/* ============================================
   La Bella Mbriana — Animation System
   ============================================ */

/* --- Custom Properties --- */
:root {
  --anim-duration: 0.7s;
  --anim-duration-fast: 0.4s;
  --anim-duration-slow: 1s;
  --anim-easing: cubic-bezier(0.16, 1, 0.3, 1);
  --anim-distance: 40px;
  --anim-stagger: 0.12s;
  --primary: #A04830;
  --primary-glow: rgba(160, 72, 48, 0.15);
}

/* --- Smooth Scroll --- */
html {
  scroll-behavior: smooth;
}

/* ============================================
   Scroll-Reveal System
   ============================================ */

[data-animate] {
  opacity: 0;
  transition: opacity var(--anim-duration) var(--anim-easing),
              transform var(--anim-duration) var(--anim-easing);
  will-change: opacity, transform;
}

[data-animate="fade-up"] {
  transform: translateY(var(--anim-distance));
}

[data-animate="fade-in"] {
  transform: none;
}

[data-animate="slide-in-left"] {
  transform: translateX(calc(-1 * var(--anim-distance)));
}

[data-animate="slide-in-right"] {
  transform: translateX(var(--anim-distance));
}

[data-animate="scale-up"] {
  transform: scale(0.92);
}

/* Revealed state */
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* --- Staggered Children --- */
[data-stagger] > [data-animate]:nth-child(1) { transition-delay: 0s; }
[data-stagger] > [data-animate]:nth-child(2) { transition-delay: var(--anim-stagger); }
[data-stagger] > [data-animate]:nth-child(3) { transition-delay: calc(var(--anim-stagger) * 2); }
[data-stagger] > [data-animate]:nth-child(4) { transition-delay: calc(var(--anim-stagger) * 3); }
[data-stagger] > [data-animate]:nth-child(5) { transition-delay: calc(var(--anim-stagger) * 4); }
[data-stagger] > [data-animate]:nth-child(6) { transition-delay: calc(var(--anim-stagger) * 5); }
[data-stagger] > [data-animate]:nth-child(7) { transition-delay: calc(var(--anim-stagger) * 6); }
[data-stagger] > [data-animate]:nth-child(8) { transition-delay: calc(var(--anim-stagger) * 7); }
[data-stagger] > [data-animate]:nth-child(9) { transition-delay: calc(var(--anim-stagger) * 8); }
[data-stagger] > [data-animate]:nth-child(10) { transition-delay: calc(var(--anim-stagger) * 9); }

/* ============================================
   Page-Load Entrance Animations
   ============================================ */

@keyframes hero-text-up {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes navbar-down {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes hero-image-in {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes float-icon {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.anim-hero-line-1 {
  animation: hero-text-up 0.8s var(--anim-easing) 0.1s both;
}
.anim-hero-line-2 {
  animation: hero-text-up 0.8s var(--anim-easing) 0.25s both;
}
.anim-hero-line-3 {
  animation: hero-text-up 0.8s var(--anim-easing) 0.4s both;
}
.anim-hero-line-4 {
  animation: hero-text-up 0.8s var(--anim-easing) 0.55s both;
}
.anim-navbar {
  animation: navbar-down 0.6s var(--anim-easing) 0s both;
}
.anim-hero-image {
  animation: hero-image-in 1s var(--anim-easing) 0.3s both;
}
.anim-float {
  animation: float-icon 3s ease-in-out infinite;
}

/* ============================================
   Micro-Interactions
   ============================================ */

/* Button lift + shadow */
.btn-lift {
  transition: transform 0.3s var(--anim-easing),
              box-shadow 0.3s var(--anim-easing),
              background-color 0.3s ease;
}
.btn-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(160, 72, 48, 0.3);
}
.btn-lift:active {
  transform: translateY(0) scale(0.97);
  box-shadow: 0 2px 8px rgba(160, 72, 48, 0.2);
}

/* Card lift + glow */
.card-lift {
  transition: transform 0.4s var(--anim-easing),
              box-shadow 0.4s var(--anim-easing);
}
.card-lift:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1),
              0 0 0 1px var(--primary-glow);
}

/* Link underline animation */
.link-underline {
  position: relative;
  text-decoration: none;
}
.link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s var(--anim-easing);
}
.link-underline:hover::after {
  width: 100%;
}

/* Icon bounce on hover */
.icon-bounce:hover .material-symbols-outlined {
  animation: icon-bounce-kf 0.5s var(--anim-easing);
}
@keyframes icon-bounce-kf {
  0%, 100% { transform: translateY(0); }
  40%      { transform: translateY(-6px); }
  60%      { transform: translateY(-3px); }
}

/* Enhanced image zoom */
.img-zoom {
  overflow: hidden;
}
.img-zoom img {
  transition: transform 0.7s var(--anim-easing);
}
.img-zoom:hover img {
  transform: scale(1.08);
}

/* ============================================
   Special Effects
   ============================================ */

/* Shimmer on section titles */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.text-shimmer {
  background: linear-gradient(
    90deg,
    #1c1b1b 0%,
    #1c1b1b 40%,
    #A04830 50%,
    #1c1b1b 60%,
    #1c1b1b 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 4s ease-in-out infinite;
}

/* Grain texture overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
}

/* ============================================
   Lightbox Transitions
   ============================================ */

.lightbox {
  display: flex !important;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  pointer-events: none;
}
.lightbox.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.lightbox img {
  transform: scale(0.92);
  transition: transform 0.4s var(--anim-easing);
}
.lightbox.open img {
  transform: scale(1);
}

/* ============================================
   Menu Tab Transitions
   ============================================ */

.tab-content {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s var(--anim-easing),
              transform 0.35s var(--anim-easing);
}
.tab-content.active {
  opacity: 1;
  transform: translateY(0);
}

/* Tab button hover/active effects */
.tab-btn {
  transition: color 0.3s ease, border-bottom-color 0.3s ease, background-color 0.3s ease;
}
.tab-btn:hover:not(.active) {
  background-color: rgba(160, 72, 48, 0.05);
}

/* ============================================
   Accessibility: Reduced Motion
   ============================================ */

/* Reduced-motion: keep animations but make them instant/subtle */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }
}