/*
Theme Name: MinimalCard Pro
Theme URI: 
Description: 简约卡片式主题，纯白高雅，三栏瀑布流布局。专门搭配 AIPost，完美支持暗黑模式、Markdown高级排版、代码高亮。
Author: Antigravity
Author URI: 
Version: 1.1
*/

:root {
    --bg-color: #f5f6f8;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-muted: #95a5a6;
    --accent: #3498db;
    --border-color: #f0f0f0;
    --code-bg: #f8f9fa;
    --quote-bg: #f8f9fa;
    --quote-border: #3498db;
    --shadow: 0 4px 15px rgba(0,0,0,0.03);
    --shadow-hover: 0 15px 35px rgba(0,0,0,0.08);
}

/* Dark Mode Variables */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --card-bg: #1e1e1e;
        --text-main: #e0e0e0;
        --text-muted: #888888;
        --accent: #4eb8f5;
        --border-color: #333333;
        --code-bg: #2d2d2d;
        --quote-bg: #252525;
        --quote-border: #4eb8f5;
        --shadow: 0 4px 15px rgba(0,0,0,0.2);
        --shadow-hover: 0 15px 35px rgba(0,0,0,0.4);
    }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; 
    background-color: var(--bg-color); 
    color: var(--text-main); 
    line-height: 1.7; 
    transition: background-color 0.3s ease, color 0.3s ease;
}
a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
a:hover { color: var(--accent); }

/* Layout & Header */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.header { 
    padding: 50px 0 30px 0; 
    text-align: center; 
    margin-bottom: 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245, 246, 248, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}
@media (prefers-color-scheme: dark) {
    .header { background: rgba(18, 18, 18, 0.7); border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
}

.header h1 { 
    font-size: 2.6rem; 
    font-weight: 800; 
    letter-spacing: 1px; 
    background: linear-gradient(135deg, var(--text-main) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}
.header p { color: var(--text-muted); margin-top: 10px; font-size: 1.1rem; }

/* Navigation */
.nav-menu { margin-top: 25px; display: flex; justify-content: center; flex-wrap: wrap; gap: 25px; }
.nav-menu a { font-size: 1.05rem; color: var(--text-muted); font-weight: 500; padding-bottom: 5px; position: relative; }
.nav-menu a:hover, .nav-menu a.current { color: var(--text-main); }
.nav-menu a::after { content: ''; position: absolute; width: 0; height: 2px; bottom: 0; left: 50%; transform: translateX(-50%); background-color: var(--accent); transition: width 0.3s ease; }
.nav-menu a:hover::after, .nav-menu a.current::after { width: 100%; }

/* Grid & Cards */
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
@media (max-width: 992px) { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .post-grid { grid-template-columns: 1fr; gap: 20px; } }

.card { 
    background: var(--card-bg); 
    border-radius: 16px; 
    overflow: hidden; 
    box-shadow: 0 4px 20px rgba(0,0,0,0.04); 
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1); 
    display: flex; 
    flex-direction: column; 
    position: relative;
    border: 1px solid rgba(0,0,0,0.02);
    animation: fadeInUp 0.7s cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
    opacity: 0;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
.card:hover { transform: translateY(-8px); box-shadow: 0 20px 40px rgba(52, 152, 219, 0.12); }
.card-thumb { width: 100%; height: 240px; background-color: var(--border-color); overflow: hidden; display: block; position: relative; }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.card:hover .card-thumb img { transform: scale(1.05); }

/* Thumb Placeholder */
.thumb-placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%); display: flex; align-items: center; justify-content: center; color: var(--text-muted); opacity: 0.7; transition: transform 0.6s ease; }
@media (prefers-color-scheme: dark) { .thumb-placeholder { background: linear-gradient(135deg, #2d2d2d 0%, #1a1a1a 100%); } }
.thumb-placeholder svg { width: 48px; height: 48px; opacity: 0.3; }
.card:hover .thumb-placeholder { transform: scale(1.05); }

/* Category Pill */
.card-category-pill { position: absolute; top: 15px; left: 15px; background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); color: var(--text-main); padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; box-shadow: 0 2px 10px rgba(0,0,0,0.05); z-index: 10; transition: background 0.3s ease; }
@media (prefers-color-scheme: dark) { .card-category-pill { background: rgba(30, 30, 30, 0.85); color: #fff; } }
.card:hover .card-category-pill { background: var(--accent); color: #fff; }

.card-content { padding: 25px; flex-grow: 1; display: flex; flex-direction: column; }
.card-meta { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 12px; display: flex; gap: 15px; }
.card-meta span:nth-child(2) { display: none; } /* Hide old category text */
.card-title { font-size: 1.25rem; margin-bottom: 12px; font-weight: 600; line-height: 1.4; color: var(--text-main); }
.card-excerpt { font-size: 0.95rem; color: var(--text-muted); flex-grow: 1; margin-bottom: 25px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-footer { border-top: 1px solid var(--border-color); padding-top: 15px; font-size: 0.9rem; color: var(--accent); font-weight: 500; }

/* Pagination */
.pagination { display: flex; justify-content: center; margin: 60px 0; gap: 10px; list-style: none; }
.pagination a, .pagination span { display: inline-block; padding: 10px 18px; border-radius: 8px; background: var(--card-bg); box-shadow: var(--shadow); font-weight: 500; color: var(--text-main); }
.pagination .current { background: var(--accent); color: #fff; }

/* Single Post & Typography */
.post-single { background: var(--card-bg); border-radius: 12px; padding: 50px; box-shadow: var(--shadow); margin-bottom: 40px; transition: background-color 0.3s ease; }
@media (max-width: 768px) { .post-single { padding: 30px 20px; } }
.post-header { text-align: center; margin-bottom: 40px; }
.post-title { font-size: 2.2rem; margin-bottom: 15px; color: var(--text-main); }

.post-content { font-size: 1.05rem; color: var(--text-main); line-height: 1.8; overflow-wrap: break-word; }
.post-content p { margin-bottom: 1.5em; }
.post-content h1, .post-content h2, .post-content h3, .post-content h4 { margin: 1.5em 0 0.8em 0; color: var(--text-main); font-weight: 600; }
.post-content h2 { font-size: 1.6rem; border-bottom: 1px solid var(--border-color); padding-bottom: 8px; }
.post-content img { max-width: 100%; border-radius: 8px; margin: 20px auto; box-shadow: var(--shadow); display: block; }
.post-content ul, .post-content ol { padding-left: 25px; margin-bottom: 1.5em; }
.post-content li { margin-bottom: 0.5em; }
.post-content blockquote { border-left: 4px solid var(--quote-border); padding: 15px 20px; margin: 20px 0; background: var(--quote-bg); color: var(--text-muted); border-radius: 0 8px 8px 0; font-style: italic; }
.post-content blockquote p { margin-bottom: 0; }
.post-content code { background-color: var(--code-bg); padding: 3px 6px; border-radius: 4px; font-family: Consolas, Monaco, 'Courier New', monospace; font-size: 0.9em; color: var(--accent); }
.post-content pre { margin-bottom: 1.5em; border-radius: 8px !important; }
.post-content pre code { background: transparent; padding: 0; color: inherit; }
.post-content table { width: 100%; border-collapse: collapse; margin-bottom: 20px; overflow-x: auto; display: block; }
.post-content th, .post-content td { border: 1px solid var(--border-color); padding: 12px; text-align: left; }
.post-content th { background-color: var(--quote-bg); font-weight: 600; }

/* Forms & Comments */
.textarea, .text { background-color: var(--card-bg); color: var(--text-main); border: 1px solid var(--border-color); }
.textarea:focus, .text:focus { border-color: var(--accent); outline: none; }

/* Footer */
.footer { text-align: center; padding: 30px 0 50px 0; color: var(--text-muted); font-size: 0.9rem; }

/* Reading Progress */
#reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--accent);
    z-index: 9999;
    transition: width 0.1s ease;
}

/* Back to Top */
#back-to-top {
    position: fixed;
    right: 30px;
    bottom: -60px;
    width: 45px;
    height: 45px;
    background: var(--card-bg);
    color: var(--text-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-hover);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 999;
    opacity: 0;
}
#back-to-top.show {
    bottom: 30px;
    opacity: 1;
}
#back-to-top:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-5px);
}

/* Post Navigation (Prev/Next) */
.post-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px dashed var(--border-color);
}
.post-nav > div {
    flex: 1;
    min-width: 0; /* 关键：防止过长文本撑爆 flex 容器 */
    background: var(--quote-bg);
    padding: 20px;
    border-radius: 10px;
    transition: background 0.3s, transform 0.3s;
    overflow: hidden;
}
.post-nav > div:hover {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    transform: translateY(-3px);
}
.post-nav a { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.post-nav span { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 5px; display: inline-block; }
.post-nav strong { font-size: 1.1rem; color: var(--text-main); font-weight: 600; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.post-nav-next { text-align: right; }

@media (max-width: 768px) {
    .post-nav { flex-direction: column; }
    .post-nav-next { text-align: left; }
    
    /* 修复手机端顶部遮挡问题：取消吸顶，并缩小内边距和字号 */
    .header {
        position: relative;
        padding: 30px 0 20px 0;
    }
    .header h1 {
        font-size: 2rem;
    }
}