#g2b-signup-banner {
        position: fixed;
        left: 0; right: 0; bottom: 0;
        z-index: 1019;
        padding: 14px 20px;
        
        background: #ffffff;
        border-top: 2px solid #3dd4b4;
        box-shadow: 0 -6px 32px rgba(0,0,0,0.10);
        transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
    }
    
    #g2b-signup-banner.sb-dark {
        background: linear-gradient(90deg, #0b1220 0%, #0d1e38 100%);
        border-top: 2px solid #3dd4b4;
        box-shadow: 0 -6px 32px rgba(0,0,0,0.45);
    }
    #g2b-signup-banner.sb-dark .g2b-sb__headline { color: #ffffff; }
    #g2b-signup-banner.sb-dark .g2b-sb__sub { color: rgba(255,255,255,0.65); }
    #g2b-signup-banner.sb-dark .g2b-sb__sub strong { color: #3dd4b4; }
    #g2b-signup-banner.sb-dark     
    #g2b-signup-banner.sb-light,
    #g2b-signup-banner:not(.sb-dark) {
        background: #ffffff;
        border-top: 2px solid #3dd4b4;
        box-shadow: 0 -6px 32px rgba(0,0,0,0.10);
    }
    #g2b-signup-banner.sb-light .g2b-sb__headline,
    #g2b-signup-banner:not(.sb-dark) .g2b-sb__headline { color: #111827; }
    #g2b-signup-banner.sb-light .g2b-sb__sub,
    #g2b-signup-banner:not(.sb-dark) .g2b-sb__sub { color: #6b7280; }
    #g2b-signup-banner.sb-light .g2b-sb__sub strong,
    #g2b-signup-banner:not(.sb-dark) .g2b-sb__sub strong { color: #059669; }
    
    .g2b-sb__inner {
        max-width: 1100px;
        margin: 0 auto;
        display: flex;
        align-items: center;
        gap: 20px;
    }
    .g2b-sb__copy { flex: 1 1 auto; min-width: 0; }
    .g2b-sb__headline {
        font-size: 15px;
        font-weight: 700;
        margin: 0 0 2px;
        line-height: 1.3;
    }
    .g2b-sb__sub {
        font-size: 12px;
        margin: 0;
        line-height: 1.4;
    }
    .g2b-sb__actions {
        display: flex;
        gap: 8px;
        flex-shrink: 0;
        align-items: center;
    }
    .g2b-sb__btn {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        padding: 9px 18px;
        border-radius: 8px;
        font-size: 13px;
        font-weight: 700;
        text-decoration: none;
        white-space: nowrap;
        transition: opacity 0.15s, transform 0.1s;
        border: none;
    }
    .g2b-sb__btn:hover { opacity: 0.88; transform: translateY(-1px); text-decoration: none; }
    .g2b-sb__btn--google {
        background: #fff;
        color: #222;
        box-shadow: 0 1px 4px rgba(0,0,0,0.18);
    }
    .g2b-sb__btn--kakao {
        background: #FEE500;
        color: #3C1E1E;
    }
    @media (max-width: 1024px) {
        .g2b-sb__copy { display: none; }
    }
    
    body.g2b-banner-open { padding-bottom: 72px; }
    
    @media (max-width: 767.98px) {
        #g2b-signup-banner .g2b-sb__inner { padding: 6px 10px; justify-content: stretch; }
        #g2b-signup-banner .g2b-sb__actions { width: 100%; }
        #g2b-signup-banner .g2b-sb__btn { width: 100%; justify-content: center; padding: 9px 12px; font-size: .92rem; }
        body.g2b-banner-open { padding-bottom: 52px; }
        
    }