:root{--color-bg: #f5f5f5;--color-surface: #ffffff;--color-border: #e0e0e0;--color-text: #1a1a1a;--color-text-muted: #6b7280;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-danger: #dc2626;--color-danger-bg: #fef2f2;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.5;min-height:100vh}h1{font-size:1.5rem;font-weight:600}h2{font-size:1.25rem;font-weight:600}p{color:var(--color-text-muted)}.form-group{display:flex;flex-direction:column;gap:6px}label{font-size:.875rem;font-weight:500;color:var(--color-text)}input[type=email],input[type=password],input[type=text]{width:100%;padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius);font-size:.9375rem;color:var(--color-text);background:var(--color-surface);transition:border-color .15s,box-shadow .15s;outline:none}input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1f}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border:none;border-radius:var(--radius);font-size:.9375rem;font-weight:500;cursor:pointer;transition:background .15s,opacity .15s;text-decoration:none}.btn-primary{background:var(--color-primary);color:#fff;width:100%}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-ghost{background:transparent;color:var(--color-text-muted);border:1px solid var(--color-border)}.btn-ghost:hover:not(:disabled){background:var(--color-bg);color:var(--color-text)}.btn:disabled{opacity:.5;cursor:not-allowed}.error-msg{font-size:.875rem;color:var(--color-danger);background:var(--color-danger-bg);border:1px solid #fecaca;border-radius:var(--radius);padding:8px 12px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}.page-centered{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}.page{padding:32px;max-width:1024px;margin:0 auto}