* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    overflow: hidden;
    font-family: Arial, sans-serif;
    background: url("wallpaper.jpg") no-repeat center center fixed;
    background-size: cover;
    color: white;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: -1;
}

.lock-screen {
    position: absolute;
    width: 100%;
    height: 100%;
    transition: transform 0.8s ease;
}

.lock-screen.slide-up {
    transform: translateY(-100%);
}

header {
    width: 100%;
    padding: 15px 30px;
}

.header-left {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.clock {
    position: absolute;
    bottom: 15%;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

#clock {
    font-size: 80px;
    font-weight: 500;
}

#date {
    font-size: 28px;
    margin-top: 10px;
}

.login-screen {
    position: absolute;
    bottom: -100%;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: bottom 0.8s ease;
}

.login-screen.show-login {
    bottom: 0;
}

.login-box {
    text-align: center;
    backdrop-filter: blur(15px);
    background: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 15px;
}

.login-box input {
    display: block;
    margin: 20px auto;
    padding: 10px;
    width: 250px;
    border: none;
    border-radius: 5px;
}

.login-box button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.shake {
    animation: shake 0.4s;
}

@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    50% { transform: translateX(8px); }
    75% { transform: translateX(-8px); }
    100% { transform: translateX(0); }
}