@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&display=swap');

:root {
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Google Stitch Monochrome Palette */
  --stitch-black: #050505;
  --stitch-dark: #121212;
  --stitch-gray-900: #18181b;
  --stitch-gray-800: #27272a;
  --stitch-gray-700: #3f3f46;
  --stitch-gray-500: #71717a;
  --stitch-gray-400: #a1a1aa;
  --stitch-gray-300: #d4d4d8;
  --stitch-gray-200: #e4e4e7;
  --stitch-gray-100: #f4f4f5;
  --stitch-gray-50: #fafafa;
  --stitch-white: #ffffff;

  --stitch-border: #e4e4e7;
  --stitch-border-dark: #27272a;
  --stitch-focus: #000000;
  --stitch-surface: #ffffff;
  --stitch-canvas: #fbfbfb;

  --shadow-crisp: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px -1px rgba(0, 0, 0, 0.03);
  --shadow-elevation: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--stitch-canvas);
  color: var(--stitch-black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* Typography Helpers */
.font-sans {
  font-family: var(--font-sans);
}

.font-mono {
  font-family: var(--font-mono);
}

/* Custom Minimalist Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--stitch-gray-300);
  border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--stitch-gray-400);
}

.dark-scroll::-webkit-scrollbar-thumb {
  background: var(--stitch-gray-700);
}

.dark-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--stitch-gray-500);
}

/* High-Contrast Inputs */
.stitch-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.4;
  color: var(--stitch-black);
  background-color: var(--stitch-white);
  border: 1px solid var(--stitch-border);
  border-radius: 6px;
  padding: 7px 10px;
  transition: all 0.15s ease;
}

.stitch-input:focus {
  outline: none;
  border-color: var(--stitch-black);
  box-shadow: 0 0 0 1px var(--stitch-black);
}

.stitch-input:disabled {
  background-color: var(--stitch-gray-100);
  color: var(--stitch-gray-500);
  cursor: not-allowed;
}

.stitch-input-sm {
  font-size: 12px;
  padding: 5px 8px;
}

.stitch-textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.5;
  color: var(--stitch-black);
  background-color: var(--stitch-white);
  border: 1px solid var(--stitch-border);
  border-radius: 6px;
  padding: 8px 10px;
  transition: all 0.15s ease;
  resize: vertical;
  min-height: 70px;
}

.stitch-textarea:focus {
  outline: none;
  border-color: var(--stitch-black);
  box-shadow: 0 0 0 1px var(--stitch-black);
}

/* Label styling */
.stitch-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--stitch-gray-500);
  margin-bottom: 4px;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  background-color: var(--stitch-black);
  color: var(--stitch-white);
  border: 1px solid var(--stitch-black);
  border-radius: 7px;
  padding: 7px 14px;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-crisp);
  user-select: none;
}

.btn-primary:hover {
  background-color: #222222;
  border-color: #222222;
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  background-color: var(--stitch-white);
  color: var(--stitch-black);
  border: 1px solid var(--stitch-border);
  border-radius: 7px;
  padding: 7px 12px;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.btn-secondary:hover {
  background-color: var(--stitch-gray-50);
  border-color: var(--stitch-gray-300);
}

.btn-secondary:active {
  transform: scale(0.98);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--stitch-border);
  background-color: var(--stitch-white);
  color: var(--stitch-gray-700);
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.btn-icon:hover {
  background-color: var(--stitch-gray-100);
  color: var(--stitch-black);
  border-color: var(--stitch-gray-400);
}

.btn-icon:active {
  transform: scale(0.95);
}

.btn-icon-danger {
  color: #71717a;
}

.btn-icon-danger:hover {
  background-color: #fef2f2;
  color: #dc2626;
  border-color: #fca5a5;
}

/* Preset buttons */
.preset-btn {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 11px;
  border-radius: 6px;
  border: 1px solid var(--stitch-border);
  background-color: var(--stitch-white);
  color: var(--stitch-gray-700);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.preset-btn:hover {
  background-color: var(--stitch-gray-50);
  color: var(--stitch-black);
}

.preset-btn.active {
  background-color: var(--stitch-black);
  color: var(--stitch-white);
  border-color: var(--stitch-black);
  font-weight: 600;
}

/* Badges */
.badge-mono {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  background-color: var(--stitch-gray-100);
  color: var(--stitch-gray-800);
  border: 1px solid var(--stitch-border);
}

/* Card Styling */
.stitch-card {
  background-color: var(--stitch-white);
  border: 1px solid var(--stitch-border);
  border-radius: 10px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.stitch-card:hover {
  border-color: var(--stitch-gray-300);
}

.stitch-card.disabled-card {
  opacity: 0.6;
  background-color: #fafafa;
}

/* Section Header Bar */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid transparent;
  user-select: none;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.section-header:hover {
  background-color: var(--stitch-gray-50);
}

.section-header.expanded {
  border-bottom-color: var(--stitch-border);
}

/* Accordion Content */
.section-body {
  padding: 14px;
  background-color: var(--stitch-white);
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
}

.section-body.collapsed {
  display: none;
}

/* Nested Items */
.item-card {
  background-color: var(--stitch-gray-50);
  border: 1px solid var(--stitch-border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 10px;
  transition: all 0.15s ease;
}

.item-card:hover {
  border-color: var(--stitch-gray-300);
}

/* Checkboxes */
.stitch-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--stitch-gray-400);
  border-radius: 4px;
  background-color: var(--stitch-white);
  cursor: pointer;
  display: inline-grid;
  place-content: center;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.stitch-checkbox:hover {
  border-color: var(--stitch-black);
}

.stitch-checkbox:checked {
  background-color: var(--stitch-black);
  border-color: var(--stitch-black);
}

.stitch-checkbox:checked::before {
  content: "";
  width: 8px;
  height: 5px;
  border-left: 2px solid white;
  border-bottom: 2px solid white;
  transform: rotate(-45deg) translate(1px, -1px);
}

/* Latency Pulse */
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.pulse-dot {
  animation: pulse-dot 1.8s infinite ease-in-out;
}

/* Toast Notifications */
#toastContainer {
  position: fixed;
  bottom: 20px;
  right: 24px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background-color: var(--stitch-black);
  color: var(--stitch-white);
  font-size: 13px;
  font-weight: 500;
  border-radius: 8px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.25);
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-error {
  background-color: #18181b;
  border: 1px solid #7f1d1d;
  color: #fca5a5;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--stitch-white);
  border: 1px solid var(--stitch-border);
  border-radius: 12px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 500px;
  transform: scale(0.96);
  transition: transform 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

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

/* Loading Spinner */
.spinner {
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: white;
  border-radius: 50%;
  width: 14px;
  height: 14px;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

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

/* Reorder arrow animations */
.reorder-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

/* Responsive Split screen */
@media (max-width: 1024px) {
  #splitLayout {
    flex-direction: column;
    overflow-y: auto;
  }
  #leftEditorPanel, #rightPreviewPanel {
    width: 100% !important;
    height: auto !important;
  }
}