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

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #000;
    color: #fff;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 40px;
    background: rgba(0, 0, 0, 0.8);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.neon-logo {
    text-align: center;
    margin-bottom: 40px;
}

.neon-logo i {
    font-size: 60px;
    color: #fff;
    text-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px #fff;
    margin-bottom: 15px;
}

.neon-logo h1 {
    font-size: 28px;
    font-weight: 500;
    color: #fff;
    text-shadow: 0 0 5px #fff, 0 0 10px #fff;
    letter-spacing: 2px;
}

.login-form {
    display: flex;
    flex-direction: column;
}

.input-group {
    margin-bottom: 25px;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 16px;
    color: #fff;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

.input-group label i {
    margin-right: 8px;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    background: transparent;
    border: none;
    border-bottom: 2px solid #fff;
    color: #fff;
    font-size: 16px;
    outline: none;
    transition: all 0.3s;
}

.input-group input:focus {
    border-bottom: 2px solid #fff;
    box-shadow: 0 1px 0 0 #fff, 0 0 10px 0 rgba(255, 255, 255, 0.8);
}

.neon-button {
    position: relative;
    background: transparent;
    color: #fff;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    margin-top: 20px;
    overflow: hidden;
    transition: 0.5s;
    border-radius: 5px;
}

.neon-button:hover {
    background: #fff;
    color: #000;
    box-shadow: 0 0 5px #fff,
                0 0 25px #fff,
                0 0 50px #fff,
                0 0 100px #fff;
}

.neon-button span {
    position: absolute;
    display: block;
}

.neon-button span:nth-child(1) {
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #fff);
    animation: btn-anim1 1.5s linear infinite;
}

@keyframes btn-anim1 {
    0% {
        left: -100%;
    }
    50%,100% {
        left: 100%;
    }
}

.neon-button span:nth-child(2) {
    top: -100%;
    right: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent, #fff);
    animation: btn-anim2 1.5s linear infinite;
    animation-delay: 0.375s;
}

@keyframes btn-anim2 {
    0% {
        top: -100%;
    }
    50%,100% {
        top: 100%;
    }
}

.neon-button span:nth-child(3) {
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(270deg, transparent, #fff);
    animation: btn-anim3 1.5s linear infinite;
    animation-delay: 0.75s;
}

@keyframes btn-anim3 {
    0% {
        right: -100%;
    }
    50%,100% {
        right: 100%;
    }
}

.neon-button span:nth-child(4) {
    bottom: -100%;
    left: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(360deg, transparent, #fff);
    animation: btn-anim4 1.5s linear infinite;
    animation-delay: 1.125s;
}

@keyframes btn-anim4 {
    0% {
        bottom: -100%;
    }
    50%,100% {
        bottom: 100%;
    }
}

.extra-links {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

.extra-links a {
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    transition: 0.3s;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

.extra-links a:hover {
    color: #fff;
    text-shadow: 0 0 10px #fff, 0 0 20px #fff;
}

/* Responsive Tasarım */
@media (max-width: 480px) {
    .login-container {
        padding: 30px 20px;
        margin: 0 15px;
    }
    
    .neon-logo i {
        font-size: 50px;
    }
    
    .neon-logo h1 {
        font-size: 24px;
    }
    
    .input-group input {
        padding: 10px 12px;
    }
    
    .neon-button {
        padding: 12px 25px;
    }
}