*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f1117;--surface:#171b26;--surface2:#1e2333;--border:#272d3f;
  --accent:#3b82f6;--green:#10b981;--yellow:#f59e0b;--red:#ef4444;
  --text:#e2e8f0;--muted:#94a3b8;--radius:10px;
}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,sans-serif;line-height:1.6}
.skip-link{position:absolute;top:-100px;left:0;background:var(--accent);color:#fff;padding:.5rem 1rem;z-index:9999;transition:top .2s;border-radius:0 0 8px 0}
.skip-link:focus{top:0}
.container{max-width:860px;margin:0 auto;padding:0 1.25rem}

/* HEADER */
header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.9rem 1.25rem;flex-wrap:wrap;gap:.5rem}
.logo{font-weight:800;font-size:1.15rem}
nav a{color:var(--muted);text-decoration:none;font-size:.88rem;margin-left:1rem;transition:color .2s}
nav a:hover{color:var(--accent)}

/* HERO */
.hero{background:linear-gradient(135deg,#1a1f35,#0f1117);padding:2.5rem 0 2rem;text-align:center;border-bottom:1px solid var(--border)}
.hero h1{font-size:clamp(1.7rem,4vw,2.5rem);font-weight:800;margin-bottom:.5rem}
.hero-sub{color:var(--muted);font-size:1rem;margin-bottom:1.25rem}
.badge-row{display:flex;justify-content:center;gap:.75rem;flex-wrap:wrap}
.badge{background:rgba(59,130,246,.1);border:1px solid rgba(59,130,246,.25);color:var(--accent);padding:.25rem .75rem;border-radius:999px;font-size:.82rem}

/* AD SLOTS */
.ad-slot{text-align:center;margin:1rem auto;max-width:728px}
.ad-placeholder{display:inline-block;background:var(--surface2);border:1px dashed var(--border);color:var(--muted);font-size:.72rem;padding:.4rem 2rem;border-radius:4px;letter-spacing:.5px;text-transform:uppercase}

/* FORM CARD */
.form-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;margin:2rem auto}
.form-card h2{font-size:1.3rem;margin-bottom:.3rem}
.form-desc{color:var(--muted);font-size:.9rem;margin-bottom:1.5rem}
.form-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem;margin-bottom:1.5rem}
.field{display:flex;flex-direction:column;gap:.35rem}
.field label{font-size:.85rem;color:var(--muted);font-weight:500}
.field select,.field input{background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:.6rem .85rem;border-radius:8px;font-size:.95rem;transition:border-color .2s;width:100%}
.field select:focus,.field input:focus{outline:none;border-color:var(--accent)}
.btn-calc{background:var(--accent);color:#fff;border:none;padding:.75rem 2.5rem;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s;width:100%;max-width:320px;display:block;margin:0 auto}
.btn-calc:hover{background:#2563eb}

/* RESULT */
.result-box{background:var(--surface2);border:2px solid var(--accent);border-radius:var(--radius);padding:1.5rem;margin-top:1.5rem}
.result-box[hidden]{display:none}
.result-range{font-size:2rem;font-weight:800;color:var(--green);margin-bottom:.25rem}
.result-label{font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:1rem}
.result-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.75rem;margin-bottom:1.25rem}
.result-item{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:.7rem 1rem}
.result-item .lbl{font-size:.75rem;color:var(--muted);margin-bottom:.2rem}
.result-item .val{font-size:1rem;font-weight:600}
.disclaimer{font-size:.78rem;color:var(--muted);line-height:1.6;border-top:1px solid var(--border);padding-top:.75rem;margin-top:.5rem}

/* AFFILIATE CTA */
.affiliate-cta{background:linear-gradient(135deg,rgba(59,130,246,.1),rgba(16,185,129,.05));border:1px solid rgba(59,130,246,.25);border-radius:var(--radius);padding:1.25rem 1.5rem;margin-top:1rem;text-align:center}
.affiliate-cta p{font-size:.9rem;color:var(--muted);margin-bottom:.75rem}
.cta-btn{display:inline-block;background:var(--green);color:#fff;text-decoration:none;padding:.55rem 1.5rem;border-radius:8px;font-weight:600;font-size:.9rem;margin:.25rem;transition:background .2s}
.cta-btn:hover{background:#059669}
.cta-btn.secondary{background:transparent;border:1px solid var(--green);color:var(--green)}
.cta-btn.secondary:hover{background:rgba(16,185,129,.1)}

/* INFO */
.info-section{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:2.5rem 0}
.info-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:1.5rem}
.info-grid h2{font-size:1rem;color:var(--accent);margin-bottom:.4rem}
.info-grid p{font-size:.88rem;color:var(--muted);line-height:1.7}

/* FAQ */
.faq-section{padding:2.5rem 0}
.faq-section>div>h2{font-size:1.5rem;margin-bottom:1.25rem}
.faq-list{display:flex;flex-direction:column;gap:.6rem}
details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
summary{padding:.9rem 1.1rem;cursor:pointer;font-weight:500;list-style:none;display:flex;justify-content:space-between}
summary::after{content:'+';color:var(--accent)}
details[open] summary::after{content:'−'}
details p{padding:0 1.1rem .9rem;color:var(--muted);font-size:.88rem;line-height:1.7}

footer{background:var(--surface);border-top:1px solid var(--border);padding:1.25rem 0;text-align:center;color:var(--muted);font-size:.8rem}
@media(max-width:600px){nav{display:none}.form-grid{grid-template-columns:1fr}.btn-calc{max-width:100%}}