/* 深色模式变量 */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --nav-bg: #343a40;
    --nav-text: #1E5572;
    --nav-hover: #000000;
    --loading-bg: rgba(255, 255, 255, 0.9);
}

/* Edge深色模式适配 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --nav-bg: #2d2d2d;
        --nav-text: #1c1d1e;
        --nav-hover: #ffffff;
        --loading-bg: rgba(26, 26, 26, 0.9);
    }

    body {
        background-color: var(--bg-color);
        color: var(--text-color);
    }

    /* 导航栏深色模式 */
    .custom-nav-bg {
        background-color: var(--nav-bg);
    }

    .nav-item .nav-link {
        color: var(--nav-text) !important;
    }

    .nav-item .nav-link.dropdown-toggle:hover {
        color: var(--nav-hover) !important;
    }

    /* Loading动画深色模式 */
    .loading-container {
        background-color: var(--loading-bg);
    }

    /* 文字颜色适配 */

    .s3_2_div,
    .s3_3_div span,
    .s5_div_cards span {
        color: #6e6969 !important;
    }

    /* 背景图片在深色模式下的处理 */

    /* 卡片和容器深色模式 */
    .bd-callout {
        background-color: #2d2d2d;
        border-color: #404040;
        color: var(--text-color);
    }

    /* 链接颜色 */
    a {
        color: var(--nav-text);
    }

    a:hover {
        color: var(--nav-hover);
    }

    /* Footer深色模式 */
    footer {
        background-color: var(--nav-bg);
        color: var(--text-color);
    }

    footer a {
        color: var(--text-color);
    }

    footer a:hover {
        color: var(--nav-hover);
    }

    /* 深色模式下的特殊处理 */


/* Description页面样式已移至 description.css */
}

body { padding-top: 56px; }
body, html {
    overflow-x: hidden;
    max-width: 100%;
    background-color: var(--bg-color);
    color: var(--text-color);
}
.left-aligned { margin-left: auto; }
.middle-aligned { margin: 0 auto; }
.bg-dark { background-color: #343a40 !important; }
.bg-hero { background-color: #45b06cff; }

/* CALLOUT */
.bd-callout { padding:1.25rem; margin-top:1.25rem; margin-bottom:1.25rem; border:1px solid #e9ecef; border-left-width:.25rem; border-radius:.25rem }
.bd-callout h4 { margin-bottom: 1.25rem }
.bd-callout p:last-child { margin-bottom:0 }
.bd-callout code { border-radius:.25rem }
.bd-callout+.bd-callout { margin-top:-.25rem }
.bd-callout-info { border-left-color:#5bc0de }
.bd-callout-warning { border-left-color:#f0ad4e }
.bd-callout-danger { border-left-color:#d9534f }

.container-fluid {
  padding-left: 0;
  padding-right: 0;
}

/* nav 背景图 */
.custom-nav-bg {
  background-image: url('https://static.igem.wiki/teams/5721/img/nav-bg.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  height: 78px;
}

.nav-logo {
  width: 72px;
  height: 66px;
}

/* 下拉菜单触发器文字颜色 */
.nav-item .nav-link {
  font-weight: 200;
  font-family: Arial;
  font-weight: 400;
  font-size: 18px;
  color: var(--nav-text);
}

/* 悬停时变深灰色 */
.nav-item .nav-link.dropdown-toggle:hover {
  color: var(--nav-hover) !important;
}

/* Home页面样式已移至 home.css */

/* Loading动画样式 */
.loading-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--loading-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

/* 返回顶部按钮样式 */
.to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 45px;
    width: 84px;
    height: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease-in-out;
}

.to-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.to-top-btn:hover {
    transform: translateY(-2px) scale(1.05);
}

.to-top-btn img {
    width: 84px;
    height: 70px;
}

.loading-container.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-image {
    width: min(800px, 90vw);
    height: auto;
    max-height: 600px;
    object-fit: contain;
    animation: loadingPulse 2s ease-in-out infinite;
}

@keyframes loadingPulse {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}


/* Description页面样式已移至 description.css */

/* Members页面样式已移至 members.css */

/* footer */
footer a { color: rgb(25, 25, 25); text-decoration: none; }
footer a:hover { color: rgb(25, 25, 25); text-decoration: underline; }

.footer-bg {
  background-image: url('https://static.igem.wiki/teams/5721/img/footer-bottom.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  height: 339px;
}