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

        body {
            background: linear-gradient(135deg, #0a0e17 0%, #0f1525 50%, #121a2e 100%);
            color: #e0e7ff;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            position: relative;
            overflow-x: hidden;
        }

        /* Latar belakang dengan efek laut */
        .ocean-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .wave {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 200%;
            height: 100px;
            background: url('https://images.unsplash.com/photo-1530539595977-0aa9890543c8?q=80&w=1974&auto=format&fit=crop') repeat-x;
            background-size: contain;
            opacity: 0.1;
            animation: wave-animation 20s linear infinite;
        }

        .wave:nth-child(2) {
            animation-duration: 15s;
            opacity: 0.05;
            bottom: 10px;
        }

        .wave:nth-child(3) {
            animation-duration: 25s;
            opacity: 0.07;
            bottom: 20px;
        }

        @keyframes wave-animation {
            0% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(-50%);
            }
        }

        /* Efek partikel */
        .particles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
        }

        .particle {
            position: absolute;
            background: rgba(32, 156, 238, 0.3);
            border-radius: 50%;
            animation: float 15s infinite linear;
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0) translateX(0);
            }
            25% {
                transform: translateY(-20px) translateX(10px);
            }
            50% {
                transform: translateY(-10px) translateX(20px);
            }
            75% {
                transform: translateY(-30px) translateX(-10px);
            }
        }

        /* Container login */
        .login-container {
            width: 100%;
            max-width: 420px;
            background: rgba(10, 15, 25, 0.7);
            backdrop-filter: blur(12px);
            border-radius: 20px;
            padding: 40px 35px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(64, 156, 255, 0.1);
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .login-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, #209cee, #0a5a9c, #209cee);
            z-index: 2;
        }

        .login-header {
            text-align: center;
            margin-bottom: 35px;
        }

        .login-header h2 {
            font-size: 32px;
            font-weight: 700;
            background: linear-gradient(90deg, #64b5f6, #209cee, #0d8bf2);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }

        .login-header p {
            color: #8da1c7;
            font-size: 15px;
        }

        /* Form styling */
        .login-form {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        .input-group {
            position: relative;
        }

        .input-group i {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: #64b5f6;
            font-size: 18px;
            z-index: 1;
        }

        .input-group input {
            width: 100%;
            padding: 16px 20px 16px 52px;
            background: rgba(15, 25, 45, 0.6);
            border: 1px solid rgba(64, 156, 255, 0.2);
            border-radius: 12px;
            font-size: 16px;
            color: #e0e7ff;
            transition: all 0.3s ease;
            outline: none;
        }

        .input-group input:focus {
            border-color: #209cee;
            box-shadow: 0 0 0 2px rgba(32, 156, 238, 0.2);
            background: rgba(15, 25, 45, 0.8);
        }

        .input-group input::placeholder {
            color: #6a7fa0;
        }

        /* Remember me & forgot password */
        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            margin-top: 5px;
        }

        .remember-me {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #8da1c7;
            cursor: pointer;
        }

        .remember-me input {
            accent-color: #209cee;
        }

        .forgot-password {
            color: #64b5f6;
            text-decoration: none;
            transition: color 0.2s;
        }

        .forgot-password:hover {
            color: #209cee;
            text-decoration: underline;
        }

        /* Submit button */
        .submit-btn {
            background: linear-gradient(90deg, #0d8bf2, #209cee, #0a5a9c);
            color: white;
            border: none;
            padding: 17px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .submit-btn:hover {
            background: linear-gradient(90deg, #0a5a9c, #0d8bf2, #209cee);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(32, 156, 238, 0.3);
        }

        .submit-btn:active {
            transform: translateY(0);
        }

        /* Error message */
        .error-message {
            background: rgba(220, 53, 69, 0.15);
            border-left: 4px solid #dc3545;
            color: #f8a5b0;
            padding: 12px 15px;
            border-radius: 6px;
            font-size: 14px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
            animation: fadeIn 0.5s ease;
        }

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

        .error-message i {
            font-size: 18px;
        }

        /* Sign up link */
        .signup-link {
            text-align: center;
            margin-top: 25px;
            color: #8da1c7;
            font-size: 15px;
        }

        .signup-link a {
            color: #64b5f6;
            text-decoration: none;
            font-weight: 600;
            margin-left: 5px;
            transition: color 0.2s;
        }

        .signup-link a:hover {
            color: #209cee;
            text-decoration: underline;
        }
        /* Responsive design */
        @media (max-width: 480px) {
            .login-container {
                padding: 30px 25px;
                max-width: 90%;
            }
            
            .login-header h2 {
                font-size: 28px;
            }
            
            .form-options {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }
        }

            .password-toggle {
            position: absolute;
            right: 25px;
            top: 50%;
            transform: translateY(-50%);
            color: #8da1c7;
            cursor: pointer;
            font-size: 18px;
            z-index: 2;
            background: transparent;
            border: none;
            padding: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .password-toggle:hover {
            color: #64b5f6;
        }