/* ========= Fonts ========= */
@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Noto+Sans+JP:wght@300;400;500;700&display=swap");

/* ========= Theme tokens ========= */
:root {
  --mui-font-sans: "Roboto","Noto Sans JP",system-ui,-apple-system,"Segoe UI",Arial,"Hiragino Kaku Gothic ProN","ヒラギノ角ゴ ProN W3","Meiryo","メイリオ","Noto Sans CJK JP",sans-serif;
  --mui-radius: 12px;
  --mui-shadow-1: 0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --mui-shadow-2: 0 4px 6px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --mui-spacing: 8px;

  /* Light palette */
  --mui-primary: #1976d2;
  --mui-primary-contrast: #fff;
  --mui-secondary: #9c27b0;
  --mui-text: #1a1a1a;
  --mui-text-secondary: #5f6368;
  --mui-bg: #fafafa;
  --mui-paper: #ffffff;
  --mui-divider: #e0e0e0;
  --mui-link: #1976d2;
  --mui-code-bg: #f5f7fa;
  --mui-blockquote-bg: #f3f6fb;
}
@media (prefers-color-scheme: dark) {
  :root {
    /* Dark palette */
    --mui-primary: #90caf9;
    --mui-primary-contrast: #041018;
    --mui-secondary: #ce93d8;
    --mui-text: #c1cbd7;
    --mui-text-secondary: #99a4b4;
    --mui-bg: #151a20;
    --mui-paper: #1a212c;
    --mui-divider: #2a3441;
    --mui-link: #90caf9;
    --mui-code-bg: #262930;
    --mui-blockquote-bg: #0b1a2d;
  }
}

/* ========= Page container ========= */
html,body { background: var(--mui-bg); }
#app.markdown-body {
  font-family: var(--mui-font-sans);
  color: var(--mui-text);
  background: var(--mui-paper);
  border-radius: var(--mui-radius);
  box-shadow: var(--mui-shadow-1);
  padding: calc(var(--mui-spacing) * 3);
}

/* ========= Headings ========= */
.markdown-body h1,.markdown-body h2,.markdown-body h3,
.markdown-body h4,.markdown-body h5,.markdown-body h6 {
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--mui-text);
  scroll-margin-top: 80px;
}
.markdown-body h1 { font-size: clamp(1.8rem, 2.4vw, 2.4rem); margin: 0 0 0.75em; }
.markdown-body h2 { font-size: clamp(1.5rem, 2vw, 2rem); margin: 2em 0 .75em; border-bottom: 1px solid var(--mui-divider); padding-bottom: .3em; }
.markdown-body h3 { font-size: 1.25rem; margin: 1.5em 0 .5em; }

/* ========= Text & links ========= */
.markdown-body p, .markdown-body li { line-height: 1.85; color: var(--mui-text); }
.markdown-body strong { font-weight: 700; }
.markdown-body small { color: var(--mui-text-secondary); }
.markdown-body a { color: var(--mui-link); text-decoration: none; font-weight: 500; }
.markdown-body a:hover { text-decoration: underline; }

/* ========= Lists ========= */
.markdown-body ul, .markdown-body ol { padding-left: 1.4em; }

/* ========= Blockquote (Alert風) ========= */
.markdown-body blockquote {
  margin: 1.2em 0;
  padding: 12px 16px;
  border-left: 4px solid var(--mui-primary);
  background: var(--mui-blockquote-bg);
  border-radius: 0 var(--mui-radius) var(--mui-radius) 0;
  color: var(--mui-text);
}

/* ========= Code ========= */
.markdown-body code {
  background: var(--mui-code-bg);
  border: 1px solid var(--mui-divider);
  border-radius: 8px;
  padding: 0 .35em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: .95em;
}
.markdown-body pre code { border: none; padding: 0; background: transparent; }
.markdown-body pre {
  background: var(--mui-code-bg);
  border: 1px solid var(--mui-divider);
  border-radius: var(--mui-radius);
  padding: 16px;
  overflow: auto;
  box-shadow: var(--mui-shadow-1);
}

/* ========= Tables ========= */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  background: var(--mui-paper);
  border: 1px solid var(--mui-divider);
  border-radius: var(--mui-radius);
  overflow: hidden;
  box-shadow: var(--mui-shadow-1);
}
.markdown-body thead th {
  background: color-mix(in srgb, var(--mui-primary) 10%, var(--mui-paper));
  color: var(--mui-text);
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  border-bottom: 1px solid var(--mui-divider);
}
.markdown-body td, .markdown-body th {
  padding: 10px 12px;
  border-bottom: 1px solid var(--mui-divider);
}
.markdown-body tbody tr:hover {
  background: color-mix(in srgb, var(--mui-paper) 90%, var(--mui-primary) 10%);
}

/* ========= HR ========= */
.markdown-body hr {
  border: none;
  border-top: 1px solid var(--mui-divider);
  margin: 32px 0;
}

/* ========= Images ========= */
.markdown-body img {
  border-radius: var(--mui-radius);
  box-shadow: var(--mui-shadow-1);
  max-width: 100%;
  height: auto;
}

/* ========= Details/Summary (Accordion風) ========= */
.markdown-body details {
  border: 1px solid var(--mui-divider);
  border-radius: var(--mui-radius);
  background: var(--mui-paper);
  margin: 12px 0;
  box-shadow: var(--mui-shadow-1);
}
.markdown-body summary {
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 600;
  list-style: none;
}
.markdown-body summary::-webkit-details-marker { display:none; }
.markdown-body details[open] { box-shadow: var(--mui-shadow-2); }
.markdown-body details > *:not(summary) { padding: 0 16px 16px; }

/* ========= Button風リンク ========= */
.markdown-body a.button, .markdown-body .btn {
  display: inline-block;
  background: var(--mui-primary);
  color: var(--mui-primary-contrast);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: var(--mui-shadow-1);
  border: 1px solid color-mix(in srgb, var(--mui-primary) 60%, black 5%);
}
.markdown-body a.button:hover, .markdown-body .btn:hover {
  filter: brightness(1.05);
  text-decoration: none;
  box-shadow: var(--mui-shadow-2);
}

/* ========= Chip風 ========= */
.markdown-body .chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  background: color-mix(in srgb, var(--mui-primary) 15%, var(--mui-paper));
  color: var(--mui-text);
  border: 1px solid var(--mui-divider);
  font-size: .85em; font-weight: 600;
}