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

:root {
  --bg: #f4f6fb;
  --bg-gradient: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
  --card-bg: #ffffff;
  --card-border: #e6e9f0;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #eef2ff;
  --accent: #06b6d4;
  --sidebar-bg: #0f172a;
  --sidebar-hover: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active: #2563eb;
  --sidebar-border: #1e293b;
  --table-header-bg: #f8fafc;
  --table-border: #eef0f3;
  --input-bg: #ffffff;
  --input-border: #d1d5db;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
  --radius: 12px;
  --radius-sm: 8px;
}

[data-theme="emerald"] {
  --primary: #059669;
  --primary-dark: #047857;
  --primary-light: #ecfdf5;
  --accent: #10b981;
  --sidebar-bg: #064e3b;
  --sidebar-hover: #065f46;
  --sidebar-active: #10b981;
  --sidebar-border: #065f46;
}

[data-theme="midnight"] {
  --bg: #0f172a;
  --bg-gradient: linear-gradient(180deg, #111827 0%, #0f172a 100%);
  --card-bg: #1e293b;
  --card-border: #334155;
  --text: #e5e7eb;
  --text-secondary: #94a3b8;
  --primary: #818cf8;
  --primary-dark: #6366f1;
  --primary-light: #312e81;
  --accent: #22d3ee;
  --sidebar-bg: #0b1120;
  --sidebar-hover: #1e293b;
  --sidebar-text: #94a3b8;
  --sidebar-active: #6366f1;
  --sidebar-border: #1e293b;
  --table-header-bg: #273449;
  --table-border: #334155;
  --input-bg: #0f172a;
  --input-border: #475569;
  --danger: #f87171;
  --danger-light: #450a0a;
  --success: #34d399;
  --success-light: #064e3b;
  --warning: #fbbf24;
  --warning-light: #451a03;
  --shadow-md: 0 8px 24px rgba(0, 0, 0, .35);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  background-image: var(--bg-gradient);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 232px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  box-shadow: 2px 0 12px rgba(0,0,0,.08);
  z-index: 95;
}
.brand {
  padding: 20px 18px;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid var(--sidebar-border);
  letter-spacing: .3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
  flex-shrink: 0;
}
.sidebar nav { flex: 1; padding: 10px 0; overflow-y: auto; }
.sidebar nav a {
  display: block;
  padding: 11px 18px;
  color: var(--sidebar-text);
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: all .18s;
}
.sidebar nav a:hover { color: #fff; background: var(--sidebar-hover); }
.sidebar nav a.active { color: #fff; background: var(--sidebar-hover); border-left-color: var(--sidebar-active); }
.sidebar-footer { padding: 12px; border-top: 1px solid var(--sidebar-border); font-size: 13px; color: var(--sidebar-text); }
.sidebar-footer #user-info { margin-bottom: 8px; }

.main { margin-left: 232px; flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
  background: var(--card-bg);
  padding: 14px 24px;
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 40;
  box-shadow: var(--shadow-sm);
}
.topbar h1 { font-size: 19px; font-weight: 700; }
.club-name-label {
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--primary-light);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 999px;
  margin-right: 10px;
  font-weight: 600;
  white-space: nowrap;
}
.content { padding: 24px; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .2s;
  overflow: hidden;
  word-break: break-word;
  overflow-wrap: anywhere;
}
.card:hover { box-shadow: var(--shadow-md); }
.card h2 { font-size: 16px; margin-bottom: 12px; }

.btn {
  display: inline-block;
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  transition: all .2s;
  box-shadow: 0 1px 2px rgba(0,0,0,.05);
}
.btn:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 10px rgba(0,0,0,.1); }
.btn-primary { background: var(--primary); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #dc2626; }
.btn-secondary { background: #64748b; }
.btn-success { background: var(--success); }
.btn-success:hover { background: #059669; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { width: 100%; }
.btn-outline { background: transparent; border: 1px solid var(--input-border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); transform: none; }

input, select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 10px;
  background: var(--input-bg);
  color: var(--text);
  transition: border-color .2s, box-shadow .2s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
label { display: block; margin-bottom: 4px; font-weight: 500; color: var(--text-secondary); }

/*
 * 复选框/单选框不能跟着 input{width:100%} 一起撑满整行，
 * 否则同一行后面的文字会被挤到下一行（这是"选择框过大挤压其他元素"的常见元凶）。
 */
input[type="checkbox"], input[type="radio"] {
  width: 16px;
  height: 16px;
  min-width: 16px;
  padding: 0;
  margin: 0 6px 0 0;
  vertical-align: -3px;
  flex: 0 0 auto;
  accent-color: var(--primary);
}

.table { width: 100%; border-collapse: collapse; background: var(--card-bg); table-layout: auto; }
.table th, .table td { padding: 10px 12px; border-bottom: 1px solid var(--table-border); text-align: left; word-break: break-word; overflow-wrap: anywhere; white-space: normal; }
.table th { color: var(--text-secondary); font-weight: 600; background: var(--table-header-bg); }
.table tr:hover td { background: var(--primary-light); }
.table th:first-child, .table td:first-child { border-radius: 0; }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }

.modal-mask {
  position: fixed; inset: 0; background: rgba(15,23,42,.55);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 60px 20px; z-index: 100; overflow-y: auto;
  backdrop-filter: blur(3px);
}
.modal {
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px; width: 100%; max-width: 640px; padding: 22px;
  box-shadow: var(--shadow-md);
  animation: modalIn .18s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(8px) scale(.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal h3 { margin-bottom: 16px; font-size: 18px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

.error { color: var(--danger); margin: 8px 0; }
.hint { color: var(--text-secondary); font-size: 12px; margin-top: 10px; text-align: center; }

.login-body {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
  background: linear-gradient(135deg, #1e3a8a, #0f172a);
}
.login-card { background: var(--card-bg); padding: 34px; border-radius: 18px; width: 100%; max-width: 400px; box-shadow: var(--shadow-md); }
.login-card h1 { font-size: 20px; text-align: center; margin-bottom: 24px; color: var(--text); }
.login-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.login-tab { flex: 1; padding: 9px; border: 1px solid var(--card-border); background: var(--table-header-bg); border-radius: var(--radius-sm); font-size: 14px; color: var(--text); }
.login-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.stat {
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow-sm);
  position: relative; overflow: hidden;
}
.stat::after { content: ''; position: absolute; top: 0; right: 0; width: 70px; height: 70px; background: radial-gradient(circle at top right, var(--primary-light), transparent 70%); }
.stat .label { color: var(--text-secondary); font-size: 13px; }
.stat .value { font-size: 30px; font-weight: 800; margin-top: 6px; color: var(--primary); }
.stat-box { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow-sm); overflow: hidden; word-break: break-word; }
.stat-box .stat-label { color: var(--text-secondary); font-size: 13px; }
.stat-box .stat-value { font-size: 22px; font-weight: 800; margin-top: 6px; color: var(--primary); }
.stat-box .stat-sub { color: var(--text-secondary); font-size: 12px; margin-top: 4px; }

.toast {
  position: fixed; top: 20px; right: 20px; padding: 12px 18px; background: #111827; color: #fff;
  border-radius: 10px; opacity: 0; transition: opacity .3s; z-index: 200; pointer-events: none; box-shadow: var(--shadow-md);
}
.toast.show { opacity: 1; }
.pager { display: flex; gap: 8px; align-items: center; margin-top: 12px; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 500; }
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-orange { background: var(--warning-light); color: var(--warning); }
.badge-gray { background: var(--table-header-bg); color: var(--text-secondary); }

.sidebar-toggle { display: none; font-size: 20px; background: transparent; border: none; color: var(--text); margin-right: 10px; }
.topbar-left { display: flex; align-items: center; min-width: 0; }
.sidebar-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 90; display: none; }
.sidebar-overlay.show { display: block; }

.guardian-row { background: var(--table-header-bg); border: 1px solid var(--card-border) !important; border-radius: 10px; padding: 12px; margin-bottom: 8px; }

@media (max-width: 900px) {
  .layout { display: block; }
  .sidebar {
    width: 270px;
    transform: translateX(-100%);
    transition: transform .25s ease;
    z-index: 100;
  }
  .layout.sidebar-open .sidebar { transform: translateX(0); }
  .main { margin-left: 0; }
  .sidebar-toggle { display: inline-block; }
  .content { padding: 12px; }
  .topbar { padding: 10px 12px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  /*
   * 手机上表单默认一行两个：
   * 数字、姓名、日期、时间这类短字段各占半行，弹窗高度立刻降下来；
   * 真正需要整行的（备注、标题、文本域、长下拉框）在 HTML 里带 class="full"。
   */
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card { padding: 14px; overflow-x: auto; }
  .table { min-width: 680px; }
  .portal-content { padding: 12px; }
  /*
   * 手机弹窗排版：
   *  - 原来 align-items:flex-start + 20px 上边距，短弹窗下面会空出一大片，现在整体垂直居中；
   *  - 内容长的弹窗限高并在弹窗内部滚动，不再撑出屏幕；
   *  - 按钮等宽铺满，手指好点。
   */
  .modal-mask { align-items: center; padding: 14px 10px; }
  .modal {
    max-width: 100%;
    max-height: calc(100vh - 28px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 16px;
    border-radius: 14px;
  }
  .modal h3 { margin-bottom: 10px; font-size: 16px; }
  .modal .actions { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--card-border); }
  .modal .actions .btn { flex: 1; }
  .form-grid { gap: 10px; }
  /* 栅格/弹性子项默认 min-width:auto，长下拉框会把同行其它元素挤没，这里统一放开 */
  .form-grid > *, .modal .actions > * { min-width: 0; }
  .btn { font-size: 13px; padding: 7px 10px; }
  .login-card { width: 92%; }
  .topbar h1 { font-size: 17px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
}

/* 弹窗里的「一行一个学员/一行一个选项」结构：复选框占满剩余宽度，右侧下拉保持自然宽度 */
.m-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--card-border);
}
.m-row:last-child { border-bottom: 0; }
.m-row > label,
.m-row > .m-row-main {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-weight: 400;
  color: var(--text);
  word-break: break-word;
}
.m-row > select,
.m-row > input[type="number"] {
  width: auto;
  flex: 0 0 auto;
  min-width: 84px;
  margin-bottom: 0;
}
.m-row > .btn { flex: 0 0 auto; margin-bottom: 0; }

/* 下拉框在任何容器里都不要超出父级 */
select { max-width: 100%; }
/* 栅格自己已经有 gap，控件不要再带 10px 下边距，否则行距松垮 */
.form-grid input, .form-grid select, .form-grid textarea, .form-grid label { margin-bottom: 0; }
.modal input, .modal select, .modal textarea { margin-bottom: 0; }

@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .form-grid { gap: 8px; }
}

/* 超窄屏（≤340px）半行实在放不下，回退成整行 */
@media (max-width: 340px) {
  .form-grid { grid-template-columns: 1fr; }
}

/* 临时调配弹窗：可滚动列表 + 按原班级分组 */
.sched-temp-list {
  max-height: 52vh;
  overflow: auto;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 6px 10px;
}
.sched-temp-group { margin-bottom: 8px; }
.sched-temp-group:last-child { margin-bottom: 0; }
.sched-temp-group-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  padding: 6px 0 4px;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 2px;
}
/* 叠加层：必须盖在排课表单 modal（z-index:100）之上，且只关闭自己 */
.sched-temp-mask { z-index: 300; }
.sched-temp-modal { max-width: 520px; }
.sched-temp-modal h3 { margin-bottom: 8px; }
.sched-temp-list { max-height: 46vh; }
.sched-stu-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  padding: 5px 0;
  border-bottom: 1px solid var(--card-border);
}
.sched-stu-row:last-child { border-bottom: 0; }

/* 排课学员选择：小方块按行铺开，放不下才换行（名字最长 4 个汉字，没必要一人一行） */
.sched-stu-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
  padding: 5px 10px;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  background: var(--card-bg);
  font-size: 13px;
  line-height: 1.5;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
.sched-stu-chip input[type="checkbox"] { margin: 0; }
.sched-stu-chip.on {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}