/* ── Orcheum Motion System ── */
/* Shared scroll animations + micro-interactions across all pages */

html { scroll-behavior: smooth; }

/* Calm, gently-decelerating curve shared across the system */
:root {
  --ease-calm: cubic-bezier(0.22, 0.61, 0.36, 1);
  --reveal-dur: 1.15s;
}

/* Base reveal state */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--reveal-dur) var(--ease-calm),
              transform var(--reveal-dur) var(--ease-calm);
  will-change: opacity, transform;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Reveal variants */
.reveal-left { transform: translateX(-40px) translateY(0); }
.reveal-left.in-view { transform: translateX(0); }

.reveal-right { transform: translateX(40px) translateY(0); }
.reveal-right.in-view { transform: translateX(0); }

.reveal-scale { transform: scale(0.97); }
.reveal-scale.in-view { transform: scale(1); }

/* Navbar scroll state — deepen blur/shadow once page scrolls */
.navbar {
  transition: box-shadow 0.3s ease, background 0.3s ease, padding 0.3s ease;
}
.navbar.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
}

/* Micro-interaction: lift on hover for cards & interactive tiles */
.model-chip, .powered-logo, .feature-item, .diagram-node,
.cta-model-chip, .model-item, .examples-card {
  transition: transform 0.5s var(--ease-calm),
              box-shadow 0.5s ease, border-color 0.5s ease;
}
.feature-item:hover { transform: translateY(-4px); }
.feature-item:hover .feature-icon { transform: scale(1.08); }
.feature-icon { transition: transform 0.5s var(--ease-calm); }

.model-chip:hover, .cta-model-chip:hover {
  transform: translateY(-2px);
}
.powered-logo:hover { transform: translateY(-2px); opacity: 1 !important; }

/* Button press + hover feel */
.btn-primary, .send-btn, .cta-send-btn,
.result-btn-primary, .result-btn-secondary, .footer-email-btn {
  transition: transform 0.35s var(--ease-calm), filter 0.35s ease, box-shadow 0.35s ease;
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-primary:active, .send-btn:active, .cta-send-btn:active { transform: scale(0.97); }

/* Chat / input cards: gentle glow breathe */
.chat-card, .cta-input-mockup {
  transition: transform 0.6s var(--ease-calm), box-shadow 0.6s ease;
}
.chat-card:hover, .cta-input-mockup:hover {
  transform: translateY(-3px);
}

/* Diagram nodes pop slightly on hover */
.diagram-node:hover { transform: scale(1.02); }
.diagram-model:hover .diagram-model-icon { transform: translateY(-3px) scale(1.05); }
.diagram-model-icon { transition: transform 0.5s var(--ease-calm); }

/* Animated dashed flow arrows (How it works diagram) — slow, calm breathe */
@keyframes flowPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}
.diagram-arrow svg { animation: flowPulse 3.6s ease-in-out infinite; }
.diagram-arrow:nth-of-type(2) svg { animation-delay: 0.6s; }

/* Link underline sweep for nav + footer links */
.nav-links a, .footer-links a, .footer-col a {
  position: relative;
}
.nav-links a::after, .footer-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -3px;
  width: 100%; height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease-calm);
  opacity: 0.6;
}
.nav-links a:hover::after, .footer-links a:hover::after { transform: scaleX(1); }

/* Form step entrance (register/signin) */
@keyframes stepIn {
  from { opacity: 0; transform: translateY(16px) scale(0.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Accessibility: honor reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .diagram-arrow svg { animation: none; }
  * { transition-duration: 0.01ms !important; }
}