/* =========================================================
   Copilot Studio Hands-on — Microsoft Fluent inspired theme
   ========================================================= */

:root {
  --ms-blue:      #0078D4;
  --ms-blue-dark: #005A9E;
  --ms-blue-soft: #E5F1FB;
  --ink:          #201F1E;
  --ink-2:        #3B3A39;
  --muted:        #605E5C;
  --muted-2:      #797775;
  --line:         #EDEBE9;
  --line-2:       #E1DFDD;
  --bg:           #FAF9F8;
  --bg-card:      #FFFFFF;
  --accent:       var(--ms-blue);
  --radius:       10px;
  --radius-lg:    16px;
  --shadow-sm:    0 1px 2px rgba(0,0,0,.06), 0 1px 1px rgba(0,0,0,.04);
  --shadow-md:    0 2px 8px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg:    0 8px 28px rgba(0,0,0,.12);
  --maxw:         1180px;
  --font: "Segoe UI", "Segoe UI Web (West European)", -apple-system, BlinkMacSystemFont,
          "Malgun Gothic", "Apple SD Gothic Neo", Roboto, Helvetica, Arial, sans-serif;
  --mono: "Cascadia Code", "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

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

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand:hover { text-decoration: none; }
.brand-mark { display: inline-flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text strong { font-size: 15px; color: var(--ink); letter-spacing: -.01em; }
.brand-text em { font-style: normal; font-size: 11px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }

.site-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.site-nav a { padding: 8px 12px; border-radius: 6px; font-size: 14px; font-weight: 600; color: var(--ink-2); }
.site-nav a:hover { background: var(--bg); color: var(--ms-blue-dark); text-decoration: none; }
.site-nav .nav-cta { color: var(--ms-blue-dark); }

.nav-toggle { display: none; margin-left: auto; width: 40px; height: 40px; border: 1px solid var(--line-2);
  background: #fff; border-radius: 8px; cursor: pointer; flex-direction: column; gap: 4px; align-items: center; justify-content: center; }
.nav-toggle span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1100px 380px at 78% -10%, rgba(0,120,212,.16), transparent 60%),
    radial-gradient(900px 360px at 8% 0%, rgba(94,95,199,.12), transparent 55%),
    linear-gradient(180deg, #fff 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}
.hero-inner { padding: 64px 24px 56px; max-width: var(--maxw); margin: 0 auto; }
.hero-eyebrow { margin: 0 0 10px; font-weight: 700; font-size: 13px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ms-blue-dark); }
.hero-title { margin: 0 0 14px; font-size: clamp(30px, 4.4vw, 50px); line-height: 1.1;
  letter-spacing: -.022em; font-weight: 700; color: var(--ink); }
.hero-lead { margin: 0; max-width: 720px; font-size: 18px; color: var(--ink-2); }
.hero-actions { margin: 26px 0 0; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-stats { margin: 36px 0 0; padding: 0; list-style: none; display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 28px; color: var(--ms-blue-dark); letter-spacing: -.02em; }
.hero-stats span { font-size: 13px; color: var(--muted); font-weight: 600; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border-radius: 8px;
  font-weight: 600; font-size: 15px; cursor: pointer; transition: transform .06s ease, box-shadow .15s ease, background .15s ease; }
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ms-blue); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--ms-blue-dark); }
.btn-ghost { background: #fff; color: var(--ink); border: 1px solid var(--line-2); }
.btn-ghost:hover { border-color: var(--ms-blue); color: var(--ms-blue-dark); }

/* ---------- Modules / cards ---------- */
.module { padding: 52px 0; border-bottom: 1px solid var(--line); }
.module:last-of-type { border-bottom: 0; }
.module-head { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 26px;
  border-left: 4px solid var(--accent); padding-left: 18px; }
.module-icon { font-size: 30px; line-height: 1.2; }
.module-titlerow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.module-meta h2 { margin: 0; font-size: 24px; letter-spacing: -.02em; color: var(--ink); }
.module-meta p { margin: 8px 0 0; color: var(--muted); max-width: 760px; font-size: 15px; }
.module-badge { background: color-mix(in srgb, var(--accent) 14%, #fff);
  color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 30%, #fff);
  font-size: 11.5px; font-weight: 700; padding: 3px 10px; border-radius: 999px; letter-spacing: .03em; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 18px; }
.card { display: flex; flex-direction: column; background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 22px 22px 20px; box-shadow: var(--shadow-sm);
  transition: transform .12s ease, box-shadow .16s ease, border-color .16s ease; position: relative; overflow: hidden; }
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--accent); opacity: .9; }
.card:hover { text-decoration: none; transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-time { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.card-title { margin: 0 0 8px; font-size: 18px; color: var(--ink); letter-spacing: -.01em; }
.card-summary { margin: 0 0 16px; color: var(--ink-2); font-size: 14px; flex: 1; }
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.tag { font-size: 11.5px; font-weight: 600; color: var(--muted); background: var(--bg);
  border: 1px solid var(--line-2); border-radius: 6px; padding: 2px 8px; }
.card-cta { font-size: 14px; font-weight: 700; color: var(--accent); }

.level { font-size: 11.5px; font-weight: 700; padding: 3px 9px; border-radius: 999px; letter-spacing: .02em; }
.level-100 { background:#E8F5E9; color:#2E7D32; }
.level-200 { background:#E3F2FD; color:#1565C0; }
.level-300 { background:#FFF3E0; color:#E65100; }
.level-400 { background:#FDECEA; color:#C62828; }

.module-coming .coming-note { background: #fff; border: 1px dashed var(--line-2); border-radius: var(--radius);
  padding: 20px 22px; color: var(--muted); font-size: 14.5px; }
.coming-note code { background: var(--bg); padding: 2px 6px; border-radius: 5px; font-family: var(--mono); font-size: 13px; color: var(--ink-2); }

/* ---------- Editions (Classic vs New) ---------- */
.edition { padding: 14px 0 8px; }
.edition + .edition { margin-top: 8px; }
.edition-head { display: flex; gap: 16px; align-items: flex-start; padding: 26px 24px;
  border-radius: var(--radius-lg); margin: 28px 0 8px; border: 1px solid var(--line); }
.edition-classic { background: linear-gradient(180deg, #EAF3FB, #fff); border-color: #CFE4F7; }
.edition-new { background: linear-gradient(180deg, #F0EEFB, #fff); border-color: #DAD4F4; }
.edition-workshop { background: linear-gradient(180deg, #E9F7F0, #fff); border-color: #C7E9D9; }
.edition-resources { background: linear-gradient(180deg, #FBEEF3, #fff); border-color: #F0CEDC; }
.edition-tag { flex: none; align-self: center; font-size: 12px; font-weight: 800; letter-spacing: .04em;
  padding: 7px 14px; border-radius: 999px; color: #fff; white-space: nowrap; }
.edition-classic .edition-tag { background: var(--ms-blue); }
.edition-new .edition-tag { background: #5B5FC7; }
.edition-workshop .edition-tag { background: #107C10; }
.edition-resources .edition-tag { background: #B11F4B; }
.edition-title { margin: 0; font-size: 22px; letter-spacing: -.02em; color: var(--ink); display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.edition-sub { font-size: 13.5px; font-weight: 600; color: var(--muted); letter-spacing: 0; }
.edition-desc { margin: 8px 0 0; color: var(--ink-2); font-size: 14.5px; max-width: 820px; }
.edition .module { padding: 34px 0; }
.edition .card-grid { margin-top: 6px; }

/* Module summary cards (home → drill-down) */
.module-card .card-top { align-items: center; }
.module-card-icon { font-size: 26px; line-height: 1; }
.module-card .card-title { font-size: 18.5px; margin-top: 2px; }
.card-coming { border-style: dashed; background: #fff; }
.card-coming::before { opacity: .35; }
.card-cta-muted { color: var(--muted); }
.module-detail { padding: 40px 0 64px; }
.module-detail .lab-source { margin-top: 30px; }

/* ---------- Author ---------- */
.author-section { padding: 40px 0 60px; border-top: 1px solid var(--line); margin-top: 16px; }
.author-card { display: flex; gap: 22px; align-items: flex-start; background: var(--bg-card);
  border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-sm); }
.author-avatar { flex: none; width: 64px; height: 64px; border-radius: 50%;
  background: linear-gradient(135deg, var(--ms-blue), #5B5FC7); color: #fff;
  display: grid; place-items: center; font-size: 26px; font-weight: 700; }
.author-eyebrow { margin: 0 0 4px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--muted-2); }
.author-name { margin: 0; font-size: 22px; color: var(--ink); letter-spacing: -.01em; }
.author-name-kr { font-size: 16px; font-weight: 600; color: var(--muted); margin-left: 6px; }
.author-role { margin: 4px 0 12px; font-size: 14px; font-weight: 600; color: var(--ms-blue-dark); }
.author-bio { margin: 0 0 16px; color: var(--ink-2); font-size: 14.5px; max-width: 720px; }
.author-links { display: flex; gap: 10px; flex-wrap: wrap; }
.author-links a { font-size: 13.5px; font-weight: 600; color: var(--ms-blue-dark);
  border: 1px solid var(--line-2); border-radius: 8px; padding: 6px 12px; }
.author-links a:hover { border-color: var(--ms-blue); text-decoration: none; }

/* Nav preview pill + edition badges */
.nav-pill { font-size: 9.5px; font-weight: 800; letter-spacing: .04em; background: #5B5FC7; color: #fff;
  padding: 1px 6px; border-radius: 999px; vertical-align: middle; margin-left: 3px; }
.badge-edition { font-weight: 800; color: #fff; border: 0; }
.badge-edition-classic { background: var(--ms-blue); }
.badge-edition-new { background: #5B5FC7; }
.badge-edition-workshop { background: #107C10; }

/* ---------- Lab page ---------- */
.lab-banner { background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 9%, #fff), #fff);
  border-bottom: 1px solid var(--line); padding: 30px 0 26px; }
.breadcrumb { font-size: 13px; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.breadcrumb span[aria-current] { color: var(--ink-2); font-weight: 600; }
.lab-title { margin: 0; font-size: clamp(26px, 3.6vw, 38px); line-height: 1.14; letter-spacing: -.02em; color: var(--ink); }
.lab-summary { margin: 12px 0 0; color: var(--ink-2); font-size: 16.5px; max-width: 820px; }
.lab-badges { margin-top: 18px; display: flex; gap: 8px; flex-wrap: wrap; }
.badge { background: #fff; border: 1px solid var(--line-2); color: var(--ink-2);
  font-size: 12.5px; font-weight: 600; padding: 4px 11px; border-radius: 999px; }
.badge-tag { background: var(--bg); color: var(--muted); }

.lab-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 48px; padding-top: 38px; padding-bottom: 64px; align-items: start; }
.lab-content { min-width: 0; }

/* TOC */
.lab-toc { position: relative; }
.toc-sticky { position: sticky; top: 80px; max-height: calc(100vh - 110px); overflow-y: auto;
  padding: 18px 16px; background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.toc-title { margin: 0 0 12px; padding-bottom: 10px; font-size: 12.5px; font-weight: 800;
  text-transform: uppercase; letter-spacing: .08em; color: var(--ink); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 7px; }
.toc-title::before { content: "📑"; font-size: 14px; }
#toc ul { list-style: none; margin: 0; padding: 0; }
#toc li { margin: 0; }
#toc a { display: block; padding: 6px 10px; font-size: 13.5px; color: var(--muted); border-radius: 6px; border-left: 2px solid var(--line-2); margin-left: -1px; line-height: 1.4; }
#toc a:hover { color: var(--ms-blue-dark); background: var(--bg); text-decoration: none; border-left-color: var(--ms-blue); }
#toc a.active { color: var(--ms-blue-dark); font-weight: 700; border-left-color: var(--ms-blue); background: var(--ms-blue-soft); }
#toc .toc-h3 a { padding-left: 22px; font-size: 13px; }

/* pager + source */
.lab-pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--line); }
.pager { display: flex; flex-direction: column; gap: 3px; max-width: 48%; padding: 14px 18px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow-sm); }
.pager:hover { text-decoration: none; border-color: var(--ms-blue); box-shadow: var(--shadow-md); }
.pager.next { text-align: right; margin-left: auto; }
.pager-dir { font-size: 12px; color: var(--muted); font-weight: 600; }
.pager-title { font-size: 14.5px; color: var(--ink); font-weight: 600; }
.lab-source { margin-top: 24px; font-size: 14px; }

/* ---------- Markdown body ---------- */
.markdown-body { font-size: 16px; color: var(--ink-2); }
.markdown-body h1 { font-size: 28px; margin: 36px 0 14px; letter-spacing: -.02em; color: var(--ink); }
.markdown-body h2 { font-size: 23px; margin: 40px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--line); letter-spacing: -.015em; color: var(--ink); scroll-margin-top: 80px; }
.markdown-body h3 { font-size: 19px; margin: 30px 0 10px; color: var(--ink); scroll-margin-top: 80px; }
.markdown-body h4 { font-size: 16.5px; margin: 24px 0 8px; color: var(--ink); }
.markdown-body p { margin: 14px 0; }
.markdown-body ul, .markdown-body ol { margin: 14px 0; padding-left: 26px; }
.markdown-body li { margin: 6px 0; }
.markdown-body li > ul, .markdown-body li > ol { margin: 6px 0; }
.markdown-body a { color: var(--ms-blue-dark); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.markdown-body strong { color: var(--ink); font-weight: 700; }
.markdown-body img { display: block; margin: 18px 0; border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow-sm); }
.markdown-body hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }

.markdown-body blockquote { margin: 18px 0; padding: 12px 18px; border-left: 4px solid var(--ms-blue);
  background: var(--ms-blue-soft); border-radius: 0 8px 8px 0; color: var(--ink-2); }
.markdown-body blockquote p { margin: 6px 0; }

.markdown-body code { font-family: var(--mono); font-size: .9em; background: #F3F2F1; color: #BC2F00;
  padding: 2px 6px; border-radius: 5px; border: 1px solid var(--line); }
.markdown-body pre { background: #1E1E1E; color: #E6E6E6; padding: 16px 18px; border-radius: 10px;
  overflow-x: auto; margin: 18px 0; font-size: 13.5px; line-height: 1.6; }
.markdown-body pre code { background: none; color: inherit; border: 0; padding: 0; font-size: inherit; }

.markdown-body table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14.5px; display: block; overflow-x: auto; }
.markdown-body th, .markdown-body td { border: 1px solid var(--line-2); padding: 9px 13px; text-align: left; vertical-align: top; }
.markdown-body th { background: var(--bg); font-weight: 700; color: var(--ink); }
.markdown-body tr:nth-child(even) td { background: #FCFBFA; }

/* ---------- Footer ---------- */
.site-footer { background: #FAF9F8; border-top: 1px solid var(--line); margin-top: 20px; }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding: 36px 24px 18px; }
.footer-brand strong { font-size: 16px; color: var(--ink); }
.footer-brand p { margin: 6px 0 0; color: var(--muted); font-size: 14px; max-width: 360px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; align-items: flex-start; }
.footer-links a { color: var(--ink-2); font-size: 14px; font-weight: 600; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 14px 24px 30px; border-top: 1px solid var(--line); color: var(--muted-2); font-size: 12.5px; }
.footer-bottom a { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .lab-layout { grid-template-columns: 1fr; gap: 0; }
  .lab-toc { display: none; }
}
@media (max-width: 760px) {
  .nav-toggle { display: flex; }
  .site-nav { position: fixed; inset: 60px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 0; background: #fff; border-bottom: 1px solid var(--line); padding: 8px 16px 16px;
    box-shadow: var(--shadow-md); transform: translateY(-130%); transition: transform .2s ease; }
  body.nav-open .site-nav { transform: translateY(0); }
  .site-nav a { padding: 12px 8px; border-bottom: 1px solid var(--line); }
  .hero-stats { gap: 26px; }
  .pager { max-width: 100%; }
  .lab-pager { flex-direction: column; }
  .edition-head { flex-direction: column; gap: 12px; padding: 20px; }
  .edition-tag { align-self: flex-start; }
  .author-card { flex-direction: column; gap: 16px; padding: 22px; }
}