:root {
  --bg: #080a12;
  --bg-soft: #0e1120;
  --card: rgba(20, 24, 42, 0.62);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #eef1ff;
  --text-dim: #9aa3c0;
  --accent: #6f8bff;
  --accent-2: #b06bff;
  --accent-3: #39d8d0;
  --shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.85);
  --radius: 20px;
  --max: 1120px;
}

html[data-theme="light"] {
  --bg: #f4f6fd;
  --bg-soft: #ffffff;
  --card: rgba(255, 255, 255, 0.78);
  --card-border: rgba(16, 22, 48, 0.09);
  --text: #12162a;
  --text-dim: #5a6486;
  --shadow: 0 24px 50px -30px rgba(30, 40, 90, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

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

/* ---------- background ---------- */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  width: 46vw;
  height: 46vw;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  animation: drift 22s ease-in-out infinite alternate;
}

.blob-a { background: #3a56ff; top: -12vw; left: -8vw; }
.blob-b { background: #a54bff; bottom: -18vw; right: -10vw; animation-delay: -7s; }
.blob-c { background: #14cfc4; top: 28vh; left: 42vw; width: 30vw; height: 30vw; opacity: 0.32; animation-delay: -13s; }

html[data-theme="light"] .blob { opacity: 0.3; }

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 10%, transparent 72%);
}

html[data-theme="light"] .grid-overlay {
  background-image:
    linear-gradient(to right, rgba(20, 30, 70, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 30, 70, 0.06) 1px, transparent 1px);
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4vw, 6vh, 0) scale(1.12); }
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px clamp(20px, 5vw, 56px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.nav.scrolled { border-bottom-color: var(--card-border); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.01em;
  font-size: 1.05rem;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  box-shadow: 0 0 16px var(--accent);
}

.nav-links {
  display: flex;
  gap: 4px;
  padding: 5px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--card-border);
}

.nav-links a {
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  transform: translateY(-1px);
}

/* ---------- layout ---------- */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 32px);
}

.section { padding: clamp(64px, 9vw, 110px) 0 0; }

.section-head { margin-bottom: 30px; }

.tag {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* ---------- hero ---------- */
.hero {
  max-width: 860px;
  padding: clamp(56px, 10vw, 120px) 0 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  padding: 6px 14px 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  background: var(--card);
  font-size: 0.82rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.pulse {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-3);
}

.pulse::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--accent-3);
  animation: ping 1.8s ease-out infinite;
}

@keyframes ping {
  0% { transform: scale(0.7); opacity: 0.9; }
  100% { transform: scale(2.1); opacity: 0; }
}

.hero-title {
  margin: 0 0 22px;
  font-size: clamp(2.4rem, 6.4vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 800;
}

.grad {
  background: linear-gradient(100deg, var(--accent) 10%, var(--accent-2) 52%, var(--accent-3) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 620px;
  margin: 0 0 34px;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  color: var(--text-dim);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 34px -14px color-mix(in srgb, var(--accent) 85%, transparent);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 42px -14px color-mix(in srgb, var(--accent) 95%, transparent); }

.btn-ghost {
  color: var(--text);
  background: var(--card);
  border-color: var(--card-border);
}

.btn-ghost:hover { border-color: color-mix(in srgb, var(--accent) 45%, transparent); transform: translateY(-2px); }

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 56px 0 0;
  padding: 0;
}

.stats div {
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.stats dt {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.stats dd {
  margin: 4px 0 0;
  font-size: 0.86rem;
  color: var(--text-dim);
}

/* ---------- cards ---------- */
.card {
  padding: 26px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 35%, var(--card-border)); }

.card h3 { margin: 0 0 10px; font-size: 1.06rem; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--text-dim); font-size: 0.94rem; }

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

/* ---------- work ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 18px;
}

.work-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.work-card:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--accent) 38%, var(--card-border)); }

.work-thumb {
  height: 132px;
  position: relative;
  background-size: 200% 200%;
  animation: shift 12s ease infinite alternate;
}

.thumb-a { background-image: linear-gradient(120deg, #3a56ff, #a54bff 55%, #14cfc4); }
.thumb-b { background-image: linear-gradient(120deg, #14cfc4, #3a56ff 60%, #6f8bff); }
.thumb-c { background-image: linear-gradient(120deg, #a54bff, #ff6f91 55%, #3a56ff); }

.work-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.5;
}

@keyframes shift {
  from { background-position: 0% 0%; }
  to { background-position: 100% 100%; }
}

.work-body { padding: 20px 22px 22px; }

.work-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.work-top h3 { margin: 0; font-size: 1.04rem; }

.chip {
  flex: none;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-3);
  border: 1px solid color-mix(in srgb, var(--accent-3) 40%, transparent);
  background: color-mix(in srgb, var(--accent-3) 12%, transparent);
}

.work-body p { margin: 0 0 14px; font-size: 0.92rem; color: var(--text-dim); }

.work-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.work-tags span {
  padding: 3px 10px;
  border-radius: 8px;
  font-size: 0.76rem;
  color: var(--text-dim);
  background: color-mix(in srgb, var(--text) 6%, transparent);
  border: 1px solid var(--card-border);
}

/* ---------- stack ---------- */
.stack-wrap {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: grid;
  gap: 26px;
}

.stack-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 20px;
  align-items: start;
}

.stack-label {
  font-size: 0.86rem;
  color: var(--text-dim);
  padding-top: 2px;
}

.bars { display: grid; gap: 14px; }

.bar {
  position: relative;
  height: 30px;
  border-radius: 9px;
  background: color-mix(in srgb, var(--text) 7%, transparent);
  overflow: hidden;
}

.bar span {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  border-radius: 9px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 55%, transparent), color-mix(in srgb, var(--accent-2) 60%, transparent));
  transition: width 1.1s cubic-bezier(0.22, 1, 0.36, 1);
}

.bar em {
  position: relative;
  z-index: 1;
  display: block;
  padding: 4px 12px;
  font-style: normal;
  font-size: 0.82rem;
  color: var(--text);
}

/* ---------- contact ---------- */
.contact { padding-bottom: clamp(60px, 8vw, 100px); }

.contact-card {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(40px, 6vw, 70px) clamp(24px, 5vw, 60px);
  border-radius: 28px;
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.contact-card::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  top: -260px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 55%, transparent), transparent 65%);
  filter: blur(30px);
  pointer-events: none;
}

.contact-card h2 {
  position: relative;
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  letter-spacing: -0.025em;
}

.contact-card p {
  position: relative;
  margin: 0 auto 30px;
  max-width: 460px;
  color: var(--text-dim);
}

.contact-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ---------- footer ---------- */
.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px clamp(20px, 5vw, 32px) 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 0.84rem;
  color: var(--text-dim);
  border-top: 1px solid var(--card-border);
}

.footer-sep { opacity: 0.5; }

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .blob, .work-thumb, .pulse::after { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .nav-links { display: none; }
  .stats { grid-template-columns: 1fr; }
  .stack-row { grid-template-columns: 1fr; gap: 10px; }
  .footer { justify-content: center; text-align: center; }
}

@media (max-width: 420px) {
  .hero-actions .btn { flex: 1 1 100%; }
}