*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-secondary: #f59e0b;--color-bg: #f8fafc;--color-surface: #ffffff;--color-text: #0f172a;--color-text-muted: #64748b;--color-border: #e2e8f0;--radius: 12px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06)}html,body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:16px;background:var(--color-bg);color:var(--color-text);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;padding:.75rem 1.5rem;transition:background .15s,transform .1s}button:active{transform:scale(.98)}.btn-primary{background:var(--color-primary);color:#fff;width:100%}.btn-primary:hover{background:var(--color-primary-dark)}input,textarea,select{width:100%;border:1.5px solid var(--color-border);border-radius:var(--radius);padding:.75rem 1rem;font-size:1rem;font-family:inherit;background:var(--color-surface);color:var(--color-text);outline:none;transition:border-color .15s}input:focus,textarea:focus,select:focus{border-color:var(--color-primary)}label{display:block;font-weight:500;margin-bottom:.4rem;font-size:.9rem}.container{max-width:480px;margin:0 auto;padding:1rem 1.25rem}.card{background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}.stack{display:flex;flex-direction:column;gap:1rem}