/* ═══════════════════════════════════════════════════════════
   PRELOADER.CSS — SVG Morph نرم
   PRELOADER.CSS — Smooth SVG morph
   
   فهرست / Table of Contents:
   01. Preloader        — قاب اصلی
   02. Content          — محتوا
   03. Stage            — صحنه
   04. Ripple           — موج
   05. Trail            — سایه محو
   06. Shape            — شکل اصلی
   07. Morph            — انیمیشن Morph
   08. Orbit            — نقطه چرخان
   09. Center           — ARTZXEN
   10. Progress         — نوار پیشرفت
   11. Body             — قفل صفحه
   12. Responsive       — موبایل
   13. Reduced Motion   — احترام به کاربر
   ═══════════════════════════════════════════════════════════ */


/* ───────────────────────────────────────────────────────────
   01. PRELOADER — قاب اصلی
   ─────────────────────────────────────────────────────────── */

.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;

  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;

  opacity: 1;
  transform: scale(1);
  transition:
    opacity 0.8s cubic-bezier(.76, 0, .24, 1),
    transform 0.8s cubic-bezier(.76, 0, .24, 1),
    visibility 0.8s;
}

.preloader.done {
  opacity: 0;
  transform: scale(1.08);
  visibility: hidden;
  pointer-events: none;
}

.preloader.hidden {
  display: none;
}

.preloader::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;

  background: radial-gradient(
    ellipse at 50% 50%,
    rgba(255, 255, 255, 0.04) 0%,
    transparent 60%
  );

  animation: preloaderGlow 4s ease-in-out infinite;
}

@keyframes preloaderGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.08); }
}


/* ───────────────────────────────────────────────────────────
   02. CONTENT — محتوا
   ─────────────────────────────────────────────────────────── */

.preloader-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 50px;
  padding: 0 5vw;
}


/* ───────────────────────────────────────────────────────────
   03. STAGE — صحنه
   ─────────────────────────────────────────────────────────── */

.preloader-stage {
  position: relative;
  width: clamp(120px, 14vw, 180px);
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}


/* ───────────────────────────────────────────────────────────
   04. RIPPLE — موج
   ─────────────────────────────────────────────────────────── */

.preloader-ripple {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  pointer-events: none;

  animation: rippleOut 4s ease-out infinite;
}

.preloader-ripple:nth-child(2) {
  animation-delay: 2s;
}

@keyframes rippleOut {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.7;
  }
  100% {
    transform: translate(-50%, -50%) scale(2);
    opacity: 0;
  }
}


/* ───────────────────────────────────────────────────────────
   05. TRAIL — سایه محو
   ─────────────────────────────────────────────────────────── */

.preloader-trail {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  filter: blur(1.5px);
}

.preloader-trail svg {
  width: 100%;
  height: 100%;
  display: block;
}

.preloader-trail svg path {
  fill: none;
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 1.5;
  stroke-linejoin: round;
  stroke-linecap: round;

  animation: shapeMorphPath 4s ease-in-out infinite;
  animation-delay: -0.4s;
}

.preloader-trail-2 svg path {
  stroke: rgba(255, 255, 255, 0.05);
  animation-delay: -0.8s;
}


/* ───────────────────────────────────────────────────────────
   06. SHAPE — شکل اصلی
   ─────────────────────────────────────────────────────────── */

.preloader-shape {
  position: relative;
  width: 100%;
  height: 100%;
  z-index: 2;
}

.preloader-shape svg {
  width: 100%;
  height: 100%;
  display: block;
  filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.4));
}

.preloader-shape svg path {
  fill: none;
  stroke: #ffffff;
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;

  animation: shapeMorphPath 4s ease-in-out infinite;
}


/* ───────────────────────────────────────────────────────────
   07. MORPH — انیمیشن Morph (دایره → ۵ضلعی → مربع → مثلث)
   ─────────────────────────────────────────────────────────── */

@keyframes shapeMorphPath {

  /* ═══ دایره ═══ */
  0%, 15% {
    d: path("M 50 10 C 65 10 80 15 85 30 C 90 45 90 55 85 70 C 80 85 65 90 50 90 C 35 90 20 85 15 70 C 10 55 10 45 15 30 C 20 15 35 10 50 10 Z");
  }

  /* ═══ ۵ ضلعی ═══ */
  30%, 45% {
    d: path("M 50 10 C 65 10 80 15 85 30 C 92 50 90 55 85 70 C 75 85 65 90 50 90 C 35 90 20 85 15 70 C 8 50 10 45 15 30 C 20 15 35 10 50 10 Z");
  }

  /* ═══ مربع ═══ */
  55%, 70% {
    d: path("M 50 10 C 60 10 80 10 85 10 C 88 15 90 30 90 50 C 90 60 90 80 90 90 C 80 90 60 90 50 90 C 40 90 20 90 10 90 C 10 80 10 60 10 50 C 10 40 10 20 10 10 C 20 10 40 10 50 10 Z");
  }

  /* ═══ مثلث ═══ */
  80%, 95% {
    d: path("M 50 10 C 55 10 60 15 65 25 C 75 45 85 70 90 85 C 85 90 75 90 50 90 C 25 90 15 90 10 85 C 15 70 25 45 35 25 C 40 15 45 10 50 10 Z");
  }

  /* ═══ برگشت به دایره ═══ */
  100% {
    d: path("M 50 10 C 65 10 80 15 85 30 C 90 45 90 55 85 70 C 80 85 65 90 50 90 C 35 90 20 85 15 70 C 10 55 10 45 15 30 C 20 15 35 10 50 10 Z");
  }
}


/* ───────────────────────────────────────────────────────────
   08. ORBIT — نقطه چرخان
   ─────────────────────────────────────────────────────────── */

.preloader-orbit {
  position: absolute;
  inset: -10px;
  width: calc(100% + 20px);
  height: calc(100% + 20px);
  pointer-events: none;
  z-index: 3;

  animation: orbitRotate 4s linear infinite;
}

@keyframes orbitRotate {
  to { transform: rotate(360deg); }
}

.preloader-orbit::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);

  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ffffff;

  box-shadow:
    0 0 8px #ffffff,
    0 0 16px rgba(255, 255, 255, 0.6),
    0 0 24px rgba(255, 255, 255, 0.3);
}


/* ───────────────────────────────────────────────────────────
   09. CENTER — ARTZXEN
   ─────────────────────────────────────────────────────────── */

.preloader-center {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.preloader-brand {
  display: flex;
  gap: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 48px);
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 1;
  color: #ffffff;
  direction: ltr;

  text-shadow:
    0 0 30px rgba(255, 255, 255, 0.3),
    0 0 60px rgba(255, 255, 255, 0.15);
}

.preloader-letter {
  display: inline-block;
  opacity: 0;
  transform: translateY(110%) rotateX(-90deg);
  transform-origin: center bottom;
  transition:
    opacity 0.6s cubic-bezier(.2, .8, .2, 1),
    transform 0.8s cubic-bezier(.2, .8, .2, 1);
  will-change: transform, opacity;
}

.preloader.reveal .preloader-letter {
  opacity: 1;
  transform: translateY(0) rotateX(0);
}

.preloader.reveal .preloader-letter:nth-child(1) { transition-delay: 0.05s; }
.preloader.reveal .preloader-letter:nth-child(2) { transition-delay: 0.10s; }
.preloader.reveal .preloader-letter:nth-child(3) { transition-delay: 0.15s; }
.preloader.reveal .preloader-letter:nth-child(4) { transition-delay: 0.20s; }
.preloader.reveal .preloader-letter:nth-child(5) { transition-delay: 0.25s; }
.preloader.reveal .preloader-letter:nth-child(6) { transition-delay: 0.30s; }
.preloader.reveal .preloader-letter:nth-child(7) { transition-delay: 0.35s; }

.preloader-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  opacity: 0;
  transition: opacity 0.6s ease 0.5s;
}

.preloader.reveal .preloader-sub {
  opacity: 1;
}


/* ───────────────────────────────────────────────────────────
   10. PROGRESS — نوار پیشرفت
   ─────────────────────────────────────────────────────────── */

.preloader-progress-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: clamp(180px, 24vw, 300px);
}

.preloader-progress {
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.15);
  position: relative;
  overflow: hidden;
  border-radius: 100px;
}

.preloader-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: #ffffff;
  box-shadow:
    0 0 12px rgba(255, 255, 255, 0.6),
    0 0 24px rgba(255, 255, 255, 0.3);
  transition: width 0.1s linear;
  border-radius: 100px;
}

.preloader-counter {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: #ffffff;
  direction: ltr;
  opacity: 0;
  transition: opacity 0.6s ease 0.4s;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.preloader.reveal .preloader-counter {
  opacity: 1;
}


/* ───────────────────────────────────────────────────────────
   11. BODY — قفل صفحه
   ─────────────────────────────────────────────────────────── */

body.loading {
  overflow: hidden;
}


/* ───────────────────────────────────────────────────────────
   12. RESPONSIVE — موبایل
   ─────────────────────────────────────────────────────────── */

@media (max-width: 900px) {

  .preloader-stage {
    width: clamp(90px, 22vw, 130px);
  }

  .preloader-shape svg path {
    stroke-width: 1.5;
  }

  .preloader-brand {
    font-size: clamp(20px, 6vw, 36px);
  }

  .preloader-progress-wrap {
    width: clamp(160px, 60vw, 240px);
  }

  .preloader-orbit::before {
    width: 5px;
    height: 5px;
  }
}


/* ───────────────────────────────────────────────────────────
   13. REDUCED MOTION — احترام به کاربر
   ─────────────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .preloader-shape svg path,
  .preloader-trail svg path,
  .preloader-ripple,
  .preloader-orbit,
  .preloader::before {
    animation: none !important;
  }

  .preloader-ripple,
  .preloader-trail {
    display: none;
  }

  .preloader-letter {
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .preloader-counter,
  .preloader-sub {
    opacity: 1 !important;
  }
}