/* ===========================================
   Professional Black Theme (Yusufjon Kumakov)
   =========================================== */

/* Base palette (true black) */
:root{
  --bg: #000000;        /* full black background */
  --panel: #0b0b0b;     /* cards/nav black */
  --panel-2: #0f0f0f;   /* hero black */
  --text: #eaeaea;      /* primary text */
  --muted: #b5b5b5;     /* secondary text */

  /* Accent gradient (cyan → purple) */
  --accent-1: #00d8ff;
  --accent-2: #9b5cff;
  --accent-3: #18e0ff;
  --accent-4: #bda4ff;

  --border: #1a1a1a;    /* subtle borders */
  --ring: rgba(155, 92, 255, 0.25);
  --gold: #ffcc4d;      /* nav active underline / highlight */
}

/* Optional bias for light-pref users (keeps dark tone) */
@media (prefers-color-scheme: light) {
  :root{
    --bg: #0a0a0a;
    --panel: #111111;
    --panel-2: #151515;
    --text: #f2f2f2;
    --muted: #c8c8c8;
    --accent-1: #00d8ff;
    --accent-2: #9b5cff;
    --accent-3: #18e0ff;
    --accent-4: #bda4ff;
    --border: #1d1d1d;
    --ring: rgba(0, 216, 255, 0.25);
    --gold: #ffcc4d;
  }
}

/* Base */
* { box-sizing: border-box; }
html, body { margin:0; padding:0; }
body {
  font-family: ui-sans-serif, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background:
    radial-gradient(1200px 800px at 10% -10%, rgba(24, 224, 255, 0.12), transparent 60%),
    radial-gradient(900px 600px at 120% 0%, rgba(155, 92, 255, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
}

/* Skip link (a11y) */
.skip {
  position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip:focus {
  position: static; width:auto; height:auto; padding:8px 12px;
  background: var(--accent-2); color:white; border-radius:10px;
}

/* Header / Nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0)) , var(--panel);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.wrap {
  max-width: 1120px; margin: 0 auto; height: 72px;
  padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand {
  display:flex; align-items:center; gap:12px; text-decoration:none; color: var(--text);
  font-weight: 800; letter-spacing:.25px;
}
.logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: conic-gradient(from 180deg at 50% 50%, var(--accent-1), var(--accent-2), var(--accent-1));
  box-shadow: 0 6px 30px var(--ring), inset 0 0 0 1px rgba(255,255,255,0.08);
}
.nav { display:flex; gap: 28px; flex-wrap: wrap; }
.nav a {
  text-decoration: none; text-transform: uppercase; letter-spacing: .08em;
  font-weight: 800; color: var(--text); position: relative; padding: 6px 0;
  opacity: .95;
}
.nav a:hover { opacity: 1; }
.nav a.active { color: var(--gold); }
.nav a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -8px; height: 3px;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  border-radius: 3px;
}

/* Hero */
.hero {
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(1000px 700px at 20% 0%, rgba(24, 224, 255, 0.12), transparent 50%),
    radial-gradient(900px 650px at 85% 10%, rgba(155, 92, 255, 0.15), transparent 60%),
    var(--panel-2);
}
.hero-inner {
  max-width: 1120px; margin: 0 auto; padding: 42px 20px;
}
.hero h1 {
  margin: 0 0 6px;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.subtitle { color: var(--muted); margin-top: 6px; }

/* Layout + Cards */
.container { max-width: 1120px; margin: 24px auto; padding: 0 20px; }
.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0)) , var(--panel);
  border: 1px solid var(--border); border-radius: 14px;
  padding: 22px; margin-bottom: 18px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.05), 0 12px 30px rgba(124,58,237,0.05);
}
h2 { margin: 0 0 10px; color: var(--text); font-weight: 900; }
h2 .grad {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
ul { margin: 6px 0 0 20px; }
a { color: var(--accent-3); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Skill chips */
.chips { display:flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip {
  display:inline-flex; align-items:center; gap: 8px;
  padding: 8px 12px; border-radius: 999px;
  background: linear-gradient(180deg, rgba(24,224,255,0.12), rgba(155,92,255,0.12));
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 700; letter-spacing: .2px;
}
.chip::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--accent-1), var(--accent-2));
  box-shadow: 0 0 10px var(--ring);
}

/* Footer */
footer {
  color: var(--muted); text-align: center;
  padding: 22px 16px; border-top: 1px solid var(--border); margin-top: 24px;
}