:root{--bg:#f3fdf8;--card:#fff;--primary:#065f46;--dark:#072e33;--accent:#10b981;--soft:#d1fae5;--text:#1f2937;--muted:#6b7280;--border:#d1d5db}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}.topbar{height:64px;padding:0 28px;background:var(--dark);color:#fff;display:flex;align-items:center;justify-content:space-between}.topbar a{color:#fff;text-decoration:none}.container{max-width:1050px;margin:auto;padding:50px 28px 76px}.hero h1{margin:6px 0 12px;color:var(--primary);font-size:40px}.eyebrow{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.hero p,.muted{color:var(--muted);line-height:1.65}.panel{margin-top:22px;padding:24px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:0 10px 26px rgba(0,0,0,.055)}.panel h2{margin-top:0;color:var(--primary)}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.field{margin-bottom:14px}label{display:block;color:var(--primary);font-weight:700;margin-bottom:6px}input,select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:7px;font:inherit}.button{border:0;border-radius:7px;padding:11px 16px;background:var(--accent);color:#fff;font-weight:700;cursor:pointer}.results{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.result{padding:17px;background:#fbfffd;border:1px solid var(--soft);border-radius:10px}.result strong{display:block;color:var(--primary);font-size:25px;margin-top:5px}canvas{display:block;width:100%;height:auto;background:#fbfffd;border:1px solid var(--soft);border-radius:10px}table{width:100%;border-collapse:collapse}th,td{padding:10px;border-bottom:1px solid #e5e7eb;text-align:center}th{color:var(--primary)}.interval{position:relative;height:70px;margin-top:22px}.axis{position:absolute;left:3%;right:3%;top:34px;height:3px;background:#d1d5db}.range{position:absolute;top:29px;height:13px;border-radius:99px;background:var(--accent)}.center{position:absolute;top:20px;width:3px;height:30px;background:var(--primary)}.footer{text-align:center;padding:18px;background:var(--primary);color:#d1fae5}@media(max-width:720px){.grid,.results{grid-template-columns:1fr}.container{padding:34px 18px 60px}.hero h1{font-size:32px}}