@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#0f0f13;--card:#1a1a2e;--border:rgba(255,255,255,.08);--text:#e4e4e7;--text-muted:#a1a1aa;--accent-1:#10b981;--accent-2:#059669;--accent-3:#047857;--gradient:linear-gradient(135deg,var(--accent-1),var(--accent-2),var(--accent-3));--radius:0.75rem;--font:'Inter',sans-serif;--mono:'JetBrains Mono',monospace}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6;min-height:100vh}
a{color:var(--accent-1);text-decoration:none}
a:hover{text-decoration:underline}
.hidden{display:none!important}
.container{max-width:900px;margin:0 auto;padding:0 1.25rem}

/* Header */
.site-header{border-bottom:1px solid var(--border);padding:.875rem 0}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.1rem;color:var(--text);text-decoration:none}
.logo-icon{width:2rem;height:2rem;display:flex;align-items:center;justify-content:center;background:var(--gradient);border-radius:.5rem;font-weight:800;font-size:.95rem;color:#fff}
nav{display:flex;gap:1.25rem}
nav a{color:var(--text-muted);font-size:.875rem;font-weight:500}
nav a:hover{color:var(--text)}

/* Hero */
.hero{text-align:center;padding:3rem 0 1.5rem}
.hero h1{font-size:2.25rem;font-weight:800;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.75rem}
.hero p{color:var(--text-muted);font-size:1.05rem;max-width:600px;margin:0 auto}

/* Ad Slots */
.ad-slot{background:var(--card);border:1px dashed var(--border);border-radius:var(--radius);min-height:90px;max-width:728px;margin:1.5rem auto;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:.8rem}

/* Card */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.5rem}

/* Form */
.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.input-group{display:flex;flex-direction:column;gap:.35rem}
.input-group label{font-size:.85rem;font-weight:600;color:var(--text-muted)}
.input-group input,.input-group select{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:.7rem .9rem;color:var(--text);font-family:var(--font);font-size:.95rem;outline:none;transition:border-color .2s}
.input-group input:focus,.input-group select:focus{border-color:var(--accent-1)}
.input-group select option{background:var(--bg);color:var(--text)}
.input-group.full-width{grid-column:1/-1}

.btn-calculate{display:block;width:100%;margin-top:1.25rem;padding:.8rem;background:var(--gradient);color:#fff;border:none;border-radius:var(--radius);font-family:var(--font);font-size:1rem;font-weight:700;cursor:pointer;transition:opacity .2s}
.btn-calculate:hover{opacity:.9}

/* Results */
.results-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-top:1.5rem}
.result-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:1.1rem;text-align:center}
.result-card .label{font-size:.8rem;color:var(--text-muted);font-weight:500;margin-bottom:.35rem}
.result-card .value{font-size:1.4rem;font-weight:800;font-family:var(--mono);background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* Table */
.table-wrap{overflow-x:auto;margin-top:1.5rem}
.breakdown-table{width:100%;border-collapse:collapse;font-size:.85rem}
.breakdown-table th{background:var(--accent-3);color:#fff;padding:.65rem .75rem;text-align:right;font-weight:600}
.breakdown-table th:first-child{text-align:center;border-radius:var(--radius) 0 0 0}
.breakdown-table th:last-child{border-radius:0 var(--radius) 0 0}
.breakdown-table td{padding:.6rem .75rem;text-align:right;border-bottom:1px solid var(--border);font-family:var(--mono);font-size:.82rem}
.breakdown-table td:first-child{text-align:center;font-family:var(--font);font-weight:600}
.breakdown-table tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.breakdown-table tbody tr:hover{background:rgba(16,185,129,.06)}

/* SEO Content */
.content-section{margin-top:2rem}
.content-section h2{font-size:1.35rem;font-weight:700;margin-bottom:.75rem;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.content-section h3{font-size:1.05rem;font-weight:600;margin:1.25rem 0 .5rem;color:var(--text)}
.content-section p,.content-section li{color:var(--text-muted);font-size:.92rem;margin-bottom:.5rem}
.content-section ul{list-style:disc;padding-left:1.25rem}
.content-section code{background:rgba(16,185,129,.1);padding:.15rem .4rem;border-radius:.25rem;font-family:var(--mono);font-size:.82rem;color:var(--accent-1)}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border);padding:1rem 0}
.faq-q{font-weight:600;font-size:.95rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:"+";font-size:1.2rem;color:var(--accent-1);transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--text-muted);font-size:.9rem}
.faq-item.open .faq-a{max-height:600px;padding-top:.75rem}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:1.5rem 0;margin-top:3rem}
.site-footer .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.site-footer p{color:var(--text-muted);font-size:.8rem}
.site-footer nav{display:flex;gap:1rem}
.site-footer nav a{color:var(--text-muted);font-size:.8rem}

@media(max-width:640px){
nav{display:none}
.hero h1{font-size:1.6rem}
.input-grid{grid-template-columns:1fr}
.results-grid{grid-template-columns:1fr}
.breakdown-table{font-size:.75rem}
.breakdown-table th,.breakdown-table td{padding:.45rem .4rem}
.site-footer .container{flex-direction:column;text-align:center}
}