/* ============================================
   Mademoiselle Bulle — Theme CSS
   Prefix: mb__
   Primary: #d45172 / hover: #de7a93
   Fonts: ZCOOL XiaoWei (titles) + Lora (body)
   ============================================ */

/* ── Reset ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ── Variables ── */
:root {
  --mb-primary: #d45172;
  --mb-primary-hover: #de7a93;
  --mb-text: #333;
  --mb-text-light: #666;
  --mb-bg: #fff;
  --mb-border: #e5e5e5;
  --mb-font-title: 'ZCOOL XiaoWei', serif;
  --mb-font-body: 'Lora', serif;
  --mb-font-ui: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mb-max-width: 1200px;
  --mb-content-width: 740px;
}

/* ── Body ── */
body {
  font-family: var(--mb-font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--mb-text);
  background: var(--mb-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--mb-text);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--mb-primary-hover);
}

img {
  max-width: 100%;
  height: auto;
}

/* ── Header ── */
.mb__header {
  text-align: center;
  margin-bottom: 30px;
}

.mb__logo-area {
  padding: 20px 0 10px;
}

.mb__logo {
  font-family: var(--mb-font-title);
  font-size: 2.25rem;
  text-transform: uppercase;
  letter-spacing: -1px;
  color: var(--mb-text);
  display: inline-block;
}
.mb__logo:hover {
  color: var(--mb-text);
  text-decoration: none;
}

/* ── Navigation ── */
.mb__nav {
  border-top: 1px solid var(--mb-border);
  border-bottom: 1px solid var(--mb-border);
  position: sticky;
  top: 0;
  background: var(--mb-bg);
  z-index: 100;
}

.mb__nav-inner {
  max-width: var(--mb-max-width);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 0;
  padding: 0 15px;
  overflow-x: auto;
}

.mb__nav-link {
  display: block;
  padding: 12px 15px;
  font-family: var(--mb-font-ui);
  font-size: 14px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--mb-text);
  white-space: nowrap;
}
.mb__nav-link:hover,
.mb__nav-active {
  color: var(--mb-primary-hover);
}

/* ── Banner ── */
.mb__banner {
  max-width: var(--mb-max-width);
  margin: 0 auto 30px;
  padding: 0 15px;
  text-align: center;
}
.mb__banner img {
  width: 100%;
  display: block;
}

/* ── Section headers ── */
.mb__section-header {
  max-width: var(--mb-max-width);
  margin: 0 auto 30px;
  padding: 0 15px;
  text-align: center;
}
.mb__section-header hr {
  border: none;
  border-top: 1px solid var(--mb-border);
  margin: 0;
}

.mb__section-title {
  font-family: var(--mb-font-title);
  font-size: 2.25rem;
  text-transform: uppercase;
  margin: 15px 0;
  font-weight: 400;
}

/* ── Feed (homepage articles) ── */
.mb__feed {
  max-width: var(--mb-max-width);
  margin: 0 auto;
  padding: 0 15px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
}

.mb__feed article {
  border: none;
  overflow: hidden;
}

.mb__feed article img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  margin-bottom: 15px;
}

.mb__feed article h2 {
  font-family: var(--mb-font-title);
  font-size: 1.75rem;
  text-transform: uppercase;
  line-height: 1.2;
  margin-bottom: 10px;
}

.mb__feed article h2 a {
  color: var(--mb-text);
}
.mb__feed article h2 a:hover {
  color: var(--mb-primary-hover);
}

.mb__feed article time {
  font-family: var(--mb-font-ui);
  font-size: 13px;
  color: var(--mb-text-light);
  display: block;
  margin-bottom: 10px;
}

.mb__feed article p {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--mb-text-light);
  margin-bottom: 15px;
}

.mb__feed article > div > a:last-child {
  font-family: var(--mb-font-ui);
  font-size: 13px;
  color: var(--mb-primary);
  font-weight: 600;
}

/* ── Main container ── */
.mb__main {
  max-width: var(--mb-max-width);
  margin: 0 auto;
  padding: 0 15px 60px;
}

/* ── Article page ── */
.mb__article {
  max-width: var(--mb-content-width);
  margin: 0 auto;
}

.mb__article-hero {
  margin: 0 auto 30px;
  max-width: var(--mb-max-width);
}
.mb__article-hero img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 500px;
}

.mb__article-header {
  text-align: center;
  margin-bottom: 30px;
}

.mb__article-meta {
  font-family: var(--mb-font-ui);
  font-size: 13px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.mb__article-meta time {
  color: var(--mb-text-light);
  margin-left: 10px;
}

.mb__article-tags {
  color: var(--mb-primary-hover);
}

.mb__article-title {
  font-family: var(--mb-font-title);
  font-size: 2.25rem;
  text-transform: uppercase;
  line-height: 1.2;
  margin-bottom: 15px;
  letter-spacing: -1px;
}

.mb__article-author {
  font-family: var(--mb-font-ui);
  font-size: 0.9375rem;
  margin-bottom: 30px;
}

.mb__article-author b a {
  color: var(--mb-text);
}

/* ── Article body ── */
.mb__article-body {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: 40px;
}

.mb__article-body p {
  margin-bottom: 20px;
}

.mb__article-body h2,
.mb__article-body h3 {
  font-family: var(--mb-font-body);
  font-weight: 700;
  margin-top: 35px;
  margin-bottom: 15px;
}

.mb__article-body h2 {
  font-size: 1.5rem;
}

.mb__article-body h3 {
  font-size: 1.25rem;
}

.mb__article-body ul,
.mb__article-body ol {
  margin-bottom: 20px;
  padding-left: 30px;
}

.mb__article-body li {
  margin-bottom: 8px;
}

.mb__article-body a {
  color: var(--mb-primary);
  font-weight: 700;
}
.mb__article-body a:hover {
  color: var(--mb-primary-hover);
}

.mb__article-body figure {
  margin: 30px 0;
}

.mb__article-body figure img {
  width: 100%;
  height: auto;
  display: block;
}

.mb__article-body figcaption {
  font-size: 0.875rem;
  color: var(--mb-text-light);
  text-align: center;
  margin-top: 8px;
}

.mb__article-body strong a {
  font-weight: 700;
}

/* ── Related articles ── */
.mb__related {
  max-width: var(--mb-content-width);
  margin: 0 auto 60px;
  text-align: center;
}

.mb__related hr {
  border: none;
  border-top: 1px solid var(--mb-border);
  margin: 0;
}

.mb__related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
  text-align: left;
}

/* ── Footer ── */
.mb__footer {
  background: #222;
  color: rgba(255, 255, 255, 0.6);
  padding: 40px 15px 20px;
}

.mb__footer-inner {
  max-width: var(--mb-max-width);
  margin: 0 auto;
  text-align: center;
}

.mb__footer .mb__logo {
  color: #fff;
  font-size: 1.75rem;
  margin-bottom: 20px;
}
.mb__footer .mb__logo:hover {
  color: #fff;
}

.mb__footer-social {
  margin: 15px 0;
}
.mb__footer-social a {
  color: rgba(255, 255, 255, 0.6);
  margin: 0 10px;
  font-family: var(--mb-font-ui);
  font-size: 14px;
}
.mb__footer-social a:hover {
  color: #fff;
}

.mb__footer-copy {
  font-family: var(--mb-font-ui);
  font-size: 12px;
  margin-top: 20px;
  color: rgba(255, 255, 255, 0.4);
}

/* ── Table of Contents (TOC) ── */
.mb__toc {
  background: #fdf6f8;
  border-left: 3px solid var(--mb-primary);
  padding: 20px 25px;
  margin: 30px 0;
  border-radius: 0 4px 4px 0;
}
.mb__toc h3 {
  font-family: var(--mb-font-title);
  font-size: 1.25rem;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--mb-text);
}
.mb__toc ol {
  padding-left: 20px;
  margin: 0;
}
.mb__toc li {
  margin-bottom: 6px;
  font-family: var(--mb-font-ui);
  font-size: 0.9375rem;
}
.mb__toc a {
  color: var(--mb-primary);
}
.mb__toc a:hover {
  color: var(--mb-primary-hover);
}

/* ── Callout: Tip ── */
.mb__tip {
  background: #f0faf0;
  border-left: 3px solid #4caf50;
  padding: 16px 20px;
  margin: 25px 0;
  border-radius: 0 4px 4px 0;
  font-size: 0.9375rem;
  line-height: 1.6;
}
.mb__tip strong {
  display: block;
  margin-bottom: 6px;
  color: #2e7d32;
}

/* ── Callout: Warning ── */
.mb__warning {
  background: #fff8e1;
  border-left: 3px solid #ff9800;
  padding: 16px 20px;
  margin: 25px 0;
  border-radius: 0 4px 4px 0;
  font-size: 0.9375rem;
  line-height: 1.6;
}
.mb__warning strong {
  display: block;
  margin-bottom: 6px;
  color: #e65100;
}

/* ── FAQ ── */
.mb__faq {
  margin: 40px 0;
}
.mb__faq h2 {
  font-family: var(--mb-font-body);
  font-weight: 700;
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.mb__faq details {
  border-bottom: 1px solid var(--mb-border);
  padding: 15px 0;
}
.mb__faq details:first-of-type {
  border-top: 1px solid var(--mb-border);
}
.mb__faq summary {
  font-family: var(--mb-font-body);
  font-weight: 700;
  font-size: 1.0625rem;
  cursor: pointer;
  color: var(--mb-text);
  list-style: none;
  padding-right: 25px;
  position: relative;
}
.mb__faq summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 0;
  font-size: 1.25rem;
  color: var(--mb-primary);
}
.mb__faq details[open] summary::after {
  content: '−';
}
.mb__faq details p {
  margin-top: 10px;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--mb-text-light);
}

/* ── Sources E-E-A-T ── */
.mb__sources {
  background: #f9f9f9;
  border: 1px solid var(--mb-border);
  padding: 20px 25px;
  margin: 40px 0;
  border-radius: 4px;
}
.mb__sources h3 {
  font-family: var(--mb-font-ui);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  color: var(--mb-text-light);
}
.mb__sources ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.mb__sources li {
  margin-bottom: 6px;
  font-size: 0.875rem;
}
.mb__sources a {
  color: var(--mb-primary);
}

/* ── Article meta (author + date update) ── */
.mb__article-updated {
  font-family: var(--mb-font-ui);
  font-size: 0.8125rem;
  color: var(--mb-text-light);
  font-style: italic;
  margin-bottom: 20px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .mb__nav-inner {
    justify-content: flex-start;
    gap: 0;
  }
  .mb__nav-link {
    padding: 10px 10px;
    font-size: 12px;
  }
  .mb__feed {
    grid-template-columns: 1fr;
  }
  .mb__article-title {
    font-size: 1.75rem;
  }
  .mb__section-title {
    font-size: 1.75rem;
  }
}