:root {
  /* 对齐图标：墨绿底 + 金色强调，课表工具偏克制 */
  --bg: #0a3d2e;
  --bg-deep: #06281e;
  --bg-soft: #0f4a39;
  --gold: #d4af37;
  --gold-bright: #f0d878;
  --gold-dim: #a8882a;
  --card: #f7f5ef;
  --card-solid: #ffffff;
  --ink: #1a2e26;
  --muted: #5a6b63;
  /* 浅色底上的强调绿（比正文明显更绿，用于「无课」等状态） */
  --green-mark: #0f7a52;
  --line: rgba(10, 61, 46, 0.12);
  --line-gold: rgba(212, 175, 55, 0.45);
  --danger: #9b2c2c;
  --shadow: 0 8px 28px rgba(6, 40, 30, 0.28);
  --radius: 10px;
  --radius-sm: 6px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  font-family: var(--font);
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(212, 175, 55, 0.06), transparent 180px),
    linear-gradient(165deg, var(--bg-deep) 0%, var(--bg) 42%, #0c4534 100%);
  background-attachment: fixed;
}

body {
  min-height: 100dvh;
  height: 100dvh;
  overflow: hidden;
}

.app {
  width: min(920px, 100%);
  margin: 0 auto;
  height: 100%;
  max-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-sizing: border-box;
  /* iOS 刘海/灵动岛：viewport-fit=cover 时内容会顶到状态栏下，用安全区把顶栏顶下来 */
  padding:
    calc(12px + env(safe-area-inset-top, 0px))
    calc(14px + env(safe-area-inset-right, 0px))
    calc(12px + env(safe-area-inset-bottom, 0px))
    calc(14px + env(safe-area-inset-left, 0px));
}

.top {
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  padding: 4px 2px 10px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.28);
}

.top-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(212, 175, 55, 0.45);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--gold-bright);
  cursor: pointer;
  padding: 0;
}

.icon-btn:hover {
  background: rgba(212, 175, 55, 0.14);
}

.brand {
  margin: 0;
  font-size: clamp(1.15rem, 3.6vw, 1.45rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold-bright);
  line-height: 1.25;
}

.sub {
  margin: 6px 0 0;
  color: rgba(240, 216, 120, 0.78);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  line-height: 1.4;
  /* 避免「期」等单字落到下一行；过长时在词间断行 */
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.panel {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(212, 175, 55, 0.22);
  padding: 18px 16px 20px;
}

.panel[hidden] {
  display: none !important;
}

/**
 * 课表视图：周次导航 +「选择周次」固定，仅下方课程卡片区域滚动。
 */
#viewSchedule.panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding-bottom: 12px;
}

.schedule-stack {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#viewSchedule .week-nav,
#viewSchedule .week-jump {
  flex-shrink: 0;
  overflow-y: hidden;
}

/**
 * 课程卡片与「本周」同宽右缘平齐；滚动条叠在卡片内侧，不额外占一列。
 */
#viewSchedule .schedule-scroll {
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  margin: 0;
  padding: 0 0 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(10, 61, 46, 0.32) transparent;
  scrollbar-gutter: auto;
}

@supports (overflow: overlay) {
  #viewSchedule .schedule-scroll {
    overflow-y: overlay;
  }
}

#viewSchedule .schedule-scroll::-webkit-scrollbar {
  width: 5px;
}

#viewSchedule .schedule-scroll::-webkit-scrollbar-track {
  background: transparent;
}

#viewSchedule .schedule-scroll::-webkit-scrollbar-thumb {
  background: rgba(10, 61, 46, 0.28);
  border-radius: 8px;
}

.panel h1 {
  margin: 0 0 8px;
  font-size: 1.2rem;
  color: var(--bg);
  letter-spacing: 0.02em;
}

.hint,
.tip,
.status {
  color: var(--muted);
  line-height: 1.55;
  font-size: 0.92rem;
}

.field {
  display: grid;
  gap: 8px;
  margin: 16px 0;
  font-weight: 600;
  color: var(--bg);
  font-size: 0.92rem;
}

select,
button {
  font: inherit;
}

select {
  appearance: none;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius-sm);
  padding: 14px 34px 14px 14px;
  min-height: 48px;
  font-size: 1rem;
  background: var(--card-solid)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath fill='%230a3d2e' d='M0 0l6 8 6-8z'/%3E%3C/svg%3E")
    no-repeat right 12px center;
  color: var(--ink);
  touch-action: manipulation;
  /* 仅 accent-color；勿改 option 文字色，部分浏览器会白字无底导致选项“消失” */
  accent-color: var(--bg);
}

select:focus {
  outline: 2px solid rgba(212, 175, 55, 0.55);
  outline-offset: 1px;
}

.upload {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 112px;
  margin: 0;
  border: 1.5px dashed var(--gold-dim);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(10, 61, 46, 0.04), rgba(212, 175, 55, 0.08));
  cursor: pointer;
  font-weight: 700;
  color: var(--bg);
  appearance: none;
  -webkit-appearance: none;
  box-sizing: border-box;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

#uploadLabel {
  pointer-events: none;
}

.upload:hover {
  background: linear-gradient(180deg, rgba(10, 61, 46, 0.07), rgba(212, 175, 55, 0.14));
}

.upload.is-busy {
  pointer-events: none;
}

.upload.is-busy #uploadLabel {
  opacity: 0.72;
}

.upload.is-dimmed #uploadLabel {
  opacity: 0.55;
}

.upload[hidden] {
  display: none !important;
}

/**
 * 真正选文件的控件藏在按钮外：不盖住点击区。
 * 打开选择器只走按钮 click → input.click()，避免 PWA 点透明层没反应。
 */
.file-input-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  opacity: 0;
  pointer-events: none;
}

.class-step {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.class-step[hidden] {
  display: none !important;
}

.course-groups {
  display: grid;
  gap: 16px;
}

.course-group {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 61, 46, 0.03);
}

.course-group h3 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  color: var(--bg);
}

/** 设置页「选择课程」与分组标题「N选一」同级字号 */
.settings-course-title {
  margin: 0 0 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--bg);
}

.course-option {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 0 0 10px;
  padding: 12px 14px;
  min-height: 52px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}

.course-option:last-child {
  margin-bottom: 0;
}

.course-option:active {
  background: rgba(212, 175, 55, 0.12);
}

.course-option:has(input:checked) {
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.14);
  box-shadow: inset 0 0 0 1px rgba(212, 175, 55, 0.35);
}

.course-option input {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin: 0;
  accent-color: var(--bg);
}

.course-option-text {
  display: grid;
  gap: 4px;
  min-width: 0;
  line-height: 1.35;
}

.course-name {
  font-size: 1rem;
}

.course-teacher {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.88rem;
}

.primary.block,
.ghost.block {
  display: block;
  width: 100%;
  text-align: center;
  margin-top: 12px;
}

.status {
  min-height: 1.4em;
  margin-top: 12px;
}

.status.error {
  color: var(--danger);
}

.status.ok {
  color: var(--bg);
  font-weight: 600;
}

.tip {
  margin-top: 16px;
  font-size: 0.84rem;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

/* 使用说明：标题与步骤同一栏对齐，灰色说明统一缩进 */
.guide {
  margin: 0 0 16px;
  padding: 14px 16px 14px;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(10, 61, 46, 0.035), rgba(212, 175, 55, 0.07));
}

.guide-title {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--bg);
}

.guide-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.guide-lead,
.guide-note {
  margin: 0;
  line-height: 1.55;
}

.guide-lead {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink);
}

.guide-num {
  display: inline;
  margin-right: 0.3em;
  font-size: inherit;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: inherit;
}

.guide-note,
.guide-os {
  margin: 5px 0 0 1.35em;
  padding: 0;
}

.guide-note,
.guide-os li {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.guide-os {
  list-style: none;
}

.guide-os li {
  margin: 0;
}

.guide-os li + li {
  margin-top: 3px;
}

.guide-os li::before {
  content: "·";
  display: inline-block;
  margin-right: 0.28em;
  font-size: 1.35em;
  font-weight: 700;
  line-height: 1;
  vertical-align: -0.06em;
}

.ghost,
.primary,
.danger {
  border: 0;
  border-radius: var(--radius-sm);
  padding: 9px 13px;
  cursor: pointer;
}

.ghost {
  background: transparent;
  color: var(--gold-bright);
  border: 1px solid rgba(212, 175, 55, 0.45);
}

#viewSchedule .ghost,
dialog .ghost {
  background: rgba(10, 61, 46, 0.05);
  color: var(--bg);
  border-color: var(--line-gold);
}

.primary {
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: var(--bg-deep);
  font-weight: 700;
}

.danger {
  background: rgba(155, 44, 44, 0.08);
  color: var(--danger);
  border: 1px solid rgba(155, 44, 44, 0.25);
}

.week-nav {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 36px;
  gap: 6px;
  align-items: center;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

/* SVG 箭头几何居中，避免 ‹ › 字体基线偏上 */
.nav-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  margin: 0;
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--gold-bright);
  cursor: pointer;
  flex-shrink: 0;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.nav-btn svg {
  display: block;
  width: 18px;
  height: 18px;
}

.nav-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.week-title {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2px;
  text-align: center;
  line-height: 1.25;
  min-width: 0;
}

.week-title strong {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--bg);
}

.week-term {
  color: var(--muted);
  /* 相对日期再小两号，层次更轻 */
  font-size: 0.7rem;
  font-weight: 600;
}

.week-empty-state {
  display: grid;
  place-items: center;
  padding: 12px 8px 8px;
}

.week-empty-state[hidden] {
  display: none !important;
}

.week-empty-state img {
  width: min(280px, 78vw);
  height: auto;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(6, 40, 30, 0.18);
}

.week-jump {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  align-items: stretch;
  width: 100%;
  margin: 0 0 10px;
  box-sizing: border-box;
}

.week-picker-btn,
.week-today-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 12px;
  font-size: 0.875rem;
  font-weight: 700;
  text-align: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  box-sizing: border-box;
}

#viewSchedule .week-picker-btn.ghost,
#viewSchedule .week-today-btn.ghost {
  background: rgba(10, 61, 46, 0.05);
  color: var(--bg);
  border: 1px solid var(--line-gold);
}

#viewSchedule .week-today-btn.primary {
  border: 0;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: var(--bg-deep);
}

.week-picker-value {
  color: inherit;
  line-height: 1.3;
  white-space: nowrap;
}

.week-picker-dialog {
  width: min(92vw, 420px);
  max-height: min(78vh, 640px);
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.week-picker-list {
  display: grid;
  gap: 6px;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 4px 2px 8px;
  margin: 0 -2px;
  overscroll-behavior: contain;
}

.week-picker-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 42px;
  padding: 9px 12px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink);
  font-size: 0.875rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}

.week-picker-option:active {
  background: rgba(212, 175, 55, 0.12);
}

.week-picker-option.is-selected {
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.14);
  box-shadow: inset 0 0 0 1px rgba(212, 175, 55, 0.35);
}

.week-picker-option-text {
  flex: 1;
  min-width: 0;
  font-size: 0.875rem;
  line-height: 1.35;
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, "Cascadia Mono", "Segoe UI", "PingFang SC", "Microsoft YaHei", monospace;
  letter-spacing: 0.01em;
  white-space: pre;
}

/** 周次列表/按钮上的「无课」：浅底上用更醒目的系统绿，与正文墨色区分 */
.week-picker-option .week-empty-tag,
.week-picker-value .week-empty-tag {
  color: var(--green-mark);
  font-weight: 700;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

.week-picker-option-mark {
  flex-shrink: 0;
  color: var(--bg);
  font-size: 0.85rem;
}

.confirm-msg {
  margin: 8px 0 16px;
  color: var(--ink);
  line-height: 1.5;
}

.days {
  display: grid;
  gap: 12px;
}

@media (min-width: 800px) {
  .days {
    grid-template-columns: 1fr 1fr;
  }
}

.day {
  background: var(--card-solid);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  /* 左右内边距一致 */
  padding: 12px;
}

.day h2 {
  margin: 0 0 4px;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--bg);
  padding-bottom: 8px;
}

.day h2 span {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.88rem;
}

.slot {
  display: grid;
  gap: 3px;
  /* 左右内边距一致，与日期卡片左右留白对齐 */
  padding: 10px 12px;
  border-top: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  box-sizing: border-box;
}

.slot:first-of-type {
  border-top: 0;
}

.slot-time,
.slot-meta {
  display: grid;
  /* 与「选择周次 / 本周」同为 1fr 1fr，右列时间与教室居中对齐 */
  grid-template-columns: 1fr 1fr;
  column-gap: 8px;
  align-items: baseline;
}

.slot-time {
  font-size: 0.78rem;
  color: var(--gold-dim);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.slot-period,
.slot-teacher {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.slot-period,
.slot-clock {
  font-variant-numeric: tabular-nums;
}

.slot-course {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.slot-meta {
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  line-height: 1.45;
}

.slot-clock,
.slot-loc {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: left;
}

.slot:not(.empty):not(.note) {
  background: rgba(10, 61, 46, 0.04);
}

.slot.empty .slot-course {
  color: #8a9791;
  font-weight: 600;
}

.slot.note {
  background: rgba(212, 175, 55, 0.1);
}

.slot.note .slot-course {
  color: var(--gold-dim);
}

dialog {
  border: 1px solid var(--line-gold);
  border-radius: 12px;
  padding: 0;
  width: min(420px, calc(100vw - 24px));
  box-shadow: var(--shadow);
  background: var(--card);
}

dialog::backdrop {
  background: rgba(6, 40, 30, 0.62);
}

.dialog-body {
  padding: 18px;
  position: relative;
}

.dialog-body h2 {
  margin: 0 36px 12px 0;
  color: var(--bg);
}

.dialog-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.dialog-close:hover {
  background: rgba(10, 61, 46, 0.08);
  color: var(--bg);
}

.dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

/* display/grid/flex 规则不能覆盖原生 hidden，否则未导入时仍会露出保存按钮 */
.dialog-actions[hidden],
.settings-empty[hidden] {
  display: none !important;
}

.settings-empty {
  margin: 12px 0 4px;
  color: var(--muted);
  line-height: 1.5;
  text-align: center;
}

.dialog-actions.dialog-actions-confirm {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-items: stretch;
}

.dialog-actions.dialog-actions-confirm .ghost,
.dialog-actions.dialog-actions-confirm .primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  margin: 0;
  text-align: center;
}

.dialog-actions-save .primary {
  width: 100%;
}

.dialog-actions-bottom {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.dialog-actions .block {
  width: 100%;
  text-align: center;
}

.share-status {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
  margin: 0 0 12px;
}

.share-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 14px;
  padding: 4px;
  background: rgba(10, 61, 46, 0.06);
  border-radius: 8px;
}

.share-tab {
  border: 0;
  border-radius: 6px;
  padding: 9px 10px;
  background: transparent;
  color: var(--bg);
  font-weight: 600;
  cursor: pointer;
}

.share-tab.active {
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: var(--bg-deep);
}

.share-link-row {
  display: flex;
  gap: 8px;
}

.share-link-row input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
  font-size: 0.85rem;
}

.share-qr {
  display: block;
  width: min(240px, 70vw);
  height: auto;
  margin: 0 auto 10px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
  -webkit-touch-callout: default;
  user-select: none;
}

.share-link-row .ghost,
.share-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  text-decoration: none;
  padding: 10px 12px;
  min-height: 40px;
  box-sizing: border-box;
}

.share-download {
  display: flex;
  margin-top: 8px;
  width: 100%;
}