*,*:before,*:after{box-sizing:border-box}:root{--color-primary: #0066cc;--color-primary-hover: #0052a3;--color-danger: #dc3545;--color-danger-hover: #c82333;--color-success-bg: #d4edda;--color-success-text: #155724;--color-error-bg: #fee;--color-error-text: #c00;--color-text: #222;--color-text-muted: #666;--color-bg: #f5f5f5;--color-surface: #fff;--color-border: #ddd;--radius-sm: 4px;--radius-md: 8px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 2px 8px rgba(0, 0, 0, .12)}html{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.5;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}body{margin:0;min-height:100vh}h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.25}p{margin:0}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}input,button{font-family:inherit;font-size:inherit}input[type=text],input[type=email],input[type=password]{padding:.625rem .75rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);width:100%}input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px #0066cc26}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.5rem 1rem;border:none;border-radius:var(--radius-sm);font-size:.875rem;font-weight:500;cursor:pointer;transition:background-color .15s;background:var(--color-primary);color:#fff}.btn:hover:not(:disabled){background:var(--color-primary-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:#eee;color:var(--color-text)}.btn-secondary:hover:not(:disabled){background:#e0e0e0}.btn-danger{background:var(--color-danger)}.btn-danger:hover:not(:disabled){background:var(--color-danger-hover)}.btn-link{background:none;border:none;color:var(--color-danger);cursor:pointer;font-size:.875rem;padding:0}.btn-link:hover{text-decoration:underline}.msg-success{padding:.75rem;background:var(--color-success-bg);color:var(--color-success-text);border-radius:var(--radius-sm)}.msg-error{padding:.75rem;background:var(--color-error-bg);color:var(--color-error-text);border-radius:var(--radius-sm)}.container{width:100%;max-width:800px;margin:0 auto;padding:1.5rem 1rem}.container-wide{max-width:1000px}@media(min-width:640px){.container{padding:2rem 1.5rem}}