/* ============================================================
   Ali Naderi — Warm 3D Portfolio
   Light-first cream theme · coral / gold / purple / navy
   Pure CSS 3D. No build step. GitHub Pages compatible.
   ============================================================ */

/* ---------- Tokens: WARM LIGHT (default) ---------- */
:root {
  --cream:      #fdf6ec;
  --cream-2:    #f8ebdb;
  --cream-3:    #f2e0cb;
  --surface:    #fffaf3;
  --surface-2:  #fff;

  --coral:      #f2664f;
  --coral-soft: #ff8f78;
  --gold:       #eda13c;
  --gold-soft:  #f7c46c;
  --purple:     #6f4e9c;
  --purple-soft:#9a78c9;
  --navy:       #1b2a4a;
  --navy-soft:  #33456b;

  --text:       #221a16;
  --muted:      #7a6a5f;
  --line:       rgba(27, 42, 74, .12);
  --line-warm:  rgba(242, 102, 79, .22);

  --sh-sm: 0 2px 6px rgba(27, 42, 74, .06);
  --sh-md: 0 10px 26px -8px rgba(27, 42, 74, .16), 0 3px 8px rgba(27, 42, 74, .05);
  --sh-lg: 0 26px 60px -18px rgba(27, 42, 74, .26), 0 8px 20px rgba(27, 42, 74, .07);
  --sh-glow: 0 22px 60px -20px rgba(242, 102, 79, .5);

  /* Premium 3D Card System */
  --card-depth-1: 0 4px 12px -2px rgba(27,42,74,.12), 0 2px 4px -1px rgba(27,42,74,.08);
  --card-depth-2: 0 8px 20px -4px rgba(27,42,74,.16), 0 4px 8px -2px rgba(27,42,74,.1);
  --card-depth-3: 0 14px 32px -6px rgba(27,42,74,.22), 0 6px 14px -3px rgba(27,42,74,.14);
  --card-depth-4: 0 20px 44px -8px rgba(27,42,74,.28), 0 10px 20px -4px rgba(27,42,74,.18);

  --card-inset: inset 0 1px 0 rgba(255,255,255,.6), inset 0 -1px 0 rgba(27,42,74,.06);
  --card-border: 1px solid var(--line);

  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 28px;
  --r-xl: 40px;

  --sans: 'Manrope', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'DM Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --maxw: 1180px;
  --ease: cubic-bezier(.22, .8, .3, 1);
}

/* ---------- Tokens: WARM DARK ---------- */
[data-theme="dark"] {
  --cream:      #16121b;
  --cream-2:    #1e1823;
  --cream-3:    #271f2e;
  --surface:    #221b28;
  --surface-2:  #2a2231;

  --coral:      #ff8069;
  --coral-soft: #ff9d8a;
  --gold:       #f5bb63;
  --gold-soft:  #ffd18c;
  --purple:     #b38ee6;
  --purple-soft:#c9aef0;
  --navy:       #cfd8ec;
  --navy-soft:  #aab7d4;

  --text:       #f6ece2;
  --muted:      #b3a396;
  --line:       rgba(246, 236, 226, .14);
  --line-warm:  rgba(255, 128, 105, .28);

  --sh-sm: 0 2px 6px rgba(0, 0, 0, .4);
  --sh-md: 0 12px 30px -10px rgba(0, 0, 0, .6), 0 3px 8px rgba(0, 0, 0, .3);
  --sh-lg: 0 30px 70px -22px rgba(0, 0, 0, .75), 0 8px 22px rgba(0, 0, 0, .4);
  --sh-glow: 0 22px 60px -20px rgba(255, 128, 105, .42);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--sans);
  background: var(--cream);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background .4s var(--ease), color .4s var(--ease);
}

/* Warm ambient light behind everything */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(58% 42% at 12% 4%,  rgba(242, 102, 79, .16), transparent 62%),
    radial-gradient(50% 40% at 92% 12%, rgba(237, 161, 60, .16), transparent 64%),
    radial-gradient(60% 48% at 76% 92%, rgba(111, 78, 156, .14), transparent 66%);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }

:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: var(--gold-soft); color: var(--navy); }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  background: var(--coral); color: #fff;
  padding: 10px 18px; border-radius: 0 0 var(--r-sm) var(--r-sm);
  font-weight: 700; transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- Scroll progress ---------- */
.progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 120;
  background: linear-gradient(90deg, var(--coral), var(--gold), var(--purple));
  transition: width .1s linear;
}

/* ---------- Typography ---------- */
h1, h2, h3 { line-height: 1.08; letter-spacing: -.03em; font-weight: 800; }
h1 { font-size: clamp(2.6rem, 6.4vw, 4.6rem); }
h2 { font-size: clamp(2rem, 4.4vw, 3.2rem); }
h3 { font-size: 1.25rem; letter-spacing: -.02em; }

h1 em, h2 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--coral), var(--gold) 52%, var(--purple));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--coral);
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 18px;
  font-weight: 500;
}
.eyebrow i {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 4px rgba(242, 102, 79, .2);
  animation: pulse 2.6s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1);   opacity: 1; }
  50%      { transform: scale(1.3); opacity: .65; }
}

.lede { font-size: clamp(1.02rem, 1.5vw, 1.16rem); color: var(--muted); max-width: 52ch; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 30px;
  border-radius: 100px;
  font-weight: 700; font-size: .94rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
  will-change: transform;
}
.btn span { transition: transform .3s var(--ease); }
.btn:hover span { transform: translate(3px, -3px); }

.btn-primary {
  background: linear-gradient(135deg, var(--coral), var(--gold));
  color: #fff;
  box-shadow: var(--sh-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 28px 66px -18px rgba(242, 102, 79, .62); }

.btn-outline {
  background: var(--surface-2);
  border-color: var(--line);
  color: var(--text);
  box-shadow: var(--sh-sm);
}
.btn-outline:hover { transform: translateY(-3px); box-shadow: var(--sh-md); border-color: var(--coral); }

.text-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: .93rem;
  padding-bottom: 3px;
  border-bottom: 2px solid var(--line-warm);
  transition: border-color .25s var(--ease), color .25s var(--ease), gap .25s var(--ease);
}
.text-link:hover { border-color: var(--coral); color: var(--coral); gap: 12px; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px;
  padding-block: 15px;
  margin-bottom: 8px;
  background: var(--cream); /* fallback */
  background: color-mix(in srgb, var(--cream) 86%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .12em; font-size: .82rem; }
.brand-mark {
  display: grid; place-items: center;
  width: 42px; height: 42px;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--coral), var(--gold) 55%, var(--purple));
  color: #fff; font-size: .84rem; letter-spacing: 0;
  box-shadow: var(--sh-md);
  transform: rotate(-6deg);
  transition: transform .4s var(--ease);
}
.brand:hover .brand-mark { transform: rotate(6deg) scale(1.07); }
.brand-mark span { opacity: .75; }

.nav-links { display: flex; gap: 30px; font-weight: 600; font-size: .92rem; }
.nav-links a { position: relative; padding-block: 6px; color: var(--muted); transition: color .25s var(--ease); }
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
  transition: width .3s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 12px; }

.icon-btn {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--line);
  box-shadow: var(--sh-sm);
  cursor: pointer; font-size: 1.05rem;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.icon-btn:hover { transform: translateY(-2px) rotate(18deg); box-shadow: var(--sh-md); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 100px;
  background: var(--navy); color: var(--cream);
  font-weight: 700; font-size: .87rem;
  box-shadow: var(--sh-md);
  transition: transform .3s var(--ease), background .3s var(--ease);
}
[data-theme="dark"] .nav-cta { background: linear-gradient(135deg, var(--coral), var(--gold)); color: #2a1b16; }
.nav-cta:hover { transform: translateY(-2px); }

.menu-btn {
  display: none;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  cursor: pointer; font-size: 1.1rem;
}

/* ============================================================
   HERO — layered CSS 3D
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 60px;
  align-items: center;
  padding-block: clamp(48px, 8vw, 96px) clamp(40px, 6vw, 76px);
}

.nameplate {
  font-family: var(--mono);
  font-size: .7rem; letter-spacing: .22em;
  color: var(--muted);
  margin-bottom: 14px;
}
.nameplate span { color: var(--gold); }

.hero h1 { margin-bottom: 22px; }

.hero-actions {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 16px 26px;
  margin-block: 34px 30px;
}

.hero-meta {
  display: flex; flex-wrap: wrap; gap: 12px 30px;
  font-size: .84rem; color: var(--muted);
  padding-top: 24px;
  border-top: 1px dashed var(--line);
}
.hero-meta b {
  font-family: var(--mono); color: var(--coral);
  margin-right: 6px; font-weight: 500;
}

/* ---- 3D stage ---- */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  min-height: 380px;
  display: grid; place-items: center;
  perspective: 1100px;
  perspective-origin: 50% 45%;
}

/* Soft warm glow pad behind the rings */
.hero-visual::before {
  content: '';
  position: absolute; inset: 12%;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 32%, rgba(247, 196, 108, .5), rgba(242, 102, 79, .26) 46%, transparent 68%);
  filter: blur(28px);
}

.stage {
  position: relative;
  width: min(100%, 420px);
  aspect-ratio: 1 / 1;
  transform-style: preserve-3d;
  transform: rotateX(62deg) rotateZ(0deg);
  animation: stage-spin 34s linear infinite;
}
@keyframes stage-spin {
  to { transform: rotateX(62deg) rotateZ(360deg); }
}

/* Layered 3D rings */
.ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 2px solid var(--coral);
  transform-style: preserve-3d;
}
.ring-1 {
  inset: 4%;
  border-color: var(--coral); /* fallback */
  border-color: color-mix(in srgb, var(--coral) 68%, transparent);
  box-shadow: 0 0 26px -6px rgba(242, 102, 79, .55), inset 0 0 22px -8px rgba(242, 102, 79, .4);
}
.ring-2 {
  inset: 17%;
  border-color: var(--gold); /* fallback */
  border-color: color-mix(in srgb, var(--gold) 72%, transparent);
  border-style: dashed;
  transform: translateZ(38px);
  box-shadow: 0 0 24px -8px rgba(237, 161, 60, .55);
}
.ring-3 {
  inset: 30%;
  border-color: var(--purple); /* fallback */
  border-color: color-mix(in srgb, var(--purple) 70%, transparent);
  transform: translateZ(76px);
  box-shadow: 0 0 26px -8px rgba(111, 78, 156, .5);
}
.ring-4 {
  inset: -6%;
  border-width: 1px;
  border-color: var(--navy); /* fallback */
  border-color: color-mix(in srgb, var(--navy) 26%, transparent);
  transform: translateZ(-34px);
}

/* Orbiting nodes ride the rings */
.orbit-node {
  position: absolute;
  width: 15px; height: 15px;
  border-radius: 50%;
  top: 50%; left: 50%;
  margin: -7.5px 0 0 -7.5px;
  background: var(--gold);
  box-shadow: 0 0 16px 2px rgba(237, 161, 60, .7);
}
.orbit-node.n1 { background: var(--coral);  transform: rotate(0deg)   translateX(46%) translateZ(6px); }
.orbit-node.n2 { background: var(--gold);   transform: rotate(118deg) translateX(40%) translateZ(40px); }
.orbit-node.n3 { background: var(--purple); transform: rotate(236deg) translateX(32%) translateZ(78px); }
.orbit-node.n4 { background: var(--coral-soft); width: 10px; height: 10px; transform: rotate(300deg) translateX(50%) translateZ(-20px); }

/* Floating AI core — counter-rotates so it always faces the viewer */
.ai-core {
  position: absolute;
  top: 50%; left: 50%;
  width: 148px; height: 148px;
  margin: -74px 0 0 -74px;
  display: grid; place-items: center; gap: 2px;
  border-radius: 34px;
  text-align: center;
  background: linear-gradient(150deg, var(--surface-2), var(--cream-2));
  border: 1px solid var(--line-warm);
  box-shadow: var(--sh-lg), inset 0 1px 0 rgba(255, 255, 255, .7);
  transform: translateZ(120px) rotateX(-62deg);
  animation: core-float 6.5s var(--ease) infinite;
}
[data-theme="dark"] .ai-core { box-shadow: var(--sh-lg), inset 0 1px 0 rgba(255, 255, 255, .06); }

@keyframes core-float {
  0%, 100% { transform: translateZ(120px) rotateX(-62deg) translateY(0); }
  50%      { transform: translateZ(150px) rotateX(-62deg) translateY(-6px); }
}

.ai-core b {
  font-size: 2.1rem; letter-spacing: -.04em; line-height: 1;
  background: linear-gradient(135deg, var(--coral), var(--gold) 50%, var(--purple));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.ai-core small {
  font-family: var(--mono);
  font-size: .55rem; letter-spacing: .16em;
  color: var(--muted); line-height: 1.5;
}

/* Floating info chips (flat, above the stage) */
.chip {
  position: absolute; z-index: 3;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: 100px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  box-shadow: var(--sh-md);
  font-size: .74rem; font-weight: 700;
  white-space: nowrap;
  animation: chip-bob 5.5s var(--ease) infinite;
}
.chip i { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.chip-1 { top: 6%;  left: -2%;  }
.chip-1 i { background: var(--coral); }
.chip-2 { top: 42%; right: -4%; animation-delay: -1.8s; }
.chip-2 i { background: var(--gold); }
.chip-3 { bottom: 8%; left: 4%;  animation-delay: -3.4s; }
.chip-3 i { background: var(--purple); }

@keyframes chip-bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-11px); }
}

/* ---------- Ticker ---------- */
.ticker {
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(242,102,79,.09), rgba(237,161,60,.09), rgba(111,78,156,.09));
  padding-block: 15px;
  margin-bottom: 20px;
}
.ticker-inner {
  display: flex; gap: 40px; align-items: center;
  width: max-content;
  font-family: var(--mono);
  font-size: .78rem; letter-spacing: .18em;
  color: var(--navy);
  animation: slide 26s linear infinite;
}
[data-theme="dark"] .ticker-inner { color: var(--text); }
.ticker-inner b { color: var(--coral); }
@keyframes slide { to { transform: translateX(-50%); } }
.ticker:hover .ticker-inner { animation-play-state: paused; }

/* ---------- Sections ---------- */
.section { padding-block: clamp(60px, 8vw, 104px); }
.section-head { margin-bottom: 52px; max-width: 720px; }
.section-head.split {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 30px; max-width: none;
}
.section-note { color: var(--muted); max-width: 34ch; font-size: .94rem; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 46px; }
.big-copy { font-size: clamp(1.2rem, 2.1vw, 1.55rem); font-weight: 600; letter-spacing: -.02em; margin-bottom: 26px; }
.about-details p { color: var(--muted); margin-bottom: 28px; }

.detail-row {
  display: grid; grid-template-columns: 130px 1fr; gap: 18px;
  padding-block: 20px;
  border-top: 1px solid var(--line);
}
.detail-row span {
  font-family: var(--mono); font-size: .7rem;
  letter-spacing: .16em; text-transform: uppercase; color: var(--coral);
}
.detail-row strong { font-weight: 700; line-height: 1.5; }

/* ---------- Skills (Premium 3D Cards - Medium Depth) ---------- */
.skills-section { background: var(--cream-2); border-block: 1px solid var(--line); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 22px;
}

.skill-card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--r-lg);
  background: linear-gradient(145deg, var(--surface-2), var(--cream-3));
  border: var(--card-border);
  box-shadow: var(--card-depth-2), var(--card-inset);
  overflow: hidden;
  transition: transform .42s var(--ease), box-shadow .42s var(--ease), border-color .3s var(--ease);
  will-change: transform;
  transform-style: preserve-3d;
  perspective: 900px;
}
.skill-card::before {
  content: '';
  position: absolute; inset: 0 0 auto 0; height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
  z-index: 1;
}
.skill-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(255,255,255,.35) 0%, transparent 45%, rgba(242,102,79,.04) 100%);
  pointer-events: none;
  z-index: 0;
}
.skill-card:hover {
  transform: translateY(-9px) rotateX(1.5deg) rotateY(0.8deg);
  box-shadow: var(--card-depth-3), var(--card-inset);
  border-color: var(--coral-soft);
}
.skill-card:hover::before { transform: scaleX(1); }

[data-theme="dark"] .skill-card {
  background: linear-gradient(145deg, var(--surface-2), var(--cream-3));
}

.skill-card.featured {
  background: linear-gradient(150deg, var(--navy), var(--navy-soft));
  border-color: transparent;
  color: #fdf6ec;
}
[data-theme="dark"] .skill-card.featured {
  background: linear-gradient(150deg, var(--purple), #4c3470);
  color: #fff;
}
.skill-card.featured .skill-num { color: var(--gold-soft); }
.skill-card.featured .tags span { background: rgba(255, 255, 255, .14); color: #fff; border-color: rgba(255, 255, 255, .18); }

.skill-num {
  font-family: var(--mono); font-size: .72rem;
  letter-spacing: .16em; color: var(--coral); display: block; margin-bottom: 14px;
}
.skill-card h3 { margin-bottom: 16px; }

.tags, .project-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tags span, .project-tags span {
  font-size: .72rem; font-weight: 600;
  padding: 6px 13px;
  border-radius: 100px;
  background: var(--cream-2);
  border: 1px solid var(--line);
  color: var(--muted);
}

/* ---------- Projects (Premium 3D Cards - Strongest Depth) ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 26px;
}

.project-card {
  display: flex; flex-direction: column;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: linear-gradient(150deg, var(--surface-2) 0%, var(--cream-3) 100%);
  border: var(--card-border);
  box-shadow: var(--card-depth-3), var(--card-inset);
  transition: transform .48s cubic-bezier(.23,.9,.32,1), box-shadow .48s var(--ease), border-color .3s var(--ease);
  will-change: transform;
  transform-style: preserve-3d;
  perspective: 1200px;
  position: relative;
}
.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, rgba(255,255,255,.4) 0%, transparent 35%, rgba(242,102,79,.05) 100%);
  z-index: 1;
  pointer-events: none;
  border-radius: var(--r-xl);
}
.project-card:hover {
  transform: translateY(-12px) rotateX(2.2deg) rotateY(1.4deg);
  box-shadow: var(--card-depth-4), var(--card-inset);
  border-color: var(--coral);
}
.project-large { grid-column: span 2; }

.project-art {
  position: relative;
  min-height: 210px;
  display: grid; place-items: center;
  overflow: hidden;
  color: #fff;
}
.project-large .project-art { min-height: 280px; }

.art-label {
  position: absolute; top: 16px; left: 18px;
  font-family: var(--mono); font-size: .62rem;
  letter-spacing: .18em;
  padding: 6px 12px; border-radius: 100px;
  background: rgba(255, 255, 255, .2);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.art-bearing { background: linear-gradient(140deg, #f2664f, #eda13c); }
.art-medical { background: linear-gradient(140deg, #6f4e9c, #9a78c9); }
.art-agri    { background: linear-gradient(140deg, #1b2a4a, #33456b); }
.art-farm    { background: linear-gradient(140deg, #eda13c, #f7c46c); }
.art-traffic { background: linear-gradient(140deg, #33456b, #6f4e9c); }
.art-heart   { background: linear-gradient(140deg, #f2664f, #9a78c9); }
.art-cancer  { background: linear-gradient(140deg, #9a78c9, #f2664f); }

/* Decorative art motifs — all CSS, no images */
.art-orb {
  width: 108px; height: 108px; border-radius: 50%;
  background: rgba(255, 255, 255, .18);
  border: 2px solid rgba(255, 255, 255, .45);
  box-shadow: inset 0 8px 26px rgba(255, 255, 255, .3), 0 16px 34px -12px rgba(0, 0, 0, .4);
  display: grid; place-items: center;
  font-weight: 800; font-size: 1.5rem;
  animation: chip-bob 6s var(--ease) infinite;
}
.art-rings { position: absolute; inset: 0; }
.art-rings::before, .art-rings::after {
  content: ''; position: absolute;
  border: 1.5px solid rgba(255, 255, 255, .3);
  border-radius: 50%;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
}
.art-rings::before { width: 190px; height: 190px; }
.art-rings::after  { width: 260px; height: 260px; border-style: dashed; }

.art-bars { display: flex; align-items: flex-end; gap: 9px; height: 92px; }
.art-bars i {
  width: 15px; border-radius: 6px 6px 0 0;
  background: rgba(255, 255, 255, .75);
  animation: bar-rise 2.4s var(--ease) infinite alternate;
}
.art-bars i:nth-child(1) { height: 42%; animation-delay: 0s; }
.art-bars i:nth-child(2) { height: 74%; animation-delay: .2s; }
.art-bars i:nth-child(3) { height: 54%; animation-delay: .4s; }
.art-bars i:nth-child(4) { height: 92%; animation-delay: .6s; }
.art-bars i:nth-child(5) { height: 64%; animation-delay: .8s; }
@keyframes bar-rise { to { transform: scaleY(.62); } }

.art-pulse {
  font-size: 2.6rem;
  animation: beat 1.8s var(--ease) infinite;
  filter: drop-shadow(0 8px 18px rgba(0, 0, 0, .3));
}
@keyframes beat {
  0%, 100% { transform: scale(1); }
  22%      { transform: scale(1.16); }
  40%      { transform: scale(1); }
}

.art-stat { text-align: center; font-weight: 800; font-size: 2.1rem; letter-spacing: -.03em; }
.art-stat small {
  display: block;
  font-family: var(--mono); font-size: .58rem;
  letter-spacing: .18em; font-weight: 400; opacity: .85; margin-top: 4px;
}

.art-grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .16) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at 50% 50%, #000 30%, transparent 76%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 30%, transparent 76%);
}

.project-body { padding: 26px; display: flex; flex-direction: column; gap: 13px; flex: 1; }
.project-top {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-family: var(--mono); font-size: .66rem;
  letter-spacing: .14em; color: var(--muted);
}
.status {
  padding: 4px 11px; border-radius: 100px;
  background: rgba(242, 102, 79, .12);
  color: var(--coral); font-weight: 500;
}
.project-body p { color: var(--muted); font-size: .93rem; flex: 1; }
.project-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: .89rem; color: var(--coral);
  margin-top: 6px; transition: gap .25s var(--ease);
}
.project-link:hover { gap: 13px; }
.project-actions {
  display: flex; gap: 18px; flex-wrap: wrap; margin-top: 8px;
}
.project-link.github {
  color: var(--navy);
  font-size: .84rem;
}
[data-theme="dark"] .project-link.github { color: var(--purple-soft); }

/* ---------- Research band ---------- */
.research-band {
  background: linear-gradient(150deg, var(--navy), var(--navy-soft));
  color: #fdf6ec;
  padding-block: clamp(60px, 8vw, 100px);
  border-radius: var(--r-xl);
  margin-inline: 16px;
  box-shadow: var(--sh-lg);
}
[data-theme="dark"] .research-band { background: linear-gradient(150deg, #2c2135, #3b2c48); }
.research-band .eyebrow { color: var(--gold-soft); }
.research-band .eyebrow i { background: var(--gold-soft); box-shadow: 0 0 0 4px rgba(247, 196, 108, .22); }
.research-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.research-lede { margin-top: 20px; opacity: .8; }
.research-content p { opacity: .85; margin-bottom: 26px; }
.research-content ul { list-style: none; display: grid; gap: 14px; margin-bottom: 30px; }
.research-content li { display: flex; align-items: center; gap: 14px; font-weight: 600; }
.research-content li span {
  font-family: var(--mono); font-size: .7rem;
  color: var(--gold-soft);
  border: 1px solid rgba(247, 196, 108, .34);
  padding: 4px 9px; border-radius: 8px;
}

.paper {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 26px;
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(255,255,255,.12), rgba(255,255,255,.04));
  border: 1px solid rgba(255,255,255,.22);
  box-shadow: var(--card-depth-2), inset 0 1px 0 rgba(255,255,255,.25);
  transition: transform .42s var(--ease), box-shadow .42s var(--ease);
  transform-style: preserve-3d;
  will-change: transform;
}
.paper:hover {
  transform: translateY(-6px) rotateX(1.2deg);
  box-shadow: var(--card-depth-3), inset 0 1px 0 rgba(255,255,255,.25);
}
.paper-icon {
  display: grid; place-items: center; flex: none;
  width: 44px; height: 44px; border-radius: 13px;
  background: linear-gradient(135deg, var(--coral), var(--gold));
  font-weight: 800;
  box-shadow: var(--sh-sm);
}
.paper small { font-family: var(--mono); font-size: .64rem; letter-spacing: .14em; opacity: .78; color: var(--gold-soft); }
.paper strong { display: block; margin-block: 5px; font-size: 1.02rem; color: #fff; }
.paper p { opacity: .82; font-size: .87rem; margin: 0; color: rgba(253,246,236,.85); }

/* ---------- Community / Kaggle ---------- */
.community-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 26px; align-items: stretch; }

.kaggle-card {
  padding: 40px;
  border-radius: var(--r-xl);
  background: var(--surface-2);
  border: 1px solid var(--line);
  box-shadow: var(--sh-md);
}
.kaggle-title { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.kaggle-mark {
  display: grid; place-items: center; flex: none;
  width: 62px; height: 62px; border-radius: 20px;
  background: linear-gradient(140deg, var(--purple), var(--coral));
  color: #fff; font-weight: 800; font-size: 1.5rem;
  box-shadow: var(--sh-md);
  transform: rotate(-8deg);
}
.kaggle-card > p { color: var(--muted); margin-bottom: 26px; }
.profile-handle {
  margin-top: 26px; padding-top: 20px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono); font-size: .68rem;
  letter-spacing: .16em; color: var(--muted);
}
.profile-handle strong { color: var(--coral); }

.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.stats-grid div {
  display: grid; place-content: center; gap: 2px; text-align: center;
  padding: 26px 16px;
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, var(--surface-2), var(--cream-3));
  border: var(--card-border);
  box-shadow: var(--card-depth-2), var(--card-inset);
  transition: transform .38s var(--ease), box-shadow .38s var(--ease);
  transform-style: preserve-3d;
}
.stats-grid div:hover {
  transform: translateY(-7px) rotateX(1.8deg);
  box-shadow: var(--card-depth-3), var(--card-inset);
}
.stats-grid .stat-label {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .18em;
  color: var(--muted); margin-bottom: 2px;
}
.stats-grid strong {
  font-size: 1.45rem; letter-spacing: -.02em; line-height: 1.1;
  color: var(--text); font-weight: 700;
}

/* ---------- GitHub repos (Medium 3D Depth) ---------- */
.github-section { background: var(--cream-2); border-block: 1px solid var(--line); }
.repo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }

.repo {
  display: flex; flex-direction: column; gap: 9px;
  padding: 26px;
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, var(--surface-2), var(--cream-3));
  border: var(--card-border);
  box-shadow: var(--card-depth-2), var(--card-inset);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .3s var(--ease);
  transform-style: preserve-3d;
}
.repo:hover {
  transform: translateY(-8px) rotateX(1.8deg);
  box-shadow: var(--card-depth-3), var(--card-inset);
  border-color: var(--coral);
}
.repo-icon {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(140deg, var(--coral), var(--gold));
  color: #fff; font-size: 1.05rem;
  box-shadow: var(--sh-sm);
}
.repo p { color: var(--muted); font-size: .87rem; flex: 1; }
.repo small {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono); font-size: .64rem;
  letter-spacing: .12em; color: var(--muted);
  padding-top: 12px; border-top: 1px solid var(--line);
}
.repo small i { font-style: normal; color: var(--coral); }

/* ---------- Timeline (Subtle 3D) ---------- */
.timeline { position: relative; padding-left: 40px; }
.timeline-line {
  position: absolute; left: 9px; top: 6px; bottom: 6px;
  width: 2px; border-radius: 2px;
  background: linear-gradient(var(--coral), var(--gold), var(--purple));
}
.timeline-item {
  position: relative; display: grid; gap: 10px;
  background: var(--surface-2);
  border: var(--card-border);
  border-radius: var(--r-lg);
  padding: 26px 26px 22px;
  box-shadow: var(--card-depth-1), var(--card-inset);
  transition: transform .38s var(--ease), box-shadow .38s var(--ease);
}
.timeline-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-depth-2), var(--card-inset);
}
.timeline-dot {
  position: absolute; left: -38px; top: 32px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--surface-2);
  border: 3px solid var(--coral);
  box-shadow: 0 0 0 5px rgba(242, 102, 79, .14), var(--sh-sm);
  z-index: 2;
}
.timeline-year { font-family: var(--mono); font-size: .7rem; letter-spacing: .16em; color: var(--coral); }
.timeline-item p { color: var(--muted); margin-block: 6px 12px; }

/* ---------- Contact (Soft Glass 3D) ---------- */
.contact { padding-block: clamp(60px, 8vw, 104px); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-grid > div > p { color: var(--muted); margin-block: 18px 28px; max-width: 42ch; }
.contact-links { display: grid; gap: 12px; }
.contact-links a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 17px 22px;
  border-radius: var(--r-md);
  background: linear-gradient(145deg, var(--surface-2), var(--cream-3));
  border: var(--card-border);
  box-shadow: var(--card-depth-2), var(--card-inset);
  font-weight: 600;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.contact-links a:hover { transform: translateX(7px); box-shadow: var(--card-depth-3); border-color: var(--coral); color: var(--coral); }

.contact-form {
  display: grid; gap: 16px;
  padding: 34px;
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, var(--surface-2) 0%, var(--cream-3) 100%);
  border: var(--card-border);
  box-shadow: var(--card-depth-3), var(--card-inset);
  transform-style: preserve-3d;
}
.contact-form label {
  display: grid; gap: 8px;
  font-family: var(--mono); font-size: .68rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.contact-form input, .contact-form textarea {
  padding: 14px 16px;
  border-radius: var(--r-sm);
  background: var(--cream);
  border: 1px solid var(--line);
  font-family: var(--sans); font-size: .94rem;
  letter-spacing: normal; text-transform: none;
  color: var(--text);
  resize: vertical;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(242, 102, 79, .14);
}
.contact-form .btn { justify-content: center; margin-top: 6px; }
.form-note { font-size: .84rem; color: var(--coral); min-height: 20px; font-weight: 600; }

/* ---------- Footer ---------- */
.footer {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 18px;
  padding-block: 36px;
  border-top: 1px solid var(--line);
  color: var(--muted); font-size: .86rem;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }
.delay-1 { transition-delay: .1s; }
.delay-2 { transition-delay: .2s; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { order: -1; min-height: 330px; max-width: 420px; margin-inline: auto; }
  .about-grid, .research-grid, .contact-grid, .community-grid { grid-template-columns: 1fr; }
  .project-large { grid-column: span 1; }
  .section-head.split { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 760px) {
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0;
    padding: 10px 24px 20px;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--sh-md);
    display: none;
  }
  .nav.open .nav-links { display: flex; }
  .nav-links a { padding-block: 13px; border-bottom: 1px solid var(--line); }
  .menu-btn { display: grid; place-items: center; }
  .nav-cta { display: none; }

  .research-band { margin-inline: 0; border-radius: var(--r-lg); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .kaggle-card, .contact-form { padding: 26px; }
  .detail-row { grid-template-columns: 1fr; gap: 6px; }
  .chip { font-size: .68rem; padding: 8px 13px; }
  .chip-1 { left: -8px; }
  .chip-2 { right: -8px; }

  /* Mobile 3D adjustments */
  .skill-card, .project-card, .paper, .repo, .stats-grid div, .timeline-item {
    transform: none !important;
  }
  .skill-card:hover, .project-card:hover, .paper:hover, .repo:hover, .stats-grid div:hover, .timeline-item:hover {
    transform: translateY(-4px) !important;
  }
}

@media (max-width: 420px) {
  .hero-actions { gap: 14px; }
  .hero-actions .btn, .hero-actions .text-link { width: 100%; justify-content: center; }
  .ai-core { width: 124px; height: 124px; margin: -62px 0 0 -62px; }
  .ai-core b { font-size: 1.7rem; }
}

/* ---------- Accessibility: reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .stage { transform: rotateX(58deg); }
}

/* ---------- Print ---------- */
@media print {
  .nav, .progress, .ticker, .contact-form, .chip { display: none !important; }
  body { background: #fff; color: #000; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- About portrait ---------- */
.about-portrait {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-bottom: 30px;
  border: var(--card-border);
  box-shadow: var(--card-depth-3), var(--card-inset);
  transform: rotate(-1.4deg);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}

.about-portrait:hover {
  transform: rotate(0deg) translateY(-6px);
  box-shadow: var(--card-depth-4), var(--card-inset);
}

.about-portrait img {
  width: 100%;
  height: auto;
  display: block;
}

.about-portrait::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, rgba(255,255,255,.18) 0%, transparent 40%, rgba(242,102,79,.16) 100%);
}

[data-theme="dark"] .about-portrait::after {
  background: linear-gradient(155deg, rgba(255,255,255,.05) 0%, transparent 40%, rgba(255,128,105,.14) 100%);
}

@media (max-width: 980px) {
  .about-portrait { max-width: 420px; margin-inline: auto; }
}

@media (max-width: 760px) {
  .about-portrait { transform: none; }
  .about-portrait:hover { transform: translateY(-4px); }
}