/* ==========================================================================
   Labs Tool — shared stylesheet for Aiifi Labs tool pages
   Used by: /chatgpt-table-to-excel (and future Labs tools)
   Reuses tokens from style.css (no Tailwind, no CDN)
   ========================================================================== */

/* --------------------------------------------------------------------------
   Hero overrides for Labs tool pages
   -------------------------------------------------------------------------- */
.labs-tool-hero {
    padding: 0.75rem 0 0.5rem;
    border-bottom: 1px solid var(--color-border-light);
}

.labs-tool-hero .hero-content {
    text-align: left;
    max-width: 720px;
    margin: 0 auto;
}

.labs-tool-hero h1 {
    font-size: clamp(2.05rem, 3.2vw, 2.35rem);
    line-height: 1.08;
    margin: 0 0 0.3rem;
}

.labs-tool-hero .hero-content .labs-tool-hero-subhead {
    font-size: 0.97rem;
    line-height: 1.45;
    color: var(--color-text-secondary);
    margin: 0 0 0.35rem;
    max-width: 60ch;
}

.labs-tool-hero .hero-content .labs-tool-hero-meta {
    font-size: 0.82rem;
    line-height: 1.35;
    color: var(--color-text-secondary);
    margin: 0;
}

/* --------------------------------------------------------------------------
   Tool shell: input + preview grid + actions + status
   -------------------------------------------------------------------------- */
.labs-tool-shell {
    padding: var(--spacing-md) 0 0;
}

.labs-tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.labs-tool-input,
.labs-tool-preview {
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card-hover);
    padding: var(--spacing-md);
}

.labs-tool-label {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    display: block;
}

.labs-tool-textarea {
    width: 100%;
    min-height: 360px;
    flex: 1;
    font-family: 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-form);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    resize: vertical;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.labs-tool-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.labs-tool-textarea::placeholder {
    color: var(--color-placeholder);
}

.labs-tool-helper {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin: var(--spacing-xs) 0 var(--spacing-sm);
}

.labs-tool-input-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.labs-tool-summary {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    display: block;
    min-height: 1.4em;
    line-height: 1.4;
}

.labs-tool-summary:empty {
    display: none;
}

.labs-tool-summary.is-valid {
    color: var(--color-accent-hover);
}

.labs-tool-summary.is-invalid {
    color: #b91c1c;
}

/* When summary is populated, hide the static "Your table for Excel or Sheets" label
   so the preview box does not shift downward */
.labs-tool-preview:has(.labs-tool-summary.is-valid) > .labs-tool-label,
.labs-tool-preview:has(.labs-tool-summary.is-invalid) > .labs-tool-label {
    display: none;
}

.labs-tool-preview-table {
    min-height: 360px;
    max-height: 600px;
    flex: 1;
    overflow: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    padding: var(--spacing-sm);
}

.labs-tool-preview-table:empty::before {
    content: "Paste a markdown table to see the preview here.";
    display: block;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    padding: var(--spacing-md);
    text-align: center;
}

.labs-tool-preview-table table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-body);
    font-size: 0.875rem;
}

.labs-tool-preview-table th,
.labs-tool-preview-table td {
    border: 1px solid var(--color-border);
    padding: 0.5rem 0.75rem;
    text-align: left;
    vertical-align: top;
}

.labs-tool-preview-table th {
    font-weight: 600;
    color: var(--color-text-primary);
    border-bottom: 2px solid var(--color-border);
}

.labs-tool-preview-table td {
    color: var(--color-text-secondary);
}

.labs-tool-preview-table tr:hover td {
    background: var(--color-accent-light);
}

/* --------------------------------------------------------------------------
   Action bar + status
   -------------------------------------------------------------------------- */
.labs-tool-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: flex-end;
    margin-top: var(--spacing-sm);
}

.labs-tool-btn {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast),
        border-color var(--transition-fast), box-shadow var(--transition-fast),
        transform var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
}

.labs-tool-btn--primary {
    background: var(--gradient-primary);
    color: #ffffff;
    border-color: transparent;
}

.labs-tool-btn--primary:hover:not(:disabled) {
    box-shadow: var(--shadow-accent);
    transform: translateY(-1px);
}

.labs-tool-btn--ghost {
    background: var(--color-bg-card);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

.labs-tool-btn--ghost:hover:not(:disabled) {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent);
    color: var(--color-accent-hover);
}

.labs-tool-btn--small {
    padding: 0.4rem 0.85rem;
    font-size: 0.8125rem;
}

.labs-tool-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.labs-tool-btn:focus-visible {
    outline: 3px solid var(--color-accent-light);
    outline-offset: 2px;
}

.labs-tool-status {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.labs-tool-status:empty {
    display: none;
}

.labs-tool-status:not(:empty) {
    margin-top: var(--spacing-sm);
}

.labs-tool-btn.is-success {
    transform: none;
}

.labs-tool-status.is-success {
    color: var(--color-accent-hover);
    font-weight: 500;
}

.labs-tool-status.is-error {
    color: #b91c1c;
    font-weight: 500;
}

.labs-tool-privacy-note {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin: var(--spacing-xs) 0 0;
}

/* --------------------------------------------------------------------------
   Main prose content below the tool
   -------------------------------------------------------------------------- */
.labs-tool-content {
    padding: 0 0 var(--spacing-2xl);
}

.labs-tool-prose {
    max-width: var(--content-width-medium, 800px);
}

.labs-tool-prose > section:first-child {
    border-top: 1px solid rgba(0, 112, 204, 0.12);
    padding-top: var(--spacing-md);
}

.labs-tool-prose section {
    padding-bottom: 28px;
    margin-bottom: 32px;
    border-bottom: 1px solid rgba(0, 112, 204, 0.12);
    scroll-margin-top: 80px;
}

.labs-tool-prose section:last-child {
    padding-bottom: 0;
    margin-bottom: 0;
    border-bottom: none;
}

.labs-tool-prose h2 {
    position: relative;
    font-size: 26px;
    font-weight: 700;
    line-height: 34px;
    margin-top: 0;
    margin-bottom: 16px;
    padding-left: 16px;
    color: #000;
    -webkit-text-fill-color: #000;
    scroll-margin-top: 80px;
}

.labs-tool-prose h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 5px;
    border-radius: 999px;
    background: linear-gradient(180deg, #00c0d4, #0080ff);
}

.labs-tool-prose h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 30px;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: #000;
}

.labs-tool-prose p {
    font-size: 17px;
    line-height: 26px;
    color: #000;
    margin-bottom: 16px;
}

.labs-tool-prose code {
    font-family: 'SF Mono', Menlo, Consolas, monospace;
    font-size: 0.875em;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    padding: 0.1em 0.4em;
    border-radius: var(--radius-sm);
    color: #000;
}

.labs-tool-prose ol,
.labs-tool-prose ul {
    padding-left: 1.5rem;
    margin: var(--spacing-sm) 0;
    color: #000;
}

.labs-tool-prose li {
    font-size: 17px;
    line-height: 26px;
    margin-bottom: 0.35rem;
    color: #000;
}

.labs-tool-prose a {
    color: #0070cc;
    text-decoration: none;
    border-bottom: none;
}

.labs-tool-prose a:hover {
    color: #0070cc;
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* FAQ visible list (no accordions) */
.labs-tool-faq .faq-item {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.labs-tool-faq .faq-item:last-child {
    border-bottom: none;
}

.labs-tool-faq .faq-item h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
    font-size: 17px;
    line-height: 26px;
    font-weight: 600;
    color: #000;
}

.labs-tool-faq .faq-item p {
    margin-bottom: 0;
}

/* Related links */
.labs-tool-related ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.labs-tool-related li {
    margin-bottom: 0.35rem;
}

/* --------------------------------------------------------------------------
   Mobile: stack grid, sticky action bar, full-width textarea
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .labs-tool-hero {
        padding: 0.65rem 0 0.45rem;
    }

    .labs-tool-hero h1 {
        font-size: 1.65rem;
        margin-bottom: 0.25rem;
    }

    .labs-tool-hero .hero-content .labs-tool-hero-subhead {
        font-size: 0.9rem;
        line-height: 1.4;
        margin-bottom: 0.3rem;
    }

    .labs-tool-hero .hero-content .labs-tool-hero-meta {
        font-size: 0.8rem;
    }

    .labs-tool-shell {
        padding: var(--spacing-sm) 0 var(--spacing-md);
    }

    .labs-tool-grid {
        grid-template-columns: 1fr;
    }

    .labs-tool-input,
    .labs-tool-preview {
        padding: var(--spacing-sm);
    }

    .labs-tool-textarea {
        flex: 0 0 240px;
        min-height: 0;
    }

    .labs-tool-preview-table {
        flex: 0 0 240px;
        min-height: 0;
        max-height: 400px;
    }

    .labs-tool-actions,
    .labs-tool-input-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .labs-tool-btn {
        width: 100%;
    }

    .labs-tool-quick-help .container {
        flex-direction: column;
        align-items: flex-start;
    }
}