.seismic-guide{--navy:#0b1f3a;--blue:#1677ff;--bg:#f4f7fb;--card:#fff;--text:#152033;--muted:#68758a;--line:#dfe6ef;--warn:#fff7e7;--warnText:#805719}
    .seismic-guide, .seismic-guide *{box-sizing:border-box}.seismic-guide{scroll-behavior:smooth}.seismic-guide{margin:0;background:var(--bg);color:var(--text);font-family:Vazirmatn,IRANSansX,Tahoma,Arial,sans-serif;line-height:1.95}
    .seismic-guide .wrap{max-width:1080px;margin:auto;padding:24px}.seismic-guide .hero{background:linear-gradient(135deg,#0b1f3a,#15375f);color:#fff;border-radius:24px;padding:30px;margin-bottom:20px}.seismic-guide .hero h1{margin:0 0 8px;font-size:clamp(24px,4vw,38px)}.seismic-guide .hero p{margin:0;color:#dbe8f8}
    .seismic-guide .card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;margin-bottom:18px;box-shadow:0 10px 30px rgba(11,31,58,.06)}.seismic-guide h2, .seismic-guide h3{color:var(--navy);margin-top:0}.seismic-guide .toc a{color:#1459b8;text-decoration:none}.seismic-guide .toc li{margin:6px 0}.seismic-guide .step{display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start;margin:18px 0}.seismic-guide .num{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#eaf2ff;color:#1459b8;font-weight:800}.seismic-guide .note{background:var(--warn);color:var(--warnText);border:1px solid #f1d79a;border-radius:12px;padding:13px 15px}.seismic-guide .ok{background:#ecfbf4;color:#176b4d;border:1px solid #bde8d5;border-radius:12px;padding:13px 15px}.seismic-guide .info{background:#edf5ff;color:#245b99;border:1px solid #cfe2ff;border-radius:12px;padding:13px 15px}
    .seismic-guide table{width:100%;border-collapse:collapse;margin:14px 0;font-size:14px}.seismic-guide th, .seismic-guide td{padding:11px;border-bottom:1px solid var(--line);text-align:right;vertical-align:top}.seismic-guide th{background:#f7f9fc}.seismic-guide .ltr{direction:ltr;unicode-bidi:isolate}.seismic-guide .formula{direction:ltr;text-align:center;background:#f7f9fc;border:1px solid var(--line);border-radius:12px;padding:12px;margin:10px 0;font-family:Georgia,serif}.seismic-guide .kbd{display:inline-block;background:#eef2f7;border:1px solid #cdd6e2;border-bottom-width:2px;border-radius:6px;padding:0 7px;font-size:12px}.seismic-guide .btn{display:inline-flex;background:var(--blue);color:#fff;text-decoration:none;padding:11px 16px;border-radius:11px;margin-top:8px}.seismic-guide .footer{text-align:center;color:var(--muted);font-size:12px;padding:16px}@media (max-width:650px){.seismic-guide .wrap{padding:12px}.seismic-guide .hero, .seismic-guide .card{padding:17px}.seismic-guide .step{grid-template-columns:36px 1fr}.seismic-guide .num{width:34px;height:34px}}
  
.seismic-guide{padding:28px 0 54px;background:#f4f7fb;color:#152033;min-height:70vh;font-family:"Vazirmatn","Vazir",Tahoma,Arial,sans-serif;line-height:1.95}
.seismic-guide .guide-top-links{max-width:1080px;margin:0 auto 16px;padding:0 24px;display:flex;gap:10px;flex-wrap:wrap}
.seismic-guide .guide-top-links a{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:14px;background:#2563ff;color:#fff;text-decoration:none;font-weight:800}
.seismic-guide .guide-top-links a.secondary{background:#fff;color:#0b1f3a;border:1px solid #c5d3e6}
@media(max-width:650px){.seismic-guide .guide-top-links{padding:0 12px}.seismic-guide .guide-top-links a{flex:1}}