:root {
  --bg: #050914;
  --bg-soft: #0c1528;
  --card: rgba(20, 31, 54, 0.72);
  --text: #e8eef7;
  --muted: #a8b5cc;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --accent-3: #22d3ee;
  --border: #22345a;
  --radius: 16px;
  --mono: "Cascadia Code", "JetBrains Mono", Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); }

/* ---- preloader ---- */
#preloader {
  position: fixed; inset: 0; z-index: 100;
  background: var(--bg); display: flex; align-items: center; justify-content: center;
  transition: opacity 0.5s, visibility 0.5s;
}
#preloader.done { opacity: 0; visibility: hidden; }
.pre-box { font-family: var(--mono); color: var(--accent); font-size: 0.95rem; }
.pre-box p { margin: 0.3rem 0; }
.pre-box .ok { color: #22c55e; }

/* ---- animated background layers ---- */
#bg-canvas { position: fixed; inset: 0; z-index: 0; opacity: 0.55; }
.orb { position: fixed; border-radius: 50%; filter: blur(90px); z-index: 0; pointer-events: none; opacity: 0.5; }
.orb-1 { width: 480px; height: 480px; background: #0ea5e9; top: -140px; right: -120px; animation: drift 14s ease-in-out infinite alternate; }
.orb-2 { width: 420px; height: 420px; background: #6366f1; bottom: -140px; left: -120px; animation: drift 18s ease-in-out infinite alternate-reverse; }
.orb-3 { width: 300px; height: 300px; background: #06b6d4; top: 40%; left: 55%; opacity: 0.25; animation: drift 22s ease-in-out infinite alternate; }
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-60px, 60px) scale(1.15); }
}

#cursor-glow {
  position: fixed; width: 320px; height: 320px; border-radius: 50%;
  background: radial-gradient(circle, rgba(56,189,248,0.16), transparent 65%);
  pointer-events: none; z-index: 1; transform: translate(-50%, -50%);
}

#progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  z-index: 50; box-shadow: 0 0 12px var(--accent);
}

/* ---- header ---- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(5, 9, 20, 0.75);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav {
  max-width: 1120px; margin: 0 auto; padding: 0.8rem 1.25rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  position: relative; z-index: 2;
}
.brand { display: inline-flex; align-items: center; height: 40px; min-width: 52px; font-size: 1.5rem; font-weight: 800; color: var(--text); position: relative; }
.brand:hover { text-decoration: none; }
.brand-avatar {
  position: absolute; left: 0; top: 50%; width: 36px; height: 36px; border-radius: 50%;
  object-fit: cover; border: 2px solid var(--accent); box-shadow: 0 0 14px rgba(56,189,248,0.6);
  opacity: 0; transform: translateY(-50%) scale(0.5); transition: opacity 0.3s, transform 0.3s; pointer-events: none;
}
.brand.avatar-mode .brand-avatar { opacity: 1; transform: translateY(-50%) scale(1); }
.nav-links { display: flex; align-items: center; gap: 1.1rem; }
.nav-links a { color: var(--muted); position: relative; transition: color 0.25s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); text-decoration: none; }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 2px;
}
.nav-toggle { display: none; }

main { max-width: 1120px; margin: 0 auto; padding: 0 1.25rem 3rem; position: relative; z-index: 2; }

/* ---- hero ---- */
.hero {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 2rem; align-items: center; padding: 4rem 0 2.5rem;
}
.eyebrow {
  color: var(--accent); margin: 0 0 0.4rem; letter-spacing: 0.12em;
  text-transform: uppercase; font-size: 0.85rem; display: flex; align-items: center; gap: 0.5rem;
}
.pulse-dot { width: 10px; height: 10px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 0 rgba(34,197,85,0.7); animation: pulse 2s infinite; display: inline-block; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34,197,85,0.7); }
  70% { box-shadow: 0 0 0 10px rgba(34,197,85,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,197,85,0); }
}
.hero h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); margin: 0; line-height: 1.05; }
.gradient-text {
  background: linear-gradient(90deg, #fff, var(--accent) 40%, var(--accent-2) 70%, var(--accent-3));
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shine 6s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }
.role { font-size: 1.3rem; color: var(--accent-2); margin: 0.4rem 0 0.75rem; font-weight: 600; min-height: 2rem; }
.caret { animation: blink 1s steps(1) infinite; color: var(--accent); }
@keyframes blink { 50% { opacity: 0; } }
.tagline { color: var(--muted); max-width: 34rem; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.25rem 0; }
.btn {
  display: inline-block; background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #06121f; font-weight: 700; padding: 0.7rem 1.35rem; border-radius: 999px;
  border: 1px solid transparent; transition: transform 0.2s, box-shadow 0.25s, filter 0.2s;
  box-shadow: 0 4px 24px rgba(56,189,248,0.35);
}
.btn:hover { text-decoration: none; filter: brightness(1.1); box-shadow: 0 6px 32px rgba(56,189,248,0.55); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,0.04); color: var(--text); border-color: var(--border); box-shadow: none; }
.btn-small { padding: 0.45rem 0.95rem; }
.nav-links a.btn { color: #06121f; }
.nav-links a.btn:hover { color: #06121f; text-decoration: none; }

.hero-stats { display: flex; gap: 1.75rem; margin: 1rem 0 1.25rem; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 1.7rem; font-weight: 800; color: #fff; }
.stat-label { font-size: 0.82rem; color: var(--muted); }

.socials { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.95rem; }
.socials a { padding: 0.2rem 0.1rem; border-bottom: 1px dashed transparent; transition: border-color 0.2s; }
.socials a:hover { border-color: var(--accent); text-decoration: none; }

.hero-visual { min-width: 0; }

/* ---- code window ---- */
.code-window, .term-window {
  background: rgba(8, 13, 26, 0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45), 0 0 40px rgba(56,189,248,0.08);
}
.code-bar {
  display: flex; align-items: center; gap: 0.45rem; flex-wrap: wrap;
  padding: 0.6rem 0.9rem; background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.dot.r { background: #f87171; } .dot.y { background: #fbbf24; } .dot.g { background: #34d399; }
.code-tabs { display: flex; gap: 0.4rem; margin-left: 0.6rem; flex-wrap: wrap; }
.code-tab {
  background: transparent; border: 1px solid transparent; color: var(--muted);
  font-family: var(--mono); font-size: 0.75rem; padding: 0.25rem 0.6rem; border-radius: 8px; cursor: pointer;
}
.code-tab.active { color: var(--accent); border-color: var(--border); background: rgba(56,189,248,0.08); }
.code-body {
  margin: 0; padding: 1rem 1.1rem; min-height: 240px;
  font-family: var(--mono); font-size: 0.82rem; line-height: 1.7; color: #c9e4ff;
  white-space: pre-wrap; overflow-wrap: anywhere; overflow-x: auto;
}
.code-note { margin: 0; padding: 0 1.1rem 0.9rem; font-size: 0.78rem; color: var(--muted); }

/* ---- marquee ---- */
.marquee { overflow: hidden; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin: 1rem 0 0; opacity: 0.85; }
.marquee-track { display: inline-flex; white-space: nowrap; padding: 0.6rem 0; color: var(--muted); font-size: 0.9rem; animation: marquee 28s linear infinite; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---- sections ---- */
.section { padding: 2.5rem 0 0.5rem; scroll-margin-top: 80px; }
.section h2 { font-size: 1.8rem; margin-bottom: 0.5rem; }
.section h2::after {
  content: ""; display: block; width: 64px; height: 3px; margin-top: 0.4rem; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.section-sub { color: var(--muted); margin-top: 0; max-width: 46rem; }

[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-reveal].revealed { opacity: 1; transform: none; }

/* about */
.about-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 2.5rem; align-items: center; }
.hero-photo { position: relative; justify-self: center; }
.photo-glow {
  position: absolute; inset: 8% 4%; z-index: 0;
  background: radial-gradient(circle, rgba(56,189,248,0.35), rgba(129,140,248,0.12) 55%, transparent 70%);
  filter: blur(30px);
  animation: breathe 5s ease-in-out infinite;
}
@keyframes breathe { 50% { opacity: 0.6; transform: scale(1.07); } }
.hero-photo img {
  position: relative; z-index: 1; width: 100%; max-width: 320px; aspect-ratio: 1/1; object-fit: cover;
  border-radius: 24px; border: 1px solid var(--border); display: block; background: var(--bg-soft);
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.photo-badge {
  position: absolute; z-index: 2; bottom: -14px; left: 50%; transform: translateX(-50%);
  white-space: nowrap; font-size: 0.78rem; font-weight: 700;
  background: rgba(5,9,20,0.85); border: 1px solid var(--border); border-radius: 999px;
  padding: 0.3rem 0.9rem; color: var(--accent); backdrop-filter: blur(6px);
}
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin-top: 1.25rem; }
.principle {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 0.8rem 0.9rem;
  display: flex; flex-direction: column; gap: 0.2rem; transition: transform 0.25s, border-color 0.25s;
}
.principle:hover { transform: translateY(-3px); border-color: var(--accent); }
.principle strong { color: #fff; font-size: 0.92rem; }
.principle span { color: var(--muted); font-size: 0.82rem; }

/* skills */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1rem; }
.skill-card, .project-card, .lab-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.15rem 1.25rem;
  backdrop-filter: blur(10px); transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.skill-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 12px 40px rgba(56,189,248,0.18); }
.skill-card h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.skill-card p { margin: 0 0 0.7rem; color: var(--muted); font-size: 0.93rem; }
.bar { height: 8px; border-radius: 99px; background: rgba(255,255,255,0.08); overflow: hidden; }
.bar span {
  display: block; height: 100%; width: 0; border-radius: 99px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  transition: width 1.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 0 10px var(--accent);
}

/* projects */
.filters { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: 1rem 0 0.25rem; }
.filter-btn, .chip-btn {
  background: rgba(255,255,255,0.04); color: var(--text); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.45rem 1.05rem; font-size: 0.86rem; font-weight: 600; cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
}
.filter-btn:hover, .chip-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.filter-btn.active { background: linear-gradient(90deg, var(--accent), var(--accent-2)); color: #06121f; border-color: transparent; }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 1rem; }
.project-card { position: relative; overflow: hidden; transform-style: preserve-3d; will-change: transform; }
.project-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity 0.3s; pointer-events: none;
  background: radial-gradient(500px circle at var(--mx, 50%) var(--my, 50%), rgba(56,189,248,0.15), transparent 45%);
}
.project-card:hover::before { opacity: 1; }
.project-card:hover { border-color: var(--accent); box-shadow: 0 16px 50px rgba(56,189,248,0.2); }
.project-card.featured { border-color: var(--accent); background: linear-gradient(160deg, rgba(56,189,248,0.14), rgba(20,31,54,0.85)); }
.project-card.hidden { display: none; }
.project-card h3 { margin: 0.35rem 0 0.5rem; }
.project-card p { color: var(--muted); margin: 0 0 0.75rem; font-size: 0.95rem; }
.project-card .project-flag {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase;
  color: #06121f;
  background: linear-gradient(90deg, var(--accent), var(--accent-3));
  border-radius: 999px; padding: 0.28rem 0.8rem; margin: 0 0 0.35rem;
}
.project-card .project-flag::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; background: #06121f; flex-shrink: 0;
}
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem; padding: 0; margin: 0 0 0.8rem; }
.tags li {
  font-size: 0.78rem; color: var(--text); background: rgba(255,255,255,0.05);
  border: 1px solid var(--border); border-radius: 999px; padding: 0.16rem 0.65rem;
}
.project-card:hover .tags li { border-color: var(--accent); }
.project-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.gh-meta { display: flex; gap: 1rem; color: var(--muted); font-size: 0.82rem; margin: 0 0 0.7rem; font-family: var(--mono); }
.live-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #475569; vertical-align: middle; }
.live-dot.on { background: #22c55e; box-shadow: 0 0 8px #22c55e; animation: pulse 2s infinite; }
#repos-sync-note { color: var(--accent); font-size: 0.75rem; }
.verified-note { color: var(--muted); font-size: 0.72rem; border-bottom: 1px dotted var(--muted); cursor: help; }
.devpost-card {
  margin-top: 1rem; display: flex; align-items: center; justify-content: space-between; gap: 1.25rem; flex-wrap: wrap;
  background: linear-gradient(160deg, rgba(129,140,248,0.14), rgba(20,31,54,0.85));
  border: 1px solid var(--accent-2); border-radius: var(--radius); padding: 1.15rem 1.25rem;
}
.devpost-card h3 { margin: 0 0 0.35rem; }
.devpost-card p { margin: 0; color: var(--muted); font-size: 0.93rem; max-width: 44rem; }
.devpost-card p strong { color: #fff; }

/* playground labs */
.labs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1rem; }
.lab-card h3 { margin: 0 0 0.2rem; }
.lab-sub { color: var(--muted); font-size: 0.88rem; margin: 0 0 0.9rem; }
.lab-controls { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-top: 0.8rem; }
.lab-controls.column { flex-direction: column; align-items: stretch; }
.lab-status { color: var(--muted); font-size: 0.82rem; margin: 0.7rem 0 0; font-family: var(--mono); }
.slider-label { display: flex; align-items: center; gap: 0.6rem; font-size: 0.85rem; color: var(--muted); }
.slider-label input[type="range"] { flex: 1; accent-color: var(--accent); }
.check-label { display: flex; align-items: center; gap: 0.45rem; font-size: 0.86rem; color: var(--muted); }
.check-label input { accent-color: var(--accent); }
.sort-bars { display: flex; align-items: flex-end; gap: 3px; height: 150px; padding: 0.6rem; background: rgba(0,0,0,0.3); border: 1px solid var(--border); border-radius: 10px; }
.sort-bars i { flex: 1; background: linear-gradient(180deg, var(--accent), var(--accent-2)); border-radius: 3px 3px 0 0; min-height: 4px; transition: height 0.12s; }
.sort-bars i.cmp { background: linear-gradient(180deg, #fbbf24, #f97316); }
.sort-bars i.done { background: linear-gradient(180deg, #34d399, #22d3ee); }
.pulse-readout { display: grid; gap: 0.5rem; }
.pulse-readout > div { display: flex; align-items: center; gap: 0.7rem; background: rgba(0,0,0,0.3); border: 1px solid var(--border); border-radius: 10px; padding: 0.5rem 0.8rem; }
.pulse-readout span { font-size: 0.72rem; letter-spacing: 0.1em; color: var(--accent); font-weight: 800; width: 44px; }
.pulse-readout code { color: #c9e4ff; font-size: 0.85rem; word-break: break-all; }

/* terminal */
.term-title { margin-left: 0.5rem; font-family: var(--mono); font-size: 0.8rem; color: var(--muted); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.term-output { padding: 1rem 1.1rem 0; font-family: var(--mono); font-size: 0.85rem; min-height: 220px; max-height: 340px; overflow-y: auto; }
.term-output p { margin: 0.25rem 0; color: #c9e4ff; }
.term-output .t-dim { color: var(--muted); }
.term-output .t-accent { color: var(--accent); }
.term-form { display: flex; align-items: center; gap: 0.6rem; padding: 0.8rem 1.1rem 1rem; }
.term-prompt { color: #34d399; font-family: var(--mono); font-weight: 700; }
.term-blink { animation: blink 1.1s steps(1) infinite; display: inline-block; }
.term-form:focus-within .term-blink,
.term-form.term-active .term-blink { animation: none !important; opacity: 1; }
#term-input {
  flex: 1; background: transparent; border: none; outline: none; color: #fff;
  font-family: var(--mono); font-size: 0.9rem;
}

.contact { text-align: left; }
.contact .btn { font-size: 1rem; }
button.btn { font: inherit; cursor: pointer; }
.contact-alt { color: var(--muted); font-size: 0.85rem; margin: 0.4rem 0 0; }

.site-footer { border-top: 1px solid var(--border); text-align: center; color: var(--muted); padding: 1.5rem 1rem 2rem; font-size: 0.9rem; position: relative; z-index: 2; }

@media (max-width: 980px) {
  .labs-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .skills-grid, .projects-grid { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  #cursor-glow { display: none; }
  .nav-toggle {
    display: inline-block; background: transparent; color: var(--text);
    border: 1px solid var(--border); border-radius: 8px; padding: 0.4rem 0.8rem;
  }
  .nav-links { display: none; width: 100%; flex-direction: column; align-items: flex-start; }
  .nav { flex-wrap: wrap; }
  .nav-links.open { display: flex; }
}

@media (max-width: 520px) {
  .code-body { font-size: 0.74rem; min-height: 200px; }
  .term-output { font-size: 0.78rem; }
  .code-tab { font-size: 0.68rem; padding: 0.22rem 0.5rem; }
  .hero-stats { gap: 1.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  [data-reveal] { opacity: 1; transform: none; }
}