/* ================================================
   磁力种子搜索 - 内页统一样式
   Pure Neumorphism Design - Internal Pages
   ================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700&display=swap');

/* ========================================
   CSS 变量
   ======================================== */
:root {
    --neu-bg: #e0e5ec;
    --neu-shadow-dark: #a3b1c6;
    --neu-shadow-light: #ffffff;
    --text-primary: #31344b;
    --text-secondary: #5e6478;
    --text-muted: #8a91a8;
    --accent-primary: #e74c8d;
    --accent-secondary: #6c5ce7;

    --neu-shadow-convex: 8px 8px 16px var(--neu-shadow-dark), -8px -8px 16px var(--neu-shadow-light);
    --neu-shadow-convex-sm: 4px 4px 8px var(--neu-shadow-dark), -4px -4px 8px var(--neu-shadow-light);
    --neu-shadow-convex-lg: 12px 12px 24px var(--neu-shadow-dark), -12px -12px 24px var(--neu-shadow-light);
    --neu-shadow-concave: inset 4px 4px 8px var(--neu-shadow-dark), inset -4px -4px 8px var(--neu-shadow-light);
    --neu-shadow-concave-sm: inset 2px 2px 4px var(--neu-shadow-dark), inset -2px -2px 4px var(--neu-shadow-light);

    --radius-sm: 10px;
    --radius-md: 15px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 50px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

[data-theme="dark"] {
    --neu-bg: #2d3748;
    --neu-shadow-dark: #1a202c;
    --neu-shadow-light: #3d4a5c;
    --text-primary: #f7fafc;
    --text-secondary: #cbd5e0;
    --text-muted: #a0aec0;
}

/* ========================================
   重置与基础
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--neu-bg);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    transition: background 0.5s ease, color 0.3s ease;
}

::selection {
    background: var(--accent-primary);
    color: white;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--neu-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--neu-shadow-dark);
    border-radius: var(--radius-full);
}

/* ========================================
   背景装饰
   ======================================== */
.bg-decoration {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: var(--neu-bg);
    box-shadow: var(--neu-shadow-convex);
}

.circle-1 { width: 100px; height: 100px; top: 15%; left: 5%; opacity: 0.5; }
.circle-2 { width: 70px; height: 70px; top: 25%; right: 10%; opacity: 0.4; }
.circle-3 { width: 50px; height: 50px; bottom: 20%; left: 10%; opacity: 0.3; }

/* ========================================
   主题切换
   ======================================== */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    width: 45px;
    height: 45px;
    border: none;
    border-radius: 50%;
    background: var(--neu-bg);
    box-shadow: var(--neu-shadow-convex-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.theme-toggle:hover { box-shadow: var(--neu-shadow-convex); }
.theme-toggle:active { box-shadow: var(--neu-shadow-concave-sm); }

.theme-icon {
    position: absolute;
    font-size: 1.2rem;
    transition: all var(--transition-normal);
}

.light-icon { opacity: 1; transform: scale(1); }
.dark-icon { opacity: 0; transform: scale(0.5); }

[data-theme="dark"] .light-icon { opacity: 0; transform: scale(0.5); }
[data-theme="dark"] .dark-icon { opacity: 1; transform: scale(1); }

/* ========================================
   页面容器
   ======================================== */
.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 20px;
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

/* ========================================
   返回导航
   ======================================== */
.back-nav {
    width: 100%;
    margin-bottom: 20px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    background: var(--neu-bg);
    border-radius: var(--radius-full);
    box-shadow: var(--neu-shadow-convex-sm);
    transition: all var(--transition-normal);
}

.back-link:hover {
    box-shadow: var(--neu-shadow-convex);
    color: var(--accent-primary);
}

.back-link:active {
    box-shadow: var(--neu-shadow-concave-sm);
}

.back-link svg {
    width: 16px;
    height: 16px;
}

/* ========================================
   引擎头部
   ======================================== */
.engine-header {
    width: 100%;
    text-align: center;
    margin-bottom: 30px;
}

.engine-logo {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--neu-bg);
    border-radius: 50%;
    box-shadow: var(--neu-shadow-convex);
}

.engine-icon {
    font-size: 3rem;
}

.engine-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.engine-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* ========================================
   搜索卡片
   ======================================== */
.search-card {
    width: 100%;
    background: var(--neu-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--neu-shadow-convex-lg);
    padding: 40px 30px;
    margin-bottom: 30px;
}

.search-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    text-align: center;
}

.search-box {
    display: flex;
    align-items: stretch;
    margin-bottom: 20px;
}

.search-input {
    flex: 1;
    padding: 16px 24px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--neu-bg);
    border: none;
    border-radius: var(--radius-full) 0 0 var(--radius-full);
    box-shadow: var(--neu-shadow-concave);
    transition: all var(--transition-normal);
}

.search-input:focus {
    outline: none;
    box-shadow: inset 6px 6px 12px var(--neu-shadow-dark), inset -6px -6px 12px var(--neu-shadow-light);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    padding: 16px 32px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--neu-bg);
    border: none;
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    box-shadow: var(--neu-shadow-convex);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.search-btn:hover {
    box-shadow: var(--neu-shadow-convex-lg);
    color: var(--accent-primary);
}

.search-btn:active {
    box-shadow: var(--neu-shadow-concave);
}

/* 热门标签 */
.hot-tags {
    text-align: center;
}

.hot-tags-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.tag-btn {
    padding: 8px 16px;
    font-family: inherit;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--neu-bg);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    box-shadow: var(--neu-shadow-convex-sm);
    transition: all var(--transition-normal);
}

.tag-btn:hover {
    box-shadow: var(--neu-shadow-convex);
    color: var(--accent-primary);
}

.tag-btn:active {
    box-shadow: var(--neu-shadow-concave-sm);
}

/* ========================================
   功能特性
   ======================================== */
.features-section {
    width: 100%;
    margin-bottom: 30px;
}

.section-title {
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.feature-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 16px;
    background: var(--neu-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--neu-shadow-convex-sm);
    transition: all var(--transition-normal);
    text-align: center;
}

.feature-card:hover {
    box-shadow: var(--neu-shadow-convex);
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.feature-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.feature-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ========================================
   使用说明
   ======================================== */
.tips-section {
    width: 100%;
    background: var(--neu-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--neu-shadow-concave);
    padding: 24px;
    margin-bottom: 30px;
}

.tips-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-align: center;
}

.tips-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.tip-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: var(--neu-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--neu-shadow-convex-sm);
}

.tip-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.tip-content {
    flex: 1;
}

.tip-content strong {
    display: block;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tip-content p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    margin-top: auto;
    padding: 20px;
    text-align: center;
}

.footer-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.footer-links a {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-primary);
}

/* ========================================
   Toast 提示
   ======================================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: var(--neu-bg);
    color: var(--text-primary);
    border-radius: var(--radius-full);
    box-shadow: var(--neu-shadow-convex);
    font-size: 0.9rem;
    z-index: 1000;
    animation: toastIn 0.3s ease;
}

.toast.hide {
    animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(-50%) translateY(0); }
    to { opacity: 0; transform: translateX(-50%) translateY(20px); }
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 600px) {
    .page-container {
        padding: 20px 16px;
    }

    .engine-logo {
        width: 80px;
        height: 80px;
    }

    .engine-icon {
        font-size: 2.5rem;
    }

    .engine-title {
        font-size: 1.5rem;
    }

    .search-card {
        padding: 30px 20px;
    }

    .search-box {
        flex-direction: column;
        gap: 12px;
    }

    .search-input {
        border-radius: var(--radius-full);
        padding: 14px 20px;
    }

    .search-btn {
        border-radius: var(--radius-full);
        padding: 14px 24px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .bg-circle {
        display: none;
    }
}

/* ========================================
   减少动画
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}