/* style.css - 完整修复版 */

/* --- 1. CSS 变量定义 --- */
:root {
  --bg-color: #f2f4f6;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --header-bg: rgba(242, 244, 246, 0.8);
  --intro-bg: rgba(242, 244, 246, 0.6); 
  --card-bg: #ffffff;
  --overlay-backdrop: rgba(255, 255, 255, 0.95);
  --modal-bg: #ffffff;
  --btn-border: #d2d2d7;
  --global-tilt: 0deg; 
  
  /* 动画默认参数 */
  --float-duration: 10s; --float-delay: 0s;
  --rock-duration: 6s; --rock-delay: 0s;
  --breath-duration: 8s; --breath-delay: 0s; --breath-scale: 1.03;
  
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="dark"] {
  --bg-color: #050505;
  --text-primary: #f5f5f7;
  --text-secondary: #86868b;
  --header-bg: rgba(5, 5, 5, 0.7);
  --intro-bg: rgba(5, 5, 5, 0.6);
  --card-bg: #1c1c1e;
  --modal-bg: #1c1c1e;
  --overlay-backdrop: rgba(0, 0, 0, 0.8);
  --btn-border: #424245;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-main);
  overflow: hidden; 
  height: 100vh; width: 100vw;
  user-select: none;
  transition: background-color 0.5s ease;
}

/* --- Header 导航栏 --- */
header {
  position: fixed; top: 0; left: 0; width: 100%; height: 60px;
  padding: 0 20px 5px 20px; 
  display: flex; justify-content: space-between; align-items: center;
  z-index: 1000;
  
  background-color: var(--header-bg);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: none;
  
  opacity: 0; pointer-events: none; transition: opacity 1s ease 0.5s; 
  
  /* 边缘羽化 */
  -webkit-mask-image: linear-gradient(to bottom, black 92%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 92%, transparent 100%);
}
header.visible { opacity: 1; pointer-events: auto; }

.title-group h1 { font-size: 1.1rem; font-weight: 600; letter-spacing: -0.5px; }
.controls { display: flex; align-items: center; }
.controls .btn { 
  background: none; border: 1px solid var(--btn-border); color: var(--text-primary); 
  padding: 4px 12px; cursor: pointer; border-radius: 99px; font-size: 0.75rem; 
  margin-left: 8px; transition: all 0.2s; min-width: 32px; display: flex; justify-content: center; align-items: center;
}
.controls .btn:hover { background: var(--text-primary); color: var(--bg-color); border-color: transparent; }

/* --- 歌曲显示区域 --- */
.song-container {
  display: none;
  height: 24px; overflow: hidden; margin-right: 8px; font-size: 0.75rem;
  color: var(--text-primary); font-family: var(--font-main); opacity: 0.8; position: relative;
}
@media (min-width: 400px) { .song-container { display: flex; align-items: center; justify-content: center; } }
.song-container.mask-active {
  mask-image: linear-gradient(to right, transparent 0%, black 15%, black 85%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 15%, black 85%, transparent 100%);
  padding-left: 20px; padding-right: 20px; box-sizing: border-box; 
}
.scroll-wrapper { display: inline-flex; white-space: nowrap; align-items: center; will-change: transform; flex-shrink: 0; }
.scroll-wrapper.scrolling { animation: scroll-left 10s linear infinite; }
.song-text-item { white-space: nowrap; padding-right: 40px; flex-shrink: 0; }
@keyframes scroll-left { 0%, 15% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* --- 滚动容器 --- */
#scroll-container {
  width: 100vw; height: 100vh; overflow-y: auto; overflow-x: hidden;
  padding-top: 60px; 
  padding-bottom: 100px; 
  padding-left: 10px;
  padding-right: 10px;
  
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
  filter: blur(12px) grayscale(20%); transition: filter 1.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  scroll-behavior: smooth; 
}
#scroll-container.focused { filter: blur(0) grayscale(0%); }
#scroll-container::-webkit-scrollbar { display: none; }

#cloud-stage { position: relative; width: 100%; }

/* --- 记忆碎片 --- */
.memory-fragment { 
  position: absolute; z-index: 10; will-change: transform;
}
.memory-fragment:hover { 
  z-index: 1000 !important; filter: brightness(1.05) scale(1.05) !important; animation-play-state: paused; 
}

.fragment-floater { width: 100%; height: 100%; animation: var(--float-name, float-A) var(--float-duration) ease-in-out infinite alternate; animation-delay: var(--float-delay); will-change: transform; }
.fragment-rocker { width: 100%; height: 100%; animation: var(--rock-name, rock-A) var(--rock-duration) ease-in-out infinite alternate; animation-delay: var(--rock-delay); will-change: transform; }
.fragment-scaler { width: 100%; height: 100%; animation: breathing var(--breath-duration) ease-in-out infinite alternate; animation-delay: var(--breath-delay); will-change: transform; transform-origin: center center; }

.memory-fragment:hover .fragment-floater, 
.memory-fragment:hover .fragment-rocker,
.memory-fragment:hover .fragment-scaler { animation-play-state: paused; }

@keyframes float-A { 0% { transform: translate(0, 0); } 100% { transform: translate(-20px, -8px); } }
@keyframes float-B { 0% { transform: translate(0, 0); } 100% { transform: translate(18px, -5px); } }
@keyframes float-C { 0% { transform: translate(-5px, 5px); } 100% { transform: translate(15px, -15px); } }
@keyframes float-D { 0% { transform: translate(0,0); } 50% { transform: translate(10px, -10px); } 100% { transform: translate(0,0); } }

@keyframes rock-A { 0% { transform: rotate(-2deg); } 100% { transform: rotate(2deg); } }
@keyframes rock-B { 0% { transform: rotate(-2.5deg); } 100% { transform: rotate(1deg); } }
@keyframes rock-C { 0% { transform: rotate(-1deg); } 100% { transform: rotate(2.5deg); } }

@keyframes breathing { 0% { transform: scale(1); } 100% { transform: scale(var(--breath-scale)); } }


/* --- 卡片内容 --- */
.fragment-content {
  background: var(--card-bg); padding: 5px; border-radius: 4px; box-shadow: 0 2px 10px rgba(0,0,0,0.08); cursor: pointer;
  transform: rotate(var(--base-rotation)) rotateX(var(--global-tilt)); 
  transition: transform 0.3s cubic-bezier(0.2, 0, 0.2, 1), box-shadow 0.3s; 
}
.memory-fragment:hover .fragment-content { 
  transform: scale(1.05) rotate(0deg) !important; box-shadow: 0 20px 40px rgba(0,0,0,0.15); 
}
.fragment-content img { width: 100%; height: auto; display: block; border-radius: 2px; filter: grayscale(10%); pointer-events: none; }

/* --- 弹窗组件 --- */
#lightbox-overlay, #about-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 9999;
  background-color: var(--overlay-backdrop); opacity: 0; pointer-events: none; transition: opacity 0.3s ease; display: flex; justify-content: center; align-items: center;
}
#lightbox-overlay.is-visible, #about-overlay.is-visible { opacity: 1; pointer-events: auto; }
#about-overlay { background-color: rgba(0,0,0,0.4); backdrop-filter: blur(8px); z-index: 9998; }

.lightbox-card {
  background: var(--card-bg); 
  width: auto; max-width: 90vw; max-height: 85vh; 
  border-radius: 12px; box-shadow: 0 40px 90px rgba(0,0,0,0.25);
  display: flex; flex-direction: column; align-items: center; 
  overflow: hidden; 
  
  /* [新增] 必须加这个，让内部的绝对定位按钮相对于卡片定位 */
  position: relative; 
  
  transform: scale(0.95) translateY(20px); transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.lightbox-close-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  
  /* 1. 使用页面通用的变量，实现明暗切换适配 */
  background-color: var(--header-bg);  /* 随主题变化的磨砂背景 */
  color: var(--text-primary);          /* 随主题变化的文字颜色 */
  border: 1px solid var(--btn-border); /* 加上边框，防止在相似颜色的图片上隐身 */
  
  /* 2. 磨砂玻璃效果 */
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1); /* 加上阴影，增加层次感 */
  
  font-size: 1.2rem;
  line-height: 1;
  padding: 0;
  
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  z-index: 20; 
  transition: all 0.2s ease;
}

/* Hover 效果：反转颜色 (与 Header 按钮一致) */
.lightbox-close-btn:hover {
  background-color: var(--text-primary); /* 背景变黑/白 */
  color: var(--bg-color);                /* 文字变白/黑 */
  border-color: transparent;
  transform: scale(1.1);
  box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

#lightbox-overlay.is-visible .lightbox-card { transform: scale(1) translateY(0); }
.lightbox-card img { width: auto; max-width: 100%; max-height: 65vh; object-fit: contain; display: block; }

.lightbox-info { padding: 24px; overflow-y: auto; width: 100%; min-width: 280px; box-sizing: border-box; }
.lightbox-date { font-size: 0.85rem; opacity: 0.5; display: block; margin-bottom: 4px; font-weight: 500; }
.lightbox-location { display: flex; align-items: center; gap: 4px; font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 4px; font-weight: 500; }
.lightbox-desc { font-size: 1.1rem; line-height: 1.5; font-weight: 400; margin-top: 8px;}

.about-card {
  background: var(--modal-bg); width: 90%; max-width: 420px; padding: 40px; border-radius: 16px; 
  box-shadow: 0 25px 60px rgba(0,0,0,0.2); text-align: center;
  transform: translateY(20px); transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1); position: relative;
}
#about-overlay.is-visible .about-card { transform: translateY(0); }
.about-card h2 { font-size: 1.8rem; margin-bottom: 15px; font-weight: 700; }
.about-card p { color: var(--text-secondary); line-height: 1.6; font-size: 1rem; margin-bottom: 30px; }
.about-close-btn {
  position: absolute; top: 15px; right: 20px; background: none; border: none; font-size: 1.8rem; color: var(--text-secondary); 
  cursor: pointer; line-height: 1; padding: 0; transition: color 0.2s, transform 0.2s;
}
.about-close-btn:hover { color: var(--text-primary); transform: scale(1.1); }
.about-footer { font-size: 0.8rem; color: var(--text-secondary); opacity: 0.6; margin-top: 20px; border-top: 1px solid var(--btn-border); padding-top: 15px;}

/* --- Intro --- */
#intro-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 20000; 
  background-color: var(--intro-bg); backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.8s;
}
#intro-overlay.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.intro-controls { position: absolute; top: 20px; right: 20px; display: flex; gap: 10px; }
.intro-controls .btn {
  background: rgba(125, 125, 125, 0.1); border: 1px solid var(--btn-border); color: var(--text-primary); 
  padding: 6px 14px; cursor: pointer; border-radius: 99px; font-size: 0.8rem; 
  transition: all 0.2s; backdrop-filter: blur(4px);
}
.intro-controls .btn:hover { background: var(--text-primary); color: var(--bg-color); border-color: transparent; }
.intro-content { text-align: center; opacity: 0; transform: translateY(20px); animation: introFadeUp 1s ease 0.2s forwards; }
.intro-title {
  font-size: 2.5rem; font-weight: 700; margin-bottom: 10px; letter-spacing: -1px;
  background: linear-gradient(45deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  text-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
.intro-subtitle { font-size: 1rem; color: var(--text-secondary); margin-bottom: 40px; font-weight: 400; }
.start-btn {
  background: var(--text-primary); color: var(--bg-color); border: none; padding: 14px 36px; border-radius: 50px;
  font-size: 1rem; font-weight: 600; cursor: pointer; box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  transition: transform 0.2s, box-shadow 0.2s;
}
.start-btn:hover { transform: scale(1.05); box-shadow: 0 15px 40px rgba(0,0,0,0.2); }
.start-btn:active { transform: scale(0.98); }
@keyframes introFadeUp { to { opacity: 1; transform: translateY(0); } }

/* --- Footer --- */
footer { 
  position: fixed; bottom: 0; left: 0; width: 100%; 
  background-color: var(--header-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-top: none;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 10px 0 10px 0; 
  gap: 4px; z-index: 1000;
  opacity: 0; transition: opacity 1s ease 0.5s; 
  mask-image: linear-gradient(to top, black 92%, transparent 100%);
  -webkit-mask-image: linear-gradient(to top, black 92%, transparent 100%);
}
footer.visible { opacity: 1; }
.footer-hint { font-size: 0.85rem; color: var(--text-primary); font-weight: 500; opacity: 0.8; letter-spacing: 0.5px; }
.footer-copyright { font-size: 0.75rem; color: var(--text-secondary); opacity: 0.7; font-family: var(--font-main); }
.footer-copyright a { color: inherit; text-decoration: none; border-bottom: 1px solid transparent; transition: all 0.2s; }
.footer-copyright a:hover { color: var(--text-primary); border-bottom-color: var(--text-primary); opacity: 1; }

/* --- 日期侧边栏 --- */
#date-sidebar {
  position: fixed; right: 20px; top: 50%; transform: translateY(-50%);
  z-index: 900; opacity: 0; transition: opacity 1s ease 1s; pointer-events: none;
  display: flex; flex-direction: column; align-items: center;
}
#date-sidebar.visible { opacity: 1; pointer-events: auto; }
#sidebar-label { font-size: 0.7rem; margin-bottom: 8px; text-align: center; font-weight: 600; opacity: 0.9; color: #ffffff; text-shadow: 0 1px 3px rgba(0,0,0,0.5); letter-spacing: 0.5px; }
#date-sidebar ul {
  list-style: none; display: flex; flex-direction: column; gap: 0; padding: 10px 6px;
  background: rgba(0, 0, 0, 0.2); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-radius: 20px; border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease; box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
#date-sidebar li {
  font-size: 0.75rem; color: rgba(255, 255, 255, 0.7); text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  cursor: pointer; text-align: center; font-family: var(--font-main); 
  transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  width: 30px; height: 30px; line-height: 30px; margin: 6px 0; border-radius: 50%;
  opacity: 1; overflow: hidden;
}
#date-sidebar li.hidden-month { height: 0; margin: 0; opacity: 0; transform: scale(0); }
#date-sidebar li:hover { color: #ffffff; background: rgba(255, 255, 255, 0.2); }
#date-sidebar li.active { background: rgba(255, 255, 255, 0.9); color: #000000; text-shadow: none; font-weight: bold; transform: scale(1.1); box-shadow: 0 4px 10px rgba(0,0,0,0.3); opacity: 1; }

[data-theme="light"] #date-sidebar ul { background: rgba(255, 255, 255, 0.4); border-color: rgba(0, 0, 0, 0.1); box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
[data-theme="light"] #sidebar-label { color: #1d1d1f; text-shadow: none; }
[data-theme="light"] #date-sidebar li { color: rgba(0, 0, 0, 0.5); text-shadow: none; }
[data-theme="light"] #date-sidebar li:hover { color: #000000; background: rgba(0, 0, 0, 0.05); }
[data-theme="light"] #date-sidebar li.active { background: #1d1d1f; color: #ffffff; box-shadow: 0 4px 10px rgba(0,0,0,0.15); }

/* [新增] 默认隐藏气泡 (桌面端不显示) */
#sidebar-bubble {
  display: none;
}

/* --- 移动端侧边栏 (< 600px) --- */
@media (max-width: 600px) {
  .lightbox-close-btn {
    top: 10px;
    right: 10px;
    width: 36px; 
    height: 36px;
  }
  
  #date-sidebar {
    display: flex !important; right: 10px; top: 55%; height: auto; width: auto; 
    opacity: 1 !important; pointer-events: auto !important; mix-blend-mode: normal; z-index: 2000;
  }
  #sidebar-label { display: none; }
  #date-sidebar ul {
    background: rgba(0, 0, 0, 0.25); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15); border-radius: 12px; 
    padding: 8px 4px; gap: 2px; width: 28px; box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: all 0.2s ease;
  }
  [data-theme="light"] #date-sidebar ul { background: rgba(255, 255, 255, 0.45); border-color: rgba(0, 0, 0, 0.05); }

  #date-sidebar li {
    width: 20px; height: 20px; line-height: 20px; border-radius: 50%; margin: 2px auto; 
    font-size: 0.6rem; font-weight: 500; color: rgba(255, 255, 255, 0.85); text-shadow: 0 1px 2px rgba(0,0,0,0.5);
    background-color: transparent; transition: all 0.2s;
  }
  [data-theme="light"] #date-sidebar li { color: rgba(0, 0, 0, 0.6); text-shadow: none; }
  
  #date-sidebar li.hidden-month { height: 0; margin: 0; opacity: 0; transform: scale(0); }

  #date-sidebar li.active {
    background-color: rgba(255, 255, 255, 0.95); color: #000; text-shadow: none; transform: scale(1.1); box-shadow: 0 2px 6px rgba(0,0,0,0.2); font-weight: 700;
  }
  [data-theme="light"] #date-sidebar li.active { background-color: #1d1d1f; color: #fff; box-shadow: 0 2px 6px rgba(0,0,0,0.2); }

  #sidebar-bubble {
    position: absolute; right: 40px; top: 0; width: 45px; height: 45px; 
    background: rgba(255, 255, 255, 0.95); border-radius: 50% 0 50% 50%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    display: flex !important; justify-content: center; align-items: center;
    font-size: 1.1rem; font-weight: 800; font-family: var(--font-main); color: #000;
    opacity: 0; transform: scale(0.5); pointer-events: none; transition: opacity 0.15s, transform 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 2000;
  }
  [data-theme="dark"] #sidebar-bubble { background: rgba(30, 30, 30, 0.95); color: #fff; border: 1px solid rgba(255,255,255,0.1); }
  #sidebar-bubble.is-dragging { opacity: 1; transform: scale(1); }
}

/* --- 响应式折叠菜单 --- */
.mobile-only { display: none !important; }
#mobile-menu-dropdown { display: none; }

@media (max-width: 768px) {
  /* 隐藏桌面端按钮 */
  .desktop-only { display: none !important; }
  
  /* 显示移动端菜单按钮 */
  .mobile-only { display: flex !important;}

  /* 下拉菜单容器样式 */
  #mobile-menu-dropdown {
    display: flex; 
    flex-direction: column;
    position: fixed; 
    top: 65px; 
    
    /* [修改] 靠右距离稍微减小，更贴边 */
    right: 10px;
    
    /* [修改] 宽度调小 (140px -> 100px)，看起来更精致 */
    width: 100px;
    
    background-color: var(--header-bg); 
    backdrop-filter: blur(25px); -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--btn-border);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.25);
    
    padding: 6px; /* 内边距稍微减小 */
    z-index: 3001;
    
    opacity: 0; transform: translateY(-10px) scale(0.95); pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  }

  #mobile-menu-dropdown.is-open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
  }

  /* 菜单项按钮 */
  .menu-item {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.9rem;
    padding: 10px 4px; 
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s; /* 改为 all，让颜色变化也平滑 */
    
    display: flex; 
    align-items: center; 
    justify-content: center; 
    text-align: center;      
  }

  /* [新增] Hover 效果 (桌面端调试或外接鼠标时可见) */
  .menu-item:hover {
    background-color: var(--text-primary); /* 背景变黑(亮色模式) 或 变白(暗色模式) */
    color: var(--bg-color);                /* 文字变白(亮色模式) 或 变黑(暗色模式) */
  }

  /* [修改] Active 效果：保持反转色，同时缩放 */
  .menu-item:active {
    background-color: var(--text-primary);
    color: var(--bg-color);
    transform: scale(0.96);
    opacity: 0.9; /* 稍微加一点透明度区别按压感 */
  }

  /* 分割线 (注意：因为 hover 会变色，分割线最好不要太显眼，或者保持原样) */
  .menu-item:not(:last-child) {
    border-bottom: 1px solid rgba(125, 125, 125, 0.1);
    margin-bottom: 4px;
  }
  
  /* 亮色模式适配 (增强背景白度，匹配亮色 Header) */
  [data-theme="light"] #mobile-menu-dropdown {
    /* 确保使用 header-bg 变量，或者稍微加重一点点以防太透 */
    background-color: var(--header-bg); 
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
  }
}