/* ==========================================================================
   课表系统样式
   设计目标：信息密度高但不拥挤；调休/调课/冲突等状态一眼可辨；支持深色模式。
   ========================================================================== */

:root {
  --bg: #f8fafd;
  --panel: #ffffff;
  --panel-2: #f1f5f9;
  --text: #1f2937;
  --muted: #596579;
  --border: #e3e8ef;
  --border-strong: #c5cfda;
  --primary: #1967d2;
  --primary-weak: #e8f0fe;
  --danger: #b3261e;
  --danger-weak: #fce8e6;
  --warn: #9a6000;
  --warn-weak: #fff3d6;
  --ok: #137333;
  --ok-weak: #e6f4ea;
  --shadow-sm: 0 1px 3px rgba(31, 41, 55, 0.06);
  --shadow: 0 4px 18px rgba(31, 41, 55, 0.09);
  --shadow-lg: 0 18px 48px rgba(31, 41, 55, 0.15);
  --radius: 18px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --ease: cubic-bezier(.4, 0, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ring: 0 0 0 3px var(--primary-weak);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161f;
    --panel: #1a1f2b;
    --panel-2: #202634;
    --text: #e9eef7;
    --muted: #909cb0;
    --border: #2a3140;
    --border-strong: #3a4356;
    --primary: #6b93ff;
    --primary-weak: #1e2740;
    --danger: #ff6b6b;
    --danger-weak: #36232a;
    --warn: #f5a524;
    --warn-weak: #352d1e;
    --ok: #34d399;
    --ok-weak: #1c3329;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 14px 44px rgba(0, 0, 0, 0.55);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: color-mix(in srgb, var(--primary) 22%, transparent); }

/* 细滚动条，与面板色协调 */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: var(--muted); }
*::-webkit-scrollbar-track { background: transparent; }

.hidden { display: none !important; }
.muted { color: var(--muted); }

button { font-family: inherit; font-size: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: inherit; }

/* ------------------------------ 通用控件 ------------------------------ */

.btn {
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  padding: 9px 15px;
  min-height: 38px;
  border-radius: 999px;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease), transform .1s var(--ease);
  white-space: nowrap;
  font-weight: 500;
}
.btn:hover { background: var(--panel-2); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { box-shadow: var(--ring); outline: none; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: color-mix(in srgb, var(--primary) 88%, #000); box-shadow: var(--shadow); }

.btn-ghost {
  border-color: var(--border);
  background: var(--panel);
}
.btn-ghost:hover { border-color: var(--border-strong); background: var(--panel-2); }

.btn-danger { color: var(--danger); border-color: var(--danger); background: transparent; }
.btn-danger:hover { background: var(--danger-weak); }

.btn-icon {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius-sm);
  font-size: 18px;
  line-height: 1;
  padding: 0;
}

.btn-block { width: 100%; padding: 10px; font-weight: 600; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }
input[type='checkbox'], input[type='radio'] { accent-color: var(--primary); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); }
.tab {
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--muted);
  padding: 11px 14px 10px;
  border-radius: 0;
  font-weight: 500;
  white-space: nowrap;
}
.tab:hover { background: var(--panel-2); color: var(--text); }
.tab.active { border-bottom-color: var(--primary); color: var(--primary); font-weight: 600; }
.tab:focus-visible, .week-current:focus-visible, .day-pill:focus-visible, .more-item:focus-visible,
.modal-close:focus-visible, .theme-swatch:focus-visible, .choice:focus-visible,
.course:focus-visible, .cell-bg:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

/* ------------------------------ 登录页 ------------------------------ */

.auth {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 38px 36px;
  animation: pop .3s var(--ease-out);
}

.auth-brand { text-align: center; margin-bottom: 22px; }
.auth-brand h1 { font-size: 26px; margin: 0; letter-spacing: -.02em; }

.auth-form { margin-top: 24px; display: flex; flex-direction: column; gap: 17px; }

.field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.field-label { font-size: 13px; color: var(--text); font-weight: 600; }
.field-hint { font-size: 12px; color: var(--muted); opacity: .85; line-height: 1.5; }
.field-label .req { color: var(--danger, #e5484d); font-style: normal; margin-left: 2px; }
.field input, .field select, .field textarea {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  min-height: 44px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-weak);
}

.check { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.check input { width: auto; }

.error {
  background: var(--danger-weak);
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  border-radius: var(--radius-sm);
  padding: 8px 11px;
  font-size: 13px;
}

/* ------------------------------ 顶栏 ------------------------------ */

.app { min-height: 100%; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 28px;
  background: color-mix(in srgb, var(--panel) 96%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
  flex-wrap: wrap;
}

.topbar-left { display: flex; align-items: center; gap: 12px; min-width: 180px; }
.topbar-title { line-height: 1.25; display: flex; flex-direction: column; }
.app-title { font-weight: 700; font-size: 17px; letter-spacing: -.02em; margin-bottom: 4px; }
.app-sub { font-size: 12px; }

.topbar-center { display: flex; align-items: center; gap: 8px; margin: 0 auto; }
.topbar-right { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; position: relative; margin-left: auto; }
.topbar-actions { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.topbar-divider { width: 1px; height: 22px; background: var(--border); margin: 0 3px; flex: 0 0 auto; }

/* 右上角用户身份区：昵称 + 角色徽章 */
.topbar-identity {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  max-width: 200px;
}
.user-nick {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

/* 窄屏「更多」菜单：把次要操作收进下拉，避免顶栏按钮挤爆 */
.topbar-more { display: none; font-size: 15px; line-height: 1; padding: 7px 11px; }
.more-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 60;
  min-width: 176px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .14);
}
.more-item {
  appearance: none;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 9px 10px;
  font-size: 13.5px;
  color: var(--text);
  border-radius: 7px;
  cursor: pointer;
}
.more-item:hover, .more-item:focus-visible { background: var(--primary-weak); color: var(--primary); }

/* 统一设置中心：分组标题与操作区 */
.set-section { margin: 14px 0 8px; padding-top: 10px; border-top: 1px solid var(--border); }
.set-section:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.set-title { font-size: 13px; font-weight: 600; }
.set-hint { font-size: 12px; margin-top: 3px; line-height: 1.5; }
.set-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.temporary-password {
  padding: 14px 16px;
  border: 1px dashed var(--primary);
  border-radius: var(--radius-sm);
  background: var(--primary-weak);
  color: var(--primary);
  font: 700 22px/1.3 ui-monospace, Consolas, monospace;
  letter-spacing: .12em;
  text-align: center;
  user-select: all;
}

.week-current {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-weight: 600;
  min-width: 100px;
}
.week-current:hover { border-color: var(--border-strong); }

.countdown {
  /* 位于品牌区最底部（班级名称、学期行之下），作为一条实时状态行 */
  display: inline-block;
  font-size: 12px;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 3px;
}
.countdown strong { color: var(--primary); font-weight: 600; }

.progress-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.progress-bar {
  flex: 1;
  height: 7px;
  background: var(--panel-2);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-fill {
  height: 100%;
  width: 0;
  background: var(--primary);
  border-radius: 999px;
  transition: width .5s var(--ease-out);
  box-shadow: none;
}
.progress-text { font-size: 12.5px; white-space: nowrap; }

/* ------------------------------ 主体布局 ------------------------------ */

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
  width: 100%;
  max-width: 1680px;
  margin: 0 auto;
  padding: 28px 28px 48px;
  align-items: start;
}

.schedule-panel { min-width: 0; }

.week-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.week-range { font-weight: 700; font-size: 20px; letter-spacing: -.02em; }
.week-notes { display: flex; flex-wrap: wrap; gap: 6px; font-size: 12.5px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12.5px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
}
.pill.holiday { background: var(--ok-weak); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.pill.suspension { background: var(--warn-weak); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.pill.substitution { background: var(--primary-weak); color: var(--primary); border-color: color-mix(in srgb, var(--primary) 30%, transparent); }
.pill.event { background: var(--panel-2); }

.grid-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.grid {
  display: grid;
  grid-template-columns: 58px repeat(var(--days, 5), minmax(118px, 1fr));
  grid-template-rows: 46px repeat(10, minmax(64px, auto));
  gap: 6px;
  min-width: 660px;
  position: relative;
}

.grid-corner,
.grid-day,
.grid-period {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12.5px;
  color: var(--muted);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  border: 1px solid var(--border);
}

.grid-day {
  flex-direction: column;
  gap: 1px;
  font-weight: 600;
  color: var(--text);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.grid-day .day-date { font-size: 11px; font-weight: 400; color: var(--muted); font-variant-numeric: tabular-nums; }
.grid-day.is-today {
  background: var(--primary-weak);
  border-color: color-mix(in srgb, var(--primary) 55%, transparent);
  color: var(--primary);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary) 20%, transparent);
}
.grid-day.is-today .day-date { color: var(--primary); font-weight: 600; }
.grid-day.is-stop { background: var(--ok-weak); border-color: color-mix(in srgb, var(--ok) 40%, transparent); color: var(--ok); }
.grid-day.is-sub { background: var(--primary-weak); border-color: color-mix(in srgb, var(--primary) 45%, transparent); color: var(--primary); }

.grid-period {
  flex-direction: column;
  gap: 1px;
  line-height: 1.2;
}
.grid-period .p-name { font-weight: 600; color: var(--text); font-size: 12px; }
.grid-period .p-time { font-size: 11px; font-variant-numeric: tabular-nums; }
.grid-period.is-section-start { border-top: 2px solid var(--border-strong); }
/* 当前正在上的节次：整列时间标签高亮，一眼看到「现在第几节」 */
.grid-period.is-now {
  background: color-mix(in srgb, var(--primary) 12%, var(--panel));
  border-color: color-mix(in srgb, var(--primary) 50%, transparent);
  color: var(--primary);
  box-shadow: var(--ring);
}
.grid-period.is-now .p-name { color: var(--primary); }

.cell-bg {
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px dashed transparent;
  z-index: 0;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
/* 上午 / 下午 / 晚上 分界处：每格顶部加一条实线，使分隔线贯通整行 */
.cell-bg.is-section-start { border-top: 2px solid var(--border-strong); }
/* 当前正在上课的时段：整行格子加一层很淡的底色，引导视线 */
.cell-bg.is-now { background: color-mix(in srgb, var(--primary) 5%, transparent); }
.cell-bg:hover { background: color-mix(in srgb, var(--primary) 6%, transparent); border-color: color-mix(in srgb, var(--primary) 30%, transparent); }
.cell-bg.drop-active {
  border-color: var(--primary);
  background: var(--primary-weak);
  border-style: solid;
}

.course {
  z-index: 1;
  position: relative;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--c) 30%, transparent);
  border-left: 3px solid var(--c);
  background: color-mix(in srgb, var(--c) 8%, var(--panel));
  padding: 8px 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 0;
  transition: box-shadow .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);
  animation: cellIn .28s var(--ease-out) both;
}
@keyframes cellIn { from { opacity: 0; transform: translateY(6px) scale(.98); } to { opacity: 1; transform: none; } }
.course .c-head { display: flex; align-items: flex-start; gap: 5px; }
.course .c-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--c) 22%, var(--panel));
}
.course:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--c) 50%, transparent);
}
.course:active { transform: translateY(0); }
.course.draggable { cursor: grab; }
.course.dragging { opacity: .4; transform: scale(.97); }
.course .c-name {
  font-weight: 600;
  font-size: 12.5px;
  color: var(--text);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course .c-meta {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course .c-tag {
  position: absolute;
  top: 3px;
  right: 4px;
  font-size: 10px;
  padding: 0 5px;
  border-radius: 5px;
  background: var(--primary);
  color: #fff;
  line-height: 15px;
  font-weight: 600;
  box-shadow: 0 1px 3px color-mix(in srgb, var(--primary) 40%, transparent);
}
.course.origin-moved { border-style: dashed; }
.course.origin-added { border-style: dashed; border-left-style: solid; }
.course.conflict { outline: 2px solid var(--danger); outline-offset: -1px; box-shadow: 0 0 0 4px var(--danger-weak); }
/* 个人课程与班级课程使用不同边框体系；同时间提示不替代颜色区分。 */
.course.personal-course { border-left-width: 4px; }
.course.class-course { border-left-style: double; border-left-width: 5px; }
.course .c-tag.personal-tag { background: var(--primary); }
.course .concurrent-badge {
  position: absolute;
  right: 4px;
  bottom: 3px;
  padding: 0 5px;
  border-radius: 5px;
  background: var(--danger-weak);
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  font-size: 10px;
  font-weight: 600;
  line-height: 15px;
}

.course-empty {
  z-index: 1;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 11px;
  opacity: 0;
  transition: opacity .15s;
}
.course-empty:hover { opacity: 1; }

.hint { margin-top: 10px; font-size: 12.5px; }

/* ------------------------------ 侧栏 ------------------------------ */

.side-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 116px;
  max-height: calc(100vh - 136px);
  display: flex;
  flex-direction: column;
}
.tab-body { overflow-y: auto; margin-top: 18px; flex: 1; padding-right: 2px; }

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  background: var(--panel);
  margin-bottom: 10px;
  transition: box-shadow .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.card:hover { box-shadow: var(--shadow-sm); border-color: var(--border-strong); }
.card-title { font-weight: 600; font-size: 13px; display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.card-actions { display: flex; gap: 6px; margin-top: 9px; flex-wrap: wrap; }

.empty-state { text-align: center; color: var(--muted); font-size: 13px; padding: 26px 10px; }
.empty-state .big { font-size: 26px; display: block; margin-bottom: 6px; opacity: .6; }
.side-preview-note {
  padding: 8px 9px;
  border-radius: 7px;
  background: var(--warn-weak);
  border: 1px solid color-mix(in srgb, var(--warn) 34%, transparent);
  color: var(--text);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.4;
}
.preview-day-card .badge { flex: 0 0 auto; }

.section-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin: 14px 0 7px;
}
.section-title:first-child { margin-top: 2px; }

.todo-item {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  margin-bottom: 7px;
  background: var(--panel-2);
}
.todo-item.done { opacity: .55; }
.todo-item.done .todo-title { text-decoration: line-through; }
.todo-item input[type="checkbox"] { margin-top: 3px; }
.todo-main { flex: 1; min-width: 0; }
.todo-title { font-size: 13px; font-weight: 500; word-break: break-word; }
.todo-meta { font-size: 11.5px; color: var(--muted); margin-top: 2px; display: flex; gap: 8px; flex-wrap: wrap; }
.badge { display: inline-block; padding: 0 6px; border-radius: 4px; font-size: 11px; line-height: 16px; }
.badge.exam { background: var(--danger-weak); color: var(--danger); }
.badge.homework { background: var(--primary-weak); color: var(--primary); }
.badge.assignment { background: var(--ok-weak); color: var(--ok); }
.badge.overdue { background: var(--danger-weak); color: var(--danger); }
.todo-item.from-class { border-left: 3px solid color-mix(in srgb, var(--ok) 55%, transparent); }

.rule-item {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12.5px;
}
.rule-item:last-child { border-bottom: none; }
.rule-kind {
  flex-shrink: 0;
  width: 52px;
  text-align: center;
  border-radius: 4px;
  font-size: 11px;
  line-height: 17px;
  color: #fff;
}
.rule-kind.holiday { background: var(--ok); }
.rule-kind.suspension { background: var(--warn); }
.rule-kind.substitution { background: var(--primary); }
.rule-kind.event { background: var(--muted); }
.rule-date { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 11.5px; }
.rule-name { font-weight: 500; }
.rule-src { color: var(--muted); font-size: 11px; }

/* ------------------------------ 弹窗 ------------------------------ */

.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 22, 36, .5);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  animation: fade .18s var(--ease);
}
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }

.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 460px;
  max-height: min(88vh, 900px);
  display: flex;
  flex-direction: column;
  animation: pop .22s var(--ease-out);
}
@keyframes pop { from { transform: translateY(10px) scale(.97); opacity: .4 } to { transform: none; opacity: 1 } }

.modal-head {
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.modal-head h3 { margin: 0; font-size: 20px; line-height: 1.3; letter-spacing: -.02em; }
.modal-close {
  border: none; background: transparent; color: var(--muted);
  font-size: 20px; line-height: 1; padding: 2px 6px; border-radius: 6px;
}
.modal-close:hover { background: var(--panel-2); color: var(--text); }
.modal-body { padding: 22px 24px; overflow-y: auto; display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.modal-foot {
  padding: 16px 24px 22px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; }
.form-row.three { grid-template-columns: 1fr 1fr 1fr; }

.kv { display: grid; grid-template-columns: 62px 1fr; gap: 5px 10px; font-size: 13px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-word; }

.choice-list { display: flex; flex-direction: column; gap: 8px; }
.choice {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background: var(--panel-2);
  text-align: left;
  transition: border-color .15s, background .15s;
}
.choice:hover { border-color: var(--primary); background: var(--primary-weak); }
.choice-title { font-weight: 600; font-size: 13.5px; }
.choice-desc { font-size: 12px; color: var(--muted); margin-top: 2px; }

.warn-box {
  background: var(--warn-weak);
  border: 1px solid color-mix(in srgb, var(--warn) 35%, transparent);
  color: var(--warn);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  font-size: 12.5px;
}

/* ------------------------ 课程详情：归属与并发 ------------------------ */
.course-detail-section {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  padding: 10px;
}
.course-detail-section-title {
  color: var(--text);
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 8px;
}
.course-detail-caption,
.side-preview-rule {
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.55;
  margin-top: 7px;
}
.course-origin-card {
  border-radius: 7px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  background: var(--panel);
}
.course-origin-card.is-class { border-left-style: double; border-left-width: 5px; border-left-color: var(--ok); }
.course-origin-kicker { color: var(--muted); font-size: 11px; font-weight: 600; }
.course-origin-name { color: var(--text); font-size: 13px; font-weight: 700; margin-top: 2px; }
.course-origin-meta { color: var(--muted); font-size: 11.5px; margin-top: 3px; line-height: 1.45; }
.concurrent-list,
.remote-class-list { display: flex; flex-direction: column; gap: 7px; }
.concurrent-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--panel);
}
.concurrent-row.is-class { border-left: 4px double var(--ok); }
.concurrent-row.is-personal { border-left: 4px solid var(--primary); }
.concurrent-source {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  padding-top: 1px;
}
.concurrent-main { min-width: 0; }
.concurrent-name,
.remote-course-name { color: var(--text); font-size: 12.5px; font-weight: 650; }
.concurrent-meta,
.remote-course-meta { color: var(--muted); font-size: 11.5px; margin-top: 2px; line-height: 1.45; }
.remote-class-group {
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 8px 9px;
  background: var(--panel);
}
.remote-class-title { color: var(--primary); font-size: 12px; font-weight: 700; margin-bottom: 5px; }
.remote-course-row + .remote-course-row { border-top: 1px dashed var(--border); margin-top: 5px; padding-top: 5px; }
.empty-inline {
  color: var(--muted);
  background: var(--panel);
  border: 1px dashed var(--border);
  border-radius: 7px;
  padding: 9px;
  font-size: 12px;
  line-height: 1.45;
}

/* ------------------------------ Toast ------------------------------ */

.toast-root {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  pointer-events: none;
}
.toast {
  background: #253043;
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  box-shadow: var(--shadow);
  animation: toastIn .2s ease;
  max-width: 90vw;
}
.toast.error { background: #9f231b; color: #fff; }
.toast.ok { background: #176b32; color: #fff; }
@keyframes toastIn { from { transform: translateY(10px); opacity: 0 } to { transform: none; opacity: 1 } }

/* ------------------------------ 响应式 ------------------------------ */

@media (max-width: 1180px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .side-panel { position: static; max-height: none; }
}

@media (max-width: 1440px) and (min-width: 781px) {
  .topbar-center { order: 3; width: 100%; justify-content: center; }
  .topbar-right { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ------------------------------ 主题选择 ------------------------------ */

.theme-row { display: flex; flex-wrap: wrap; gap: 8px; }
.theme-swatch {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 11px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border); background: var(--panel-2);
  color: var(--text); font-size: 13px;
  transition: border-color .15s, box-shadow .15s;
}
.theme-swatch:hover { border-color: var(--border-strong); }
.theme-swatch.active { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-weak); }
.swatch-dot { width: 12px; height: 12px; border-radius: 50%; }
.swatch-label { font-weight: 500; }

/* ------------------------------ 移动端日视图（桌面端隐藏） ------------------------------ */

.mobile-daybar { display: none; }
.mobile-daylist { display: none; }

.day-pill {
  flex: 0 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  min-width: 56px; min-height: 48px; padding: 9px 6px; border-radius: 12px; cursor: pointer;
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  font-size: 13px; line-height: 1.1;
}
.day-pill.active { border-color: var(--primary); background: var(--primary-weak); color: var(--primary); font-weight: 600; }
.day-pill.is-today { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--primary) 40%, transparent); }
.dp-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--primary); }

.m-course { display: flex; flex-direction: column; gap: 4px; }
.m-time { font-size: 12px; color: var(--muted); font-weight: 500; }
.m-course .course { min-height: 56px; }
.m-empty { text-align: center; color: var(--muted); padding: 22px; border: 1px dashed var(--border); border-radius: var(--radius); }
.m-add { width: 100%; justify-content: center; margin-top: 2px; }

@media (max-width: 780px) {
  .topbar { padding: 12px 16px; gap: 12px; }
  .topbar-center { order: 3; width: 100%; justify-content: center; padding-top: 8px; border-top: 1px solid var(--border); }
  .topbar-right { order: 2; margin-left: auto; }
  .topbar-right .btn-ghost { padding: 6px 9px; font-size: 12.5px; }

  /* 窄屏：顶栏只留「更多」按钮 + 身份徽章，其余操作收进下拉菜单 */
  .topbar-more { display: inline-flex; }
  .topbar-right > .btn:not(.topbar-more),
  .topbar-actions,
  .topbar-divider { display: none; }

  .layout { padding: 18px 16px 32px; gap: 20px; }
  .user-nick { max-width: 76px; }
  .progress-strip { padding: 7px 12px; }
  .form-row, .form-row.three { grid-template-columns: 1fr; }

  /* 移动端：隐藏六列网格，改用「星期切换 + 当天课程列表」 */
  .grid-wrap { display: none; }
  .mobile-daybar {
    display: flex; gap: 7px; overflow-x: auto; padding: 2px;
    -webkit-overflow-scrolling: touch; margin-bottom: 10px;
  }
  .mobile-daylist { display: flex; flex-direction: column; gap: 12px; }
  .schedule-panel .hint { display: none; }
  .m-course { padding: 14px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
  .m-course .course { min-height: 64px; }
  .m-course .m-move { align-self: flex-start; }
  .side-panel { padding: 16px; }
  .week-range { font-size: 18px; }
}

/* ------------------------------ 通用输入（select 等直接带 .field-input） ------------------------------ */

.field-input {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  min-height: 44px;
  outline: none;
  width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
.field-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-weak); }

/* ------------------------------ 角色徽章 ------------------------------ */

.role-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}
.role-badge.role-student { display: none; background: var(--panel-2); color: var(--muted); border-color: var(--border); }
.role-badge.role-student.hidden { display: none; }
.role-badge.role-committee { background: var(--primary-weak); color: var(--primary); border-color: color-mix(in srgb, var(--primary) 35%, transparent); }
.role-badge.role-teacher { background: var(--ok-weak); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 35%, transparent); }
.role-badge.role-admin { background: linear-gradient(135deg, color-mix(in srgb, var(--warn) 85%, #fff), var(--warn)); color: #fff; border-color: transparent; box-shadow: 0 2px 8px color-mix(in srgb, var(--warn) 35%, transparent); }

/* ------------------------------ 班级下发 / 超管预览 / 系统公告横幅 ------------------------------ */

.class-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 18px 0;
  padding: 10px 14px;
  background: var(--primary-weak);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.banner-info { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }
.banner-title { font-weight: 600; font-size: 14px; color: var(--text); }
.banner-sub { font-size: 12px; color: var(--muted); }
.banner-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.banner-mode { width: auto; min-width: 168px; }

/* 超管查看其他班级的只读预览提示 */
.preview-banner,
.announce-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 10px 18px 0;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}
.preview-banner {
  background: var(--warn-weak);
  border: 1px solid color-mix(in srgb, var(--warn) 36%, transparent);
  color: var(--text);
}
.announce-banner {
  background: var(--primary-weak);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
}
.announce-text { min-width: 0; word-break: break-word; }
.announce-close { margin-left: auto; flex: 0 0 auto; }

/* 超管班级视图下拉，放在标题下方，不干扰周次切换 */
.view-class-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 5px;
  font-size: 11.5px;
}
.view-class-select { width: auto; min-width: 150px; max-width: 250px; padding: 4px 7px; font-size: 12px; }

/* 班级下发的课程（只读层） */
.course.from-class { border-left-style: double; border-left-width: 5px; }
.course .c-tag.class-tag { background: var(--ok); }

/* ------------------------------ 下发 / 导入 弹窗 ------------------------------ */

.drop-zone {
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  background: var(--panel-2);
}
.drop-zone p { margin: 0 0 8px; color: var(--muted); font-size: 13px; }

.preview-box { display: flex; flex-direction: column; gap: 8px; max-height: 320px; overflow-y: auto; }

/* ---------------- 批量导入结果清单 ---------------- */
.batch-status { font-size: 13px; line-height: 1.6; padding: 6px 0; }
.batch-results { display: flex; flex-direction: column; gap: 4px; max-height: 46vh; overflow-y: auto; }
.batch-row {
  display: grid;
  grid-template-columns: 1fr 64px 190px;
  gap: 10px;
  align-items: center;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--muted);
  border-radius: 8px;
  background: var(--panel-2);
}
.batch-row.ok { border-left-color: #2e9e5b; }
.batch-row.warn { border-left-color: #d99513; }
.batch-row.error { border-left-color: var(--danger, #e5484d); background: rgba(229, 72, 77, .07); }
.batch-row .b-title { font-size: 13.5px; word-break: break-all; }
.batch-row .b-sub { font-size: 12px; margin-top: 2px; word-break: break-all; }
.batch-row .b-num { font-size: 12.5px; color: var(--muted); text-align: center; }
.batch-row .b-act { font-size: 12.5px; color: var(--muted); text-align: right; }
.batch-issues { margin: -2px 0 6px; padding: 6px 10px 6px 22px; }
.batch-issues .bi-item { font-size: 12px; color: var(--muted); line-height: 1.7; }
.btn.is-busy { opacity: .6; pointer-events: none; }

@media (max-width: 780px) {
  /* 手机端：结果行改为两行布局，避免文字被压扁 */
  .batch-row { grid-template-columns: 1fr auto; grid-template-areas: 'main num' 'act act'; row-gap: 4px; }
  .batch-row .b-main { grid-area: main; }
  .batch-row .b-num { grid-area: num; }
  .batch-row .b-act { grid-area: act; text-align: left; }
  .batch-results { max-height: 50vh; }
}
.preview-meta { font-size: 13.5px; }
.preview-count { font-size: 12.5px; color: var(--muted); }
.preview-list { display: flex; flex-direction: column; gap: 5px; }
.preview-item {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  font-size: 12.5px;
}
.pi-day { font-weight: 600; color: var(--primary); }
.pi-name { font-weight: 500; }
.pi-meta { color: var(--muted); font-size: 11.5px; }
.pi-week { color: var(--muted); font-size: 11.5px; text-align: right; grid-column: 1 / -1; }

/* ------------------------------ 超级管理员面板 ------------------------------ */

.admin-list { display: flex; flex-direction: column; gap: 9px; }

/* 管理面板顶部工具条：注册开关 / 全选 / 批量删除 */
.admin-panel { display: flex; flex-direction: column; gap: 12px; }
.admin-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
}
.admin-toolbar .toolbar-spacer { flex: 1; }
.ck-label { display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.ck-label input[type='checkbox'] { accent-color: var(--primary); }
.ck-switch { font-size: 13px; color: var(--text); font-weight: 500; }
.btn-danger-ghost { color: var(--danger); }
.btn-danger-ghost:hover { background: var(--danger-weak); border-color: color-mix(in srgb, var(--danger) 35%, transparent); }
.btn-danger-ghost:disabled { color: var(--muted); opacity: .5; }

/* ------------------------------ 审计日志 ------------------------------ */
.audit-panel { display: flex; flex-direction: column; gap: 10px; }
.audit-filters { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.audit-filters .field-input { width: auto; min-width: 100px; }
.audit-filters input[type='date'] { min-width: 130px; }
.audit-summary { font-size: 12.5px; }

.audit-table { display: flex; flex-direction: column; gap: 3px; max-height: 52vh; overflow-y: auto; }
.audit-tr {
  display: grid;
  grid-template-columns: 128px 90px 110px 96px 56px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  font-size: 12.5px;
}
.audit-tr > span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.audit-tr.audit-th {
  background: transparent;
  border: 0;
  font-weight: 600;
  color: var(--muted);
  font-size: 12px;
  position: sticky;
  top: 0;
}
.audit-time { color: var(--muted); font-variant-numeric: tabular-nums; }
.audit-ip { color: var(--muted); font-family: ui-monospace, Consolas, monospace; font-size: 12px; }
.audit-op {
  display: inline-block;
  padding: 0 7px;
  border-radius: 999px;
  background: var(--primary-weak);
  color: var(--primary);
  font-size: 11.5px;
  line-height: 18px;
  font-weight: 500;
}
.audit-ok { color: var(--ok); }
.audit-err { color: var(--danger); font-weight: 600; }
.audit-detail { color: var(--muted); }

.audit-pager { display: flex; align-items: center; gap: 12px; justify-content: center; }
.audit-pager .btn:disabled { opacity: .45; }

/* 非正常状态徽章：封禁 / 禁用 */
.au-name-line { display: flex; align-items: center; gap: 6px; font-weight: 600; font-size: 13.5px; }
.au-status {
  font-size: 10.5px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 999px;
  line-height: 16px;
  white-space: nowrap;
}
.au-status-banned { background: var(--danger-weak); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); }
.au-status-disabled { background: var(--warn-weak); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); }
.admin-row.is-suspended { opacity: .68; }
.admin-row.is-suspended .au-name-line { color: var(--muted); }

.admin-row {
  /* 两行布局：首行 勾选框 + 用户身份；次行 角色/状态/权限/班级代码/操作 */
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 6px 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
}
.admin-user { min-width: 0; }
.admin-ctrl { grid-column: 1 / -1; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.admin-ctrl .field-input { width: auto; min-width: 110px; }
.admin-ctrl input.field-input { min-width: 96px; }

/* 管理中心：用户 / 系统设置 / 班级与课表 */
.admin-tabs { margin-bottom: 2px; overflow-x: auto; flex-wrap: nowrap; }
.admin-tabs .tab { flex: 1 0 auto; }
.admin-tab-panel { display: flex; flex-direction: column; gap: 10px; }
.admin-settings-tip { font-size: 12.5px; padding: 2px 1px; }
.setting-row {
  display: grid;
  grid-template-columns: minmax(180px, .8fr) minmax(0, 1.4fr);
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.setting-label { font-size: 13px; font-weight: 600; color: var(--text); }
.setting-desc { display: block; font-size: 12px; line-height: 1.45; }
.setting-anno { align-items: end; }
.setting-anno-main { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.anno-input { resize: vertical; min-height: 68px; }
.setting-number-row { align-items: center; }
.setting-number-ctrl { display: flex; align-items: center; gap: 8px; min-width: 0; }
.setting-number { width: 100px; flex: 0 0 100px; padding: 7px 9px; }
.setting-readonly {
  padding: 10px 12px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--panel-2) 65%, transparent);
}
.class-row { grid-template-columns: minmax(0, 1fr); }
.class-row .admin-ctrl { justify-content: flex-end; }
.class-meta { margin-right: auto; font-size: 12px; }

/* 班级课表编辑器 */
.class-editor { display: flex; flex-direction: column; gap: 12px; }
.class-editor-sub { font-size: 12.5px; }
.class-edit-table { display: flex; flex-direction: column; gap: 5px; max-height: 54vh; overflow: auto; padding-bottom: 2px; }
.ce-row {
  display: grid;
  grid-template-columns: 74px 66px 66px minmax(115px, 1.4fr) minmax(92px, 1fr) minmax(92px, 1fr) minmax(82px, .9fr) 42px;
  gap: 6px;
  align-items: center;
  min-width: 700px;
}
.ce-row .field-input { padding: 7px 8px; min-width: 0; }
.ce-row.ce-head {
  position: sticky;
  top: 0;
  z-index: 1;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 2px;
  background: var(--panel);
}
.ce-row:not(.ce-head) { padding: 5px; border: 1px solid var(--border); background: var(--panel-2); border-radius: var(--radius-sm); }

/* 超级管理员批量排课 */
.batch-schedule-target-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.batch-schedule-selected { flex: 1; min-width: 0; font-size: 12px; line-height: 1.5; word-break: break-word; }
.batch-schedule-target-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  max-height: 220px;
  overflow-y: auto;
  padding: 2px;
}
.batch-schedule-target {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  cursor: pointer;
}
.batch-schedule-target:hover { border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); }
.batch-schedule-target input { margin-top: 3px; accent-color: var(--primary); }
.batch-schedule-target-main { min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.batch-schedule-target-main strong { font-size: 13px; word-break: break-word; }
.batch-schedule-target-main .muted { font-size: 11.5px; line-height: 1.35; word-break: break-word; }
.batch-schedule-detail, .batch-schedule-source { display: flex; flex-direction: column; gap: 10px; }
.batch-schedule-section-title { font-size: 12.5px; font-weight: 600; color: var(--text); }
.batch-course-form { display: flex; flex-direction: column; gap: 8px; padding: 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--panel-2); }
.batch-schedule-preview-list { display: flex; flex-direction: column; gap: 8px; max-height: 52vh; overflow-y: auto; }
.batch-schedule-preview-item { padding: 10px 12px; border: 1px solid var(--border); border-left: 3px solid var(--primary); border-radius: var(--radius-sm); background: var(--panel-2); }
.batch-schedule-preview-title { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; }
.batch-schedule-preview-type { margin-top: 5px; font-size: 12.5px; font-weight: 600; color: var(--primary); }
.batch-schedule-preview-change { display: grid; grid-template-columns: 58px minmax(0, 1fr); gap: 3px 8px; margin: 7px 0; font-size: 12px; line-height: 1.45; word-break: break-word; }
.batch-schedule-note { padding: 8px 10px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--panel-2); font-size: 12.5px; word-break: break-word; }

/* 班级课表版本历史 */
.class-version-summary { font-size: 12.5px; }
.class-version-list { display: flex; flex-direction: column; gap: 8px; max-height: 56vh; overflow-y: auto; }
.class-version-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
}
.class-version-item.is-current { border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); box-shadow: inset 3px 0 0 var(--primary); }
.class-version-main { min-width: 0; flex: 1; display: flex; flex-direction: column; gap: 3px; }
.class-version-title { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; font-size: 13px; font-weight: 600; }
.version-badge { background: var(--primary-weak); color: var(--primary); }
.class-version-meta, .class-version-note { font-size: 12px; line-height: 1.45; word-break: break-word; }
.class-version-note { color: var(--text); }
.class-version-actions { flex: 0 0 auto; }
.version-detail-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 13px; font-weight: 600; }
.version-detail-note { font-size: 12px; line-height: 1.5; word-break: break-word; }
.version-detail-count { font-size: 12.5px; font-weight: 600; }
.version-course-list { display: flex; flex-direction: column; gap: 5px; max-height: 46vh; overflow-y: auto; }
.version-course-row {
  display: grid;
  grid-template-columns: 130px minmax(110px, 1fr) minmax(160px, 1.5fr);
  gap: 9px;
  align-items: center;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  font-size: 12.5px;
}
.version-course-time { color: var(--primary); font-weight: 600; }
.version-course-name { font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.version-course-meta { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 调课申请与通知中心 */
.request-list, .notification-list { display: flex; flex-direction: column; gap: 8px; max-height: 52vh; overflow-y: auto; }
.request-summary, .notification-summary { font-size: 12.5px; }
.request-filters, .notification-toolbar, .request-pager, .notification-pager { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.request-pager, .notification-pager { justify-content: center; }
.request-item, .notification-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
}
.request-item.status-pending { border-left: 3px solid var(--warn); }
.request-item.status-approved { border-left: 3px solid var(--ok); }
.request-item.status-rejected, .request-item.status-withdrawn { border-left: 3px solid var(--danger); }
.request-item.status-invalidated { border-left: 3px solid var(--muted); }
.request-main, .notification-main { min-width: 0; flex: 1; }
.request-title, .notification-title { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; font-weight: 600; font-size: 13px; }
.request-status.pending { background: var(--warn-weak); color: var(--warn); }
.request-status.approved { background: var(--ok-weak); color: var(--ok); }
.request-status.rejected, .request-status.withdrawn { background: var(--danger-weak); color: var(--danger); }
.request-status.invalidated { background: var(--panel-2); color: var(--muted); }
.request-detail, .request-meta, .request-review, .notification-content, .notification-time { margin-top: 4px; font-size: 12px; line-height: 1.45; word-break: break-word; }
.request-review { color: var(--text); }
.request-actions, .notification-actions { flex: 0 0 auto; display: flex; gap: 7px; flex-wrap: wrap; justify-content: flex-end; }
.notification-item.is-unread { border-left: 3px solid var(--primary); background: color-mix(in srgb, var(--primary-weak) 45%, var(--panel-2)); }
.notification-type { background: var(--primary-weak); color: var(--primary); }
.notification-count { display: inline-flex; align-items: center; justify-content: center; min-width: 17px; height: 17px; padding: 0 4px; margin-left: 4px; border-radius: 999px; background: var(--danger); color: #fff; font-size: 10px; line-height: 17px; }

/* ------------------------------ 移动端补充 ------------------------------ */

@media (max-width: 780px) {
  .class-banner, .preview-banner, .announce-banner { margin: 10px 12px 0; }
  .banner-mode { min-width: 140px; flex: 1; }
  .view-class-row { width: min(100%, 260px); }
  .view-class-select { max-width: calc(100vw - 115px); flex: 1; }
  .admin-ctrl .field-input { min-width: 0; flex: 1 1 40%; }
  .setting-row { grid-template-columns: 1fr; gap: 8px; }
  .setting-anno { align-items: stretch; }
  .setting-number-ctrl { justify-content: flex-start; }
  .class-row .admin-ctrl { justify-content: flex-start; }
  .class-meta { width: 100%; }
  .class-edit-table { max-height: 50vh; }
  .batch-schedule-target-list { grid-template-columns: 1fr; max-height: 280px; }
  .batch-schedule-target-head { flex-direction: column; gap: 5px; }
  .batch-schedule-preview-change { grid-template-columns: 1fr; gap: 2px; }
  .class-version-item, .request-item, .notification-item { align-items: stretch; flex-direction: column; gap: 8px; }
  .class-version-actions, .request-actions, .notification-actions { justify-content: flex-start; }
  .version-course-row { grid-template-columns: 1fr; gap: 3px; }
  .version-course-name, .version-course-meta { white-space: normal; overflow: visible; text-overflow: clip; }
  .request-filters .field-input { width: 100%; }
  .modal-mask { padding: 12px; align-items: center; }
  .modal { max-height: calc(100dvh - 24px); }
  .modal-foot .btn { min-height: 44px; }
  .audit-table { overflow-x: auto; }
  .audit-tr { min-width: 620px; }
  .more-menu { max-height: min(70dvh, 560px); overflow-y: auto; }
}

/* 超窄屏（≤390px）：进一步收紧，保证单手可用 */
@media (max-width: 390px) {
  .topbar { padding: 8px 10px; gap: 8px; }
  .app-title { font-size: 13.5px; }
  .app-sub { font-size: 11px; }
  .topbar-center { gap: 4px; }
  .btn-icon { width: 38px; height: 38px; font-size: 18px; }
  .week-current { padding: 7px 10px; font-size: 12.5px; min-width: 76px; }
  .layout { padding: 10px; gap: 10px; }
  .progress-strip { padding: 7px 10px; gap: 8px; }
  .progress-text { font-size: 11.5px; }
  .m-course .course { min-height: 50px; padding: 7px 9px; }
  .day-pill { min-width: 48px; padding: 8px 3px; font-size: 12px; }
  .modal { border-radius: 18px; }
  .auth-card { padding: 28px 22px; }
  .topbar-identity { max-width: 90px; }
  .role-badge { padding: 4px 7px; font-size: 11px; }
  .modal-head, .modal-body, .modal-foot { padding-left: 14px; padding-right: 14px; }
}

/* ======================================================================
   2026 UI refresh
   目标：克制的蓝灰基底、明确的内容层级、统一的控件语言、舒适的移动端密度。
   仅覆盖视觉层，不改变现有 DOM ID、接口或交互行为。
   ====================================================================== */

:root {
  --bg: #f3f6fb;
  --panel: #ffffff;
  --panel-2: #f7f9fc;
  --text: #162336;
  --muted: #65758a;
  --border: #dfe7f1;
  --border-strong: #c6d3e2;
  --primary: var(--theme-primary, #3568d4);
  --primary-strong: color-mix(in srgb, var(--primary) 82%, #102d72);
  --primary-weak: var(--theme-primary-weak, #edf3ff);
  --accent: #0f9f83;
  --danger: #c5414a;
  --danger-weak: #fff0f1;
  --warn: #a56b16;
  --warn-weak: #fff7e7;
  --ok: #16825f;
  --ok-weak: #eaf8f2;
  --shadow-sm: 0 2px 8px rgba(31, 54, 88, .06);
  --shadow: 0 12px 30px rgba(31, 54, 88, .09);
  --shadow-lg: 0 24px 70px rgba(24, 42, 69, .20);
  --radius: 16px;
  --radius-sm: 11px;
  --radius-lg: 24px;
  --ring: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101722;
    --panel: #172131;
    --panel-2: #1d2a3c;
    --text: #edf3fb;
    --muted: #9aacbf;
    --border: #2b3b50;
    --border-strong: #40546c;
    --primary: var(--theme-primary-dark, #78a1ff);
    --primary-strong: color-mix(in srgb, var(--primary) 82%, #dce8ff);
    --primary-weak: var(--theme-primary-weak-dark, #203252);
    --accent: #42c9aa;
    --danger: #ff7c86;
    --danger-weak: #3b232d;
    --warn: #f4bc63;
    --warn-weak: #3b301f;
    --ok: #58d4a8;
    --ok-weak: #1d3b35;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .22);
    --shadow: 0 16px 34px rgba(0, 0, 0, .25);
    --shadow-lg: 0 24px 70px rgba(0, 0, 0, .45);
  }
}

html { background: var(--bg); }
body {
  background:
    radial-gradient(circle at 8% -8%, color-mix(in srgb, var(--primary) 9%, transparent), transparent 34rem),
    radial-gradient(circle at 92% 0%, color-mix(in srgb, var(--accent) 5%, transparent), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-size: 14px;
  letter-spacing: .005em;
}

::selection { background: color-mix(in srgb, var(--primary) 24%, transparent); }

button, input, select, textarea { font: inherit; }
button:disabled { filter: saturate(.7); }

.btn {
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 11px;
  font-weight: 600;
  letter-spacing: .005em;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease), transform .12s var(--ease);
}
.btn:hover { background: var(--panel-2); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  box-shadow: 0 5px 14px color-mix(in srgb, var(--primary) 22%, transparent);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-strong), var(--primary));
  box-shadow: 0 8px 20px color-mix(in srgb, var(--primary) 28%, transparent);
}
.btn-ghost { background: color-mix(in srgb, var(--panel) 88%, var(--panel-2)); }
.btn-ghost:hover { background: var(--primary-weak); border-color: color-mix(in srgb, var(--primary) 34%, var(--border-strong)); color: var(--primary); }
.btn-danger { border-color: color-mix(in srgb, var(--danger) 48%, var(--border)); background: var(--danger-weak); }
.btn-danger:hover { border-color: var(--danger); background: color-mix(in srgb, var(--danger) 12%, var(--danger-weak)); }
.btn-icon { width: 40px; height: 40px; border-radius: 11px; font-size: 20px; }
.btn-block { min-height: 46px; border-radius: 12px; }

.tabs {
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: color-mix(in srgb, var(--panel-2) 88%, var(--panel));
}
.tab {
  flex: 1 1 0;
  border: 0;
  border-radius: 10px;
  padding: 9px 14px;
  color: var(--muted);
  font-weight: 600;
  transition: background .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease);
}
.tab:hover { background: color-mix(in srgb, var(--panel) 65%, transparent); color: var(--text); }
.tab.active {
  border: 0;
  background: var(--panel);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.auth {
  min-height: 100dvh;
  padding: 28px 20px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--primary) 8%, transparent), transparent 46%),
    radial-gradient(circle at 85% 12%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 23rem),
    var(--bg);
}
.auth-card {
  max-width: 432px;
  padding: 38px 38px 34px;
  border: 1px solid color-mix(in srgb, var(--border-strong) 64%, transparent);
  border-radius: 26px;
  box-shadow: 0 22px 60px rgba(42, 69, 108, .12);
}
.auth-brand { margin-bottom: 20px; }
.auth-brand h1 { font-size: 27px; letter-spacing: -.035em; }
.auth-form { gap: 15px; margin-top: 18px; }
.field { gap: 7px; }
.field-label { font-size: 12.5px; font-weight: 700; }
.field input, .field select, .field textarea, .field-input {
  min-height: 45px;
  padding: 11px 13px;
  border-radius: 11px;
  border-color: var(--border);
  background: color-mix(in srgb, var(--panel) 92%, var(--panel-2));
}
.field input::placeholder, .field textarea::placeholder, .field-input::placeholder { color: color-mix(in srgb, var(--muted) 70%, transparent); }
.field input:focus, .field select:focus, .field textarea:focus, .field-input:focus { box-shadow: var(--ring); }
.error { padding: 10px 12px; border-radius: 11px; line-height: 1.5; }

.topbar {
  display: grid;
  grid-template-columns: minmax(255px, 1fr) auto minmax(0, auto);
  align-items: center;
  min-height: 78px;
  gap: 16px;
  padding: 14px 30px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 86%, transparent);
  box-shadow: 0 4px 18px rgba(33, 55, 90, .04);
}
.topbar-left { position: relative; gap: 12px; min-width: 0; }
.topbar-center { margin: 0; white-space: nowrap; }
.topbar-right { margin: 0; min-width: 0; justify-content: flex-end; }
.topbar-actions { flex-wrap: nowrap; }
.topbar-title { gap: 1px; }
.app-title { font-size: 18px; letter-spacing: -.03em; }
.app-sub { font-size: 11.5px; }
.topbar-center { gap: 7px; }
.topbar-right { gap: 7px; }
.topbar-actions { gap: 6px; }
.topbar-actions .btn { min-height: 38px; padding-inline: 12px; font-size: 12.5px; }
.topbar-divider { height: 24px; }
.topbar-identity { padding-left: 3px; }
.user-nick { font-weight: 650; }
.week-current { min-width: 112px; min-height: 40px; border-radius: 11px; font-size: 13px; color: var(--text); }
.countdown { margin-top: 5px; padding: 4px 9px; border: 0; background: var(--primary-weak); color: var(--primary); font-size: 11px; }
.countdown strong { color: inherit; }

.progress-strip {
  gap: 14px;
  padding: 10px 30px;
  background: transparent;
  border-bottom: 0;
}
.progress-bar { height: 6px; border: 0; background: color-mix(in srgb, var(--border) 65%, transparent); }
.progress-fill { background: linear-gradient(90deg, var(--primary), var(--accent)); box-shadow: 0 0 12px color-mix(in srgb, var(--primary) 28%, transparent); }
.progress-text { font-size: 11.5px; font-weight: 600; }

.layout {
  grid-template-columns: minmax(0, 1fr) 356px;
  gap: 22px;
  max-width: 1600px;
  padding: 18px 30px 48px;
}
.week-head { margin: 0 4px 14px; }
.week-range { font-size: 21px; letter-spacing: -.035em; }
.week-notes { gap: 7px; }
.pill { padding: 4px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 650; }
.grid-wrap {
  padding: 14px;
  border-radius: 19px;
  border-color: color-mix(in srgb, var(--border-strong) 65%, var(--border));
  box-shadow: var(--shadow);
}
.grid { gap: 5px; grid-template-rows: 48px repeat(10, minmax(67px, auto)); }
.grid-corner, .grid-day, .grid-period { border-radius: 11px; }
.grid-corner, .grid-period { background: color-mix(in srgb, var(--panel-2) 82%, var(--panel)); }
.grid-day { background: var(--panel-2); }
.grid-day.is-today { background: var(--primary-weak); box-shadow: inset 0 -3px 0 var(--primary); }
.grid-period.is-now { box-shadow: var(--ring); }
.cell-bg:hover { background: color-mix(in srgb, var(--primary) 7%, transparent); }
.course {
  border-radius: 12px;
  padding: 9px 10px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--c) 12%, var(--panel)), color-mix(in srgb, var(--c) 5%, var(--panel)));
  box-shadow: 0 3px 10px color-mix(in srgb, var(--c) 8%, transparent);
}
.course:hover { box-shadow: 0 10px 20px color-mix(in srgb, var(--c) 15%, transparent); }
.course .c-name { font-size: 12.5px; font-weight: 700; }
.course .c-meta { font-size: 11px; }
.course .c-tag { top: 5px; right: 5px; border-radius: 6px; line-height: 16px; }
.hint { margin: 11px 5px 0; font-size: 11.5px; }

.side-panel {
  padding: 16px;
  border-radius: 19px;
  border-color: color-mix(in srgb, var(--border-strong) 65%, var(--border));
  box-shadow: var(--shadow);
}
.tab-body { margin-top: 16px; padding-right: 1px; }
.card {
  padding: 14px;
  border-radius: 13px;
  background: color-mix(in srgb, var(--panel) 88%, var(--panel-2));
  box-shadow: 0 2px 8px rgba(31, 54, 88, .035);
}
.card:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.card-title { font-size: 13px; font-weight: 700; }
.card-sub { line-height: 1.5; }
.section-title { margin-top: 17px; font-size: 10.5px; letter-spacing: .13em; color: var(--primary); }
.todo-item, .rule-item, .choice, .batch-row, .preview-item, .admin-row, .setting-row, .request-item, .notification-item {
  border-radius: 12px;
}
.todo-item { padding: 10px 11px; background: var(--panel-2); }
.todo-title { font-weight: 650; }
.badge { padding: 2px 7px; border-radius: 999px; line-height: 16px; font-weight: 650; }
.rule-item { padding: 9px 0; }

.modal-mask { background: rgba(16, 28, 45, .56); backdrop-filter: blur(7px); -webkit-backdrop-filter: blur(7px); }
.modal { border-radius: 22px; border-color: color-mix(in srgb, var(--border-strong) 70%, var(--border)); }
.modal-head { padding: 21px 24px 17px; }
.modal-head h3 { font-size: 19px; }
.modal-body { padding: 20px 24px; gap: 15px; }
.modal-foot { padding: 14px 24px 20px; background: color-mix(in srgb, var(--panel-2) 55%, transparent); }
.warn-box, .side-preview-note { border-radius: 11px; padding: 10px 12px; }
.drop-zone { border-radius: 14px; padding: 20px 16px; background: var(--panel-2); }

.class-banner, .preview-banner, .announce-banner { border-radius: 14px; box-shadow: var(--shadow-sm); }
.class-banner { margin: 12px 30px 0; padding: 11px 14px; }
.preview-banner, .announce-banner { margin: 10px 30px 0; padding: 10px 14px; }
.preview-banner { background: var(--warn-weak); }
.announce-banner { background: var(--primary-weak); }

.role-badge { border-radius: 8px; padding: 4px 9px; box-shadow: none; }
.role-badge.role-admin { border-radius: 8px; }
.view-class-select { border-radius: 8px; }
.theme-swatch { border-radius: 10px; }
.toast { border-radius: 11px; box-shadow: var(--shadow); font-weight: 600; }

@media (max-width: 1640px) {
  .topbar { grid-template-columns: minmax(240px, 1fr) auto; row-gap: 10px; }
  .topbar-left { grid-column: 1; grid-row: 1; }
  .topbar-right { grid-column: 2; grid-row: 1; }
  .topbar-center { grid-column: 1 / -1; grid-row: 2; justify-content: center; padding-top: 9px; border-top: 1px solid var(--border); }
}

@media (max-width: 1180px) {
  .layout { gap: 18px; }
  .side-panel { position: static; }
}

@media (max-width: 780px) {
  .topbar { grid-template-columns: minmax(0, 1fr) auto; min-height: 72px; padding: 12px 16px; gap: 10px; }
  .topbar-left, .topbar-title { display: contents; }
  .topbar-right {
    grid-column: 2;
    grid-row: 1 / 3;
    gap: 8px;
    align-items: center;
    flex-wrap: nowrap;
    position: static;
  }
  .topbar-more {
    width: 40px;
    height: 40px;
    padding: 0;
    align-items: center;
    justify-content: center;
    flex: 0 0 40px;
  }
  .topbar-identity {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    min-width: 0;
    max-width: 90px;
    padding-left: 0;
  }
  .user-nick { max-width: 90px; }
  .role-badge.role-student { display: inline-flex; }
  .topbar-center { grid-column: 1 / -1; grid-row: 6; }
  .app-title, .app-sub {
    grid-column: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .app-title { grid-row: 1; }
  .app-sub { grid-row: 2; }
  .countdown {
    grid-column: 1 / -1;
    grid-row: 3;
    display: block;
    width: 100%;
    max-width: none;
    margin-top: 8px;
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
    overflow-wrap: anywhere;
    line-height: 1.5;
    border-radius: 11px;
  }
  .view-class-row { grid-column: 1 / -1; grid-row: 4; }
  .more-menu {
    grid-column: 1 / -1;
    grid-row: 3;
    position: static;
    width: 100%;
    min-width: 0;
    max-width: none;
    max-height: min(38dvh, 280px);
    overflow-y: auto;
    overscroll-behavior: contain;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-content: start;
    gap: 4px;
    padding: 8px;
    margin-top: 2px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
  }
  .topbar:has(.more-menu:not(.hidden)) .countdown { grid-row: 4; }
  .topbar:has(.more-menu:not(.hidden)) .view-class-row { grid-row: 5; }
  .more-item { width: 100%; min-width: 0; min-height: 42px; padding: 9px 10px; }
  .more-item:last-child { grid-column: 1 / -1; border-top: 1px solid var(--border); border-radius: 0 0 7px 7px; }
  .topbar-right .btn-ghost { border-radius: 10px; }
  .topbar-right .topbar-more { padding: 0; }
  .topbar-more[aria-expanded="true"] { background: var(--primary-weak); color: var(--primary); }
  .layout { grid-template-columns: minmax(0, 1fr); padding: 14px 14px 32px; gap: 16px; }
  .schedule-panel, .side-panel { min-width: 0; }
  .progress-strip { padding: 8px 14px; }
  .week-head { margin: 0 1px 12px; }
  .week-range { font-size: 18px; }
  .mobile-daybar { gap: 6px; padding: 3px 1px 7px; }
  .day-pill { min-height: 50px; border-radius: 12px; background: var(--panel); box-shadow: var(--shadow-sm); }
  .mobile-daylist { gap: 10px; }
  .m-course { padding: 13px; border-radius: 15px; box-shadow: var(--shadow-sm); }
  .m-course .course { border-radius: 11px; box-shadow: none; }
  .side-panel { padding: 14px; border-radius: 16px; }
  .class-banner, .preview-banner, .announce-banner { margin: 9px 14px 0; }
  .modal-mask { padding: 10px; }
  .modal { border-radius: 20px; max-height: calc(100dvh - 20px); }
}

@media (max-width: 390px) {
  .auth { padding: 16px 12px; }
  .auth-card { padding: 30px 20px 24px; border-radius: 22px; }
  .auth-brand h1 { font-size: 24px; }
  .topbar { padding: 9px 11px; }
  .app-title { font-size: 14px; }
  .app-sub { font-size: 10.5px; }
  .layout { padding: 11px 10px 26px; }
  .progress-strip { padding-inline: 10px; }
}

/* 放在视觉刷新块之后，确保系统暗色模式优先于浅色主题默认值。 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101722;
    --panel: #172131;
    --panel-2: #1d2a3c;
    --text: #edf3fb;
    --muted: #9aacbf;
    --border: #2b3b50;
    --border-strong: #40546c;
    --primary: var(--theme-primary-dark, #78a1ff);
    --primary-strong: color-mix(in srgb, var(--primary) 82%, #dce8ff);
    --primary-weak: var(--theme-primary-weak-dark, #203252);
    --danger: #ff7c86;
    --danger-weak: #3b232d;
    --warn: #f4bc63;
    --warn-weak: #3b301f;
    --ok: #58d4a8;
    --ok-weak: #1d3b35;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .22);
    --shadow: 0 16px 34px rgba(0, 0, 0, .25);
    --shadow-lg: 0 24px 70px rgba(0, 0, 0, .45);
  }
  .btn-primary { color: #0c213b; }
  .auth-card { box-shadow: var(--shadow-lg); }
}

@media (max-width: 780px) {
  .auth { min-height: 100dvh; padding-top: max(16px, env(safe-area-inset-top)); padding-bottom: max(16px, env(safe-area-inset-bottom)); }
  .auth-card { margin: auto 0; }
  .topbar { padding-left: max(16px, env(safe-area-inset-left)); padding-right: max(16px, env(safe-area-inset-right)); }
  .layout { padding-left: max(14px, env(safe-area-inset-left)); padding-right: max(14px, env(safe-area-inset-right)); }
  .progress-strip { padding-bottom: max(8px, env(safe-area-inset-bottom)); }
}

@media (max-width: 390px) {
  .topbar { padding-left: max(11px, env(safe-area-inset-left)); padding-right: max(11px, env(safe-area-inset-right)); }
  .layout { padding-left: max(10px, env(safe-area-inset-left)); padding-right: max(10px, env(safe-area-inset-right)); }
}

@media (prefers-reduced-motion: reduce) {
  .btn, .tab, .course, .card, .progress-fill { transition-duration: .01ms; animation-duration: .01ms; }
}