/* ============================================================
   BTU Calculator - Orange Gradient Theme
   ============================================================ */

.putbtu-section .pute-container { max-width: 960px; margin: 0 auto; padding: 50px 24px; }
.putbtu-calc-card { background: var(--st-white); border: 2px solid #ffe0cc; border-radius: var(--st-radius-lg); overflow: hidden; box-shadow: var(--st-shadow-md); }
.putbtu-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; }
.putbtu-card-header .dashicons { font-size: 1.5rem; width: 28px; height: 28px; line-height: 1; color: var(--st-primary); }
.putbtu-card-header h3 { margin: 0; font-size: 1.15rem; font-weight: 800; color: var(--st-secondary); }
.putbtu-form { padding: 28px; }
.putbtu-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; align-items: start; }
.putbtu-field label { display: block; font-size: 0.8rem; font-weight: 700; color: var(--st-secondary); margin-bottom: 5px; }
.putbtu-input-wrap { position: relative; }
.putbtu-section .putbtu-input-wrap input,
.putbtu-section .putbtu-input-wrap select { width: 100%; padding: 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; }
.putbtu-section .putbtu-input-wrap input:focus,
.putbtu-section .putbtu-input-wrap select:focus { border-color: var(--st-primary); box-shadow: 0 0 0 3px rgba(255, 77, 0, 0.08); }
.putbtu-btn-group { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 16px; padding-bottom: 24px; }
.putbtu-unit-label { font-weight: 400; color: #9ca3af; }
.putbtu-full-field { grid-column: 1 / -1; }

/* ── Four-Stat Grid ──────────────────────────────────────────── */
.putbtu-four-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.putbtu-stat-box { padding: 16px; background: #fff7ed; border: 2px solid #fed7aa; border-radius: var(--st-radius); text-align: center; }
.putbtu-stat-box:nth-child(1) { border-color: #fdba74; }
.putbtu-stat-box:nth-child(2) { border-color: #fb923c; }
.putbtu-stat-box:nth-child(3) { border-color: #f97316; }
.putbtu-stat-box:nth-child(4) { border-color: #ea580c; }
.putbtu-stat-label { display: block; font-size: 0.75rem; font-weight: 700; color: #6b7280; text-transform: uppercase; letter-spacing: 0.4px; margin-bottom: 4px; }
.putbtu-stat-value { font-size: 1.3rem; font-weight: 800; color: #ea580c; word-break: break-word; }

/* ── Result Card ─────────────────────────────────────────────── */
.putbtu-result-card { margin-top: 28px; background: var(--st-white); border: 2px solid #fed7aa; border-radius: var(--st-radius-lg); overflow: hidden; box-shadow: var(--st-shadow-md); }
.putbtu-result-banner { padding: 32px 28px; text-align: center; background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 50%, #fff7ed 100%); border-bottom: 1px solid #fed7aa; }
.putbtu-result-equation { font-size: 0.95rem; font-weight: 600; color: #6b7280; margin-bottom: 8px; }
.putbtu-result-number { font-size: 2.8rem; font-weight: 800; color: #ea580c; line-height: 1.1; word-break: break-word; }

/* ── Action Buttons ──────────────────────────────────────────── */
.putbtu-result-actions { display: flex; gap: 10px; padding: 14px 28px; border-bottom: 1px solid #e5e7eb; justify-content: center; flex-wrap: wrap; }
.putbtu-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); }
.putbtu-action-btn:hover { border-color: var(--st-primary); color: var(--st-primary); background: #fff8f0; }
.putbtu-action-btn .dashicons { font-size: 16px; width: 16px; height: 16px; line-height: 1; }

/* ── Details Row (Breakdown + Steps) ──────────────────────────── */
.putbtu-details-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.putbtu-detail-card { padding: 0; }
.putbtu-breakdown-card { border-right: 1px solid #e5e7eb; }
.putbtu-detail-card-header { display: flex; align-items: center; gap: 8px; padding: 14px 24px; background: #f9fafb; border-bottom: 1px solid #e5e7eb; }
.putbtu-detail-card-header .dashicons { font-size: 18px; width: 18px; height: 18px; line-height: 1; color: var(--st-primary); }
.putbtu-detail-card-header h4 { margin: 0; font-size: 0.82rem; font-weight: 700; color: var(--st-secondary); text-transform: uppercase; letter-spacing: 0.4px; }
.putbtu-detail-card-body { padding: 4px 0; }
.putbtu-detail-line { display: flex; justify-content: space-between; align-items: center; padding: 10px 24px; border-bottom: 1px solid #f3f4f6; }
.putbtu-detail-line:last-child { border-bottom: none; }
.putbtu-detail-key { font-size: 0.85rem; font-weight: 600; color: #6b7280; }
.putbtu-detail-val { font-size: 0.85rem; font-weight: 600; color: var(--st-text); text-align: right; word-break: break-word; max-width: 55%; }
.putbtu-detail-line-answer { background: #fff7ed; }
.putbtu-detail-line-answer .putbtu-detail-val { color: #ea580c; font-weight: 800; }

/* ── Educational Card ────────────────────────────────────────── */
.putbtu-edu-card { border-top: 1px solid #e5e7eb; }
.putbtu-edu-body { padding: 20px 24px 24px; }
.putbtu-edu-body > p { margin: 0 0 18px; font-size: 0.9rem; color: #6b7280; line-height: 1.65; }
.putbtu-edu-formula-box { background: #f9fafb; border: 1px solid #e5e7eb; border-radius: var(--st-radius); overflow: hidden; }
.putbtu-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; }
.putbtu-edu-formula-row { display: flex; align-items: center; gap: 14px; padding: 11px 16px; border-bottom: 1px solid #f3f4f6; }
.putbtu-edu-formula-row:last-child { border-bottom: none; }
.putbtu-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; }
.putbtu-edu-formula-eq { font-size: 0.88rem; font-weight: 600; color: var(--st-text); }

/* ── Examples Card ───────────────────────────────────────────── */
.putbtu-examples-card { border-top: 1px solid #e5e7eb; }
.putbtu-examples-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 20px 24px 24px; }
.putbtu-example-item { padding: 16px; background: #fff8f0; border: 1px solid #ffe0cc; border-radius: var(--st-radius); }
.putbtu-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; }
.putbtu-example-body { font-size: 0.85rem; color: #6b7280; line-height: 1.55; }
.putbtu-example-body strong { color: var(--st-text); }

/* ── Disclaimer ──────────────────────────────────────────────── */
.putbtu-disclaimer { display: flex; align-items: flex-start; gap: 10px; padding: 14px 24px; background: #fffbeb; border-top: 1px solid #fde68a; }
.putbtu-disclaimer .dashicons { color: #d97706; font-size: 20px; width: 20px; height: 20px; line-height: 1; flex-shrink: 0; margin-top: 2px; }
.putbtu-disclaimer p { margin: 0; font-size: 0.84rem; color: #92400e; line-height: 1.5; }

/* ============================================================
   Custom Warning Modal
   ============================================================ */
.putbtu-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; }
.putbtu-modal-overlay.putbtu-modal-show { opacity: 1; }
.putbtu-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; }
.putbtu-modal-overlay.putbtu-modal-show .putbtu-modal-card { transform: scale(1); }
.putbtu-modal-header { display: flex; align-items: center; gap: 10px; padding: 16px 20px; background: linear-gradient(135deg, #fff4ef, #fff8f0); border-bottom: 2px solid #ffe0cc; }
.putbtu-modal-header .dashicons-warning { color: #d97706; font-size: 24px; width: 24px; height: 24px; line-height: 1; flex-shrink: 0; }
.putbtu-modal-header h4 { margin: 0; flex: 1; font-size: 1.05rem; font-weight: 700; color: var(--st-secondary); }
.putbtu-modal-close { background: none; border: none; cursor: pointer; padding: 4px; color: var(--st-text); line-height: 1; transition: color var(--st-transition); }
.putbtu-modal-close:hover { color: #dc2626; }
.putbtu-modal-close .dashicons { font-size: 22px; width: 22px; height: 22px; line-height: 1; }
.putbtu-modal-body { padding: 24px 20px; }
.putbtu-modal-body p { margin: 0; font-size: 0.95rem; color: var(--st-text); line-height: 1.6; }

/* ============================================================
   Print / PDF
   ============================================================ */
@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; }
    .putbtu-btn-group,
    .putbtu-result-actions,
    .putbtu-disclaimer,
    .putbtu-modal-overlay,
    .pute-single-hero,
    .pute-single-sidebar,
    .putbtu-section .pute-single-breadcrumbs,
    .putbtu-section .more-tools,
    .putbtu-section ~ section { display: none !important; }
    .putbtu-section { padding: 0 !important; background: #fff !important; }
    .putbtu-section .pute-container { max-width: 100% !important; padding: 0 !important; margin: 0 !important; }
    .putbtu-calc-card,
    .putbtu-result-card { border: 1.5px solid #ddd !important; box-shadow: none !important; border-radius: 6px !important; break-inside: avoid; page-break-inside: avoid; }
    .putbtu-card-header { padding: 12px 16px !important; background: #f9fafb !important; border-bottom: 1.5px solid #ddd !important; }
    .putbtu-card-header h3 { font-size: 1rem !important; color: #111 !important; }
    .putbtu-card-header .dashicons { color: #333 !important; }
    .putbtu-form { padding: 16px !important; }
    .putbtu-form-grid { grid-template-columns: 1fr 1fr !important; gap: 10px !important; }
    .putbtu-section .putbtu-input-wrap input,
    .putbtu-section .putbtu-input-wrap select { border: 1px solid #ccc !important; padding: 8px 10px !important; font-size: 0.9rem !important; }
    .putbtu-result-banner { padding: 20px 16px !important; background: #f9fafb !important; border-bottom: 1.5px solid #ddd !important; }
    .putbtu-result-number { font-size: 2rem !important; color: #111 !important; }
    .putbtu-result-equation { font-size: 0.9rem !important; color: #333 !important; }
    .putbtu-details-row { grid-template-columns: 1fr 1fr !important; border-bottom: 1px solid #ddd !important; }
    .putbtu-breakdown-card { border-right: 1px solid #ddd !important; }
    .putbtu-detail-card-header { background: #f3f4f6 !important; padding: 8px 16px !important; border-bottom: 1px solid #ddd !important; }
    .putbtu-detail-card-header h4 { font-size: 0.72rem !important; color: #333 !important; }
    .putbtu-detail-line { padding: 7px 16px !important; border-bottom: 1px solid #eee !important; }
    .putbtu-detail-key { font-size: 0.78rem !important; color: #555 !important; }
    .putbtu-detail-val { font-size: 0.78rem !important; color: #111 !important; }
    .putbtu-detail-line-answer { background: #f9fafb !important; }
    .putbtu-edu-card { border-top: 1px solid #ddd !important; break-inside: avoid; page-break-inside: avoid; }
    .putbtu-edu-body { padding: 12px 16px 16px !important; }
    .putbtu-edu-body > p { font-size: 0.82rem !important; color: #444 !important; }
    .putbtu-edu-formula-box { border: 1px solid #ddd !important; background: #f9fafb !important; }
    .putbtu-edu-formula-title { background: #eee !important; font-size: 0.7rem !important; padding: 7px 12px !important; }
    .putbtu-edu-formula-row { padding: 7px 12px !important; border-bottom: 1px solid #eee !important; }
    .putbtu-edu-formula-tag { background: #f3f4f6 !important; border: 1px solid #ddd !important; font-size: 0.68rem !important; color: #333 !important; }
    .putbtu-edu-formula-eq { font-size: 0.8rem !important; color: #111 !important; }
    .putbtu-examples-card { border-top: 1px solid #ddd !important; break-inside: avoid; page-break-inside: avoid; }
    .putbtu-examples-grid { grid-template-columns: 1fr 1fr !important; gap: 8px !important; padding: 12px 16px 16px !important; }
    .putbtu-example-item { padding: 10px 12px !important; border: 1px solid #ddd !important; background: #f9fafb !important; }
    .putbtu-example-badge { background: #e5e7eb !important; color: #333 !important; font-size: 0.65rem !important; padding: 1px 8px !important; }
    .putbtu-example-body { font-size: 0.78rem !important; color: #444 !important; }
}

/* ============================================================
   Responsive - 768px / 480px
   ============================================================ */
@media (max-width: 768px) {
    .putbtu-form-grid { grid-template-columns: 1fr; }
    .putbtu-four-grid { grid-template-columns: 1fr 1fr; }
    .putbtu-details-row { grid-template-columns: 1fr; }
    .putbtu-breakdown-card { border-right: none; border-bottom: 1px solid #e5e7eb; }
}

@media (max-width: 480px) {
    .putbtu-section .pute-container { padding: 40px 16px; }
    .putbtu-card-header { padding: 16px 20px; }
    .putbtu-form { padding: 20px; }
    .putbtu-four-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .putbtu-result-banner { padding: 24px 20px; }
    .putbtu-result-number { font-size: 2rem; }
    .putbtu-detail-line { padding: 10px 20px; }
    .putbtu-detail-val { max-width: 50%; }
    .putbtu-examples-grid { grid-template-columns: 1fr; }
    .putbtu-edu-body, .putbtu-disclaimer { padding: 16px 20px; }
}