@font-face {
    font-family: 'Chalk';
    src: url('/data/Neat-Chalk.ttf') format('woff');
    font-weight: normal;
    font-style: normal;
}

* {
    font-family: Chalk, sans-serif;
}

:root {
    --initial-rotate: 0deg;
    --rotation-direction: 1;
    --random-delay: 0s;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #000;
    background-image: url('/data/blackboard.webp');
    background-size: cover;
    background-position: center;
}

@keyframes titleAnimation {
    0% {
        opacity: 0;
        transform: scale(0.5) rotate(var(--initial-rotate));
    }
    50% {
        opacity: 1;
        transform: scale(1.2) rotate(var(--initial-rotate));
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(var(--initial-rotate));
    }
}

@keyframes letterRotate {
    0%, 100% {
        transform: rotate(calc(var(--initial-rotate) * 1deg));
    }
    50% {
        transform: rotate(calc(var(--initial-rotate) + var(--rotation-direction) * 3deg));
    }
}

.game-title {
    font-size: 4rem;
    color: #fff;
    margin-bottom: 2rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.game-title span {
    opacity: 0;
    display: inline-block;
    animation: titleAnimation 0.4s forwards, letterRotate 2s infinite;
    animation-delay: calc(0.05s * var(--i)), var(--random-delay);
    animation-timing-function: ease-in-out;
}

.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    width: 500px;
    box-sizing: border-box;
}

.login-container input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 1.3rem;
    text-align: center;
}

.login-container select {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 1.3rem;
    text-align: center;
}

.login-container button {
    width: 100%;
    padding: 10px;
    background-color: #343434;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-sizing: border-box;
    font-size: 1.3rem;
}

.login-container button:hover {
    background-color: #3b3b3b;
}

.multi-button {
    width: 100%;
    margin-top: 1rem;
    background-color: #343434;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-sizing: border-box;
    font-size: 1.3rem;
}

.dual-button {
    padding-top: 1rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.message {
    font-size: 0.9rem;
    margin: 5px 0;
    height: auto;
    text-align: center;
    color: #fff;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.message.success {
    opacity: 1;
    color: #adff9e;
}

.message.error {
    opacity: 1;
    color: #ff9e9e;
}

@media (max-width: 480px) {
    .game-title {
        font-size: 2rem;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

    .game-title span:nth-child(8) {
        flex-basis: 100%;
        height: 0;
    }

    .login-container {
        width: 100%;
        padding: 0.5rem;
    }

    .login-container input, .login-container button, .login-container select {
        font-size: 0.9rem;
        padding: 6px;
    }
}