/* ============================================================
   侧边栏导航与统一布局 (sidebar.css)
   桌面端：左侧固定 220px 侧边栏
   移动端：隐藏侧边栏，保留底部 bot-tab
   所有页面容器宽度统一引用此处，方便统一修改
   ============================================================ */

/* ---------- 侧边栏本体 ---------- */
.site-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 220px;
  z-index: 95;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  background: rgba(255, 244, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid #ffd9e4;
  box-shadow: 2px 0 18px rgba(233, 130, 156, 0.12);
  padding: 1.5rem 1rem 1.2rem;
  overflow-y: auto;
  overflow-x: hidden;
}

/* 站点标识 */
.sidebar-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding-bottom: 1.2rem;
  margin-bottom: 1rem;
  border-bottom: 1px dashed #ffc9dc;
  text-decoration: none;
  color: inherit;
}
.sidebar-brand i {
  font-size: 2rem;
  color: #e982a2;
}
.sidebar-brand-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #e6728f, #b34262);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}
.sidebar-brand-sub {
  font-size: 0.68rem;
  color: #c7a0ab;
  letter-spacing: 1px;
}

/* 导航链接 */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.65rem 0.9rem;
  border-radius: 14px;
  color: #b5647c;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--d-2);
}
.sidebar-nav a i {
  width: 1.1rem;
  text-align: center;
  font-size: 1rem;
  color: #dc8aa3;
}
.sidebar-nav a:hover {
  background: #ffeaf1;
  color: #a83c5e;
  translate:3px 0;
}
.sidebar-nav a.active {
  background: linear-gradient(135deg, #ffe2ea, #ffd0dd);
  color: #a83c5e;
  font-weight: 600;
  box-shadow: 0 3px 10px rgba(233, 130, 156, 0.15);
}

/* 侧边栏底部小装饰图 */
.sidebar-deco {
  margin-top: auto;
  text-align: center;
  padding-top: 1rem;
}
.sidebar-deco img {
  width: 132px;
  max-width: 100%;
  border-radius: 18px;
  box-shadow: 0 8px 20px rgba(233, 130, 156, 0.22);
  border: 2px solid #ffffff;
  display: inline-block;
}
.sidebar-deco .deco-caption {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.66rem;
  color: #c7a0ab;
  letter-spacing: 1px;
}

/* ---------- 桌面端：容器统一引用 ---------- */
@media (min-width: 769px) {
  body {
    padding-left: 220px; /* 让出侧边栏宽度 */
    transition: padding-left var(--d-3) var(--e-out);
  }
  body.sidebar-collapsed {
    padding-left: 0 !important; /* 侧边栏收起时内容全宽居中 */
  }
  /* 各页面主容器统一 max-width 与居中 */
  .about-container,
  .archive-container,
  .guestbook-container,
  .blog-container,
  .toolbox-container,
  .music-container,
  main.container,
  main.page-container {
    max-width: 1200px !important;
    margin-left: auto !important;
    margin-right: auto !important;
  }
}

/* ---------- 侧边栏折叠动效 ---------- */
.site-sidebar {
  transition: transform var(--d-3) var(--e-out);
}
.site-sidebar.sidebar-hidden {
  transform: translateX(-100%);
}

/* 折叠/展开按钮（固定悬浮，始终可见） */
.sidebar-toggle-btn {
  position: fixed;
  top: 12px;
  left: 228px; /* 默认在侧边栏右缘外侧 */
  z-index: 96;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 244, 248, 0.9);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 2px 10px rgba(233, 130, 156, 0.25);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: left var(--d-3) var(--e-out), transform var(--d-2) var(--e-out);
}
.sidebar-toggle-btn:hover {
  scale:1.08;
  opacity: 1;
}
.sidebar-toggle-btn.is-collapsed {
  left: 12px; /* 侧边栏隐藏时按钮移到最左 */
  opacity: 0.4;
  transition: left var(--d-3) var(--e-out), transform var(--d-2) var(--e-out), opacity var(--d-2) var(--e-out);
}
.sidebar-toggle-btn.is-collapsed:hover {
  opacity: 1;
}
.sidebar-toggle-btn img {
  width: 36px;
  height: 36px;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}
@media (max-width: 768px) {
  .sidebar-toggle-btn {
    display: none !important; /* 移动端走 bot-tab，不需要折叠按钮 */
  }
}

/* ---------- 移动端：隐藏侧边栏 ---------- */
@media (max-width: 768px) {
  .site-sidebar {
    display: none !important;
  }
  body {
    padding-left: 0 !important;
  }
}

/* ---------- 各页面：愛音 CG 背景层（低透明度，不干扰内容） ---------- */
.anon-bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: center / cover no-repeat;
  opacity: 0.18;
}
.anon-bg-layer::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(255, 249, 247, 0.4), rgba(255, 238, 244, 0.5));
}
/* 每页独立图片 */
.bg-index   { background-image: url('../img/anon-bg.webp'); }
.bg-journal { background-image: url('../img/anon-journal.webp'); }
.bg-archive { background-image: url('../img/anon-archive.webp'); }
.bg-music   { background-image: url('../img/anon-music.webp'); }
.bg-tools   { background-image: url('../img/anon-tools.webp'); }
.bg-404     { background-image: url('../img/anon-404.webp'); }

/* ---------- 心情打卡按钮（全站唯一定义） ----------
   这里以前写的是「卡片 + 64px 图片」，而 Journal.css 在它之后又把
   .mood-btn 定义成 44×44 的圆钮。两个定义叠加的结果是：44px 的盒子先被
   8px/12px 的 padding 吃掉一圈（内容区只剩 20×28），再被塞进一张 64px 的
   图片，图片直接撑出按钮 —— 桌面和手机上都溢出。
   现在这里只负责「形状 + 图片填充」，尺寸交给页面层（Journal.css 定为
   44px 圆钮）；图片一律填满按钮并裁切，不再写死像素。
   注意：统一修这一处会同时改变桌面端日记页心情按钮的观感（从溢出变成
   规整的圆钮），这是本次唯一一处有意动到桌面观感的改动。 */
.mood-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 48px;
  height: 48px;
  padding: 0;
  overflow: hidden;
  border: 2px solid #ffe0e8;
  border-radius: 16px;
  background: #fffefb;
  cursor: pointer;
  transition: var(--d-2);
}
.mood-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  display: block;
}
.mood-btn:hover {
  translate:0 -3px;
  box-shadow: 0 6px 14px rgba(233, 130, 156, 0.22);
}
.mood-btn.active {
  border-color: #e982a2;
  background: #ffeaf1;
  box-shadow: 0 4px 12px rgba(233, 130, 156, 0.28);
}