/* ============================================================
   dark-dream.css —— 紫色暗色梦幻主题（入口闸门 + 六页故事）
   遗憾唯美风格 · 仅作用于 #entry-gate 和 #story-section
   ============================================================ */

:root {
  --dream-bg-1: #1a0b2e;
  --dream-bg-2: #2d1b4e;
  --dream-bg-3: #3d2466;
  --dream-purple: #a855f7;
  --dream-purple-light: #c084fc;
  --dream-pink: #f0abfc;
  --dream-blue: #818cf8;
  --dream-gold: #fbbf24;
  --dream-text: #f5f3ff;
  --dream-text-soft: #c4b5fd;
  --dream-glow: rgba(168, 85, 247, 0.4);
}

/* ---------- 入口闸门 ---------- */
#entry-gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, var(--dream-bg-3) 0%, var(--dream-bg-2) 40%, var(--dream-bg-1) 100%);
  overflow: hidden;
  transition: opacity 1.2s ease, transform 1.2s ease;
}
#entry-gate.gate-hidden {
  opacity: 0;
  transform: scale(1.1);
  pointer-events: none;
}

/* 闸门背景粒子 */
.gate-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.gate-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--dream-purple-light);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--dream-glow);
  animation: gate-float linear infinite;
  opacity: 0.6;
}
@keyframes gate-float {
  0%   { transform: translateY(100vh) translateX(0); opacity: 0; }
  10%  { opacity: 0.8; }
  90%  { opacity: 0.8; }
  100% { transform: translateY(-10vh) translateX(30px); opacity: 0; }
}

/* 闸门标题 */
.gate-title {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--dream-text);
  text-align: center;
  letter-spacing: 8px;
  margin-bottom: 12px;
  text-shadow: 0 0 30px var(--dream-glow);
  animation: gate-fade-in 2s ease-out;
}
.gate-subtitle {
  font-family: 'ZCOOL XiaoWei', serif;
  font-size: clamp(0.9rem, 2vw, 1.2rem);
  color: var(--dream-text-soft);
  letter-spacing: 4px;
  margin-bottom: 40px;
  animation: gate-fade-in 2s ease-out 0.5s both;
}
@keyframes gate-fade-in {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 闸门倒计时 */
.gate-countdown {
  display: flex;
  gap: clamp(12px, 3vw, 24px);
  margin-bottom: 40px;
  animation: gate-fade-in 2s ease-out 1s both;
}
.gate-countdown-item {
  text-align: center;
  min-width: clamp(60px, 12vw, 90px);
}
.gate-countdown-num {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--dream-pink);
  text-shadow: 0 0 20px var(--dream-glow);
}
.gate-countdown-label {
  font-size: clamp(0.7rem, 1.5vw, 0.9rem);
  color: var(--dream-text-soft);
  letter-spacing: 2px;
  margin-top: 4px;
}

/* 进入按钮 */
.gate-enter-btn {
  font-family: 'ZCOOL XiaoWei', serif;
  font-size: clamp(1rem, 2vw, 1.3rem);
  letter-spacing: 6px;
  padding: 14px 48px;
  border: 2px solid var(--dream-purple-light);
  border-radius: 50px;
  background: rgba(168, 85, 247, 0.15);
  color: var(--dream-text);
  cursor: pointer;
  transition: all 0.4s ease;
  backdrop-filter: blur(10px);
  animation: gate-fade-in 2s ease-out 1.5s both, gate-pulse 2.5s ease-in-out infinite;
  position: relative;
  overflow: hidden;
}
.gate-enter-btn:hover {
  background: rgba(168, 85, 247, 0.35);
  box-shadow: 0 0 30px var(--dream-glow), inset 0 0 20px rgba(168, 85, 247, 0.2);
  transform: translateY(-2px);
}
.gate-enter-btn:active { transform: translateY(0); }
@keyframes gate-pulse {
  0%, 100% { box-shadow: 0 0 15px var(--dream-glow); }
  50%      { box-shadow: 0 0 35px var(--dream-glow); }
}

/* ---------- 六页故事区域 ---------- */
#story-section {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: none;
  overflow: hidden;
}
#story-section.story-active {
  display: block;
}

.story-page {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease;
}
.story-page.page-active {
  opacity: 1;
  visibility: visible;
}

/* 每页渐变背景（使用data-page属性选择器，避免nth-child偏移问题） */
.story-page[data-page="1"] {
  background: radial-gradient(ellipse at 30% 50%, #3d2466 0%, #2d1b4e 50%, #1a0b2e 100%);
}
.story-page[data-page="2"] {
  background: radial-gradient(ellipse at 70% 50%, #4a1d6e 0%, #2d1b4e 50%, #1a0b2e 100%);
}
.story-page[data-page="3"] {
  background: radial-gradient(ellipse at 50% 30%, #3d2466 0%, #2a1548 50%, #150a28 100%);
}
.story-page[data-page="4"] {
  background: radial-gradient(ellipse at 20% 70%, #4a1d6e 0%, #2d1b4e 50%, #1a0b2e 100%);
}
.story-page[data-page="5"] {
  background: radial-gradient(ellipse at 80% 60%, #3d2466 0%, #2a1548 50%, #150a28 100%);
}
.story-page[data-page="6"] {
  background: radial-gradient(ellipse at 50% 80%, #4a1d6e 0%, #2d1b4e 50%, #1a0b2e 100%);
}
.story-page[data-page="7"] {
  background: radial-gradient(ellipse at center, #4a1d6e 0%, #2d1b4e 40%, #1a0b2e 100%);
}
.story-page[data-page="8"] {
  background: radial-gradient(ellipse at center, #5b21b6 0%, #2d1b4e 50%, #1a0b2e 100%);
}

/* 故事页粒子层 */
.story-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.story-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--dream-purple-light);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--dream-glow);
  animation: story-drift linear infinite;
  opacity: 0.4;
}
@keyframes story-drift {
  0%   { transform: translate(0, 100vh) scale(0); opacity: 0; }
  15%  { opacity: 0.6; transform: scale(1); }
  85%  { opacity: 0.6; }
  100% { transform: translate(var(--drift-x, 50px), -10vh) scale(0.5); opacity: 0; }
}

/* 故事页内容 */
.story-content {
  max-width: 800px;
  text-align: center;
  position: relative;
  z-index: 2;
}

/* 页码装饰 */
.story-page-num {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 900;
  color: rgba(168, 85, 247, 0.12);
  line-height: 1;
  margin-bottom: 10px;
}

/* 引子页特殊样式 */
.story-prologue .story-text {
  font-size: clamp(1.3rem, 3.5vw, 2rem);
  line-height: 2;
  color: var(--dream-text);
}

/* 对话页样式 */
.story-dialogue .story-label {
  font-family: 'ZCOOL XiaoWei', serif;
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--dream-purple-light);
  letter-spacing: 4px;
  margin-bottom: 20px;
  opacity: 0;
}
.story-dialogue .story-text {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.8;
  color: var(--dream-text);
  text-shadow: 0 0 25px var(--dream-glow);
}
.story-dialogue .story-age {
  font-family: 'ZCOOL XiaoWei', serif;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  color: var(--dream-pink);
  letter-spacing: 6px;
  margin: 10px 0;
  display: block;
}

/* 文字逐句浮现动画 */
.text-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s ease, transform 1s ease;
}
.page-active .text-reveal {
  opacity: 1;
  transform: translateY(0);
  transition-duration: 0.6s;
}
.page-active .text-reveal.delay-1 { transition-delay: 0.2s; }
.page-active .text-reveal.delay-2 { transition-delay: 0.5s; }
.page-active .text-reveal.delay-3 { transition-delay: 0.8s; }

/* 故事页导航提示 */
.story-nav-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.85rem;
  color: var(--dream-text-soft);
  letter-spacing: 3px;
  opacity: 0.6;
  animation: nav-bounce 2s ease-in-out infinite;
  z-index: 3;
}
@keyframes nav-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(8px); }
}

/* 故事页进度条 */
.story-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--dream-purple), var(--dream-pink));
  box-shadow: 0 0 10px var(--dream-glow);
  transition: width 0.6s ease;
  z-index: 3;
}

/* 跳过按钮 */
.story-skip {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 4;
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.3);
  color: var(--dream-text-soft);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  letter-spacing: 2px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}
.story-skip:hover {
  background: rgba(168, 85, 247, 0.3);
  color: var(--dream-text);
}

/* ---------- 生日页面（故事结束后显示） ---------- */
#birthday-page {
  opacity: 0;
  transition: opacity 1.5s ease;
}
#birthday-page.birthday-visible {
  opacity: 1;
}

/* 暗色主题下隐藏亮色装饰 */
body.story-mode .bg-decor,
body.story-mode .music-player,
body.story-mode .sulong-deco {
  display: none;
}

/* 响应式 */
@media (max-width: 768px) {
  .gate-title { letter-spacing: 4px; }
  .story-prologue .story-text { line-height: 1.8; }
  .story-dialogue .story-text { line-height: 1.6; }
  .story-page-num { font-size: 3.5rem; }
}