/* =========================
   Design tokens
   ========================= */
:root {
  --bg: #0b1020;
  --bg-2: #0f172a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.18);
  --text: #e6edf7;
  --text-dim: #9aa6b8;
  --text-mute: #6b7689;
  --accent: #6ea8ff;
  --accent-2: #7c5cff;
  --accent-3: #38e1c0;
  --success: #4ade80;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
  --bg: #f6f8fc;
  --bg-2: #ffffff;
  --surface: rgba(10, 20, 50, 0.04);
  --surface-2: rgba(10, 20, 50, 0.07);
  --border: rgba(10, 20, 50, 0.10);
  --border-strong: rgba(10, 20, 50, 0.22);
  --text: #0b1020;
  --text-dim: #3b4a63;
  --text-mute: #6b7689;
  --accent: #2f6df3;
  --accent-2: #6d4dff;
  --accent-3: #14b8a6;
}

/* =========================
   Reset
   ========================= */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: radial-gradient(ellipse at top, var(--bg-2), var(--bg) 60%);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg { display: block; max-width: 100%; }
ul { list-style: none; }

/* =========================
   Animated background
   ========================= */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}
.bg-glow {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(600px 400px at 10% 10%, rgba(110,168,255,0.18), transparent 60%),
    radial-gradient(500px 380px at 90% 30%, rgba(124,92,255,0.18), transparent 60%),
    radial-gradient(700px 500px at 50% 100%, rgba(56,225,192,0.10), transparent 60%);
  pointer-events: none;
  animation: glow 18s ease-in-out infinite alternate;
}
@keyframes glow {
  0%   { transform: translate(0,0); }
  100% { transform: translate(-2%, 2%); }
}

/* =========================
   Nav
   ========================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 24px;
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav__logo { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.nav__logo-mark {
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  font-family: var(--mono);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  box-shadow: 0 4px 12px rgba(110, 168, 255, 0.35);
}
.nav__links { display: flex; gap: 6px; }
.nav__links a {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-dim);
  transition: color .2s, background .2s;
}
.nav__links a:hover { color: var(--text); background: var(--surface); }
.nav__theme {
  display: grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: 8px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  transition: all .2s;
}
.nav__theme:hover { color: var(--text); background: var(--surface); }

/* =========================
   Hero
   ========================= */
.hero {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  padding: 80px 24px 60px;
  text-align: center;
}
.hero__avatar {
  position: relative;
  width: 96px; height: 96px;
  margin: 0 auto 24px;
}
.hero__avatar-inner {
  position: relative; z-index: 2;
  display: grid; place-items: center;
  width: 100%; height: 100%;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 32px; font-weight: 700;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px rgba(110, 168, 255, 0.4);
}
.hero__avatar-ring {
  position: absolute; inset: -6px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  opacity: 0.6;
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50%      { transform: scale(1.08); opacity: 0.2; }
}
.hero__greeting { color: var(--accent); font-family: var(--mono); font-size: 15px; }
.hero__name {
  margin-top: 8px;
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text), var(--text-dim));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__role {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: clamp(16px, 2.4vw, 20px);
  color: var(--accent-3);
  min-height: 1.6em;
}
.hero__cursor { animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero__bio {
  margin: 24px auto 0;
  max-width: 620px;
  color: var(--text-dim);
  font-size: 17px;
}
.hero__badge {
  display: inline-block;
  margin-left: 8px;
  padding: 4px 12px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent-3);
  background: color-mix(in srgb, var(--accent-3) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent-3) 40%, transparent);
  border-radius: 999px;
  white-space: nowrap;
  animation: pulse-badge 2.4s ease-in-out infinite;
}
@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-3) 40%, transparent); }
  50%      { box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-3) 0%, transparent); }
}
.about__open {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent-3) !important;
}
.about__open::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 0 0 var(--accent-3);
  animation: dot-pulse 1.8s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}
.hero__cta {
  margin-top: 28px;
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform .2s var(--ease), box-shadow .2s, background .2s;
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  box-shadow: 0 8px 24px rgba(110, 168, 255, 0.35);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(110, 168, 255, 0.5); }
.btn--ghost {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface);
}
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }

.hero__stats {
  margin-top: 56px;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 540px; margin-left: auto; margin-right: auto;
}
.stat {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 18px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .2s, border-color .2s;
}
.stat:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.stat__num { font-size: 26px; font-weight: 700; color: var(--text); font-family: var(--mono); }
.stat__label { font-size: 12px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }

/* =========================
   Sections
   ========================= */
.section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 60px 24px;
}
.section__head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 32px;
}
.section__index { font-family: var(--mono); font-size: 16px; color: var(--accent); }
.section__title {
  font-size: clamp(24px, 3.6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section__line { flex: 1; height: 1px; background: var(--border); }

/* =========================
   About
   ========================= */
.about {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
}
.about__text p { color: var(--text-dim); margin-bottom: 16px; }
.about__text strong { color: var(--text); }
.about__text em { color: var(--accent-3); font-style: normal; }
.about__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-dim);
}
.about__list li { padding-left: 0; }
.about__card {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.about__row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px;
  background: var(--surface);
  font-size: 14px;
  gap: 12px;
}
.about__row span { color: var(--text-mute); }
.about__row b { color: var(--text); text-align: right; font-weight: 500; }

/* =========================
   Skills
   ========================= */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.skills__group {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .2s, border-color .2s;
}
.skills__group:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.skills__group h3 {
  font-size: 14px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  font-family: var(--mono);
}
.skills__group ul { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  padding: 5px 12px;
  font-size: 13px;
  font-family: var(--mono);
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: transform .2s, border-color .2s;
}
.chip:hover { transform: translateY(-2px); border-color: var(--c, var(--accent)); }
.chip--soft { color: var(--text-dim); background: transparent; border-style: dashed; }

/* =========================
   Projects
   ========================= */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 20px;
}
.project {
  position: relative;
  display: flex; flex-direction: column;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .25s var(--ease), border-color .2s, background .2s;
}
.project:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--surface-2);
}
.project::before {
  content: ""; position: absolute; inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--accent) 50%, transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0; transition: opacity .3s;
  pointer-events: none;
}
.project:hover::before { opacity: 0.6; }
.project__head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 8px; }
.project h3 { font-size: 18px; font-weight: 600; }
.project__tag {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent-3);
  padding: 4px 8px;
  border: 1px solid color-mix(in srgb, var(--accent-3) 40%, transparent);
  border-radius: 6px;
  white-space: nowrap;
}
.project p { color: var(--text-dim); font-size: 14px; margin-bottom: 14px; flex: 1; }
.project__stack { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.project__stack li {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-mute);
  padding: 3px 8px;
  background: var(--surface-2);
  border-radius: 4px;
}
.project__bullets {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex; flex-direction: column; gap: 6px;
}
.project__bullets li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-dim);
}
.project__bullets li::before {
  content: "";
  position: absolute;
  left: 4px; top: 9px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px color-mix(in srgb, var(--accent) 60%, transparent);
}
.project__links { display: flex; gap: 16px; }
.link {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  transition: color .2s;
}
.link:hover { color: var(--text); }

/* =========================
   Contact
   ========================= */
.contact__lead {
  max-width: 620px;
  color: var(--text-dim);
  font-size: 17px;
  margin-bottom: 32px;
}
.contact__lead strong { color: var(--text); }
.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.contact__card {
  display: flex; flex-direction: column; gap: 4px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .2s, border-color .2s, color .2s;
}
.contact__card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  color: var(--accent);
}
.contact__label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.contact__value { font-size: 15px; color: var(--text); }
.contact__card:hover .contact__value { color: var(--accent); }

/* =========================
   Section lead (intro paragraph)
   ========================= */
.section__lead {
  max-width: 720px;
  color: var(--text-dim);
  font-size: 16px;
  margin: -16px 0 28px;
}

/* =========================
   Side projects (compact grid)
   ========================= */
.side-projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}
.side {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .25s var(--ease), border-color .2s, background .2s;
}
.side:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  background: var(--surface-2);
}
.side__icon {
  flex-shrink: 0;
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 24%, transparent);
}
.side__icon svg { width: 20px; height: 20px; }
.side__body { flex: 1; min-width: 0; }
.side__head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.side h3 { font-size: 15px; font-weight: 600; font-family: var(--mono); }
.side__tag {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-mute);
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.side p { color: var(--text-dim); font-size: 13px; line-height: 1.5; margin-bottom: 8px; }
.side p code {
  font-size: 11px;
  padding: 1px 5px;
  background: var(--surface-2);
  border-radius: 3px;
  color: var(--accent-3);
}
.side .link { font-size: 12px; }

/* =========================
   Footer
   ========================= */
.footer {
  max-width: 1000px;
  margin: 0 auto;
  padding: 30px 24px 60px;
  text-align: center;
  color: var(--text-mute);
  font-size: 14px;
  border-top: 1px solid var(--border);
}
.footer__small { margin-top: 6px; font-family: var(--mono); font-size: 12px; color: var(--text-mute); opacity: 0.7; }

/* =========================
   Reveal on scroll
   ========================= */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* =========================
   Responsive
   ========================= */
@media (max-width: 760px) {
  .nav__links { display: none; }
  .about { grid-template-columns: 1fr; }
  .about__list { grid-template-columns: 1fr; }
  .hero { padding-top: 48px; }
  .hero__stats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .stat { padding: 12px 6px; }
  .stat__num { font-size: 20px; }
  .section { padding: 40px 20px; }
}

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