/* ===== Base ===== */
:root {
  --bg: #0b0d10;
  --surface: #101419;
  --text: #e6e9ef;
  --muted: #9aa3af;
  --accent: #6EE7B7; /* mint */
  --accent-2: #38BDF8; /* sky */
  --card: #121821;
  --border: #1f2630;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7fafc;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #475569;
    --card: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 10px 25px rgba(2,8,23,.08);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 800px at 80% -20%, rgba(56,189,248,.15), transparent 50%),
              radial-gradient(1000px 900px at -10% 10%, rgba(110,231,183,.14), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.container { width: min(1100px, 92%); margin: 0 auto; }
.section { padding: 4rem 0; }
.section-head { margin-bottom: 1.25rem; }
.section-head h2 { font-size: 1.875rem; margin: 0 0 .25rem; letter-spacing: .3px; }
.section-sub { color: var(--muted); margin: 0; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(10px);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: .9rem 0; }
.brand { font-weight: 800; text-decoration: none; color: var(--text); letter-spacing: .5px; }
.nav-links a { color: var(--muted); text-decoration: none; margin-left: 1rem; font-weight: 600; }
.nav-links a:hover { color: var(--text); }

/* ===== Hero ===== */
.hero { display: grid; grid-template-columns: 1.2fr .8fr; gap: 2rem; padding: 3.5rem 0 2.5rem; align-items: center; }
.hero h1 { font-size: clamp(2rem, 3vw + 1rem, 3rem); margin: 0 0 .25rem; }
.tagline { font-weight: 600; color: var(--text); opacity: .9; margin: 0 0 .5rem; }
.sub { color: var(--muted); margin: 0 0 1rem; }
.accent { background: linear-gradient(90deg, var(--accent), var(--accent-2));
          -webkit-background-clip: text; background-clip: text; color: transparent; }
.actions { display: flex; gap: .75rem; flex-wrap: wrap; }
.hero-card { background: var(--card); border: 1px solid var(--border); border-radius: 1rem; padding: 1rem 1.25rem; box-shadow: var(--shadow); }
.quick-specs { list-style: none; padding: 0; margin: 0; color: var(--muted); }
.quick-specs li { padding: .35rem 0; }
.quick-specs strong { color: var(--text); }

/* ===== Buttons ===== */
.btn { display: inline-block; padding: .65rem .95rem; border-radius: .75rem; border: 1px solid var(--border); text-decoration: none; color: var(--text); font-weight: 700; transition: transform .08s ease, background .2s ease, border-color .2s ease; }
.btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.btn.primary { background: linear-gradient(90deg, var(--accent), var(--accent-2)); color: #0b0d10; border-color: transparent; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.ghost { background: transparent; opacity: .9; }
.btn.small { padding: .5rem .7rem; font-size: .9rem; }

/* ===== Grid / Cards ===== */
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; margin-top: 1rem; }
.card { grid-column: span 12; background: var(--card); border: 1px solid var(--border); border-radius: 1rem; overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.card-body { padding: 1rem 1.1rem .5rem; }
.card h3 { margin: 0 0 .3rem; font-size: 1.15rem; }
.card p { margin: 0 0 .6rem; color: var(--muted); }
.meta { list-style: none; padding: 0; margin: 0; display: flex; gap: .6rem; flex-wrap: wrap; color: var(--muted); font-size: .95rem; }
.card-actions { display: flex; gap: .6rem; padding: 0 1.1rem 1rem; margin-top: auto; }

@media (min-width: 640px) { .card { grid-column: span 6; } }
@media (min-width: 980px) { .card { grid-column: span 3; } }

/* ===== Skills ===== */
.skills { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; margin-top: .75rem; }
.skill-col { grid-column: span 12; background: var(--surface); border: 1px dashed var(--border); border-radius: .9rem; padding: .9rem 1rem; }
.skill-col h3 { margin: 0 0 .4rem; font-size: 1.05rem; }
.skill-col ul { margin: 0; padding-left: 1rem; color: var(--muted); }
@media (min-width: 700px) { .skill-col { grid-column: span 6; } }
@media (min-width: 980px) { .skill-col { grid-column: span 3; } }

/* ===== About ===== */
.about { background: var(--surface); border: 1px solid var(--border); border-radius: 1rem; padding: 1rem 1.2rem; color: var(--text); }
.about p { margin: 0 0 .8rem; color: var(--muted); }

/* ===== Contact ===== */
.contact { display: grid; grid-template-columns: repeat(12, 1fr); gap: .8rem; margin-top: 1rem; }
.contact-item { grid-column: span 12; display: flex; align-items: center; gap: .6rem; padding: .8rem 1rem; text-decoration: none; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: .9rem; font-weight: 600; }
.contact-item:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.icon { font-size: 1.1rem; }
@media (min-width: 640px) { .contact-item { grid-column: span 6; } }
@media (min-width: 980px) { .contact-item { grid-column: span 3; } }

/* ===== Footer ===== */
.site-footer { margin-top: 2rem; border-top: 1px solid var(--border); background: color-mix(in srgb, var(--bg) 85%, transparent); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; padding: 1.1rem 0; }
.back-to-top { color: var(--muted); text-decoration: none; }
.back-to-top:hover { color: var(--text); }

/* ===== Utilities ===== */
html { scroll-behavior: smooth; }
::selection { background: color-mix(in srgb, var(--accent) 40%, var(--accent-2) 60%); color: #0b0d10; }

/* ===== Print (for resume button to be useful if pointed to a PDF) ===== */
@media print {
  .site-header, .actions, .nav-links, .contact, .back-to-top { display: none !important; }
  body { background: #fff; color: #111; }
  .card, .about, .skill-col { break-inside: avoid; }
}