:root {
  --blue: #1d6ff2;
  --blue-dark: #1556c8;
  --blue-light: #eaf2ff;
  --blue-soft: #f5f9ff;
  --green: #18a058;
  --gray: #6b7280;
  --line: #e6ecf5;
  --bg: #f2f6fc;
  --card: #ffffff;
  --red: #e5484d;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(29, 111, 242, 0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: #1f2733;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.app { max-width: 920px; margin: 0 auto; padding: 16px 14px 40px; }

/* 顶部 */
.topbar { padding: 8px 2px 14px; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 46px; height: 46px; border-radius: 14px; flex: none;
  background: linear-gradient(135deg, var(--blue), #5b9bff);
  color: #fff; font-size: 24px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(29, 111, 242, 0.35);
}
.brand h1 { font-size: 20px; font-weight: 700; color: #14304f; }
.sub { font-size: 12px; color: var(--gray); }

/* 统计条 */
.stats-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 14px; }
.stat-card {
  background: var(--card); border-radius: var(--radius); padding: 12px;
  text-align: center; box-shadow: var(--shadow); border: 1px solid var(--line);
}
.stat-num { font-size: 22px; font-weight: 700; color: var(--blue); }
.stat-label { font-size: 11px; color: var(--gray); margin-top: 2px; }

/* 标签导航 */
.tabs {
  display: flex; gap: 6px; padding: 6px; background: var(--card);
  border: 1px solid var(--line); border-radius: 14px; margin-bottom: 14px;
  overflow-x: auto; box-shadow: var(--shadow);
}
.tab {
  flex: 1; min-width: 76px; padding: 8px 10px; border: none; cursor: pointer;
  background: transparent; color: var(--gray); font-size: 13px; font-weight: 600;
  border-radius: 10px; white-space: nowrap; transition: all .15s;
}
.tab.active { background: var(--blue); color: #fff; }

.view { display: none; animation: fade .2s ease; }
.view.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* 卡片 */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow); margin-bottom: 14px;
}
.card h2 { font-size: 17px; color: #14304f; margin-bottom: 8px; }
.card h3 {
  font-size: 14px; color: #14304f; margin-bottom: 8px;
  display: flex; align-items: center; gap: 8px;
}
.hint { font-size: 12px; color: var(--gray); }
.hint.error { color: var(--red); }
.badge {
  display: inline-block; font-size: 11px; padding: 1px 8px; border-radius: 20px;
  background: var(--blue-light); color: var(--blue); font-weight: 600;
}

/* 进度条 */
.progress-line { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.progress-line span { font-size: 12px; color: var(--gray); flex: none; }
.bar {
  height: 10px; background: var(--blue-light); border-radius: 20px; overflow: hidden; flex: 1;
}
.bar-fill {
  height: 100%; width: 0%; background: linear-gradient(90deg, var(--blue), #5b9bff);
  border-radius: 20px; transition: width .35s ease;
}

/* 任务项 */
.task {
  display: flex; align-items: flex-start; gap: 10px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 12px; margin-bottom: 8px;
  background: var(--blue-soft);
}
.task input[type="checkbox"] {
  width: 20px; height: 20px; flex: none; margin-top: 2px; accent-color: var(--blue);
  cursor: pointer;
}
.task .t-main { flex: 1; min-width: 0; }
.task .t-title { font-size: 14px; font-weight: 600; color: #14304f; }
.task .t-sub { font-size: 11px; color: var(--gray); margin-top: 2px; }
.task.done { opacity: .72; background: #f2fbf6; border-color: #cbe9d9; }
.task.done .t-title { text-decoration: line-through; color: #6b7280; }
.task.done .check { background: var(--green); }

.learn-tag, .review-tag {
  font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 20px; flex: none;
}
.learn-tag { background: var(--blue); color: #fff; }
.review-tag { background: #eef4ff; color: var(--blue); }

.empty {
  text-align: center; color: var(--gray); font-size: 13px; padding: 20px 0;
}

/* 周视图 */
.week-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.week-nav button {
  border: 1px solid var(--line); background: #fff; color: var(--blue);
  padding: 6px 12px; border-radius: 10px; cursor: pointer; font-size: 13px;
}
.week-title { font-size: 15px; font-weight: 700; color: #14304f; }
.week-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 12px; }
.week-days .day-block {
  border: 1px solid var(--line); border-radius: 12px; padding: 8px 10px; margin-bottom: 8px;
}
.day-block .db-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; font-weight: 700; color: #14304f; margin-bottom: 6px;
}
.day-block .db-head .today-flag { color: var(--blue); font-size: 11px; }
.day-block.rest { background: #fafbfd; }
.day-block .db-head .rest-flag { font-size: 11px; font-weight: 600; color: var(--gray); }

/* 日历 */
.cal-head {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; margin-bottom: 6px;
}
.cal-head span { text-align: center; font-size: 12px; color: var(--gray); font-weight: 600; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-cell {
  min-height: 58px; border: 1px solid var(--line); border-radius: 9px; padding: 5px;
  background: #fff; cursor: pointer; position: relative; transition: box-shadow .12s;
}
.cal-cell:hover { box-shadow: 0 2px 8px rgba(29,111,242,.18); }
.cal-cell.blank { background: transparent; border-color: transparent; cursor: default; }
.cal-cell .c-day { font-size: 12px; font-weight: 600; color: #4b5563; }
.cal-cell.sprint { background: #fff7f0; border-color: #ffe3cc; }
.cal-cell.sprint .c-day { color: #d97706; }
.cal-cell.today { border-color: var(--blue); box-shadow: 0 0 0 2px var(--blue-light); }
.cal-cell.rest { background: #fafbfd; }
.cal-cell .c-tag { margin-top: 3px; display: flex; gap: 3px; flex-wrap: wrap; }
.dot {
  width: 8px; height: 8px; border-radius: 50%; display: inline-block;
}
.dot.learn { background: var(--blue); }
.dot.review { background: #8ab4ff; }
.dot.done { background: var(--green); }
.dot.sprint { background: #f6ba8a; }
.cal-cell.finish .c-day { color: var(--green); }
.cal-legend {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-size: 11px; color: var(--gray); margin-top: 10px;
}
.legend-dot { width: 10px; height: 10px; border-radius: 3px; display: inline-block; vertical-align: -1px; }
.legend-dot.done { background: var(--green); }
.legend-dot.part { background: #ffc24b; }
.legend-dot.none { background: #d7e1f0; }
.legend-dot.sprint { background: #ff9d6b; }

/* 课程列表 */
.course-filters { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.cfilter {
  border: 1px solid var(--line); background: #fff; color: var(--gray);
  padding: 4px 12px; border-radius: 20px; cursor: pointer; font-size: 12px;
  display: inline-flex; align-items: center; gap: 5px;
}
.cfilter.active { background: var(--blue); color: #fff; border-color: var(--blue); }
.cfilter .cf-num {
  font-size: 10.5px; min-width: 16px; height: 16px; line-height: 16px;
  text-align: center; border-radius: 10px; padding: 0 4px;
  background: rgba(29,111,242,0.12); color: var(--blue);
}
.cfilter.active .cf-num { background: rgba(255,255,255,0.28); color: #fff; }

.mile-legend {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-size: 11px; color: var(--gray); margin: 0 0 12px; padding: 5px 9px;
  background: var(--blue-soft); border-radius: 8px;
}

.book-group { margin-bottom: 18px; }
.book-title {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 14px; font-weight: 700; color: var(--blue-dark);
  background: linear-gradient(90deg, var(--blue-light), #fff); 
  border-left: 4px solid var(--blue); border-radius: 8px;
  padding: 7px 12px; margin-bottom: 8px;
}
.book-name { flex: 1; }
.book-meta { font-size: 11.5px; font-weight: 600; color: var(--gray); }
.book-bar { flex: none; width: 74px; height: 5px; border-radius: 3px; background: #e3e9f4; overflow: hidden; }
.book-bar-fill { height: 100%; background: var(--blue); border-radius: 3px; transition: width .3s; }

.course-item {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 8px 10px;
  border: 1px solid var(--line); border-left-width: 4px; border-radius: 10px;
  margin-bottom: 6px; cursor: pointer; transition: background .12s, border-color .12s;
  background: #fff;
}
.course-item:hover { background: var(--blue-soft); }
.course-item.selected { border-color: var(--blue); background: var(--blue-soft); }
.course-item.s-not_started { border-left-color: #c7cfdb; }
.course-item.s-fresh { border-left-color: var(--blue); }
.course-item.s-learning { border-left-color: #f0a63b; }
.course-item.s-done { border-left-color: var(--green); }

.course-item .cno {
  font-size: 11px; font-weight: 700; color: #fff; width: 22px; height: 22px; flex: none;
  line-height: 22px; text-align: center; border-radius: 7px; background: #c3cede;
}
.course-item.s-fresh .cno { background: var(--blue); }
.course-item.s-learning .cno { background: #f0a63b; }
.course-item.s-done .cno { background: var(--green); }

.course-item .cname { flex: 1; font-size: 13.5px; color: #1f2733; }
.course-status { font-size: 11px; padding: 1px 8px; border-radius: 20px; flex: none; white-space: nowrap; }
.cs-not_started { background: #eef0f4; color: #6b7280; }
.cs-fresh { background: var(--blue-light); color: var(--blue); }
.cs-learning { background: #fff4e0; color: #d98a00; }
.cs-done { background: #e6f7ee; color: var(--green); }

.mile-dots { display: flex; align-items: center; gap: 3px; flex: none; padding-right: 2px; }
.ms { width: 9px; height: 9px; border-radius: 50%; flex: none; display: inline-block; }
.m-done { background: var(--green); }
.m-due { background: #f0a63b; box-shadow: 0 0 0 2px #fff4e0; }
.m-idle { background: #d3dcec; }
.ms-none { color: #c3cede; font-size: 11px; line-height: 1; }

.course-detail {
  flex: 1 1 100%; order: 9;
  border: 1px dashed var(--line); border-radius: 10px; padding: 10px;
  background: #fff; margin: 2px 0 0;
}
.rev-row {
  display: flex; align-items: center; gap: 8px; font-size: 12px;
  color: #374151; padding: 3px 0;
}
.rev-row .dot-s { width: 8px; height: 8px; border-radius: 50%; }
.rev-row.done .dot-s { background: var(--green); }
.rev-row.pending .dot-s { background: #d3dcec; }

/* 设置 */
.day-picker { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.day-chip {
  border: 1px solid var(--line); background: #fff; color: #374151;
  padding: 10px 0; border-radius: 12px; font-size: 13px; font-weight: 600;
  cursor: pointer; flex: 1 1 72px; text-align: center; transition: all .12s;
}
.day-chip.on { background: var(--blue); color: #fff; border-color: var(--blue); }

textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px; font-size: 13px; font-family: inherit; resize: vertical;
  margin: 8px 0;
}
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  border: none; cursor: pointer; background: var(--blue); color: #fff;
  padding: 9px 16px; border-radius: 10px; font-size: 13px; font-weight: 600;
}
.btn.ghost { background: #fff; color: var(--blue); border: 1px solid var(--blue); }
.btn.danger { background: #fff; color: var(--red); border: 1px solid var(--red); }

.foot {
  text-align: center; color: #9aa6b6; font-size: 11px; padding: 20px 0 4px;
}

@media (max-width: 560px) {
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .stat-num { font-size: 19px; }
  .cal-cell { min-height: 46px; padding: 3px; }
  .cal-cell .c-tag { display: none; }
  .brand h1 { font-size: 17px; }
}

/* 未启用鉴权时的醒目横幅 */
.auth-warn {
  position: fixed; top: 0; left: 0; right: 0; z-index: 999;
  padding: 10px 12px; background: #fff6e0; border-bottom: 1px solid #f0c569;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: opacity .3s, transform .3s;
}
.auth-warn.hide { opacity: 0; transform: translateY(-100%); pointer-events: none; }
.auth-warn-inner {
  max-width: 720px; margin: 0 auto; display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap; font-size: 13px; color: #5b4a16; line-height: 1.5;
}
.auth-warn-inner b { color: #b07d00; }
.auth-warn-inner code {
  background: #fff; border: 1px solid #e6d3a0; padding: 2px 8px; border-radius: 6px;
  font-size: 12px; color: #7a5a00; word-break: break-all;
}
.auth-warn-inner button {
  margin-left: auto; background: #b07d00; color: #fff; border: none; border-radius: 8px;
  padding: 5px 14px; cursor: pointer; font-size: 12px;
}
.auth-warn-inner button:hover { background: #936a00; }