html, body {
    height: 100%;
    margin: 0;
    font-family: 'Segoe UI Variable', 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
    overflow: hidden;
}

#app {
    height: 100%;
}

/* App shell + theme variables 
   The playground owns its shell colors (independent from the Fluent design tokens)
   so that light / dark switching is deterministic. Fluent components follow
   FluentDesignTheme on their own.
*/

.playground {
    --pg-bg: #ffffff;
    --pg-surface: #f7f7f9;
    --pg-text: #1a1a1a;
    --pg-text-muted: #666a73;
    --pg-border: #e3e4e8;
    --pg-accent: #512BD4;
    --pg-hover: rgba(0, 0, 0, 0.05);
    --pg-error: #c42b1c;
    --pg-error-bg: rgba(196, 43, 28, 0.12);
    --pg-ok: #107c10;
    --pg-ok-bg: rgba(16, 124, 16, 0.12);

    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr);
    height: 100dvh;
    background: var(--pg-bg);
    color: var(--pg-text);
}

.playground.pg-dark {
    --pg-bg: #1e1e1e;
    --pg-surface: #252528;
    --pg-text: #e8e8ea;
    --pg-text-muted: #9d9da6;
    --pg-border: #3a3a40;
    --pg-accent: #a58af8;
    --pg-hover: rgba(255, 255, 255, 0.07);
    --pg-error: #f48771;
    --pg-error-bg: rgba(244, 135, 113, 0.14);
    --pg-ok: #6ccb5f;
    --pg-ok-bg: rgba(108, 203, 95, 0.14);
}

/* Header */

.pg-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 14px;
    background: var(--pg-surface);
    border-bottom: 1px solid var(--pg-border);
}

.pg-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.pg-logo {
    width: 28px;
    height: 28px;
    display: block;
}

.pg-title {
    font-size: 17px;
    font-weight: 700;
    white-space: nowrap;
}

.pg-title-accent {
    color: var(--pg-accent);
}

.pg-version {
    font-size: 12px;
    padding: 1px 8px;
    border-radius: 10px;
    background: var(--pg-hover);
    color: var(--pg-text-muted);
    white-space: nowrap;
}

.pg-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Toolbar row (between header and body) */

.pg-toolbar {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    padding: 6px 14px;
    background: var(--pg-surface);
    border-bottom: 1px solid var(--pg-border);
}

.pg-github {
    display: flex;
    align-items: center;
    color: var(--pg-text);
}

.pg-github:hover {
    color: var(--pg-accent);
}

/* Validation status badge */

.pg-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 12px;
    white-space: nowrap;
}

.pg-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.pg-status-valid {
    background: var(--pg-ok-bg);
    color: var(--pg-ok);
}

.pg-status-valid .pg-status-dot {
    background: var(--pg-ok);
}

.pg-status-invalid {
    background: var(--pg-error-bg);
    color: var(--pg-error);
}

.pg-status-invalid .pg-status-dot {
    background: var(--pg-error);
}

/* Body/panes */

.pg-body {
    min-height: 0;
    height: 100%;
}

.pg-body .fluent-multi-splitter {
    height: 100%;
}

.pg-pane {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
    min-height: 0;
    background: var(--pg-bg);
}

.pg-tabbar {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 44px;
    box-sizing: border-box;
    padding: 4px 8px;
    margin-bottom: 6px;
    background: var(--pg-surface);
    border-bottom: 1px solid var(--pg-border);
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: thin;
}

.pg-tabbar > * {
    flex: 0 0 auto;
}

.pg-tabbar > .pg-tab-spacer {
    flex: 1 1 0;
    min-width: 0;
}

.pg-tab {
    appearance: none;
    border: none;
    background: transparent;
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    color: var(--pg-text-muted);
    padding: 6px 12px;
    border-radius: 4px;
    border-bottom: 2px solid transparent;
    cursor: pointer;
}

.pg-tab:hover {
    color: var(--pg-text);
    background: var(--pg-hover);
}

.pg-tab.active {
    color: var(--pg-accent);
    border-bottom-color: var(--pg-accent);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.pg-tab-spacer {
    flex: 1;
}

.pg-pane-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--pg-text-muted);
    padding: 6px 8px;
    white-space: nowrap;
}

.pg-tabpanel {
    flex: 1;
    min-height: 0;
    position: relative;
}

.pg-tabpanel[hidden] {
    display: none !important;
}

/* Monaco hosts */

.pg-editor-host {
    overflow: hidden;
}

.pg-editor-host .monaco-editor-container {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

/* Error decorations (used by DeltaDecorations) */
.cstoml-error-line {
    background: rgba(196, 43, 28, 0.14);
}

.pg-dark .cstoml-error-line {
    background: rgba(244, 135, 113, 0.18);
}

.cstoml-error-glyph {
    background: radial-gradient(circle at 50% 50%, #c42b1c 5px, transparent 6px);
}

.pg-dark .cstoml-error-glyph {
    background: radial-gradient(circle at 50% 50%, #f48771 5px, transparent 6px);
}

/* Options panel */

.pg-options {
    padding: 18px 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.opt-group[hidden] {
    display: none !important;
}

.opt-label {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 8px;
}

.opt-help {
    font-size: 12px;
    color: var(--pg-text-muted);
    margin-top: 6px;
}

.opt-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* File upload error */

.pg-file-error {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    font-size: 13px;
    background: var(--pg-error-bg);
    color: var(--pg-error);
    border-bottom: 1px solid var(--pg-border);
}

/* Problems panel */

.pg-problems {
    overflow-y: auto;
    padding: 14px 16px;
}

.pg-problems-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--pg-error);
    margin-bottom: 10px;
}

.pg-problems-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.pg-problem {
    appearance: none;
    border: 1px solid var(--pg-border);
    border-left: 3px solid var(--pg-error);
    background: var(--pg-surface);
    border-radius: 4px;
    font: inherit;
    text-align: left;
    padding: 8px 10px;
    display: flex;
    gap: 10px;
    align-items: baseline;
    cursor: pointer;
    color: var(--pg-text);
}

.pg-problem:hover {
    background: var(--pg-hover);
}

.pg-problem-line {
    flex-shrink: 0;
    font-size: 12px;
    font-weight: 700;
    color: var(--pg-error);
    min-width: 56px;
}

.pg-problem-message {
    font-size: 13px;
    font-family: Consolas, 'Cascadia Code', monospace;
    white-space: pre-wrap;
    word-break: break-word;
}

/* Status bar */

.pg-statusbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 14px;
    font-size: 12px;
    color: var(--pg-text-muted);
    background: var(--pg-surface);
    border-top: 1px solid var(--pg-border);
    white-space: nowrap;
    overflow: hidden;
}

/* Loading screen */

.loading-container {
    height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0a0c 0%, #16161a 55%, #26262e 100%);
}

.loading-card {
    background: rgba(255, 255, 255, 0.96);
    border-radius: 14px;
    padding: 44px 56px;
    text-align: center;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.30);
}

.loading-logo {
    display: block;
    margin: 0 auto 14px;
}

.loading-title {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
    color: #1a1a1a;
}

.loading-subtitle {
    margin: 6px 0 18px;
    font-size: 14px;
    color: #555555;
}

.loading-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 14px;
}

.loading-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #512BD4;
    animation: pg-bounce 1.2s infinite ease-in-out;
}

.loading-dots .dot:nth-child(2) {
    animation-delay: 0.15s;
}

.loading-dots .dot:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes pg-bounce {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.loading-status {
    font-size: 12px;
    color: #777777;
}

/* Blazor error UI */

#blazor-error-ui {
    background: lightyellow;
    color: #1a1a1a;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

/* Responsive layout
   Desktop (> 768px) keeps the three-pane splitter (pane minimums total 732px).
   At <= 768px the splitter collapses to a single full-height pane and the
   pg-view-switcher segmented tabs in the toolbar pick the visible pane via a
   pg-view-* class on .playground. Panes are hidden with CSS only, so the
   Monaco editors keep their state and AutomaticLayout re-measures them when
   they reappear. */

.pg-view-switcher {
    display: none;
}

@media (max-width: 768px) {
    .pg-body .fluent-multi-splitter {
        display: flex !important;
        flex-direction: column;
    }

    .pg-body .fluent-multi-splitter-bar {
        display: none !important;
    }

    .pg-body .fluent-multi-splitter-pane {
        flex: 1 1 auto !important;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        min-height: 0;
    }

    .pg-view-code .fluent-multi-splitter-pane:not(:has(> .pg-pane-code)),
    .pg-view-output .fluent-multi-splitter-pane:not(:has(> .pg-pane-output)),
    .pg-view-options .fluent-multi-splitter-pane:not(:has(> .pg-pane-options)) {
        display: none !important;
    }

    .pg-toolbar {
        flex-wrap: wrap;
    }

    .pg-toolbar .pg-sample-select {
        flex: 1 1 auto;
        min-width: 0 !important;
        max-width: 100%;
    }

    .pg-view-switcher {
        display: flex;
        flex: 1 1 100%;
        gap: 4px;
        padding: 3px;
        background: var(--pg-hover);
        border-radius: 8px;
    }

    .pg-view-tab {
        appearance: none;
        border: none;
        background: transparent;
        font: inherit;
        font-size: 13px;
        font-weight: 600;
        color: var(--pg-text-muted);
        flex: 1;
        min-height: 38px;
        padding: 4px 0;
        border-radius: 6px;
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        user-select: none;
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }

    .pg-view-tab.active {
        background: var(--pg-bg);
        color: var(--pg-accent);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
    }

    .pg-view-tab-badge {
        font-size: 11px;
        font-weight: 700;
        line-height: 1;
        padding: 2px 6px;
        border-radius: 8px;
        background: var(--pg-error-bg);
        color: var(--pg-error);
    }

    .pg-options {
        padding: 14px 16px;
        gap: 18px;
    }

    /* Larger touch targets for the output JSON/TOML tabs */
    .pg-tab {
        padding: 8px 12px;
        user-select: none;
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
}

/* Small phones: tighter chrome, drop decorative labels */
@media (max-width: 560px) {
    .pg-header,
    .pg-toolbar,
    .pg-statusbar {
        padding-left: 10px;
        padding-right: 10px;
    }

    .pg-version {
        display: none;
    }

    .pg-title {
        font-size: 15px;
    }

    .pg-toolbar .pg-pane-title {
        display: none;
    }

    .loading-card {
        margin: 0 16px;
        padding: 32px 24px;
    }

    .loading-title {
        font-size: 20px;
    }
}