/* ─── Site Header ───────────────────────────────────── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,13,15,0.85);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 18px;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--text-1);
}

.header-tag {
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}

/* ─── Main Layout ───────────────────────────────────── */
.main {
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* ─── Hero ──────────────────────────────────────────── */
.hero {
  margin-bottom: 2.5rem;
  text-align: center;
}

.hero-title {
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-1);
  margin-bottom: 1rem;
}

.hero-title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}

.hero-title em::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  opacity: 0.4;
  border-radius: 99px;
}

.hero-sub {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 440px;
  margin: 0 auto;
}

/* ─── Footer ────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 12px;
  font-family: var(--font-display);
  letter-spacing: 0.02em;
}

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 480px) {
  .site-header { padding: 1rem 1.25rem; }
  .header-tag { display: none; }
  .main { padding: 2rem 1rem 3rem; }
  .hero-title { font-size: 1.75rem; }
}