:root{--primary:#2563eb;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;--bg:#f8fafc;--green:#15803d;--red:#dc2626;--amber:#b45309}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.6}a{text-decoration:none;color:inherit}button,input,select{font:inherit}button{cursor:pointer}
.tool-header{height:72px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.header-container{max-width:1180px;height:100%;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:25px;font-weight:900}.header-nav{display:flex;gap:28px;color:var(--muted);font-size:14px;font-weight:650}
.main-container{max-width:1180px;margin:auto;padding:64px 24px 80px}.tool-intro{text-align:center;max-width:850px;margin:0 auto 42px}.tool-badge{display:inline-block;padding:7px 13px;border-radius:999px;background:#eff6ff;color:var(--primary);font-size:12px;font-weight:850}.tool-intro h1{font-size:clamp(42px,6vw,66px);line-height:1;letter-spacing:-2.8px;margin:20px 0}.tool-intro h1 span{color:var(--primary)}.tool-intro p{color:var(--muted);font-size:19px}
.panel,.results-section,.formula-section,.info-section,.faq-section,.related-section{background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:0 12px 35px rgba(15,23,42,.055);padding:28px;margin-bottom:24px}.panel-header,.results-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}
.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:25px}.form-group label{display:block;font-size:13px;font-weight:800;margin-bottom:7px}.form-group small{display:block;color:#94a3b8;font-size:11px;margin-top:6px}.optional{font-weight:500;color:#94a3b8}
input,select{width:100%;min-height:46px;border:1px solid #cbd5e1;border-radius:10px;background:#fff;padding:10px 12px;outline:none}input:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.primary-button,.secondary-button,.danger-button{border-radius:10px;padding:11px 16px;font-weight:800}.primary-button{background:var(--primary);border:0;color:#fff}.secondary-button{background:#fff;border:1px solid #cbd5e1;color:#334155}.danger-button{background:#fff1f2;border:1px solid #fecdd3;color:#be123c}.calculate-row{display:flex;gap:10px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}
.results-section{background:linear-gradient(135deg,#fff,#f8fbff)}.status-pill{display:inline-flex;padding:7px 11px;border-radius:999px;font-size:11px;font-weight:900}.status-pill.neutral{background:#f1f5f9;color:#475569}.status-pill.good{background:#f0fdf4;color:var(--green)}.status-pill.warning{background:#fffbeb;color:var(--amber)}.status-pill.danger{background:#fef2f2;color:var(--red)}
.results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:22px}.result-card{border:1px solid var(--border);border-radius:15px;padding:18px;background:#fff}.result-card span{display:block;color:var(--muted);font-size:13px}.result-card strong{display:block;font-size:29px;margin:5px 0}.result-card small{color:#94a3b8;font-size:11px}.primary-result{background:#eff6ff;border-color:#bfdbfe}.primary-result strong{color:var(--primary)}
.recommendation-card{margin-top:14px;border-radius:15px;padding:20px;background:#f8fafc;border:1px solid var(--border)}.recommendation-card.good{background:#f0fdf4}.recommendation-card.warning{background:#fffbeb}.recommendation-card.danger{background:#fef2f2}.recommendation-card h3{margin:0 0 5px}.recommendation-card p{margin:0;color:var(--muted)}
.secondary-results{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:14px}.secondary-results>div{padding:16px;border:1px solid var(--border);border-radius:14px}.secondary-results span{display:block;font-size:12px;color:var(--muted)}.secondary-results strong{display:block;margin-top:5px}
.formula-box{margin:18px 0;padding:18px;border-radius:13px;background:#0f172a;color:#fff}.section-label{color:var(--primary);font-weight:850;font-size:12px}.formula-section p,.faq-section p{color:var(--muted)}
.info-grid,.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:22px}.related-grid{grid-template-columns:repeat(3,1fr)}.info-grid>div{border-top:2px solid #dbeafe;padding-top:15px}.info-grid span{color:var(--primary);font-size:12px;font-weight:900}.info-grid h3{margin:6px 0}.info-grid p{margin:0;color:var(--muted);font-size:14px}.faq-section details{padding:16px 0;border-bottom:1px solid var(--border)}.faq-section summary{font-weight:800;cursor:pointer}
.related-card{display:flex;flex-direction:column;gap:5px;border:1px solid var(--border);border-radius:14px;padding:18px}.related-card span{font-size:22px}.related-card small{color:#94a3b8}.muted{opacity:.7}
.tool-footer{border-top:1px solid var(--border);background:#fff;padding:28px 24px;display:flex;justify-content:space-between;color:var(--muted)}.tool-footer div{display:flex;gap:12px;align-items:center}.tool-footer strong{color:var(--text)}
@media(max-width:1000px){.form-grid{grid-template-columns:repeat(2,1fr)}.results-grid{grid-template-columns:repeat(2,1fr)}.info-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.header-nav{display:none}.main-container{padding:42px 14px 60px}.tool-intro h1{font-size:42px}.panel,.results-section,.formula-section,.info-section,.faq-section,.related-section{padding:20px}.panel-header,.results-header{flex-direction:column}.form-grid,.results-grid,.secondary-results,.info-grid,.related-grid{grid-template-columns:1fr}.calculate-row{flex-direction:column}.calculate-row button{width:100%}.tool-footer{flex-direction:column;gap:12px}input,select{font-size:16px}}