:root{--bg: #0f1115;--surface: #171a21;--surface-2: #1f232c;--border: #2a2f3a;--text: #e8eaed;--text-muted: #9aa1ac;--accent: #ff5b2e;--accent-hover: #ff7a52;--success: #3ecf8e;--radius: 14px;--max-width: 780px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.55}img,video,iframe{max-width:100%}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--accent-hover);outline-offset:3px}.skip-link{position:absolute;top:8px;left:8px;z-index:1000;padding:10px 14px;transform:translateY(-160%);background:var(--surface);color:var(--text);border:2px solid var(--accent);border-radius:8px}.skip-link:focus{transform:translateY(0)}.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}.site-header{border-bottom:1px solid var(--border);padding:16px 0;position:sticky;top:0;background:#0f1115eb;backdrop-filter:blur(8px);z-index:50}.site-header .container{display:flex;align-items:center;justify-content:space-between}.logo{font-weight:700;font-size:1.15rem;color:var(--text)}.logo span{color:var(--accent)}.site-footer{border-top:1px solid var(--border);padding:24px 0;text-align:center;color:var(--text-muted);font-size:.82rem;margin-top:48px}.site-footer a{color:var(--text-muted);margin:0 8px}.breadcrumbs{padding:16px 0 0;font-size:.78rem;color:var(--text-muted)}.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;list-style:none;margin:0;padding:0}.breadcrumbs li{display:inline-flex;align-items:center;min-width:0}.breadcrumbs li:not(:last-child):after{content:"›";margin-left:6px;color:var(--text-muted)}.breadcrumbs a{color:var(--text-muted)}.breadcrumbs a:hover{color:var(--accent)}.breadcrumbs [aria-current=page]{color:var(--text);overflow-wrap:anywhere}.hero{padding:28px 0 24px;text-align:center}.hero h1{font-size:1.8rem;margin:0 0 8px}.hero p{color:var(--text-muted);margin:0}.calc-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin:24px 0}.field{margin-bottom:16px}.field label,.field-label{display:block;font-size:.85rem;color:var(--text-muted);margin-bottom:6px}.field input,.field select,.field textarea{width:100%;padding:12px 14px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:1rem}.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}.unit-toggle{display:flex;gap:8px;flex-wrap:wrap}.unit-toggle button{flex:1;min-width:70px;min-height:44px;padding:10px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;color:var(--text-muted);cursor:pointer}.unit-toggle button.active{border-color:var(--accent);color:var(--text);background:#ff5b2e1f}.btn-primary{width:100%;min-height:44px;padding:14px;background:var(--accent);color:#fff;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;margin-top:8px}.btn-primary:hover{background:var(--accent-hover)}.result-box{margin-top:20px;padding:20px;background:var(--surface-2);border-radius:12px;text-align:center;display:none}.result-box.show{display:block}.result-box[hidden]{display:none!important}.result-box .big-number{font-size:clamp(1.8rem,7vw,2.4rem);font-weight:700;color:var(--success);overflow-wrap:anywhere}.result-box .label{color:var(--text-muted);font-size:.85rem;margin-top:4px}.result-table{width:100%;margin-top:16px;border-collapse:collapse;font-size:.88rem}.result-table td{padding:8px 6px;border-bottom:1px solid var(--border)}.result-table caption{text-align:left;color:var(--text-muted);padding:0 0 8px}.result-table td:last-child{text-align:right;font-weight:600}.article-section{margin:32px 0}.article-section h2{font-size:1.2rem;margin-bottom:10px}.article-section p{color:#c7cbd2;font-size:.95rem}.faq-item{border-bottom:1px solid var(--border);padding:14px 0}.faq-item h3{font-size:.98rem;margin:0 0 6px}.faq-item p{color:var(--text-muted);font-size:.9rem;margin:0}.article-section ul{color:#c7cbd2;font-size:.95rem;padding-left:20px;margin:12px 0}.article-section li{margin-bottom:8px}.article-section h3{font-size:1.05rem;margin:20px 0 8px;color:var(--text)}.article-section code{background:var(--surface-2);padding:2px 6px;border-radius:4px;font-size:.88rem;color:var(--accent)}.result-table thead th{text-align:left;font-size:.8rem;color:var(--text-muted);padding:6px;border-bottom:1px solid var(--border)}.result-table thead th:last-child{text-align:right}.tool-card .icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;margin:0 auto 10px;background:var(--surface-2);border:1px solid var(--accent);border-radius:12px;font-size:.95rem!important;font-weight:800;letter-spacing:0;color:var(--accent);box-shadow:0 2px 6px #00000040}.result-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.result-actions .btn-primary{flex:1;text-decoration:none;text-align:center;font-size:.85rem}.result-range{font-size:.85rem;color:var(--text-muted);margin-top:4px}.error-message{color:#ffb4a8;font-size:.9rem;margin-top:8px}@media (max-width: 480px){.container{padding-left:16px;padding-right:16px}.calc-card{padding:18px}.result-box{padding:16px}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}