/*
===========================================
プリローダー / スプラッシュスクリーン
MASUTO.inc Corporate Theme
===========================================
*/

/* ============================================
   全体: スクロール抑制（ローダー表示中）
   ============================================ */
body.is-loading {
  overflow: hidden;
}

/* ============================================
   ローダー本体
   ============================================ */
#site-preloader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #0e2238 0%, #1A3A5A 45%, #1e4d6b 100%);
  overflow: hidden;

  /* 退場アニメーション用 */
  transition: transform 0.75s cubic-bezier(0.76, 0, 0.24, 1);
  transform: translateY(0);
  will-change: transform;
}

/* 退場: 上へスライドアウト */
#site-preloader.preloader-exit {
  transform: translateY(-100%);
}

/* ローダー非表示後は DOM から除外 */
#site-preloader.preloader-done {
  display: none;
}

/* ============================================
   背景パーティクル（CSS のみ）
   ============================================ */
.preloader-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.preloader-particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(78, 205, 196, 0.18);
  animation: plFloat var(--dur, 14s) ease-in-out infinite;
  animation-delay: var(--dly, 0s);
}

@keyframes plFloat {
  0%   { transform: translateY(0) scale(1);      opacity: 0;   }
  15%  { opacity: 0.8; }
  50%  { transform: translateY(var(--ty, -140px)) scale(1.2); opacity: 0.5; }
  85%  { opacity: 0.3; }
  100% { transform: translateY(calc(var(--ty, -140px) * 2)) scale(0.8); opacity: 0; }
}

/* ============================================
   背景グリッド線（サイバー感）
   ============================================ */
.preloader-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(78, 205, 196, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78, 205, 196, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridFade 3s ease-in-out infinite alternate;
}

@keyframes gridFade {
  from { opacity: 0.4; }
  to   { opacity: 1;   }
}

/* ============================================
   コンテンツラッパー
   ============================================ */
.preloader-content {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
}

/* ============================================
   アニメアイコン（回転リング）
   ============================================ */
.preloader-icon {
  position: relative;
  width: 90px;
  height: 90px;
  margin-bottom: 0.5rem;
}

/* 外リング */
.preloader-ring-outer {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(78, 205, 196, 0.2);
  border-top-color: #4ECDC4;
  animation: spinRing 1.4s linear infinite;
}

/* 内リング（逆回転） */
.preloader-ring-inner {
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 107, 107, 0.2);
  border-bottom-color: #FF6B6B;
  animation: spinRing 1.0s linear infinite reverse;
}

/* 中央ドット */
.preloader-dot {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preloader-dot::after {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #4ECDC4;
  box-shadow: 0 0 12px rgba(78, 205, 196, 0.8);
  animation: dotPulse 1.4s ease-in-out infinite;
}

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

@keyframes dotPulse {
  0%, 100% { transform: scale(1);    opacity: 1;   }
  50%       { transform: scale(1.5); opacity: 0.6; }
}

/* ============================================
   ロゴ / サイト名
   ============================================ */
.preloader-logo {
  animation: logoReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

.preloader-logo img {
  max-height: 52px;
  width: auto;
  filter: brightness(0) invert(1); /* ロゴを白抜き */
}

.preloader-site-name {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1;
  animation: logoReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

/* サイト名の中の強調部分 */
.preloader-site-name .highlight {
  color: #4ECDC4;
}

@keyframes logoReveal {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0)     scale(1);    }
}

/* ============================================
   スローガン
   ============================================ */
.preloader-tagline {
  font-size: clamp(0.75rem, 2vw, 0.9rem);
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 300;
  animation: taglineReveal 0.8s ease 0.7s both;
}

@keyframes taglineReveal {
  from { opacity: 0; letter-spacing: 0.4em; }
  to   { opacity: 1; letter-spacing: 0.22em; }
}

/* ============================================
   進捗エリア
   ============================================ */
.preloader-progress-area {
  width: min(320px, 80vw);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  animation: fadeInUp 0.6s ease 0.5s both;
}

/* 数字カウンター */
.preloader-counter {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 30px rgba(78, 205, 196, 0.4);
  transition: text-shadow 0.3s ease;
}

.preloader-counter .unit {
  font-size: 0.45em;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.6);
  margin-left: 2px;
}

/* バー外枠 */
.preloader-bar-track {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  overflow: hidden;
}

/* バー本体 */
.preloader-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4ECDC4, #2ec4b6, #FF6B6B);
  background-size: 200% 100%;
  border-radius: 2px;
  transition: width 0.25s ease-out;
  animation: barShimmer 2s linear infinite;
  box-shadow: 0 0 8px rgba(78, 205, 196, 0.6);
}

@keyframes barShimmer {
  0%   { background-position: 0%   50%; }
  100% { background-position: 200% 50%; }
}

/* ステータステキスト */
.preloader-status {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  height: 1em;
  transition: opacity 0.3s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0);     }
}

/* ============================================
   アクセシビリティ: reduced-motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  #site-preloader {
    transition-duration: 0.15s;
  }
  .preloader-ring-outer,
  .preloader-ring-inner,
  .preloader-dot::after,
  .preloader-particle,
  .preloader-grid,
  .preloader-bar-fill {
    animation: none;
  }
  .preloader-bar-fill {
    background: #4ECDC4;
  }
}