/* ═══════════════════════════════════════════
   TUVO — Reusable Components
   Buttons, Toast, Cards, Badges, Reveals, Transitions
   ═══════════════════════════════════════════ */

/* ═══════════════════════════════════════════
   Buttons — pill shape, scale hover, glow shadow
   ═══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-smooth);
  position: relative;
}
.btn:hover {
  transform: scale(1.03);
}
.btn:active {
  transform: scale(0.98);
  transition-duration: 0.1s;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-text-inverse);
  box-shadow: 0 8px 32px var(--color-primary-glow);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-text);
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  box-shadow: 0 8px 32px var(--color-accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary-border);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  box-shadow: 0 8px 32px var(--color-primary-glow);
}

.btn-ghost {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  border: 1px solid var(--color-border-accent);
}
.btn-ghost:hover {
  background: var(--color-primary-glow);
  border-color: var(--color-primary);
}

.btn-sm { padding: 10px 22px; font-size: 14px; }
.btn-lg { padding: 18px 40px; font-size: 16px; }

/* ═══════════════════════════════════════════
   Page Load Transition
   ═══════════════════════════════════════════ */
.page-transition {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 9999;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.8s ease-out;
}
.page-transition.fade-out { opacity: 0; }
.page-transition.fade-in { opacity: 1; transition: opacity 0.6s ease-in; }

/* ═══════════════════════════════════════════
   Floating Dots — decorative background
   ═══════════════════════════════════════════ */
.floating-dots {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.dot {
  position: absolute;
  border-radius: 50%;
  opacity: 0;
  animation: floatDot 5s ease-in-out infinite;
}
.dot:nth-child(1) { width: 6px; height: 6px; top: 12%; left: 8%; background: var(--color-primary); animation-delay: 0s; }
.dot:nth-child(2) { width: 4px; height: 4px; top: 22%; right: 12%; background: var(--color-accent); animation-delay: 0.8s; }
.dot:nth-child(3) { width: 5px; height: 5px; top: 55%; left: 5%; background: var(--color-accent); animation-delay: 1.5s; }
.dot:nth-child(4) { width: 4px; height: 4px; top: 75%; right: 8%; background: var(--color-primary); animation-delay: 2.2s; }
.dot:nth-child(5) { width: 3px; height: 3px; top: 8%; left: 45%; background: var(--color-primary); animation-delay: 3s; }
.dot:nth-child(6) { width: 5px; height: 5px; top: 40%; right: 4%; background: var(--color-accent); animation-delay: 1s; }

@keyframes floatDot {
  0%, 100% { opacity: 0; transform: scale(0.8) translateY(0); }
  50% { opacity: 0.35; transform: scale(1) translateY(-8px); }
}

/* ═══════════════════════════════════════════
   Scroll Animations — IntersectionObserver driven
   ═══════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-slow) var(--ease-smooth),
              transform var(--duration-slow) var(--ease-smooth);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════
   Accent Separator Line
   ═══════════════════════════════════════════ */
.accent-line {
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  margin: var(--space-xl) auto 0;
  transition: width 1.2s var(--ease-smooth);
}
.accent-line.visible {
  width: 60px;
}

/* ═══════════════════════════════════════════
   Toast Notification
   ═══════════════════════════════════════════ */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.4s var(--ease-smooth), opacity 0.4s var(--ease-smooth);
  white-space: nowrap;
}
.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ═══════════════════════════════════════════
   Mobile — 768px breakpoint (components)
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {
  .floating-dots { display: none; }
}