/* style.css —— 真正完美的三列瀑布流（2025 最稳方案） */
* { margin:0; padding:0; box-sizing:border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f9f9fc;
    color: #1d1d1f;
    min-height: 100vh;
}

@media (prefers-color-scheme: dark) {
    body { background:#000; color:#f5f5f7; }
}

.app-container {
    /* 在大屏上扩大容器宽度，随视口自适应并设置上限 */
    max-width: clamp(1200px, 90vw, 1920px);
    margin: 0 auto;
    padding: 30px 20px;
}

/* 标题与搜索框 */
.header h1 {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
}
.search-box {
    max-width: 600px;
    margin: 0 auto 40px;
}
#search-input {
    width: 100%;
    padding: 18px 24px;
    font-size: 18px;
    border: none;
    border-radius: 24px;
    background: white;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    outline: none;
}
@media (prefers-color-scheme: dark) {
    #search-input { background:#1c1c1e; box-shadow:0 10px 40px rgba(0,0,0,0.7); }
}

/* ========= 核心：CSS Columns 实现完美瀑布流 ========= */
.notes-grid {
    column-gap: 18px;           /* 列间距（原 32px，减到约 56%） */
    /* 固定最多 3 列，列宽随容器自适应 */
    column-count: 3;
    /* 跟随外层容器宽度扩展 */
    max-width: inherit;
    width: 100%;
    margin: 0 auto;
}

.note-card {
    break-inside: avoid;       /* 防止卡片被截断 */
    margin-bottom: 18px;       /* 垂直间距（与列间距一致） */
    background: white;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0,0,0,0.12);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
    display: inline-block;
    width: 100%;
    vertical-align: top;       /* 顶部对齐，防止小卡片下沉 */
}

.note-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 32px 70px rgba(0,0,0,0.25);
}

@media (prefers-color-scheme: dark) {
    .note-card {
        background: #1c1c1e;
        box-shadow: 0 12px 40px rgba(0,0,0,0.8);
    }
    .note-card:hover { box-shadow: 0 32px 70px rgba(0,0,0,1); }
}

/* 卡片内部 */
.note-title {
    font-size: 20px;
    font-weight: 600;
    padding: 28px 28px 12px;
    margin: 0;
}
.note-tags {
    padding: 0 28px 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.tag {
    background: #e8e8ee;
    color: #333;
    font-size: 13.5px;
    padding: 7px 15px;
    border-radius: 18px;
    font-weight: 500;
}
.note-content {
    padding: 0 18px 24px;
    font-size: 16px;
    color: #333;
}
@media (prefers-color-scheme: dark) {
    .tag { background:#38383a; color:#ddd; }
    .note-title, .note-content { color:#f5f5f7; }
    .note-content { color:#ddd; }
}

/* 代码块美化 */
.code-wrapper {
    margin: 20px 0;
    border-radius: 10px;
    overflow: hidden;
    background: #282c34;
    position: relative;
}
.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0,0,0,0.6);
    color: #fff;
    font-size: 12px;
    padding: 6px 10px;
}
.code-lang { opacity: 0.8; }
.copy-btn {
    background: none;
    border: 1px solid rgba(255,255,255,0.6);
    color: #fff;
    border-radius: 4px;
    padding: 2px 6px;
    cursor: pointer;
    font-size: 12px;
}
.copy-btn:hover { background: rgba(255,255,255,0.2); }
.copy-btn:active { background: rgba(255,255,255,0.35); }
.note-content pre {
    margin: 0 !important;
    border-radius: 10px;
    overflow: hidden;
}
.hljs {
    border-radius: 10px !important;
    padding: 12px !important;
    font-size: 14.5px !important;
}
.note-card dl, ol, ul {
    margin-left: 1rem;
}

/* 响应式自动降列（无需 JS 控制） */
@media (max-width: 1100px) { .notes-grid { column-count: 2; } }   /* 2 列 */
@media (max-width: 720px)  { .notes-grid { column-count: 1; } }   /* 手机单列 */