/* =========================================
   全局变量
   ========================================= */
:root {
    --bg-color: #000000;
    --text-primary: #e7e9ea;
    --text-secondary: #71767b;
    --border-color: #2f3336;
    --hover-bg: rgba(255, 255, 255, 0.03);
    --accent-color: #eff3f4;
    --blue-accent: #1d9bf0;
}

* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; 
}

body { 
    background-color: var(--bg-color); 
    color: var(--text-primary); 
    overflow-x: hidden; 
}

/* 拓宽并居中容器 */
.header-inner, .app-container {
    max-width: 800px;
    margin: 0 auto;
}

.app-container {
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    min-height: calc(100vh - 80px);
}

/* =========================================
   组件样式: 顶栏与加载动画
   ========================================= */
.header { 
    padding: 20px 16px; 
    border-bottom: 1px solid var(--border-color); 
    backdrop-filter: blur(12px); 
    position: sticky; 
    top: 0; 
    z-index: 10; 
}
.logo { font-size: 1.5rem; font-weight: 800; }
.bio { color: var(--text-secondary); font-size: 0.9rem; margin-top: 5px; }

#loader { 
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; 
    background-color: var(--bg-color); z-index: 9999; 
    display: flex; justify-content: center; align-items: center; 
    transition: opacity 0.4s ease-out; 
}
.spinner { 
    width: 40px; height: 40px; 
    border: 3px solid var(--border-color); border-top-color: var(--text-primary); 
    border-radius: 50%; margin: 0 auto 20px auto; 
    animation: spin 1s linear infinite; 
}
.loader-text { 
    font-size: 1.2rem; letter-spacing: 2px; color: var(--text-primary); 
    animation: pulse 1.5s infinite; 
}
@keyframes spin { 100% { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* =========================================
   组件样式: 主页分类 Tabs 与 项目卡片
   ========================================= */
.tabs { display: flex; border-bottom: 1px solid var(--border-color); }
.tab { 
    flex: 1; text-align: center; padding: 16px 0; cursor: pointer; 
    color: var(--text-secondary); font-weight: 500; position: relative; 
}
.tab:hover { background-color: var(--hover-bg); }
.tab.active { color: var(--text-primary); font-weight: 700; }
.tab.active::after { 
    content: ''; position: absolute; bottom: 0; left: 50%; 
    transform: translateX(-50%); width: 40px; height: 4px; 
    background-color: var(--blue-accent); border-radius: 2px; 
}

.project-card { 
    padding: 20px; border-bottom: 1px solid var(--border-color); 
    cursor: pointer; transition: background 0.2s; 
    display: flex; gap: 16px; align-items: flex-start; 
}
.project-card:hover { background-color: var(--hover-bg); }
.project-icon { 
    width: 48px; height: 48px; border-radius: 12px; 
    object-fit: cover; background-color: #333; flex-shrink: 0; 
}
.project-content { flex: 1; }
.project-title-row { 
    display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; 
}
.project-title { font-size: 1.2rem; font-weight: 700; }
.project-desc { font-size: 0.95rem; color: var(--text-primary); line-height: 1.6; margin-bottom: 8px; }

/* 标签 (Tags) */
.tag { 
    background: #1d9bf015; border: 1px solid #1d9bf030; color: var(--blue-accent); 
    padding: 2px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; 
}
.tag.type { background: #fff; color: #000; border-color: #fff; }

/* =========================================
   组件样式: 详情页与画廊
   ========================================= */
.detail-view { padding: 30px 20px; }
.back-btn { 
    display: inline-block; margin-bottom: 20px; color: var(--text-secondary); 
    cursor: pointer; font-size: 0.9rem; 
}
.back-btn:hover { color: var(--text-primary); }

.detail-header { 
    display: flex; align-items: center; gap: 20px; margin-bottom: 24px; 
}
.detail-icon { 
    width: 80px; height: 80px; border-radius: 16px; 
    object-fit: cover; background-color: #333; 
}
.detail-header-text {
    display: flex; flex-direction: column; justify-content: center;
}
.detail-header-text h1 { 
    margin-bottom: 8px; line-height: 1.2; font-size: 1.8rem;
}

.detail-intro { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 24px; line-height: 1.5; }
.detail-full-desc { font-size: 1rem; line-height: 1.7; margin-bottom: 30px; }

/* 多图画廊 */
.gallery { 
    display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); 
    gap: 16px; margin-bottom: 30px; 
}
.detail-image { 
    width: 100%; height: 100%; aspect-ratio: 16 / 9; object-fit: cover; 
    border-radius: 12px; border: 1px solid var(--border-color); cursor: zoom-in; 
    transition: transform 0.2s ease, border-color 0.2s ease; 
}
.detail-image:hover { transform: scale(1.02); border-color: var(--text-secondary); }

/* 按钮 */
.action-buttons { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 30px; }
.btn { 
    padding: 10px 20px; border-radius: 24px; font-weight: 600; font-size: 0.9rem; 
    cursor: pointer; text-decoration: none; display: inline-block; 
}
.btn-primary { background-color: var(--text-primary); color: var(--bg-color); border: none; }
.btn-primary:hover { background-color: #d7d9da; }
.btn-outline { background-color: transparent; color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-outline:hover { background-color: var(--hover-bg); }

/* =========================================
   组件样式: 放大镜 (Lightbox)
   ========================================= */
.lightbox { 
    display: none; position: fixed; z-index: 10000; left: 0; top: 0; 
    width: 100vw; height: 100vh; background-color: rgba(0, 0, 0, 0.85); 
    backdrop-filter: blur(8px); justify-content: center; align-items: center; 
    opacity: 0; transition: opacity 0.3s ease; 
}
.lightbox.active { display: flex; opacity: 1; }
.lightbox-img { 
    max-width: 90vw; max-height: 90vh; border-radius: 8px; 
    box-shadow: 0 10px 40px rgba(0,0,0,0.5); transform: scale(0.95); 
    transition: transform 0.3s ease; object-fit: contain;
}
.lightbox.active .lightbox-img { transform: scale(1); }
.lightbox-close { 
    position: absolute; top: 20px; right: 30px; color: var(--text-secondary); 
    font-size: 40px; font-weight: 300; cursor: pointer; transition: color 0.2s; line-height: 1;
}
.lightbox-close:hover { color: var(--text-primary); }

/* =========================================
   组件样式: Markdown 隐私页
   ========================================= */
.markdown-body { padding: 0 20px 40px 20px; line-height: 1.8; color: var(--text-primary); font-size: 0.95rem; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin-top: 24px; margin-bottom: 12px; font-weight: 700; color: #fff; }
.markdown-body h1 { font-size: 1.8rem; padding-bottom: 10px; border-bottom: 1px solid var(--border-color); }
.markdown-body h2 { font-size: 1.4rem; }
.markdown-body p { margin-bottom: 16px; }
.markdown-body ul, .markdown-body ol { margin-bottom: 16px; padding-left: 20px; }
.markdown-body a { color: var(--blue-accent); text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }