/* CalGen - Modern Responsive Stylesheet */
:root {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-hover: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-focus: #6366f1;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-border: #c7d2fe;
  --success: #10b981;
  --success-light: #ecfdf5;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0b0f19;
    --bg-surface: #111827;
    --bg-surface-elevated: #1f2937;
    --bg-hover: #1e293b;
    --text-primary: #f9fafb;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border: #1e293b;
    --border-focus: #818cf8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.15);
    --primary-border: rgba(99, 102, 241, 0.3);
    --success: #34d399;
    --success-light: rgba(16, 185, 129, 0.15);
    --danger: #f87171;
    --danger-light: rgba(239, 68, 68, 0.15);
    --warning: #fbbf24;
    --warning-light: rgba(245, 158, 11, 0.15);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
  }
}

/* Base reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 60px;
  flex: 1;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-md);
}

.brand-title h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 9999px;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.brand-title p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  gap: 8px;
}

/* Card components */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  transition: all 0.2s ease;
}

/* PWA Install Banner */
.install-banner {
  display: none;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%);
  border: 1px solid var(--primary-border);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.install-banner.show {
  display: flex;
}

.install-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* Input Section */
.input-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.input-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.input-toggles {
  display: flex;
  align-items: center;
  gap: 16px;
}

.toggle-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.toggle-item input[type="checkbox"] {
  accent-color: var(--primary);
  cursor: pointer;
  width: 15px;
  height: 15px;
}

.textarea-container {
  position: relative;
}

.schedule-textarea {
  width: 100%;
  min-height: 110px;
  padding: 14px 16px;
  font-size: 0.95rem;
  line-height: 1.6;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  resize: vertical;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.schedule-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.schedule-textarea::placeholder {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.char-counter {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  pointer-events: none;
}

/* Preset Chips */
.presets-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  align-items: center;
}

.presets-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.preset-chip {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.preset-chip:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

/* Parsed Preview Box */
.preview-card {
  display: none;
  margin-top: 16px;
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  animation: fadeIn 0.25s ease;
}

.preview-card.show {
  display: block;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.preview-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.preview-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.preview-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Action Buttons */
.input-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  user-select: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 1px 2px rgba(79, 70, 229, 0.2);
}

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

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.btn-danger-outline {
  background: transparent;
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.3);
}

.btn-danger-outline:hover {
  background: var(--danger-light);
  border-color: var(--danger);
}

/* Schedule List Section */
.schedules-section {
  margin-top: 28px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 10px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.05rem;
  font-weight: 700;
}

.count-badge {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 9999px;
  font-weight: 600;
}

.section-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Schedule Cards List */
.schedules-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.schedule-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  position: relative;
}

.schedule-card:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.schedule-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.card-title-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  word-break: break-word;
}

.time-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
}

.time-tag.today {
  background: var(--success-light);
  color: var(--success);
}

.time-tag.tomorrow {
  background: var(--primary-light);
  color: var(--primary);
}

.time-tag.future {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.schedule-details {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.detail-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.detail-item a {
  color: var(--primary);
  text-decoration: none;
}

.detail-item a:hover {
  text-decoration: underline;
}

.card-raw-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-hover);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: pre-wrap;
  word-break: break-word;
}

.card-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
  margin-top: 4px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  background: var(--bg-surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

.empty-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 12px;
  color: var(--text-muted);
  opacity: 0.6;
}

.empty-state h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.empty-state p {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 320px;
  margin: 0 auto;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  background: #1e293b;
  color: #f8fafc;
  padding: 10px 18px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.toast.success {
  background: #065f46;
  color: #d1fae5;
}

.toast.info {
  background: #1e293b;
}

/* Footer */
.footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 24px 16px;
  border-top: 1px solid var(--border);
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* AI Engine Badges */
.engine-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 9999px;
  background: var(--bg-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.engine-badge.ai {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.12) 0%, rgba(124, 58, 237, 0.12) 100%);
  color: var(--primary);
  border-color: var(--primary-border);
}

.engine-badge.local {
  background: var(--bg-hover);
  color: var(--text-muted);
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 16px;
}

.modal-dialog {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: fadeIn 0.2s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.btn-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
}

.btn-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  padding: 12px 20px;
  background: var(--bg-hover);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 8px 12px;
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

/* Spinner */
.spinner {
  width: 12px;
  height: 12px;
  border: 2px solid var(--primary-border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Mobile responsive */
@media (max-width: 640px) {
  .container {
    padding: 16px 12px 40px;
  }
  
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .card {
    padding: 16px;
  }
  
  .input-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .section-controls {
    width: 100%;
    justify-content: space-between;
  }
  
  .card-actions {
    justify-content: stretch;
  }
  
  .card-actions .btn {
    flex: 1;
  }
}