:root {
  color-scheme: dark;
  font-family: "Inter", "Segoe UI", sans-serif;
  font-size: 16px;
  --color-bg: #0d1017;
  --color-panel: #161b26;
  --color-panel-strong: rgba(255, 255, 255, 0.05);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-accent: #6c5ce7;
  --color-accent-soft: rgba(108, 92, 231, 0.24);
  --color-text: rgba(245, 247, 255, 0.94);
  --color-muted: rgba(245, 247, 255, 0.56);
  --transition-snappy: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-soft: 0 30px 60px -40px rgba(0, 0, 0, 0.65);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

body {
  background: radial-gradient(circle at 15% 30%, rgba(108, 92, 231, 0.1), transparent),
    radial-gradient(circle at 85% 20%, rgba(255, 118, 117, 0.08), transparent),
    var(--color-bg);
  margin: 0;
  min-height: 100vh;
  color: var(--color-text);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  backdrop-filter: blur(40px) saturate(120%);
  pointer-events: none;
  opacity: 0.15;
}

.site-header {
  margin: 4px 0 0;
  padding: 0 clamp(24px, 5vw, 72px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: clamp(16px, 3vw, 32px);
  flex-wrap: wrap;
}

.site-logo {
  width: min(220px, 28vw);
  height: min(220px, 28vw);
  object-fit: contain;
}

.demo-picker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.18), rgba(108, 92, 231, 0.08));
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(20px) saturate(130%);
  margin-left: auto;
}

.demo-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(245, 247, 255, 0.65);
  font-weight: 600;
}

.demo-select {
  appearance: none;
  padding: 10px 36px 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(6, 8, 15, 0.7) url("data:image/svg+xml,%3Csvg viewBox='0 0 12 7' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 7L0 0h12z' fill='%23ffffff'/%3E%3C/svg%3E") no-repeat right 12px center;
  background-size: 12px 7px;
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition:
    border-color 160ms var(--transition-snappy),
    box-shadow 160ms var(--transition-snappy),
    background-color 160ms var(--transition-snappy);
}

.demo-select:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.demo-select option {
  background: #06080f;
  color: var(--color-text);
}

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

.site-title-name {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.site-title-tagline {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.site-footer {
  margin: 32px clamp(24px, 5vw, 72px) 40px;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  color: rgba(245, 247, 255, 0.35);
}

.site-footer-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 200ms var(--transition-snappy);
}

.site-footer-link:hover,
.site-footer-link:focus-visible {
  color: #a29bfe;
}

.site-footer-credits {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.app-root {
  display: grid;
  grid-template-columns: minmax(320px, 480px) minmax(360px, 1fr);
  gap: 24px;
  padding: 40px clamp(24px, 5vw, 72px);
  transition: grid-template-columns 280ms var(--transition-snappy);
}

.app-root.layout-stack {
  grid-template-columns: 1fr;
}

.panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(108, 92, 231, 0.08), transparent 60%);
  opacity: 0;
  transition: opacity 320ms var(--transition-snappy);
  pointer-events: none;
}

.panel:hover::after {
  opacity: 1;
}

.panel h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.editor-shell {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.04);
  background: #06080f;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

.editor-shell textarea {
  width: 100%;
  height: 360px;
  border: none;
  background: transparent;
  color: transparent;
  caret-color: var(--color-accent);
  resize: vertical;
  line-height: 1.5;
  font-family: "JetBrains Mono", "Fira Code", "SFMono-Regular", monospace;
  font-size: 14px;
  padding: 18px 20px;
  tab-size: 2;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-highlights {
  position: absolute;
  inset: 0;
  pointer-events: none;
  color: var(--color-text);
  margin: 0;
  padding: 18px 20px;
  font-family: "JetBrains Mono", "Fira Code", "SFMono-Regular", monospace;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: hidden;
}

.code-highlights code {
  display: block;
  width: 100%;
}

.code-token.keyword {
  color: #77baff;
}

.code-token.type {
  color: #ffa7c4;
}

.code-token.number {
  color: #ffe066;
}

.code-token.function {
  color: #81ecec;
}

.code-token.string {
  color: #ffb86c;
}

.code-token.comment {
  color: rgba(255, 255, 255, 0.35);
}

.code-token.operator {
  color: #ffd479;
}

.editor-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.editor-footer span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.status-chip {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.35);
  transition: background 200ms var(--transition-snappy), border-color 200ms var(--transition-snappy);
}

.status-chip.ok {
  border-color: rgba(129, 236, 236, 0.5);
  background: rgba(129, 236, 236, 0.12);
}

.status-chip.error {
  border-color: rgba(255, 118, 117, 0.5);
  background: rgba(255, 118, 117, 0.12);
}

.status-log {
  min-height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 12px 14px;
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--color-muted);
  white-space: pre-wrap;
  transition: border-color 220ms var(--transition-snappy);
}

.status-log.error {
  border-color: rgba(255, 118, 117, 0.45);
  color: rgba(255, 149, 149, 0.9);
}

.editor-guide {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.editor-guide a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 200ms var(--transition-snappy);
}

.editor-guide a:hover {
  color: #a29bfe;
}

.preview-panel canvas {
  width: 100%;
  max-width: 512px;
  align-self: center;
  margin: 0 auto;
  border-radius: var(--radius-md);
  background: repeating-conic-gradient(
      rgba(255, 255, 255, 0.04) 0deg 30deg,
      rgba(6, 8, 15, 0.7) 30deg 60deg
    )
    var(--color-panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  aspect-ratio: 1;
  transition: border-color 200ms var(--transition-snappy), transform 320ms var(--transition-snappy);
}

.preview-panel canvas:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.form-control {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.form-control label {
  color: var(--color-muted);
}

.toggle-control {
  justify-content: space-between;
}

.form-control input,
.form-control select {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--color-text);
  font: inherit;
  transition: border-color 200ms var(--transition-snappy), transform 200ms var(--transition-snappy);
}

.form-control input:focus-visible,
.form-control select:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.toggle {
  margin-top: 6px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: border-color 200ms var(--transition-snappy), background 200ms var(--transition-snappy);
}

.toggle:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.toggle span {
  font-size: 0.9rem;
  color: var(--color-text);
}

.toggle input {
  appearance: none;
  width: 44px;
  height: 24px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  position: relative;
  transition: background 200ms var(--transition-snappy), border-color 200ms var(--transition-snappy);
}

.toggle input::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 4px 10px -6px rgba(0, 0, 0, 0.6);
  transition: transform 200ms var(--transition-snappy), background 200ms var(--transition-snappy);
}

.toggle input:checked {
  background: var(--color-accent-soft);
  border-color: rgba(108, 92, 231, 0.5);
}

.toggle input:checked::after {
  transform: translateX(20px);
  background: var(--color-accent);
}

.toggle input:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(108, 92, 231, 0.25);
}

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

.button-primary,
.button-ghost {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  transition: transform 200ms var(--transition-snappy), box-shadow 200ms var(--transition-snappy), border-color 200ms var(--transition-snappy);
}

.button-primary {
  background: linear-gradient(135deg, #6d90d3, #597fbe);
  color: #fff;
  border-color: rgba(89, 127, 190, 0.4);
  box-shadow: 0 12px 30px -20px rgba(89, 127, 190, 0.65);
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 38px -18px rgba(89, 127, 190, 0.85);
}

.button-primary:active {
  transform: translateY(0);
}

.button-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.08);
}

.button-ghost:hover {
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}

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

.preview-toolbar span {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.export-status {
  font-size: 0.85rem;
  color: var(--color-muted);
  min-height: 20px;
}

.export-panel .export-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.export-panel .help-text {
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.4;
}

.export-panel .help-text[data-disabled="true"] {
  opacity: 0.6;
}

.fade-in {
  animation: fadeIn 420ms var(--transition-snappy);
}

.glow {
  position: absolute;
  inset: -20% 0 auto;
  height: 200px;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.4), transparent 55%);
  opacity: 0.08;
  pointer-events: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .site-header {
    margin: 18px clamp(14px, 6vw, 24px) -8px;
  }

  .site-logo {
    width: min(160px, 45vw);
    height: min(160px, 45vw);
  }

  .app-root {
    grid-template-columns: 1fr;
    padding: 24px clamp(16px, 6vw, 32px);
  }

  .editor-shell textarea {
    height: 300px;
  }
}