/* in-my-brain — Minimal Reading Theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --bg:          #F9F7F4;
  --text:        #1C1C1E;
  --text-sub:    #6B6B6B;
  --border:      #E0DEDD;
  --accent:      #3A3A3C;
  --link:        #4A7FA5;
  --link-hover:  #1C1C1E;
  --font-body:   'Noto Sans JP', 'Inter', sans-serif;
  --max-width:   720px;
}

/* ── Base ── */
body {
  font-family: var(--font-body) !important;
  font-size: 16px;
  color: var(--text) !important;
  background-color: var(--bg) !important;
  line-height: 1.9;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

/* ── Content width ── */
.publish-article-width,
.site-body-left-column {
  max-width: var(--max-width) !important;
}

/* ── Site title ── */
.site-header-text {
  font-family: 'Inter', sans-serif !important;
  font-size: 1.1rem !important;
  font-weight: 500 !important;
  letter-spacing: 0.08em !important;
  color: var(--text) !important;
  text-transform: lowercase;
}

/* ── Headings ── */
.markdown-rendered h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text) !important;
  margin-top: 2.5em;
  margin-bottom: 0.8em;
  padding-bottom: 0.4em;
  border-bottom: 2px solid var(--border);
}

.markdown-rendered h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text) !important;
  margin-top: 2.2em;
  margin-bottom: 0.8em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--accent);
}

.markdown-rendered h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text) !important;
  margin-top: 1.8em;
  margin-bottom: 0.6em;
  padding-left: 0.6em;
  border-left: 4px solid var(--accent);
}

/* ── Paragraph ── */
.markdown-rendered p {
  margin-bottom: 1.4em;
  color: var(--text);
}

/* ── Links ── */
.markdown-rendered a {
  color: var(--link) !important;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.15s ease;
}
.markdown-rendered a:hover {
  color: var(--link-hover) !important;
}

/* ── Blockquote ── */
.markdown-rendered blockquote {
  border-left: 3px solid var(--border);
  margin-left: 0;
  padding: 0.2em 1.2em;
  color: var(--text-sub);
  font-style: normal;
}

/* ── Horizontal rule ── */
.markdown-rendered hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5em 0;
}

/* ── Code ── */
.markdown-rendered code {
  font-size: 0.88em;
  background: #EFEDEA;
  padding: 0.1em 0.4em;
  border-radius: 3px;
}

/* ── Table ── */
.markdown-rendered table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93em;
}
.markdown-rendered th,
.markdown-rendered td {
  border: 1px solid var(--border);
  padding: 0.5em 0.8em;
  text-align: left;
}
.markdown-rendered th {
  background: #F0EDE9;
  font-weight: 500;
}

/* ── Back to top button ── */
#back-to-top {
  position: fixed;
  bottom: 36px;
  right: 36px;
  width: 42px;
  height: 42px;
  background-color: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}
#back-to-top:hover {
  opacity: 1;
}

/* ── Images ── */
.markdown-rendered img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

/* ── Mobile responsiveness ── */
@media screen and (max-width: 768px) {
  body {
    font-size: 15px;
    line-height: 1.8;
  }

  /* Ensure content doesn't touch the screen edges */
  .publish-article-width,
  .site-body-left-column {
    padding-left: 1.2rem !important;
    padding-right: 1.2rem !important;
    box-sizing: border-box;
  }

  /* Adjust heading sizes for smaller screens */
  .markdown-rendered h1 {
    font-size: 1.5rem;
    margin-top: 1.8em;
  }

  .markdown-rendered h2 {
    font-size: 1.3rem;
    margin-top: 1.6em;
  }

  .markdown-rendered h3 {
    font-size: 1.1rem;
  }

  /* Make tables scrollable horizontally to prevent overflow */
  .markdown-rendered table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }

  /* Shrink back-to-top button slightly */
  #back-to-top {
    bottom: 24px;
    right: 24px;
    width: 38px;
    height: 38px;
    font-size: 16px;
  }
}