/* Ripes Tutorial — Thai-language stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --bg: #f7f8fa;
  --bg-elev: #ffffff;
  --text: #1f2330;
  --text-muted: #5a6273;
  --border: #e2e6ec;
  --accent: #2e6cdf;
  --accent-light: #e7efff;
  --success: #2a9d4a;
  --warn: #d97706;
  --code-bg: #1e2330;
  --code-text: #e6e8ed;
  --tip-bg: #fff8e1;
  --tip-border: #ffd54f;
  --note-bg: #e7efff;
  --note-border: #2e6cdf;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Sarabun', 'Segoe UI', Tahoma, sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

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

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  padding: 24px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.sidebar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.sidebar .brand img { width: 36px; height: 36px; }
.sidebar .brand .title { font-weight: 700; font-size: 18px; line-height: 1.15; }
.sidebar .brand .subtitle { font-size: 12px; color: var(--text-muted); }
.sidebar nav h4 {
  margin: 18px 0 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.sidebar nav a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--text);
  font-size: 15px;
}
.sidebar nav a:hover { background: var(--accent-light); text-decoration: none; }
.sidebar nav a.active { background: var(--accent); color: white; }

/* Main content */
.content {
  padding: 40px 56px 80px;
  max-width: 920px;
}
.content h1 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 8px;
}
.content .lede {
  font-size: 18px;
  color: var(--text-muted);
  margin: 0 0 32px;
}
.content h2 {
  font-size: 26px;
  font-weight: 600;
  margin: 40px 0 14px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.content h2:first-of-type { border-top: none; padding-top: 0; }
.content h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 28px 0 10px;
}
.content p { margin: 0 0 14px; }
.content ul, .content ol { margin: 0 0 16px; padding-left: 24px; }
.content li { margin-bottom: 6px; }
.content img {
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 8px 0;
  background: white;
}
.content figure {
  margin: 18px 0;
  text-align: center;
}
.content figcaption {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* Code */
code {
  font-family: 'JetBrains Mono', Consolas, monospace;
  background: #eef0f4;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
}
pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 16px 18px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.55;
}
pre code {
  background: transparent;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Callouts */
.callout {
  border-left: 4px solid;
  padding: 12px 16px;
  margin: 18px 0;
  border-radius: 6px;
}
.callout.tip { background: var(--tip-bg); border-color: var(--tip-border); }
.callout.note { background: var(--note-bg); border-color: var(--note-border); }
.callout.warn { background: #fff1f1; border-color: #e34d4d; }
.callout strong { display: block; margin-bottom: 4px; }

/* Cards on home */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.card {
  display: block;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  color: var(--text);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 108, 223, 0.12);
  text-decoration: none;
}
.card .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.card .name { font-size: 18px; font-weight: 600; margin: 4px 0 6px; }
.card .desc { font-size: 14px; color: var(--text-muted); line-height: 1.5; }

/* Tables */
table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  background: var(--bg-elev);
  border-radius: 8px;
  overflow: hidden;
}
th, td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 15px;
}
th { background: #f0f3f7; font-weight: 600; }
tr:last-child td { border-bottom: none; }

/* Steps */
.steps {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}
.steps > li {
  counter-increment: step;
  padding: 14px 16px 14px 56px;
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
}
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 14px;
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
}

/* Pager (prev/next at bottom) */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.pager a {
  flex: 1;
  padding: 14px 18px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
}
.pager a:hover { border-color: var(--accent); text-decoration: none; }
.pager .label { font-size: 12px; color: var(--text-muted); }
.pager .title { font-size: 16px; font-weight: 600; margin-top: 2px; }
.pager .next { text-align: right; }
.pager .spacer { flex: 1; }

/* Mobile */
@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .content { padding: 28px 20px 60px; }
  .content h1 { font-size: 28px; }
}


/* === Back-to-tutorials-hub link in sidebar === */
.back-to-hub {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  margin: 0 0 16px;
  background: rgba(255,255,255,0.03);
  color: var(--text-muted, #9aa3b8);
  text-decoration: none;
  border-radius: 8px;
  font-size: 13px;
  border: 1px solid var(--border, rgba(255,255,255,0.06));
  transition: background 0.2s, color 0.2s, transform 0.2s;
}
.back-to-hub:hover {
  background: var(--accent-soft, rgba(255,255,255,0.06));
  color: var(--accent, inherit);
  text-decoration: none;
  transform: translateX(-2px);
}