:root{--gc-primary:#1a1a2e;--gc-primary-hover:#2a2a44;--gc-secondary:#6c727f;--gc-secondary-hover:#565b66;--gc-bg:#f4f5f7;--gc-surface:#fff;--gc-border:#d9dce1;--gc-text:#1a1a2e;--gc-error:#c0392b;--gc-radius:10px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{background:var(--gc-bg);color:var(--gc-text);margin:0}.gc-page{justify-content:center;align-items:flex-start;min-height:100vh;padding:48px 16px;display:flex}.gc-checkout{background:var(--gc-surface);border:1px solid var(--gc-border);border-radius:var(--gc-radius);flex-direction:column;gap:14px;width:100%;max-width:420px;padding:28px;display:flex;box-shadow:0 6px 24px #0000000f}.gc-logo{align-self:flex-start;max-height:40px}.gc-summary{font-size:1.25rem;font-weight:600}.gc-notice{color:var(--gc-secondary);font-size:.9rem;line-height:1.4}.gc-mock-note{color:#8a6d1f;background:#fff7e6;border:1px solid #ffe1a8;border-radius:8px;padding:8px 10px}.gc-field{flex-direction:column;gap:4px;display:flex}.gc-field-label{color:var(--gc-secondary);font-size:.8rem}.gc-input{border:1px solid var(--gc-border);border-radius:8px;width:100%;padding:10px 12px;font-size:1rem}.gc-input:focus{border-color:var(--gc-primary);outline:none;box-shadow:0 0 0 3px #1a1a2e1f}.gc-secure-field{align-items:center;height:42px;padding:0 12px;display:flex}.gc-secure-field.focus{border-color:var(--gc-primary);box-shadow:0 0 0 3px #1a1a2e1f}.gc-row{gap:10px;display:flex}.gc-row .gc-field{flex:1}.gc-error{color:var(--gc-error);min-height:1em;font-size:.85rem}.gc-error:empty{display:none}.gc-pay{background:var(--gc-primary);color:#fff;cursor:pointer;border:none;border-radius:8px;margin-top:6px;padding:12px 16px;font-size:1rem;font-weight:600;transition:background .15s}.gc-pay:hover:not(:disabled){background:var(--gc-primary-hover)}.gc-pay:disabled{opacity:.6;cursor:not-allowed}.gc-fatal{background:var(--gc-surface);border:1px solid var(--gc-border);border-radius:var(--gc-radius);max-width:420px;color:var(--gc-error);padding:24px}