/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Variables ── */
:root {
  --bg:        #0d1117;
  --surface:   #161b22;
  --border:    #30363d;
  --orange:    #f07a20;
  --orange-dim:#a84f0a;
  --yellow:    #f5c518;
  --green:     #3fb950;
  --green-dim: #238636;
  --text:      #e6edf3;
  --muted:     #8b949e;
  --accent:    #58a6ff;
}

/* ── Base ── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

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

/* ── Nav ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13,17,23,0.95);
  backdrop-filter: blur(8px);
  z-index: 10;
}

nav ul,
.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav ul li a,
.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.15s;
}

nav ul li a:hover,
.nav-links a:hover { color: var(--text); text-decoration: none; }

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
}

.nav-brand:hover { text-decoration: none; }
.nav-brand .dot { color: var(--green); font-size: 1.3rem; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.6rem;
  border-radius: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}

.btn:hover { opacity: 0.85; text-decoration: none; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.cta-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Section shared ── */
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.section-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 3rem;
}

/* ── Divider ── */
.divider { border: none; border-top: 1px solid var(--border); }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}

footer a { color: var(--muted); }
footer a:hover { color: var(--text); }