*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-deep: #0d1b2a;--bg-mid: #152235;--bg-nav: #0f1e30;--card-bg: #ffffff;--card-alt: #f8fafc;--primary: #2563eb;--primary-hover: #1d4ed8;--primary-light: #eff6ff;--accent: #10b981;--accent-light: #ecfdf5;--warning: #f59e0b;--warning-light: #fffbeb;--danger: #ef4444;--danger-light: #fef2f2;--info: #3b82f6;--info-light: #eff6ff;--on-dark: #e2e8f0;--on-dark-muted: #94a3b8;--text: #111827;--text-mid: #374151;--text-light: #6b7280;--border: #e5e7eb;--border-dark: #1e3450;--shadow-sm: 0 1px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 16px rgba(0, 0, 0, .12);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .18);--radius-sm: 6px;--radius-md: 12px;--radius-lg: 18px;--transition: .18s ease}html[lang=ar] body,html[lang=ar] input,html[lang=ar] select,html[lang=ar] button{font-family:IBM Plex Sans Arabic,IBM Plex Sans,system-ui,sans-serif}html[lang=en] body,html[lang=en] input,html[lang=en] select,html[lang=en] button{font-family:IBM Plex 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svg{width:18px;height:18px;color:var(--primary)}.card-title{font-size:.95rem;font-weight:600;color:var(--text)}.card-body{padding:20px 22px}.unit-toggle-row{display:flex;align-items:center;gap:8px;margin-bottom:18px}.unit-toggle-label{font-size:.8rem;font-weight:500;color:var(--text-light);margin-inline-end:4px}.unit-pill{display:flex;background:var(--card-alt);border:1px solid var(--border);border-radius:99px;overflow:hidden}.unit-pill button{padding:5px 16px;font-size:.82rem;font-weight:500;border:none;background:transparent;color:var(--text-light);transition:background var(--transition),color var(--transition)}.unit-pill button.active{background:var(--primary);color:#fff;border-radius:99px}.inputs-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}@media (min-width: 600px){.inputs-grid{grid-template-columns:repeat(4,1fr)}}.input-group{display:flex;flex-direction:column;gap:5px}.input-group.height-imperial{grid-column:span 2}@media (min-width: 600px){.input-group.height-imperial{grid-column:span 1}}.input-label{font-size:.78rem;font-weight:600;color:var(--text-light);text-transform:uppercase;letter-spacing:.04em}.input-wrap{position:relative;display:flex;align-items:center}.input-wrap input,.input-wrap select{width:100%;padding:9px 38px 9px 12px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:.95rem;font-weight:500;color:var(--text);background:var(--card-bg);transition:border-color var(--transition),box-shadow var(--transition);-moz-appearance:none;appearance:none;-webkit-appearance:none}html[dir=rtl] .input-wrap input,html[dir=rtl] .input-wrap select{padding:9px 12px 9px 38px}.input-wrap input:focus,.input-wrap select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.input-unit{position:absolute;inset-inline-end:10px;font-size:.75rem;font-weight:600;color:var(--text-light);pointer-events:none}.height-imperial-inputs{display:grid;grid-template-columns:1fr 1fr;gap:6px}.input-wrap select{padding-inline-end:32px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;cursor:pointer}html[dir=rtl] .input-wrap select{background-position:left 10px center}.tabs{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:auto auto;background:var(--bg-mid);border-radius:var(--radius-md);padding:4px;gap:2px}.tabs .tab-btn:nth-child(4),.tabs .tab-btn:nth-child(5){grid-row:2}.tabs .tab-btn:nth-child(4){grid-column:1 / 2}.tabs .tab-btn:nth-child(5){grid-column:2 / 3}@media (min-width: 520px){.tabs{grid-template-columns:repeat(5,1fr);grid-template-rows:auto}.tabs .tab-btn:nth-child(4),.tabs .tab-btn:nth-child(5){grid-row:1}.tabs .tab-btn:nth-child(4){grid-column:auto}.tabs 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#fff;box-shadow:0 1px 4px #00000040;transition:inset-inline-start .4s ease}html[dir=rtl] .bmi-marker{transform:translate(50%,-50%)}.bmi-scale-labels{display:flex;justify-content:space-between;margin-top:6px}.bmi-scale-labels span{font-size:.7rem;color:var(--text-light)}.bmi-table{width:100%;border-collapse:collapse;margin-top:16px;font-size:.83rem}.bmi-table tr+tr td{border-top:1px solid var(--border)}.bmi-table td{padding:7px 10px;color:var(--text-mid)}.bmi-table td:first-child{font-weight:500}.bmi-table 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#2563eb4d}.ai-btn-wrap{display:flex;justify-content:center}.ai-btn{display:inline-flex;align-items:center;gap:8px;padding:11px 28px;background:#0d9488;color:#fff;border:none;border-radius:var(--radius-md);font-size:.9rem;font-weight:600;box-shadow:0 2px 10px #0d948859;transition:background var(--transition),box-shadow var(--transition),transform var(--transition)}.ai-btn:hover{background:#0f766e;box-shadow:0 4px 16px #0d948873;transform:translateY(-1px)}.ai-btn:active{transform:translateY(0);box-shadow:0 2px 8px #0d94884d}.ai-btn-lines{display:flex;flex-direction:column;align-items:center;gap:2px}.ai-btn-lines span:last-child{font-size:.75rem;font-weight:500;opacity:.85}.seo-section{padding:0 16px 32px;background:var(--bg-deep)}.seo-card{max-width:860px;margin:0 auto;background:var(--card-bg);border-radius:var(--radius-md);padding:24px 28px;border:1px solid var(--border)}.seo-title{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:10px}.seo-body{font-size:.85rem;color:var(--text-light);line-height:1.75;max-width:72ch}.calc-info-para{margin-top:14px;padding:12px 16px;background:var(--card-alt);border-radius:var(--radius-sm);border-inline-start:3px solid var(--border);font-size:.82rem;color:var(--text-light);line-height:1.6}.footer{background:var(--bg-nav);border-top:1px solid var(--border-dark);text-align:center;padding:20px 16px 16px;font-size:.75rem;color:var(--on-dark-muted)}.footer-links{display:flex;justify-content:center;gap:20px;flex-wrap:wrap;margin-bottom:10px}.footer-links a{color:var(--on-dark-muted);text-decoration:none;font-size:.78rem;transition:color var(--transition)}.footer-links a:hover{color:var(--on-dark);text-decoration:underline}.footer-copyright{margin-top:6px;font-size:.72rem;opacity:.65}.legal-page{min-height:60vh;padding:40px 20px 60px;background:var(--bg-deep)}.legal-content{max-width:720px;margin:0 auto;background:var(--card-bg);border-radius:var(--radius-lg);padding:36px 40px;box-shadow:var(--shadow-md)}.legal-back{display:inline-block;font-size:.83rem;color:var(--primary);text-decoration:none;margin-bottom:24px;transition:color var(--transition)}.legal-back:hover{color:var(--primary-hover);text-decoration:underline}.legal-title{font-size:1.6rem;font-weight:700;color:var(--text);margin-bottom:28px;padding-bottom:16px;border-bottom:1px solid var(--border)}.legal-body{display:flex;flex-direction:column;gap:24px}.legal-section h2{font-size:.95rem;font-weight:700;color:var(--text);margin-bottom:8px;text-transform:uppercase;letter-spacing:.04em}html[dir=rtl] .legal-section h2{text-transform:none;letter-spacing:0}.legal-section p{font-size:.88rem;color:var(--text-mid);line-height:1.7}.legal-section a{color:var(--primary);text-decoration:none}.legal-section a:hover{text-decoration:underline}@media (max-width: 600px){.legal-content{padding:24px 20px}.legal-title{font-size:1.3rem}}