/* ===== 华政家教平台 — 共用样式（展示页 + 管理页）===== */
:root {
  --brand: #2e5fa3;
  --brand-dark: #24497e;
  --brand-light: #eaf1fa;
  --accent: #e8853b;
  --accent-dark: #d57427;
  --accent-light: #fcefe3;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --bg: #f6f7fa;
  --card: #ffffff;
  --border: #e5e7eb;
  --danger: #d64545;
  --success: #2f9e63;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 12px rgba(31, 41, 55, 0.06);
  --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.14);
}

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

html { -webkit-text-size-adjust: 100%; }

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

a { color: var(--brand); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ===== 顶部品牌区 ===== */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
}
.logo-mark {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.brand-text { min-width: 0; }
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: 0.5px; }
.brand-tagline { font-size: 12px; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-actions { margin-left: auto; display: flex; gap: 8px; }

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn-primary {
  background: var(--brand); border-color: var(--brand); color: #fff;
}
.btn-primary:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn-accent {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn-danger { color: var(--danger); }
.btn-danger:hover { border-color: var(--danger); color: var(--danger); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== 展示页：筛选栏 ===== */
.filters-bar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 20px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.filter-group label {
  display: block; font-size: 12px; color: var(--text-secondary); margin-bottom: 4px;
}
.filter-group select {
  width: 100%; padding: 8px 10px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; color: var(--text); background: #fff;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}
.filter-group select:focus { outline: none; border-color: var(--brand); }

/* ===== 展示页：老师卡片 ===== */
.teacher-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-bottom: 40px;
}
.teacher-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  display: flex; flex-direction: column; gap: 12px;
}
.teacher-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card-top { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--brand-light);
  color: var(--brand);
  font-size: 22px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.card-meta { min-width: 0; }
.t-name { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 6px; }
.gender-badge {
  font-size: 11px; font-weight: 500;
  color: var(--accent-dark); background: var(--accent-light);
  border-radius: 6px; padding: 1px 6px;
}
.t-school { font-size: 12px; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 12px; color: var(--brand); background: var(--brand-light);
  border-radius: 6px; padding: 2px 8px; font-weight: 500;
}
.tag.level-tag { color: var(--accent-dark); background: var(--accent-light); }
.card-slot { font-size: 12px; color: var(--text-secondary); }
.card-bottom {
  margin-top: auto; padding-top: 4px;
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px dashed var(--border);
  padding-top: 12px;
}
.price { color: var(--accent); font-weight: 700; font-size: 18px; }
.price span { font-size: 12px; font-weight: 400; color: var(--text-secondary); }
.card-cta { font-size: 13px; font-weight: 500; color: var(--brand); }

/* ===== 展示页：空态 ===== */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text-secondary);
  grid-column: 1 / -1;
}
.empty-state .emoji { font-size: 40px; display: block; margin-bottom: 10px; }

/* ===== 详情视图（抽屉式 overlay）===== */
.detail-overlay {
  position: fixed; inset: 0;
  background: rgba(31, 41, 55, 0.45);
  display: none; align-items: flex-end; justify-content: center;
  z-index: 100;
}
.detail-overlay.open { display: flex; }
.detail-panel {
  background: var(--card);
  width: 100%; max-width: 640px;
  border-radius: 20px 20px 0 0;
  max-height: 88vh; overflow-y: auto;
  animation: slideUp 0.25s ease;
  position: relative;
  padding: 24px 24px 20px;
}
@keyframes slideUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.detail-close {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px;
  border-radius: 50%; border: none;
  background: var(--bg); color: var(--text-secondary);
  font-size: 16px; display: flex; align-items: center; justify-content: center;
}
.detail-close:hover { background: var(--border); }
.detail-header { display: flex; gap: 16px; align-items: center; margin-bottom: 16px; }
.detail-header .avatar { width: 64px; height: 64px; font-size: 28px; }
.detail-name { font-size: 22px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.detail-school { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }
.detail-section { margin: 18px 0; }
.detail-section h4 {
  font-size: 13px; color: var(--text-secondary); font-weight: 600;
  margin-bottom: 6px; letter-spacing: 0.5px;
}
.detail-section p { font-size: 14px; }
.detail-achievement { font-size: 14px; }
.detail-achievement::before { content: "✓ "; color: var(--success); }
.detail-price-row {
  display: flex; align-items: baseline; gap: 6px; margin-top: 14px;
  padding-top: 14px; border-top: 1px dashed var(--border);
}
.detail-price-row .price { font-size: 26px; }
.detail-footer { margin-top: 20px; }
.detail-footer .btn { width: 100%; padding: 13px; font-size: 16px; border-radius: var(--radius-sm); }

/* ===== 预约联系卡片 ===== */
.contact-card {
  background: var(--brand-light);
  border: 1px solid #d3e2f6;
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 12px;
  display: none;
}
.contact-card.open { display: block; }
.contact-card p { font-size: 14px; margin-bottom: 10px; }
.contact-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: #fff; border-radius: var(--radius-sm);
  padding: 10px 12px; margin-bottom: 8px;
}
.contact-row .label { font-size: 12px; color: var(--text-secondary); }
.contact-row .value { font-size: 15px; font-weight: 600; word-break: break-all; }
.copy-btn { font-size: 12px; padding: 4px 10px; flex-shrink: 0; }
.toast {
  position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: #fff; font-size: 13px;
  padding: 10px 20px; border-radius: 20px;
  opacity: 0; pointer-events: none; transition: opacity 0.2s ease; z-index: 200;
}
.toast.show { opacity: 1; }

/* ===== 管理页：登录 ===== */
.admin-body { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 32px; width: 100%; max-width: 360px;
}
.login-card .logo-mark { width: 48px; height: 48px; font-size: 22px; margin-bottom: 16px; }
.login-card h1 { font-size: 20px; margin-bottom: 4px; }
.login-card .sub { font-size: 13px; color: var(--text-secondary); margin-bottom: 20px; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; }
.form-group input[type="password"],
.form-group input[type="text"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; font-family: inherit; color: var(--text); background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--brand);
}
.login-error { color: var(--danger); font-size: 13px; margin-bottom: 10px; min-height: 18px; }
.login-card .btn-primary { width: 100%; padding: 11px; font-size: 15px; }

/* ===== 管理页：工作台 ===== */
.admin-toolbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 16px 0;
}
.admin-toolbar h1 { font-size: 18px; font-weight: 700; }
.admin-toolbar .spacer { flex: 1; }
.table-wrap { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead { background: var(--brand-light); }
th { text-align: left; padding: 12px 14px; font-size: 12px; color: var(--text-secondary); font-weight: 600; letter-spacing: 0.3px; }
td { padding: 12px 14px; border-top: 1px solid var(--border); vertical-align: middle; }
tr:hover td { background: #fafbfd; }
.status-pill { font-size: 12px; padding: 2px 8px; border-radius: 6px; font-weight: 500; }
.status-on { color: var(--success); background: #e5f6ec; }
.status-off { color: var(--text-secondary); background: var(--bg); }
.row-actions { display: flex; gap: 6px; }
.empty-row td { text-align: center; color: var(--text-secondary); padding: 40px; }

/* ===== 管理页：编辑弹层 ===== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(31, 41, 55, 0.45);
  display: none; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal-panel {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  width: 100%; max-width: 620px; max-height: 88vh; overflow-y: auto;
  padding: 24px;
}
.modal-panel h2 { font-size: 18px; margin-bottom: 18px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.tag-input-row { display: flex; gap: 8px; }
.tag-input-row input { flex: 1; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chip {
  font-size: 12px; padding: 3px 10px; border-radius: 8px;
  background: var(--bg); border: 1px solid var(--border); cursor: pointer; color: var(--text-secondary);
  user-select: none;
}
.chip.active { background: var(--brand-light); border-color: var(--brand); color: var(--brand); font-weight: 500; }
.chip-x { display: inline-flex; align-items: center; gap: 4px; }
.chip-x .x { color: var(--text-secondary); font-weight: 700; margin-left: 2px; }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .teacher-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  body { font-size: 14px; }
  .filters-bar { grid-template-columns: repeat(2, 1fr); padding: 12px; }
  .teacher-grid { grid-template-columns: 1fr; gap: 14px; }
  .form-grid { grid-template-columns: 1fr; }
  .detail-panel { max-height: 92vh; }
  .brand-tagline { display: none; }
  .admin-toolbar .btn { flex: 1; }
  .table-wrap { overflow-x: auto; }
}