/* ===========================================================
   portfolio — personal card. Pure static, no dependencies.
   Theme is switched via [data-theme] on <html>.
   =========================================================== */

:root {
  --accent: #6ea8fe;
  --accent-2: #8a7bff;
  --radius: 16px;
  --maxw: 760px;
  --transition: 0.25s ease;
}

/* ---- Dark theme (default) ---- */
html[data-theme="dark"] {
  --bg: #0b0d12;
  --bg-soft: #11151c;
  --panel: #151922;
  --panel-2: #1b2029;
  --border: #262d39;
  --border-strong: #323a48;
  --text: #e7ebf3;
  --muted: #95a0b3;
  --chip-bg: #1b2029;
  --glow: rgba(110, 168, 254, 0.18);
  --grid-line: rgba(255, 255, 255, 0.035);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
}

/* ---- Light theme ---- */
html[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-soft: #eef1f7;
  --panel: #ffffff;
  --panel-2: #f3f5fa;
  --border: #e3e8f0;
  --border-strong: #cfd6e2;
  --text: #1a2231;
  --muted: #5c6678;
  --chip-bg: #eef2f9;
  --glow: rgba(110, 168, 254, 0.22);
  --grid-line: rgba(20, 30, 60, 0.04);
  --shadow: 0 18px 50px rgba(40, 60, 110, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
  position: relative;
  min-height: 100vh;
}

/* ---- Background decoration ---- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  z-index: -1;
  background: radial-gradient(circle at 30% 30%, var(--glow), transparent 60%),
    radial-gradient(circle at 70% 40%, rgba(138, 123, 255, 0.16), transparent 60%);
  filter: blur(20px);
  pointer-events: none;
}

/* ---- Nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 20px;
  backdrop-filter: blur(8px);
}
.logo {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.3px;
  text-decoration: none;
  color: var(--text);
}
.nav-actions { display: flex; align-items: center; gap: 10px; }

.pill {
  position: relative;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  gap: 6px;
  transition: border-color var(--transition), background var(--transition);
}
.pill:hover { border-color: var(--accent); }
.pill .pill-on { color: var(--accent); }
.pill .pill-off { color: var(--muted); }

.icon-btn {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.icon-btn .i-sun { display: none; }
.icon-btn .i-moon { display: block; }
html[data-theme="light"] .icon-btn .i-sun { display: block; }
html[data-theme="light"] .icon-btn .i-moon { display: none; }

/* ---- Layout ---- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 20px 40px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* ---- Hero ---- */
.hero { text-align: center; padding: 40px 0 12px; }
.avatar {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-strong);
  box-shadow: var(--shadow);
}
.avatar-fallback {
  display: grid;
  place-items: center;
  font-size: 52px;
  font-weight: 800;
  color: #071018;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
}
.name {
  margin: 18px 0 4px;
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.role { margin: 0; font-size: 17px; font-weight: 600; }
.tagline { margin: 6px auto 0; max-width: 480px; color: var(--muted); }

.cta { display: flex; gap: 12px; justify-content: center; margin-top: 26px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.05s, filter var(--transition), background var(--transition), border-color var(--transition);
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #071018;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---- Cards ---- */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 14px; font-size: 18px; font-weight: 700; }
.lead { margin: 0; color: var(--muted); }

/* ---- Chips ---- */
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 9px; }
.chips li {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  transition: border-color var(--transition), color var(--transition), transform 0.1s;
}
.chips li:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ---- Projects ---- */
.projects { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.project {
  display: block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), transform 0.1s, box-shadow var(--transition);
}
.project:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow); }
.project h3 { margin: 0 0 6px; font-size: 15px; }
.project p { margin: 0 0 12px; font-size: 13px; color: var(--muted); }
.project-link { font-size: 13px; font-weight: 600; color: var(--accent); }
.project-link::after { content: " →"; }

/* ---- Footer ---- */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--accent); }

/* ---- Reveal on scroll ---- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---- Mobile ---- */
@media (max-width: 560px) {
  .projects { grid-template-columns: 1fr; }
  .card { padding: 20px; }
}
