/* ── Theme variables ── */
:root,
[data-theme="dark"] {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --bg-hover: #3e3e42;
    --text-primary: #cccccc;
    --text-secondary: #969696;
    --text-muted: #6e6e6e;
    --border: #3e3e42;
    --accent: #0078d4;
    --accent-hover: #1a8ae8;
    --error: #f44747;
    --error-bg: rgba(244, 71, 71, 0.12);
    --success: #6a9955;
    --panel-header: #2d2d30;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f3f3f3;
    --bg-tertiary: #e8e8e8;
    --bg-hover: #e0e0e0;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border: #d0d0d0;
    --accent: #0066b8;
    --accent-hover: #005da6;
    --error: #d32f2f;
    --error-bg: rgba(211, 47, 47, 0.08);
    --success: #388e3c;
    --panel-header: #e8e8e8;
}

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; }

html, body, #app {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-primary);
}

/* ── Toolbar ── */
.playground-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    height: 42px;
    flex-shrink: 0;
}

.playground-toolbar h1 {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
}

.spacer { flex: 1; }

.toolbar-btn {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    white-space: nowrap;
}

.toolbar-btn:hover { background: var(--bg-hover); }
.toolbar-btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.toolbar-btn.primary:hover { background: var(--accent-hover); }

.toolbar-select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 13px;
    max-width: 220px;
}

.theme-toggle-btn {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
}

.theme-toggle-btn:hover { background: var(--bg-hover); }

/* ── Sample description ── */
.sample-description {
    padding: 4px 12px;
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

/* ── Grid layout ── */
.jsonlogic-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 1px;
    background: var(--border);
    flex: 1;
    overflow: hidden;
    /* Fill remaining viewport */
    height: calc(100vh - 42px - 24px); /* toolbar + status bar */
}

.sample-description ~ .jsonlogic-grid {
    height: calc(100vh - 42px - 24px - 26px);
}

.panel-rule  { grid-column: 1; grid-row: 1 / span 2; }
.panel-data  { grid-column: 2; grid-row: 1; }
.panel-output { grid-column: 2; grid-row: 2; }

.has-maximized .panel-hidden { display: none !important; }
.has-maximized .panel-maximized { grid-column: 1 / -1; grid-row: 1 / -1; }

/* ── Panels ── */
.playground-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: var(--panel-header);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

/* ── Panel tabs (Schema | Data) ── */
.panel-tab {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    padding: 4px 8px;
    margin: 0;
    transition: color 0.15s, border-color 0.15s;
}

.panel-tab:hover {
    color: var(--text-primary);
}

.panel-tab--active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.schema-status {
    font-size: 11px;
    opacity: 0.7;
}

.panel-body {
    flex: 1;
    overflow: hidden;
    position: relative;
    min-height: 0;
}

/* BlazorMonaco editor containers must fill their parent */
.panel-body .monaco-editor-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.panel-body--builder {
    overflow-y: auto;
    padding: 12px;
}

.panel-copy-btn,
.panel-maximize-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    padding: 1px 4px;
    border-radius: 3px;
    color: var(--text-secondary);
}

.panel-copy-btn:hover,
.panel-maximize-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ── Error output ── */
.error-output {
    padding: 12px 16px;
    color: var(--error);
    background: var(--error-bg);
    font-family: "Cascadia Code", "Fira Code", Consolas, monospace;
    font-size: 13px;
    white-space: pre-wrap;
    overflow-y: auto;
    height: 100%;
}

/* ── Status bar ── */
.status-bar {
    display: flex;
    align-items: center;
    padding: 2px 12px;
    font-size: 12px;
    background: var(--accent);
    color: #fff;
    height: 24px;
    flex-shrink: 0;
}

.status-bar--error {
    background: var(--error);
}

/* ── Rule Builder container ── */
.rule-builder {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.rule-builder__tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.rule-builder__tab {
    padding: 6px 16px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
}

.rule-builder__tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.rule-builder__tab.active {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-bottom-color: var(--accent);
}

.rule-builder__content {
    overflow: hidden;
    position: absolute;
    inset: 0;
}

.rule-builder__content--active {
    visibility: visible;
    z-index: 1;
}

.rule-builder__content--hidden {
    visibility: hidden;
    pointer-events: none;
    z-index: -1;
}

.rule-builder__panels {
    position: relative;
    flex: 1;
    min-height: 0;
}

.rule-builder__visual {
    padding: 12px;
    overflow: auto;
    height: 100%;
}

/* Blockly workspace fills the visual panel */
.blockly-editor {
    width: 100%;
    height: 100%;
    min-height: 400px;
}

.rule-builder__error {
    padding: 6px 12px;
    font-size: 12px;
    color: var(--error);
    background: var(--error-bg);
    border-bottom: 1px solid var(--error);
}


/* ── Modal ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-dialog {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 24px;
    max-width: 400px;
    width: 90%;
}

.modal-dialog h3 {
    margin: 0 0 8px;
}

.modal-dialog p {
    margin: 0 0 16px;
    color: var(--text-secondary);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}