/* ==========================================================================
   UI 組件樣式 (Buttons, Modals, Forms, Badges, Toasts)
   ========================================================================== */

/* 按鈕設計 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  outline: none;
  line-height: 1.2;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-brand {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(168, 85, 247, 0.4);
}

.btn-brand:hover {
  box-shadow: 0 8px 24px rgba(236, 72, 153, 0.5);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-emerald {
  background: var(--accent-emerald);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.btn-emerald:hover {
  background: #059669;
}

.btn-amber {
  background: var(--accent-amber);
  color: #0f172a;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
}

.btn-amber:hover {
  background: #d97706;
  color: #ffffff;
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: #fda4af;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
  background: var(--accent-rose);
  color: #ffffff;
}

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: var(--radius-md);
  font-size: 1.2rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.15rem;
  border-radius: var(--radius-lg);
}

.btn-giant {
  padding: 18px 42px;
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: 1px;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5), 0 0 20px rgba(168, 85, 247, 0.4);
}

.btn-giant:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 36px rgba(99, 102, 241, 0.7), 0 0 30px rgba(236, 72, 153, 0.6);
}

/* 卡片與玻璃板 */
.card-panel {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  box-shadow: var(--shadow-sm);
}

/* 狀態數據 Bar */
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(18, 24, 41, 0.9);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 18px;
  margin-bottom: 16px;
  gap: 16px;
  flex-wrap: wrap;
}

.stats-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.stat-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 24px;
  padding: 0 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.88rem;
}

.badge-indigo {
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.2);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.2);
  color: #fcd34d;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-rose {
  background: rgba(244, 63, 94, 0.2);
  color: #fda4af;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.2);
  color: #67e8f9;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

/* 控制列 (Control Toolbar) */
.draw-controls-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(23, 31, 53, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.control-pill-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.form-select, .form-input {
  background: rgba(10, 14, 26, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-select:focus, .form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* 切換開關 Toggle Switch */
.toggle-switch-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.toggle-switch {
  position: relative;
  width: 40px;
  height: 22px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  transition: background 0.3s;
}

.toggle-switch-input {
  display: none;
}

.toggle-switch-slider {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.toggle-switch-input:checked + .toggle-switch {
  background: var(--accent-primary);
}

.toggle-switch-input:checked + .toggle-switch .toggle-switch-slider {
  transform: translateX(18px);
}

/* 彈出視窗 (Modal System) */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(5, 8, 16, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.modal-backdrop.show {
  display: flex;
  opacity: 1;
}

.modal-box {
  background: #141b2f;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 30px rgba(99, 102, 241, 0.15);
  transform: scale(0.95) translateY(10px);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.modal-backdrop.show .modal-box {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.02);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color 0.2s;
}

.modal-close-btn:hover {
  color: #ffffff;
}

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.02);
}

/* 拖曳上傳區 (Dropzone) */
.upload-dropzone {
  border: 2px dashed rgba(99, 102, 241, 0.4);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  background: rgba(99, 102, 241, 0.04);
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
}

.upload-dropzone:hover, .upload-dropzone.dragover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.dropzone-icon {
  font-size: 2.8rem;
  margin-bottom: 10px;
  display: block;
}

.dropzone-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.dropzone-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 快速範例載入按鈕區 */
.preset-chips-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  align-items: center;
}

.preset-chip {
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.preset-chip:hover {
  background: rgba(99, 102, 241, 0.2);
  color: #ffffff;
  border-color: var(--accent-primary);
}

/* 吐司通知 (Toast) */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 12px 20px;
  background: #1e293b;
  color: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border-left: 4px solid var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 500;
  animation: slideInToast 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast.toast-success {
  border-left-color: var(--accent-emerald);
}

.toast.toast-warn {
  border-left-color: var(--accent-amber);
}

.toast.toast-error {
  border-left-color: var(--accent-rose);
}

@keyframes slideInToast {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}