* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            min-height: 100vh;
            background-color: #0d0d0d;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Container Utama */
        .container {
            width: 100%;
            min-height: 100vh;
            display: flex;
            background-color: #ffffff;
            overflow: hidden;
        }

        /* Panel Kiri / Utama - Theme Fitness Red-Purple Gradient */
        .login-card {
            flex: 1;
            max-width: 480px;
            background: linear-gradient(135deg, #cc0033 0%, #4a0033 100%);
            color: #ffffff;
            padding: 40px 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            align-items: center;
            text-align: center;
            overflow-y: auto;
            min-height: 100vh;
        }

        /* Header Logo */
        .brand-header {
            margin-top: 10px;
            margin-bottom: 20px;
        }

        .brand-logo img {
            width: 60px;
            height: auto;
            margin-bottom: 8px;
            filter: drop-shadow(0 4px 6px rgba(0,0,0,0.3));
        }

        .brand-title {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 2px;
            text-transform: uppercase;
        }

        .brand-title span {
            color: #ff3366;
        }

        /* Form Area */
        .auth-body {
            width: 100%;
            max-width: 360px;
            margin: 20px 0;
        }

        .welcome-text {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 25px;
        }

        .form-group {
            margin-bottom: 15px;
            text-align: left;
            position: relative;
        }

        .form-group label {
            display: block;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.75rem;
            margin-bottom: 6px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        input, select {
            width: 100%;
            padding: 12px 20px;
            border-radius: 25px;
            border: 1px solid rgba(255, 255, 255, 0.35);
            background: rgba(255, 255, 255, 0.12);
            color: #ffffff;
            font-size: 13px;
            outline: none;
            transition: all 0.3s ease;
        }

        select option {
            background: #4a0033;
            color: #ffffff;
        }

        input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        input:focus, select:focus {
            background: rgba(255, 255, 255, 0.2);
            border-color: #ffffff;
        }

        /* Custom Select2 Theme */
        .select2-container--default .select2-selection--single {
            background: rgba(255, 255, 255, 0.12) !important;
            border: 1px solid rgba(255, 255, 255, 0.35) !important;
            height: 42px !important;
            border-radius: 25px !important;
            display: flex;
            align-items: center;
        }

        .select2-container--default .select2-selection--single .select2-selection__rendered {
            color: white !important;
            padding-left: 20px !important;
        }

        .select2-dropdown {
            background: #4a0033 !important;
            border: 1px solid rgba(255, 255, 255, 0.2) !important;
            color: white !important;
            border-radius: 12px !important;
            overflow: hidden;
        }

        .select2-results__option--highlighted[aria-selected] {
            background-color: #cc0033 !important;
            color: #ffffff !important;
        }

        /* Tombol Bersebelahan (Side-by-Side) */
        .btn-group-row {
            display: flex;
            gap: 12px;
            margin-top: 20px;
            width: 100%;
        }

        .btn {
            flex: 1;
            padding: 12px;
            border-radius: 25px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            cursor: pointer;
            transition: all 0.2s ease;
            text-transform: uppercase;
            text-align: center;
        }

        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid #ffffff;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        .btn-solid {
            background: #ffffff;
            color: #4a0033;
            border: none;
        }

        .btn-solid:hover {
            background: #f0f0f0;
            transform: translateY(-1px);
        }

        /* Area Register Atas-Bawah (Collapsible) */
        #register-section {
            margin-top: 25px;
            padding-top: 25px;
            border-top: 1px dashed rgba(255, 255, 255, 0.25);
            display: none; /* Disembunyikan dulu secara default */
            animation: slideDown 0.4s ease-out forwards;
        }

        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .toggle-password {
            position: absolute;
            right: 18px;
            top: 34px;
            cursor: pointer;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }

        /* Social Media & Share Footer */
        .social-login {
            margin-top: 20px;
            margin-bottom: 10px;
        }

        .social-text {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 12px;
        }

        .social-icons {
            display: flex;
            justify-content: center;
            gap: 12px;
        }

        .social-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            text-decoration: none;
            font-size: 15px;
            transition: all 0.3s ease;
        }

        .social-icon:hover {
            background: #ffffff;
            color: #cc0033;
        }

        /* Panel Kanan (Mode Desktop Ala Facebook) */
        .desktop-banner {
            flex: 2;
            background-color: #fafafa;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 60px;
            background-image: radial-gradient(#cc0033 1px, transparent 1px);
            background-size: 24px 24px;
        }

        .banner-content {
            max-width: 500px;
            margin: 0 auto;
        }

        .banner-title {
            font-size: 40px;
            color: #222222;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
        }

        .banner-title span {
            color: #cc0033;
        }

        .banner-desc {
            font-size: 15px;
            color: #666666;
            line-height: 1.6;
        }

        .hidden { display: none !important; }
        .show-field { display: block !important; }

        /* Responsive Mobile */
        @media (max-width: 768px) {
            .desktop-banner { display: none; }
            .login-card { max-width: 100%; width: 100%; }
        }