/* LebGen web UI — light theme only */

:root {
    color-scheme: light;
    --page-bg: #eef1f6;
    --surface: #ffffff;
    --surface-muted: #f4f6fa;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;
    --text: #0f172a;
    --text-secondary: #475569;
    --muted: #64748b;
    --accent: #1d4ed8;
    --accent-hover: #1e40af;
    --accent-soft: #eff6ff;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 14px rgba(15, 23, 42, 0.07);
    --radius-lg: 14px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
}

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

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.5;
    background: var(--page-bg);
    color: var(--text);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* ——— Header ——— */
.app-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.25rem 2rem;
    padding: 1.25rem 0;
}

.product-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.tagline {
    margin: 0.35rem 0 0;
    max-width: 42rem;
    font-size: 0.9rem;
    line-height: 1.45;
}

.muted {
    color: var(--muted);
}

.header-locale {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    min-width: 11rem;
}

/* ——— Main layout ——— */
.main-content {
    padding: 1.25rem 0 2rem;
}

.workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
}

.surface {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.surface-head {
    padding: 1.1rem 1.25rem 0;
}

.surface-head--compact {
    padding-bottom: 0.35rem;
}

.surface-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    color: var(--text);
}

.surface-desc {
    margin: 0.45rem 0 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ——— Editor form ——— */
.editor-form {
    padding: 0 1.25rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.35rem;
}

.run-status {
    margin-top: 0.75rem;
    padding: 0.55rem 0.85rem;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent);
}

.run-status-line {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.form-block {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.form-block--json {
    padding-top: 0.25rem;
    border-top: 1px solid var(--border);
    margin-top: 0.15rem;
}

.block-title {
    margin: 0;
    font-size: 0.72rem;
    font-weight: 650;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.block-hint {
    margin: -0.15rem 0 0.15rem;
    font-size: 0.8125rem;
    line-height: 1.45;
    max-width: 52rem;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.25rem;
    padding: 0.85rem 1rem;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.field-stack {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    min-width: 0;
}

.field-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-control {
    width: 100%;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.65rem;
    font: inherit;
    font-size: 0.9rem;
    background: var(--surface);
    color: var(--text);
    transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

.input-control:hover {
    border-color: #94a3b8;
}

.input-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.input-control--code {
    font-family: var(--mono);
    font-size: 0.8rem;
    line-height: 1.45;
    resize: vertical;
    min-height: 12rem;
    tab-size: 2;
}

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

.json-pane {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    min-width: 0;
}

.cv-json-editor {
    margin-top: 0.35rem;
}

.cv-json-editor .input-control--code {
    min-height: 22rem;
}

/* ——— JSON format reference (collapsible) ——— */
.format-help {
    margin: 0.35rem 0 0.85rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-muted);
    overflow: hidden;
    transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.format-help:hover {
    border-color: var(--border-strong);
}

.format-help[open] {
    box-shadow: var(--shadow-sm);
    border-color: var(--border-strong);
}

.format-help-summary {
    list-style: none;
    cursor: pointer;
    padding: 0.65rem 0.85rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    user-select: none;
}

.format-help-summary::-webkit-details-marker {
    display: none;
}

.format-help-summary::after {
    content: "";
    width: 0.5rem;
    height: 0.5rem;
    margin-left: auto;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    transform: rotate(45deg);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.format-help[open] .format-help-summary::after {
    transform: rotate(-135deg);
    margin-top: 0.2rem;
}

.format-help-summary:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.55);
}

.format-help-summary:focus {
    outline: none;
}

.format-help-summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.format-help-summary-inner {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.format-help-icon {
    display: flex;
    color: var(--accent);
    flex-shrink: 0;
}

.format-help-panel {
    padding: 0 0.85rem 0.85rem;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.format-help-lead {
    margin: 0.75rem 0 0.85rem;
    font-size: 0.8125rem;
    line-height: 1.55;
    color: var(--text-secondary);
}

.format-help-lead--tight {
    margin-top: 0.5rem;
    margin-bottom: 0.65rem;
}

.format-help--prompt {
    margin-top: 0.5rem;
}

.format-help-icon--prompt {
    color: #7c3aed;
}

.format-help-subtitle {
    margin: 0 0 0.45rem;
    font-size: 0.8125rem;
    font-weight: 650;
    color: var(--text);
}

.format-help-overview {
    margin: 0 0 1rem;
    padding: 0.75rem 0.85rem;
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.65);
}

.format-help-overview-p {
    margin: 0 0 0.45rem;
    font-size: 0.8125rem;
    line-height: 1.55;
    color: var(--text-secondary);
}

.format-help-overview-p:last-of-type {
    margin-bottom: 0.5rem;
}

.format-help-tips {
    margin: 0.5rem 0 0;
    padding-left: 1.1rem;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--muted);
}

.format-help-tips li {
    margin-bottom: 0.35rem;
}

.format-help-tips li:last-child {
    margin-bottom: 0;
}

.cv-prompt-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.85rem;
    margin-bottom: 0.55rem;
}

.cv-prompt-toolbar-hint {
    font-size: 0.78rem;
    min-height: 1.2em;
}

.cv-prompt-textarea {
    min-height: 14rem;
    max-height: 22rem;
    resize: vertical;
    line-height: 1.45;
}

.format-help-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.format-help-card {
    padding: 0.75rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
}

.format-help-card-title {
    margin: 0 0 0.5rem;
    font-size: 0.78rem;
    font-weight: 650;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.format-help-list {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--text);
}

.format-help-list li {
    margin-bottom: 0.4rem;
}

.format-help-list li:last-child {
    margin-bottom: 0;
}

.format-help-list li span {
    font-variant-numeric: tabular-nums;
}

.format-help-platforms {
    margin: 0.65rem 0 0;
    padding-top: 0.55rem;
    border-top: 1px dashed var(--border);
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--muted);
}

.format-help-platform-codes {
    display: inline;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.format-help-platform-codes code {
    font-size: inherit;
    padding: 0.08rem 0.28rem;
    border-radius: 4px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
}

/* ——— Action bar (editor) ——— */
.action-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 0.85rem;
    padding-top: 0.75rem;
    margin-top: 0.1rem;
    border-top: 1px solid var(--border);
}

.action-bar--editor {
    align-items: flex-end;
}

.action-group {
    flex: 1 1 12rem;
    min-width: 0;
    padding: 0.65rem 0.85rem;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.action-group-label {
    font-size: 0.72rem;
    font-weight: 650;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.action-group-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

.btn-primary {
    background: var(--accent);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-secondary);
    border-color: var(--border-strong);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--surface-muted);
    border-color: #94a3b8;
    color: var(--text);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.file-input {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    max-width: 100%;
}

.file-input::file-selector-button {
    margin-right: 0.65rem;
    padding: 0.4rem 0.75rem;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 600;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
    color: var(--text-secondary);
    cursor: pointer;
}

.file-input::file-selector-button:hover {
    background: #e8ecf3;
    color: var(--text);
}

/* ——— Preview ——— */
.preview-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem 1rem;
    padding: 1rem 1.25rem 0.65rem;
    border-bottom: 1px solid var(--border);
}

.preview-toolbar-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    color: var(--text);
}

.preview-toolbar .btn {
    flex-shrink: 0;
}

.preview-mount {
    padding: 0.85rem 1.25rem 1.25rem;
    min-height: 720px;
}

.preview-frame {
    display: block;
    width: 100%;
    height: 780px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #ffffff;
    box-shadow: var(--shadow-sm);
}

.panel-error {
    border: 1px solid #fecaca;
    border-radius: var(--radius-md);
    background: #fef2f2;
    color: #991b1b;
    padding: 1rem 1.15rem;
}

.panel-error h3 {
    margin: 0 0 0.4rem;
    font-size: 1rem;
    font-weight: 650;
}

.panel-error p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.45;
    word-break: break-word;
}

/* ——— Responsive ——— */
@media (max-width: 1100px) {
    .workspace {
        grid-template-columns: 1fr;
    }

    .json-grid {
        grid-template-columns: 1fr;
    }

    .format-help-grid {
        grid-template-columns: 1fr;
    }

    .preview-mount {
        min-height: 520px;
    }

    .preview-frame {
        height: 600px;
    }
}

@media (max-width: 640px) {
    .options-grid {
        grid-template-columns: 1fr;
    }

    .action-bar--editor {
        flex-direction: column;
        align-items: stretch;
    }

    .action-group {
        flex: 1 1 auto;
    }

    .preview-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .preview-toolbar .btn {
        width: 100%;
    }

    .header-inner {
        padding: 1rem 0;
    }
}