/* ======================================================
   Ruby tDiary Blog Pages — ruby-online.css
   Modern redesign — consistent with main site palette
   ====================================================== */

:root {
  --ruby:       #CC342D;
  --ruby-dark:  #A82822;
  --navy:       #1E1B2E;
  --bg:         #FFFFFF;
  --bg-alt:     #F8F9FA;
  --text:       #111827;
  --text-muted: #6B7280;
  --border:     #E5E7EB;
  --code-bg:    #1E1E2E;
  --code-text:  #CDD6F4;
  --radius:     8px;
  --shadow:     0 1px 3px rgba(0,0,0,.1);
  --font:       system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
                Roboto, 'Helvetica Neue', Arial, 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --font-mono:  'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; }

/* ── Reset ── */
html { font-size: 16px; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

/* ── Sticky top bar (mimics main nav) ── */
body::before {
  content: 'Ruby Programming Language';
  display: block;
  background: var(--navy);
  color: rgba(255,255,255,.75);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .04em;
  padding: .75rem 2rem;
  text-align: center;
}

a { color: var(--ruby); text-decoration: none; }
a:hover { color: var(--ruby-dark); text-decoration: underline; }

p  { margin: 0 0 1rem; }
ul, ol { margin: 0 0 1rem; padding-left: 1.5rem; }
li { margin-bottom: .3rem; }

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
  margin: 1.5rem 0 .6rem;
  color: var(--text);
}
h1 { font-size: 1.625rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.1rem; }

code { font-family: var(--font-mono); font-size: .85em; }
pre  {
  font-family: var(--font-mono);
  font-size: .8125rem;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1rem 0;
  line-height: 1.75;
}

hr      { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }
hr.sep  { border-top-color: var(--border); margin: 1.25rem 0; }

/* ── Page layout ── */
body > h1 {
  max-width: 1100px;
  margin: 2rem auto 1.5rem;
  padding: 0 2rem;
  font-size: 1.75rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Ruby logo in h1 */
img.top_ruby {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  flex-shrink: 0;
}

/* Two-column layout: main + sidebar */
body {
  display: grid;
  grid-template-columns: 1fr 220px;
  grid-template-rows: auto auto auto 1fr auto;
  grid-template-areas:
    "heading  heading"
    "main     sidebar"
    "footer   footer";
  max-width: 1100px;
  margin-inline: auto;
  padding: 0 2rem 3rem;
  gap: 0 2rem;
  min-height: 100vh;
}

/* Override ::before bar */
body::before {
  grid-column: 1 / -1;
  margin: 0 -2rem;
}

body > h1 {
  grid-area: heading;
  margin: 1.5rem 0 .5rem;
  padding: 0;
}

div.main    { grid-area: main;    min-width: 0; }
div.sidebar { grid-area: sidebar; }
div.footer  { grid-column: 1 / -1; }

/* ── Admin / breadcrumb nav ── */
div.adminmenu {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  font-size: .8125rem;
}
span.adminmenu a {
  display: inline-block;
  padding: .3rem .75rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color .15s, color .15s;
}
span.adminmenu a:hover { border-color: var(--ruby); color: var(--ruby); text-decoration: none; }

/* ── Diary entry ── */
div.day {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

div.day h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.2rem;
  border-bottom: 2px solid var(--border);
  padding-bottom: .5rem;
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
  align-items: baseline;
}

span.date a {
  color: var(--text-muted);
  font-size: .875rem;
  font-weight: 400;
}
span.title { font-weight: 700; }

div.body  { padding: 0; }
div.body > *:last-child { margin-bottom: 0; }

div.section { margin-bottom: 1rem; }

span.lm, div.lm {
  display: block;
  font-size: .75rem;
  color: var(--text-muted);
  margin-top: .75rem;
  padding-top: .5rem;
  border-top: 1px solid var(--border);
}

div.comment {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
  font-size: .875rem;
  color: var(--text-muted);
}

/* ── Sidebar ── */
div.sidebar {
  font-size: .875rem;
}

div.sidebar div.menu {
  font-weight: 700;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-top: 1.25rem;
  margin-bottom: .35rem;
  padding-bottom: .25rem;
  border-bottom: 1px solid var(--border);
}

div.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0 0 .25rem;
}
div.sidebar ul li {
  padding: .2rem 0;
  border-bottom: 1px solid var(--border);
}
div.sidebar ul li:last-child { border-bottom: none; }
div.sidebar ul li a { color: var(--text); font-size: .8125rem; }
div.sidebar ul li a:hover { color: var(--ruby); text-decoration: none; }

div.sidebar form { margin-top: .5rem; }
div.sidebar input[type="text"],
div.sidebar select {
  width: 100%;
  padding: .3rem .5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: .8125rem;
  background: var(--bg);
  color: var(--text);
  margin-bottom: .3rem;
}
div.sidebar input[type="submit"] {
  padding: .25rem .75rem;
  background: var(--ruby);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: .8125rem;
  cursor: pointer;
}
div.sidebar input[type="submit"]:hover { background: var(--ruby-dark); }

/* ── Footer ── */
div.footer {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  line-height: 1.6;
}
div.footer a { color: var(--text-muted); }
div.footer a:hover { color: var(--ruby); }

/* External link icon */
img.ext {
  display: inline;
  vertical-align: middle;
  width: 9px;
  height: 9px;
  opacity: .5;
  margin-left: 2px;
}

/* ── Responsive ── */
@media (max-width: 720px) {
  body {
    grid-template-columns: 1fr;
    grid-template-areas:
      "heading"
      "main"
      "sidebar"
      "footer";
    padding: 0 1rem 2rem;
    gap: 0;
  }
  body::before { margin: 0 -1rem; }
  body > h1 { font-size: 1.375rem; }
  div.sidebar { margin-top: 2rem; }
}