:root {
  color-scheme: dark;
  --bg: #0f172a;
  --bg-pane: #111c36;
  --border: #1e293b;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.2);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --stage-bg: rgba(171, 184, 195, 1);
  --code-bg: #1f1f22;
  --code-border: rgba(255, 255, 255, 0.12);
  --code-text: #f2f4f8;
  --code-comment: #61697a;
  --code-keyword: #f46fd6;
  --code-string: #4ff4ec;
  --code-property: #5ff0cf;
  --code-meta: #8f72ff;
  --code-number: #f6b979;
  --code-variable: #fca5ff;
  --code-function: #a5b4ff;
  --code-operator: #82aaff;
  --code-attribute: #ffb86c;
  --code-constant: #ff9aa2;
  --code-builtin: #cbd5ff;
  --code-boolean: #fb923c;
  --code-color: #f4f8a4;
  --code-line-number: #94a3b8;
  --accent-cursor: #f46fd6;
  --font-code: "Hack", "Fira Code", "Source Code Pro", Consolas, monospace;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.45);
  --stage-shadow: 0 20px 68px rgba(15, 23, 42, 0.55);
  --stage-width: 680px;
  --code-min-height: 260px;
  --line-number-gutter: 48px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: radial-gradient(circle at 15% 20%, rgba(56, 189, 248, 0.1), transparent 40%),
    radial-gradient(circle at 85% 10%, rgba(165, 180, 252, 0.1), transparent 35%),
    var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 48px 20px;
}

.app-shell {
  max-width: 1100px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.app-header {
  text-align: center;
  padding: 16px 0 12px;
}

.app-header h1 {
  margin: 0 0 8px;
  font-size: 2.75rem;
  letter-spacing: -1px;
}

.app-header p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.app-guide {
  margin: -8px auto 10px;
  padding: 18px 22px;
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 18px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  max-width: 780px;
}

.app-guide h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.app-guide ul {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 8px;
}

.app-guide li {
  color: var(--muted);
  font-size: 0.9rem;
}

.app-guide code {
  font-family: var(--font-code);
  font-size: 0.85rem;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.22);
}

.app-nav {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: -8px;
  margin-bottom: 8px;
}

.app-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.app-nav__link:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  box-shadow: 0 12px 20px rgba(56, 189, 248, 0.22);
}

.app-nav__link:active {
  transform: translateY(0);
  box-shadow: none;
}

.panes {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pane {
  background: var(--bg-pane);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow);
}

label {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.duration-label,
.fps-label {
  margin-right: 4px;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.stage-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  padding: 14px 16px;
  background: var(--bg-pane);
  border: 1px solid var(--border);
  border-radius: 16px;
}

#gif-duration-value {
  min-width: 64px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.stage-control {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
}

.stage-control label {
  margin: 0;
  font-size: 0.7rem;
}

.stage-control span {
  font-size: 0.78rem;
  color: var(--muted);
  min-width: 72px;
}

.stage-control input[type="range"] {
  flex: 1 1 180px;
  min-width: 140px;
}

.stage-control input[type="number"] {
  width: 90px;
}

textarea {
  min-height: 260px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.65);
  color: var(--text);
  font-family: var(--font-code);
  font-size: 0.95rem;
  line-height: 1.55;
  padding: 16px;
  resize: vertical;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

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

.combo-label {
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.combo-input {
  position: relative;
}

.combo-input input[list] {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.85rem;
  padding: 8px 16px;
  font-family: inherit;
  min-width: 140px;
}

.combo-input input[list]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
}

.toggle-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

#export-status {
  flex-basis: 100%;
  min-height: 20px;
  font-size: 0.8rem;
  color: var(--muted);
}

#status-text {
  flex-basis: 100%;
  min-height: 20px;
  font-size: 0.8rem;
  color: var(--muted);
}

#speed-value {
  min-width: 56px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.speed-label {
  margin-right: 4px;
  text-transform: uppercase;
  font-size: 0.7rem;
}

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

input[type="number"] {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.85rem;
  padding: 6px 10px;
  font-family: inherit;
  width: 90px;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  margin: 0;
}

.controls input[type="number"] {
  width: 90px;
}

button {
  appearance: none;
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 20px rgba(56, 189, 248, 0.35);
}

button:active {
  transform: translateY(0);
  box-shadow: none;
}

button#clear {
  background: rgba(148, 163, 184, 0.15);
  color: var(--muted);
}

button#reset-html {
  background: rgba(148, 163, 184, 0.15);
  color: var(--muted);
}

button#compile-gif {
  background: rgba(56, 189, 248, 0.18);
  color: var(--accent);
}

button#compile-gif:hover {
  box-shadow: 0 12px 20px rgba(56, 189, 248, 0.28);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
  transform: none;
}

.theme-label {
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.compiler-layout .controls {
  margin-top: 8px;
}

.preview-shell {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.55);
  overflow: hidden;
  min-height: 260px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.035);
}

#html-preview {
  width: 100%;
  height: 100%;
  border: none;
  background: #0f172a;
}

#theme-select {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.85rem;
  padding: 8px 16px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#theme-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.code-stage {
  padding: 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  width: var(--stage-width, 680px);
  max-width: none;
  margin: 0 auto;
  position: relative;
  overflow: visible;
  display: flex;
  justify-content: center;
}

.compile-section {
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.compile-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.compile-header h2 {
  margin: 0;
  font-size: 1.15rem;
}

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

.compile-list {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.compile-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 32px;
  text-align: center;
  background: rgba(15, 23, 42, 0.35);
  border: 1px dashed var(--border);
  border-radius: 16px;
  color: var(--muted);
  font-size: 0.9rem;
}

.compile-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  border-radius: 16px;
  background: rgba(11, 17, 32, 0.75);
  border: 1px solid rgba(148, 163, 184, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.compile-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 12px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.05);
}

.compile-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.compile-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
}

.compile-detail {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.compile-card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.compile-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.82rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.compile-download:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(56, 189, 248, 0.32);
}

button.compile-remove {
  background: rgba(148, 163, 184, 0.15);
  color: var(--muted);
  padding: 8px 14px;
  font-size: 0.82rem;
}

button.compile-remove:hover {
  box-shadow: 0 8px 16px rgba(148, 163, 184, 0.2);
}

.window-top,
.dot,
.dot-red,
.dot-amber,
.dot-green {
  display: none;
}

.code-frame {
  border-radius: 18px;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  overflow: hidden;
  width: 100%;
  position: relative;
}

.code-frame.line-numbers-enabled .code-display {
  padding-left: calc(34px + var(--line-number-gutter));
}

.code-display {
  margin: 0;
  padding: 34px;
  font-family: var(--font-code);
  font-size: 14px;
  line-height: 1.33;
  color: var(--code-text);
  overflow: hidden;
  min-height: var(--code-min-height, 260px);
  max-height: none;
  background: transparent;
  position: relative;
}

.code-content,
#typed-target {
  white-space: pre-wrap;
  display: block;
  color: inherit;
}

.code-line {
  display: block;
  position: relative;
  white-space: pre-wrap;
  font-variant-ligatures: contextual;
  word-break: break-word;
}

.code-frame.line-numbers-enabled .code-line::before {
  content: attr(data-line);
  position: absolute;
  left: calc(-1 * var(--line-number-gutter));
  width: calc(var(--line-number-gutter) - 12px);
  text-align: right;
  color: var(--code-line-number);
  opacity: 0.8;
  padding-right: 10px;
  font-variant-numeric: tabular-nums;
}

.code-content {
  min-height: 100%;
}

.code-buffer {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  user-select: none;
  white-space: pre-wrap;
  font: inherit;
}

.typed-cursor {
  color: var(--accent-cursor);
  font-size: 1rem;
}

.typed-cursor.proxy {
  display: inline-block;
  margin-left: -2px;
  animation: blink 1s step-start infinite;
}

.code-stage .typed-cursor:not(.proxy) {
  display: none;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.code-stage .code-content::selection {
  background: rgba(255, 154, 193, 0.4);
}

.code-stage .code-display::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.code-stage .code-display::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
}

.code-stage .code-display::-webkit-scrollbar-track {
  background: transparent;
}

.hljs {
  color: var(--code-text);
  background: transparent !important;
}

.hljs-comment,
.hljs-quote {
  color: var(--code-comment);
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-type,
.hljs-symbol {
  color: var(--code-keyword);
}

.hljs-string,
.hljs-selector-attr,
.hljs-selector-pseudo {
  color: var(--code-string);
}

.hljs-number {
  color: var(--code-number);
}

.hljs-literal,
.hljs-literal.hljs-boolean,
.hljs-literal.boolean-literal {
  color: var(--code-boolean);
}

.hljs-literal.special-literal {
  color: var(--code-constant);
}

.hljs-hexcolor,
.hljs-color,
.hljs-literal.hljs-hexcolor,
.hljs-built_in.hljs-color {
  color: var(--code-color);
}

.hljs-property,
.hljs-tag,
.hljs-selector-id,
.hljs-selector-class,
.hljs-doctag,
.hljs-meta .hljs-string {
  color: var(--code-property);
}

.hljs-variable,
.hljs-template-variable,
.hljs-params {
  color: var(--code-variable);
}

.hljs-title,
.hljs-title.class_,
.hljs-title.function_,
.hljs-function {
  color: var(--code-function);
}

.hljs-meta,
.hljs-meta .hljs-keyword,
.hljs-meta .hljs-title {
  color: var(--code-meta);
}

.hljs-name,
.hljs-section {
  color: var(--code-text);
}

.hljs-variable,
.hljs-template-variable,
.hljs-params {
  color: var(--code-variable);
}

.hljs-built_in,
.hljs-variable.language_,
.hljs-variable.global_,
.hljs-variable.special_ {
  color: var(--code-builtin);
}

.hljs-variable.constant_,
.hljs-constant {
  color: var(--code-constant);
}

.hljs-attr,
.hljs-attribute,
.hljs-attribute .hljs-name {
  color: var(--code-attribute);
}

.hljs-operator,
.hljs-punctuation {
  color: var(--code-operator);
}

.hljs-emphasis {
  font-style: italic;
}

.hljs-strong {
  font-weight: 600;
}

.capture-stage {
  position: absolute;
  left: -9999px;
  top: -9999px;
  pointer-events: none;
  opacity: 0;
}

@media (max-width: 900px) {
  .panes {
    grid-template-columns: 1fr;
  }

  textarea,
  .code-display {
    min-height: 220px;
  }

  .code-stage {
    padding: 36px 28px;
  }
}