/* style.css - Dark theme styles */
body {
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: #ffffff;
    margin: 0;
    padding: 80px 40px 20px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
    overflow: hidden;
    position: relative;
}

/* Snow effect */
.snow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.snowflake {
    position: absolute;
    background-color: #ffffff;
    border-radius: 50%;
    opacity: 0.8;
    animation: fall linear infinite;
}

.snowflake:nth-child(odd) {
    animation-duration: 10s;
    animation-delay: -5s;
}

.snowflake:nth-child(even) {
    animation-duration: 15s;
    animation-delay: -10s;
}

@keyframes fall {
    0% {
        transform: translateY(-10px) rotate(0deg);
        opacity: 0;
    }
    10% {
        transform: translateY(10vh) rotate(36deg);
        opacity: 1;
    }
    20% {
        transform: translateY(20vh) rotate(72deg);
        opacity: 1;
    }
    30% {
        transform: translateY(30vh) rotate(108deg);
        opacity: 1;
    }
    40% {
        transform: translateY(40vh) rotate(144deg);
        opacity: 1;
    }
    50% {
        transform: translateY(50vh) rotate(180deg);
        opacity: 1;
    }
    60% {
        transform: translateY(60vh) rotate(216deg);
        opacity: 1;
    }
    70% {
        transform: translateY(70vh) rotate(252deg);
        opacity: 1;
    }
    80% {
        transform: translateY(80vh) rotate(288deg);
        opacity: 1;
    }
    90% {
        transform: translateY(90vh) rotate(324deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #1e1e1e;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

header h1 {
    margin: 0;
    font-size: 1.5em;
    color: #ffffff;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 500px;
}

.login, .welcome {
    text-align: center;
    background-color: #1e1e1e;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    width: 100%;
}

.login h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.login h2 {
    font-size: 1.5em;
    margin-bottom: 20px;
}

.keypad {
    margin-top: 20px;
}

.display {
    font-size: 3em;
    margin-bottom: 20px;
    background-color: #333;
    padding: 15px;
    border-radius: 10px;
    letter-spacing: 0.5em;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.key {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 20px;
    font-size: 1.5em;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.key:hover {
    background-color: #555;
}

.clear {
    grid-column: span 2;
}

.enter {
    background-color: #4CAF50;
}

.enter:hover {
    background-color: #45a049;
}

.rules {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    margin-top: 20px;
}

.rules:hover {
    background-color: #d32f2f;
}

.welcome h1 {
    margin-top: 0;
}

.logout {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
}

.logout:hover {
    background-color: #d32f2f;
}

/* Mobile responsiveness */
@media (max-width: 600px) {
    header h1 {
        font-size: 1.2em;
    }
    
    .logout {
        padding: 6px 10px;
        font-size: 0.8em;
    }
    
    .login h2 {
        font-size: 1.2em;
    }
    
    .key {
        padding: 15px;
        font-size: 1.2em;
    }
    
    .display {
        font-size: 2em;
        padding: 10px;
    }
    
    .login, .welcome {
        padding: 20px;
    }
}