@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Orbitron:wght@500;600;700&family=Press+Start+2P&family=Rajdhani:wght@500;600;700&family=Roboto:wght@400;500;700&family=Space+Mono:wght@400;700&display=swap");

:root {
  --app-bg: #0b0c0f;
  --app-surface: #121419;
  --app-surface-2: #191c22;
  --app-surface-3: #20242c;
  --app-text: #f5f7fa;
  --app-muted: #9299a6;
  --app-line: #303641;
  --app-accent: #00ff41;
  --app-accent-strong: #00ff41;
  --app-danger: #ff5a70;
  --app-warning: #ffbd3e;
  --app-success: #55e68d;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --control-sm: 32px;
  --control-md: 40px;
  --control-lg: 48px;
  --radius: 10px;
  --radius-lg: 16px;
  --border: 1px solid var(--app-line);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  --transition: 160ms ease;
  --header-height: 72px;
  --footer-height: 46px;
  --mobile-drawer-handle: 40px;
  --admin-width: 50%;
  --content-width: 1600px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--app-bg);
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--app-text);
  background:
    radial-gradient(circle at 10% 0%, rgba(0, 255, 65, 0.07), transparent 26rem),
    var(--app-bg);
  font-family: Inter, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
summary,
select,
input[type="color"],
input[type="range"] {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 2px solid var(--app-accent);
  outline-offset: 2px;
}

button {
  border: 0;
}

a {
  color: inherit;
}

.app-shell {
  min-height: 100vh;
  padding-bottom: var(--footer-height);
}

.sticky-top-shell {
  position: sticky;
  top: 0;
  z-index: 200;
}

.app-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-height);
  padding: var(--space-3) max(var(--space-4), calc((100vw - var(--content-width)) / 2));
  border-bottom: var(--border);
  background: rgba(11, 12, 15, 0.94);
  backdrop-filter: blur(18px);
}

.mobile-action-drawer,
.mobile-drawer-actions {
  display: contents;
}

.mobile-drawer-toggle {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  text-decoration: none;
}

.brand-mark {
  display: block;
  width: min(250px, 32vw);
  height: var(--control-lg);
  flex: 0 0 auto;
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
}

.brand-version {
  display: grid;
  gap: 2px;
  color: var(--app-muted);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.version-badge {
  color: var(--app-accent);
}

.main-actions,
.locale-switch {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.locale-switch {
  padding: var(--space-1);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--app-surface);
}

.locale-button {
  min-width: var(--control-sm);
  height: var(--control-sm);
  padding: 0 var(--space-2);
  border-radius: calc(var(--radius) - 3px);
  color: var(--app-muted);
  background: transparent;
  font-size: 0.75rem;
  font-weight: 800;
}

.locale-button.is-active {
  color: var(--app-bg);
  background: var(--app-accent);
}

.nav-button {
  min-height: var(--control-md);
  padding: 0 var(--space-4);
  border-radius: var(--radius);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.history-button svg {
  display: none;
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.nav-button-ghost {
  border: var(--border);
  color: var(--app-text);
  background: var(--app-surface);
}

.nav-button-ghost:hover {
  border-color: var(--app-muted);
  background: var(--app-surface-2);
}

.nav-button:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.nav-button:disabled:hover {
  border-color: var(--app-line);
  background: var(--app-surface);
}

.nav-button-primary {
  color: var(--app-bg);
  background: var(--app-accent);
}

.nav-button-primary:hover {
  background: #c8ff6d;
}

.mobile-view-switch {
  display: none;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, var(--admin-width)) minmax(0, 1fr);
  width: min(100%, var(--content-width));
  min-height: calc(100vh - var(--header-height) - 46px);
  margin: 0 auto;
}

.admin-panel,
.preview-panel {
  min-width: 0;
}

.admin-panel {
  padding: var(--space-5);
  border-right: var(--border);
  background: rgba(18, 20, 25, 0.78);
}

.preview-panel {
  position: relative;
  padding: var(--space-3) var(--space-5) var(--space-5);
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 24px 24px;
}

.panel-heading,
.preview-toolbar,
.dialog-heading,
.subsection-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.panel-heading,
.preview-toolbar {
  min-height: 58px;
  margin-bottom: var(--space-4);
}

.preview-toolbar {
  min-height: 0;
  margin-bottom: var(--space-3);
}

.preview-toolbar h2 {
  color: var(--app-accent);
}

.panel-kicker {
  margin: 0 0 var(--space-1);
  color: var(--app-accent);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.panel-heading h1,
.preview-toolbar h2,
.dialog-heading h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.15;
}

.preview-toolbar h2 {
  font-size: clamp(0.96rem, 1.6vw, 1.24rem);
}

.preview-skin-control {
  display: grid;
  grid-template-columns: auto minmax(150px, 220px);
  align-items: center;
  gap: var(--space-2);
  color: var(--app-accent);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.preview-skin-control[hidden] {
  display: none;
}

.preview-skin-control select {
  width: 100%;
  min-height: 34px;
  padding: 0 var(--space-3);
  border: var(--border);
  border-radius: var(--radius);
  color: var(--app-text);
  background: var(--app-surface);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.admin-sections {
  display: grid;
  gap: var(--space-3);
}

.admin-section {
  overflow: hidden;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--app-surface);
}

.admin-section summary {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--control-lg);
  padding: var(--space-2) var(--space-3);
  list-style: none;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.admin-section[open] summary {
  border-bottom: 1px solid var(--app-accent);
  color: var(--app-bg);
  background: var(--app-accent);
}

.admin-section[open] summary .section-index {
  color: var(--app-accent);
  background: var(--app-bg);
}

.admin-section[open] summary .section-count,
.admin-section[open] summary .summary-chevron {
  color: var(--app-bg);
}

.section-index {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: calc(var(--radius) - 3px);
  color: var(--app-bg);
  background: var(--app-accent);
  font-size: 0.65rem;
}

.section-count {
  color: var(--app-muted);
  font-size: 0.7rem;
}

.summary-chevron {
  color: var(--app-muted);
  transition: transform var(--transition);
}

.admin-section[open] .summary-chevron {
  transform: rotate(180deg);
}

.section-body {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4);
}

.section-export-button {
  width: 100%;
}

.segmented-control .size-option-copy {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
}

.size-control {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.size-control label {
  display: block;
  width: 100%;
}

.segmented-control .size-tooltip {
  position: relative;
  z-index: 2;
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  min-height: 18px;
  padding: 0;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 0.62rem;
  font-style: normal;
  font-weight: 800;
  line-height: 1;
  text-transform: none;
}

.segmented-control .size-tooltip-content {
  position: absolute;
  right: -8px;
  bottom: calc(100% + 10px);
  z-index: 20;
  display: block;
  width: min(260px, 72vw);
  min-height: 0;
  padding: var(--space-3);
  border: 1px solid var(--app-line);
  border-radius: var(--radius);
  color: var(--app-text);
  background: #08090b;
  box-shadow: var(--shadow);
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1.45;
  text-align: left;
  text-transform: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.size-control label:first-child .size-tooltip-content {
  right: auto;
  left: -80px;
}

.segmented-control .size-tooltip:hover .size-tooltip-content,
.segmented-control .size-tooltip:focus .size-tooltip-content,
.segmented-control .size-tooltip:focus-visible .size-tooltip-content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.starter-guide {
  margin: 0;
  padding: 0;
}

.starter-tutorial {
  min-width: 0;
  overflow: hidden;
  border: var(--border);
  border-radius: var(--radius);
  background: rgba(8, 10, 13, 0.72);
}

.starter-tutorial-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 52px;
  padding: var(--space-2) var(--space-3);
  border-bottom: var(--border);
}

.starter-tutorial-topbar > p {
  margin: 0;
  color: var(--app-accent);
  font: 800 0.62rem/1.2 "Space Mono", Consolas, monospace;
  letter-spacing: 0.15em;
}

.starter-tutorial-arrows {
  display: flex;
  gap: var(--space-2);
}

.starter-tutorial-arrows button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  min-height: 34px;
  padding: 0;
  border: var(--border);
  border-radius: 50%;
  color: var(--app-text);
  background: var(--app-surface-2);
  font-size: 1rem;
  transition: color var(--transition), background var(--transition), opacity var(--transition);
}

.starter-tutorial-arrows button:hover:not(:disabled) {
  border-color: var(--app-accent);
  color: var(--app-bg);
  background: var(--app-accent);
}

.starter-tutorial-arrows button:disabled {
  opacity: 0.28;
  cursor: default;
}

.starter-tutorial-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: calc(100% - var(--space-5));
  gap: var(--space-3);
  min-width: 0;
  padding: var(--space-3);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-behavior: smooth;
  scroll-padding-inline: var(--space-3);
  scroll-snap-type: inline mandatory;
  scrollbar-width: none;
  cursor: grab;
}

.starter-tutorial-track::-webkit-scrollbar {
  display: none;
}

.starter-tutorial-track.is-dragging {
  scroll-behavior: auto;
  scroll-snap-type: none;
  cursor: grabbing;
  user-select: none;
}

.starter-tutorial-card {
  position: relative;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-width: 0;
  min-height: 390px;
  padding: var(--space-5);
  overflow: hidden;
  border: var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(0, 255, 65, 0.055), transparent 44%),
    var(--app-surface);
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.starter-tutorial-card::after {
  position: absolute;
  right: -16px;
  bottom: -54px;
  color: rgba(0, 255, 65, 0.055);
  content: attr(data-number);
  font: 800 10rem/1 "Space Mono", monospace;
  pointer-events: none;
}

.starter-card-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: var(--space-5);
  border: 1px solid var(--app-accent);
  border-radius: 50%;
  color: var(--app-accent);
  background: rgba(0, 255, 65, 0.06);
}

.starter-card-icon svg {
  width: 26px;
  height: 26px;
}

.starter-card-step {
  margin: 0 0 var(--space-2);
  color: var(--app-accent);
  font: 800 0.62rem/1.2 "Space Mono", Consolas, monospace;
  letter-spacing: 0.13em;
}

.starter-tutorial-card h2 {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--app-text);
  font-size: clamp(1.55rem, 3.6vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.035em;
}

.starter-card-copy {
  position: relative;
  z-index: 1;
  margin: var(--space-3) 0 var(--space-5);
  color: var(--app-muted);
  font-size: 0.78rem;
  line-height: 1.6;
}

.starter-card-action,
.starter-card-note {
  position: relative;
  z-index: 1;
  align-self: end;
  justify-self: start;
}

.starter-card-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  min-height: var(--control);
  padding: 0 var(--space-3);
  border: 1px solid var(--app-accent);
  border-radius: var(--radius);
  color: var(--app-bg);
  background: var(--app-accent);
  font-size: 0.7rem;
  font-weight: 800;
  text-decoration: none;
}

.starter-card-note {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--app-text);
  font-size: 0.68rem;
  font-weight: 800;
}

.starter-card-note::before {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  border-radius: 50%;
  background: var(--app-accent);
  content: "";
  box-shadow: 0 0 12px rgba(0, 255, 65, 0.7);
}

.starter-tutorial-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  min-height: 52px;
  padding: var(--space-2) var(--space-3);
  border-top: var(--border);
}

.starter-tutorial-dot {
  width: 13px;
  height: 13px;
  min-height: 13px;
  padding: 0;
  border: 2px solid var(--app-muted);
  border-radius: 50%;
  background: transparent;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.starter-tutorial-dot.is-active {
  border-color: var(--app-accent);
  background: var(--app-accent);
  transform: scale(1.15);
}

.field,
.field-group {
  display: grid;
  min-width: 0;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  border: 0;
}

.field > span,
.field-group legend,
.subsection-heading strong {
  color: var(--app-text);
  font-size: 0.74rem;
  font-weight: 700;
}

.field input,
.field select,
.field textarea,
.font-trigger {
  width: 100%;
  min-height: var(--control-md);
  padding: var(--space-2) var(--space-3);
  border: var(--border);
  border-radius: var(--radius);
  color: var(--app-text);
  background: var(--app-bg);
  transition: border-color var(--transition), background var(--transition);
}

.field textarea {
  resize: vertical;
}

.field input:hover,
.field select:hover,
.field textarea:hover,
.font-trigger:hover {
  border-color: #4a5260;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #626a77;
}

.field-help {
  display: block;
  margin: 0;
  color: var(--app-muted);
  font-family: "Space Mono", monospace;
  font-size: 0.68rem;
  line-height: 1.5;
}

.field input[aria-invalid="true"] {
  border-color: #ff6b6b;
  box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.14);
}

.required-mark {
  color: #ff6b6b;
  font: inherit;
}

.conditional-panel {
  display: grid;
  min-width: 0;
  gap: var(--space-4);
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.preset-option {
  position: relative;
  display: block;
  min-width: 0;
  cursor: pointer;
}

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

.preset-preview {
  position: relative;
  display: block;
  min-width: 0;
  height: 92px;
  overflow: hidden;
  border: 2px solid var(--app-line);
  border-radius: var(--radius);
  background: #070808;
  isolation: isolate;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.preset-preview strong {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  color: inherit;
  font-size: 1.44rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
  transform: translate(-50%, -50%);
  white-space: nowrap;
}

.preset-preview-eightbit {
  color: #031307;
  border-color: #008c25;
  border-radius: 0;
  background: #00ff41;
  font-family: "Space Mono", monospace;
}

.preset-preview-eightbit::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 30, 8, 0.28) 0 1px,
    transparent 1px 4px
  );
  content: "";
  pointer-events: none;
}

.preset-preview-eightbit::after {
  position: absolute;
  right: 12px;
  bottom: 12px;
  left: 12px;
  height: 8px;
  background: repeating-linear-gradient(90deg, #04220b 0 4px, transparent 4px 8px);
  content: "";
  opacity: 0.8;
}

.preset-preview-oldschool {
  border: 0;
  border-radius: 0;
  color: #ffb21d;
  background: #050505;
  clip-path: polygon(8px 0, calc(100% - 8px) 0, 100% 8px, 100% calc(100% - 8px), calc(100% - 8px) 100%, 8px 100%, 0 calc(100% - 8px), 0 8px);
  font-family: "Rajdhani", sans-serif;
}

.preset-preview-oldschool::before {
  position: absolute;
  z-index: 0;
  inset: 3px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.38), transparent 25%),
    linear-gradient(180deg, #777b89, #383b49 55%, #252733);
  clip-path: polygon(6px 0, calc(100% - 6px) 0, 100% 6px, 100% calc(100% - 6px), calc(100% - 6px) 100%, 6px 100%, 0 calc(100% - 6px), 0 6px);
  content: "";
}

.preset-preview-oldschool::after {
  position: absolute;
  z-index: 1;
  right: 11px;
  bottom: 11px;
  left: 11px;
  height: 6px;
  border: 2px solid #111218;
  background: linear-gradient(90deg, #ffb21d 0 62%, #181a21 62%);
  content: "";
}

.preset-preview-oldschool strong {
  color: transparent;
  background: linear-gradient(180deg, #fff3ad 0%, #ffd04a 43%, #f09210 100%);
  background-clip: text;
  filter: drop-shadow(1px 1px 0 #000) drop-shadow(-1px -1px 0 #000);
  -webkit-background-clip: text;
}

.preset-preview-modern {
  border-color: #17c982;
  color: #f7f7f8;
  background: linear-gradient(135deg, #00ff41 0%, #00d98a 48%, #22cfc5 100%);
}

.preset-preview-modern::before,
.preset-preview-modern::after {
  position: absolute;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.17);
  content: "";
  filter: blur(2px);
}

.preset-preview-modern::before {
  top: -58px;
  right: -10px;
}

.preset-preview-modern::after {
  bottom: -72px;
  left: 25%;
  background: rgba(3, 44, 35, 0.2);
}

.preset-preview-modern strong {
  text-shadow: 0 1px 8px rgba(0, 60, 44, 0.45);
}

.preset-preview-vinyl {
  color: #f7f8fa;
  border-color: #454b56;
  background: linear-gradient(145deg, #282c34, #111318);
}

.preset-preview-vinyl i {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 190px;
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle, #7ddcff 0 17%, #198bb7 18% 22%, #050608 23% 25%, transparent 26%),
    repeating-radial-gradient(circle, #08090b 0 3px, #3d424b 4px, #0c0e11 5px 8px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.55), inset 0 0 0 1px #515762;
  transform: translate(-50%, -50%);
}

.preset-preview-vinyl i::after {
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  content: "";
}

.preset-preview-vinyl strong {
  width: 70px;
  color: #07151c;
  font-family: "Rajdhani", sans-serif;
  letter-spacing: 0;
  text-shadow: 0 1px rgba(255, 255, 255, 0.28);
}

.preset-option input:checked + .preset-preview {
  border-color: var(--app-accent);
  box-shadow: 0 0 0 2px rgba(0, 255, 65, 0.22), 0 10px 24px rgba(0, 0, 0, 0.26);
  transform: translateY(-1px);
}

.preset-option:hover input:not(:checked) + .preset-preview {
  border-color: #7b8492;
  transform: translateY(-1px);
}

.preset-option input:focus-visible + .preset-preview {
  outline: 2px solid var(--app-accent);
  outline-offset: 3px;
}

.segmented-control {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-1);
  padding: var(--space-1);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--app-bg);
}

.segmented-control label {
  position: relative;
  min-width: 0;
}

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

.segmented-control span {
  display: grid;
  place-items: center;
  min-height: var(--control-sm);
  padding: 0 var(--space-2);
  border-radius: calc(var(--radius) - 3px);
  color: var(--app-muted);
  font-size: 0.68rem;
  font-weight: 700;
  text-align: center;
}

.segmented-control input:checked + span {
  color: var(--app-bg);
  background: var(--app-accent);
}

.toggle-field {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--control-lg);
  cursor: pointer;
}

.toggle-field[hidden],
.field[hidden],
.field-group[hidden] {
  display: none !important;
}

.toggle-field > span {
  display: grid;
  gap: 2px;
}

.toggle-field strong {
  font-size: 0.74rem;
}

.toggle-field small {
  color: var(--app-muted);
  font-size: 0.68rem;
}

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

.toggle-field i {
  position: relative;
  width: 42px;
  height: 24px;
  border: var(--border);
  border-radius: 999px;
  background: var(--app-bg);
  transition: background var(--transition), border-color var(--transition);
}

.toggle-field i::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--app-muted);
  transition: transform var(--transition), background var(--transition);
}

.toggle-field input:checked + i {
  border-color: var(--app-accent-strong);
  background: var(--app-accent);
}

.toggle-field input:checked + i::after {
  background: var(--app-bg);
  transform: translateX(18px);
}

.conditional-panel[hidden],
.field[hidden] {
  display: none !important;
}

.font-picker {
  position: relative;
}

.font-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
}

.font-options {
  position: absolute;
  right: 0;
  left: 0;
  z-index: 30;
  max-height: 260px;
  margin-top: var(--space-1);
  padding: var(--space-1);
  overflow-y: auto;
  border: var(--border);
  border-radius: var(--radius);
  background: #090a0d;
  box-shadow: var(--shadow);
}

.font-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  min-height: var(--control-md);
  padding: var(--space-2) var(--space-3);
  border-radius: calc(var(--radius) - 3px);
  color: var(--app-text);
  background: transparent;
  text-align: left;
}

.font-option:hover,
.font-option.is-selected {
  color: var(--app-bg);
  background: var(--app-accent);
}

.text-button {
  padding: var(--space-1) 0;
  color: var(--app-accent);
  background: transparent;
  font-size: 0.68rem;
  font-weight: 700;
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.color-field {
  display: grid;
  grid-template-columns: var(--control-md) 1fr;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  padding: var(--space-2);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--app-bg);
}

.color-field input {
  width: var(--control-md);
  height: var(--control-md);
  padding: 3px;
  border: 0;
  border-radius: calc(var(--radius) - 3px);
  background: transparent;
}

.color-field span {
  display: grid;
  min-width: 0;
}

.color-field strong {
  overflow: hidden;
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.color-field small {
  color: var(--app-muted);
  font-family: "Space Mono", monospace;
  font-size: 0.6rem;
  text-transform: uppercase;
}

.track-editor-list {
  display: grid;
  gap: var(--space-3);
}

.track-editor {
  overflow: hidden;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--app-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.track-editor.is-preview-target {
  border-color: var(--app-accent);
  box-shadow: 0 0 0 2px rgba(0, 255, 65, 0.14);
}

.track-editor-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--control-md);
  padding: var(--space-2);
  background: var(--app-surface-2);
}

.track-editor.is-expanded .track-editor-header {
  border-bottom: var(--border);
}

.track-editor-toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--app-text);
  background: transparent;
  text-align: left;
}

.track-editor-toggle:focus-visible {
  outline: 2px solid var(--app-accent);
  outline-offset: 3px;
}

.track-editor-chevron {
  color: var(--app-accent);
  font-size: 1rem;
  line-height: 1;
  transition: transform var(--transition);
}

.track-editor.is-expanded .track-editor-chevron {
  transform: rotate(180deg);
}

.track-number {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: calc(var(--radius) - 3px);
  color: var(--app-bg);
  background: var(--app-accent);
  font-size: 0.62rem;
  font-weight: 800;
}

.track-editor-title {
  overflow: hidden;
  font-size: 0.72rem;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-actions {
  display: flex;
  gap: var(--space-1);
}

.track-drag-handle {
  cursor: grab;
  touch-action: none;
}

.track-drag-handle:active {
  cursor: grabbing;
}

.track-drag-handle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.track-editor-list.is-reordering {
  user-select: none;
}

.track-editor.is-dragging {
  z-index: 2;
  opacity: 0.58;
  border-color: var(--app-accent);
  box-shadow: 0 8px 28px rgba(0, 255, 65, 0.18);
}

.mini-button,
.icon-button {
  display: grid;
  place-items: center;
  width: var(--control-sm);
  height: var(--control-sm);
  border: var(--border);
  border-radius: calc(var(--radius) - 3px);
  color: var(--app-muted);
  background: var(--app-bg);
}

.mini-button:hover,
.icon-button:hover {
  color: var(--app-text);
  border-color: var(--app-muted);
}

.mini-button.is-danger:hover {
  color: var(--app-danger);
  border-color: var(--app-danger);
}

.track-editor-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  padding: var(--space-3);
}

.track-editor-body[hidden] {
  display: none;
}

.track-editor-body .field-wide {
  grid-column: 1 / -1;
}

.track-url-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-2);
}

.test-url-button {
  min-width: 78px;
  border: var(--border);
  border-radius: var(--radius);
  color: var(--app-accent);
  background: var(--app-surface);
  font-size: 0.68rem;
  font-weight: 800;
}

.test-url-button.is-testing {
  color: var(--app-warning);
}

.test-url-button.is-success {
  color: var(--app-success);
  border-color: rgba(85, 230, 141, 0.5);
}

.test-url-button.is-error {
  color: var(--app-danger);
  border-color: rgba(255, 90, 112, 0.5);
}

.wide-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--control-md);
  padding: 0 var(--space-4);
  border: 1px dashed #4a5260;
  border-radius: var(--radius);
  color: var(--app-accent);
  background: transparent;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.wide-button:hover {
  border-color: var(--app-accent);
  background: rgba(0, 255, 65, 0.04);
}

.range-field output {
  float: right;
  color: var(--app-accent);
  font-family: "Space Mono", monospace;
  font-size: 0.68rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--app-accent);
}

.viewport-switch {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-1);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--app-surface);
}

.viewport-button {
  display: grid;
  place-items: center;
  width: var(--control-sm);
  height: var(--control-sm);
  border-radius: calc(var(--radius) - 3px);
  color: var(--app-muted);
  background: transparent;
  font-size: 1.1rem;
}

.viewport-button.is-active {
  color: var(--app-bg);
  background: var(--app-accent);
}

.preview-content {
  width: 100%;
}

.preview-content.is-sticky {
  position: sticky;
  top: calc(var(--header-height) + var(--space-3));
}

.preview-stage {
  position: static;
  display: block;
  min-height: 0;
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.preview-stage iframe {
  display: block;
  width: 100%;
  height: auto;
  min-height: 0;
  border: 0;
  background: transparent;
  transition: width var(--transition);
}

.preview-stage[data-viewport="mobile"] iframe {
  width: min(100%, 390px);
}

.app-footer {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: var(--footer-height);
  padding: var(--space-2) var(--space-4);
  border-top: var(--border);
  color: var(--app-muted);
  background: rgba(11, 12, 15, 0.96);
  backdrop-filter: blur(18px);
  font-size: 0.72rem;
}

.app-footer a {
  color: var(--app-accent);
  font-weight: 700;
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}

.export-dialog,
.mini-dialog {
  width: min(calc(100% - var(--space-6)), 680px);
  padding: 0;
  border: var(--border);
  border-radius: var(--radius-lg);
  color: var(--app-text);
  background: var(--app-surface);
  box-shadow: var(--shadow);
}

.export-dialog::backdrop,
.mini-dialog::backdrop {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(6px);
}

.export-dialog form,
.mini-dialog form {
  position: relative;
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
}

.mini-dialog {
  width: min(calc(100% - var(--space-6)), 480px);
}

.mini-dialog.track-dialog {
  width: min(calc(100% - var(--space-6)), 680px);
}

.preview-track-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.preview-track-field-wide {
  grid-column: 1 / -1;
}

.mini-dialog-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.mini-dialog-actions .nav-button {
  width: 100%;
}

.field-error {
  color: var(--app-danger);
  font-size: 0.72rem;
}

.copy-confirmation {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: var(--space-5);
  background: rgba(5, 7, 9, 0.82);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.copy-confirmation[hidden] {
  display: none;
}

.copy-confirmation.is-visible {
  opacity: 1;
}

.copy-confirmation-card {
  display: grid;
  gap: var(--space-2);
  width: min(100%, 390px);
  padding: var(--space-5);
  border: 1px solid var(--app-accent);
  border-radius: var(--radius);
  color: var(--app-text);
  background: #080b0a;
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.58), 0 0 28px rgba(0, 255, 65, 0.1);
  text-align: center;
  transform: translateY(8px) scale(0.98);
  transition: transform 180ms ease;
}

.copy-confirmation.is-visible .copy-confirmation-card {
  transform: translateY(0) scale(1);
}

.copy-confirmation-card strong {
  color: var(--app-accent);
  font: 800 1rem/1.2 "Space Mono", monospace;
  letter-spacing: 0.08em;
}

.copy-confirmation-card span {
  color: var(--app-text);
  font-size: 0.78rem;
}

.dialog-copy {
  margin: 0;
  color: var(--app-muted);
}

.export-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.export-option {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: var(--space-3);
  min-height: 88px;
  padding: var(--space-3);
  border: var(--border);
  border-radius: var(--radius);
  color: var(--app-text);
  background: var(--app-bg);
  text-align: left;
}

.export-option:hover {
  border-color: var(--app-accent);
  background: rgba(0, 255, 65, 0.04);
}

.export-icon {
  display: grid;
  place-items: center;
  width: var(--control-lg);
  height: var(--control-lg);
  border-radius: var(--radius);
  color: var(--app-bg);
  background: var(--app-accent);
  font-size: 1.3rem;
  font-weight: 800;
}

.export-option > span:last-child {
  display: grid;
  gap: var(--space-1);
}

.export-option small {
  color: var(--app-muted);
  font-size: 0.68rem;
}

.export-code-field textarea {
  font-family: "Space Mono", monospace;
  font-size: 0.65rem;
  white-space: pre;
}

.toast {
  position: fixed;
  right: var(--space-5);
  bottom: calc(var(--footer-height) + var(--space-3));
  z-index: 200;
  max-width: min(calc(100% - var(--space-6)), 360px);
  padding: var(--space-3) var(--space-4);
  border: var(--border);
  border-radius: var(--radius);
  color: var(--app-text);
  background: var(--app-surface-3);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(var(--space-3));
  transition: opacity var(--transition), transform var(--transition);
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.toast.is-success {
  border-color: rgba(85, 230, 141, 0.55);
}

.toast.is-error {
  border-color: rgba(255, 90, 112, 0.55);
}

@media (max-width: 1100px) {
  :root {
    --admin-width: 46%;
  }

  .brand-version {
    display: none;
  }

  .nav-button {
    padding-inline: var(--space-3);
    font-size: 0.68rem;
  }

  .color-grid,
  .track-editor-body {
    grid-template-columns: 1fr;
  }

  .track-editor-body .field-wide {
    grid-column: auto;
  }
}

@media (max-width: 780px) {
  :root {
    --header-height: auto;
  }

  .sticky-top-shell {
    top: -1px;
    padding-top: 1px;
    background: var(--app-bg);
  }

  .app-header {
    position: relative;
    display: grid;
    width: 100%;
    padding: var(--space-3);
    justify-content: stretch;
    backdrop-filter: none;
  }

  .brand {
    justify-content: center;
  }

  .brand-version {
    display: block;
  }

  .main-actions {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-areas:
      "locale viewport undo redo";
    min-width: 0;
    width: 100%;
  }

  .main-actions .locale-switch {
    grid-area: locale;
  }

  .main-actions .viewport-switch {
    grid-area: viewport;
  }

  #undoButton {
    grid-area: undo;
  }

  #redoButton {
    grid-area: redo;
  }

  .main-actions .locale-switch,
  .main-actions .viewport-switch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    min-width: 0;
  }

  .main-actions .locale-button,
  .main-actions .viewport-button {
    width: 100%;
    min-width: 0;
  }

  .nav-button {
    min-width: 0;
    padding-inline: var(--space-2);
    white-space: nowrap;
  }

  .history-button {
    display: grid;
    place-items: center;
  }

  .history-button svg {
    display: block;
  }

  .history-button .nav-label {
    display: none;
  }

  .mobile-view-switch {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
    gap: var(--space-1);
    padding: var(--space-2);
    border-bottom: var(--border);
    background: rgba(11, 12, 15, 0.96);
  }

  .app-shell {
    padding-bottom: calc(var(--footer-height) + var(--mobile-drawer-handle));
  }

  .mobile-action-drawer {
    position: fixed;
    right: 0;
    bottom: var(--footer-height);
    left: 0;
    z-index: 1200;
    display: grid;
    border-top: var(--border);
    background: rgba(11, 12, 15, 0.98);
    box-shadow: 0 -16px 40px rgba(0, 0, 0, 0.36);
    backdrop-filter: blur(18px);
  }

  .mobile-drawer-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
    max-height: 0;
    padding: 0 var(--space-3);
    overflow: hidden;
    opacity: 0;
    transform: translateY(var(--space-2));
    transition: max-height var(--transition), padding var(--transition), opacity var(--transition), transform var(--transition);
  }

  .mobile-action-drawer.is-open .mobile-drawer-actions {
    max-height: 88px;
    padding-block: var(--space-3);
    opacity: 1;
    transform: translateY(0);
  }

  .mobile-drawer-actions .nav-button {
    width: 100%;
    min-width: 0;
  }

  .mobile-drawer-toggle {
    display: grid;
    place-items: center;
    width: 100%;
    height: var(--mobile-drawer-handle);
    padding: 0;
    color: var(--app-accent);
    background: transparent;
  }

  .mobile-drawer-toggle svg {
    width: min(42vw, 160px);
    height: 24px;
    overflow: visible;
    fill: none;
    stroke: currentColor;
    stroke-width: 4;
    stroke-linecap: square;
    stroke-linejoin: miter;
    transition: transform var(--transition);
  }

  .mobile-action-drawer.is-open .mobile-drawer-toggle svg {
    transform: rotate(180deg);
  }

  .toast {
    bottom: calc(var(--footer-height) + var(--mobile-drawer-handle) + var(--space-2));
  }

  .mobile-view-button {
    min-width: 0;
    min-height: var(--control-md);
    overflow: hidden;
    border-radius: var(--radius);
    color: var(--app-muted);
    background: var(--app-surface);
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
  }

  .mobile-view-button.is-active {
    color: var(--app-bg);
    background: var(--app-accent);
  }

  .workspace {
    display: block;
    min-height: auto;
  }

  .admin-panel,
  .preview-panel {
    display: none;
    min-height: calc(100vh - 170px);
    padding: var(--space-3);
    border: 0;
  }

  .preset-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .starter-tutorial-track {
    grid-auto-columns: calc(100% - var(--space-3));
  }

  .starter-tutorial-card {
    min-height: 480px;
  }

  .admin-panel.is-mobile-active,
  .preview-panel.is-mobile-active {
    display: block;
  }

  .preview-content,
  .preview-content.is-sticky {
    position: static;
  }

  .preview-skin-control {
    grid-template-columns: auto minmax(110px, 1fr);
    max-width: 58%;
  }

  .preview-stage {
    position: static;
    min-height: 0;
    padding: 0;
  }

  .preview-stage iframe {
    min-height: 0;
  }

  .export-options {
    grid-template-columns: 1fr;
  }

  .preview-track-fields {
    grid-template-columns: 1fr;
  }

  .preview-track-field-wide {
    grid-column: auto;
  }

  .export-dialog form,
  .mini-dialog form {
    padding: var(--space-4);
  }
}

@media (max-width: 520px) {
  .brand-mark {
    width: min(190px, 48vw);
    height: var(--control-md);
  }

  .main-actions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .viewport-switch {
    justify-content: center;
  }

  .nav-button {
    white-space: normal;
  }

  .section-body {
    padding: var(--space-3);
  }

  .starter-tutorial-card {
    padding: var(--space-4);
  }

  .starter-tutorial-card h2 {
    font-size: clamp(1.55rem, 8vw, 2.15rem);
  }

  .track-url-row {
    grid-template-columns: 1fr;
  }

  .test-url-button {
    min-height: var(--control-md);
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}