html, body {
            height: 100%;
            margin: 0;
            padding: 0;
        }
        body {
            min-height: 100vh;
            font-family: 'Montserrat', Arial, sans-serif;
            overflow: hidden;
        }
        .bg-video {
            position: fixed;
            top: 0; left: 0;
            width: 100vw;
            height: 100vh;
            object-fit: cover;
            z-index: 0;
        }
        .video-overlay {
            position: fixed;
            top: 0; left: 0;
            width: 100vw;
            height: 100vh;
            background: linear-gradient(120deg, rgba(10,30,60,0.7) 0%, rgba(0,0,0,0.5) 100%);
            z-index: 1;
        }
        .login-card {
            position: relative;
            z-index: 2;
            background: rgba(255,255,255,0.98);
            border-radius: 32px;
            box-shadow: 0 8px 40px 0 rgba(10, 30, 60, 0.18);
            padding: 48px 36px 36px 36px;
            max-width: 410px;
            width: 100%;
            margin: 40px 0 16px 0;
            border: none;
        }
        .login-card .logo {
            width: 100px;
            margin-bottom: 18px;
        }
        .login-card h1 {
            font-weight: 700;
            font-size: 2.1rem;
            color: #0a1e3c;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }
        .login-card .subtitle {
            color: #00688f;
            font-size: 1.08rem;
            margin-bottom: 28px;
            font-weight: 500;
        }
        .login-card .form-label {
            color: #0a1e3c;
            font-weight: 600;
        }
        .login-card .input-group-text {
            background: #f7fafd;
            border: none;
            color: #00688f;
            font-size: 1.2rem;
        }
        .login-card .form-control {
            border-radius: 12px;
            font-size: 1.08rem;
            padding: 14px 18px;
            background: #f7fafd;
            border: none;
            color: #0a1e3c;
            box-shadow: 0 2px 8px 0 rgba(10,30,60,0.04);
            transition: box-shadow 0.2s;
        }
        .login-card .form-control:focus {
            box-shadow: 0 0 0 2px #00b4d8;
            border-color: #00b4d8;
            background: #fff;
        }
        .login-card .btn-login {
            background: linear-gradient(90deg, #00688f 0%, #00b4d8 100%);
            color: #fff;
            border-radius: 14px;
            font-weight: 700;
            font-size: 1.13rem;
            padding: 14px 0;
            margin-top: 18px;
            transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
            box-shadow: 0 4px 16px 0 rgba(0, 180, 216, 0.10);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .login-card .btn-login:hover {
            background: linear-gradient(90deg, #00b4d8 0%, #00688f 100%);
            transform: translateY(-2px) scale(1.03);
            box-shadow: 0 8px 24px 0 rgba(0, 180, 216, 0.18);
        }
        .vizyon {
            color: #4a5a6a;
            font-size: 0.98rem;
            font-weight: 500;
            text-align: center;
            margin-top: 28px;
            margin-bottom: 0;
            opacity: 0.85;
        }
        .destek-modern {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            margin: 32px 0 0 0;
            z-index: 2;
            position: relative;
        }
        .destek-card {
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 2px 12px 0 rgba(10,30,60,0.07);
            padding: 16px 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            min-width: 180px;
            font-size: 1.08rem;
            color: #0a1e3c;
            font-weight: 600;
            border: 1px solid #e6eaf0;
            transition: box-shadow 0.2s, border 0.2s;
        }
        .destek-card i {
            color: #00b4d8;
            font-size: 1.3rem;
        }
        .destek-card:hover {
            box-shadow: 0 4px 24px 0 rgba(0,180,216,0.13);
            border: 1.5px solid #00b4d8;
        }
        .footer {
            position: relative;
            z-index: 2;
            color: #e6eaf0;
            font-size: 14px;
            text-align: center;
            margin-top: 18px;
            letter-spacing: 0.5px;
            opacity: 0.85;
        }
        @media (max-width: 600px) {
            .login-card {
                padding: 18px 4vw 18px 4vw;
            }
            .destek-modern {
                flex-direction: column;
                gap: 10px;
            }
            .destek-card {
                min-width: 0;
                width: 100%;
                justify-content: center;
            }
        }
        .login-card {
            max-width: 340px;
            padding: 32px 20px 24px 20px;
            border-radius: 28px;
        }
        .login-card .logo {
            width: 80px;
            margin-bottom: 10px;
        }
        .login-card h1 {
            font-size: 1.6rem;
        }
        .login-card .subtitle {
            font-size: 1rem;
            margin-bottom: 18px;
        }
        .login-card .form-control {
            font-size: 1rem;
            padding: 10px 14px;
            border-radius: 10px;
        }
        .login-card .btn-login {
            font-size: 1.05rem;
            padding: 12px 0;
            border-radius: 12px;
            margin-top: 14px;
        }
        .vizyon {
            font-size: 0.95rem;
            margin-top: 18px;
        }
        @media (max-width: 600px) {
            .login-card {
                padding: 10px 2vw 10px 2vw;
                border-radius: 14px;
            }
        }
        @media (max-width: 900px) {
            .login-card {
                max-width: 90vw;
                padding: 24px 4vw 18px 4vw;
            }
            .destek-modern {
                gap: 10px;
            }
        }
        @media (max-width: 600px) {
            .login-card {
                max-width: 98vw;
                padding: 10px 2vw 10px 2vw;
                border-radius: 14px;
            }
            .login-card .logo {
                width: 60px;
            }
            .login-card h1 {
                font-size: 1.15rem;
            }
            .login-card .subtitle {
                font-size: 0.95rem;
            }
            .login-card .form-control {
                font-size: 0.95rem;
                padding: 8px 10px;
            }
            .login-card .btn-login {
                font-size: 0.98rem;
                padding: 10px 0;
            }
            .vizyon {
                font-size: 0.90rem;
                margin-top: 10px;
            }
            .destek-modern {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 8px;
                margin-top: 18px;
                width: 100%;
            }
            .destek-card {
                min-width: 0;
                width: 100%;
                justify-content: center;
                font-size: 0.98rem;
                padding: 10px 6px;
                text-align: center;
                border-radius: 14px;
            }
        }