*{margin:0;padding:0;box-sizing:border-box}
:root{--p:#00d166;--pc:#ccf6e0;--bg:#f9f9ff;--surface:#fff;--text:#191c1e;--muted:#505f76;--border:#e0e3e5;--outline:#737688;--shadow:0 4px 24px rgba(0,209,102,0.08);--card:#fff;--navy:var(--text);--gold:var(--p);--green:var(--p);--green-light:var(--pc)}
[data-theme="dark"]{--p:#00d166;--pc:#064e3b;--bg:#0f172a;--surface:#1e293b;--text:#e2e8f0;--muted:#94a3b8;--border:#334155;--outline:#94a3b8;--shadow:0 4px 24px rgba(0,0,0,0.3);--card:#1e293b;--navy:var(--text);--gold:var(--p);--green:var(--p);--green-light:var(--pc)}
html{transition:background 0.3s,color 0.3s}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;transition:background 0.3s,color 0.3s;background-image:radial-gradient(at 0% 0%,rgba(0,209,102,0.08) 0,transparent 40%),radial-gradient(at 100% 0%,rgba(0,209,102,0.05) 0,transparent 40%);background-attachment:fixed}
[data-theme="dark"] body{background-image:radial-gradient(at 0% 0%,rgba(0,209,102,0.06) 0,transparent 40%),radial-gradient(at 100% 0%,rgba(0,209,102,0.03) 0,transparent 40%)}
a{color:var(--p);text-decoration:none}
a:hover{text-decoration:underline}

/* Header */
.site-header{position:fixed;top:0;width:100%;z-index:100;height:36px;background:rgba(255,255,255,0.8);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,0,0,0.06);transition:background 0.3s}
[data-theme="dark"] .site-header{background:rgba(15,23,42,0.85);border-color:rgba(255,255,255,0.06)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 24px;height:36px;display:flex;align-items:center;justify-content:space-between}
.site-title{font-size:15px;font-weight:700;color:var(--text);display:flex;align-items:center;gap:4px}
.site-title i{color:var(--p);font-size:14px}
.site-title span{color:var(--p)}
.back-link{color:var(--muted);font-size:12px}
.back-link:hover{color:var(--p)}

/* Dark mode toggle */
.dark-toggle{background:transparent;border:none;color:var(--muted);width:26px;height:26px;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:13px;transition:all 0.2s;flex-shrink:0;margin-left:8px}
.dark-toggle:hover{color:var(--p);background:var(--pc)}

/* Layout - add padding-top to account for fixed header */
.container{max-width:1280px;margin:0 auto;padding:54px 24px 24px}
.page-title{text-align:center;margin:40px 0 48px}
.page-title h1{font-size:36px;font-weight:800;color:var(--text);margin-bottom:8px}
.page-title p{color:var(--muted);font-size:16px;max-width:640px;margin:0 auto}

/* Calculator grid */
.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}
.calc-card{background:rgba(255,255,255,0.7);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.5);box-shadow:0 4px 20px rgba(0,209,102,0.05);border-radius:10px;padding:16px 18px;transition:all 0.2s;display:flex;align-items:center;gap:14px}
[data-theme="dark"] .calc-card{background:rgba(30,41,59,0.7);border-color:rgba(255,255,255,0.08)}
.calc-card:hover{box-shadow:var(--shadow);border-color:rgba(0,209,102,0.3);transform:translateY(-2px)}
.calc-card .icon{width:40px;height:40px;border-radius:8px;background:var(--pc);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;color:var(--p)}
.calc-card .info{flex:1;min-width:0}
.calc-card .name{font-weight:600;font-size:14px;color:var(--text)}
.calc-card .desc{font-size:12px;color:var(--muted);margin-top:2px}
.cat-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--p);margin:40px 0 16px;padding-bottom:8px;border-bottom:2px solid var(--pc)}

/* Calculator page */
.calc-wrapper{max-width:720px;margin:40px auto}
.calc-card-form{background:rgba(255,255,255,0.7);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,0.5);box-shadow:0 4px 20px rgba(0,209,102,0.05);border-radius:16px;padding:32px;transition:background 0.3s}
[data-theme="dark"] .calc-card-form{background:rgba(30,41,59,0.7);border-color:rgba(255,255,255,0.08)}
.calc-card-form h2{font-size:24px;font-weight:700;margin-bottom:4px}
.calc-card-form .sub{color:var(--muted);font-size:14px;margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.form-row.full{grid-template-columns:1fr}
.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:4px;color:var(--text)}
.form-group input,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;transition:border 0.2s,background 0.3s,color 0.3s;background:var(--surface);color:var(--text)}
[data-theme="dark"] .form-group input,[data-theme="dark"] .form-group select{background:#0f172a;color:#e2e8f0}
.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--p);box-shadow:0 0 0 3px rgba(0,209,102,0.1)}
.form-group .prefix{position:relative}
.form-group .prefix input{padding-left:28px}
.form-group .prefix .pre{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:14px;font-weight:500}
.btn{background:var(--p);color:#fff;border:none;padding:12px 32px;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;transition:all 0.2s;width:100%;font-family:inherit}
.btn:hover{background:#00b85c;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.results{margin-top:24px;padding:20px;border-radius:12px;background:rgba(255,255,255,0.5);border:1px solid var(--border);display:none}
[data-theme="dark"] .results{background:rgba(30,41,59,0.5)}
.results.show{display:block}
.result-item{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border)}
.result-item:last-child{border-bottom:none}
.result-item .label{font-size:14px;color:var(--muted)}
.result-item .value{font-size:16px;font-weight:700;color:var(--text)}
.result-item .value.green{color:var(--p)}
.result-highlight{background:var(--pc);border-radius:12px;padding:20px;text-align:center;margin-bottom:16px}
.result-highlight .amount{font-size:36px;font-weight:800;color:var(--p)}
.result-highlight .label{font-size:14px;color:var(--muted);margin-top:4px}

/* SEO Content */
.seo-content{margin-top:48px;padding-top:32px;border-top:2px solid var(--border)}
.seo-content h2{font-size:22px;font-weight:700;color:var(--text);margin-bottom:16px}
.seo-content h3{font-size:17px;font-weight:600;color:var(--text);margin:24px 0 8px}
.seo-content h4{font-size:14px;font-weight:600;color:var(--text);margin:16px 0 4px}
.seo-content p{font-size:14px;color:var(--text);line-height:1.7;margin-bottom:12px}
.seo-content ul,.seo-content ol{margin:0 0 12px 20px;font-size:14px;color:var(--text);line-height:1.7}
.seo-content li{margin-bottom:4px}
.seo-content strong{color:var(--text)}
.seo-content .formula{background:var(--pc);padding:12px 16px;border-radius:8px;font-family:'Courier New',monospace;font-size:13px;margin:8px 0 16px;overflow-x:auto;white-space:nowrap}
.faq-item{border:1px solid var(--border);border-radius:8px;padding:16px;margin-bottom:12px}
.faq-item h4{cursor:pointer;margin:0;font-size:14px;display:flex;align-items:center;gap:8px}
.faq-item h4::before{content:'\f059';font-family:'Font Awesome 6 Free';font-weight:900;color:var(--p);font-size:14px}
.faq-item p{margin:8px 0 0;font-size:13px;color:var(--muted);line-height:1.6}

/* Related Calculators */
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin-top:12px}
.related-card{background:rgba(255,255,255,0.7);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,0.5);border-radius:8px;padding:12px 14px;display:flex;align-items:center;gap:10px;transition:all 0.2s}
[data-theme="dark"] .related-card{background:rgba(30,41,59,0.7);border-color:rgba(255,255,255,0.08)}
.related-card:hover{box-shadow:var(--shadow);border-color:rgba(0,209,102,0.3);transform:translateY(-1px);text-decoration:none}
.related-card .icon{width:32px;height:32px;border-radius:6px;background:var(--pc);display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0;color:var(--p)}
.related-card .name{font-size:13px;font-weight:600;color:var(--text)}

/* Breadcrumb */
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--p)}

/* Back to top */
.back-to-top{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:50%;background:var(--p);color:#fff;border:none;font-size:18px;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,0.2);display:none;align-items:center;justify-content:center;z-index:999;transition:all 0.3s}
.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(0,0,0,0.3)}
[data-theme="dark"] .back-to-top{background:var(--p)}

/* Responsive tables */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:12px 0;border-radius:8px;border:1px solid var(--border)}
.table-wrap table{width:100%;border-collapse:collapse;font-size:13px;min-width:500px}
.table-wrap th,.table-wrap td{padding:8px 12px;text-align:right;border-bottom:1px solid var(--border);white-space:nowrap}
.table-wrap th{background:var(--bg);font-weight:600;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:0.5px;position:sticky;top:0}
.table-wrap td:first-child,.table-wrap th:first-child{text-align:left}
.table-wrap tr:last-child td{border-bottom:none}
.table-wrap tr:hover td{background:var(--bg)}

/* Copy & share buttons */
.btn-sm{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--border);border-radius:6px;background:var(--surface);color:var(--text);font-size:12px;font-weight:600;cursor:pointer;font-family:inherit;transition:all 0.2s}
.btn-sm:hover{background:var(--bg);border-color:var(--p);color:var(--p)}
.btn-sm i{font-size:13px}

/* History timeline */
.timeline{position:relative;padding-left:24px;margin:12px 0}
.timeline::before{content:'';position:absolute;left:8px;top:0;bottom:0;width:2px;background:var(--border)}
.timeline-item{position:relative;padding:8px 0 8px 16px;font-size:13px}
.timeline-item::before{content:'';position:absolute;left:-20px;top:14px;width:10px;height:10px;border-radius:50%;background:var(--p);border:2px solid var(--card)}
.timeline-item .time{font-size:11px;color:var(--muted)}
.timeline-item .val{font-weight:600;color:var(--text);margin-top:2px}

/* Language Switcher */
.lang-switcher{position:relative;display:inline-block}
.lang-current{background:none;border:none;font-size:16px;cursor:pointer;padding:2px 6px;border-radius:4px;line-height:1}
.lang-current:hover{background:var(--pc)}
.lang-dropdown{position:absolute;top:100%;right:0;background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 32px rgba(0,0,0,0.12);max-height:300px;overflow-y:auto;display:none;z-index:200;min-width:200px}
.lang-option{display:flex;align-items:center;gap:8px;padding:8px 12px;font-size:13px;color:var(--text);text-decoration:none;cursor:pointer}
.lang-option:hover{background:var(--pc)}
/* Mobile */
[data-theme="dark"] .search-wrap input{background:#0f172a;color:#e2e8f0;border-color:#334155}

/* Print / PDF styles */
@media print{*{background:transparent!important;box-shadow:none!important;text-shadow:none!important}body{background:#fff!important;color:#000!important;font-size:11pt}a{color:#000!important;text-decoration:underline}.site-header{display:none!important}.breadcrumb{display:none!important}.btn,.btn-sm,.dark-toggle,.related-grid,.seo-content,.search-wrap,.cat-grid,.category-section,.back-to-top,.copy-share-row,.scenario-compare,.calc-history{display:none!important}.calc-wrapper{max-width:100%;margin:0}.calc-card-form{box-shadow:none!important;border:1px solid #999!important;padding:12pt!important;border-radius:4pt}.results{display:block!important;border:1px solid #999!important;background:#fff!important;padding:8pt}.result-highlight .amount{color:#000!important;font-size:18pt}.table-wrap{border:1px solid #999;overflow:visible}.table-wrap table{min-width:auto;font-size:9pt}.table-wrap th,.table-wrap td{border-bottom:1px solid #ccc!important;color:#000!important}.amort-table-wrap{max-height:none!important;overflow:visible!important}canvas{display:none!important}.page-title{margin:20pt 0}.page-title h1{font-size:24pt;color:#000!important}.page-title p{color:#333!important}.container{padding:12pt!important}.comparison-card{border:1px solid #999!important;background:#fff!important;page-break-inside:avoid}.savings-badge{background:#eee!important;color:#000!important}form{page-break-inside:avoid}h2,h3,h4{page-break-after:avoid}.result-item{page-break-inside:avoid;padding:3pt 0}}

@media(max-width:640px){.form-row{grid-template-columns:1fr}.calc-grid{grid-template-columns:1fr}.calc-wrapper{margin:24px 16px}.calc-card-form{padding:20px}.page-title h1{font-size:28px}}