) {
  .tl::before, .tl-fill { left: 22px !important; transform: none !important; }
  .item { grid-template-columns: 44px 1fr !important; }
  .item.L .card, .item.R .card { grid-column: 2 !important; padding-left: 14px !important; padding-right: 0 !important; }
  .item.L .mid, .item.R .mid { grid-column: 1 !important; }
  .sp { display: none !important; }
  .float-year, .cursor-glow { display: none; }
  .hero h1 { font-size: 36px; letter-spacing: -1px; }
  .sticky-inner { gap: 4px; }
  .fb { padding: 5px 10px; font-size: 11px; }
  .stat-num { font-size: 32px; }
  .era-chip {
    max-width: 100%;
    white-space: normal;
    text-align: center;
    line-height: 1.5;
  }
  .btt {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (hover: none), (pointer: coarse) {
  .cursor-glow { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cz-timeline *,
  .cz-timeline *::before,
  .cz-timeline *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ═══ PRINT ═══ */
@media print {
  .sticky-nav, .scroll-progress, .float-year, .btt, .particles-container,
  .cursor-glow, .loader-overlay { display: none; }
  body { background: white; color: #111; }
  .hero { min-height: auto; padding: 40px 24px; }
  .item { opacity: 1 !important; transform: none !important; }
  .ci { box-shadow: none; border: 1px solid #ccc; background: white; }
}