:root {
  --bg: #0b0f19;
  --bg-elev: #121829;
  --text: #e6e8ee;
  --muted: #a7b0c0;
  --accent: #6aa1ff;
  --primary: #7aa2ff;
  --card: #0f1424;
  --border: #1a2238;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.light {
  --bg: #f7f8fb;
  --bg-elev: #ffffff;
  --text: #0b0f19;
  --muted: #4b5565;
  --accent: #2b6cff;
  --primary: #2b6cff;
  --card: #ffffff;
  --border: #e5e7ef;
  --shadow: 0 10px 25px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Noto Sans, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol, Noto Color Emoji, "Inter";
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

.site-header { position: sticky; top: 0; z-index: 10; background: rgba(11,15,25,0.65); backdrop-filter: saturate(180%) blur(10px); border-bottom: 1px solid var(--border); }
.site-header .nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.logo { font-weight: 800; letter-spacing: 0.4px; color: var(--text); text-decoration: none; }
.site-header nav { display: flex; align-items: center; gap: 18px; }
.site-header nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.site-header nav a:hover { color: var(--text); }
#themeToggle { background: transparent; border: 1px solid var(--border); color: var(--muted); padding: 8px 10px; border-radius: 10px; cursor: pointer; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--border); color: var(--text); text-decoration: none; background: var(--bg-elev); box-shadow: var(--shadow); }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--accent)); color: white !important; border: none; }

.hero { display: grid; grid-template-columns: 1.2fr 0.8fr; align-items: center; gap: 36px; padding: 64px 0; }
.hero .hero-content h1 { font-size: 42px; margin: 0 0 10px; }
.subtitle { color: var(--muted); max-width: 640px; }
.accent { color: var(--accent); }
.actions { display: flex; gap: 12px; margin: 18px 0 8px; }
.socials { display: flex; gap: 12px; margin-top: 10px; }

.hero-art { position: relative; height: 280px; border-radius: 20px; background: radial-gradient(60% 80% at 50% 50%, #1a2442 0%, rgba(26,36,66,0) 70%); border: 1px solid var(--border); overflow: hidden; }
.hero-art .glow { position: absolute; width: 220px; height: 220px; background: radial-gradient(circle, rgba(122,162,255,0.35), rgba(122,162,255,0)); border-radius: 50%; top: 20%; left: 20%; filter: blur(10px); animation: float 6s ease-in-out infinite; }
@keyframes float { 0%,100%{ transform: translate(0,0);} 50%{ transform: translate(10px, -10px);} }

.section { padding: 56px 0; }
.section[id] { scroll-margin-top: 80px; }
.section h2 { margin: 0 0 18px; font-size: 28px; }
.highlights { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; padding-left: 18px; }

.skills-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; }
.skill { border: 1px solid var(--border); background: var(--card); border-radius: 14px; padding: 14px; display: flex; align-items: center; justify-content: space-between; }
.skill .name { font-weight: 600; }
.skill .level { color: var(--muted); font-size: 13px; }

.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.filters { display: flex; flex-wrap: wrap; gap: 10px; }
.filter { padding: 8px 12px; border: 1px solid var(--border); border-radius: 20px; cursor: pointer; color: var(--muted); background: var(--bg-elev); }
.filter.active { background: var(--accent); color: white; border-color: transparent; }

.projects-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.project { border: 1px solid var(--border); background: var(--card); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; }
.project .thumb { height: 160px; background-size: cover; background-position: center; border-bottom: 1px solid var(--border); }
.project .content { padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.stack { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font-size: 12px; padding: 6px 10px; border-radius: 999px; background: var(--bg-elev); border: 1px solid var(--border); color: var(--muted); }
.project .links { display: flex; gap: 10px; margin-top: 4px; }

.timeline { display: grid; gap: 14px; }
.exp { border: 1px solid var(--border); background: var(--card); border-radius: 14px; padding: 14px; }
.exp .role { font-weight: 700; }
.exp .meta { color: var(--muted); font-size: 13px; }
.exp ul { margin: 10px 0 0 18px; }

.site-footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .skills-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
}
@media (max-width: 640px) {
  .skills-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .projects-grid { grid-template-columns: 1fr; }
  .highlights { grid-template-columns: 1fr; }
}