/**
 * 主题: 纸鸢图床ZIH
 * 开发者: 白木
 * 开发者的博客: https://gl.baimu.live/
 *
 * 🦶 页脚样式 - 涟漪展开效果
 *
 * @package Zhiyuan_Imgzus
 */

/* ===== 🔘 触发按钮 ===== */
.footer-trigger {
    position: fixed;
    bottom: 5rem;
    right: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-panel);
    backdrop-filter: blur(0.75rem);
    border: 0.0625rem solid rgba(14, 165, 233, 0.3);
    border-radius: var(--radius-lg);
    color: var(--neon-primary);
    cursor: pointer;
    z-index: 100;
    transition: all 0.3s ease;
    box-shadow:
        0 0.25rem 1rem rgba(0, 0, 0, 0.3),
        0 0 1rem rgba(14, 165, 233, 0.1);
}

.footer-trigger:hover {
    background: rgba(14, 165, 233, 0.1);
    box-shadow:
        0 0.25rem 1rem rgba(0, 0, 0, 0.3),
        0 0 1.5rem rgba(14, 165, 233, 0.3);
    transform: translateY(-0.125rem);
}

.trigger-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
}

.trigger-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

.trigger-text {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===== 📋 涟漪展开容器 ===== */
.footer-ripple-container {
    position: fixed;
    inset: 0;
    z-index: 9998;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100%;
    padding-top: 4rem;
    padding-bottom: 2rem;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.footer-ripple-container.active {
    opacity: 1;
    visibility: visible;
}

/* ===== 🌊 涟漪背景 ===== */
.footer-ripple-bg {
    position: fixed;
    bottom: 5rem;
    right: 1.5rem;
    width: 3rem;
    height: 3rem;
    background: var(--bg-panel);
    backdrop-filter: blur(1rem) saturate(180%);
    border-radius: 50%;
    transform: scale(0);
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow:
        0 0 0 0.0625rem rgba(14, 165, 233, 0.2),
        inset 0 0 0 0.0625rem rgba(255, 255, 255, 0.05);
    /* 🎯 精准定位：与触发按钮相同的 bottom 和 right 值 */
    /* 触发按钮尺寸：padding 0.75rem 1.25rem，内容约 3rem x 1.5rem */
    /* 圆点居中在按钮中心 */
    margin-bottom: 0.375rem;
    margin-right: 0.625rem;
}

.footer-ripple-container.active .footer-ripple-bg {
    transform: scale(80);
}

/* ===== 📝 页脚内容 ===== */
.footer-content {
    position: relative;
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    margin-top: auto;
    transform: translateY(100%);
    opacity: 0;
    transition: opacity 0.4s ease 0.25s, transform 0.4s ease 0.25s;
    z-index: 1;
    flex-shrink: 0;
}

.footer-ripple-container.active .footer-content {
    transform: translateY(0);
    opacity: 1;
}

/* ===== ❌ 关闭按钮 ===== */
.footer-close {
    position: absolute;
    top: 0;
    right: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 0.0625rem solid var(--border-light);
    border-radius: var(--radius-full);
    color: var(--text-white-50);
    cursor: pointer;
    transition: all 0.3s ease;
}

.footer-close:hover {
    background: rgba(255, 42, 109, 0.1);
    border-color: var(--neon-secondary);
    color: var(--neon-secondary);
}

.footer-close svg {
    width: 1.25rem;
    height: 1.25rem;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

/* ===== 🏷️ 页脚内部布局 ===== */
.footer-inner {
    text-align: center;
}

.footer-brand {
    margin-bottom: 1.5rem;
}

.footer-logo {
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: center;
}

.footer-logo-img {
    display: block;
    height: 1.75rem;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 0 0.625rem rgba(14, 165, 233, 0.8))
            drop-shadow(0 0 1.25rem rgba(14, 165, 233, 0.5));
}

.footer-desc {
    color: var(--text-white-60);
    font-size: 0.875rem;
    line-height: 1.6;
    max-width: 520px;
    margin: 0 auto;
    white-space: normal;
}

.footer-links {
    margin-bottom: 1.5rem;
}

.footer-menu {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 1.5rem;
}

.footer-menu a {
    color: var(--text-white-50);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-menu a:hover {
    color: var(--neon-primary);
}

.footer-copyright {
    color: var(--text-white-40);
    font-size: 0.75rem;
}

/* ===== 🗂️ 页脚分类卡片（淡雅赛博朋克 doc-card 风格） ===== */
.footer-ripple-container > .footer-categories {
    position: relative;
    width: 100%;
    max-width: 52rem;
    padding: 0 var(--cp-space-xl);
    margin-bottom: var(--cp-space-md);
    transform: translateY(-1rem);
    opacity: 0;
    transition: opacity var(--cp-duration-slow) var(--cp-ease-out) 0.15s,
                transform var(--cp-duration-slow) var(--cp-ease-out) 0.15s;
    z-index: 1;
    flex-shrink: 0;
}

.footer-ripple-container.active > .footer-categories {
    transform: translateY(0);
    opacity: 1;
}

.footer-categories {
    text-align: left;
}

.footer-categories-header {
    text-align: center;
    margin-bottom: var(--cp-space-lg);
}

.footer-categories-title {
    position: relative;
    display: inline-block;
    margin: 0;
    font-family: var(--cp-font-title);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cp-color-gray-800);
    letter-spacing: 0.08em;
}

.footer-categories-title::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 3.75rem;
    height: 0.25rem;
    background: var(--cp-gradient-primary);
    border-radius: var(--cp-radius-pill);
    box-shadow: 0 0 0.625rem rgba(var(--cp-primary-rgb), 0.35);
}

.footer-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
    gap: var(--cp-space-md);
}

.footer-category-card {
    --cp-category-body-bg: rgba(var(--cp-white-rgb), 0.9);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--cp-gradient-glass);
    backdrop-filter: blur(1.25rem);
    -webkit-backdrop-filter: blur(1.25rem);
    border: var(--cp-border-neon-cyan);
    border-radius: var(--cp-radius-xl);
    box-shadow: var(--cp-shadow-glass), var(--cp-shadow-neon-cyan);
    transition: transform var(--cp-duration-normal) var(--cp-ease-out),
                box-shadow var(--cp-duration-normal) var(--cp-ease-out),
                border-color var(--cp-duration-normal) var(--cp-ease-out);
    margin-bottom: 0.5rem;
    animation: footerCategoryReveal var(--cp-duration-slow) var(--cp-ease-out-expo) var(--reveal-delay, 0ms) both;
}

.footer-ripple-container.active .footer-category-card {
    animation-name: footerCategoryReveal;
}

.footer-category-card:hover {
    transform: translateY(-0.5rem);
    border-color: rgba(var(--cp-primary-rgb), 0.5);
    box-shadow: var(--cp-shadow-glass-elevated), var(--cp-shadow-neon-cyan);
}

.footer-category-cover {
    position: relative;
    z-index: 1;
}

.footer-category-media {
    position: relative;
    height: 7.75rem;
    overflow: hidden;
    background: var(--cp-gradient-neon-cyan);
    -webkit-mask-image: var(--cp-wave-mask);
    mask-image: var(--cp-wave-mask);
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
}

.footer-category-media img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% + 1rem);
    object-fit: cover;
    object-position: center top;
    transition: transform var(--cp-duration-slow) var(--cp-ease-out);
}

.footer-category-card:hover .footer-category-media img {
    transform: scale(1.05);
}

.footer-category-fallback {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cp-gradient-neon-cyan);
}

.footer-category-fallback-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    background: var(--cp-gradient-glass);
    backdrop-filter: blur(0.625rem);
    -webkit-backdrop-filter: blur(0.625rem);
    border: var(--cp-border-glass);
    border-radius: var(--cp-radius-lg);
    box-shadow: var(--cp-shadow-glass);
    font-family: var(--cp-font-title);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--cp-color-primary);
}

.footer-category-badge {
    position: absolute;
    top: var(--cp-space-sm);
    left: var(--cp-space-sm);
    z-index: 2;
    padding: var(--cp-space-xs) var(--cp-space-md);
    background: var(--cp-gradient-primary);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    border-radius: var(--cp-radius-pill);
    box-shadow: 0 0.125rem 0.625rem rgba(var(--cp-primary-rgb), 0.35);
    max-width: calc(100% - var(--cp-space-lg));
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.footer-category-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 20%, rgba(var(--cp-primary-rgb), 0.08) 70%, rgba(var(--cp-primary-rgb), 0.18) 100%);
    pointer-events: none;
    z-index: 1;
}

.footer-category-body {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: var(--cp-space-xs);
    margin-top: -1.375rem;
    padding: calc(var(--cp-space-md) + 0.875rem) var(--cp-space-md) var(--cp-space-md);
    background: var(--cp-category-body-bg);
}

.footer-category-body::before {
    content: '';
    position: absolute;
    top: 0.625rem;
    left: 15%;
    right: 15%;
    height: 0.125rem;
    background: linear-gradient(90deg, transparent, rgba(var(--cp-primary-rgb), 0.35), transparent);
    border-radius: var(--cp-radius-pill);
    opacity: 0.55;
    pointer-events: none;
}

.footer-category-name {
    margin: 0;
    font-family: var(--cp-font-title);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cp-color-gray-800);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--cp-duration-normal) var(--cp-ease-out),
                text-shadow var(--cp-duration-normal) var(--cp-ease-out);
}

.footer-category-card:hover .footer-category-name {
    color: var(--cp-color-primary-dark);
    text-shadow: 0 0 0.625rem rgba(var(--cp-primary-rgb), 0.35);
}

.footer-category-desc {
    margin: 0;
    font-size: 0.75rem;
    line-height: 1.5;
    color: var(--cp-color-gray-600);
    text-align: center;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@keyframes footerCategoryReveal {
    from {
        opacity: 0;
        transform: translateY(1.25rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .footer-category-card {
        animation: none;
    }

    .footer-category-card:hover {
        transform: none;
    }

    .footer-category-card:hover .footer-category-media img {
        transform: none;
    }
}

html.no-animations .footer-category-card {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
}

html.no-animations .footer-category-card:hover,
html.no-animations .footer-category-card:hover .footer-category-media img {
    transform: none !important;
}

/* ===== 📱 响应式 ===== */
@media (max-width: 768px) {
    .footer-trigger {
        padding: 0.625rem 1rem;
    }

    .trigger-text {
        display: none;
    }

    .footer-content {
        padding: 1.5rem;
    }

    .footer-ripple-container {
        padding-top: 3rem;
    }

    .footer-ripple-container > .footer-categories {
        padding: 0 var(--cp-space-lg);
    }

    .footer-categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(8rem, 1fr));
        gap: var(--cp-space-sm);
    }

    .footer-category-media {
        height: 6.75rem;
    }

    .footer-category-body {
        margin-top: -1.125rem;
        padding-top: calc(var(--cp-space-md) + 0.75rem);
    }

    .footer-menu {
        flex-wrap: wrap;
        gap: 1rem;
    }
}

/* ===== 🚫 页面滚动锁定 ===== */
body.footer-open {
    overflow: hidden;
}