:root{
  --bg: #f6f8fb;
  --card: #ffffff;
  --accent: #2563eb;
  --muted: #6b7280;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(16,24,40,0.06);
}
body{font-family:system-ui, -apple-system, 'Segoe UI', Roboto; background:var(--bg); margin:0; padding:18px}
.dsat-root{max-width:820px;margin:14px auto;padding:8px}
.dsat-title{text-align:center;font-size:22px;margin-bottom:10px;color:var(--accent)}
.dsat-card{background:var(--card);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);border:1px solid rgba(37,99,235,0.06)}
.dsat-intro{color:var(--muted);margin-bottom:12px}
.dsat-form label{display:block;margin:10px 0;font-weight:600;color:#111}
.dsat-form input[type="number"], .dsat-form select{width:100%;padding:12px;border-radius:8px;border:1px solid rgba(0,0,0,0.06);box-sizing:border-box;font-size:15px}
.dsat-actions{display:flex;gap:10px;margin-top:12px}
.dsat-btn{flex:1;padding:12px;border-radius:8px;border:none;background:linear-gradient(90deg,var(--accent),#60a5fa);color:#fff;font-weight:700;cursor:pointer}
.dsat-btn-ghost{background:transparent;border:1px solid rgba(0,0,0,0.06);color:var(--accent)}
.dsat-result{margin-top:14px;padding:14px;border-radius:8px;background:linear-gradient(180deg,rgba(37,99,235,0.03),rgba(96,165,250,0.02));border:1px solid rgba(37,99,235,0.06)}
.dsat-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.dsat-total{font-size:18px;color:#0f172a;font-weight:800}
.dsat-tier{font-size:14px;font-weight:700}
.dsat-break{margin-top:8px;color:#08102a}
.dsat-bar{height:10px;background:rgba(2,6,23,0.04);border-radius:8px;margin-top:10px;overflow:hidden}
.dsat-bar-fill{height:100%;width:10%;border-radius:8px}
.dsat-advice{margin-top:10px;color:var(--muted);font-weight:600}
.dsat-note{margin-top:10px;font-size:13px;color:var(--muted)}

@media(max-width:640px){ .dsat-actions{flex-direction:column} .dsat-root{padding:8px} }