/* --- Material Design 3 色彩系统 --- */
:root {
    /* 日间模式 - MD3 配色 (基于紫色色调) */
    --md-sys-color-primary: #6750A4;
    --md-sys-color-on-primary: #FFFFFF;
    --md-sys-color-primary-container: #EADDFF;
    --md-sys-color-on-primary-container: #21005D;

    --md-sys-color-secondary: #625B71;
    --md-sys-color-on-secondary: #FFFFFF;
    --md-sys-color-secondary-container: #E8DEF8;
    --md-sys-color-on-secondary-container: #1D192B;

    --md-sys-color-tertiary: #7D5260;
    --md-sys-color-on-tertiary: #FFFFFF;
    --md-sys-color-tertiary-container: #FFD8E4;
    --md-sys-color-on-tertiary-container: #31111D;

    --md-sys-color-background: #FFFBFE;
    --md-sys-color-on-background: #1C1B1F;

    --md-sys-color-surface: #FFFBFE;
    --md-sys-color-on-surface: #1C1B1F;
    --md-sys-color-surface-variant: #E7E0EC;
    --md-sys-color-on-surface-variant: #49454F;

    --md-sys-color-outline: #79747E;
    --md-sys-color-outline-variant: #CAC4D0;

    --md-sys-color-inverse-surface: #313033;
    --md-sys-color-inverse-on-surface: #F4EFF4;

    --md-sys-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
    --md-sys-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
    --md-sys-elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px 0px rgba(0, 0, 0, 0.3);

    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px;
    --md-sys-shape-corner-extra-large: 28px;
    --md-sys-shape-corner-full: 9999px;

    --transition-speed: 0.3s;
}

/* 夜间模式 - MD3 配色 */
body.dark-mode {
    --md-sys-color-primary: #D0BCFF;
    --md-sys-color-on-primary: #381E72;
    --md-sys-color-primary-container: #4F378B;
    --md-sys-color-on-primary-container: #EADDFF;

    --md-sys-color-secondary: #CCC2DC;
    --md-sys-color-on-secondary: #332D41;
    --md-sys-color-secondary-container: #4A4458;
    --md-sys-color-on-secondary-container: #E8DEF8;

    --md-sys-color-tertiary: #EFB8C8;
    --md-sys-color-on-tertiary: #492532;
    --md-sys-color-tertiary-container: #633B48;
    --md-sys-color-on-tertiary-container: #FFD8E4;

    --md-sys-color-background: #1C1B1F;
    --md-sys-color-on-background: #E6E1E5;

    --md-sys-color-surface: #1C1B1F;
    --md-sys-color-on-surface: #E6E1E5;
    --md-sys-color-surface-variant: #49454F;
    --md-sys-color-on-surface-variant: #CAC4D0;

    --md-sys-color-outline: #938F99;
    --md-sys-color-outline-variant: #49454F;

    --md-sys-color-inverse-surface: #E6E1E5;
    --md-sys-color-inverse-on-surface: #313033;

    --md-sys-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
    --md-sys-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
    --md-sys-elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px 0px rgba(0, 0, 0, 0.3);
}

/* --- 基础重置 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- 悬浮切换按钮 (固定圆形) --- */
.theme-btn-floating {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: var(--md-sys-shape-corner-full);
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border: none;
    cursor: pointer;
    box-shadow: var(--md-sys-elevation-3);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed);
    z-index: 1000;
}

.theme-btn-floating:hover {
    box-shadow: var(--md-sys-elevation-3);
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
}

.theme-btn-floating:active {
    transform: scale(0.95);
}

/* --- 主体内容 --- */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 24px 24px 24px;
    flex: 1;
    width: 100%;
}

.hero {
    text-align: center;
    padding: 2rem 0 4rem 0;
    animation: fadeIn 1s ease-in;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

/* 名字徽章 - 圆角矩形框 */
.name-badge {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    padding: 16px 32px;
    border-radius: var(--md-sys-shape-corner-extra-large);
    box-shadow: var(--md-sys-elevation-1);
}

.avatar {
    width: 64px;
    height: 64px;
    border-radius: var(--md-sys-shape-corner-full);
    object-fit: cover;
    border: 3px solid var(--md-sys-color-primary);
    background-color: var(--md-sys-color-surface);
}

.name-badge h1 {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: -0.25px;
    margin: 0;
    white-space: nowrap;
}

/* 尚未完工提示框 */
.wip-box {
    border: 2px solid var(--md-sys-color-outline);
    color: var(--md-sys-color-on-surface-variant);
    padding: 12px 32px;
    border-radius: var(--md-sys-shape-corner-medium);
    font-weight: 500;
    font-size: 1rem;
    background-color: transparent;
    transition: all var(--transition-speed);
}

.wip-box:hover {
    border-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-primary);
    background-color: var(--md-sys-color-primary-container);
}

/* --- 底部 --- */
footer {
    text-align: center;
    padding: 24px;
    background-color: transparent;
    margin-top: auto;
}

.site-uptime {
    background-color: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-on-surface-variant);
    display: inline-block;
    padding: 12px 20px;
    border-radius: var(--md-sys-shape-corner-extra-large);
    font-size: 0.875rem;
    font-weight: 500;
}

/* --- 动画 --- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- 移动端适配 --- */
@media (max-width: 600px) {
    .name-badge {
        flex-direction: column;
        padding: 20px 24px;
        gap: 12px;
    }

    .avatar {
        width: 56px;
        height: 56px;
    }

    .name-badge h1 {
        font-size: 1.25rem;
        white-space: normal;
        text-align: center;
    }

    .theme-btn-floating {
        bottom: 16px;
        right: 16px;
    }

    .container {
        padding: 3rem 16px 16px 16px;
    }
}