/* ============================================================
   Density Calculator - Single Column Modern Layout
   ============================================================ */

.putdc-section .pute-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px 50px;
}

/* ── Calculator Card ─────────────────────────────────────────── */
.putdc-calc-card {
    margin-top: 50px;
    background: var(--st-white);
    border: 2px solid #ffe0cc;
    border-radius: var(--st-radius-lg);
    overflow: hidden;
    box-shadow: var(--st-shadow-md);
}

.putdc-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 28px;
    background: linear-gradient(135deg, #fff4ef 0%, #fff8f0 100%);
    border-bottom: 2px solid #ffe0cc;
}

.putdc-card-header .dashicons {
    font-size: 1.5rem;
    width: 28px;
    height: 28px;
    line-height: 1;
    color: var(--st-primary);
}

.putdc-card-header h3 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--st-secondary);
}

/* ── Form ────────────────────────────────────────────────────── */
.putdc-form {
    padding: 28px;
}

.putdc-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 20px;
    align-items: start;
}

.putdc-field label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--st-secondary);
    margin-bottom: 5px;
}

.putdc-input-wrap {
    position: relative;
}

.putdc-input-wrap input {
    width: 100%;
    padding: 11px 50px 11px 14px;
    border: 2px solid var(--st-border);
    border-radius: var(--st-radius);
    font-size: 1rem;
    font-weight: 500;
    color: var(--st-text);
    outline: none;
    transition: border-color var(--st-transition);
    box-sizing: border-box;
    background: #fff;
}

.putdc-input-wrap input:focus {
    border-color: var(--st-primary);
    box-shadow: 0 0 0 3px rgba(255, 77, 0, 0.08);
}

.putdc-input-wrap input::placeholder {
    color: #c4c4c4;
    font-weight: 400;
}

.putdc-unit-label {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 800;
    color: var(--st-primary);
    font-size: 0.88rem;
    pointer-events: none;
}

.putdc-unit-select {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    padding: 4px 6px;
    border: 1.5px solid var(--st-border);
    border-radius: var(--st-radius);
    background: #f9fafb;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--st-text);
    cursor: pointer;
    outline: none;
}

.putdc-unit-select:focus {
    border-color: var(--st-primary);
}

.putdc-output-unit-row,
.putml-output-unit-row,
.putmw-precision-row {
    margin-bottom: 20px;
}

.putdc-output-unit-row label,
.putml-output-unit-row label,
.putmw-precision-row label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--st-secondary);
    margin-bottom: 5px;
}

.putdc-unit-select-wide,
.putml-unit-select-wide,
.putmw-unit-select-wide {
    width: 100%;
    max-width: 320px;
    padding: 10px 14px;
    border: 2px solid var(--st-border);
    border-radius: var(--st-radius);
    background: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--st-text);
    cursor: pointer;
    outline: none;
    transition: border-color var(--st-transition);
}

.putdc-unit-select-wide:focus,
.putml-unit-select-wide:focus,
.putmw-unit-select-wide:focus {
    border-color: var(--st-primary);
    box-shadow: 0 0 0 3px rgba(255, 77, 0, 0.08);
}

/* ── Buttons ─────────────────────────────────────────────────── */
.putdc-btn-group,
.putml-btn-group,
.putmw-btn-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Result Card ─────────────────────────────────────────────── */
.putdc-result-card,
.putml-result-card,
.putmw-result-card {
    margin-top: 28px;
    background: var(--st-white);
    border: 2px solid #d1fae5;
    border-radius: var(--st-radius-lg);
    overflow: hidden;
    box-shadow: var(--st-shadow-md);
}

/* ── Result Banner ───────────────────────────────────────────── */
.putdc-result-banner,
.putml-result-banner,
.putmw-result-banner {
    padding: 32px 28px;
    text-align: center;
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 50%, #f0fdf4 100%);
    border-bottom: 1px solid #d1fae5;
}

.putdc-result-equation,
.putml-result-equation,
.putmw-result-equation {
    font-size: 0.95rem;
    font-weight: 600;
    color: #6b7280;
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

.putdc-result-number,
.putml-result-number,
.putmw-result-number {
    font-size: 2.8rem;
    font-weight: 800;
    color: #059669;
    line-height: 1.1;
    word-break: break-word;
}

/* ── Action Buttons ──────────────────────────────────────────── */
.putdc-result-actions,
.putml-result-actions,
.putmw-result-actions {
    display: flex;
    gap: 10px;
    padding: 14px 28px;
    border-bottom: 1px solid #e5e7eb;
    justify-content: center;
    flex-wrap: wrap;
}

.putdc-action-btn,
.putml-action-btn,
.putmw-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1.5px solid var(--st-border);
    border-radius: var(--st-radius);
    background: #fff;
    color: var(--st-text);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--st-transition);
}

.putdc-action-btn:hover,
.putml-action-btn:hover,
.putmw-action-btn:hover {
    border-color: var(--st-primary);
    color: var(--st-primary);
    background: #fff8f0;
}

.putdc-action-btn .dashicons,
.putml-action-btn .dashicons,
.putmw-action-btn .dashicons {
    font-size: 16px;
    width: 16px;
    height: 16px;
    line-height: 1;
}

/* ── Details Row (Breakdown + Info side by side) ─────────────── */
.putdc-details-row,
.putml-details-row,
.putmw-details-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.putdc-detail-card,
.putml-detail-card,
.putmw-detail-card {
    padding: 0;
}

.putdc-breakdown-card,
.putml-breakdown-card,
.putmw-breakdown-card {
    border-right: 1px solid #e5e7eb;
}

.putdc-detail-card-header,
.putml-detail-card-header,
.putmw-detail-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: #f9fafb;
    border-bottom: 1px solid #e5e7eb;
}

.putdc-detail-card-header .dashicons,
.putml-detail-card-header .dashicons,
.putmw-detail-card-header .dashicons {
    font-size: 18px;
    width: 18px;
    height: 18px;
    line-height: 1;
    color: var(--st-primary);
}

.putdc-detail-card-header h4,
.putml-detail-card-header h4,
.putmw-detail-card-header h4 {
    margin: 0;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--st-secondary);
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.putdc-detail-card-body,
.putml-detail-card-body,
.putmw-detail-card-body {
    padding: 4px 0;
}

.putdc-detail-line,
.putml-detail-line,
.putmw-detail-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 24px;
    border-bottom: 1px solid #f3f4f6;
}

.putdc-detail-line:last-child,
.putml-detail-line:last-child,
.putmw-detail-line:last-child {
    border-bottom: none;
}

.putdc-detail-key,
.putml-detail-key,
.putmw-detail-key {
    font-size: 0.85rem;
    font-weight: 600;
    color: #6b7280;
}

.putdc-detail-val,
.putml-detail-val,
.putmw-detail-val {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--st-text);
    text-align: right;
    word-break: break-word;
    max-width: 55%;
}

.putdc-detail-line-answer,
.putml-detail-line-answer,
.putmw-detail-line-answer {
    background: #f0fdf4;
}

.putdc-detail-line-answer .putdc-detail-val,
.putml-detail-line-answer .putml-detail-val,
.putmw-detail-line-answer .putmw-detail-val {
    color: #059669;
    font-weight: 800;
}

/* ── Density Materials Reference Card ────────────────────────── */
.putdc-ref-card {
    border-top: 1px solid #e5e7eb;
}

.putdc-ref-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 10px;
    padding: 20px 24px 24px;
}

.putdc-ref-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: #fff8f0;
    border: 1px solid #ffe0cc;
    border-radius: var(--st-radius);
}

.putdc-ref-badge {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--st-primary);
}

.putdc-ref-val {
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--st-text);
}

/* ── Molecular Weight Element Breakdown Rows ─────────────────── */
.putmw-element-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 24px;
    border-bottom: 1px solid #f3f4f6;
}

.putmw-element-row .putmw-detail-key {
    display: flex;
    align-items: center;
    gap: 8px;
}

.putmw-element-symbol {
    display: inline-block;
    min-width: 28px;
    padding: 2px 8px;
    background: #fff4ef;
    border: 1px solid #ffe0cc;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 800;
    color: var(--st-primary);
    text-align: center;
}

/* ── Educational Card ────────────────────────────────────────── */
.putdc-edu-card,
.putml-edu-card,
.putmw-edu-card {
    border-top: 1px solid #e5e7eb;
}

.putdc-edu-body,
.putml-edu-body,
.putmw-edu-body {
    padding: 20px 24px 24px;
}

.putdc-edu-body > p,
.putml-edu-body > p,
.putmw-edu-body > p {
    margin: 0 0 18px;
    font-size: 0.9rem;
    color: #6b7280;
    line-height: 1.65;
}

.putdc-edu-formula-box,
.putml-edu-formula-box,
.putmw-edu-formula-box {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: var(--st-radius);
    overflow: hidden;
}

.putdc-edu-formula-title,
.putml-edu-formula-title,
.putmw-edu-formula-title {
    padding: 10px 16px;
    background: #f3f4f6;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--st-secondary);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    border-bottom: 1px solid #e5e7eb;
}

.putdc-edu-formula-row,
.putml-edu-formula-row,
.putmw-edu-formula-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 11px 16px;
    border-bottom: 1px solid #f3f4f6;
}

.putdc-edu-formula-row:last-child,
.putml-edu-formula-row:last-child,
.putmw-edu-formula-row:last-child {
    border-bottom: none;
}

.putdc-edu-formula-tag,
.putml-edu-formula-tag,
.putmw-edu-formula-tag {
    display: inline-block;
    padding: 3px 10px;
    background: #fff8f0;
    border: 1px solid #ffe0cc;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--st-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.putdc-edu-formula-eq,
.putml-edu-formula-eq,
.putmw-edu-formula-eq {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--st-text);
}

/* ── Examples Card ───────────────────────────────────────────── */
.putdc-examples-card,
.putml-examples-card {
    border-top: 1px solid #e5e7eb;
}

.putdc-examples-grid,
.putml-examples-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    padding: 20px 24px 24px;
}

.putdc-example-item,
.putml-example-item {
    padding: 16px;
    background: #fff8f0;
    border: 1px solid #ffe0cc;
    border-radius: var(--st-radius);
}

.putdc-example-badge,
.putml-example-badge {
    display: inline-block;
    padding: 2px 10px;
    background: var(--st-gradient);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 50px;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.putdc-example-body,
.putml-example-body {
    font-size: 0.85rem;
    color: #6b7280;
    line-height: 1.55;
}

.putdc-example-body strong,
.putml-example-body strong {
    color: var(--st-text);
}

/* ── Disclaimer ──────────────────────────────────────────────── */
.putdc-disclaimer,
.putml-disclaimer,
.putmw-disclaimer {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin: 0;
    padding: 14px 24px;
    background: #fffbeb;
    border-top: 1px solid #fde68a;
}

.putdc-disclaimer .dashicons,
.putml-disclaimer .dashicons,
.putmw-disclaimer .dashicons {
    color: #d97706;
    font-size: 20px;
    width: 20px;
    height: 20px;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
}

.putdc-disclaimer p,
.putml-disclaimer p,
.putmw-disclaimer p {
    margin: 0;
    font-size: 0.84rem;
    color: #92400e;
    line-height: 1.5;
}

/* ============================================================
   Custom Warning Modal
   ============================================================ */
.putdc-modal-overlay,
.putml-modal-overlay,
.putmw-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 999999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.putdc-modal-overlay.putdc-modal-show,
.putml-modal-overlay.putml-modal-show,
.putmw-modal-overlay.putmw-modal-show {
    opacity: 1;
}

.putdc-modal-card,
.putml-modal-card,
.putmw-modal-card {
    background: #fff;
    border-radius: var(--st-radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 420px;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform 0.2s ease;
}

.putdc-modal-overlay.putdc-modal-show .putdc-modal-card,
.putml-modal-overlay.putml-modal-show .putml-modal-card,
.putmw-modal-overlay.putmw-modal-show .putmw-modal-card {
    transform: scale(1);
}

.putdc-modal-header,
.putml-modal-header,
.putmw-modal-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
    background: linear-gradient(135deg, #fff4ef, #fff8f0);
    border-bottom: 2px solid #ffe0cc;
}

.putdc-modal-header .dashicons-warning,
.putml-modal-header .dashicons-warning,
.putmw-modal-header .dashicons-warning {
    color: #d97706;
    font-size: 24px;
    width: 24px;
    height: 24px;
    line-height: 1;
    flex-shrink: 0;
}

.putdc-modal-header h4,
.putml-modal-header h4,
.putmw-modal-header h4 {
    margin: 0;
    flex: 1;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--st-secondary);
}

.putdc-modal-close,
.putml-modal-close,
.putmw-modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--st-text-muted);
    line-height: 1;
    transition: color var(--st-transition);
}

.putdc-modal-close:hover,
.putml-modal-close:hover,
.putmw-modal-close:hover {
    color: #dc2626;
}

.putdc-modal-close .dashicons,
.putml-modal-close .dashicons,
.putmw-modal-close .dashicons {
    font-size: 22px;
    width: 22px;
    height: 22px;
    line-height: 1;
}

.putdc-modal-body,
.putml-modal-body,
.putmw-modal-body {
    padding: 24px 20px;
}

.putdc-modal-body p,
.putml-modal-body p,
.putmw-modal-body p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--st-text);
    line-height: 1.6;
}

/* ============================================================
   Molecular Weight - Formula Input Styles
   ============================================================ */
.putmw-field-wide {
    grid-column: 1 / -1;
}

.putmw-formula-status {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.1rem;
}

.putmw-quick-picks {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.putmw-quick-btn {
    padding: 5px 12px;
    border: 1.5px solid var(--st-border);
    border-radius: 50px;
    background: #fff;
    color: var(--st-text);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--st-transition);
}

.putmw-quick-btn:hover {
    border-color: var(--st-primary);
    color: var(--st-primary);
    background: #fff8f0;
}

/* ============================================================
   Print / PDF - Proper A4 Layout
   ============================================================ */
@media print {
    @page {
        size: A4 portrait;
        margin: 15mm 12mm;
    }

    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }

    body { margin: 0; padding: 0; background: #fff; }

    .putdc-btn-group, .putdc-result-actions, .putdc-disclaimer, .putdc-modal-overlay,
    .putml-btn-group, .putml-result-actions, .putml-disclaimer, .putml-modal-overlay,
    .putmw-btn-group, .putmw-result-actions, .putmw-disclaimer, .putmw-modal-overlay,
    .pute-single-hero, .pute-single-sidebar,
    .putdc-section .pute-single-breadcrumbs, .putml-section .pute-single-breadcrumbs, .putmw-section .pute-single-breadcrumbs,
    .putdc-section .more-tools, .putml-section .more-tools, .putmw-section .more-tools,
    .putdc-section ~ section, .putml-section ~ section, .putmw-section ~ section {
        display: none !important;
    }

    .putdc-section, .putml-section, .putmw-section { padding: 0 !important; background: #fff !important; }
    .putdc-section .pute-container, .putml-section .pute-container, .putmw-section .pute-container { max-width: 100% !important; padding: 0 !important; margin: 0 !important; }

    .putdc-calc-card, .putml-calc-card, .putmw-calc-card { border: 1.5px solid #ddd !important; box-shadow: none !important; border-radius: 6px !important; break-inside: avoid; page-break-inside: avoid; margin-bottom: 12px; }
    .putdc-card-header, .putml-card-header, .putmw-card-header { padding: 12px 16px !important; background: #f9fafb !important; border-bottom: 1.5px solid #ddd !important; }
    .putdc-card-header h3, .putml-card-header h3, .putmw-card-header h3 { font-size: 1rem !important; color: #111 !important; }
    .putdc-card-header .dashicons, .putml-card-header .dashicons, .putmw-card-header .dashicons { color: #333 !important; }
    .putdc-form, .putml-form, .putmw-form { padding: 16px !important; }
    .putdc-form-grid, .putml-form-grid { grid-template-columns: 1fr 1fr !important; gap: 16px !important; }
    .putdc-input-wrap input, .putml-input-wrap input, .putmw-input-wrap input { border: 1px solid #ccc !important; padding: 8px 40px 8px 10px !important; font-size: 0.9rem !important; }

    .putdc-result-card, .putml-result-card, .putmw-result-card { border: 1.5px solid #ccc !important; box-shadow: none !important; border-radius: 6px !important; margin-top: 12px !important; break-inside: avoid; page-break-inside: avoid; }
    .putdc-result-banner, .putml-result-banner, .putmw-result-banner { padding: 20px 16px !important; background: #f9fafb !important; border-bottom: 1.5px solid #ddd !important; }
    .putdc-result-number, .putml-result-number, .putmw-result-number { font-size: 2rem !important; color: #111 !important; }
    .putdc-result-equation, .putml-result-equation, .putmw-result-equation { font-size: 0.9rem !important; color: #333 !important; }

    .putdc-details-row, .putml-details-row, .putmw-details-row { grid-template-columns: 1fr 1fr !important; border-bottom: 1px solid #ddd !important; }
    .putdc-breakdown-card, .putml-breakdown-card, .putmw-breakdown-card { border-right: 1px solid #ddd !important; }
    .putdc-detail-card-header, .putml-detail-card-header, .putmw-detail-card-header { background: #f3f4f6 !important; padding: 8px 16px !important; border-bottom: 1px solid #ddd !important; }
    .putdc-detail-card-header h4, .putml-detail-card-header h4, .putmw-detail-card-header h4 { font-size: 0.72rem !important; color: #333 !important; }
    .putdc-detail-line, .putml-detail-line, .putmw-detail-line { padding: 7px 16px !important; border-bottom: 1px solid #eee !important; }
    .putdc-detail-key, .putml-detail-key, .putmw-detail-key { font-size: 0.78rem !important; color: #555 !important; }
    .putdc-detail-val, .putml-detail-val, .putmw-detail-val { font-size: 0.78rem !important; color: #111 !important; }
    .putdc-detail-line-answer, .putml-detail-line-answer, .putmw-detail-line-answer { background: #f9fafb !important; }

    .putdc-edu-card, .putml-edu-card, .putmw-edu-card { border-top: 1px solid #ddd !important; break-inside: avoid; page-break-inside: avoid; }
    .putdc-edu-body, .putml-edu-body, .putmw-edu-body { padding: 12px 16px 16px !important; }
    .putdc-edu-body > p, .putml-edu-body > p, .putmw-edu-body > p { font-size: 0.82rem !important; color: #444 !important; }
    .putdc-edu-formula-box, .putml-edu-formula-box, .putmw-edu-formula-box { border: 1px solid #ddd !important; background: #f9fafb !important; }
    .putdc-edu-formula-title, .putml-edu-formula-title, .putmw-edu-formula-title { background: #eee !important; font-size: 0.7rem !important; padding: 7px 12px !important; }
    .putdc-edu-formula-row, .putml-edu-formula-row, .putmw-edu-formula-row { padding: 7px 12px !important; border-bottom: 1px solid #eee !important; }
    .putdc-edu-formula-tag, .putml-edu-formula-tag, .putmw-edu-formula-tag { background: #f3f4f6 !important; border: 1px solid #ddd !important; font-size: 0.68rem !important; color: #333 !important; }
    .putdc-edu-formula-eq, .putml-edu-formula-eq, .putmw-edu-formula-eq { font-size: 0.8rem !important; color: #111 !important; }

    .putdc-examples-card, .putml-examples-card { border-top: 1px solid #ddd !important; break-inside: avoid; page-break-inside: avoid; }
    .putdc-examples-grid, .putml-examples-grid { grid-template-columns: 1fr 1fr !important; gap: 8px !important; padding: 12px 16px 16px !important; }
    .putdc-example-item, .putml-example-item { padding: 10px 12px !important; border: 1px solid #ddd !important; background: #f9fafb !important; }
    .putdc-example-badge, .putml-example-badge { background: #e5e7eb !important; color: #333 !important; font-size: 0.65rem !important; padding: 1px 8px !important; }
    .putdc-example-body, .putml-example-body { font-size: 0.78rem !important; color: #444 !important; }

    .putdc-calc-card, .putdc-result-card, .putdc-edu-card, .putdc-examples-card,
    .putml-calc-card, .putml-result-card, .putml-edu-card, .putml-examples-card,
    .putmw-calc-card, .putmw-result-card, .putmw-edu-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* ============================================================
   Responsive - Unified Breakpoints: 768px / 480px
   ============================================================ */

/* --- Mobile (<=768px) --- */
@media (max-width: 768px) {
    .putdc-form-grid,
    .putml-form-grid {
        grid-template-columns: 1fr;
    }

    .putdc-details-row,
    .putml-details-row,
    .putmw-details-row {
        grid-template-columns: 1fr;
    }

    .putdc-breakdown-card,
    .putml-breakdown-card,
    .putmw-breakdown-card {
        border-right: none;
        border-bottom: 1px solid #e5e7eb;
    }

    .putdc-ref-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* --- Small Mobile (<=480px) --- */
@media (max-width: 480px) {
    .putdc-section .pute-container,
    .putml-section .pute-container,
    .putmw-section .pute-container {
        padding: 0 16px 40px;
    }

    .putdc-card-header,
    .putml-card-header,
    .putmw-card-header {
        padding: 16px 20px;
    }

    .putdc-form,
    .putml-form,
    .putmw-form {
        padding: 20px;
    }

    .putdc-result-banner,
    .putml-result-banner,
    .putmw-result-banner {
        padding: 24px 20px;
    }

    .putdc-result-number,
    .putml-result-number,
    .putmw-result-number {
        font-size: 2rem;
    }

    .putdc-result-actions,
    .putml-result-actions,
    .putmw-result-actions {
        padding: 12px 20px;
    }

    .putdc-detail-card-header,
    .putml-detail-card-header,
    .putmw-detail-card-header {
        padding: 12px 20px;
    }

    .putdc-detail-line,
    .putml-detail-line,
    .putmw-detail-line {
        padding: 10px 20px;
    }

    .putdc-detail-val,
    .putml-detail-val,
    .putmw-detail-val {
        max-width: 50%;
    }

    .putdc-examples-grid,
    .putml-examples-grid {
        grid-template-columns: 1fr;
        padding: 16px 20px 20px;
    }

    .putdc-edu-body,
    .putml-edu-body,
    .putmw-edu-body {
        padding: 16px 20px 20px;
    }

    .putdc-disclaimer,
    .putml-disclaimer,
    .putmw-disclaimer {
        padding: 12px 20px;
    }

    .putdc-ref-grid {
        grid-template-columns: 1fr;
    }

    .putmw-quick-picks {
        gap: 4px;
    }
}