/* Design tokens */
:root {
  --bg-deep: #0d1117;
  --bg-surface: #161b22;
  --bg-overlay: #21262d;
  --border: #30363d;
  --border-subtle: #21262d;
  --text-primary: #c9d1d9;
  --text-bright: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --text-code: #e6edf3;
  --accent-blue: #58a6ff;
  --accent-green: #238636;
  --accent-green-hover: #2ea043;
  --accent-red: #f85149;
  --accent-purple: #bc8cff;
  --accent-orange: #d29922;
  --region-header: #58a6ff33;
  --region-main: #3fb95033;
  --region-right: #bc8cff33;
  --region-modal: #d2992255;
  --color-on-accent: #fff;
  --color-error: #f85149;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

/* Light theme */
[data-theme="light"] {
  --bg-deep: #ffffff;
  --bg-surface: #f6f8fa;
  --bg-overlay: #e1e4e8;
  --border: #d0d7de;
  --border-subtle: #e1e4e8;
  --text-primary: #1f2328;
  --text-bright: #0d1117;
  --text-secondary: #656d76;
  --text-muted: #8b949e;
  --text-code: #1f2328;
  --accent-blue: #0969da;
  --accent-green: #1a7f37;
  --accent-green-hover: #2da44e;
  --accent-red: #cf222e;
  --accent-purple: #8250df;
  --accent-orange: #bf8700;
  --region-header: #0969da33;
  --region-main: #1a7f3733;
  --region-right: #8250df33;
  --region-modal: #bf870055;
  --color-on-accent: #fff;
  --color-error: #cf222e;
}

/* Auto-detect system preference */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg-deep: #ffffff;
    --bg-surface: #f6f8fa;
    --bg-overlay: #e1e4e8;
    --border: #d0d7de;
    --border-subtle: #e1e4e8;
    --text-primary: #1f2328;
    --text-bright: #0d1117;
    --text-secondary: #656d76;
    --text-muted: #8b949e;
    --text-code: #1f2328;
    --accent-blue: #0969da;
    --accent-green: #1a7f37;
    --accent-green-hover: #2da44e;
    --accent-red: #cf222e;
    --accent-purple: #8250df;
    --accent-orange: #bf8700;
    --region-header: #0969da33;
    --region-main: #1a7f3733;
    --region-right: #8250df33;
    --region-modal: #bf870055;
    --color-on-accent: #fff;
    --color-error: #cf222e;
  }
}

/* Reset */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-mono); background: var(--bg-deep); color: var(--text-primary); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* Page chrome */
#header { background: var(--bg-surface); border-bottom: 1px solid var(--border); }
#header h1 { font-size: 16px; color: var(--accent-blue); font-weight: 600; }
#header a { color: var(--accent-blue); text-decoration: none; }
#header a:hover { text-decoration: underline; }
.slide-counter { font-size: 13px; color: var(--text-secondary); }
.nav { background: var(--bg-surface); border-top: 1px solid var(--border); }
.nav a, .nav span.disabled { background: var(--bg-overlay); color: var(--text-primary); border: 1px solid var(--border); border-radius: 6px; font-size: 13px; font-family: inherit; transition: background 0.15s; text-decoration: none; }
.nav a:hover { background: var(--border); }
.nav span.disabled { opacity: 0.3; cursor: default; }
.progress { background: var(--bg-overlay); }
.progress-bar { background: var(--accent-blue); transition: width 0.3s ease; }
.slide-progress { width: 100%; height: 3px; border: none; appearance: none; background: var(--bg-overlay); }
.slide-progress::-webkit-progress-bar { background: var(--bg-overlay); }
.slide-progress::-webkit-progress-value { background: var(--accent-blue); transition: width 0.3s; }
.slide-progress::-moz-progress-bar { background: var(--accent-blue); }
.kbd-hint { font-size: 11px; color: var(--text-muted); }
kbd { background: var(--bg-overlay); border: 1px solid var(--border); border-radius: 3px; padding: 1px 5px; font-size: 11px; }

/* Loading placeholder */
.loading-placeholder { color: var(--text-muted); border-style: dashed; font-size: 11px; }

/* TOC */
.toc-item { border-bottom: 1px solid var(--border-subtle); }
.toc-item:hover { background: var(--bg-surface); }
.toc-item a { color: var(--accent-blue); text-decoration: none; font-size: 15px; }
.toc-item a:hover { text-decoration: underline; }
.toc-pos { color: var(--text-muted); font-size: 13px; }
.toc-subtitle { color: var(--text-secondary); font-size: 13px; }

/* Theme toggle */
.theme-toggle { background: none; border: 1px solid var(--border); border-radius: 6px; color: var(--text-secondary); padding: 4px 8px; font-size: 13px; font-family: inherit; cursor: pointer; transition: color 0.15s; }
.theme-toggle:hover { color: var(--text-bright); }

/* Error state */
.error-state { color: var(--color-error); font-size: 13px; padding: 16px; border: 1px dashed var(--color-error); border-radius: 6px; text-align: center; }

/* CRUD forms — layout via .stack.stack--tight, .row in markup */
.form-group { display: flex; flex-direction: column; gap: 4px; margin-bottom: 16px; } /* layout-exception: form domain layout */
.form-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.form-input { background: var(--bg-deep); color: var(--text-primary); border: 1px solid var(--border); border-radius: 6px; padding: 8px 12px; font-family: inherit; font-size: 13px; }
.form-input:focus { outline: none; border-color: var(--accent-blue); }
.form-input--sm { width: 120px; }
.form-actions { display: flex; gap: 8px; margin-top: 8px; } /* layout-exception: form domain layout */
.form-btn { background: var(--accent-blue); color: var(--color-on-accent); border: none; border-radius: 6px; padding: 8px 16px; font-family: inherit; font-size: 13px; cursor: pointer; text-decoration: none; display: inline-block; }
.form-btn:hover { opacity: 0.9; }
.form-btn--muted { background: var(--bg-overlay); color: var(--text-primary); border: 1px solid var(--border); }
.form-btn--muted:hover { background: var(--border); }
.form-btn--danger { background: var(--accent-red); }
.toc-action { font-size: 11px; color: var(--text-muted); margin-left: 8px; }
.toc-action:hover { color: var(--accent-blue); }

/* Empty state */
.empty-state { color: var(--text-muted); font-size: 13px; padding: 24px; text-align: center; font-style: italic; }
[data-empty="false"] { display: none; }
[data-empty="true"].empty-state { display: block; }

/* State variants reference page — layout via .grid-state in markup */
.state-component-section { margin-bottom: 32px; }
.state-component-name { font-size: 14px; font-weight: 600; color: var(--text-bright); margin-bottom: 8px; }
.state-card { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.state-card-label { padding: 4px 12px; font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; background: var(--bg-surface); border-bottom: 1px solid var(--border-subtle); }
.state-card-preview { padding: 12px; min-height: 60px; }

/* SlotCardComponent — layout via .stack.stack--0 in markup */
.slot-card { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: var(--bg-surface); }
.slot-card__image { height: 120px; background: var(--bg-overlay); background-size: cover; background-position: center; }
.slot-card__image--placeholder { background: linear-gradient(135deg, var(--bg-overlay), var(--bg-deep)); }
.slot-card__body { padding: 16px; }
.slot-card__badge { display: inline-block; font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--accent-blue); background: color-mix(in srgb, var(--accent-blue) 10%, transparent); padding: 2px 8px; border-radius: 4px; margin-bottom: 8px; }
.slot-card__title { font-size: 14px; font-weight: 600; color: var(--text-bright); margin: 0 0 4px; }
.slot-card__subtitle { font-size: 12px; color: var(--text-secondary); margin: 0 0 8px; }
.slot-card__text { font-size: 12px; color: var(--text-secondary); margin: 0 0 12px; }
.slot-card__action { display: inline-block; font-size: 12px; font-weight: 600; color: var(--accent-blue); text-decoration: none; margin-top: auto; }
.slot-card__action:hover { text-decoration: underline; }

/* Variant: hero — full-width, centered */
.slot-card--hero { grid-column: 1 / -1; text-align: center; border: none; background: var(--bg-overlay); }
.slot-card--hero .slot-card__body { padding: 48px 24px; }
.slot-card--hero .slot-card__title { font-size: 24px; margin-bottom: 8px; }
.slot-card--hero .slot-card__subtitle { font-size: 14px; max-width: 480px; }
.slot-card--hero .slot-card__action { background: var(--accent-blue); color: var(--bg-deep); padding: 8px 24px; border-radius: 6px; margin-top: 16px; }
.slot-card--hero .slot-card__action:hover { text-decoration: none; opacity: 0.9; }

/* Variant: feature — standard card */
.slot-card--feature .slot-card__body { padding: 16px; }

/* Variant: compact — minimal */
.slot-card--compact .slot-card__title { margin: 0; font-size: 13px; }
.slot-card--compact .slot-card__action { margin: 0; }

/* data-state selectors for SlotCardComponent */
.slot-card[data-state="hero"] { grid-column: 1 / -1; text-align: center; border: none; background: var(--bg-overlay); }
.slot-card[data-state="feature"] { border-color: var(--border); }

/* Scenario editor — two-panel layout (exception: complex domain grid) */
.editor { display: grid; grid-template-columns: 280px 1fr; height: calc(100vh - 120px); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; } /* layout-exception: complex domain grid */
.editor.editor--sidebar-collapsed { grid-template-columns: 32px 1fr; } /* layout-exception: collapsed state */
.editor-sidebar { background: var(--bg-deep); display: flex; flex-direction: column; overflow: hidden; } /* layout-exception: editor domain layout */
.editor--sidebar-collapsed .editor-sidebar > *:not(.editor-sidebar-toggle) { display: none; }
.editor-sidebar-toggle { background: none; border: none; color: var(--text-muted); font-size: 14px; cursor: pointer; padding: 8px; text-align: center; flex-shrink: 0; }
.editor-sidebar-toggle:hover { color: var(--text-primary); background: var(--bg-overlay); }
.editor-preview { background: var(--bg-deep); display: flex; flex-direction: column; } /* layout-exception: editor domain layout */
.editor-preview-tabs { display: flex; border-bottom: 1px solid var(--border-subtle); flex-shrink: 0; background: var(--bg-surface); } /* layout-exception: editor domain layout */
.editor-preview-tab { background: none; border: none; color: var(--text-secondary); padding: 6px 16px; font-size: 12px; font-family: inherit; cursor: pointer; border-bottom: 2px solid transparent; }
.editor-preview-tab:hover { color: var(--text-primary); }
.editor-preview-tab--active { color: var(--accent-blue); border-bottom-color: var(--accent-blue); }
.editor-preview-panel { display: none; flex: 1; min-height: 0; overflow-y: auto; } /* layout-exception: editor domain layout */
.editor-preview-panel--active { display: flex; flex-direction: column; } /* layout-exception: editor domain layout */
.editor-context-content { padding: 12px; font-size: 12px; overflow-y: auto; }
.context-section { margin-bottom: 12px; }
.context-section-title { font-size: 10px; font-weight: 600; color: var(--accent-blue); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; padding-bottom: 4px; border-bottom: 1px solid var(--border-subtle); }
.context-row { display: flex; justify-content: space-between; padding: 2px 0; } /* layout-exception: editor domain layout */
.context-label { color: var(--text-muted); font-size: 11px; }
.context-value { color: var(--text-primary); font-size: 11px; font-weight: 500; }
.context-value--mono { font-family: var(--font-mono, monospace); font-size: 10px; word-break: break-all; }
.context-pipeline { font-family: var(--font-mono, monospace); font-size: 10px; color: var(--text-secondary); background: var(--bg-surface); padding: 8px; border-radius: 4px; white-space: pre-wrap; word-break: break-all; }
.editor-log-content { padding: 12px; overflow-y: auto; flex: 1; } /* layout-exception: editor domain layout */
.editor-log-pre { font-family: var(--font-mono, monospace); font-size: 10px; color: var(--text-secondary); background: var(--bg-surface); padding: 8px; border-radius: 4px; white-space: pre-wrap; }
.editor-panel-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; background: var(--bg-surface); border-bottom: 1px solid var(--border-subtle); flex-shrink: 0; } /* layout-exception: editor domain layout */
.editor-panel-subheader { padding: 4px 12px; font-size: 10px; background: var(--bg-surface); border-bottom: 1px solid var(--border-subtle); }

/* Sidebar tabs — layout via .row in markup */
.editor-tabs { display: flex; background: var(--bg-surface); border-bottom: 1px solid var(--border-subtle); flex-shrink: 0; } /* layout-exception: editor domain layout */
.editor-tab { flex: 1; background: none; border: none; border-bottom: 2px solid transparent; color: var(--text-muted); padding: 6px 4px; font-family: inherit; font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; } /* layout-exception: editor domain layout */
.editor-tab:hover:not(:disabled) { color: var(--text-primary); }
.editor-tab:disabled { opacity: 0.3; cursor: not-allowed; }
.editor-tab--active { color: var(--accent-blue); border-bottom-color: var(--accent-blue); }
/* Tab panel visibility — exception: display toggle, not layout */
.editor-tab-panel { display: none; flex-direction: column; flex: 1; overflow-y: auto; } /* layout-exception: editor domain layout */
.editor-tab-panel--active { display: flex; } /* layout-exception: editor domain layout */

/* Slides list — layout via .row in markup */
.editor-add-btn { font-size: 10px; color: var(--accent-blue); text-decoration: none; }
.editor-add-btn:hover { text-decoration: underline; }
.editor-slide-item { display: flex; gap: 8px; padding: 8px 12px; font-size: 12px; color: var(--text-secondary); text-decoration: none; border-bottom: 1px solid var(--border-subtle); cursor: pointer; } /* layout-exception: editor domain layout */
.editor-slide-item:hover { background: var(--bg-overlay); }
.editor-slide-item--active { background: var(--bg-overlay); color: var(--text-bright); border-left: 2px solid var(--accent-blue); }
.editor-slide-pos { color: var(--text-muted); min-width: 20px; }
.editor-slide-count { margin-left: auto; font-size: 10px; color: var(--text-muted); }
.editor-slide-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.editor-action-item { display: flex; gap: 6px; padding: 6px 12px; font-size: 11px; color: var(--text-secondary); text-decoration: none; border-bottom: 1px solid var(--border-subtle); cursor: pointer; } /* layout-exception: editor domain layout */
.editor-action-item:hover { background: var(--bg-overlay); }
.editor-action-item--active { background: var(--bg-overlay); color: var(--text-bright); border-left: 2px solid var(--accent-blue); }
.editor-action-pos { color: var(--text-muted); min-width: 16px; font-size: 10px; }
.editor-action-detail { display: flex; flex-direction: column; gap: 1px; min-width: 0; } /* layout-exception: editor domain layout */
.editor-action-type { font-weight: 600; font-size: 10px; text-transform: uppercase; color: var(--accent-blue); letter-spacing: 0.3px; }
.editor-action-input { font-family: var(--font-mono, monospace); font-size: 11px; color: var(--text-primary); }
.editor-action-trace { font-size: 10px; color: var(--text-muted); }

/* Preview */
.editor-preview-frame { flex: 1; min-height: 0; } /* layout-exception: editor domain layout */
.editor-preview-frame iframe { min-height: 100% !important; height: 100% !important; }
/* Region tabs — layout via .row.row--tight.row--wrap in markup */
.editor-region-tabs { display: flex; gap: 4px; flex-wrap: wrap; } /* layout-exception: editor domain layout */
.editor-region-tab { background: none; border: 1px solid var(--border); border-radius: 4px; color: var(--text-secondary); padding: 2px 8px; font-family: inherit; font-size: 10px; cursor: pointer; }
.editor-region-tab:hover { color: var(--accent-blue); border-color: var(--accent-blue); }
.editor-region-tab--active { color: var(--accent-blue); border-color: var(--accent-blue); background: color-mix(in srgb, var(--accent-blue) 10%, transparent); }

/* Properties panel */
.editor-region-label { font-weight: 600; color: var(--accent-purple); font-size: 11px; }
.editor-props-content { padding: 12px; font-size: 12px; overflow-y: auto; flex: 1; min-height: 0; } /* layout-exception: editor domain layout */
.editor-props-placeholder { color: var(--text-muted); font-style: italic; padding: 24px; text-align: center; font-size: 11px; }

/* Logs */
.editor-log { padding: 6px 12px; font-family: var(--font-mono); font-size: 10px; overflow-y: auto; flex: 1; } /* layout-exception: editor domain layout */
.editor-log .event-entry { display: block; padding: 3px 0; border-bottom: 1px solid var(--border-subtle); }
.editor-log .event-time { color: var(--text-muted); margin-right: 4px; }
.editor-log .event-action { color: var(--accent-blue); }
.editor-log .event-target { display: block; color: var(--accent-green); word-break: break-all; font-size: 9px; }

/* Status bar — exception: margin-top auto for bottom-pinning */
.editor-status-bar { margin-top: auto; padding: 8px; border-top: 1px solid var(--border-subtle); background: var(--bg-surface); flex-shrink: 0; } /* layout-exception: editor domain layout */
.editor-status-btn { width: 100%; padding: 6px; border: none; border-radius: 4px; font-family: inherit; font-size: 11px; font-weight: 600; letter-spacing: 0.5px; cursor: pointer; }
.editor-status-btn--clean { background: var(--accent-green); color: var(--bg-deep); }
.editor-status-btn--dirty { background: var(--accent-red); color: var(--bg-deep); }

/* Diff modal table */
.diff-table { width: 100%; border-collapse: collapse; font-size: 11px; font-family: var(--font-mono); }
.diff-table th { text-align: left; padding: 6px 8px; font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
.diff-table td { padding: 6px 8px; border-bottom: 1px solid var(--border-subtle); vertical-align: top; }
.diff-loc { color: var(--accent-purple); white-space: nowrap; width: 120px; }
.diff-type { text-align: center; font-weight: 700; font-size: 14px; width: 30px; }
.diff-added { color: var(--accent-green); }
.diff-removed { color: var(--accent-red); }
.diff-modified { color: var(--accent-orange); }
.diff-was { color: var(--accent-red); }
.diff-is { color: var(--accent-green); }
.diff-table pre { margin: 0; font-size: 10px; white-space: pre-wrap; max-height: 120px; overflow-y: auto; }
.diff-table code { background: var(--bg-overlay); padding: 1px 4px; border-radius: 3px; }
.diff-actions { white-space: nowrap; }
.diff-btn { background: none; border: 1px solid var(--border); border-radius: 4px; padding: 2px 8px; font-family: inherit; font-size: 10px; cursor: pointer; margin-left: 4px; }
.diff-btn--save { color: var(--accent-green); border-color: var(--accent-green); }
.diff-btn--save:hover { background: var(--accent-green); color: var(--bg-deep); }
.diff-btn--revert { color: var(--accent-red); border-color: var(--accent-red); }
.diff-btn--revert:hover { background: var(--accent-red); color: var(--bg-deep); }
/* Modal footer — layout via .row in markup */
.modal-footer { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-top: 1px solid var(--border-subtle); flex-shrink: 0; } /* layout-exception: modal domain layout */
.form-btn--muted { background: var(--bg-overlay); color: var(--text-secondary); }

/* Props form fields */
.props-field { margin-bottom: 12px; }
.props-label { display: block; font-size: 10px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.props-hint { font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--text-muted); }
.props-input, .props-select, .props-textarea { width: 100%; background: var(--bg-surface); color: var(--text-primary); border: 1px solid var(--border); border-radius: 4px; padding: 6px 8px; font-family: inherit; font-size: 12px; box-sizing: border-box; }
.props-input--sm { width: 80px; }
.props-textarea { font-family: var(--font-mono); font-size: 11px; resize: vertical; }
.props-checkbox { accent-color: var(--accent-blue); }
/* Props actions — layout via .row in markup */
.props-actions { display: flex; align-items: center; gap: 8px; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--border-subtle); } /* layout-exception: props domain layout */
.props-status { font-size: 11px; }
.props-value { font-size: 12px; color: var(--text-primary); padding: 4px 0; }

/* Editor AI assist — exception: flex-shrink for fixed section */
.editor-ai-section { border-top: 1px solid var(--border-subtle); flex-shrink: 0; } /* layout-exception: editor domain layout */
.editor-ai-toggle { padding: 8px 12px; font-size: 11px; font-weight: 600; color: var(--text-muted); cursor: pointer; list-style: none; background: var(--bg-surface); }
.editor-ai-toggle::-webkit-details-marker { display: none; }
.editor-ai-chat { padding: 8px; }