:root {
            --primary: #0d6efd;
            --dark-bg: #0f172a;
            --glass: rgba(255, 255, 255, 0.98);
        }

        body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background-color: var(--dark-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            margin: 0;
            overflow-x: hidden;
        }

        /* İnteraktif Arka Plan Canvas */
        #bgCanvas {
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            z-index: 0; pointer-events: none;
        }

        .main-container {
            z-index: 10;
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px 20px;
        }

        .payment-card {
            background: var(--glass);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            width: 100%;
            max-width: 1100px;
            display: flex;
            flex-direction: row;
            overflow: hidden;
        }

        /* SOL PANEL */
        .info-side {
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
            width: 40%;
            padding: 40px;
            border-right: 1px solid #e2e8f0;
            display: flex;
            flex-direction: column;
        }

        /* BANKA DEĞİŞTİRME ÜNİTESİ */
        .brand-header {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 30px;
        }
        .bank-logo-wrapper {
            position: relative;
            background: white;
            padding: 8px;
            border-radius: 10px;
            border: 1px solid #e2e8f0;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
        }
        .change-bank-btn {
            position: absolute;
            top: -8px; right: -8px;
            width: 24px; height: 24px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            cursor: pointer;
            border: 2px solid white;
            transition: 0.3s;
        }
        .change-bank-btn:hover { transform: scale(1.1); background: #000; }

        /* 3D KART */
        .card-visual-space {
            perspective: 1000px;
            width: 100%; height: 200px;
            margin-bottom: 30px;
        }
        .card-inner {
            position: relative;
            width: 100%; height: 100%;
            transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
            transform-style: preserve-3d;
        }
        .is-flipped { transform: rotateY(180deg); }
        .card-front, .card-back {
            position: absolute;
            width: 100%; height: 100%;
            backface-visibility: hidden;
            border-radius: 16px;
            padding: 20px;
            color: white;
        }
        .card-front { background: linear-gradient(135deg, #1e293b 0%, #3b82f6 100%); }
        .card-back { 
            background: linear-gradient(135deg, #334155 0%, #1e293b 100%); 
            transform: rotateY(180deg);
            padding: 0; display: flex; flex-direction: column; justify-content: center;
        }
        .magnetic-strip { background: #000; width: 100%; height: 40px; }
        .cvv-bar {
            background: #fff; color: #333; width: 80%; height: 32px;
            margin: 15px auto; text-align: right; padding: 4px 12px;
            font-weight: bold; border-radius: 4px;
        }
        .card-num {
            font-size: 1.1rem; letter-spacing: 2px;
            font-family: 'Courier New', monospace;
            margin: 15px 0; display: block;
        }

        /* SAĞ PANEL */
        .form-side { width: 60%; padding: 40px; background: white; }
        .form-control { border: 2px solid #e2e8f0; border-radius: 12px; padding: 12px; }
        .form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.1); }
        .btn-pay {
            background: var(--primary); border: none; border-radius: 12px;
            padding: 16px; color: white; font-weight: 700; width: 100%; margin-top: 15px;
        }

        /* BANKA MODAL KARTLARI */
        .bank-option-card {
            border: 1px solid #eee;
            border-radius: 12px;
            padding: 15px;
            text-align: center;
            cursor: pointer;
            transition: 0.3s;
        }
        .bank-option-card:hover { border-color: var(--primary); background: #f8fafc; }
        .bank-option-card img { height: 25px; margin-bottom: 8px; }

        .contact-box { font-size: 0.85rem; color: #475569; margin-top: auto; }
        .contact-box p { margin-bottom: 8px; display: flex; align-items: flex-start; gap: 10px; }
        .contact-box i { color: var(--primary); width: 15px; }

        .site-footer { background: #0f172a; padding: 40px 0; color: #94a3b8; font-size: 0.85rem; z-index: 10; }
        .footer-link { color: #cbd5e1; text-decoration: none; margin: 0 10px; cursor: pointer; }

        .step-panel { display: none; animation: fadeIn 0.4s ease; }
        .active { display: block; }
        @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

        @media (max-width: 992px) {
            .payment-card { flex-direction: column; }
            .info-side, .form-side { width: 100%; border-right: none; }
        }







			.info-side {
    width: 440px !important;
  }
.form-side {
    width: 660px !important;
  }
			@media only screen and (max-width: 600px) {
  .info-side {
    width: auto !important;
  }
				.form-side {
    width: auto !important;
  }
}