/* ============================================================
   学序 2.0 · Liquid Glass layer
   参考 iOS 27 / macOS 27 Golden Gate 的修订版 Liquid Glass：
   - 玻璃只用于导航与浮层
   - 内容保持近实色，优先可读性
   - 暗边 + 顶部高光 + 轻微扩散
   - 适配降低透明度 / 增强对比度
   ============================================================ */

:root {
  --v2-radius-card: 16px;
  --v2-radius-control: 12px;
  --v2-radius-sheet: 22px;

  --v2-blue: #0a6cff;
  --v2-blue-strong: #0057d8;
  --v2-blue-soft: rgba(10, 108, 255, 0.11);

  --v2-glass-bg: rgba(255, 255, 255, 0.72);
  --v2-glass-bg-strong: rgba(255, 255, 255, 0.88);
  --v2-glass-border: rgba(15, 23, 42, 0.1);
  --v2-glass-highlight: rgba(255, 255, 255, 0.72);
  --v2-glass-shadow: 0 12px 34px rgba(15, 23, 42, 0.08);
  --v2-card-bg: rgba(255, 255, 255, 0.985);
  --v2-card-border: rgba(15, 23, 42, 0.08);
  --v2-card-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.035);
  --v2-separator: rgba(60, 60, 67, 0.16);
  --v2-sidebar-bg: rgba(250, 250, 252, 0.72);
  --v2-tabbar-bg: rgba(252, 252, 254, 0.78);
  --v2-overlay: rgba(15, 18, 24, 0.28);
  --v2-tint: #0a6cff;
}

:root[data-theme="dark"] {
  --v2-glass-bg: rgba(28, 30, 36, 0.68);
  --v2-glass-bg-strong: rgba(32, 35, 42, 0.9);
  --v2-glass-border: rgba(255, 255, 255, 0.12);
  --v2-glass-highlight: rgba(255, 255, 255, 0.16);
  --v2-glass-shadow: 0 16px 42px rgba(0, 0, 0, 0.38);
  --v2-card-bg: rgba(28, 30, 36, 0.95);
  --v2-card-border: rgba(255, 255, 255, 0.09);
  --v2-card-shadow: 0 1px 1px rgba(0, 0, 0, 0.24), 0 10px 30px rgba(0, 0, 0, 0.22);
  --v2-separator: rgba(235, 235, 245, 0.16);
  --v2-sidebar-bg: rgba(22, 24, 30, 0.72);
  --v2-tabbar-bg: rgba(24, 26, 32, 0.78);
  --v2-overlay: rgba(0, 0, 0, 0.5);
  --v2-blue-soft: rgba(84, 151, 255, 0.18);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --v2-glass-bg: rgba(28, 30, 36, 0.68);
    --v2-glass-bg-strong: rgba(32, 35, 42, 0.9);
    --v2-glass-border: rgba(255, 255, 255, 0.12);
    --v2-glass-highlight: rgba(255, 255, 255, 0.16);
    --v2-glass-shadow: 0 16px 42px rgba(0, 0, 0, 0.38);
    --v2-card-bg: rgba(28, 30, 36, 0.95);
    --v2-card-border: rgba(255, 255, 255, 0.09);
    --v2-card-shadow: 0 1px 1px rgba(0, 0, 0, 0.24), 0 10px 30px rgba(0, 0, 0, 0.22);
    --v2-separator: rgba(235, 235, 245, 0.16);
    --v2-sidebar-bg: rgba(22, 24, 30, 0.72);
    --v2-tabbar-bg: rgba(24, 26, 32, 0.78);
    --v2-overlay: rgba(0, 0, 0, 0.5);
    --v2-blue-soft: rgba(84, 151, 255, 0.18);
  }
}

/* 玻璃强度：设置页后续会写入 html[data-glass] */
:root[data-glass="clear"] {
  --v2-glass-bg: rgba(255, 255, 255, 0.56);
  --v2-sidebar-bg: rgba(250, 250, 252, 0.56);
  --v2-tabbar-bg: rgba(252, 252, 254, 0.64);
}
:root[data-glass="tinted"] {
  --v2-glass-bg: rgba(255, 255, 255, 0.9);
  --v2-sidebar-bg: rgba(248, 249, 252, 0.92);
  --v2-tabbar-bg: rgba(250, 251, 253, 0.94);
}
:root[data-theme="dark"][data-glass="clear"] {
  --v2-glass-bg: rgba(28, 30, 36, 0.54);
  --v2-sidebar-bg: rgba(22, 24, 30, 0.54);
  --v2-tabbar-bg: rgba(24, 26, 32, 0.64);
}
:root[data-theme="dark"][data-glass="tinted"] {
  --v2-glass-bg: rgba(32, 35, 42, 0.92);
  --v2-sidebar-bg: rgba(24, 26, 32, 0.94);
  --v2-tabbar-bg: rgba(26, 28, 34, 0.95);
}

@media (prefers-reduced-transparency: reduce) {
  :root,
  :root[data-theme="dark"] {
    --v2-glass-bg: var(--surface) !important;
    --v2-glass-bg-strong: var(--surface) !important;
    --v2-sidebar-bg: var(--bg-elevated) !important;
    --v2-tabbar-bg: var(--bg-elevated) !important;
    --v2-card-bg: var(--surface) !important;
  }
  .sidebar,
  .tabbar,
  .modal {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}

/* ---------------- 背景与骨架 ---------------- */
body {
  background:
    radial-gradient(1200px 700px at 82% -12%, rgba(10, 108, 255, 0.055), transparent 58%),
    radial-gradient(900px 600px at -10% 18%, rgba(120, 98, 255, 0.045), transparent 55%),
    var(--bg);
}

.app {
  background: transparent;
}

/* ---------------- 登录：近实色卡片，不使用玻璃叠玻璃 ---------------- */
.auth-wrap {
  background:
    radial-gradient(900px 600px at 50% -10%, rgba(10, 108, 255, 0.1), transparent 62%),
    radial-gradient(700px 500px at 90% 90%, rgba(120, 98, 255, 0.08), transparent 58%),
    var(--bg);
  padding: max(24px, var(--safe-top)) 16px calc(24px + var(--safe-bottom));
}
.auth-card {
  max-width: 420px;
  padding: 28px 24px 22px;
  border-radius: 26px;
  border: 0.5px solid var(--v2-card-border);
  background: var(--v2-card-bg);
  box-shadow: var(--v2-card-shadow), inset 0 1px 0 var(--v2-glass-highlight);
}
.auth-card h1 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
}
.recovery-box {
  border-radius: 16px;
  background: var(--v2-blue-soft);
  border-color: color-mix(in srgb, var(--v2-tint) 24%, transparent);
  color: var(--accent-text);
}

/* ---------------- 桌面侧栏：edge-to-edge + 彩色图标 ---------------- */
.sidebar {
  background: var(--v2-sidebar-bg);
  border-right: 0.5px solid var(--v2-glass-border);
  -webkit-backdrop-filter: blur(28px) saturate(170%);
  backdrop-filter: blur(28px) saturate(170%);
  box-shadow: 1px 0 0 var(--v2-glass-highlight) inset;
}

.brand {
  padding: 8px 10px 20px;
}
.brand-mark {
  border-radius: 11px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.34), transparent 42%),
    linear-gradient(145deg, #4b8dff, #0a5bd6);
  box-shadow:
    0 6px 16px rgba(10, 108, 255, 0.26),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
}
.brand-name {
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.015em;
}

.nav {
  gap: 3px;
}
.nav-item {
  padding: 9px 10px;
  border-radius: 11px;
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 540;
  border: 0.5px solid transparent;
}
.nav-item svg {
  color: var(--v2-tint);
  opacity: 1;
}
.nav-item[data-nav="home"] svg { color: #0a84ff; }
.nav-item[data-nav="courses"] svg { color: #2f9e44; }
.nav-item[data-nav="assignments"] svg { color: #0a6cff; }
.nav-item[data-nav="projects"] svg { color: #8b5cf6; }
.nav-item[data-nav="calendar"] svg { color: #e8590c; }
.nav-item[data-nav="sites"] svg { color: #0c8599; }
.nav-item[data-nav="settings"] svg { color: #6b7280; }
.nav-item:hover {
  background: color-mix(in srgb, var(--surface-3) 72%, transparent);
}
.nav-item[aria-current="page"] {
  background: var(--v2-blue-soft);
  border-color: color-mix(in srgb, var(--v2-tint) 18%, transparent);
  color: var(--accent-text);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.nav-item[aria-current="page"] svg {
  color: var(--v2-tint);
}
.nav-badge {
  background: color-mix(in srgb, var(--danger) 14%, transparent);
  color: var(--danger-2);
  font-weight: 650;
}

/* ---------------- 内容层：近实色卡片，保持可读 ---------------- */
.page {
  padding-top: 28px;
}
.page-title {
  font-size: 26px;
  font-weight: 680;
  letter-spacing: -0.03em;
}
.page-sub {
  color: var(--muted);
}

.card {
  background: var(--v2-card-bg);
  border: 0.5px solid var(--v2-card-border);
  border-radius: var(--v2-radius-card);
  box-shadow: var(--v2-card-shadow);
}

.list-item {
  border-bottom: 0.5px solid var(--v2-separator);
}
.card > .list-item:first-child {
  border-top-left-radius: var(--v2-radius-card);
  border-top-right-radius: var(--v2-radius-card);
}
.card > .list-item:last-child {
  border-bottom-left-radius: var(--v2-radius-card);
  border-bottom-right-radius: var(--v2-radius-card);
}

.section-title {
  font-size: 14.5px;
  font-weight: 650;
}
.section-title .count {
  background: color-mix(in srgb, var(--surface-3) 82%, transparent);
}

/* ---------------- 控件：iOS 触感 ---------------- */
.btn {
  border-radius: var(--v2-radius-control);
  font-weight: 560;
  border-color: var(--v2-separator);
}
.btn-primary {
  background: var(--v2-blue);
  border-color: var(--v2-blue);
  box-shadow: 0 4px 12px rgba(10, 108, 255, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}
.btn-primary:hover {
  background: var(--v2-blue-strong);
  border-color: var(--v2-blue-strong);
}
.btn-soft {
  background: var(--v2-blue-soft);
  color: var(--accent-text);
}
.btn-ghost {
  border-color: transparent;
}
.input,
.select,
.textarea {
  border-radius: var(--v2-radius-control);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  border-color: var(--v2-separator);
}
.seg {
  border-radius: 12px;
  background: color-mix(in srgb, var(--surface-3) 80%, transparent);
}
.seg-item {
  border-radius: 9px;
}
.badge {
  border-radius: 7px;
}

/* ---------------- 底部 Tabbar：Liquid Glass ---------------- */
.tabbar {
  background: var(--v2-tabbar-bg);
  border-top: 0.5px solid var(--v2-glass-border);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  backdrop-filter: blur(30px) saturate(180%);
  box-shadow:
    inset 0 1px 0 var(--v2-glass-highlight),
    0 -8px 30px rgba(15, 23, 42, 0.045);
}
.tab {
  color: var(--muted);
}
.tab[aria-current="page"] {
  color: var(--v2-tint);
}
.tab-badge {
  background: var(--v2-blue);
  box-shadow: 0 2px 6px rgba(10, 108, 255, 0.28);
}

/* ---------------- 筛选：桌面 Seg / 手机 FilterSheet ---------------- */
.filter-tabs {
  min-width: 0;
}
.filter-tabs-desktop {
  display: block;
}
.filter-trigger {
  display: none;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 0.5px solid var(--v2-card-border);
  border-radius: var(--v2-radius-control);
  background: var(--v2-card-bg);
  color: var(--text);
  font-size: 13px;
  font-weight: 560;
  text-align: left;
  box-shadow: var(--v2-card-shadow);
}
.filter-trigger-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.filter-trigger-count {
  min-width: 20px;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--v2-blue-soft);
  color: var(--accent-text);
  font-size: 11px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.filter-trigger svg {
  color: var(--faint);
  flex: none;
}
.filter-menu {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.filter-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 46px;
  padding: 0 10px;
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  text-align: left;
}
.filter-option:hover {
  background: var(--surface-2);
}
.filter-option[aria-selected="true"] {
  background: var(--v2-blue-soft);
  color: var(--accent-text);
  font-weight: 600;
}
.filter-option > span:first-child {
  flex: 1;
}
.filter-option-count {
  min-width: 22px;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--surface-3);
  color: var(--muted);
  font-size: 11px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* ---------------- 课表：手机切换为单日议程 ---------------- */
.tt-mobile {
  display: none;
}
.tt-daystrip {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
  margin: 2px 0 10px;
}
.tt-daytab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-height: 54px;
  padding: 6px 2px;
  border: 0.5px solid var(--v2-card-border);
  border-radius: 11px;
  background: var(--v2-card-bg);
  color: var(--muted);
  font-size: 10.5px;
}
.tt-daytab strong {
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.tt-daytab.today {
  border-color: var(--v2-blue);
}
.tt-daytab[aria-selected="true"] {
  background: var(--v2-blue);
  border-color: var(--v2-blue);
  color: rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 12px rgba(10, 108, 255, 0.2);
}
.tt-daytab[aria-selected="true"] strong {
  color: #fff;
}
.tt-day-card {
  overflow: hidden;
}
.tt-day-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 15px;
  border-bottom: 0.5px solid var(--v2-separator);
  font-size: 12.5px;
  color: var(--muted);
}
.tt-day-head > span:first-child {
  color: var(--text);
  font-weight: 600;
}
.tt-day-head > span:last-child {
  margin-left: auto;
}
.tt-day-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 15px;
  border-bottom: 0.5px solid var(--v2-separator);
  text-align: left;
}
.tt-day-item:last-child {
  border-bottom: none;
}
.tt-day-item[data-status="moved"],
.tt-day-item[data-status="makeup"] {
  background: color-mix(in srgb, var(--warn) 6%, transparent);
}
.tt-day-time {
  flex: none;
  width: 54px;
  font-size: 12.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.tt-day-time small {
  display: block;
  margin-top: 1px;
  font-size: 10.5px;
  font-weight: 500;
  color: var(--muted);
}
.tt-day-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.tt-day-name {
  font-size: 14px;
  font-weight: 600;
}
.tt-day-sub {
  font-size: 11.5px;
  color: var(--muted);
}
@media (max-width: 640px) {
  .tt-scroll,
  .tt-legend {
    display: none;
  }
  .tt-mobile {
    display: block;
  }
}

/* ---------------- 月视图：手机只显示点阵，详情看当天安排 ---------------- */
.cal-dots {
  display: none;
}
@media (max-width: 640px) {
  .cal-cell {
    min-height: 64px;
    gap: 2px;
  }
  .cal-item {
    display: none;
  }
  .cal-cell > .tiny.muted {
    display: none;
  }
  .cal-dots {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 3px;
    padding: 2px 2px 0;
  }
  .cal-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex: none;
  }
  .cal-dots-more {
    font-size: 9px;
    line-height: 1;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
  }
}

/* ---------------- 浮层：只在这里用玻璃 ---------------- */
.overlay {
  background: var(--v2-overlay);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.modal {
  border-radius: var(--v2-radius-sheet);
  border: 0.5px solid var(--v2-glass-border);
  background: var(--v2-glass-bg-strong);
  -webkit-backdrop-filter: blur(30px) saturate(170%);
  backdrop-filter: blur(30px) saturate(170%);
  box-shadow:
    var(--v2-glass-shadow),
    inset 0 1px 0 var(--v2-glass-highlight);
}
.sheet-grabber {
  display: none;
}
.modal-head,
.modal-foot {
  border-color: var(--v2-separator);
}
.modal-foot {
  background: color-mix(in srgb, var(--surface-2) 78%, transparent);
}

/* ---------------- 手机 ---------------- */
@media (max-width: 900px) {
  .page {
    padding: 18px 16px calc(var(--tabbar-h) + var(--safe-bottom) + 30px);
  }
  .page-title {
    font-size: 30px;
    letter-spacing: -0.035em;
  }
  .page-head {
    margin-bottom: 16px;
  }
  .section {
    margin-bottom: 22px;
  }
  .card {
    border-radius: 18px;
  }
  .list-item {
    padding: 14px 16px;
  }
  .tabbar {
    border-radius: 18px 18px 0 0;
  }
  .tab {
    font-size: 10px;
    gap: 2px;
  }
  .tab svg {
    width: 21px;
    height: 21px;
  }
  .tabbar-inner {
    padding: 0 4px;
  }
  .btn {
    min-height: 44px;
  }
  .btn-sm {
    min-height: 38px;
  }
  .btn-icon {
    width: 44px;
    height: 44px;
  }
  .btn-icon.sm {
    width: 40px;
    height: 40px;
  }
  .nav-item {
    min-height: 44px;
  }
  .seg-item {
    min-height: 34px;
  }
  .input,
  .select {
    height: 44px;
  }
  .search-box .input {
    height: 44px;
  }
}

@media (max-width: 700px) {
  .filter-tabs-desktop {
    display: none;
  }
  .filter-trigger {
    display: flex;
  }
  .filter-tabs {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .overlay {
    align-items: flex-end;
  }
  .modal {
    border-radius: 24px 24px 0 0;
    max-height: calc(var(--vv-height, 92dvh) - 8px);
  }
  .sheet-grabber {
    display: block;
    width: 36px;
    height: 5px;
    margin: 8px auto 0;
    border-radius: 3px;
    background: var(--line-strong);
    flex: none;
  }
}

@media (max-width: 420px) {
  .page-title {
    font-size: 28px;
  }
}

@media (max-width: 380px) {
  .page-head {
    align-items: flex-start;
  }
  .page-actions {
    width: 100%;
  }
  .settings-row {
    flex-wrap: wrap;
    align-items: flex-start;
  }
  .settings-row > :last-child {
    margin-left: auto;
  }
  .modal-foot {
    flex-wrap: wrap;
  }
  .modal-foot .btn {
    flex: 1 1 auto;
  }
  .proj-foot {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }
}

@media (prefers-contrast: more) {
  :root {
    --v2-glass-border: color-mix(in srgb, var(--text) 28%, transparent);
    --v2-separator: color-mix(in srgb, var(--text) 26%, transparent);
    --v2-card-border: color-mix(in srgb, var(--text) 22%, transparent);
  }
  .sidebar,
  .tabbar,
  .modal {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: var(--bg-elevated);
  }
}