/* ============================================================
   PTC landing page (/) — standalone styles for public/landing.html
   Brand: Playfair Display + Inter on dark base with gold accent.
   (Decks are rendered separately by Marp; see themes/ptc.css.)
   ============================================================ */

:root {
  --gold: #c9a96e;
  --gold-light: #d4b97e;
  --dark: #0a0a0a;
  --text: #e8e4df;
  --text-muted: #9a958e;
  --text-light: #c4bfb8;
  --border-gold-stronger: rgba(201, 169, 110, 0.18);
  --tag-bg: rgba(201, 169, 110, 0.08);
  --tag-border: rgba(201, 169, 110, 0.15);
  --serif: 'Playfair Display', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--dark); color: var(--text); font-family: var(--sans); }

.eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 1.2rem;
}
.gold-line {
  display: block;
  width: 52px;
  height: 1px;
  background: var(--gold);
  margin: 1.6rem 0;
  border: 0;
}
.gold-line.center { margin-left: auto; margin-right: auto; }

.btn {
  display: inline-block;
  padding: 0.9rem 1.8rem;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--gold);
  border: 1px solid var(--gold);
  background: transparent;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  cursor: pointer;
}
.btn:hover { background: var(--gold); color: var(--dark); }
.btn.solid { background: var(--gold); color: var(--dark); }
.btn.solid:hover { background: var(--gold-light); border-color: var(--gold-light); }
.btn.big { padding: 1.1rem 2.4rem; font-size: 0.8rem; }

/* ----------  Top bar (brand · nav · actions)  ---------- */
.ptc-topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.6rem;
  background: rgba(10, 10, 10, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-gold-stronger);
}
.ptc-topbar .brand {
  font-size: 0.62rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
  text-decoration: none;
  justify-self: start;
}
.ptc-topbar .nav { display: flex; gap: 0.3rem; justify-self: center; }
.ptc-topbar .actions { display: flex; gap: 0.6rem; align-items: center; justify-self: end; }
.ptc-topbar a {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem 0.9rem;
  border: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.ptc-topbar a:hover { color: var(--gold); border-color: var(--border-gold-stronger); }
.ptc-topbar .nav a.active { color: var(--gold); background: var(--tag-bg); border-color: var(--tag-border); }

@media (max-width: 600px) {
  .ptc-topbar { grid-template-columns: auto 1fr; padding: 0.7rem 1rem; }
  .ptc-topbar .brand { display: none; }
  .ptc-topbar .nav { justify-self: start; }
  .ptc-topbar .actions { justify-self: end; }
  .ptc-topbar a { padding: 0.4rem 0.6rem; font-size: 0.55rem; }
}

/* ----------  Hero  ---------- */
.landing-page { min-height: 100vh; background: var(--dark); }
.landing-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 5rem 6vw;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10, 10, 10, 0.55) 0%, rgba(10, 10, 10, 0.60) 50%, rgba(10, 10, 10, 0.88) 100%);
}
.hero-content { position: relative; z-index: 1; max-width: 900px; }
.landing-page h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.4rem, 5.5vw, 4.6rem);
  line-height: 1.15;
  color: #fff;
  margin-bottom: 1.2rem;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.45);
}
.landing-page h1 em { font-style: italic; color: var(--gold); }
.hero-subtitle {
  font-size: 1.15rem;
  font-weight: 300;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto 2.2rem;
  line-height: 1.75;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.55);
}
.landing-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1.4rem;
}