/* Base styles */
:root {
  --bg: #0f0f12;
  --elev: #16161b;
  --text: #e8e8ef;
  --muted: #b5b5c6;
  --primary: #6ea8fe;
  --primary-600: #4d8ef9;
  --accent: #d140e3;
  --border: #2a2a33;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg), #0b0b0e 60%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-600); text-decoration: underline; }

.container { width: min(1100px, 92%); margin: 0 auto; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 18, 0.75);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: var(--accent); color: #111; font-weight: 800; }
.brand-text { letter-spacing: 0.2px; }

.nav { display: flex; gap: 18px; }
.nav a { color: var(--muted); font-weight: 600; }
.nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero {
  padding: 64px 0 40px;
  background: radial-gradient(1200px 600px at 10% -10%, rgba(110, 168, 254, 0.18), transparent 40%),
              radial-gradient(1200px 600px at 90% -30%, rgba(255, 209, 102, 0.12), transparent 35%);
  border-bottom: 1px solid var(--border);
}
.hero h1 { font-size: clamp(28px, 4vw, 44px); margin: 0 0 10px; }
.lead { font-size: clamp(16px, 2.3vw, 18px); color: var(--muted); max-width: 65ch; }

.cta-group { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }

.btn { display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px; border-radius: 10px; border: 1px solid var(--border); font-weight: 700; letter-spacing: 0.2px; transition: 0.2s ease; }
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: var(--primary); color: #0b0b0e; border-color: transparent; }
.btn-primary:hover { background: var(--primary-600); }
.btn-secondary { background: var(--elev); color: var(--text); }
.btn-outline { background: transparent; color: var(--text); }

/* Sections */
.section { padding: 38px 0 54px; }
.grid-two { display: grid; grid-template-columns: 1fr; gap: 28px; }
@media (min-width: 860px) { .grid-two { grid-template-columns: 1fr 1fr; gap: 40px; } }

.actions { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.link { font-weight: 600; }

/* PDF viewer page */
.page-title { margin: 16px 0 8px; font-size: clamp(22px, 3vw, 32px); }
.page-sub { color: var(--muted); margin: 0 0 16px; }
.viewer-bar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 14px 0 16px; }
.viewer { background: var(--elev); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.viewer iframe, .viewer embed, .viewer object { width: 100%; height: 80vh; border: 0; display: block; }
.fallback { padding: 16px; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: rgba(15,15,18,0.7); }
.footer-inner { padding: 20px 0; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.small { color: var(--muted); font-size: 12px; }

/* Dark mode respects the same palette; adjust link contrast if needed */
@media (prefers-color-scheme: light) {
  :root { --bg: #f7f7fb; --elev: #ffffff; --text: #17171a; --muted: #5b5b6e; --border: #e2e2ea; --primary: #2b6efd; --primary-600: #1d5ae8; --accent: #c000f5; }
  body { background: linear-gradient(180deg, #f8f9fb, #ffffff 60%); }
  .site-header { background: rgba(255,255,255,0.8); }
}

/* Enhancements for personal portfolio layout */

/* Hero grid and portrait */
.hero-grid { display: grid; grid-template-columns: 1fr; align-items: center; gap: 22px; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.2fr 0.8fr; gap: 40px; } }
.pill { display: inline-block; padding: 6px 10px; border-radius: 999px; background: var(--elev); border: 1px solid var(--border); color: var(--muted); font-weight: 700; font-size: 12px; letter-spacing: 0.2px; margin-bottom: 6px; }
.hero-media { display: flex; justify-content: center; }
.portrait-wrap { position: relative; max-width: 380px; width: 100%; padding: 8px; border-radius: 20px; background: linear-gradient(135deg, rgba(110,168,254,0.35), rgba(255,209,102,0.25)); }
.portrait { width: 100%; height: auto; display: block; border-radius: 16px; box-shadow: 0 12px 34px rgba(0,0,0,0.45); object-fit: cover; }

/* Cards */
.cards { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 720px) { .cards { grid-template-columns: 1fr 1fr; gap: 20px; } }
.card { display: block; background: var(--elev); border: 1px solid var(--border); border-radius: 14px; padding: 18px; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.card:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: 0 8px 24px rgba(0,0,0,0.25); text-decoration: none; }
.card-badge { display: inline-block; padding: 4px 10px; border-radius: 999px; font-weight: 700; background: rgba(110,168,254,0.15); color: var(--primary); border: 1px solid rgba(110,168,254,0.35); font-size: 12px; }
.card h3 { margin: 10px 0 6px; }
.card p { color: var(--muted); margin: 0 0 8px; }
.card-cta { color: var(--text); font-weight: 700; }

/* Chips and lists */
.chips, .list-plain, .timeline { list-style: none; margin: 8px 0 0; padding: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips li { background: var(--elev); color: var(--text); border: 1px solid var(--border); border-radius: 999px; padding: 6px 10px; font-weight: 600; font-size: 14px; }
.list-plain li { margin: 4px 0; }

/* Timeline */
.timeline { border-left: 2px solid var(--border); padding-left: 16px; }
.timeline li { position: relative; margin: 20px 0; padding-left: 8px; }
.timeline li::before { content: ""; position: absolute; left: -10px; top: 6px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px rgba(255,209,102,0.15); }

/* Callout */
.callout { background: radial-gradient(800px 300px at 10% 0%, rgba(110,168,254,0.15), transparent 40%), radial-gradient(800px 300px at 90% 20%, rgba(255,209,102,0.15), transparent 45%); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.callout-inner { display: grid; grid-template-columns: 1fr; align-items: center; gap: 12px; }
@media (min-width: 860px) { .callout-inner { grid-template-columns: 1.3fr auto; gap: 20px; } }
.callout-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Anchor offset so sticky header doesn't cover targets */
[id] { scroll-margin-top: 80px; }

@media (prefers-color-scheme: light) {
  .portrait-wrap { background: linear-gradient(135deg, rgba(43,110,253,0.18), rgba(245,159,0,0.18)); }
  .card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
}