:root{--primary: #0f172a;--primary-light: #1e293b;--accent: #3b82f6;--accent-hover: #2563eb;--background: #f8fafc;--surface: #ffffff;--text: #334155;--text-light: #64748b;--border: #e2e8f0;--success: #10b981;--danger: #ef4444;--radius: 12px;--shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);font-family:Inter,system-ui,-apple-system,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--background);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}input,button,select,textarea{font-family:inherit;font-size:1rem}.container{max-width:800px;margin:0 auto;padding:20px}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:20px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:var(--radius);font-weight:600;cursor:pointer;border:none;transition:all .2s;gap:8px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:active{transform:scale(.98)}.btn-accent{background:var(--accent);color:#fff}.btn-outline{background:transparent;border:2px solid var(--border);color:var(--text)}.form-group{margin-bottom:16px}.label{display:block;margin-bottom:8px;font-weight:500;color:var(--text)}.input{width:100%;padding:12px;border-radius:8px;border:1px solid var(--border);background:var(--background);transition:border-color .2s}.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #3b82f61a}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.title{font-size:1.5rem;font-weight:700;color:var(--primary)}.nav-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px}.nav-item{background:var(--surface);padding:16px;border-radius:var(--radius);text-align:center;text-decoration:none;color:var(--text);font-weight:600;border:2px solid transparent;transition:all .2s;display:flex;flex-direction:column;align-items:center;gap:8px;box-shadow:var(--shadow)}.nav-item.active{border-color:var(--accent);color:var(--accent);background:#eff6ff}