/* ===========================================================
   Vibium.club — Tutorials, Videos & Updates
   Static site stylesheet
   =========================================================== */

:root {
  --bg: #0b0d12;
  --bg-soft: #11141c;
  --bg-card: #151926;
  --bg-card-hover: #1b2032;
  --border: #232a3d;
  --text: #e7ecf5;
  --text-dim: #9aa6bd;
  --text-faint: #6b7689;
  --accent: #6ee7b7;
  --accent-2: #38bdf8;
  --accent-3: #a78bfa;
  --gradient: linear-gradient(120deg, #38bdf8 0%, #6ee7b7 50%, #a78bfa 100%);
  --code-bg: #0d1019;
  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1120px;
  --shadow: 0 10px 40px -12px rgba(0, 0, 0, 0.6);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", "Fira Code", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(900px 500px at 80% -10%, rgba(56, 189, 248, 0.10), transparent),
    radial-gradient(800px 500px at 0% 0%, rgba(167, 139, 250, 0.08), transparent);
  background-attachment: fixed;
}

a { color: var(--accent-2); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--accent); }

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

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Navbar ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(11, 13, 18, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--text); }
.brand:hover { color: var(--text); }
.brand .logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--gradient);
  display: grid; place-items: center; font-weight: 800; color: #07121a; font-size: 1rem;
}
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  color: var(--text-dim); padding: 8px 14px; border-radius: 8px; font-size: .94rem; font-weight: 500;
}
.nav-links a:hover { color: var(--text); background: var(--bg-card); }
.nav-links a.active { color: var(--text); background: var(--bg-card); }
.nav-links .gh {
  border: 1px solid var(--border); display: inline-flex; align-items: center; gap: 7px;
}
.nav-toggle { display: none; background: none; border: 0; color: var(--text); font-size: 1.5rem; cursor: pointer; }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 72px; text-align: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-card); color: var(--text-dim); font-size: .82rem; margin-bottom: 26px;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.hero h1 { font-size: clamp(2.4rem, 6vw, 4rem); line-height: 1.08; font-weight: 800; letter-spacing: -1.5px; margin-bottom: 22px; }
.hero p.lead { font-size: clamp(1.05rem, 2.4vw, 1.3rem); color: var(--text-dim); max-width: 680px; margin: 0 auto 36px; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 26px; border-radius: 11px; font-weight: 600; font-size: .98rem;
  border: 1px solid transparent; cursor: pointer; transition: transform .12s ease, box-shadow .15s ease, background .15s ease;
}
.btn-primary { background: var(--gradient); color: #07121a; }
.btn-primary:hover { color: #07121a; transform: translateY(-2px); box-shadow: 0 12px 30px -10px rgba(110, 231, 183, 0.5); }
.btn-ghost { background: var(--bg-card); border-color: var(--border); color: var(--text); }
.btn-ghost:hover { color: var(--text); background: var(--bg-card-hover); transform: translateY(-2px); }

/* ---------- Section ---------- */
section.block { padding: 64px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-head .eyebrow { color: var(--accent); font-weight: 600; font-size: .82rem; letter-spacing: 1.5px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 800; letter-spacing: -1px; margin: 10px 0 14px; }
.section-head p { color: var(--text-dim); font-size: 1.05rem; }

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.card:hover { transform: translateY(-4px); border-color: #2f3a55; background: var(--bg-card-hover); }
.card .icon { font-size: 1.6rem; margin-bottom: 14px; display: block; }
.card h3 { font-size: 1.18rem; margin-bottom: 8px; font-weight: 700; }
.card p { color: var(--text-dim); font-size: .96rem; }

/* ---------- Maintainer ---------- */
.maintainer-card { display: flex; gap: 24px; align-items: center; max-width: 680px; margin: 0 auto; text-align: left; }
.maintainer-card .avatar { width: 96px; height: 96px; border-radius: 50%; flex-shrink: 0; border: 2px solid var(--border); object-fit: cover; background: var(--bg-soft); }
.maintainer-card h3 { font-size: 1.3rem; margin-bottom: 2px; }
.maintainer-card .role { color: var(--accent); font-size: .92rem; font-weight: 600; margin-bottom: 10px; }
.maintainer-card p { color: var(--text-dim); font-size: .96rem; }
.maintainer-links { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 14px; }
.maintainer-links a { font-size: .9rem; font-weight: 600; }
@media (max-width: 560px) {
  .maintainer-card { flex-direction: column; text-align: center; }
  .maintainer-links { justify-content: center; }
}

/* ---------- Code blocks ---------- */
.code {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 18px 20px; overflow-x: auto; margin: 18px 0;
  position: relative;
}
.code pre { font-family: var(--mono); font-size: .9rem; color: #cdd6e6; line-height: 1.7; }
.code .cmt { color: var(--text-faint); }
.code .tok { color: var(--accent); }
.code .str { color: #f0a675; }
.code-label {
  font-family: var(--mono); font-size: .72rem; color: var(--text-faint);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; display: block;
}
.copy-btn {
  position: absolute; top: 10px; right: 10px;
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-dim);
  font-size: .72rem; padding: 5px 10px; border-radius: 6px; cursor: pointer; font-family: var(--font);
}
.copy-btn:hover { color: var(--text); border-color: #3a4763; }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 4px; }
.tab {
  padding: 8px 16px; border-radius: 8px 8px 0 0; background: transparent; border: 1px solid transparent;
  color: var(--text-dim); cursor: pointer; font-family: var(--font); font-size: .92rem; font-weight: 500;
}
.tab.active { color: var(--text); background: var(--code-bg); border-color: var(--border); border-bottom-color: var(--code-bg); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Page header (subpages) ---------- */
.page-head { padding: 70px 0 30px; text-align: center; }
.page-head h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -1px; }
.page-head p { color: var(--text-dim); font-size: 1.1rem; max-width: 620px; margin: 16px auto 0; }

/* ---------- Steps ---------- */
.steps { display: grid; gap: 18px; counter-reset: step; }
.step {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 26px 24px 70px; position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 22px; top: 24px;
  width: 32px; height: 32px; border-radius: 9px; background: var(--gradient);
  color: #07121a; font-weight: 800; display: grid; place-items: center; font-size: 1rem;
}
.step h3 { font-size: 1.15rem; margin-bottom: 6px; }
.step p { color: var(--text-dim); font-size: .96rem; }

/* ---------- Video cards ---------- */
.video-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform .15s ease, border-color .15s ease; }
.video-card:hover { transform: translateY(-4px); border-color: #2f3a55; }
.video-embed { position: relative; padding-bottom: 56.25%; height: 0; background: #000; }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-meta { padding: 20px 22px; }
.video-meta h3 { font-size: 1.1rem; margin-bottom: 8px; }
.video-meta .vmeta { color: var(--text-faint); font-size: .85rem; display: flex; gap: 10px; align-items: center; }
.video-meta p { color: var(--text-dim); font-size: .93rem; margin-top: 10px; }

/* ---------- Blog list ---------- */
.blog-item {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.blog-item:hover { transform: translateY(-3px); border-color: #2f3a55; background: var(--bg-card-hover); }
.blog-thumb {
  flex-shrink: 0; width: 56px; height: 56px; border-radius: 12px; display: grid; place-items: center;
  font-size: 1.5rem; background: var(--bg-soft); border: 1px solid var(--border);
}
.blog-body { flex: 1; min-width: 0; }
.blog-body h3 { font-size: 1.18rem; margin-bottom: 6px; }
.blog-body h3 a { color: var(--text); }
.blog-body h3 a:hover { color: var(--accent); }
.blog-body p { color: var(--text-dim); font-size: .95rem; }
.blog-source { color: var(--text-faint); font-size: .82rem; margin-top: 10px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.pill { padding: 3px 10px; border-radius: 999px; background: var(--bg-soft); border: 1px solid var(--border); font-size: .76rem; color: var(--text-dim); }

/* ---------- Updates / timeline ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--border); }
.release { position: relative; margin-bottom: 30px; }
.release::before {
  content: ""; position: absolute; left: -26px; top: 6px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent); box-shadow: 0 0 10px rgba(110, 231, 183, .5);
}
.release .ver { font-family: var(--mono); font-weight: 700; font-size: 1.05rem; color: var(--text); }
.release .date { color: var(--text-faint); font-size: .85rem; margin-left: 10px; }
.release ul { margin: 12px 0 0 18px; color: var(--text-dim); }
.release ul li { margin-bottom: 6px; }

/* ---------- Callout ---------- */
.callout {
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  background: var(--bg-card); border-radius: var(--radius-sm); padding: 16px 20px; margin: 20px 0;
  color: var(--text-dim); font-size: .95rem;
}
.callout strong { color: var(--text); }

/* ---------- Stats ---------- */
.stats { display: flex; gap: 40px; justify-content: center; flex-wrap: wrap; margin-top: 44px; }
.stat { text-align: center; }
.stat .num { font-size: 2.1rem; font-weight: 800; }
.stat .lbl { color: var(--text-faint); font-size: .86rem; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border); margin-top: 60px; padding: 48px 0 36px; color: var(--text-dim);
}
.footer-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.footer-grid h4 { color: var(--text); font-size: .9rem; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 1px; }
.footer-col a { display: block; color: var(--text-dim); font-size: .92rem; padding: 4px 0; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border); font-size: .85rem; color: var(--text-faint); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column;
    background: var(--bg-soft); border-bottom: 1px solid var(--border); padding: 12px 16px; gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .nav-toggle { display: block; }
  .blog-item { flex-direction: column; }
}