/* =========================================================
   animations.css
   جلوه‌های حرکتی هویت بصری سایت «صنعت نوین معرق چرم»
   حرکت‌ها: ظریف، لوکس، آرام و مناسب رابط موزه/کاتالوگ
   ========================================================= */

:root {
  --motion-fast: 220ms;
  --motion-normal: 520ms;
  --motion-slow: 900ms;
  --ease-luxury: cubic-bezier(.22, 1, .36, 1);
  --ease-soft: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- ورود عمومی ---------- */

.fade-in {
  opacity: 0;
  animation: fadeIn var(--motion-slow) var(--ease-luxury) forwards;
}

.fade-up {
  opacity: 0;
  transform: translateY(35px);
  animation: fadeUp var(--motion-slow) var(--ease-luxury) forwards;
}

.fade-down {
  opacity: 0;
  transform: translateY(-28px);
  animation: fadeDown var(--motion-slow) var(--ease-luxury) forwards;
}

.fade-right {
  opacity: 0;
  transform: translateX(35px);
  animation: fadeRight var(--motion-slow) var(--ease-luxury) forwards;
}

.fade-left {
  opacity: 0;
  transform: translateX(-35px);
  animation: fadeLeft var(--motion-slow) var(--ease-luxury) forwards;
}

/* ---------- ورود مرحله‌ای ---------- */

.stagger > * {
  opacity: 0;
  transform: translateY(22px);
  animation: fadeUp var(--motion-slow) var(--ease-luxury) forwards;
}

.stagger > *:nth-child(1) { animation-delay: 80ms; }
.stagger > *:nth-child(2) { animation-delay: 160ms; }
.stagger > *:nth-child(3) { animation-delay: 240ms; }
.stagger > *:nth-child(4) { animation-delay: 320ms; }
.stagger > *:nth-child(5) { animation-delay: 400ms; }
.stagger > *:nth-child(6) { animation-delay: 480ms; }

/* ---------- Hero ---------- */

.hero-art {
  animation: heroImageIn 1.4s var(--ease-luxury) both;
  transform-origin: center;
}

.hero-overlay {
  animation: heroOverlayIn 1.1s ease-out both;
}

.hero-content,
.hero .hero-inner {
  animation: heroContentIn 1s var(--ease-luxury) 120ms both;
}

/* ---------- خطوط طلایی ---------- */

.gold-line {
  position: relative;
}

.gold-line::after {
  content: "";
  display: block;
  width: 70px;
  height: 3px;
  margin-top: 14px;
  transform-origin: right center;
  background: #b8944a;
  animation: lineGrow .85s var(--ease-luxury) both;
}

/* ---------- کارت‌ها ---------- */

.card,
.gallery-card,
.portfolio-card {
  transition:
    transform var(--motion-normal) var(--ease-luxury),
    box-shadow var(--motion-normal) ease,
    border-color var(--motion-normal) ease;
  will-change: transform;
}

.card:hover,
.gallery-card:hover,
.portfolio-card:hover {
  transform: translateY(-7px);
}

.gallery-card,
.portfolio-card {
  overflow: hidden;
}

.gallery-card img,
.portfolio-card img {
  transition:
    transform 900ms var(--ease-luxury),
    filter 600ms ease;
}

.gallery-card:hover img,
.portfolio-card:hover img {
  transform: scale(1.045);
  filter: saturate(1.05);
}

.image-hover {
  overflow: hidden;
}

.image-hover img {
  transition: transform 700ms var(--ease-luxury);
}

.image-hover:hover img {
  transform: scale(1.06);
}

/* ---------- فوکوس تصویری ---------- */

.image-focus {
  overflow: hidden;
}

.image-focus img {
  transition:
    transform 1.1s var(--ease-luxury),
    filter 800ms ease;
}

.image-focus:hover img {
  transform: scale(1.035);
  filter: contrast(1.03) saturate(1.04);
}

/* ---------- برق بسیار ظریف روی سطح چرم ---------- */

.leather-sheen {
  position: relative;
  overflow: hidden;
}

.leather-sheen::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  transform: translateX(-120%);
  background: linear-gradient(
    105deg,
    transparent 35%,
    rgba(255,255,255,.12) 50%,
    transparent 65%
  );
  transition: transform 1.1s var(--ease-luxury);
}

.leather-sheen:hover::after {
  transform: translateX(120%);
}

/* ---------- دکمه‌ها ---------- */

.btn {
  transition:
    transform var(--motion-fast) var(--ease-luxury),
    box-shadow var(--motion-normal) ease,
    background-color var(--motion-fast) ease,
    border-color var(--motion-fast) ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

/* ---------- منوی اصلی ---------- */

.main-nav a {
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -7px;
  width: 0;
  height: 2px;
  background: #b8944a;
  transition: width var(--motion-normal) var(--ease-luxury);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

/* ---------- حرکت شناور بسیار ملایم ---------- */

.float-soft {
  animation: floatSoft 4.8s ease-in-out infinite;
}

.scroll-indicator {
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ---------- Keyframes ---------- */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(35px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeRight {
  from {
    opacity: 0;
    transform: translateX(35px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeLeft {
  from {
    opacity: 0;
    transform: translateX(-35px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes heroImageIn {
  from {
    opacity: 0;
    transform: scale(1.035);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes heroOverlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes heroContentIn {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes lineGrow {
  from {
    width: 0;
    opacity: 0;
  }
  to {
    width: 70px;
    opacity: 1;
  }
}

@keyframes floatSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

@keyframes scrollPulse {
  0%, 100% {
    opacity: .45;
    transform: translateY(0);
  }
  50% {
    opacity: 1;
    transform: translateY(5px);
  }
}

/* ---------- دسترس‌پذیری ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}