/* ═══════════════════════════════════════════════
   akins.app — portfolio
   Apple-inspired design system
   ═══════════════════════════════════════════════ */

:root {
  --bg: #000000;
  --bg-elevated: #0d0d0f;
  --bg-card: #141417;
  --bg-card-hover: #1c1c20;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-tertiary: #6e6e73;
  --accent: #2997ff;
  --accent-strong: #0071e3;
  --gradient: linear-gradient(100deg, #2997ff 0%, #7b5bff 50%, #ff375f 100%);
  --radius: 20px;
  --radius-lg: 28px;
  --ease-spring: cubic-bezier(0.34, 1.3, 0.5, 1);
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.center { text-align: center; }
.muted { color: var(--text-tertiary); }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ─────────── Reveal on scroll ─────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: none; }

/* ═══════════ NAV ═══════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: rgba(0, 0, 0, 0.6);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.nav.scrolled { border-bottom-color: var(--border); }

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

.nav-cta {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  background: var(--accent-strong);
  padding: 7px 16px;
  border-radius: 100px;
  transition: background 0.2s, transform 0.2s var(--ease-spring);
}
.nav-cta:hover { background: var(--accent); transform: scale(1.04); }

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-burger span {
  width: 20px; height: 1.5px;
  background: var(--text);
  transition: transform 0.3s var(--ease-out), opacity 0.3s;
}
.nav.open .nav-burger span:first-child { transform: translateY(3.75px) rotate(45deg); }
.nav.open .nav-burger span:last-child { transform: translateY(-3.75px) rotate(-45deg); }

/* ═══════════ HERO ═══════════ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 120px 24px 80px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  top: 20%; left: 50%;
  width: 900px; height: 700px;
  transform: translateX(-50%);
  background:
    radial-gradient(ellipse 50% 40% at 30% 40%, rgba(41, 151, 255, 0.18), transparent 65%),
    radial-gradient(ellipse 45% 40% at 70% 55%, rgba(123, 91, 255, 0.15), transparent 65%),
    radial-gradient(ellipse 40% 35% at 50% 70%, rgba(255, 55, 95, 0.08), transparent 65%);
  pointer-events: none;
  filter: blur(20px);
}
.hero-content { position: relative; max-width: 820px; }

.hero-eyebrow {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}
.hero-title {
  font-size: clamp(48px, 9vw, 96px);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.035em;
  margin-bottom: 26px;
}
.hero-sub {
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 40px;
  line-height: 1.55;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 100px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.25s var(--ease-spring), background 0.2s, border-color 0.2s;
}
.btn-primary { background: var(--accent-strong); color: #fff; }
.btn-primary:hover { background: var(--accent); transform: scale(1.04); }
.btn-ghost {
  color: var(--accent);
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
}
.btn-ghost:hover { border-color: var(--accent); transform: scale(1.04); }
.btn-ghost .arrow { transition: transform 0.25s var(--ease-spring); }
.btn-ghost:hover .arrow { transform: translateX(4px); }
.btn-lg { padding: 16px 36px; font-size: 18px; }

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; align-items: center; }
.stat strong { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; }
.stat span { font-size: 13px; color: var(--text-tertiary); }
.stat-divider { width: 1px; height: 36px; background: var(--border-strong); }

.hero-scroll {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  width: 24px; height: 38px;
  border: 1.5px solid var(--border-strong);
  border-radius: 100px;
}
.hero-scroll span {
  position: absolute;
  top: 7px; left: 50%;
  width: 3px; height: 8px;
  margin-left: -1.5px;
  background: var(--text-tertiary);
  border-radius: 100px;
  animation: scrollHint 2s infinite var(--ease-out);
}
@keyframes scrollHint {
  0%, 100% { transform: translateY(0); opacity: 1; }
  60% { transform: translateY(12px); opacity: 0; }
}

/* ═══════════ MARQUEE ═══════════ */
.marquee {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  padding: 22px 0;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: flex;
  align-items: center;
  gap: 28px;
  width: max-content;
  animation: marquee 32s linear infinite;
}
.marquee-track span {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-tertiary);
  white-space: nowrap;
}
.marquee-track i { color: var(--border-strong); font-style: normal; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ═══════════ SECTIONS ═══════════ */
.section { padding: 130px 0; }
.section-alt { background: var(--bg-elevated); }

.section-eyebrow {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(34px, 5.5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 56px;
}

/* ═══════════ ABOUT ═══════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: start;
}
.about-text p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 22px;
  line-height: 1.7;
}
.about-text strong { color: var(--text); font-weight: 600; }

.about-cards { display: flex; flex-direction: column; gap: 18px; }
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.3s var(--ease-spring), border-color 0.3s, background 0.3s;
}
.about-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}
.about-card-icon { font-size: 26px; margin-bottom: 12px; }
.about-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.01em; }
.about-card p { font-size: 14.5px; color: var(--text-secondary); }

/* ═══════════ BENTO / SKILLS ═══════════ */
.bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: transform 0.3s var(--ease-spring), border-color 0.3s;
}
.bento-card:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.bento-large { grid-row: span 2; grid-column: span 1; }

.bento-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: rgba(41, 151, 255, 0.12);
  padding: 4px 10px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.bento-card h3 { font-size: 21px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.02em; }
.bento-card > p { font-size: 14.5px; color: var(--text-secondary); margin-bottom: 18px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 100px;
  white-space: nowrap;
}

.skill-bars { margin-top: 28px; display: flex; flex-direction: column; gap: 18px; }
.skill-bar span {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 7px;
}
.bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 100px;
  overflow: hidden;
}
.bar i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gradient);
  border-radius: 100px;
  transition: width 1.4s var(--ease-out) 0.3s;
}
.visible .bar i, .bars-animated .bar i { width: var(--w); }

/* ═══════════ PROJECTS ═══════════ */
.projects { display: flex; flex-direction: column; gap: 100px; }

.project {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 64px;
  align-items: center;
}
.project--flip .project-visual { order: 2; }
.project--flip .project-info { order: 1; }

.project-visual {
  border-radius: var(--radius-lg);
  padding: 44px 0;
  display: flex;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.project-visual--tv  { background: radial-gradient(ellipse 90% 90% at 50% 0%, rgba(41, 151, 255, 0.16), transparent), var(--bg-card); }
.project-visual--fit { background: radial-gradient(ellipse 90% 90% at 50% 0%, rgba(48, 209, 88, 0.14), transparent), var(--bg-card); }
.project-visual--pay { background: radial-gradient(ellipse 90% 90% at 50% 0%, rgba(123, 91, 255, 0.16), transparent), var(--bg-card); }
.project-visual { border: 1px solid var(--border); }

.project-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
}
.project-info h3 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 10px 0 16px;
}
.project-info > p {
  font-size: 16.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}
.project-info .chips { margin-bottom: 20px; }
.project-meta { font-size: 14px; color: var(--text-tertiary); }
.project-meta strong { color: var(--accent); font-weight: 700; }

/* ═══════════ PHONE MOCKUPS ═══════════ */
.phone {
  background: #1a1a1e;
  border: 1.5px solid #2c2c31;
  border-radius: 44px;
  padding: 10px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), inset 0 0 0 2px rgba(255,255,255,0.04);
  position: relative;
}
.phone-sm { width: 232px; }
.phone-lg { width: 300px; }

.phone-notch {
  position: absolute;
  top: 20px; left: 50%;
  transform: translateX(-50%);
  width: 84px; height: 24px;
  background: #000;
  border-radius: 100px;
  z-index: 5;
}
.phone-screen {
  border-radius: 35px;
  overflow: hidden;
  background: #0a0a0c;
  aspect-ratio: 9 / 19.2;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* — interactive project screens — */
.phone-hint {
  position: absolute;
  bottom: 14px; left: 0; right: 0;
  text-align: center;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-tertiary);
}

.screen-fit { padding: 54px 16px 16px; align-items: center; gap: 14px; }
.fit-header { font-size: 15px; font-weight: 700; align-self: flex-start; }
.fit-ring { position: relative; width: 124px; height: 124px; cursor: pointer; }
.fit-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: rgba(255,255,255,0.08); stroke-width: 9; }
.ring-fg {
  fill: none;
  stroke: #30d158;
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 264;
  stroke-dashoffset: 264;
  transition: stroke-dashoffset 0.9s var(--ease-out), stroke 0.4s;
}
.fit-ring.done .ring-fg { stroke: #ffd60a; }
.fit-ring-label {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 23px; font-weight: 800;
}
.fit-cards { display: flex; gap: 10px; width: 100%; }
.fit-card {
  flex: 1;
  border-radius: 12px;
  background: rgba(48, 209, 88, 0.1);
  border: 1px solid rgba(48, 209, 88, 0.18);
  padding: 9px 12px;
  display: flex; flex-direction: column;
}
.fit-card span { font-size: 10px; font-weight: 600; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.06em; }
.fit-card strong { font-size: 16px; font-weight: 800; letter-spacing: -0.01em; }
.fit-btn {
  width: 100%;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 700;
  color: #04210d;
  background: #30d158;
  border-radius: 100px;
  padding: 10px 0;
  transition: transform 0.2s var(--ease-spring), background 0.25s, color 0.25s;
}
.fit-btn:active { transform: scale(0.95); }
.fit-btn.done { background: #ffd60a; color: #2b2200; }
.bump { animation: bump 0.35s var(--ease-spring); }
@keyframes bump {
  0% { transform: scale(1); }
  40% { transform: scale(1.14); }
  100% { transform: scale(1); }
}

.screen-pay { padding: 54px 16px 16px; gap: 14px; }
.pay-balance span { display: block; font-size: 11px; color: var(--text-tertiary); }
.pay-balance strong { font-size: 24px; font-weight: 800; letter-spacing: -0.02em; }
.pay-card {
  height: 80px;
  border-radius: 14px;
  background: linear-gradient(120deg, #5b3df5, #8b5bff 55%, #b16bff);
  box-shadow: 0 10px 26px rgba(123, 91, 255, 0.3);
  transition: transform 0.3s var(--ease-spring);
}
.pay-card.bump { animation: bump 0.35s var(--ease-spring); }
.pay-actions { display: flex; gap: 8px; }
.pay-btn {
  flex: 1;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: #7b5bff;
  border-radius: 100px;
  padding: 9px 0;
  transition: transform 0.2s var(--ease-spring), opacity 0.2s;
}
.pay-btn:active { transform: scale(0.94); }
.pay-btn--alt { background: rgba(255,255,255,0.1); color: var(--text); }
.pay-list { display: flex; flex-direction: column; gap: 10px; overflow: hidden; }
.pay-item { display: flex; align-items: center; gap: 10px; }
.pay-item.slide-in { animation: slideIn 0.4s var(--ease-spring); }
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: none; }
}
.pay-item i { width: 26px; height: 26px; border-radius: 8px; background: rgba(255,255,255,0.08); }
.pay-item b { flex: 1; height: 8px; border-radius: 100px; background: rgba(255,255,255,0.1); }
.pay-item em { font-style: normal; font-size: 11px; font-weight: 700; color: var(--text-secondary); }
.pay-item em.pos { color: #30d158; }

/* ═══════════ INTERACTIVE DEMO ═══════════ */
.demo-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}
.demo-desc { font-size: 17px; color: var(--text-secondary); margin-bottom: 24px; line-height: 1.65; }
.demo-points { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.demo-points li {
  font-size: 15px;
  color: var(--text-secondary);
  padding-left: 28px;
  position: relative;
}
.demo-points li::before {
  content: "✓";
  position: absolute; left: 0;
  color: var(--accent);
  font-weight: 700;
}
.demo-device { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.demo-caption { font-size: 13px; color: var(--text-tertiary); }

.demo-screen {
  --d-bg: #0a0a0c;
  --d-card: #17171b;
  --d-text: #f5f5f7;
  --d-sub: #86868b;
  background: var(--d-bg);
  color: var(--d-text);
  transition: background 0.4s, color 0.4s;
}
.demo-screen[data-theme="light"] {
  --d-bg: #f5f5f7;
  --d-card: #ffffff;
  --d-text: #1d1d1f;
  --d-sub: #6e6e73;
}

.demo-statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 22px 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--d-sub);
}
.demo-status-icons { display: flex; align-items: center; gap: 5px; }
.demo-status-icons i {
  display: block;
  background: var(--d-sub);
}
.demo-status-icons .sig {
  width: 14px; height: 9px;
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  border-radius: 1px;
}
.demo-status-icons .bat {
  width: 18px; height: 9px;
  border-radius: 2.5px;
  background:
    linear-gradient(var(--d-sub), var(--d-sub)) left / 70% 100% no-repeat,
    transparent;
  border: 1px solid var(--d-sub);
}

.demo-pages { flex: 1; position: relative; overflow: hidden; }
.demo-page {
  position: absolute; inset: 0;
  padding: 12px 18px;
  display: flex; flex-direction: column;
  opacity: 0;
  transform: translateX(24px) scale(0.98);
  transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-spring);
  pointer-events: none;
}
.demo-page.active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.demo-h { font-size: 19px; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 14px; }
.demo-h.center { text-align: center; margin-bottom: 2px; }
.demo-sub { font-size: 12px; color: var(--d-sub); }
.demo-sub.center { text-align: center; margin-bottom: 20px; }

.demo-hero-card {
  border-radius: 16px;
  padding: 18px;
  background: linear-gradient(135deg, #2997ff22, #7b5bff33), var(--d-card);
  border: 1px solid rgba(123, 91, 255, 0.25);
  display: flex; flex-direction: column;
  margin-bottom: 18px;
}
.demo-hero-card span { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); }
.demo-hero-card strong { font-size: 17px; font-weight: 800; margin-top: 4px; }
.demo-hero-card em { font-size: 12px; font-style: normal; color: var(--d-sub); }

.demo-row-title { font-size: 13px; font-weight: 700; margin-bottom: 10px; }
.demo-tiles { display: flex; gap: 10px; }
.demo-tile {
  flex: 1; aspect-ratio: 1;
  border-radius: 12px;
  transition: transform 0.25s var(--ease-spring);
  cursor: pointer;
}
.demo-tile:hover { transform: scale(1.06); }
.t1 { background: linear-gradient(135deg, #ff375f, #ff9f0a); }
.t2 { background: linear-gradient(135deg, #2997ff, #30d158); }
.t3 { background: linear-gradient(135deg, #7b5bff, #ff375f); }

.demo-art {
  width: 150px; height: 150px;
  margin: 8px auto 16px;
  border-radius: 22px;
  background: linear-gradient(135deg, #2997ff, #7b5bff 60%, #ff375f);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 16px 40px rgba(123, 91, 255, 0.35);
  transition: transform 0.4s var(--ease-spring);
}
.demo-art.playing { animation: artSpin 8s linear infinite; border-radius: 50%; }
@keyframes artSpin { to { transform: rotate(360deg); } }
.demo-art-inner { font-size: 40px; color: rgba(255,255,255,0.85); }

.demo-track { text-align: center; margin-bottom: 14px; }
.demo-track strong { display: block; font-size: 16px; font-weight: 800; }
.demo-track em { font-size: 12px; font-style: normal; color: var(--d-sub); }

.demo-progress {
  height: 4px;
  background: rgba(128, 128, 128, 0.25);
  border-radius: 100px;
  margin: 0 8px 18px;
  overflow: hidden;
}
.demo-progress i {
  display: block; height: 100%; width: 0%;
  background: var(--d-text);
  border-radius: 100px;
  transition: width 0.2s linear;
}

.demo-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
}
.demo-controls button {
  border: none;
  cursor: pointer;
  color: var(--d-text);
  background: none;
  font-size: 18px;
  transition: transform 0.2s var(--ease-spring);
}
.demo-controls button:active { transform: scale(0.88); }
.demo-play {
  width: 54px; height: 54px;
  border-radius: 50% !important;
  background: var(--accent-strong) !important;
  color: #fff !important;
  font-size: 19px !important;
  display: flex; align-items: center; justify-content: center;
}

.demo-avatar {
  width: 72px; height: 72px;
  margin: 12px auto 12px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 800; color: #fff;
}
.demo-setting {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--d-card);
  border-radius: 14px;
  padding: 13px 16px;
  margin-bottom: 10px;
  font-size: 13.5px;
  font-weight: 600;
}
.demo-toggle {
  width: 44px; height: 26px;
  border-radius: 100px;
  border: none;
  background: rgba(128,128,128,0.35);
  position: relative;
  cursor: pointer;
  transition: background 0.25s;
}
.demo-toggle.on { background: #30d158; }
.demo-toggle i {
  position: absolute;
  top: 2px; left: 2px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.25s var(--ease-spring);
  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
}
.demo-toggle.on i { transform: translateX(18px); }

.demo-tabbar {
  display: flex;
  border-top: 1px solid rgba(128,128,128,0.18);
  padding: 8px 6px 14px;
  background: var(--d-bg);
}
.demo-tab {
  flex: 1;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--d-sub);
  font-family: var(--font);
  font-size: 10px;
  font-weight: 600;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  transition: color 0.2s, transform 0.2s var(--ease-spring);
}
.demo-tab svg { width: 19px; height: 19px; }
.demo-tab.active { color: var(--accent); }
.demo-tab:active { transform: scale(0.92); }

/* ═══════════ TIMELINE ═══════════ */
.timeline {
  position: relative;
  padding-left: 36px;
  max-width: 700px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 1.5px;
  background: linear-gradient(var(--accent), var(--border));
}
.timeline-item { position: relative; padding-bottom: 48px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -36px; top: 7px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(41, 151, 255, 0.18);
}
.timeline-date {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.timeline-item h3 { font-size: 20px; font-weight: 700; margin: 6px 0 8px; letter-spacing: -0.01em; }
.timeline-item p { font-size: 15.5px; color: var(--text-secondary); }

/* ═══════════ CONTACT ═══════════ */
.contact { padding-bottom: 110px; }
.contact-title {
  font-size: clamp(38px, 6.5vw, 68px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.06;
  margin-bottom: 20px;
}
.contact-sub {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}
.contact-actions { margin-bottom: 40px; }

/* ═══════════ FOOTER ═══════════ */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ═══════════ RESPONSIVE ═══════════ */
@media (max-width: 900px) {
  .section { padding: 90px 0; }

  .about-grid, .demo-grid { grid-template-columns: 1fr; gap: 40px; }
  .bento { grid-template-columns: 1fr 1fr; }
  .bento-large { grid-column: span 2; grid-row: auto; }

  .project, .project--flip {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .project--flip .project-visual { order: 0; }
  .project--flip .project-info { order: 1; }
}

@media (max-width: 640px) {
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: flex; }

  .nav.open .nav-links {
    display: flex;
    position: absolute;
    top: 56px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(0,0,0,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
  }
  .nav.open .nav-links a {
    display: block;
    padding: 14px 24px;
    font-size: 16px;
  }

  .bento { grid-template-columns: 1fr; }
  .bento-large { grid-column: auto; }

  .hero-stats { gap: 20px; }
  .stat strong { font-size: 22px; }
  .projects { gap: 72px; }
}

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