:root {
  color-scheme: light dark;
  --bg: #f9fafb;
  --bg-alt: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --border: rgba(148, 163, 184, 0.35);
  --accent-1: #38bdf8;
  --accent-2: #a855f7;
  --accent-3: #f59e0b;
  --shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
  --card-bg: rgba(255, 255, 255, 0.78);
  --glass-border: rgba(148, 163, 184, 0.45);
  --toast-bg: rgba(15, 23, 42, 0.9);
  --phi: 1.618;
  --phi-inv: 0.618;
  --baseline: 12px;
  --baseline-phi-inv: calc(var(--baseline) * var(--phi-inv));
  --baseline-phi: calc(var(--baseline) * var(--phi));
  --baseline-phi2: calc(var(--baseline) * var(--phi) * var(--phi));
  --baseline-phi3: calc(var(--baseline-phi2) * var(--phi));
  --section-inline: clamp(5vw, 8vw, 96px);
  --section-block: clamp(96px, 12vw, 140px);
}

.dark {
  --bg: #030712;
  --bg-alt: #0b1120;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: rgba(51, 65, 85, 0.6);
  --accent-1: #38bdf8;
  --accent-2: #c084fc;
  --accent-3: #fbbf24;
  --shadow: 0 24px 55px rgba(2, 6, 23, 0.55);
  --card-bg: rgba(15, 23, 42, 0.7);
  --glass-border: rgba(59, 130, 246, 0.25);
  --toast-bg: rgba(2, 6, 23, 0.92);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; }

a { color: inherit; text-decoration: none; }

a:hover { text-decoration: underline; }

.skip {
  position: absolute;
  top: -40px;
  left: 16px;
  padding: 10px 16px;
  background: var(--bg-alt);
  border-radius: 12px;
  border: 1px solid var(--border);
  z-index: 200;
}

.skip:focus { top: 16px; outline: 2px solid var(--accent-1); }

.bg-radial {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.28), transparent 55%),
              radial-gradient(circle at 80% 30%, rgba(248, 113, 113, 0.22), transparent 60%),
              radial-gradient(circle at 50% 80%, rgba(16, 185, 129, 0.2), transparent 65%);
  z-index: -2;
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.12) 1px, transparent 1px);
  background-size: 120px 120px;
  z-index: -3;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-alt) 75%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--section-inline);
  gap: calc(var(--baseline) * var(--phi-inv) + 8px);
}

.brand { display: flex; align-items: center; gap: 14px; font-weight: 600; }
.spark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: white;
}
.brand-meta { display: flex; flex-direction: column; gap: 2px; }
.brand-name { font-size: 18px; letter-spacing: 0.04em; text-transform: uppercase; }
.brand-sub { font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted); }
.badge { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: rgba(249, 115, 22, 0.12); border: 1px solid rgba(249, 115, 22, 0.22); color: var(--muted); }

.nav { display: none; gap: 8px; }
.nav-link { padding: 8px 12px; border-radius: 12px; color: color-mix(in oklab, var(--text) 80%, transparent); font-weight: 500; }
.nav-link:hover { background: rgba(148, 163, 184, 0.18); color: var(--text); }
.nav-link.active { background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(168, 85, 247, 0.18)); color: var(--text); }

.actions { display: flex; gap: 10px; align-items: center; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 14px;
  border: 1px solid transparent;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  background: none;
  color: var(--text);
}

.btn.icon {
  min-width: 44px;
  height: 44px;
  width: 44px;
  padding: 0;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-alt) 72%, transparent);
  border-radius: 50%;
  display: grid;
  place-items: center;
}
.btn.icon svg { flex-shrink: 0; }
.theme-label { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; }
.btn.primary { background: linear-gradient(120deg, var(--accent-1), var(--accent-3)); color: #fff; border: none; box-shadow: var(--shadow); }
.btn.outline { border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 80%, transparent); }
.btn.solid { background: linear-gradient(120deg, var(--accent-1), var(--accent-3)); border: none; color: #fff; box-shadow: var(--shadow); }
.btn:hover { filter: brightness(1.05); }
.btn:focus-visible { outline: 2px solid var(--accent-1); outline-offset: 2px; }

.main { position: relative; }
.section { padding: var(--section-block) var(--section-inline); }

.hero { min-height: 100vh; display: grid; align-items: center; position: relative; padding-top: clamp(120px, 14vw, 160px); }
.hero-columns { display: grid; gap: clamp(32px, 5vw, 64px); }
.hero-text { max-width: 620px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.2em; color: var(--muted); font-size: 12px; }
.hero-text h1 { margin: calc(var(--baseline) * var(--phi-inv) * 2) 0 var(--baseline-phi); font-size: clamp(40px, 8vw, 72px); line-height: 1.05; }
.lead { font-size: clamp(18px, 2.5vw, 22px); color: color-mix(in oklab, var(--text) 80%, transparent); margin-bottom: var(--baseline-phi2); }
.hero-chips { display: none; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--baseline); margin-bottom: var(--baseline-phi2); }
.hero-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--baseline-phi); margin-top: var(--baseline); }
.hero-stats .stat { padding: 16px; border-radius: 14px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 78%, transparent); display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; font-size: 18px; font-weight: 600; }
.stat-label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--muted); }
.stat-value { font-size: 22px; font-weight: 700; }

.hero-visual { display: grid; gap: 18px; }
.hero-panel { border-radius: 20px; border: 1px solid var(--glass-border); background: var(--card-bg); box-shadow: var(--shadow); overflow: hidden; }
.hero-panel header { display: flex; align-items: center; gap: 6px; padding: 16px 18px; border-bottom: 1px solid var(--border); font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.18em; }
.hero-panel pre { margin: 0; padding: 18px 20px 24px; font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; color: var(--text); overflow-x: auto; }
.research-block { display: flex; flex-direction: column; gap: var(--baseline); padding: var(--baseline-phi) var(--baseline-phi2); }
.research-intro { margin: 0; font-size: 14px; color: color-mix(in oklab, var(--text) 78%, transparent); }
.research-list { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--baseline); }
.research-list li { display: grid; grid-template-columns: auto 1fr; gap: var(--baseline); align-items: start; padding: var(--baseline); border-radius: 16px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 85%, transparent); }
.research-emoji { font-size: 20px; line-height: 1; display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 12px; background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), rgba(168, 85, 247, 0.12)); }
.research-list h5 { margin: 0 0 4px; font-size: 15px; }
.research-list p { margin: 0; font-size: 13px; color: color-mix(in oklab, var(--text) 76%, transparent); }

/* Research block animations - Progressive enhancement */
/* Base state: items hidden until animated */
.reveal-ready [data-animate-research] .research-anim-intro,
.reveal-ready [data-animate-research] .research-anim-item {
  opacity: 0;
  transform: translateY(20px);
}

/* Intro animation */
.reveal-ready [data-animate-research].research-active .research-anim-intro {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 600ms ease, transform 600ms ease;
}

/* Item stagger animation */
.reveal-ready [data-animate-research].research-active .research-anim-item {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 500ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="0"] {
  transition-delay: 0ms;
}
.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="150"] {
  transition-delay: 150ms;
}
.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="300"] {
  transition-delay: 300ms;
}
.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="450"] {
  transition-delay: 450ms;
}

/* Emoji pulse on appear */
@keyframes emoji-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="0"] .research-emoji {
  animation: emoji-pulse 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 0ms;
}
.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="150"] .research-emoji {
  animation: emoji-pulse 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 150ms;
}
.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="300"] .research-emoji {
  animation: emoji-pulse 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 300ms;
}
.reveal-ready [data-animate-research].research-active .research-anim-item[data-delay="450"] .research-emoji {
  animation: emoji-pulse 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 450ms;
}

/* Hover interactions for research items */
.research-list li {
  transition: transform 200ms ease-out, 
              border-color 200ms ease-out,
              background 200ms ease-out;
}

.research-list li:hover {
  transform: translateX(4px);
  border-color: color-mix(in oklab, var(--accent-1) 60%, transparent);
  background: color-mix(in oklab, var(--bg-alt) 90%, transparent);
  cursor: pointer;
}

/* Emoji hover */
.research-emoji {
  transition: transform 200ms ease-out;
}

.research-list li:hover .research-emoji {
  transform: scale(1.1);
}

/* Header dots polish */
.dot {
  transition: filter 150ms ease, transform 150ms ease;
  cursor: pointer;
}

.dot:hover {
  filter: brightness(1.2);
  transform: scale(1.1);
}

.dot.green {
  animation: pulse-green 2s ease-in-out infinite;
}

@keyframes pulse-green {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* No-JS fallback */
.no-js [data-animate-research] .research-anim-intro,
.no-js [data-animate-research] .research-anim-item {
  opacity: 1 !important;
  transform: none !important;

/* Timeline animations - Progressive enhancement */
/* Base state: items hidden until animated */
.reveal-ready [data-animate-timeline] .timeline-anim-item {
  opacity: 0;
  transform: translateX(-30px);
}

/* Timeline stagger animation */
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item {
  opacity: 1;
  transform: translateX(0);
  transition: opacity 500ms cubic-bezier(0.4, 0, 0.2, 1),
              transform 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="0"] {
  transition-delay: 0ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="100"] {
  transition-delay: 100ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="200"] {
  transition-delay: 200ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="300"] {
  transition-delay: 300ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="400"] {
  transition-delay: 400ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="500"] {
  transition-delay: 500ms;
}

/* Timeline icon pulse on appear */
@keyframes icon-glow {
  0% { filter: brightness(1) drop-shadow(0 0 0 transparent); }
  50% { filter: brightness(1.3) drop-shadow(0 0 8px var(--accent-1)); }
  100% { filter: brightness(1) drop-shadow(0 0 0 transparent); }
}

.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="0"] .icon {
  animation: icon-glow 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 0ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="100"] .icon {
  animation: icon-glow 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 100ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="200"] .icon {
  animation: icon-glow 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 200ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="300"] .icon {
  animation: icon-glow 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 300ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="400"] .icon {
  animation: icon-glow 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 400ms;
}
.reveal-ready [data-animate-timeline].timeline-active .timeline-anim-item[data-delay="500"] .icon {
  animation: icon-glow 800ms cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: 500ms;
}

/* Timeline dot pulse */
.reveal-ready [data-animate-timeline].timeline-active .timeline-item::before {
  animation: dot-pulse 1s cubic-bezier(0.4, 0, 0.2, 1);
  animation-delay: inherit;
}

@keyframes dot-pulse {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

/* Timeline hover enhancements */
.timeline-item {
  transition: transform 250ms ease-out, box-shadow 250ms ease-out;
}

.timeline-item:hover {
  transform: translateX(6px);
  box-shadow: 0 24px 48px rgba(56, 189, 248, 0.15);
}

.timeline-item:hover .icon {
  filter: brightness(1.2);
  transform: scale(1.05);
}

.timeline-item .icon {
  transition: filter 200ms ease, transform 200ms ease;
}

/* No-JS fallback */
.no-js [data-animate-timeline] .timeline-anim-item {
  opacity: 1 !important;

/* Section header animation enhancement */
.reveal-ready [data-animate-header] .header-title {
  opacity: 0;
  transform: translateX(-20px);
  filter: blur(4px);
}

.reveal-ready [data-animate-header].header-active .header-title {
  opacity: 1;
  transform: translateX(0);
  filter: blur(0);
  transition: opacity 600ms ease,
              transform 600ms cubic-bezier(0.4, 0, 0.2, 1),
              filter 600ms ease;
}

/* Tag slides in from right */
.reveal-ready [data-animate-header] .header-tag {
  opacity: 0;
  transform: translateX(30px);
}

.reveal-ready [data-animate-header].header-active .header-tag {
  opacity: 1;
  transform: translateX(0);
  transition: opacity 500ms ease,
              transform 500ms cubic-bezier(0.4, 0, 0.2, 1);
  transition-delay: 400ms;
}

/* Arrow pulse animation */
.tag-arrow {
  display: inline-block;
  animation: arrow-pulse 2s ease-in-out infinite;
  transform-origin: center;
}

@keyframes arrow-pulse {
  0%, 100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.15);
    filter: brightness(1.3);
  }
}

/* Tag border draw effect */
.header-tag {
  position: relative;
  overflow: hidden;
}

.header-tag::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid var(--border);
  border-radius: inherit;
  opacity: 0;
}

.reveal-ready [data-animate-header].header-active .header-tag::before {
  opacity: 1;
  animation: border-draw 600ms ease forwards;
  animation-delay: 400ms;
}

@keyframes border-draw {
  0% {
    clip-path: inset(0 100% 0 0);
  }
  100% {
    clip-path: inset(0 0 0 0);
  }
}

/* Hover enhancements */
.header-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.2);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.header-tag:hover .tag-arrow {
  animation: arrow-pulse 0.5s ease-in-out;
  filter: brightness(1.4) drop-shadow(0 0 4px var(--accent-1));
}

/* No-JS fallback */
.no-js [data-animate-header] .header-title,
.no-js [data-animate-header] .header-tag {
  opacity: 1 !important;
  transform: none !important;
  filter: none !important;
}
  transform: none !important;
}
}
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.red { background: #f97316; }
.dot.amber { background: #f59e0b; }
.dot.green { background: #22c55e; }

.orbital { position: relative; height: clamp(220px, 32vw, 320px); border-radius: 24px; border: 1px solid rgba(56, 189, 248, 0.28); background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(168, 85, 247, 0.12)); overflow: hidden; }
.orbital .particle { position: absolute; border-radius: 999px; background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95), rgba(255,255,255,0.25) 60%, transparent 75%); filter: drop-shadow(0 0 12px rgba(59,130,246,0.5)); }
.orbital .ring { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); border: 1px solid rgba(148, 163, 184, 0.35); border-radius: 999px; }

.hero-scroll-hint { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: 8px; font-size: 12px; letter-spacing: 0.18em; color: var(--muted); text-transform: uppercase; }
.hero-scroll-hint svg { stroke: currentColor; }

.section-header { display: flex; flex-direction: column; gap: var(--baseline-phi); max-width: 780px; margin-bottom: clamp(var(--baseline-phi2), 6vw, var(--baseline-phi3)); }
.section-header h2 { margin: 0; font-size: clamp(32px, 6vw, 48px); }
.section-header p { margin: 0; color: color-mix(in oklab, var(--text) 78%, transparent); }
.tag { align-self: flex-start; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }

.about-grid { display: grid; gap: clamp(24px, 4vw, 36px); }
.about-card { border-radius: 20px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 82%, transparent); padding: 24px 28px; box-shadow: var(--shadow); }
.about-card.card-hover { cursor: pointer; }
.about-card.focus { border: 1px solid var(--glass-border); background: var(--card-bg); }
.about-card.focus ul { padding-left: 0; margin: 0; list-style: none; display: grid; gap: var(--baseline); }
.about-card.focus li { padding-left: var(--baseline-phi); position: relative; }
.about-card.focus li::before { content: ""; position: absolute; left: 0; top: calc(var(--baseline) * 0.5); width: 6px; height: 6px; border-radius: 999px; background: linear-gradient(135deg, var(--accent-1), var(--accent-2)); }
.about-card h3 { margin-top: 0; }
.about-card ul { list-style: none; margin: var(--baseline-phi) 0 0; padding: 0; display: grid; gap: var(--baseline); }
.about-card li { padding-left: var(--baseline-phi); position: relative; }
.about-card li::before { content: ""; position: absolute; left: 0; top: calc(var(--baseline) * 0.5); width: 6px; height: 6px; border-radius: 999px; background: linear-gradient(135deg, var(--accent-1), var(--accent-2)); }

.timeline { display: grid; gap: var(--baseline-phi); border-left: 1px solid rgba(148, 163, 184, 0.25); padding-left: clamp(var(--baseline-phi), 3vw, var(--baseline-phi2)); }
.timeline-item { position: relative; padding: var(--baseline-phi) clamp(var(--baseline-phi), 4vw, var(--baseline-phi2)); border-radius: 18px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 78%, transparent); box-shadow: var(--shadow); }
.timeline-item.card-hover { cursor: pointer; }
.timeline-item::before { content: ""; position: absolute; left: calc(-1 * clamp(var(--baseline-phi), 4vw, var(--baseline-phi2))); top: var(--baseline-phi); width: 12px; height: 12px; border-radius: 50%; border: 3px solid var(--bg); background: linear-gradient(135deg, var(--accent-1), var(--accent-2)); box-shadow: 0 0 0 var(--baseline-phi-inv) rgba(56, 189, 248, 0.15); }
.timeline-item header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.timeline-item header h3 { margin: 0; }
.timeline-item p { margin: 0; color: color-mix(in oklab, var(--text) 76%, transparent); }
.timeline-item .icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; background: linear-gradient(135deg, var(--accent-1), var(--accent-3)); color: white; }
.timeline-item .icon.icon-pulse { animation: icon-gentle-pulse 3s ease-in-out infinite; }

.principles-grid { display: grid; gap: clamp(24px, 4vw, 36px); }
.principle-card { border-radius: 20px; border: 1px solid var(--glass-border); background: var(--card-bg); padding: clamp(24px, 4vw, 32px); box-shadow: var(--shadow); }
.principle-card.card-hover { cursor: pointer; }
.principle-card h3 { margin-top: 0; margin-bottom: 12px; }
.principle-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--baseline); }
.principle-card ul li { padding-left: var(--baseline-phi); position: relative; color: color-mix(in oklab, var(--text) 78%, transparent); }
.principle-card ul li::before { content: ""; position: absolute; left: 0; top: calc(var(--baseline) * 0.5); width: 6px; height: 6px; border-radius: 999px; background: linear-gradient(135deg, var(--accent-1), var(--accent-2)); }
.principle-card p { margin: 0 0 16px; color: color-mix(in oklab, var(--text) 78%, transparent); }

.showcase-wrapper { position: relative; }
.showcase-track { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(280px, 340px); gap: 18px; overflow-x: auto; padding-bottom: 12px; scroll-snap-type: x mandatory; scrollbar-width: thin; }
.showcase-track:focus { outline: 2px solid var(--accent-1); outline-offset: 2px; }
.showcase-track::-webkit-scrollbar { height: 6px; }
.showcase-track::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, 0.4); border-radius: 999px; }
.showcase-card { scroll-snap-align: start; border-radius: 20px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 78%, transparent); padding: var(--baseline-phi) var(--baseline-phi2); box-shadow: var(--shadow); min-height: 220px; display: flex; flex-direction: column; gap: var(--baseline); }
.showcase-card.card-hover { cursor: pointer; }
.showcase-card header { display: flex; align-items: center; gap: 12px; }
.showcase-card .icon { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 14px; background: linear-gradient(135deg, var(--accent-2), var(--accent-1)); color: #fff; flex-shrink: 0; }
.showcase-card .icon.icon-pulse { animation: icon-gentle-pulse 3s ease-in-out infinite; }
.showcase-card h3 { margin: 0; }
.showcase-card p { flex: 1; margin: 0; color: color-mix(in oklab, var(--text) 76%, transparent); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; }
.chips span { padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border); background: rgba(148, 163, 184, 0.12); }
.showcase-hint { margin-top: 10px; font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }

.projects-grid { display: grid; gap: clamp(var(--baseline-phi2), 6vw, var(--baseline-phi3)); }
.project-narrative h3 { margin-top: 0; margin-bottom: var(--baseline-phi); font-size: clamp(28px, 4vw, 36px); }
.project-narrative h4 { margin-bottom: var(--baseline); text-transform: uppercase; letter-spacing: 0.14em; font-size: 13px; color: var(--muted); }
.project-narrative p { margin-top: 0; margin-bottom: var(--baseline-phi); color: color-mix(in oklab, var(--text) 78%, transparent); }
.project-cards { display: grid; gap: var(--baseline-phi); margin-top: var(--baseline-phi); }
.project-card { border-radius: 18px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 80%, transparent); padding: var(--baseline-phi) var(--baseline-phi2); box-shadow: var(--shadow); }
.project-card.card-hover { cursor: pointer; }
.project-card h5 { margin: 0 0 var(--baseline); letter-spacing: 0.12em; text-transform: uppercase; font-size: 12px; color: var(--muted); }
.project-card ul { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--baseline); }
.project-card li { padding-left: var(--baseline-phi); position: relative; }
.project-card li::before { content: ""; position: absolute; left: 0; top: calc(var(--baseline) * 0.5); width: 6px; height: 6px; border-radius: 999px; background: linear-gradient(135deg, var(--accent-1), var(--accent-2)); }

.project-diagram { display: flex; justify-content: center; }
.diagram-shell { width: min(100%, 540px); border-radius: 24px; border: 1px solid var(--glass-border); background: var(--card-bg); box-shadow: var(--shadow); padding: var(--baseline-phi2); display: flex; flex-direction: column; gap: var(--baseline-phi); }
.diagram-head { display: flex; flex-direction: column; gap: var(--baseline); }
.diagram-label { font-size: 14px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }

.feature-controls { display: grid; gap: var(--baseline); grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.feature-button {
  display: inline-flex;
  align-items: center;
  gap: var(--baseline);
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-alt) 85%, transparent);
  padding: calc(var(--baseline) * 1.2) var(--baseline-phi);
  font-weight: 600;
  cursor: pointer;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease, transform .25s ease;
}
.feature-button span { text-align: left; }
.feature-button[aria-selected="true"] {
  border-color: color-mix(in oklab, var(--accent-1) 65%, transparent);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.16), rgba(168, 85, 247, 0.12));
  box-shadow: 0 12px 28px rgba(56, 189, 248, 0.18);
}
.feature-button.is-active { transform: translateY(-2px); }
.feature-button:focus-visible { outline: 2px solid var(--accent-1); outline-offset: 2px; }

/* Feature panels - Progressive enhancement */
.feature-panels { min-height: clamp(200px, 24vw, 260px); }

.feature-panel {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-alt) 82%, transparent);
  padding: var(--baseline-phi) var(--baseline-phi2);
  box-shadow: var(--shadow);
}

.feature-panel h5 { margin: 0 0 var(--baseline); font-size: 18px; }
.feature-panel p { margin: 0; color: color-mix(in oklab, var(--text) 78%, transparent); }

/* Stacked layout when JS initializes animations */
.diagram-shell.features-ready .feature-panels {
  position: relative;
  display: grid;
}

.diagram-shell.features-ready .feature-panel {
  grid-area: 1 / 1;
  opacity: 0;
  pointer-events: none;
  transform: translateY(18px);
  transition: opacity .3s ease, transform .3s ease;
}

.diagram-shell.features-ready .feature-panel.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.diagram-shell.features-ready .feature-panel.is-leaving {
  opacity: 0;
  pointer-events: none;
  transform: translateY(18px);
}

/* No-JS fallback: show all panels stacked */
.no-js .diagram-shell .feature-panels {
  display: flex;
  flex-direction: column;
  gap: var(--baseline-phi);
}

.no-js .diagram-shell .feature-panel {
  opacity: 1 !important;
  transform: none !important;
  pointer-events: auto !important;
}

.contact-grid { display: grid; gap: clamp(24px, 5vw, 32px); }
.contact-card { border-radius: 20px; border: 1px solid var(--glass-border); background: var(--card-bg); padding: clamp(24px, 4vw, 32px); box-shadow: var(--shadow); }
.contact-card.card-hover { cursor: pointer; }
.contact-card h2 { margin-top: 0; }
.contact-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0; }
.contact-meta { display: grid; gap: 16px; }
.contact-meta article { border-radius: 18px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 80%, transparent); padding: 20px 24px; box-shadow: var(--shadow); }
.contact-meta h3 { margin-top: 0; }

.footer { border-top: 1px solid var(--border); padding: 24px clamp(5vw, 8vw, 96px) 40px; background: color-mix(in oklab, var(--bg-alt) 82%, transparent); }
.footer-inner { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.footer-links { display: flex; gap: 14px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text); }

.toast { position: fixed; top: 90px; left: 50%; transform: translateX(-50%) translateY(-12px); background: var(--toast-bg); color: white; padding: 10px 16px; border-radius: 12px; box-shadow: var(--shadow); opacity: 0; transition: opacity .18s ease, transform .18s ease; pointer-events: none; z-index: 220; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.noscript { margin: 16px auto; max-width: 960px; padding: 12px 18px; border-radius: 12px; border: 1px solid var(--border); background: color-mix(in oklab, var(--bg-alt) 70%, transparent); color: var(--muted); }

/* Reveal animations - Progressive enhancement */
/* Base state: visible by default (no-JS fallback) */
.reveal {
  opacity: 1;
  transform: none;
}

/* Only hide when JavaScript confirms it's ready to animate */
.reveal-ready .reveal {
  opacity: 0;
  transform: translateY(40px);
}

/* Animate in when triggered by IntersectionObserver */
.reveal-ready .reveal.reveal-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .7s ease, transform .7s ease;
}

/* Ensure content visible if JS disabled */
.no-js .reveal {
  opacity: 1 !important;
  transform: none !important;
}

@media (min-width: 960px) {
  .nav { display: flex; }
  .hero-columns { grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); align-items: center; }
  .about-grid { grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); }
  .timeline { margin-left: 8px; }
  .contact-grid { grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); }
  .principles-grid { grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); }
  .projects-grid { grid-template-columns: minmax(0, 1.618fr) minmax(0, 1fr); align-items: start; }
  .footer-inner { flex-direction: row; align-items: center; justify-content: space-between; }
}

@media (max-width: 720px) {
  .header-inner { padding: 16px 20px; }
  .nav { display: none; }
  .actions .btn-label { display: none; }
  .theme-label { display: none; }
  .section { padding: 80px 20px; }
  .hero { padding-top: 120px; }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .showcase-track { grid-auto-columns: minmax(220px, 260px); }
  .feature-controls { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .hero-stats { grid-template-columns: 1fr; }
  .showcase-track {
    grid-auto-flow: row;
    grid-auto-columns: 100%;
    overflow: visible;
    padding-bottom: 0;
  }
  .showcase-hint { display: none; }
  .diagram-shell { padding: var(--baseline-phi); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .reveal { opacity: 1 !important; transform: none !important; }

  .diagram-shell.features-ready .feature-panel {
    transition: none !important;
    transform: none !important;
  }
  
  /* Research block reduced motion */
  .research-anim-intro,
  .research-anim-item {
    transition: opacity 100ms ease !important;
    transform: none !important;
  }
  
  .research-emoji {
    animation: none !important;
  }
  
  .dot {
    animation: none !important;
  }
  
  .research-list li:hover {
    transform: none !important;
  }
  
  /* Timeline reduced motion */
  .timeline-anim-item {
    transition: opacity 100ms ease !important;
    transform: none !important;
  }
  
  .timeline-item .icon {
    animation: none !important;
  }
  
  .timeline-item::before {
    animation: none !important;
  }
  
  .timeline-item:hover {
    transform: none !important;
  }
  
  /* Section header reduced motion */
  .header-title {
    filter: none !important;
  }
  
  .tag-arrow {
    animation: none !important;
  }
  
  .header-tag::before {
    animation: none !important;
  }
  
  .header-tag:hover {
    transform: none !important;
  }
}

/* ============================================
   NEW ENHANCED ANIMATIONS - OLD SCHOOL AESTHETIC
   ============================================ */

/* Keyframe Animations */
@keyframes count-up {
  0% { transform: translateY(8px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes breathe {
  0%, 100% { transform: scale(1); filter: brightness(1); }
  50% { transform: scale(1.05); filter: brightness(1.1); }
}

@keyframes button-press {
  0% { transform: scale(1); }
  50% { transform: scale(0.98); }
  100% { transform: scale(1); }
}

@keyframes card-lift {
  0% { transform: translateY(0) scale(1); }
  100% { transform: translateY(-2px) scale(1.02); }
}

@keyframes nav-pulse {
  0%, 100% { background-size: 100% 2px; }
  50% { background-size: 100% 4px; }
}

@keyframes grid-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-2px); }
}

@keyframes float-particle {
  0% { transform: translateY(100vh) translateX(0) scale(0); }
  10% { transform: translateY(100vh) translateX(0) scale(1); }
  90% { transform: translateY(-20px) translateX(20px) scale(1); }
  100% { transform: translateY(-20px) translateX(20px) scale(0); }
}

@keyframes icon-gentle-pulse {
  0%, 100% { filter: brightness(1) drop-shadow(0 0 0 transparent); }
  50% { filter: brightness(1.1) drop-shadow(0 0 8px rgba(56, 189, 248, 0.2)); }
}

@keyframes chip-slide {
  0% { transform: translateX(-8px); opacity: 0; }
  100% { transform: translateX(0); opacity: 1; }
}

/* Hero Section Enhancements */
.hero-stats .stat {
  transition: all 300ms ease;
}

.counter-animate .stat-value {
  animation: count-up 800ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.counter-animate .stat-value:nth-child(1) { animation-delay: 0ms; }
.counter-animate .stat-value:nth-child(2) { animation-delay: 100ms; }
.counter-animate .stat-value:nth-child(3) { animation-delay: 200ms; }

/* Brand Spark Enhancement */
.spark {
  animation: breathe 4s ease-in-out infinite;
  transition: filter 200ms ease;
}

.spark:hover {
  animation-play-state: paused;
  filter: brightness(1.2);
}

/* Enhanced Button Interactions */
.btn {
  transition: transform 200ms cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 200ms cubic-bezier(0.4, 0, 0.2, 1),
              filter 200ms ease;
  transform-origin: center;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.15);
  filter: brightness(1.05);
}

.btn:active {
  animation: button-press 150ms ease;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.1);
}

/* Card Hover Enhancements */
.card-hover {
  transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.card-hover:hover {
  animation: card-lift 250ms ease forwards;
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.08);
}

.card-hover .icon {
  transition: transform 200ms ease;
}

.card-hover:hover .icon {
  transform: scale(1.05) rotate(2deg);
}

/* Navigation Active State */
.nav-link.active {
  position: relative;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(168, 85, 247, 0.18));
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  animation: nav-pulse 3s ease-in-out infinite;
}

/* Background Subtlety */
.bg-grid {
  animation: grid-float 8s ease-in-out infinite;
  transition: opacity 300ms ease;
}

.dark .bg-grid {
  opacity: 0.3;
}

.bg-grid:hover {
  opacity: 0.1;
}

/* Hero Particles */
.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.6), transparent);
  animation: float-particle 12s linear infinite;
  pointer-events: none;
}

.hero-particle:nth-child(2n) {
  animation-delay: -6s;
  animation-duration: 15s;
}

.hero-particle:nth-child(3n) {
  animation-delay: -3s;
  animation-duration: 10s;
}

/* Icon Pulse Animation */
.icon-pulse {
  animation: icon-gentle-pulse 3s ease-in-out infinite;
}

.icon-pulse:hover {
  animation-play-state: paused;
  filter: brightness(1.2) drop-shadow(0 0 12px rgba(56, 189, 248, 0.3));
}

/* Chip Slide Animation */
.chips span {
  transition: all 200ms ease;
}

.chip-animate .chips span {
  animation: chip-slide 400ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.chip-animate .chips span:nth-child(1) { animation-delay: 0ms; }
.chip-animate .chips span:nth-child(2) { animation-delay: 50ms; }
.chip-animate .chips span:nth-child(3) { animation-delay: 100ms; }
.chip-animate .chips span:nth-child(4) { animation-delay: 150ms; }

/* Reduced Motion Support for New Animations */
@media (prefers-reduced-motion: reduce) {
  .spark {
    animation: none !important;
  }

  .btn {
    transition: none !important;
  }

  .btn:hover {
    transform: none !important;
    filter: none !important;
  }

  .btn:active {
    animation: none !important;
  }

  .card-hover {
    transition: none !important;
  }

  .card-hover:hover {
    animation: none !important;
    transform: none !important;
  }

  .card-hover:hover .icon {
    transform: none !important;
  }

  .nav-link.active::after {
    animation: none !important;
  }

  .bg-grid {
    animation: none !important;
  }

  .hero-particle {
    animation: none !important;
  }

  .icon-pulse {
    animation: none !important;
  }

  .counter-animate .stat-value {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .chip-animate .chips span {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}
.stat-label::after { content: ' —'; }