/* ======================================
   财务支出登记表系统 - 样式
   响应式设计 · 简洁专业
   ====================================== */

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #f59e0b;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 6px rgba(0,0,0,0.07), 0 10px 15px rgba(0,0,0,0.1);
  --transition: all 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--gray-100);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ========== 登录页 ========== */
#login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #1d4ed8 100%);
}

.login-container { width: 100%; max-width: 400px; padding: 20px; }

.login-card {
  background: white;
  border-radius: 16px;
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

.login-header { text-align: center; margin-bottom: 32px; }

.login-header h1 {
  font-size: 24px;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.login-subtitle {
  font-size: 14px;
  color: var(--gray-500);
}

/* ========== 导航栏 ========== */
.navbar {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.nav-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--gray-900);
  white-space: nowrap;
}

.nav-menu { display: flex; gap: 4px; flex: 1; }

.nav-btn {
  background: none;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  color: var(--gray-600);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-btn:hover { background: var(--gray-100); color: var(--gray-900); }
.nav-btn.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }

.nav-user {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  white-space: nowrap;
}

.user-info {
  font-size: 14px;
  color: var(--gray-600);
}

/* 底部导航（移动端） */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  border-top: 1px solid var(--gray-200);
  z-index: 100;
  padding: 4px 0;
  padding-bottom: env(safe-area-inset-bottom, 4px);
}

.bottom-nav-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 8px 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--gray-500);
  font-size: 12px;
  transition: var(--transition);
}

.bottom-nav-btn.active { color: var(--primary); font-weight: 600; }
.nav-icon { font-size: 20px; }

/* ========== 主内容 ========== */
.main-content {
  padding: 80px 24px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.page-content { display: none; }
.page-content.active { display: block; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

h2 { font-size: 22px; color: var(--gray-900); margin-bottom: 20px; }
h3 { font-size: 16px; color: var(--gray-700); margin-bottom: 12px; }

/* ========== 组件 ========== */
.card {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.stat-card {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  text-align: center;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin: 8px 0;
}

.stat-card .stat-label { font-size: 13px; color: var(--gray-500); }
.stat-card .stat-change { font-size: 13px; margin-top: 4px; }
.stat-card .stat-change.up { color: var(--danger); }
.stat-card .stat-change.down { color: var(--success); }

.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.chart-card {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.chart-card canvas { max-height: 280px; }

/* ========== 表单 ========== */
.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-input,
.form-select,
select,
input[type="text"],
input[type="password"],
input[type="date"],
input[type="number"],
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--gray-800);
  background: white;
  transition: var(--transition);
}

.form-input:focus,
select:focus,
input:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

textarea { resize: vertical; min-height: 80px; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 16px;
  width: 100%;
}

.filter-bar .form-input,
.filter-bar select {
  width: auto;
  min-width: 0;
  flex: 0 1 auto;
  max-width: 180px;
}

.filter-bar input[type="date"] {
  width: 140px;
}

.filter-bar select {
  width: 120px;
}

.filter-bar input[type="text"] {
  width: 150px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  gap: 6px;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #15803d; }

.btn-outline {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

.btn-outline:hover { background: var(--gray-50); border-color: var(--gray-400); }

.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ========== 表格 ========== */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  table-layout: auto;
}

.table th {
  background: var(--gray-50);
  padding: 12px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--gray-600);
  border-bottom: 2px solid var(--gray-200);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

.table th:hover { color: var(--primary); }

.table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
  vertical-align: middle;
  line-height: 1.4;
}

.table tr:hover td { background: var(--gray-50); }

.table .actions {
  display: flex;
  gap: 4px;
  white-space: nowrap;
  align-items: center;
  justify-content: center;
}

.table-amount { font-weight: 700; font-family: 'Courier New', monospace; }

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ========== 分页 ========== */
.pagination {
  display: flex;
  gap: 4px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.pagination button {
  padding: 6px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  background: white;
  cursor: pointer;
  font-size: 13px;
  transition: var(--transition);
}

.pagination button:hover { background: var(--gray-100); }
.pagination button.active { background: var(--primary); color: white; border-color: var(--primary); }
.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== 模态框 ========== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-content {
  background: white;
  border-radius: 16px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 { margin: 0; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--gray-400); padding: 4px; line-height: 1; }
.modal-close:hover { color: var(--gray-800); }
.modal-body { padding: 24px; }

/* ========== 标签页 ========== */
.reports-tabs,
.settings-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 8px 20px;
  border: 1px solid var(--gray-200);
  background: white;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  color: var(--gray-600);
  transition: var(--transition);
}

.tab-btn:hover { background: var(--gray-50); }
.tab-btn.active { background: var(--primary); color: white; border-color: var(--primary); }

/* ========== 空状态 ========== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--gray-400);
}

.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }

/* ========== 消息 ========== */
.error-message {
  background: #fef2f2;
  color: var(--danger);
  padding: 10px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}

.success-message {
  background: #f0fdf4;
  color: var(--success);
  padding: 10px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}

/* ========== Toast 通知 ========== */
.toast-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 2000;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius);
  margin-bottom: 8px;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  max-width: 360px;
}

.toast-success { background: var(--success); color: white; }
.toast-error { background: var(--danger); color: white; }
.toast-info { background: var(--primary); color: white; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .navbar { display: none; }
  .bottom-nav { display: flex; }
  .main-content { padding: 16px 16px 72px; }

  .charts-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .filter-bar .form-input,
  .filter-bar select { min-width: 100px; max-width: 100%; }

  .login-card { padding: 24px; }
  .card { padding: 16px; }
  .chart-card { padding: 16px; }

  h2 { font-size: 18px; }
  .table { font-size: 13px; }
  .table th, .table td { padding: 8px 10px; white-space: nowrap; }
  .table .actions { white-space: nowrap; min-width: 100px; }

  .page-header { flex-direction: column; gap: 12px; align-items: stretch; }
  .page-header .btn { width: 100%; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-card { padding: 12px; }
  .stat-card .stat-value { font-size: 22px; }
}

/* 凭证号标签 */
.badge-voucher {
  display: inline-block;
  background: #eef2ff;
  color: #4338ca;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
  font-family: monospace;
}