@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
        
        body {
            background-color: #101c3f; /* Yüklenmezse varsayılan lacivert */
            /* GÜNCELLENDİ: Siyah sadece solda (%0) başlar ve %55'e gelindiğinde tamamen laciverte döner.
               Böylece siyahın miktarı azalmış ve geçiş sola çekilmiş olur. */
            background-image: linear-gradient(90deg, #000000 0%, #101c3f 55%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'Inter', sans-serif;
            position: relative;
            overflow: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            /* Nokta dokusu */
            background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23FFFFFF" fill-opacity="0.03"><circle cx="30" cy="30" r="1.5"/></g></g></svg>');
            z-index: 1;
        }

        .login-container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 24px;
            padding: 50px 40px;
            max-width: 450px;
            width: 100%;
            text-align: center;
            position: relative;
            z-index: 2;
            box-shadow:
                0 25px 50px -12px rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(255, 255, 255, 0.1);
        }
        
        .login-header {
            background: linear-gradient(135deg, #1e293b 0%, #475569 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }
        
        .login-subtitle {
            color: #64748b;
            font-size: 16px;
            font-weight: 400;
            margin-bottom: 40px;
            opacity: 0.8;
        }
        
        .form-group {
            position: relative;
            margin-bottom: 24px;
        }
        
        .form-control {
            background: rgba(248, 250, 252, 0.8);
            border: 2px solid rgba(226, 232, 240, 0.8);
            border-radius: 16px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 500;
            color: #334155;
            width: 100%;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(10px);
        }
        
        .form-control:focus {
            background: rgba(255, 255, 255, 0.95);
            border-color: #3b82f6;
            box-shadow: 
                0 0 0 4px rgba(59, 130, 246, 0.1),
                0 10px 25px -5px rgba(0, 0, 0, 0.1);
            transform: translateY(-2px);
            outline: none;
        }
        
        .form-control::placeholder {
            color: #94a3b8;
            font-weight: 400;
        }
        
        .btn-login {
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            border: none;
            color: white;
            padding: 18px 32px;
            border-radius: 16px;
            font-size: 16px;
            font-weight: 600;
            width: 100%;
            margin-top: 20px;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
        }
        
        .btn-login::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }
        
        .btn-login:hover {
            transform: translateY(-3px);
            box-shadow: 
                0 20px 40px -8px rgba(59, 130, 246, 0.4),
                0 0 0 1px rgba(255, 255, 255, 0.2);
            color: white;
        }
        
        .btn-login:hover::before {
            left: 100%;
        }
        
        .btn-login:active {
            transform: translateY(-1px);
        }
        
        .footer-info {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(226, 232, 240, 0.6);
            color: #64748b;
            font-size: 14px;
            font-weight: 500;
        }
        
        .footer-info strong {
            color: #475569;
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        
        .alert {
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.2);
            color: #dc2626;
            border-radius: 12px;
            padding: 16px;
            margin-bottom: 24px;
            font-weight: 500;
            backdrop-filter: blur(10px);
        }
        
        .alert-success {
            background: rgba(34, 197, 94, 0.1);
            border-color: rgba(34, 197, 94, 0.2);
            color: #16a34a;
        }
        
        .close {
            background: none;
            border: none;
            color: inherit;
            opacity: 0.7;
            font-size: 20px;
            line-height: 1;
            padding: 0;
        }
        
        .close:hover {
            opacity: 1;
        }
        
        /* Glassmorphism effects */
        @supports (backdrop-filter: blur(20px)) {
            .login-container {
                background: rgba(255, 255, 255, 0.1);
                backdrop-filter: blur(20px);
            }
        }

        /* WhatsApp Buton Stili */
        .btn-whatsapp-support {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: #25D366; /* WhatsApp Yeşili */
            color: white !important;
            padding: 10px 24px;
            border-radius: 50px; /* Yuvarlak kenarlar */
            font-weight: 600;
            font-size: 15px;
            text-decoration: none !important;
            box-shadow: 0 4px 10px rgba(37, 211, 102, 0.3);
            transition: all 0.3s ease;
            margin-top: 5px;
            margin-bottom: 15px;
        }

        .btn-whatsapp-support:hover {
            background-color: #128C7E; /* Üzerine gelince koyulaşır */
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(37, 211, 102, 0.4);
            color: white;
        }