/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-sm), 0 0 20px rgba(59,130,246,0.2);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), 0 0 30px rgba(59,130,246,0.3);
  color: #fff;
}

.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--color-text-primary);
  border: 1px solid rgba(255,255,255,0.1);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  color: var(--color-text-primary);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== Cards ===== */
.card {
  background: var(--color-bg-tertiary);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition);
}

.card:hover {
  border-color: rgba(59,130,246,0.3);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  background: var(--gradient-card);
  color: var(--color-accent);
  font-size: var(--text-2xl);
}

.card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.card p { color: var(--color-text-tertiary); font-size: var(--text-sm); margin-bottom: 0; }

/* ===== Badge ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: 100px;
  font-size: var(--text-xs);
  font-weight: 500;
}

.badge-blue { background: rgba(59,130,246,0.15); color: var(--color-accent); }
.badge-purple { background: rgba(139,92,246,0.15); color: var(--color-purple); }
.badge-cyan { background: rgba(6,182,212,0.15); color: var(--color-cyan); }
.badge-green { background: rgba(16,185,129,0.15); color: var(--color-green); }
.badge-amber { background: rgba(245,158,11,0.15); color: var(--color-amber); }

/* ===== Forms ===== */
.form-group { margin-bottom: var(--space-4); }

.form-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-primary);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

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

/* ===== Tables ===== */
.table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-tertiary);
  color: var(--color-text-tertiary);
  font-weight: 500;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

th:hover { color: var(--color-text-secondary); }
th .sort-icon { margin-left: var(--space-1); opacity: 0.4; }
th.sorted .sort-icon { opacity: 1; color: var(--color-accent); }

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  color: var(--color-text-secondary);
}

tr:hover td { background: rgba(255,255,255,0.02); }

/* ===== Code Tabs ===== */
.code-tabs {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.code-tab-bar {
  display: flex;
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-tab {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
}

.code-tab:hover { color: var(--color-text-secondary); }
.code-tab.active {
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  box-shadow: inset 0 -2px 0 var(--color-accent);
}

.code-panel { display: none; position: relative; }
.code-panel.active { display: block; }

.code-panel pre {
  margin: 0;
  border: none;
  border-radius: 0;
}

.copy-btn {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  padding: var(--space-1) var(--space-2);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover { background: rgba(255,255,255,0.15); color: var(--color-text-primary); }
.copy-btn.copied { color: var(--color-green); }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-overlay.open { opacity: 1; visibility: visible; }

.modal {
  background: var(--color-bg-secondary);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--transition);
}

.modal-overlay.open .modal { transform: scale(1); }

.modal h3 { margin-bottom: var(--space-4); }

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  top: calc(var(--header-height) + var(--space-4));
  right: var(--space-4);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toast {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  background: var(--color-bg-elevated);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  max-width: 360px;
}

.toast-success { border-left: 3px solid var(--color-green); }
.toast-error { border-left: 3px solid var(--color-red); }
.toast-info { border-left: 3px solid var(--color-accent); }

@keyframes toastIn { from { opacity: 0; transform: translateX(100%); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; transform: translateY(-10px); } }

/* ===== Accordion ===== */
.accordion-item {
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  cursor: pointer;
  text-align: left;
}

.accordion-trigger::after {
  content: '+';
  font-size: var(--text-xl);
  color: var(--color-text-tertiary);
  transition: transform var(--transition);
}

.accordion-item.open .accordion-trigger::after {
  content: '-';
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-item.open .accordion-content {
  max-height: 500px;
}

.accordion-content p {
  padding-bottom: var(--space-4);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

/* ===== Spinner ===== */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============ P2-11 手机端响应式 ============ */
@media (max-width: 640px) {
  /* 表格水平滚动 */
  .table-wrap, .data-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .data-table { white-space: nowrap; }

  /* 标签栏水平滚动 */
  .tab-bar, .dash-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; flex-wrap: nowrap !important; }
  .tab-btn, .dash-tab { white-space: nowrap; flex-shrink: 0; }

  /* nav.actions: 隐藏立即注册文字, 只留主题切换+菜单 */
  .nav-actions .btn { padding: 6px 10px; font-size: 12px; }
  .theme-toggle { padding: 4px 6px !important; }

  /* 卡片内 padding 减小 */
  .card { padding: var(--space-4) !important; }
  .hero { padding-top: 80px !important; padding-bottom: 40px !important; }
  .hero h1 { font-size: var(--text-3xl) !important; }
  .pricing-card, .feature-card { padding: var(--space-4) !important; }

  /* 控制台数据网格 */
  .stat-grid { grid-template-columns: 1fr 1fr !important; gap: var(--space-3) !important; }

  /* footer 列堆叠 */
  .footer-grid { grid-template-columns: 1fr !important; gap: var(--space-6) !important; }

  /* admin toolbar 折行 */
  .toolbar { flex-direction: column; align-items: stretch; gap: var(--space-2); }
  .toolbar-group { flex-wrap: wrap; }
}