/* ============================================================
   CSS 变量（深色/浅色主题）
   ============================================================ */
:root,
:root[data-theme="dark"] {
  --bg-base: #0a0a1a;
  --bg-gradient-1: #1a1a3a;
  --bg-gradient-2: #2a1a3a;
  --bg-blob-1: #4f7cff;
  --bg-blob-2: #b04fff;
  --bg-blob-3: #4fffe0;

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-highlight: rgba(255, 255, 255, 0.08);

  --text-primary: #fff;
  --text-secondary: #e8eaf2;
  --text-tertiary: #a8b0c8;
  --text-muted: #8a92ad;
  --text-faint: #6a7090;
  --text-dimmer: #4a5070;

  --accent: #4f7cff;
  --accent-soft: rgba(79, 124, 255, 0.18);
  --accent-border: rgba(79, 124, 255, 0.35);
  --accent-text: #aac4ff;
  --accent-text-hover: #fff;
  --accent-glow: rgba(79, 124, 255, 0.4);

  --warning: #ffcc66;
  --danger: #ff5050;
  --danger-soft: rgba(255, 80, 80, 0.18);
  --danger-border: rgba(255, 80, 80, 0.4);
  --danger-text: #ffb0b0;

  --item-bg: rgba(255, 255, 255, 0.04);
  --item-bg-hover: rgba(255, 255, 255, 0.08);
  --item-border: rgba(255, 255, 255, 0.06);
  --divider: rgba(255, 255, 255, 0.06);
  --input-placeholder: #8a92ad;

  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg-base: #eef0f7;
  --bg-gradient-1: #dfe4ff;
  --bg-gradient-2: #ffe0f5;
  --bg-blob-1: #9bb5ff;
  --bg-blob-2: #d99bff;
  --bg-blob-3: #9bfff0;

  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-shadow: 0 8px 32px rgba(99, 99, 153, 0.15);
  --glass-highlight: rgba(255, 255, 255, 0.5);

  --text-primary: #1a1a2e;
  --text-secondary: #2a2a3e;
  --text-tertiary: #4a4a6a;
  --text-muted: #6a6a8a;
  --text-faint: #8a8aaa;
  --text-dimmer: #aaaacc;

  --accent: #4070ee;
  --accent-soft: rgba(64, 112, 238, 0.15);
  --accent-border: rgba(64, 112, 238, 0.4);
  --accent-text: #4070ee;
  --accent-text-hover: #fff;
  --accent-glow: rgba(64, 112, 238, 0.3);

  --warning: #d97e00;
  --danger: #e03030;
  --danger-soft: rgba(224, 48, 48, 0.15);
  --danger-border: rgba(224, 48, 48, 0.4);
  --danger-text: #e03030;

  --item-bg: rgba(255, 255, 255, 0.5);
  --item-bg-hover: rgba(255, 255, 255, 0.85);
  --item-border: rgba(0, 0, 0, 0.06);
  --divider: rgba(0, 0, 0, 0.08);
  --input-placeholder: #8a8aaa;

  color-scheme: light;
}

/* ============================================================
   基础重置
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text-secondary);
  background: var(--bg-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ============================================================
   背景：动态渐变 + 三个浮动光斑
   ============================================================ */
.bg-layer {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(at 20% 10%, var(--bg-gradient-1) 0%, transparent 50%),
    radial-gradient(at 80% 90%, var(--bg-gradient-2) 0%, transparent 50%),
    linear-gradient(135deg, var(--bg-base) 0%, var(--bg-base) 100%);
  transition: background 0.3s ease;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: float 18s ease-in-out infinite;
}
.blob-1 {
  width: 380px; height: 380px;
  background: var(--bg-blob-1);
  top: -100px; left: -100px;
  animation-delay: 0s;
}
.blob-2 {
  width: 320px; height: 320px;
  background: var(--bg-blob-2);
  top: 40%; right: -80px;
  animation-delay: -6s;
}
.blob-3 {
  width: 280px; height: 280px;
  background: var(--bg-blob-3);
  bottom: -80px; left: 30%;
  animation-delay: -12s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(40px, -30px) scale(1.05); }
  66%      { transform: translate(-30px, 40px) scale(0.95); }
}

/* ============================================================
   玻璃卡片基础
   ============================================================ */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--glass-shadow), inset 0 1px 0 var(--glass-highlight);
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* ============================================================
   布局
   ============================================================ */
.container {
  max-width: 880px;
  margin: 0 auto;
  padding: max(32px, env(safe-area-inset-top)) 20px max(60px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ============================================================
   顶部 hero
   ============================================================ */
.hero {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 32px;
  gap: 20px;
}
.hero-left { flex: 1; }
.hero-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.greeting {
  font-size: 14px;
  color: var(--text-tertiary);
  letter-spacing: 1px;
}
.location {
  font-size: 26px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.date-line {
  font-size: 14px;
  color: var(--text-muted);
}
.hero-right {
  text-align: right;
}
.clock {
  font-size: 36px;
  font-weight: 200;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  letter-spacing: 1px;
  text-shadow: 0 0 20px var(--accent-glow);
}
.week-tag {
  display: inline-block;
  margin-top: 6px;
  padding: 4px 10px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--accent-text);
}

/* 主题切换按钮 */
.theme-toggle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  padding: 0;
  transition: all 0.2s ease;
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  transform: rotate(20deg);
}

/* ============================================================
   天气卡片
   ============================================================ */
.weather-card {
  display: flex;
  align-items: center;
  padding: 24px 28px;
  gap: 24px;
}
.weather-icon {
  font-size: 64px;
  line-height: 1;
  filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.2));
}
.weather-body { flex: 1; }
.weather-main {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 6px;
}
.temp {
  font-size: 42px;
  font-weight: 300;
  color: var(--text-primary);
  line-height: 1;
}
.deg { font-size: 18px; color: var(--text-tertiary); }
.weather-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.weather-extra {
  font-size: 13px;
  color: var(--text-muted);
}
.umbrella {
  font-size: 14px;
  color: var(--warning);
  text-align: right;
  max-width: 180px;
  line-height: 1.5;
}

/* ============================================================
   课表卡片
   ============================================================ */
.courses-card { padding: 24px 28px; }
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.card-header h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}
.card-sub {
  font-size: 13px;
  color: var(--text-muted);
}
.card-actions {
  display: flex;
  gap: 6px;
  margin-left: auto;
}
.card-action-btn {
  padding: 5px 10px;
  font-size: 12px;
  background: var(--item-bg, rgba(255,255,255,0.04));
  border: 1px solid var(--glass-border, rgba(255,255,255,0.1));
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.card-action-btn:hover {
  background: rgba(124,156,255,0.12);
  border-color: rgba(124,156,255,0.4);
}
.card-action-danger:hover {
  background: rgba(255,80,80,0.12);
  border-color: rgba(255,80,80,0.4);
  color: #ff8888;
}
/* 日期选择条：快捷按钮 + 日期输入框 */
.schedule-picker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.quick-dates {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.quick-date {
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--item-border);
  background: var(--item-bg);
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}
.quick-date:hover {
  border-color: var(--accent-border);
  color: var(--text-primary);
}
.quick-date.active {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent-text);
  font-weight: 600;
}
.date-picker {
  padding: 5px 10px;
  border-radius: 10px;
  border: 1px solid var(--item-border);
  background: var(--item-bg);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  color-scheme: dark;
  cursor: pointer;
}
.date-picker:hover { border-color: var(--accent-border); }
:root[data-theme="light"] .date-picker { color-scheme: light; }

/* 周次切换器 */
.week-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: -4px 0 14px;
  padding: 6px 0;
}
.week-nav-label {
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 80px;
  text-align: center;
}
.week-nav-btn {
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 1px solid var(--item-border);
  background: var(--item-bg);
  color: var(--text-secondary);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}
.week-nav-btn:hover:not(:disabled) {
  border-color: var(--accent-border);
  color: var(--accent-text);
  background: var(--accent-soft);
}
.week-nav-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* 假期 banner */
.break-banner {
  padding: 28px 16px;
  text-align: center;
  font-size: 14px;
  color: var(--accent-text);
  background: var(--accent-soft);
  border: 1px dashed var(--accent-border);
  border-radius: 12px;
}

.courses-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.course-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  border-radius: 12px;
  transition: all 0.2s ease;
}
.course-item:hover {
  background: var(--item-bg-hover);
  transform: translateX(4px);
}
.course-item.empty { opacity: 0.5; }
.course-period {
  flex-shrink: 0;
  width: 96px;
  padding: 6px 10px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  font-size: 12px;
  color: var(--accent-text);
  text-align: center;
  line-height: 1.4;
}
.course-period .time { display: block; font-size: 10px; color: var(--text-muted); margin-top: 2px; }
.course-info { flex: 1; }
.course-name {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 2px;
}
.course-meta { font-size: 12px; color: var(--text-muted); }
.placeholder { color: var(--text-muted); font-size: 14px; text-align: center; padding: 20px 0; }

/* ============================================================
   底部
   ============================================================ */
.footer {
  text-align: center;
  padding: 16px 0;
  font-size: 12px;
  color: var(--text-faint);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.footer a {
  display: inline-block;
  padding: 8px 14px;
  min-height: 36px;
  border-radius: 8px;
  color: var(--accent-text);
  text-decoration: none;
  transition: background 0.15s ease;
}
.footer a:hover { text-decoration: underline; }
.footer a:active { background: var(--accent-soft); }
.footer .dot { color: var(--text-dimmer); }
.footer .beian {
  padding: 0;
  min-height: 0;
  color: var(--text-faint);
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.footer .beian:hover { text-decoration: underline; background: transparent; }
.footer .beian-icon { width: 14px; height: 14px; vertical-align: middle; }

/* ============================================================
   文件柜
   ============================================================ */
.files-card { padding: 24px 28px; }
.upload-zone {
  border: 2px dashed var(--glass-border);
  border-radius: 14px;
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--item-bg);
  margin-bottom: 16px;
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.upload-icon {
  display: block;
  font-size: 32px;
  color: var(--accent-text);
  margin-bottom: 6px;
}
.upload-hint p { color: var(--text-secondary); font-size: 14px; margin: 2px 0; }
.upload-hint .upload-sub { color: var(--text-faint); font-size: 12px; }

.upload-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 14px;
}
.upload-action-btn {
  padding: 8px 16px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  color: var(--accent-text);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}
.upload-action-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text-hover);
  transform: translateY(-1px);
}

.upload-progress {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--item-bg);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--bg-blob-2));
  border-radius: 3px;
  transition: width 0.2s ease;
}
.progress-text {
  font-size: 12px;
  color: var(--accent-text);
  min-width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.files-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 360px;
  overflow-y: auto;
  padding-right: 4px;
}
.files-list::-webkit-scrollbar { width: 6px; }
.files-list::-webkit-scrollbar-track { background: transparent; }
.files-list::-webkit-scrollbar-thumb { background: var(--item-border); border-radius: 3px; }

/* 文件项：左滑删除容器 */
.file-item-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
}
.file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  border-radius: 10px;
  transition: background 0.2s ease, transform 0.18s ease;
  position: relative;
  z-index: 1;
  touch-action: pan-y;
}
.file-item:hover { background: var(--item-bg-hover); }
.file-item.swiping { transition: none; }
.file-icon {
  font-size: 22px;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
}
.file-info { flex: 1; min-width: 0; }
.file-name {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}
.file-path {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}
.file-meta { font-size: 11px; color: var(--text-faint); }
.owner-badge {
  display: inline-block;
  padding: 1px 7px;
  margin-left: 2px;
  font-size: 10px;
  font-weight: 600;
  color: var(--accent, #7c9cff);
  background: color-mix(in srgb, var(--accent, #7c9cff) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent, #7c9cff) 30%, transparent);
  border-radius: 999px;
  vertical-align: 1px;
  white-space: nowrap;
}
.file-actions { display: flex; gap: 6px; flex-shrink: 0; }
.file-btn {
  padding: 5px 10px;
  background: var(--item-bg);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  display: inline-block;
  font-family: inherit;
}
.file-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--text-primary);
}
.file-btn.danger:hover {
  background: var(--danger-soft);
  border-color: var(--danger-border);
  color: var(--danger-text);
}
/* 文件类型筛选 */
.file-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--item-border);
}
.file-filter-btn {
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--item-border);
  background: var(--item-bg);
  color: var(--text-secondary);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}
.file-filter-btn:hover { border-color: var(--accent-border); color: var(--text-primary); }
.file-filter-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent-text);
  font-weight: 600;
}

/* 分享中 + 分享过期标签 */
.share-remaining {
  font-size: 11px;
  color: var(--accent-text);
  margin-left: 6px;
  padding: 2px 6px;
  background: var(--accent-soft);
  border-radius: 8px;
}

/* 分享按钮：分享中显示高亮态 */
.file-btn.share { color: var(--accent-text); }
.file-btn.share.shared {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent-text);
  font-weight: 600;
}

/* 左滑出现的删除背景 */
.swipe-action {
  position: absolute;
  top: 0; bottom: 0;
  width: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  z-index: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}
.swipe-action.swipe-del    { right: 0;    background: var(--danger); }
.swipe-action.swipe-share  { right: 80px; background: var(--accent); }
.swipe-action.visible { opacity: 1; pointer-events: auto; }
.swipe-action:active { filter: brightness(0.85); }

/* ============================================================
   响应式
   ============================================================ */

/* 平板及以下 */
@media (max-width: 768px) {
  .container { padding: 20px 16px 40px; gap: 16px; }
  .hero { padding: 22px 24px; }
  .location { font-size: 22px; }
  .clock { font-size: 32px; }
}

/* 手机 */
@media (max-width: 640px) {
  .container { padding: 16px 12px 32px; gap: 14px; }

  .hero { flex-direction: column; align-items: flex-start; padding: 18px 20px; gap: 12px; }
  .hero-right { text-align: left; width: 100%; }
  .greeting { font-size: 13px; margin-bottom: 2px; }
  .location { font-size: 20px; margin-bottom: 4px; }
  .date-line { font-size: 13px; }
  .clock { font-size: 30px; letter-spacing: 0.5px; }
  .week-tag { font-size: 11px; padding: 3px 8px; }

  .weather-card { padding: 18px 20px; gap: 16px; flex-wrap: wrap; }
  .weather-icon { font-size: 44px; }
  .weather-body { flex: 1; min-width: 0; }
  .temp { font-size: 32px; }
  .deg { font-size: 16px; }
  .weather-desc { font-size: 14px; }
  .weather-extra { font-size: 12px; }
  .umbrella {
    text-align: left;
    max-width: 100%;
    width: 100%;
    font-size: 13px;
    padding-top: 8px;
    border-top: 1px solid var(--divider);
  }

  .courses-card { padding: 18px 20px; }
  .card-header h2 { font-size: 16px; }
  .card-sub { font-size: 12px; }
  .course-item { padding: 10px 12px; gap: 10px; }
  .course-period {
    width: 76px;
    font-size: 11px;
    padding: 4px 6px;
    line-height: 1.3;
  }
  .course-period .time { font-size: 9px; margin-top: 1px; }
  .course-name { font-size: 14px; }
  .course-meta { font-size: 11px; }

  .files-card { padding: 18px 20px; }
  .upload-zone { padding: 22px 14px; margin-bottom: 12px; }
  .upload-icon { font-size: 26px; margin-bottom: 4px; }
  .upload-hint p { font-size: 13px; }
  .upload-hint .upload-sub { font-size: 11px; }
  .upload-actions { flex-direction: column; gap: 8px; margin-top: 12px; }
  .upload-action-btn {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    min-height: 44px;
  }
  .files-list { max-height: 320px; }
  .file-item {
    flex-wrap: wrap;
    padding: 10px 12px;
    gap: 8px;
  }
  .file-icon { font-size: 20px; width: 28px; }
  .file-info { flex: 1 1 calc(100% - 36px); min-width: 0; }
  .file-name { font-size: 13px; }
  .file-path { font-size: 10px; }
  .file-meta { font-size: 10px; }
  .file-actions {
    width: 100%;
    justify-content: flex-end;
    border-top: 1px solid var(--divider);
    padding-top: 8px;
    margin-top: 2px;
  }
  .file-btn {
    padding: 8px 14px;
    font-size: 12px;
    min-height: 36px;
  }
  .progress-text { font-size: 11px; min-width: 32px; }

  .footer { font-size: 11px; gap: 6px; }
}

/* 小屏手机 */
@media (max-width: 380px) {
  .container { padding: 12px 10px 28px; }
  .hero { padding: 16px 16px; }
  .location { font-size: 18px; }
  .clock { font-size: 26px; }
  .weather-card { padding: 16px; }
  .courses-card, .files-card { padding: 16px; }
  .course-period { width: 68px; }
  .course-item { padding: 8px 10px; }
}

/* ============================================================
   顶部用户栏
   ============================================================ */
.user-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 8px 14px;
  margin: 0 auto 14px;
  max-width: 480px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.user-bar .who {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  border-radius: 999px;
  color: var(--text-secondary);
}
.user-bar .who .role-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-text);
  border: 1px solid var(--accent-border);
}
.user-bar .who .role-badge.user {
  background: var(--item-bg);
  color: var(--text-muted);
  border-color: var(--item-border);
}
.user-bar .link-btn,
.user-bar .logout-btn {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  text-decoration: none;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.user-bar .link-btn:hover,
.user-bar .logout-btn:hover {
  background: var(--item-bg-hover);
}
.user-bar .logout-btn {
  background: var(--danger-soft);
  border-color: var(--danger-border);
  color: var(--danger-text);
}
.user-bar .logout-btn:hover {
  background: var(--danger-border);
  color: #fff;
}

/* ============================================================
   登录/注册卡片
   ============================================================ */
.auth-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.auth-card {
  width: min(440px, 100%);
  padding: 40px 32px 32px;
  text-align: center;
  margin: 0 auto;
}
/* 品牌区：logo + 欢迎语 + 渐变标题 */
.auth-brand { margin-bottom: 28px; }
.auth-logo {
  width: 76px;
  height: 76px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--accent-soft), rgba(138, 111, 255, 0.28));
  border: 1px solid var(--accent-border);
  box-shadow: 0 10px 36px var(--accent-glow);
}
.auth-welcome {
  font-size: 12px;
  letter-spacing: 6px;
  color: var(--text-muted);
  margin-bottom: 8px;
  padding-left: 6px; /* 抵消 letter-spacing 尾部空隙 */
}
.auth-title {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 8px;
  background: linear-gradient(100deg, var(--text-primary) 20%, var(--accent-text) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.auth-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 4px;
}
.form-group input {
  padding: 12px 14px;
  font-size: 14px;
  border-radius: 12px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  width: 100%;
  box-sizing: border-box;
}
.form-group input::placeholder {
  color: var(--input-placeholder);
}
.form-group input:focus {
  border-color: var(--accent-border);
  background: var(--item-bg-hover);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
/* 密码框 + 显示/隐藏眼睛 */
.pwd-wrap { position: relative; }
.pwd-wrap input { padding-right: 44px; }
.pwd-eye {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 17px;
  opacity: 0.45;
  padding: 6px;
  line-height: 1;
  transition: opacity 0.15s;
}
.pwd-eye:hover { opacity: 1; }
.form-error {
  background: var(--danger-soft);
  border: 1px solid var(--danger-border);
  color: var(--danger-text);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
}
.auth-submit {
  margin-top: 8px;
  padding: 13px 16px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--accent), #8a6fff);
  color: #fff;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.auth-submit:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
}
.auth-submit:disabled {
  opacity: 0.6;
  cursor: wait;
}
.auth-switch {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-muted);
}
.auth-switch a {
  color: var(--accent-text);
  margin-left: 6px;
  cursor: pointer;
  text-decoration: none;
  border-bottom: 1px dashed var(--accent-border);
}
.auth-switch a:hover {
  color: var(--accent-text-hover);
}
.auth-hint {
  margin-top: 18px;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text-tertiary);
  background: var(--accent-soft);
  border: 1px dashed var(--accent-border);
  border-radius: 10px;
  text-align: center;
}
.auth-hint.warn {
  background: var(--danger-soft);
  border-color: var(--danger-border);
  color: var(--danger-text);
}

/* ============================================================
   课表邮箱管理
   ============================================================ */
.email-section {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--divider);
}
.email-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.email-section-head h3 {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}
.email-toggle-btn {
  background: transparent;
  border: 1px solid var(--item-border);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s;
}
.email-toggle-btn:hover {
  background: var(--item-bg-hover);
  color: var(--text-secondary);
}
.email-add-form {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.email-add-form input {
  flex: 1;
  min-width: 0;
  padding: 8px 12px;
  font-size: 13px;
  border-radius: 10px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.15s;
}
.email-add-form input:focus {
  border-color: var(--accent-border);
}
.email-add-form button {
  padding: 8px 14px;
  font-size: 13px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}
.email-add-form button:disabled {
  opacity: 0.5;
  cursor: wait;
}
.email-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.email-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  border-radius: 10px;
  font-size: 13px;
}
.email-item .email-addr {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-secondary);
}
.email-item .email-del {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}
.email-item .email-del:hover {
  background: var(--danger-soft);
  color: var(--danger-text);
}
.email-empty {
  font-size: 12px;
  color: var(--text-faint);
  text-align: center;
  padding: 12px;
}
.email-error {
  margin-top: 4px;
  font-size: 12px;
  color: var(--danger-text);
}

/* ============================================================
   管理页（成员管理）
   ============================================================ */
.admin-container {
  max-width: 720px;
}
.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.admin-header h2 {
  font-size: 18px;
  color: var(--text-primary);
}
.admin-header .back-link {
  font-size: 13px;
  color: var(--accent-text);
  text-decoration: none;
  border: 1px solid var(--accent-border);
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
}
.admin-header .back-link:hover {
  color: var(--accent-text-hover);
  background: var(--accent);
}
.admin-add-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto auto;
  gap: 8px;
  margin-bottom: 16px;
}
.admin-add-form input,
.admin-add-form select {
  padding: 10px 12px;
  font-size: 14px;
  border-radius: 10px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  color: var(--text-primary);
  outline: none;
  min-width: 0;
}
.admin-add-form input:focus,
.admin-add-form select:focus {
  border-color: var(--accent-border);
}
.admin-add-form button {
  padding: 10px 18px;
  font-size: 13px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
}
.admin-add-form button:disabled {
  opacity: 0.5;
  cursor: wait;
}
.admin-add-form .err-msg {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--danger-text);
}
.user-table {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.user-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--item-bg);
  border: 1px solid var(--item-border);
  border-radius: 12px;
}
.user-row.me {
  border-color: var(--accent-border);
  background: var(--accent-soft);
}
.user-row .user-name {
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.user-row .me-tag {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
}
.user-row .user-meta {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 2px;
}
.user-row .user-role {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-text);
  border: 1px solid var(--accent-border);
}
.user-row .user-role.user {
  background: var(--item-bg);
  color: var(--text-muted);
  border-color: var(--item-border);
}
.user-row .actions {
  display: flex;
  gap: 6px;
}
.user-row .actions button {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 8px;
  border: 1px solid var(--item-border);
  background: var(--glass-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.user-row .actions button:hover:not(:disabled) {
  background: var(--item-bg-hover);
}
.user-row .actions button.danger {
  border-color: var(--danger-border);
  background: var(--danger-soft);
  color: var(--danger-text);
}
.user-row .actions button.danger:hover:not(:disabled) {
  background: var(--danger-border);
  color: #fff;
}
.user-row .actions button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.admin-hint {
  font-size: 12px;
  color: var(--text-faint);
  text-align: center;
  margin-top: 16px;
}
@media (max-width: 600px) {
  .admin-add-form {
    grid-template-columns: 1fr 1fr;
  }
  .admin-add-form button {
    grid-column: 1 / -1;
  }
  .user-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .user-row .actions {
    justify-content: flex-end;
  }
}

/* ============================================================
   通用：对话框 / 提示
   ============================================================ */
.toast {
  position: fixed;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  padding: 10px 18px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  color: var(--text-primary);
  font-size: 13px;
  z-index: 9999;
  box-shadow: var(--glass-shadow);
  animation: toast-in 0.2s ease-out;
}
.toast.error {
  background: var(--danger-soft);
  border-color: var(--danger-border);
  color: var(--danger-text);
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 10px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ============================================================
   邮箱开关（toggle switch）+ 系统默认邮箱区块
   ============================================================ */
.email-panel-hint {
  font-size: 11px;
  color: var(--text-faint);
  margin-bottom: 10px;
  padding-left: 2px;
}
.email-item.off .email-addr {
  color: var(--text-faint);
  text-decoration: line-through;
  text-decoration-color: var(--text-faint);
}
.email-item.off {
  opacity: 0.65;
}

/* 开关本体 */
.switch {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 20px;
  flex-shrink: 0;
  cursor: pointer;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.switch .slider {
  position: absolute;
  inset: 0;
  background: var(--item-bg-hover);
  border: 1px solid var(--item-border);
  border-radius: 999px;
  transition: background 0.2s, border-color 0.2s;
}
.switch .slider::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 2px;
  top: 2px;
  background: var(--text-tertiary);
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}
.switch input:checked + .slider {
  background: var(--accent-soft);
  border-color: var(--accent-border);
}
.switch input:checked + .slider::before {
  transform: translateX(14px);
  background: var(--accent);
}

/* 系统默认邮箱区块（仅管理员） */
.email-sys-section {
  margin-top: 16px;
  padding: 12px;
  border: 1px dashed var(--accent-border);
  border-radius: 12px;
  background: var(--accent-soft);
}
.email-sys-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.email-sys-head h4 {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 600;
}
.email-sys-sub {
  font-size: 11px;
  color: var(--text-faint);
}
.email-sys-section .email-item {
  background: var(--item-bg);
}

/* ============================================================
   课表导入预览 modal
   ============================================================ */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: modalFadeIn 0.18s ease-out;
}
/* HTML hidden 属性优先级要高于 display:flex */
.modal-mask[hidden] { display: none !important; }
@keyframes modalFadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-box {
  background: linear-gradient(180deg, #1e2740 0%, #161b2e 100%);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  width: 100%;
  max-width: 640px;
  max-height: 86vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
  animation: modalSlideIn 0.22s ease-out;
}
@keyframes modalSlideIn { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.modal-head h3 { margin: 0; font-size: 16px; color: #fff; font-weight: 600; }
.modal-close {
  background: transparent;
  border: 0;
  color: rgba(255,255,255,0.6);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
  padding: 0 6px;
}
.modal-close:hover { color: #fff; }

.modal-body {
  padding: 16px 20px;
  overflow-y: auto;
  flex: 1;
  color: rgba(255,255,255,0.85);
  font-size: 13px;
}
.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.modal-btn {
  padding: 7px 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 13px;
  cursor: pointer;
  font-weight: 500;
}
.modal-btn-cancel {
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.8);
  border-color: rgba(255,255,255,0.12);
}
.modal-btn-cancel:hover { background: rgba(255,255,255,0.1); }
.modal-btn-confirm {
  background: linear-gradient(90deg, #4f7fff 0%, #6b8dff 100%);
  color: #fff;
  border-color: rgba(255,255,255,0.2);
}
.modal-btn-confirm:hover { filter: brightness(1.1); }
.modal-btn-confirm:disabled { opacity: 0.5; cursor: not-allowed; }

.preview-meta {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 12px;
  line-height: 1.7;
}
.preview-meta b { color: #6b8dff; }

.preview-weekstart {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  margin-bottom: 12px;
}
.preview-weekstart label { color: rgba(255,255,255,0.7); font-size: 13px; }
.preview-weekstart input[type=date] {
  padding: 6px 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  color: #fff;
  border-radius: 6px;
  font-size: 13px;
}
.preview-hint { color: rgba(255,255,255,0.4); font-size: 11px; }

.preview-sample {
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 6px 0;
}
.preview-day {
  padding: 8px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.preview-day:last-child { border-bottom: 0; }
.preview-day-head {
  color: #6b8dff;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 4px;
}
.preview-slot {
  color: rgba(255,255,255,0.85);
  font-size: 12px;
  padding: 2px 0;
}

.preview-warning {
  background: rgba(255,180,80,0.1);
  border: 1px solid rgba(255,180,80,0.3);
  border-radius: 10px;
  padding: 10px 14px;
  color: #ffc878;
  font-size: 12px;
  margin-top: 10px;
}