/* Nivyr — single stylesheet, no frameworks, no external requests. */

:root {
  --bg: #0d1117;
  --bg-alt: #131a23;
  --panel: #1a2330;
  --text: #e6edf3;
  --text-dim: #9aa7b6;
  --accent: #5eead4;
  --accent-strong: #2dd4bf;
  --border: #263243;
  --max-w: 1060px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-strong), #0ea5e9);
  color: #06251f;
  font-weight: 800;
}

.site-nav { display: flex; align-items: center; gap: 1.6rem; }
.site-nav a { color: var(--text-dim); font-size: 0.95rem; }
.site-nav a:hover { color: var(--text); text-decoration: none; }

.nav-cta {
  padding: 0.45rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--accent) !important;
}
.nav-cta:hover { background: rgba(94, 234, 212, 0.1); }

/* Hero */

.hero {
  padding: 6.5rem 0 5.5rem;
  background:
    radial-gradient(60rem 30rem at 80% -10%, rgba(45, 212, 191, 0.12), transparent),
    radial-gradient(40rem 25rem at 10% 110%, rgba(14, 165, 233, 0.10), transparent);
}

.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.accent { color: var(--accent); }

.lead {
  margin: 1.4rem 0 2.2rem;
  max-width: 38rem;
  color: var(--text-dim);
  font-size: 1.15rem;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent-strong); color: #052e2b; }
.btn-primary:hover { background: var(--accent); }
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Sections */

.section { padding: 4.5rem 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section h2 {
  font-size: 1.9rem;
  letter-spacing: -0.01em;
  margin-bottom: 2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.4rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.8rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--accent-strong); transform: translateY(-2px); }

.card-icon { font-size: 1.7rem; margin-bottom: 0.9rem; }

.card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.card p { color: var(--text-dim); font-size: 0.97rem; }

/* About */

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
  align-items: center;
}
.about-grid p { color: var(--text-dim); margin-bottom: 1rem; }

.stat-stack { display: grid; gap: 1rem; }

.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.4rem;
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
}

.stat-num { font-size: 1.6rem; font-weight: 800; color: var(--accent); }
.stat-label { color: var(--text-dim); font-size: 0.95rem; }

/* Footer */

.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.92rem;
}
.site-footer .fine { margin-top: 0.4rem; color: #6b7787; font-size: 0.85rem; }

/* Responsive */

@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; }
  .site-nav a:not(.nav-cta) { display: none; }
  .hero { padding: 4.5rem 0 4rem; }
}