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

:root {
    /* 颜色 */
    --color-primary-light: rgb(240, 128, 128);
    --color-primary: rgb(220, 90, 90);
    --color-primary-dark: rgb(200, 60, 60);

    --color-secondary-light: rgb(255, 182, 182); /* 较淡的粉色 */
    --color-secondary: rgb(255, 140, 140); /* 中等粉色 */
    --color-secondary-dark: rgb(255, 105, 105); /* 较深的粉色 */

    --color-text-light: rgb(255, 255, 255);
    --color-text: rgb(180, 180, 180);
    --color-text-dark: rgb(80, 80, 80);

    --color-bg-light: rgb(50, 50, 50);
    --color-bg: rgb(30, 30, 30);
    --color-bg-dark: rgb(23, 23, 23);

    /* 字体 */
    --font-size-sm: 12px;
    --font-size: 14px;
    --font-size-md: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 24px;
    --font-size-xxl: 48px;

    /* 间隙 */
    --gap-size-quarter: calc(var(--gap-size) / 4); /* 四分之一间隙 */
    --gap-size-third: calc(var(--gap-size) / 3); /* 三分之一间隙 */
    --gap-size-half: 10px; /* 单个间隙 */
    --gap-size: 20px;      /* 标准间隙 */

    --box-shadow: none;

    .svg {
        filter: invert(1);
    }
}

.light-mode {
    --color-text-light: rgb(30, 30, 30);
    --color-text: rgb(50, 50, 50);
    --color-text-dark: rgb(80, 80, 80);
    
    --color-bg-light: rgb(214, 214, 214);
    --color-bg: rgb(228, 228 ,228);
    --color-bg-dark: rgb(241, 241, 241);

    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);


    .svg {
        filter: invert(0);
    }
}

@font-face {
    font-family: 'Material Icons';
    src: url(/asset/font/material-icons.woff2) format('woff2');
}

.icon {
    padding: 0;
    margin: 0;
    font-family: 'Material Icons';
    font-weight: normal;
    font-style: normal;
    font-size: 20px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    font-feature-settings: 'liga';
    -webkit-font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
}

body,
html {
    display: flex;
    width: 100%;
    height: 100%;
    font-size: var(--font-size);
    font-family: Arial, Helvetica, sans-serif;
    color: var(--color-text-light);
    background-color: var(--color-bg);
    flex-wrap: wrap;
    overflow-y: auto;
    overflow-x: hidden;
}

img {
    -webkit-user-drag: none;
}

button {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    font-size: 14px;
    line-height: 14px;
    color: var(--color-text-light);
    border: none;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
    -webkit-user-select: none;  /* Safari */
    -moz-user-select: none;     /* Firefox */
    -ms-user-select: none;      /* Internet Explorer/Edge */
    user-select: none;          /* Standard */

    background-color: var(--color-bg-dark);

    &.btn {
        background-color: var(--color-primary-light);
        .icon {
            margin-right: 5px;
        }
    }

    &:hover {
        background-color: var(--color-primary);
    }
    
    &:active {
        background-color: var(--color-primary-dark);
    }

    &.btn {
        padding: 15px;
        border-radius: 25px;
        height: 50px;
    }
}

a {
    border: none;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: background-color 0.3s, color 0.3s;
    -webkit-user-select: none;  /* Safari */
    -moz-user-select: none;     /* Firefox */
    -ms-user-select: none;      /* Internet Explorer/Edge */
    user-select: none;          /* Standard */

    color: var(--color-secondary-light);

    &:hover {
        color: var(--color-secondary);
    }
    &:active {
        color: var(--color-secondary-dark);
    }

    &.btn {
        color: var(--color-text);

        &:hover {
            background-color: var(--color-primary);
        }

        &:active {
            background-color: var(--color-primary-dark);
        }
    }
}

main {
    width: 100%;

    canvas {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        z-index: 0;
        pointer-events: none;
    }
}

.index {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100vh;
    gap: var(--gap-size);

    .slogan {
        position: relative;
        font-size: var(--font-size-xxl);
        font-weight: bold;

        background: linear-gradient(265.99deg, var(--color-text-light), var(--color-primary));
        background-clip: text;
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        user-select: none;


        cursor: default;
    }
    .description {
        position: relative;
        color: var(--color-text-dark);
        font-size: var(--font-size-md);
        user-select: none;
    }

    a {
        background-color: var(--color-primary-light);
        padding: 10px 20px;
        color: var(--color-text-light);
        border-radius: 10px;
        position: relative;
    }
}

.logo {
    position: relative;
    font-size: var(--font-size-xl);
    font-weight: bold;
    color: var(--color-text-light);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--gap-size-half);
    cursor: default;
    user-select: none;

    img {
        width: 24px;
        height: 24px;
    }
}

.oauth {
    display: flex;
    flex-direction: column;
    gap: var(--gap-size);

    a {
        position: relative;
        display: flex;
        justify-content: center;
        gap: var(--gap-size-quarter);
        min-width: 100px;
        padding: 14px;
        color: var(--color-text);
        background-color: var(--color-oauth-bg);
        border: 1px solid;
        border-color: var(--color-bg-light);
        border-radius: 50px;
        
        &:hover {
            background-color: var(--color-oauth-bg);
            border-color: var(--color-primary-dark);
        }
        
        &:active {
            background-color: var(--color-primary);
        }
        
        &.active {
            background-color: var(--color-oauth-bg);
            border-color: var(--color-primary-light);
            pointer-events: none;
        }

        img {
            position: absolute;
            top: 12px;
            left: 12px;
            width: 24px;
            height: 24px;
        }
    }
}

footer {
    width: 100%;
    margin-top: auto;
    padding: 20px 100px 20px 20px;
    color: var(--color-text-dark);
    font-size: var(--font-size-sm);
    display: flex;
    flex-direction: row;
    gap: var(--gap-size-half);

    .copyright {
        display: flex;
        flex-direction: row;
        gap: var(--gap-size-quarter);
        align-items: center;
        height: 40px;

        a {
            display: flex;
            align-items: center;
        }
    }

    .link {
        display: flex;
        flex-direction: row;
        gap: var(--gap-size-half);
        align-items: center;
        height: 40px;
        margin-left: var(--gap-size-quarter);
    }

    .social {
        display: flex;
        flex-direction: row;
        gap: var(--gap-size-half);
        align-items: center;
        margin-left: auto;
        
        a {
            display: flex;
            gap: 5px;
            background-color: var(--color-bg-dark);
            box-shadow: var(--box-shadow);
            padding: 10px;
            border-radius: 10px;
            align-items: center;
            
            img {
                width: 20px;
                height: 20px;
            }
        }
        .switch {
            padding: 10px;
            border-radius: 50%;
            box-shadow: var(--box-shadow);
        }
    }
}

/* 404 */
.error {
    background-color: var(--color-bg-dark);
    color: #858585;
    display: flex;
    width: 100%;
    height: 100%;
    align-items: center;
    justify-content: center;
    user-select: none;
    line-height: 1;

    main {
        display: flex;
        flex-direction: column;
        gap: 10px;
        width: 100%;
        text-align: center;

        & div:first-child {
            font-size: 72px;
            font-weight: bold;
        }

        & div:nth-child(2){
            font-size: 24px;
        }

        a {
            margin-top: 10px;
        }
    }
    footer {
        display: none;
    }
}

/* 用户服务协议 */
.prose {
    background-color: var(--color-bg);
    line-height: 1.6;
    color: var(--color-text-dark);
    margin: 20px;

    h1, h2 {
        color: var(--color-text);
    }

    p {
        margin: 10px 0;
    }

    ul {
        margin: 10px 0;
        padding-left: 20px;
    }
}

@media (max-width: 1024px) {
    footer {
        flex-direction: column-reverse;
        padding: 20px;
        gap: 0;

        .social {
            margin-left: 0;
        }
    }
}