/* ============================================
   admin.css — Admin Dashboard Styles
   卡丁车赛事资讯平台 - 管理后台: 表单, 表格, 上传, 导入
   ============================================ */

/* ===== ADMIN LAYOUT ===== */
.admin-layout {
  max-width: 1000px;
  margin: 100px auto 60px;
  padding: 0 24px;
}

.admin-header {
  margin-bottom: 40px;
}

.admin-header h1 {
  font-size: 28px;
  font-weight: 900;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-white), var(--racing-red-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.admin-header p {
  font-size: 14px;
  color: var(--text-muted);
}

.admin-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition-fast);
  letter-spacing: 0.5px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  box-shadow: var(--shadow-red-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--racing-red-light), var(--racing-red));
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--card-dark);
  color: var(--text-light);
  border: 1px solid var(--border-gray) !important;
}

.btn-secondary:hover {
  border-color: var(--racing-red-dim) !important;
  background: rgba(232,0,45,0.1);
}

.btn-danger {
  background: rgba(232,0,45,0.12);
  color: var(--racing-red-light);
  border: 1px solid rgba(232,0,45,0.25) !important;
}

.btn-danger:hover {
  background: var(--racing-red);
  color: var(--text-white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 12px;
}

/* ===== FORM MODAL ===== */
.form-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}

.form-overlay.open {
  display: flex;
}

.form-modal {
  background: var(--card-dark);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  padding: 36px;
  animation: modalIn 0.35s cubic-bezier(0.34,1.56,0.64,1);
  margin: auto;
  position: relative;
}

.form-modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--racing-red), var(--flame-orange), var(--racing-red));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.form-modal h2 {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 28px;
  background: linear-gradient(135deg, var(--text-white), var(--racing-red-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--carbon-dark);
  border: 1px solid var(--border-gray);
  border-radius: var(--radius-sm);
  color: var(--text-light);
  padding: 14px 16px;
  font-size: 14px;
  outline: none;
  transition: var(--transition-fast);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--racing-red);
  box-shadow: 0 0 0 3px rgba(232,0,45,0.12);
}

.form-group select option {
  background: var(--card-dark);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 32px;
}

/* ===== ADMIN TABLE ===== */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.admin-table th {
  background: linear-gradient(135deg, var(--carbon-dark), var(--card-dark));
  padding: 16px;
  text-align: left;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--racing-red-dim);
}

.admin-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border-gray);
  font-size: 14px;
  vertical-align: middle;
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background: rgba(232,0,45,0.05);
}

.admin-table-city {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  color: var(--text-white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
  white-space: nowrap;
  display: inline-block;
}

.admin-table-status {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  display: inline-block;
}

.admin-table-status.open {
  background: rgba(0,200,83,0.15);
  color: var(--status-green);
}

.admin-table-status.upcoming {
  background: rgba(255,179,0,0.15);
  color: var(--status-gold);
}

.admin-table-status.ended {
  background: rgba(85,85,85,0.15);
  color: var(--text-dim);
}

/* ===== IMPORT TABS ===== */
.import-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-gray);
  padding-bottom: 16px;
}

.import-tab {
  background: var(--card-dark);
  border: 1px solid var(--border-gray);
  color: var(--text-muted);
  padding: 10px 24px;
  border-radius: 30px;
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-weight: 600;
}

.import-tab:hover {
  border-color: var(--racing-red-dim);
  color: var(--text-light);
}

.import-tab.active {
  background: linear-gradient(135deg, var(--racing-red), var(--racing-red-dim));
  border-color: var(--racing-red);
  color: var(--text-white);
  box-shadow: var(--shadow-red-glow);
}

/* ===== UPLOAD ZONE ===== */
.upload-zone {
  border: 2px dashed var(--border-gray);
  border-radius: var(--radius-lg);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  overflow: hidden;
  position: relative;
  background: var(--carbon-dark);
}

.upload-zone:hover {
  border-color: var(--racing-red);
  background: rgba(232,0,45,0.04);
}

.upload-zone.drag-over {
  border-color: var(--racing-red);
  background: rgba(232,0,45,0.08);
}

.upload-placeholder {
  text-align: center;
  pointer-events: none;
  color: var(--text-muted);
  padding: 40px;
}

.upload-preview {
  width: 100%;
  position: relative;
}

.upload-preview img {
  width: 100%;
  max-height: 360px;
  object-fit: contain;
  display: block;
  background: var(--asphalt-black);
}

.upload-remove {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0,0,0,0.8);
  color: var(--text-white);
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 12px;
  transition: var(--transition-fast);
}

.upload-remove:hover {
  background: var(--racing-red);
}

/* ===== STATUS MESSAGES ===== */
.import-status {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: block;
  margin: 16px 0;
}

.import-status.loading {
  background: rgba(255,179,0,0.1);
  color: var(--status-gold);
  border: 1px solid rgba(255,179,0,0.25);
}

.import-status.success {
  background: rgba(0,200,83,0.1);
  color: var(--status-green);
  border: 1px solid rgba(0,200,83,0.25);
}

.import-status.error {
  background: rgba(232,0,45,0.1);
  color: var(--racing-red-light);
  border: 1px solid rgba(232,0,45,0.25);
}

.import-status.warn {
  background: rgba(255,179,0,0.08);
  color: var(--status-gold);
  border: 1px solid rgba(255,179,0,0.2);
}

/* ===== DETECT BANNER ===== */
.detect-banner {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.detect-banner.pass {
  background: rgba(0,200,83,0.1);
  border: 1px solid rgba(0,200,83,0.3);
  color: var(--status-green);
}

.detect-banner.warn {
  background: rgba(255,179,0,0.1);
  border: 1px solid rgba(255,179,0,0.3);
  color: var(--status-gold);
}

.detect-banner.fail {
  background: rgba(232,0,45,0.1);
  border: 1px solid rgba(232,0,45,0.3);
  color: var(--racing-red-light);
}

.detect-banner-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.detect-banner-text {
  flex: 1;
}

.detect-banner-title {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 4px;
}

.detect-banner-sub {
  font-size: 13px;
  opacity: 0.85;
}

/* ===== FIELD HINTS ===== */
.field-hint {
  font-weight: 400;
  font-size: 11px;
  margin-left: 6px;
}

.field-hint.ok {
  color: var(--status-green);
}

.field-hint.missing {
  color: var(--racing-red-light);
}