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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at top left, rgba(255, 184, 120, 0.22), transparent 36%),
    radial-gradient(circle at bottom right, rgba(63, 152, 219, 0.2), transparent 28%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0)),
    var(--chrome-bg);
  color: var(--chrome-text);
  font-family: var(--font-body);
}

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

button {
  cursor: pointer;
}

.app-shell {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--chrome-accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.app-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 0.95;
  text-transform: lowercase;
}

.header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.ghost-button,
.primary-button,
.pill-button,
.icon-button {
  border: 1px solid var(--chrome-panel-border);
  border-radius: 999px;
  padding: 10px 14px;
  background: var(--chrome-panel);
  color: var(--chrome-text);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.primary-button {
  background: var(--chrome-accent);
  border-color: transparent;
  color: #fff7f2;
}

.pill-button,
.icon-button {
  padding: 8px 12px;
}

.ghost-button:hover,
.primary-button:hover,
.pill-button:hover,
.icon-button:hover {
  transform: translateY(-1px);
}

.mobile-tabs input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tab-labels {
  display: none;
}

.app-grid {
  display: grid;
  grid-template-columns: minmax(340px, 0.95fr) minmax(420px, 1.25fr);
  gap: 18px;
  min-height: calc(100vh - 140px);
}

.panel {
  min-width: 0;
  border: 1px solid var(--chrome-panel-border);
  border-radius: 28px;
  background: var(--chrome-panel);
  box-shadow: var(--chrome-shadow);
  backdrop-filter: blur(20px);
  overflow: hidden;
}

.stack-panel {
  min-width: 0;
  display: grid;
  gap: 18px;
  align-content: start;
}

.controls-panel,
.output-panel {
  display: flex;
  flex-direction: column;
}

.panel-inner {
  padding: 20px;
}

.controls-stack {
  display: grid;
  gap: 14px;
  padding: 20px;
  max-height: calc(100vh - 190px);
  overflow: auto;
}

.controls-stack details {
  border: 1px solid var(--chrome-panel-border);
  border-radius: 20px;
  background: var(--chrome-panel-strong);
  overflow: hidden;
}

.controls-stack summary {
  list-style: none;
  padding: 16px 18px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.controls-stack summary::after {
  content: "+";
  color: var(--chrome-muted);
  font-size: 1rem;
  line-height: 1;
}

.controls-stack details[open] summary::after {
  content: "-";
}

.section-body {
  padding: 0 18px 18px;
}

.field-grid {
  display: grid;
  gap: 12px;
}

.segment-side-group {
  display: grid;
  gap: 10px;
}

.segment-side-group + .segment-side-group {
  margin-top: 18px;
}

.field-row,
.toggle-row,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.field-label {
  display: grid;
  gap: 6px;
  font-size: 0.92rem;
}

.profile-toolbar {
  display: grid;
  gap: 12px;
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.profile-actions .pill-button[disabled],
.profile-actions .icon-button[disabled],
.ghost-button[disabled],
.primary-button[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.field-label span {
  color: var(--chrome-muted);
  font-size: 0.82rem;
}

.select-input,
.text-input {
  width: 100%;
  border: 1px solid var(--chrome-panel-border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.55);
  color: var(--chrome-text);
  padding: 12px 14px;
}

body[data-chrome="dark"] .select-input,
body[data-chrome="dark"] .text-input {
  background: rgba(255, 255, 255, 0.04);
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 10px;
}

.theme-card {
  border: 1px solid var(--chrome-panel-border);
  border-radius: 18px;
  padding: 10px;
  background: transparent;
  text-align: left;
}

.theme-card.is-active,
.choice-chip.is-active {
  border-color: var(--chrome-accent);
  box-shadow: inset 0 0 0 1px var(--chrome-accent);
}

.swatches {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin-bottom: 8px;
}

.swatches span {
  height: 12px;
  border-radius: 999px;
}

.theme-card strong,
.choice-chip strong {
  display: block;
  font-size: 0.88rem;
}

.theme-card small,
.choice-chip small,
.hint {
  color: var(--chrome-muted);
  font-size: 0.78rem;
}

.choice-row,
.option-list,
.segment-list {
  display: grid;
  gap: 10px;
}

.choice-chip {
  border: 1px solid var(--chrome-panel-border);
  border-radius: 18px;
  padding: 12px;
  background: transparent;
  text-align: left;
}

.toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--chrome-panel-border);
  border-radius: 999px;
  background: transparent;
}

.toggle-pill input {
  margin: 0;
}

.segment-card {
  border: 1px solid var(--chrome-panel-border);
  border-radius: 18px;
  padding: 12px;
  display: grid;
  gap: 8px;
  background: transparent;
}

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

.segment-card-actions {
  display: flex;
  gap: 6px;
}

.output-panel .panel-inner {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
  height: 100%;
  min-height: calc(100vh - 190px);
}

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

.output-meta {
  color: var(--chrome-muted);
  font-size: 0.82rem;
}

.code-frame {
  min-height: 0;
  border-radius: 22px;
  background: var(--chrome-code-bg);
  overflow: auto;
}

.code-frame pre {
  margin: 0;
  padding: 20px;
  color: #f4f1ed;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.code-editor {
  width: 100%;
  min-height: 100%;
  border: 0;
  outline: 0;
  resize: vertical;
  margin: 0;
  padding: 20px;
  background: transparent;
  color: #f4f1ed;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.token-comment {
  color: #7f8a99;
}

.token-command {
  color: #ffb86c;
}

.token-value {
  color: #7ee7d8;
}

.token-directive {
  color: #f38ba8;
}

.empty-state {
  padding: 18px;
  color: var(--chrome-muted);
}

@media (max-width: 1100px) {
  .app-grid {
    grid-template-columns: 1fr;
  }

  .controls-stack {
    max-height: none;
  }
}

@media (max-width: 900px) {
  .app-shell {
    padding: 14px;
  }

  .app-header {
    flex-direction: column;
    align-items: stretch;
  }

  .tab-labels {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 12px;
  }

  .tab-labels label {
    text-align: center;
    padding: 12px 10px;
    border: 1px solid var(--chrome-panel-border);
    border-radius: 999px;
    background: var(--chrome-panel);
  }

  .app-grid > [data-panel] {
    display: none;
  }

  .stack-panel .preview-panel--stacked {
    display: none;
  }

  .stack-panel .controls-panel {
    display: block;
  }

  #tab-controls:checked ~ .tab-labels label[for="tab-controls"],
  #tab-preview:checked ~ .tab-labels label[for="tab-preview"],
  #tab-output:checked ~ .tab-labels label[for="tab-output"] {
    background: var(--chrome-accent);
    color: #fff7f2;
    border-color: transparent;
  }

  #tab-controls:checked ~ .app-grid > [data-panel="controls"],
  #tab-output:checked ~ .app-grid > [data-panel="output"] {
    display: block;
  }

  #tab-preview:checked ~ .app-grid > [data-panel="controls"] .controls-panel {
    display: none;
  }

  #tab-preview:checked ~ .app-grid > [data-panel="controls"] .preview-panel--stacked {
    display: block;
  }

  #tab-controls:checked ~ .app-grid > [data-panel="controls"] .preview-panel--stacked {
    display: none;
  }
}