/* Nuvira Technologies hub — shared styles. Dark theme, brand palette: purple / teal / magenta. */
:root {
  --bg: #0a0a13;
  --bg2: #101019;
  --card: #14141f;
  --line: #26263a;
  --text: #e8e8f0;
  --muted: #a7a7c0;
  --purple: #8b5cf6;
  --teal: #2dd4bf;
  --magenta: #ec4899;
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.4rem;
  padding: 0.8rem 1.4rem;
  background: rgba(10,10,19,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav .brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 700; letter-spacing: 0.04em; color: var(--text); }
.nav .brand img { width: 34px; height: 34px; border-radius: 8px; }
.nav .links { margin-left: auto; display: flex; gap: 1.1rem; flex-wrap: wrap; }
.nav .links a { color: var(--muted); font-size: 0.95rem; }
.nav .links a:hover, .nav .links a.active { color: var(--text); text-decoration: none; }
.nav .links a.active { border-bottom: 2px solid var(--purple); padding-bottom: 2px; }

/* ---- hero ---- */
.hero {
  text-align: center;
  padding: 4.5rem 1.5rem 3.5rem;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(139,92,246,0.22), transparent),
              radial-gradient(ellipse 60% 50% at 80% 110%, rgba(236,72,153,0.12), transparent),
              radial-gradient(ellipse 60% 50% at 20% 110%, rgba(45,212,191,0.10), transparent);
}
.hero .kicker { color: var(--teal); text-transform: uppercase; letter-spacing: 0.22em; font-size: 0.8rem; margin-bottom: 1rem; }
.hero h1 { font-size: clamp(2rem, 5.5vw, 3.4rem); line-height: 1.12; letter-spacing: 0.02em; margin-bottom: 1rem; }
.hero h1 .grad {
  background: linear-gradient(90deg, var(--purple), var(--magenta), var(--teal));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lede { color: var(--muted); max-width: 640px; margin: 0 auto 2rem; font-size: 1.08rem; }
.btn {
  display: inline-block; padding: 0.75rem 1.6rem; border-radius: 999px;
  background: linear-gradient(90deg, var(--purple), var(--magenta));
  color: #fff; font-weight: 600; border: none; cursor: pointer; font-size: 1rem;
}
.btn:hover { text-decoration: none; filter: brightness(1.12); }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); margin-left: 0.6rem; }
.btn.ghost:hover { border-color: var(--purple); }

/* ---- layout ---- */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.4rem; }
section.block { padding: 3rem 0; }
section.block h2 { font-size: 1.7rem; margin-bottom: 0.4rem; }
section.block .sub { color: var(--muted); margin-bottom: 1.8rem; max-width: 720px; }

/* ---- cards ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem; transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--purple); }
.card .icon { font-size: 1.9rem; margin-bottom: 0.7rem; }
.card h3 { margin-bottom: 0.5rem; font-size: 1.15rem; }
.card p { color: var(--muted); font-size: 0.96rem; margin-bottom: 1rem; }
.card .go { font-weight: 600; font-size: 0.95rem; }

/* ---- media cards (music/books) ---- */
.media-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.4rem; }
.media-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.media-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.media-card.book img { aspect-ratio: 2/3; }
.media-card .body { padding: 1.1rem 1.2rem 1.3rem; }
.media-card .tag { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--teal); margin-bottom: 0.35rem; }
.media-card h3 { font-size: 1.05rem; margin-bottom: 0.45rem; }
.media-card p { color: var(--muted); font-size: 0.92rem; margin-bottom: 0.9rem; }
.media-card .row { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.chip { font-size: 0.85rem; border: 1px solid var(--line); border-radius: 999px; padding: 0.3rem 0.85rem; color: var(--text); }
.chip:hover { border-color: var(--teal); text-decoration: none; }

/* ---- research page ---- */
.kv-table { width: 100%; border-collapse: collapse; margin: 1.2rem 0 2rem; font-size: 0.95rem; }
.kv-table th, .kv-table td { text-align: left; padding: 0.65rem 0.8rem; border-bottom: 1px solid var(--line); }
.kv-table th { color: var(--muted); font-weight: 600; }
.kv-table td.num { font-variant-numeric: tabular-nums; }
.pill { display: inline-block; font-size: 0.78rem; padding: 0.2rem 0.7rem; border-radius: 999px; margin-bottom: 1rem;
        border: 1px solid var(--teal); color: var(--teal); }
.callout { background: var(--bg2); border-left: 3px solid var(--purple); padding: 1.1rem 1.3rem; border-radius: 0 10px 10px 0; margin: 1.6rem 0; color: var(--muted); }
.callout strong { color: var(--text); }
.steps { counter-reset: step; list-style: none; margin: 1.2rem 0 2rem; }
.steps li { position: relative; padding: 1rem 1rem 1rem 3.4rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 0.9rem; }
.steps li::before { counter-increment: step; content: counter(step); position: absolute; left: 1rem; top: 1rem;
  width: 1.7rem; height: 1.7rem; border-radius: 50%; background: linear-gradient(135deg, var(--purple), var(--magenta));
  color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; }
.steps li strong { display: block; margin-bottom: 0.25rem; }
.steps li p { color: var(--muted); font-size: 0.95rem; }

/* ---- signup ---- */
.signup { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 2.2rem; text-align: center; }
.signup h2 { margin-bottom: 0.5rem; }
.signup p { color: var(--muted); max-width: 560px; margin: 0 auto 1.4rem; }
.signup form { display: flex; gap: 0.6rem; max-width: 480px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.signup input[type=email] { flex: 1 1 240px; padding: 0.75rem 1.1rem; border-radius: 999px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font-size: 1rem; }
.signup input[type=email]:focus { outline: none; border-color: var(--purple); }
.signup .note { font-size: 0.82rem; color: var(--muted); margin-top: 1rem; }
.hp { position: absolute; left: -9999px; } /* honeypot */

/* ---- footer ---- */
footer { border-top: 1px solid var(--line); margin-top: 3rem; padding: 2.2rem 1.4rem; text-align: center; color: var(--muted); font-size: 0.9rem; }
footer .flinks { display: flex; gap: 1.2rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1rem; }

@media (max-width: 640px) {
  .nav .links { gap: 0.8rem; }
  .nav .links a { font-size: 0.85rem; }
  section.block { padding: 2.2rem 0; }
}