:root{--color-primary: #dc2626;--color-accent-1: #06d1e0;--color-accent-2: #1fb1f9;--color-text: #111827;--color-muted: #6b7280;--color-bg: #f9fafb;--color-border: #e5e7eb}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,sans-serif;background:var(--color-bg);color:var(--color-text)}.app-header{background:#fff;border-bottom:1px solid var(--color-border);padding:.75rem 1rem;display:flex;align-items:center;gap:1rem;position:sticky;top:0;z-index:10}.app-header .brand{font-weight:800;color:var(--color-primary);font-size:1.1rem;text-decoration:none}.app-header nav{display:flex;gap:.75rem;margin-left:auto}.app-header nav a{color:var(--color-text);text-decoration:none;font-weight:500;font-size:.95rem}.app-header nav a.active{color:var(--color-primary)}.page{max-width:640px;margin:0 auto;padding:1.25rem 1rem 3rem}.hero{background:linear-gradient(135deg,var(--color-accent-1),var(--color-accent-2));border-radius:1rem;color:#fff;padding:2rem 1.5rem;margin-bottom:1.5rem}.hero h1{margin:0 0 .5rem;font-size:1.6rem}.hero p{margin:0;opacity:.95}.card{background:#fff;border:1px solid var(--color-border);border-radius:.75rem;padding:1rem;margin-bottom:1rem}.card h2,.card h3{margin-top:0}.btn{display:inline-block;background:var(--color-primary);color:#fff;border:none;border-radius:.5rem;padding:.7rem 1.2rem;font-weight:600;font-size:1rem;cursor:pointer;text-decoration:none}label{display:block;font-weight:600;margin:1rem 0 .25rem}input[type=range]{width:100%}.result-row{display:flex;justify-content:space-between;padding:.5rem 0;border-bottom:1px solid var(--color-border)}.result-row.total{font-weight:800;color:var(--color-primary);border-bottom:none}