/* 哆米音乐教务系统 T1 — 自包含原生 CSS，移动端可用 */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --text: #1f2329;
  --muted: #8a8f99;
  --primary: #3a6ff7;
  --border: #e8eaee;
  --ok-bg: #e6f6ec;    --ok-fg: #1a9e4b;
  --warn-bg: #fff4e0;  --warn-fg: #d98a00;
  --danger-bg: #fde8e8; --danger-fg: #d93026;
  --info-bg: #e8f0fe;  --info-fg: #3a6ff7;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

/* ---------- 顶栏 ---------- */
.topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px 6px;
  max-width: 860px;
  margin: 0 auto;
}
.brand { font-weight: 700; font-size: 16px; }
.user { font-size: 13px; color: var(--muted); }
.logout { color: var(--primary); text-decoration: none; margin-left: 6px; }

.nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0 12px;
  max-width: 860px;
  margin: 0 auto;
}
.nav a {
  flex: 0 0 auto;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.nav a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

/* ---------- 主体 ---------- */
.main {
  max-width: 860px;
  margin: 0 auto;
  padding: 14px 12px 40px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
}
.card h2 {
  font-size: 15px;
  margin-bottom: 10px;
}
.count {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  margin-left: 4px;
}
.card-warning {
  border-color: #f0c36d;
  background: #fffcf4;
}

/* ---------- 日期条 ---------- */
.date-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.date-nav {
  color: var(--primary);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 8px;
  flex: 0 0 auto;
}
.date-center { text-align: center; }
.date-text { font-weight: 700; font-size: 16px; }
.back-today { font-size: 12px; color: var(--primary); text-decoration: none; }

/* ---------- 课程列表 ---------- */
.lesson-list { list-style: none; }
.lesson {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}
.lesson:first-child { border-top: none; padding-top: 2px; }
.lesson-time {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 14px;
  flex: 0 0 92px;
  padding-top: 1px;
}
.lesson-main { flex: 1 1 auto; min-width: 0; }
.lesson-title { font-weight: 600; font-size: 14px; }
.lesson-sub { font-size: 13px; color: var(--muted); }
.badges { flex: 0 0 auto; display: flex; flex-direction: column; gap: 4px; align-items: flex-end; }

.badge {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.badge-已到课 { background: var(--ok-bg); color: var(--ok-fg); }
.badge-补课   { background: var(--ok-bg); color: var(--ok-fg); }
.badge-请假   { background: var(--warn-bg); color: var(--warn-fg); }
.badge-临时请假 { background: var(--danger-bg); color: var(--danger-fg); }
.badge-缺勤   { background: var(--danger-bg); color: var(--danger-fg); }
.badge-待确认 { background: var(--info-bg); color: var(--info-fg); }
.badge-未考勤 { background: #eef0f3; color: var(--muted); }
.badge-取消   { background: #eef0f3; color: var(--muted); }
.badge-kind   { background: #f3e8fd; color: #8a3ffc; }

/* ---------- 简单列表 / 空状态 ---------- */
.simple-list { list-style: none; }
.simple-list li {
  padding: 7px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.simple-list li:first-child { border-top: none; }
.empty {
  color: var(--muted);
  font-size: 14px;
  padding: 6px 0;
}
.muted { color: var(--muted); }
.text-danger { color: var(--danger-fg); font-weight: 600; }

/* ---------- 登录页 ---------- */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  width: 100%;
  max-width: 360px;
}
.login-card h1 { font-size: 19px; margin-bottom: 4px; }
.login-card .muted { font-size: 13px; margin-bottom: 18px; }
.login-form label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}
.login-form input {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
}
.login-form input:focus { outline: 2px solid var(--info-bg); border-color: var(--primary); }
.login-form button {
  width: 100%;
  padding: 11px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 4px;
}
.alert {
  background: var(--danger-bg);
  color: var(--danger-fg);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 14px;
}

/* ---------- 占位页 ---------- */
.placeholder-card { text-align: center; padding: 48px 20px; }
.placeholder-icon { font-size: 40px; margin-bottom: 10px; }
.placeholder-card h2 { margin-bottom: 6px; }
.placeholder-card p { margin-bottom: 6px; }
.back-home { color: var(--primary); text-decoration: none; font-size: 14px; }

@media (min-width: 720px) {
  body { font-size: 15px; }
  .lesson-time { flex-basis: 110px; }
}

/* ---------- T2：按钮 / 表单 / 资料列表 ---------- */
.btn {
  display: inline-block;
  padding: 7px 14px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 600; }
.btn-danger  { background: var(--danger-bg); border-color: var(--danger-bg); color: var(--danger-fg); }
.btn-light   { background: #f2f3f5; color: var(--text); }
.btn-small   { padding: 4px 10px; font-size: 13px; }

.row-between { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.row-actions { display: flex; gap: 6px; flex: 0 0 auto; }

.search-bar { display: flex; gap: 8px; margin: 10px 0 4px; }
.search-bar input[type="search"] {
  flex: 1 1 auto;
  padding: 9px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.data-list { list-style: none; margin-top: 6px; }
.data-list > li {
  padding: 10px 0;
  border-top: 1px solid var(--border);
}
.data-list > li:first-child { border-top: none; }
.data-link { display: block; text-decoration: none; color: inherit; }
.data-title { font-weight: 600; font-size: 15px; }
.data-sub { font-size: 13px; color: var(--muted); margin-top: 2px; }
.teacher-row, .guardian-row, .avail-row {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 10px;
}
.avail-past { opacity: 0.55; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 14px;
  margin-top: 8px;
}
.form-grid label { font-size: 13px; color: var(--muted); display: block; }
.form-grid input, .form-grid select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 9px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  background: #fff;
}
.form-grid .span-2 { grid-column: 1 / -1; }
.form-section { font-size: 14px; margin: 6px 0 2px; }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 6px; }
.radio-row { display: flex !important; gap: 16px; }
.radio-row label { display: flex; align-items: center; gap: 4px; font-size: 14px; color: var(--text); }
.radio-row input { width: auto !important; margin: 0 !important; }

.inline-edit { display: flex; gap: 6px; align-items: center; flex: 0 0 auto; }
.inline-edit input {
  width: 90px;
  padding: 5px 8px;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.block-row {
  display: flex;
  gap: 6px;
  align-items: center;
  margin: 8px 0;
}
.block-row input[type="time"] { flex: 0 0 110px; padding: 7px 8px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.block-row input[type="text"] { flex: 1 1 auto; padding: 7px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }

.breadcrumb { margin: 2px 0 10px; font-size: 13px; }
.breadcrumb a { color: var(--primary); text-decoration: none; }
.small { font-size: 13px; }

.confirm-card { max-width: 480px; }
.confirm-lines { list-style: none; margin: 12px 0 18px; }
.confirm-lines li {
  padding: 8px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.confirm-lines li:first-child { border-top: none; }

@media (max-width: 560px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: 1; }
  .teacher-row, .guardian-row, .avail-row { flex-direction: column; }
  .row-actions { align-self: flex-start; }
}

/* ---------- T3：课表 / 调课 / 待办 / 今日工作台 ---------- */
.notice {
  background: var(--ok-bg);
  color: var(--ok-fg);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
  margin-bottom: 12px;
}
.warning-box {
  background: var(--warn-bg);
  color: var(--warn-fg);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
  margin-bottom: 12px;
}
.filter-bar { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.filter-bar select {
  padding: 7px 10px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}
.view-switch { display: flex; gap: 6px; }

.lesson-actions { display: flex; gap: 6px; flex: 0 0 auto; flex-wrap: wrap; justify-content: flex-end; }
.lesson-actions form { display: inline; }
.badge-mini { font-size: 11px; padding: 1px 6px; margin-left: 2px; }
.badge-正常 { background: var(--ok-bg); color: var(--ok-fg); }
.badge-已确认 { background: var(--ok-bg); color: var(--ok-fg); }
.badge-已取消 { background: #eef0f3; color: var(--muted); }
.lesson-已取消 .lesson-title,
.lesson-已取消 .lesson-sub,
.lesson-已取消 .lesson-time { text-decoration: line-through; color: var(--muted); }
.lesson-待确认 { background: #fffdf3; border-radius: 8px; }

.action-card .action-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.action-counts { margin-top: 10px; font-size: 13px; color: var(--muted); }
.action-counts strong { color: var(--text); }
.checkbox-row label { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text); }
.checkbox-row input { width: auto !important; margin: 0 !important; }

.week-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.week-grid { display: grid; grid-template-columns: repeat(7, minmax(140px, 1fr)); gap: 8px; min-width: 1000px; }
.week-day {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  min-height: 120px;
}
.week-today { border-color: var(--primary); }
.week-day-title { font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.week-day-title a { color: var(--text); text-decoration: none; }
.week-lesson {
  border-left: 3px solid var(--primary);
  background: #f7f9ff;
  border-radius: 6px;
  padding: 4px 6px;
  margin-bottom: 6px;
  font-size: 12px;
}
.week-lesson.lesson-待确认 { border-left-color: var(--warn-fg); background: #fffdf3; }
.week-lesson.lesson-已取消 { border-left-color: #ccc; background: #f5f5f5; text-decoration: line-through; }
.week-time { font-weight: 700; }
.week-title { font-weight: 600; }
.week-sub { color: var(--muted); }
.week-empty { color: var(--muted); font-size: 12px; text-align: center; padding: 12px 0; }

/* ---- T3.5：教室用途 + 练琴预约 ---- */
.usage-grid { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 4px; }
.usage-item { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text); font-weight: 400; }
.usage-item input { width: auto !important; margin: 0 !important; }
.form-label { font-size: 13px; font-weight: 600; color: var(--muted); }

.lesson-practice { border-left: 3px dashed var(--practice-fg, #7c5cd6); background: #f8f6ff; }
.badge-practice { background: #efe9ff; color: #6a4fc7; }
.badge-已预约 { background: #e8f4fd; color: #1b6ca8; }
.badge-待调整 { background: #fff3e0; color: #b26a00; }
.badge-已改期 { background: #e6f7ee; color: #1e7e4a; }
.badge-已取消 { background: #f1f1f1; color: #999; }

.week-practice { border-left: 3px dashed #7c5cd6; background: #f8f6ff; }