:root {
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --transition: 0.38s cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-soft: 0 18px 50px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
  --accent: #6366f1;
  --accent-dim: #4f46e5;
  --text: #0f172a;
  --muted: #64748b;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-2: rgba(248, 250, 252, 0.85);
  --border: rgba(148, 163, 184, 0.35);
  --page-bg: #e8eef9;
  --blob-1: rgba(99, 102, 241, 0.35);
  --blob-2: rgba(14, 165, 233, 0.25);
}

html.theme-dark {
  --text: #e2e8f0;
  --muted: #94a3b8;
  --surface: rgba(15, 23, 42, 0.78);
  --surface-2: rgba(30, 41, 59, 0.92);
  --border: rgba(148, 163, 184, 0.22);
  --page-bg: #020617;
  --shadow-soft: 0 22px 60px rgba(0, 0, 0, 0.45);
  --blob-1: rgba(99, 102, 241, 0.2);
  --blob-2: rgba(56, 189, 248, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font);
  color: var(--text);
  background: var(--page-bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: radial-gradient(1200px 600px at 10% -10%, var(--blob-1), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, var(--blob-2), transparent 50%),
    var(--page-bg);
  transition: background 0.45s ease;
}

.app {
  max-width: 1480px;
  margin: 0 auto;
  padding: 20px 18px 100px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.glass-panel {
  background: var(--surface);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft), var(--shadow-glow);
  transition: background var(--transition), border-color 0.3s ease, box-shadow 0.35s ease,
    transform 0.25s ease;
}

.top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
}

.top-bar__brand {
  display: flex;
  gap: 14px;
  align-items: center;
}

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #22d3ee);
  box-shadow: 0 10px 28px rgba(99, 102, 241, 0.35);
}

.top-bar__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.top-bar__sub {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.top-bar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(300px, 380px) 1fr;
  gap: 18px;
  align-items: stretch;
  min-height: 520px;
}

.controls {
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 220px);
  position: sticky;
  top: 16px;
}

.controls__scroll {
  overflow: auto;
  padding: 18px 16px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel-block {
  padding: 4px 4px 12px;
}

.panel-heading {
  margin: 0 0 10px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 600;
}

.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

.hint {
  margin: 8px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 14px 0;
}

.input,
.select,
.btn {
  font-family: inherit;
  border-radius: var(--radius-sm);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease,
    transform 0.2s ease;
}

.input,
.select {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  padding: 11px 12px;
  font-size: 0.95rem;
}

.input:focus,
.select:focus,
.btn:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}

.input--area {
  resize: vertical;
  min-height: 100px;
  line-height: 1.45;
}

.select--compact {
  width: auto;
  min-width: 120px;
}

.touch-target {
  min-height: 44px;
}

.btn {
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 10px 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

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

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #fff;
  box-shadow: 0 10px 26px rgba(99, 102, 241, 0.35);
}

.btn--primary:hover {
  filter: brightness(1.05);
}

.btn--secondary {
  background: color-mix(in srgb, var(--surface-2) 90%, var(--accent) 10%);
  color: var(--text);
  border-color: var(--border);
}

.btn--secondary:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

.btn--ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}

.btn--ghost:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
}

.row {
  display: flex;
  align-items: flex-end;
}

.gap-sm {
  gap: 8px;
}

.mt-sm {
  margin-top: 10px;
}

.flex-1 {
  flex: 1;
}

.accordion {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.accordion:hover {
  border-color: color-mix(in srgb, var(--accent) 22%, var(--border));
}

.accordion summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 14px;
  font-weight: 600;
  font-size: 0.92rem;
  user-select: none;
  transition: background 0.25s ease;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion summary::after {
  content: "▾";
  float: right;
  opacity: 0.45;
  transition: transform 0.35s ease;
}

.accordion[open] summary::after {
  transform: rotate(-180deg);
}

.accordion summary:hover {
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.accordion__body {
  padding: 0 14px 16px;
}

.grid-colors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 12px;
}

.color-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
}

.color-field input[type="color"] {
  width: 100%;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 0.88rem;
  margin-top: 8px;
  user-select: none;
}

.toggle--compact {
  margin-top: 0;
  font-size: 0.82rem;
}

.toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle__ui {
  width: 44px;
  height: 26px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--muted) 35%, var(--border));
  position: relative;
  flex-shrink: 0;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}

.toggle__ui::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  top: 3px;
  left: 4px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.18);
  transition: transform 0.38s cubic-bezier(0.22, 1, 0.36, 1);
}

.toggle input:checked + .toggle__ui {
  background: linear-gradient(90deg, var(--accent), #22d3ee);
}

.toggle input:checked + .toggle__ui::after {
  transform: translateX(16px);
}

.toggle input:focus-visible + .toggle__ui {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 35%, transparent);
}

.range {
  width: 100%;
  accent-color: var(--accent);
}

.preview-area {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.preview-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
}

.toolbar-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.device-chips {
  display: flex;
  gap: 8px;
}

.chip {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease,
    transform 0.2s ease;
}

.chip:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

.chip.is-active {
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 22px rgba(99, 102, 241, 0.35);
}

.preview-frame-wrap {
  flex: 1;
  min-height: 420px;
  padding: 12px;
  display: flex;
}

.preview-frame {
  flex: 1;
  width: 100%;
  min-height: 400px;
  border: none;
  border-radius: var(--radius-md);
  background: #fff;
  opacity: 1;
  transition: opacity 0.35s ease, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.preview-frame.is-updating {
  opacity: 0.55;
}

.suggestions {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.suggestion-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface-2) 92%, var(--accent) 4%);
  border: 1px solid var(--border);
  font-size: 0.86rem;
  line-height: 1.45;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.suggestion-item:hover {
  border-color: color-mix(in srgb, var(--accent) 28%, var(--border));
}

.suggestion-item[data-type="ok"] {
  border-color: color-mix(in srgb, #22c55e 35%, var(--border));
}

.code-dock {
  padding: 0;
  overflow: hidden;
}

.code-dock__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
}

.code-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.code-tab {
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.code-tab:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--surface-2) 80%, transparent);
}

.code-tab.is-active {
  color: var(--text);
  border-color: var(--border);
  background: var(--surface);
}

.code-dock__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.code-output {
  margin: 0;
  max-height: 320px;
  overflow: auto;
  padding: 16px 18px 22px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  background: color-mix(in srgb, var(--page-bg) 40%, var(--surface-2));
  color: var(--text);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  transition: background 0.35s ease;
}

.fab-column {
  position: fixed;
  right: 18px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 40;
}

.fab {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(14px);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.fab:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.18);
}

.fab:active {
  transform: scale(0.96);
}

.btn.is-pulse {
  animation: pulse 0.55s ease;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.04);
  }
  100% {
    transform: scale(1);
  }
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 1024px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .controls {
    position: relative;
    top: auto;
    max-height: none;
    order: 2;
  }

  .preview-area {
    order: 1;
  }

  .controls__scroll {
    max-height: none;
  }

  .preview-frame-wrap {
    min-height: 360px;
  }
}

@media (max-width: 640px) {
  .app {
    padding: 14px 12px 120px;
  }

  .top-bar__title {
    font-size: 1.15rem;
  }

  .code-dock__head {
    flex-direction: column;
    align-items: stretch;
  }

  .code-dock__actions {
    justify-content: stretch;
  }

  .code-dock__actions .btn {
    flex: 1;
  }

  .preview-toolbar {
    position: sticky;
    top: 0;
    z-index: 5;
  }

  .fab-column {
    right: 12px;
    bottom: 16px;
  }
}