/* styles.css — one stylesheet. Dark premium brand palette. */

:root {
  --bg:        #0b0d12;
  --bg-2:      #10131b;
  --panel:     #141824;
  --panel-2:   #1a1f2e;
  --line:      #262c3d;
  --ink:       #eef1f7;
  --ink-soft:  #b7bfd0;
  --ink-mute:  #7d8598;
  --accent:    #7cf0c8;   /* signal green — the brand mark */
  --accent-2:  #8ab4ff;
  --radius:    16px;
  --maxw:      1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(124,240,200,.10), transparent 60%),
    radial-gradient(900px 560px at 8% 4%, rgba(138,180,255,.08), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #04120c; padding: 10px 16px; border-radius: 8px; z-index: 20;
}
.skip:focus { left: 12px; top: 12px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  max-width: var(--maxw); margin: 0 auto;
  padding: 18px 24px;
  backdrop-filter: blur(10px);
}
.nav::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(11,13,18,.86), rgba(11,13,18,.3));
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 600; letter-spacing: .2px; font-size: 1.02rem; }
.brand .mark { color: var(--accent); }
.nav-links { display: flex; gap: 22px; font-size: .93rem; color: var(--ink-soft); }
.nav-links a:hover { color: var(--ink); }

/* ---------- Layout ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; border-top: 1px solid var(--line); }
.section-head { margin-bottom: 40px; max-width: 640px; }
.section-head h2 {
  font-family: "Fraunces", Georgia, serif; font-weight: 600;
  font-size: clamp(1.7rem, 4vw, 2.4rem); margin: 0 0 10px;
  letter-spacing: -.5px;
}
.section-head p { color: var(--ink-soft); margin: 0; }

/* ---------- Hero ---------- */
.hero { padding: 92px 0 72px; }
.eyebrow {
  font-family: "JetBrains Mono", monospace; font-size: .8rem; letter-spacing: 2px;
  text-transform: uppercase; color: var(--accent); margin: 0 0 22px;
}
.hero h1 {
  font-family: "Fraunces", Georgia, serif; font-weight: 600;
  font-size: clamp(2.2rem, 6.2vw, 4rem); line-height: 1.08; letter-spacing: -1px;
  margin: 0 0 26px;
}
.hero h1 em { color: var(--accent); font-style: italic; }
.lede { max-width: 640px; color: var(--ink-soft); font-size: 1.1rem; margin: 0 0 34px; }

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink);
  font-weight: 500; font-size: .96rem; transition: .18s ease;
  background: var(--panel);
}
.btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #04120c; border-color: var(--accent); }
.btn-primary:hover { box-shadow: 0 10px 30px rgba(124,240,200,.28); }

.hero-links {
  list-style: none; display: flex; flex-wrap: wrap; gap: 26px;
  padding: 0; margin: 34px 0 0; font-size: .92rem; color: var(--ink-mute);
  font-family: "JetBrains Mono", monospace;
}
.hero-links a { border-bottom: 1px solid transparent; padding-bottom: 2px; }
.hero-links a:hover { color: var(--ink); border-color: var(--accent); }

/* ---------- Project cards ---------- */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; display: flex; flex-direction: column; gap: 14px;
  transition: .2s ease;
}
.card:hover { border-color: rgba(124,240,200,.5); transform: translateY(-3px); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.card-top h3 {
  margin: 0; font-family: "JetBrains Mono", monospace; font-size: 1.25rem; letter-spacing: -.3px;
}
.badge {
  font-size: .68rem; letter-spacing: 1px; text-transform: uppercase;
  color: var(--accent); border: 1px solid rgba(124,240,200,.4);
  padding: 3px 9px; border-radius: 999px;
}
.card-tag {
  margin: 0; font-size: .78rem; letter-spacing: .5px; text-transform: uppercase;
  color: var(--accent-2); font-family: "JetBrains Mono", monospace;
}
.card-problem, .card-approach { margin: 0; font-size: .95rem; color: var(--ink-soft); }
.card-problem span, .card-approach span { color: var(--ink); font-weight: 600; }
.stack {
  list-style: none; padding: 0; margin: 4px 0 0;
  display: flex; flex-wrap: wrap; gap: 8px;
}
.stack li {
  font-size: .74rem; color: var(--ink-mute);
  border: 1px solid var(--line); border-radius: 6px; padding: 3px 9px;
  font-family: "JetBrains Mono", monospace;
}
.card-link {
  margin-top: auto; padding-top: 8px; color: var(--accent);
  font-weight: 500; font-size: .95rem;
}
.card-link:hover { text-decoration: underline; }

/* ---------- Videos ---------- */
.videos { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.video {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
}
.video h3 { margin: 16px 20px 6px; font-size: 1.05rem; }
.video p { margin: 0 20px 20px; color: var(--ink-soft); font-size: .92rem; }
.video-frame { position: relative; aspect-ratio: 16 / 9; background: #000; }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-frame.placeholder {
  display: grid; place-items: center;
  background: repeating-linear-gradient(135deg, var(--panel-2), var(--panel-2) 12px, var(--panel) 12px, var(--panel) 24px);
  color: var(--ink-mute); font-size: 2rem;
}
.video-empty { border-style: dashed; }

/* ---------- About / Contact ---------- */
.about-body { max-width: 680px; display: grid; gap: 18px; }
.about-body p { margin: 0; color: var(--ink-soft); font-size: 1.05rem; }
.about-body strong { color: var(--ink); }
.contact-lede { max-width: 620px; color: var(--ink-soft); font-size: 1.1rem; margin: 0 0 28px; }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--maxw); margin: 0 auto; padding: 40px 24px 60px;
  border-top: 1px solid var(--line); color: var(--ink-mute); font-size: .86rem;
}
.muted { color: var(--ink-mute); }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .cards, .videos { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .section { padding: 64px 0; }
}
@media (max-width: 380px) {
  main, .nav, .footer { padding-left: 16px; padding-right: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}

/* ---------- All repositories (live from GitHub) ---------- */
.repos-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; margin: 46px 0 18px;
}
.repos-head h3 { margin: 0; font-family: "Fraunces", Georgia, serif; font-weight: 600; font-size: 1.2rem; }
.repos-head a { color: var(--accent); font-size: .9rem; }
.repos-head a:hover { text-decoration: underline; }
.repogrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(258px, 1fr)); gap: 14px; }
.repo {
  display: flex; flex-direction: column; gap: 6px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 15px 17px; transition: .18s ease; min-height: 96px;
}
.repo:hover { border-color: rgba(124,240,200,.5); transform: translateY(-2px); }
.repo .rname { font-family: ui-monospace, "JetBrains Mono", Menlo, monospace; font-size: .93rem; color: var(--ink); }
.repo .rdesc { font-size: .84rem; color: var(--ink-soft); line-height: 1.5; flex: 1; }
.repo .rmeta { display: flex; gap: 14px; font-family: ui-monospace, Menlo, monospace; font-size: .72rem; color: var(--ink-mute); margin-top: 2px; }
.repo .rmeta .lang::before { content: "● "; color: var(--accent-2); }
@media (max-width: 560px) { .repogrid { grid-template-columns: 1fr; } }