/* ── ProtFunc Landing Page Styles ─────────────────────────────────────── */

/* Landing wrapper */
#pf-landing {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

#pf-app { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
#pf-app[hidden] { display: none !important; }

/* Nav */
#pf-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px;
  height: 60px;
  background: rgba(245,247,250,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.pf-nav-logo { font-weight: 700; font-size: 1rem; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
.pf-nav-logo em { font-style: normal; color: var(--accent); }
.pf-nav-author { font-size: 0.75rem; color: var(--text-muted); margin-right: auto; padding-left: 8px; }
.pf-nav-links { display: flex; gap: 28px; align-items: center; }
.pf-nav-links a { font-size: 0.875rem; color: var(--text-muted); text-decoration: none; transition: color 0.15s; }
.pf-nav-links a:hover { color: var(--text); }
.pf-nav-enter {
  background: var(--accent); color: #fff;
  border: none; border-radius: 8px;
  padding: 8px 18px; font-size: 0.875rem; font-weight: 500;
  cursor: pointer; transition: background 0.15s;
}
.pf-nav-enter:hover { background: var(--accent-2); }

/* Hero */
#pf-hero {
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center;
  padding: 100px 24px 60px;
  position: relative;
}
#pf-hero-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0.18; pointer-events: none;
}
.pf-hero-content { position: relative; max-width: 760px; margin: 0 auto; }
.pf-hero-eyebrow {
  display: inline-block; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 20px;
  padding: 4px 12px; border: 1px solid rgba(99,102,241,0.3); border-radius: 20px;
  background: rgba(99,102,241,0.06);
}
.pf-hero-h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700; line-height: 1.1; letter-spacing: -0.03em;
  color: var(--text); margin-bottom: 20px;
}
.pf-hero-h1 em { font-style: normal; color: var(--accent); }
.pf-hero-sub {
  font-size: clamp(16px, 2vw, 18px); color: var(--text-muted);
  line-height: 1.65; margin-bottom: 36px; max-width: 600px; margin-inline: auto;
}
.pf-hero-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.pf-cta-primary {
  background: var(--accent); color: #fff;
  border: none; border-radius: 10px;
  padding: 14px 28px; font-size: 1rem; font-weight: 500;
  cursor: pointer; transition: background 0.15s, transform 0.1s;
}
.pf-cta-primary:hover { background: var(--accent-2); transform: translateY(-1px); }
.pf-cta-secondary {
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 28px; font-size: 1rem; font-weight: 500;
  cursor: pointer; transition: border-color 0.15s, transform 0.1s;
}
.pf-cta-secondary:hover { border-color: var(--accent); transform: translateY(-1px); }

/* Scroll hint */
.pf-scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.05em; text-transform: uppercase;
  animation: pfBob 2s ease-in-out infinite;
}
.pf-scroll-hint svg { width: 18px; height: 18px; stroke: var(--text-muted); }
@keyframes pfBob { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(5px)} }

/* Stat strip */
#pf-stat-strip {
  display: flex; justify-content: center; gap: 48px; flex-wrap: wrap;
  padding: 32px 40px;
  background: var(--surface);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.pf-stat-item { text-align: center; }
.pf-stat-val { display: block; font-size: 1.8rem; font-weight: 700; color: var(--accent); letter-spacing: -0.03em; }
.pf-stat-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }

/* Scrollytell sections */
.pf-scrollytell {
  min-height: 100vh; display: flex; align-items: center;
  padding: 80px 40px;
}
.pf-scrollytell-inner {
  max-width: 1000px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}
.pf-scrollytell-inner.reverse { direction: rtl; }
.pf-scrollytell-inner.reverse > * { direction: ltr; }
.pf-story-canvas-wrap {
  width: 100%; aspect-ratio: 1;
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.pf-story-canvas-wrap canvas { width: 100% !important; height: 100% !important; }
.pf-story-text { display: flex; flex-direction: column; gap: 16px; }
.pf-stage-num { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.pf-story-text h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; color: var(--text); }
.pf-story-text p { font-size: 1rem; color: var(--text-muted); line-height: 1.7; }
.pf-story-stat {
  display: inline-block; font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem; background: var(--accent-light); color: var(--accent);
  padding: 8px 16px; border-radius: 8px; border: 1px solid rgba(99,102,241,0.2);
}

/* Footer CTA */
#pf-footer-cta {
  min-height: 60vh; display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center; padding: 80px 24px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
#pf-footer-cta h2 { font-size: clamp(28px, 5vw, 48px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 16px; color: var(--text); }
#pf-footer-cta p { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 32px; max-width: 500px; }
#pf-footer-cta .pf-hero-ctas { margin: 0; }

/* Footer */
.pf-home-footer {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 40px; font-size: 0.75rem; color: var(--text-muted);
  border-top: 1px solid var(--border); background: var(--surface);
  flex-wrap: wrap; gap: 8px;
}
.pf-home-footer a { color: var(--text-muted); text-decoration: none; }
.pf-home-footer a:hover { color: var(--accent); }

/* Reveal animations */
.pf-reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.pf-reveal.in { opacity: 1; transform: translateY(0); }
.pf-reveal-d1 { transition-delay: 0.1s; }
.pf-reveal-d2 { transition-delay: 0.2s; }
.pf-reveal-d3 { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  .pf-reveal { opacity: 1; transform: none; transition: none; }
  #pf-hero-canvas { display: none; }
}

@media (max-width: 700px) {
  .pf-scrollytell-inner { grid-template-columns: 1fr; gap: 32px; }
  .pf-scrollytell-inner.reverse { direction: ltr; }
  #pf-nav { padding: 0 20px; }
  .pf-home-footer { flex-direction: column; text-align: center; }
}