/* ════════════════════════════════════════════════
   COMPONENTS — Buttons · Back-to-top · Scroll Reveal · Lightbox
   ════════════════════════════════════════════════ */

/* ── Back to Top ── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #0a0a0f;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 24px rgba(var(--accent-rgb), 0.4);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover   { transform: translateY(-3px); }

/* ── Sections — base ── */
section { padding: 7rem 5vw; }
.section-alt { background: var(--bg2); }

.section-label {
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}
.section-label::after {
  content: '';
  flex: 1;
  max-width: 40px;
  height: 1px;
  background: var(--accent);
}

h2 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.03em;
  margin-bottom: 3rem;
}
h2 em { color: var(--accent); font-style: normal; }

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal:nth-child(4) { transition-delay: 0.24s; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.85rem;
  border-radius: 100px;
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .01em;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn-primary { background: var(--accent); color: #0a0a0f; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(var(--accent-rgb), 0.35); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ── Lightbox ── */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .93);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  padding: 2rem;
  cursor: pointer;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}
.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: var(--text);
  font-size: 1.6rem;
  cursor: pointer;
  background: none;
  border: none;
  opacity: .7;
  transition: opacity 0.2s;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox-close:hover { opacity: 1; }