/* ==========================================================================
   regex-tester yst 主题适配 (在原 styles.css 基础上微调)
   ========================================================================== */

/* 重置 body / 容器 让 yst-shell 接管 */
body.yst-page {
    background: var(--yst-bg, #f5fafa) !important;
    min-height: auto;
    margin: 0;
}

/* 隐藏背景动画 */
.background-animation,
.bg-circles { display: none !important; }

/* 内层 main-container 不再自定义最大宽 */
.rt-main-container {
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
    background: transparent !important;
}

/* 页面标题 */
.rt-page-header { margin-bottom: 16px; }
.rt-page-title {
    font: 700 28px/1.2 var(--yst-font);
    color: var(--yst-text);
    margin: 0 0 8px;
    letter-spacing: var(--yst-letter-spacing);
}
.rt-page-desc { font-size: 14px; color: var(--yst-text-2); margin: 0 0 14px; }
.rt-feature-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.rt-tag {
    display: inline-flex; align-items: center;
    height: 22px; padding: 0 9px;
    background: var(--yst-bg-subtle);
    border: 1px solid var(--yst-border);
    border-radius: 5px;
    color: var(--yst-text-muted);
    font: 600 11px/1 var(--yst-font-mono, monospace);
    letter-spacing: 0.5px;
    text-transform: lowercase;
}

/* Tab 切换栏 */
.rt-tabs-card { padding: 12px 16px; margin-bottom: 14px; }
.rt-tabs-row {
    display: flex; align-items: center;
    justify-content: space-between;
    flex-wrap: wrap; gap: 10px;
}
.rt-tabs {
    display: flex; flex-wrap: wrap;
    gap: 4px;
    background: var(--yst-bg-subtle);
    border-radius: 8px;
    padding: 4px;
}
/* 覆盖原 navbar 的 nav-item 样式 */
.rt-tabs .nav-item {
    height: 32px;
    padding: 0 14px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--yst-text-muted);
    font: 600 13px var(--yst-font);
    cursor: pointer;
    transition: all .15s;
    letter-spacing: var(--yst-letter-spacing);
    margin: 0;
    box-shadow: none;
}
.rt-tabs .nav-item:hover { color: var(--yst-brand); background: transparent; }
.rt-tabs .nav-item.active {
    background: #fff;
    color: var(--yst-brand);
    box-shadow: 0 1px 2px rgba(15,23,42,.06);
}
.rt-mini-btn {
    height: 30px;
    padding: 0 12px;
    font-size: 12px;
}

/* 信息卡 */
.rt-info { padding: 18px 22px; margin-bottom: 14px; }
.rt-feature h3 {
    font: 700 14px/1.4 var(--yst-font);
    color: var(--yst-text);
    margin: 0 0 6px;
    position: relative;
    padding-left: 12px;
}
.rt-feature h3::before {
    content: "";
    position: absolute;
    left: 0; top: 5px; bottom: 5px;
    width: 3px;
    background: var(--yst-brand);
    border-radius: 0 2px 2px 0;
}
.rt-feature p {
    font: 13px/1.6 var(--yst-font);
    color: var(--yst-text-2);
    margin: 0;
}
.rt-info code {
    padding: 1px 6px;
    background: var(--yst-bg-subtle);
    border: 1px solid var(--yst-border);
    border-radius: 3px;
    font: 12px var(--yst-font-mono, monospace);
    color: var(--yst-brand);
}

/* 让原 tool-container / panel 适配 yst-shell 容器宽度 */
.rt-main-container .tab-content { padding: 0 !important; }
.rt-main-container .tab-content .tool-container {
    max-width: none !important;
    background: transparent !important;
    box-shadow: none !important;
    padding: 0 !important;
}

/* 移动端 */
@media (max-width: 768px) {
    .rt-page-title { font-size: 22px; }
    .rt-info { padding: 14px; }
    .rt-tabs { width: 100%; overflow-x: auto; }
}