/* =====================================================================
   builder-toolbox.css — Public /tools page (Task #321)
   ---------------------------------------------------------------------
   All styles scoped under .bt-page so they don't leak into the rest of
   the app. Uses the existing brand tokens from _tokens.css — NO new
   navy palette is introduced (the navy in the original prompt is
   replaced with the existing brand orange + the public lp-nav already
   themed by landing.css).
   ===================================================================== */

.bt-page-body {
    background: var(--color-bg-muted);
}

.bt-page {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    background: var(--color-bg-muted);
    padding-bottom: 0;
}

/* ---------- Hero ---------- */
.bt-hero {
    position: relative;
    overflow: hidden;
    background: var(--color-bg);
    padding: 120px 0 56px;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.bt-hero-stripe {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    background:
        linear-gradient(135deg,
            transparent 0%,
            transparent 60%,
            rgba(255, 102, 0, 0.06) 60%,
            rgba(255, 102, 0, 0.06) 65%,
            transparent 65%,
            transparent 75%,
            rgba(255, 102, 0, 0.04) 75%,
            rgba(255, 102, 0, 0.04) 80%,
            transparent 80%);
}

.bt-hero-inner {
    position: relative;
    z-index: 1;
}

.bt-hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.bt-hero-sub {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    max-width: 720px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

.bt-hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
}

.bt-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--motion-fast);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.bt-hero-badge:hover {
    color: var(--color-brand-500);
    border-color: var(--color-brand-500);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(255, 102, 0, 0.15);
}

.bt-hero-badge-icon {
    color: var(--color-brand-500);
    font-size: 1.2rem;
}

/* ---------- Trust strip ---------- */
.bt-trust {
    background: var(--color-bg);
    border-top: 2px solid var(--color-brand-500);
    border-bottom: 2px solid var(--color-brand-500);
    padding: 22px 0;
}

.bt-trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: space-around;
    align-items: center;
}

.bt-trust-item {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.95rem;
}

.bt-trust-icon {
    font-size: 1.4rem;
    color: var(--color-brand-500);
}

/* ---------- Calculator section ---------- */
.bt-calc-section {
    padding: 48px 0 64px;
}

.bt-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
    justify-content: center;
}

.bt-tab {
    background: var(--color-bg);
    color: var(--color-text);
    border: 2px solid var(--color-brand-500);
    padding: 12px 22px;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--motion-fast);
    font-family: inherit;
}

.bt-tab:hover {
    background: var(--color-brand-50);
    color: var(--color-brand-600);
}

.bt-tab.is-active {
    background: var(--color-brand-500);
    color: #ffffff;
    border-color: var(--color-brand-500);
    box-shadow: 0 4px 14px rgba(255, 102, 0, 0.3);
}

.bt-panel {
    animation: btFadeIn 0.25s ease;
}

.bt-panel[hidden] {
    display: none !important;
}

@keyframes btFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Cards / Forms ---------- */
.bt-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--color-border);
}

.bt-card-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}

.bt-card-sub {
    color: var(--color-text-muted);
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.bt-section-label {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-brand-600);
    margin-bottom: 12px;
}

.bt-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.bt-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-bg);
    font-family: inherit;
    transition: border-color var(--motion-fast), box-shadow var(--motion-fast);
}

.bt-input:focus {
    outline: none;
    border-color: var(--color-brand-500);
    box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.15);
}

.bt-input.is-invalid {
    border-color: #ef4444;
}

select.bt-input {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23ff6600' stroke-width='2' d='M3 6l5 5 5-5'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 14px;
    padding-right: 36px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

/* ---------- Buttons ---------- */
.bt-btn-primary {
    background: var(--color-brand-500);
    color: #ffffff;
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--motion-fast);
    box-shadow: 0 4px 12px rgba(255, 102, 0, 0.25);
}

.bt-btn-primary:hover {
    background: var(--color-brand-600);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(255, 102, 0, 0.35);
}

.bt-btn-outline {
    background: var(--color-bg);
    color: var(--color-brand-600);
    border: 2px solid var(--color-brand-500);
    padding: 8px 18px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--motion-fast);
}

.bt-btn-outline:hover {
    background: var(--color-brand-500);
    color: #ffffff;
}

.bt-btn-sm {
    padding: 6px 14px;
    font-size: 0.85rem;
}

.bt-btn-link {
    background: none;
    border: none;
    color: #ef4444;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    padding: 4px 8px;
}

.bt-btn-link:hover {
    text-decoration: underline;
}

.bt-actions {
    margin-top: 22px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.bt-error-msg {
    color: #ef4444;
    font-size: 0.9rem;
    margin-top: 12px;
    min-height: 1.2em;
    font-weight: 500;
}

.bt-input-error {
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 4px;
    display: block;
}

/* ---------- Wall row ---------- */
.bt-wall-row {
    background: var(--color-bg-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 12px;
}

.bt-wall-row-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.bt-wall-row-title {
    font-weight: 700;
    color: var(--color-brand-600);
    font-size: 0.9rem;
}

/* ---------- Hardware fields hidden when toggle is no ---------- */
.bt-hardware-fields.is-hidden {
    display: none;
}

/* ---------- Results panel ---------- */
.bt-results {
    margin-top: 28px;
    animation: btFadeIn 0.4s ease;
}

.bt-result-block {
    background: var(--color-bg-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 22px;
    margin-bottom: 18px;
}

.bt-result-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-brand-600);
    margin-bottom: 14px;
    border-bottom: 2px solid var(--color-brand-500);
    padding-bottom: 8px;
}

.bt-result-table {
    width: 100%;
    font-family: 'SFMono-Regular', Consolas, 'Courier New', monospace;
    font-size: 0.92rem;
    border-collapse: collapse;
}

.bt-result-table tr td {
    padding: 6px 0;
    color: var(--color-text);
    vertical-align: top;
}

.bt-result-table tr td:first-child {
    color: var(--color-text-muted);
    width: 55%;
}

.bt-result-table tr td:last-child {
    text-align: right;
    font-weight: 600;
}

.bt-result-divider {
    border-top: 1px dashed var(--color-border-strong);
    margin: 8px 0;
}

.bt-result-working {
    color: var(--color-text-muted);
    font-size: 0.82rem;
    font-style: italic;
    margin: 4px 0 8px 0;
    font-family: 'SFMono-Regular', Consolas, 'Courier New', monospace;
}

.bt-result-notes {
    background: var(--color-bg);
    border-left: 4px solid var(--color-brand-500);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    margin-top: 14px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.bt-result-notes ul {
    margin: 0;
    padding-left: 20px;
}

.bt-result-notes li {
    margin-bottom: 4px;
}

/* ---------- Legal notice (top of every tab) ---------- */
.bt-legal-notice {
    background: rgba(235, 176, 18, 0.12);
    border: 1px solid var(--color-accent-500);
    border-left: 4px solid var(--color-accent-500);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin: 0 0 22px 0;
    color: var(--color-text);
    font-size: 0.9rem;
    line-height: 1.5;
}

.bt-legal-notice-title {
    font-weight: 800;
    color: var(--color-accent-700);
    margin-bottom: 10px;
    font-size: 1rem;
    letter-spacing: 0.01em;
}

.bt-legal-notice p {
    margin: 0 0 8px 0;
}

/* ---------- Legal footer (under every result block) ---------- */
.bt-legal-footer {
    margin-top: 12px;
    padding: 10px 14px;
    background: var(--color-bg-muted);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 0.8rem;
    font-style: italic;
    text-align: center;
    line-height: 1.4;
}

/* ---------- Blue instruction box (slab class identification) ---------- */
.bt-info-box {
    background: rgba(13, 110, 253, 0.08);
    border-left: 4px solid #0d6efd;
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: var(--color-text);
    font-size: 0.92rem;
}

.bt-info-box strong {
    color: #084298;
}

.bt-info-box ol,
.bt-info-box ul {
    padding-left: 20px;
    margin-bottom: 0;
}

/* ---------- Amber warning / instruction box ---------- */
.bt-amber-box {
    background: rgba(235, 176, 18, 0.12);
    border-left: 4px solid var(--color-accent-500);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: var(--color-text);
    font-size: 0.92rem;
}

.bt-amber-box strong {
    color: var(--color-accent-700);
}

.bt-amber-box ol,
.bt-amber-box ul {
    padding-left: 20px;
}

/* ---------- BOQ Summary block ---------- */
.bt-boq-block {
    background: var(--color-text);
    color: #f0f6fc;
    border-radius: var(--radius-md);
    padding: 16px 18px;
    font-family: 'SFMono-Regular', Consolas, 'Courier New', monospace;
    font-size: 0.88rem;
    white-space: pre-wrap;
    margin-top: 12px;
    line-height: 1.5;
}

.bt-boq-actions {
    margin-top: 10px;
    display: flex;
    gap: 10px;
    align-items: center;
}

.bt-copy-btn {
    background: var(--color-brand-500);
    color: #ffffff;
    border: none;
    padding: 8px 18px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--motion-fast);
}

.bt-copy-btn:hover {
    background: var(--color-brand-600);
}

.bt-copy-btn.is-copied {
    background: #22c55e;
}

/* ---------- Conversion CTA ---------- */
.bt-cta-card {
    background: linear-gradient(135deg, var(--color-brand-500), var(--color-brand-600));
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    margin-top: 22px;
    text-align: center;
    box-shadow: 0 8px 24px rgba(255, 102, 0, 0.25);
}

.bt-cta-card h3 {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: #ffffff;
}

.bt-cta-card p {
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 6px;
}

.bt-cta-card ul {
    list-style: none;
    padding: 0;
    margin: 16px auto;
    max-width: 520px;
    text-align: left;
}

.bt-cta-card ul li {
    padding: 4px 0;
    color: rgba(255, 255, 255, 0.95);
}

.bt-cta-card ul li::before {
    content: "✓";
    margin-right: 10px;
    font-weight: 700;
}

.bt-cta-btn {
    display: inline-block;
    background: #ffffff;
    color: var(--color-brand-600);
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
    margin-top: 14px;
    transition: all var(--motion-fast);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.bt-cta-btn:hover {
    transform: translateY(-2px);
    color: var(--color-brand-600);
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
}

.bt-cta-foot {
    margin-top: 12px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .bt-hero {
        padding: 100px 0 40px;
    }
    .bt-hero-title {
        font-size: 2rem;
    }
    .bt-hero-sub {
        font-size: 1rem;
    }
    .bt-card {
        padding: 20px;
    }
    .bt-tabs {
        flex-direction: column;
    }
    .bt-tab {
        width: 100%;
    }
    .bt-result-table tr td:first-child {
        width: 50%;
    }
}

/* ---------- Dark theme overrides (theme switcher inherited from base) ---------- */
[data-theme="dark"] .bt-page-body,
[data-theme="dark"] .bt-page {
    background: #1a1a1a;
}

[data-theme="dark"] .bt-hero,
[data-theme="dark"] .bt-trust,
[data-theme="dark"] .bt-card,
[data-theme="dark"] .bt-hero-badge {
    background: #242424;
    color: #f0f0f0;
}

[data-theme="dark"] .bt-input {
    background: #1f1f1f;
    color: #f0f0f0;
    border-color: #404040;
}

[data-theme="dark"] .bt-result-block,
[data-theme="dark"] .bt-wall-row {
    background: #1f1f1f;
    border-color: #404040;
}

[data-theme="dark"] .bt-result-notes {
    background: #242424;
    color: #c8c8c8;
}

/* ===== Section 3 + 4 helpers ===================================== */
.bt-help-text {
    display: block;
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 4px;
    line-height: 1.4;
}
.bt-help-inline {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 400;
    margin-left: 4px;
}

/* ===== Extras grid (Section 4) ==================================== */
/* Task #354: drop column min-width to 280px so 375px-wide phones get a
   single, full-width column instead of an awkwardly cramped 360px one. */
.bt-extras {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
    margin-top: 8px;
}
.bt-extra-block {
    background: var(--color-bg-muted);
    border: 1px solid #e5e7eb;
    border-radius: var(--radius-md);
    padding: 14px 16px;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
    /* Task #354: when scrollIntoView fires after a Yes toggle, leave a
       little headroom under the sticky-ish header / above the fold. */
    scroll-margin-top: 16px;
    scroll-margin-bottom: 16px;
}
.bt-extra-block:has(.bt-extra-body.is-open),
.bt-extra-block:has(.bt-toggle-field.is-open) {
    border-color: var(--color-accent-500);
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.bt-extra-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.bt-extra-title {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.94rem;
}
.bt-extra-head .bt-input {
    max-width: 110px;
}
.bt-extra-body {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed #d1d5db;
    scroll-margin-top: 16px;
    scroll-margin-bottom: 16px;
}

/* Task #354 — Touch / small-viewport tuning for Section 4 extras.
   On phones we want:
     • One block per row (already handled by 280px min above)
     • Yes/No selector to meet the 44px min touch-target guideline
     • Revealed dimension inputs to also be ≥44px tall so they're
       easy to tap and easy to spot once scrolled into view. */
@media (max-width: 600px) {
    .bt-extras {
        grid-template-columns: 1fr;
    }
    .bt-extra-head {
        gap: 10px;
    }
    .bt-extra-head .bt-input,
    .bt-extra-block .bt-toggle,
    .bt-extra-block .bt-input,
    .bt-pier-block .bt-input {
        min-height: 44px;
        font-size: 1rem;
    }
    .bt-extra-head .bt-toggle {
        max-width: 120px;
    }
    .bt-pier-title .bt-input-mini {
        max-width: 110px;
        min-height: 44px;
    }
}
.bt-extra-hint {
    margin-top: 8px;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}
[data-theme="dark"] .bt-extra-hint { color: #b8b8b8; }

/* ===== Toggle reveal fields (smooth) ============================== */
.bt-toggle-field[hidden] {
    display: none !important;
}
.bt-toggle-field {
    animation: bt-fadein 0.18s ease;
}
@keyframes bt-fadein {
    from { opacity: 0; transform: translateY(-2px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== Pier sub-blocks ============================================ */
.bt-pier-block {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: var(--radius-sm);
    padding: 10px 12px;
}
.bt-pier-title {
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: 8px;
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.bt-input-mini {
    max-width: 90px;
    font-size: 0.85rem;
}
.bt-bucket-field[hidden] { display: none !important; }

/* ===== Slab result summary header ================================= */
.bt-result-summary {
    background: var(--color-bg-muted);
    border-left: 4px solid var(--color-text);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: var(--color-text);
}

/* ===== Coloured result cards (Steel / Concrete Supply / Concrete Labour) ============== */
.bt-result-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: var(--radius-md);
    margin-bottom: 18px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.bt-result-card-header {
    padding: 12px 18px;
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.02em;
}
.bt-card-blue   .bt-result-card-header { background: #0d6efd; }
.bt-card-green  .bt-result-card-header { background: #198754; }
.bt-card-orange .bt-result-card-header { background: #fd7e14; }
.bt-card-blue   { border-top: 3px solid #0d6efd; }
.bt-card-green  { border-top: 3px solid #198754; }
.bt-card-orange { border-top: 3px solid #fd7e14; }
.bt-card-grand  .bt-result-card-header { background: #1f2937; }
.bt-card-grand  { border-top: 3px solid #1f2937; background: #f9fafb; }

.bt-help-panel {
    margin: 14px 0 18px 0;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    background: #f9fafb;
    padding: 0;
}
.bt-help-panel-summary {
    cursor: pointer;
    padding: 12px 16px;
    font-weight: 600;
    list-style: none;
    color: #1f2937;
}
.bt-help-panel[open] .bt-help-panel-summary { border-bottom: 1px solid #d1d5db; }
.bt-help-panel-body { padding: 12px 16px 16px 16px; font-size: 0.92rem; }
.bt-help-panel-body h4 { margin-top: 12px; margin-bottom: 6px; font-size: 0.95rem; font-weight: 700; }
.bt-help-panel-body ul { margin: 0 0 8px 18px; }

.bt-result-card-body {
    padding: 16px 20px;
    font-size: 0.92rem;
    color: var(--color-text);
}

.bt-result-section {
    margin: 14px 0 6px 0;
    padding-bottom: 4px;
    border-bottom: 1px solid #e5e7eb;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}
.bt-result-section:first-child { margin-top: 0; }

.bt-result-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 0;
}
.bt-result-row strong {
    text-align: right;
    color: var(--color-text);
}
.bt-result-total {
    margin-top: 6px;
    padding-top: 8px;
    border-top: 2px solid var(--color-text);
    font-size: 1rem;
}
.bt-result-divider {
    height: 1px;
    background: #e5e7eb;
    margin: 10px 0;
}
.bt-result-working {
    font-family: 'SF Mono', Menlo, Consolas, monospace;
    font-size: 0.78rem;
    color: var(--color-text-muted);
    padding: 2px 0 6px 8px;
    line-height: 1.45;
}
.bt-result-warn {
    background: rgba(235, 176, 18, 0.15);
    border-left: 3px solid var(--color-accent-500);
    padding: 6px 10px;
    font-size: 0.85rem;
    margin: 4px 0;
    border-radius: 3px;
}
.bt-result-note {
    font-style: italic;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    padding: 4px 0;
}
.bt-card-actions {
    padding: 10px 18px;
    border-top: 1px solid #f0f0f0;
    background: #fafafa;
}

/* ===== Dark theme tweaks for new components ======================= */
[data-theme="dark"] .bt-extra-block,
[data-theme="dark"] .bt-result-summary {
    background: #242424;
    border-color: #3a3a3a;
}
[data-theme="dark"] .bt-pier-block,
[data-theme="dark"] .bt-result-card {
    background: #1f1f1f;
    border-color: #3a3a3a;
}
[data-theme="dark"] .bt-result-card-body { color: #f0f0f0; }
[data-theme="dark"] .bt-result-section { color: #aaa; border-bottom-color: #3a3a3a; }
[data-theme="dark"] .bt-result-divider { background: #3a3a3a; }
[data-theme="dark"] .bt-card-actions { background: #1a1a1a; border-top-color: #3a3a3a; }
[data-theme="dark"] .bt-info-box { background: rgba(13,110,253,0.18); }
[data-theme="dark"] .bt-legal-footer { background: #242424; color: #aaa; }

/* ===== Print stylesheet (Task #343) ================================
   Used both by the in-page tab (if the user prints from there) and as
   a fallback inside the dedicated PDF window. Keeps cards intact,
   strips interactive bits, and gives sensible margins. */
@media print {
    .bt-tabs, .bt-actions, .bt-card-actions, .bt-boq-actions,
    .bt-cta-card, .bt-help-panel, .bt-error-msg, .bt-hero,
    .bt-tab, #bt-slab-form, .alert {
        display: none !important;
    }
    body { background: #fff !important; color: #111 !important; }
    .bt-result-card, .bt-result-block, .bt-result-summary {
        page-break-inside: avoid;
        break-inside: avoid;
        box-shadow: none !important;
        border: 1px solid #d1d5db !important;
        margin-bottom: 12px !important;
    }
    .bt-result-row { page-break-inside: avoid; break-inside: avoid; }
    .bt-card-grand { page-break-before: auto; }
    .bt-boq-block { white-space: pre-wrap; }
    @page { size: A4; margin: 14mm 12mm; }
}