/* Shared styles for the Copilot CLI partner course (landing + lesson pages) */

:root {
  --fg: #0b0b0d;
  --fg-muted: #5a5a66;
  --bg: #fafafa;
  --bg-soft: #f4f4f7;
  --card: #fff;
  --accent: #2D6E6D;
  --accent-light: #EEF4F4;
  --accent-deep: #1f4f4e;
  --tech: #6e40c9;
  --tech-light: #f3edff;
  --border: #e5e7eb;
  --warn: #c4700a;
  --warn-bg: #FFF7ED;
  --warn-border: #FDDCAB;
  --success: #16803C;
  --success-bg: #F0FDF4;
  --success-border: #BBF7D0;
  --code-bg: #1e1e2e;
  --code-fg: #cdd6f4;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

/* ── Top nav (shared by landing + lesson) ── */
.topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250,250,250,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topnav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.topnav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.005em;
}
.topnav-brand .brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 13px;
  font-weight: 700;
}
.topnav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.topnav-links a {
  color: var(--fg-muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.topnav-links a:hover { background: var(--accent-light); color: var(--accent); }
.topnav-links a.is-active { color: var(--accent); background: var(--accent-light); }
@media (max-width: 720px) {
  .topnav-links a:not(.always-visible) { display: none; }
}

/* ── Landing hero ── */
.hero {
  max-width: 880px;
  margin: 0 auto;
  padding: 64px 24px 32px;
  text-align: center;
}
.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero h1 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  text-wrap: balance;
}
.hero p.lead {
  font-size: 19px;
  color: var(--fg-muted);
  line-height: 1.55;
  max-width: 60ch;
  margin: 0 auto 32px;
  text-wrap: pretty;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 9px;
  font-weight: 600;
  text-decoration: none;
  font-size: 15px;
  transition: transform .15s, box-shadow .15s, background .15s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(45,110,109,0.25); }
.btn-secondary {
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ── Stats row ── */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 720px;
  margin: 0 auto 56px;
  padding: 0 24px;
}
@media (max-width: 600px) { .stats { grid-template-columns: 1fr; } }
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
}
.stat-value {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.01em;
}
.stat-label { font-size: 13px; color: var(--fg-muted); margin-top: 2px; }

/* ── Section ── */
section.block {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 24px;
}
.section-h {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}
.section-sub { color: var(--fg-muted); margin: 0 0 28px; }

/* ── Feature grid (What you'll learn) ── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.feature .emoji { font-size: 26px; display: block; margin-bottom: 10px; }
.feature h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 6px;
}
.feature p { font-size: 14px; color: var(--fg-muted); margin: 0; line-height: 1.5; }

/* ── Prereq checklist ── */
.prereqs { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 24px 28px; }
.prereqs ul { list-style: none; padding: 0; margin: 0; }
.prereqs li { padding: 8px 0; padding-left: 28px; position: relative; font-size: 15px; }
.prereqs li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}
.prereqs li code, .prereqs li a code { background: #f0f0f5; padding: 2px 6px; border-radius: 4px; font-size: 13px; color: var(--fg); }
.prereqs li a { color: var(--accent); }

/* ── Lessons list (landing) ── */
.lessons { display: flex; flex-direction: column; gap: 12px; }
.lesson-card {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 18px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 22px;
  text-decoration: none;
  color: var(--fg);
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.lesson-card:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(0,0,0,0.04); }
.lesson-num {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  text-align: center;
  background: var(--accent-light);
  border-radius: 10px;
  padding: 10px 0;
}
.lesson-card.is-optional .lesson-num { color: var(--tech); background: var(--tech-light); }
.lesson-body h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 4px;
}
.lesson-body p { margin: 0; font-size: 14px; color: var(--fg-muted); line-height: 1.5; }
.lesson-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; font-size: 12px; }
.lesson-meta .time { color: var(--fg-muted); }
.lesson-meta .badge {
  background: var(--tech-light);
  color: var(--tech);
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
@media (max-width: 600px) {
  .lesson-card { grid-template-columns: 48px 1fr; }
  .lesson-meta { grid-column: 1 / -1; flex-direction: row; align-items: center; justify-content: space-between; }
}

/* Optional band (callout above the optional lessons) */
.optional-band {
  background: var(--tech-light);
  border: 1px solid #e0d4f7;
  border-radius: 12px;
  padding: 14px 18px;
  margin: 24px 0 12px;
  font-size: 14px;
  color: var(--fg);
}
.optional-band strong { color: var(--tech); }

/* ── Landing-page list extras ── */
.prereqs-note {
  margin: 16px 0 0;
  padding: 12px 16px;
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  font-size: 14px;
  color: var(--fg);
}
.help-list, .diff-list {
  margin: 0;
  padding-left: 22px;
  font-size: 15px;
  color: var(--fg);
}
.help-list li, .diff-list li {
  margin: 6px 0;
  line-height: 1.55;
}
.help-list a, .diff-list a { color: var(--accent); }

/* ── Footer ── */
footer.site-foot {
  border-top: 1px solid var(--border);
  margin-top: 64px;
  padding: 32px 24px;
  color: var(--fg-muted);
  font-size: 13px;
  text-align: center;
}
footer.site-foot a { color: var(--accent); }

/* ──────────────────────────────────────────────── */
/* ── Lesson page layout (sidebar + main content) ── */
/* ──────────────────────────────────────────────── */

.lesson-shell {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  padding: 24px;
}
@media (max-width: 920px) {
  .lesson-shell { grid-template-columns: 1fr; gap: 0; padding: 16px; }
}

.sidebar {
  position: sticky;
  top: 72px;
  align-self: start;
  max-height: calc(100vh - 88px);
  overflow-y: auto;
  padding-right: 8px;
}
@media (max-width: 920px) {
  .sidebar {
    position: static;
    max-height: none;
    margin: 12px 0 24px;
    padding: 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
  }
}
.sidebar-h {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  margin: 0 0 10px;
}
.sidebar ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: lesson;
}
.sidebar li { counter-increment: lesson; }
.sidebar li a {
  display: block;
  padding: 8px 12px 8px 38px;
  border-radius: 7px;
  text-decoration: none;
  color: var(--fg);
  font-size: 14px;
  line-height: 1.4;
  position: relative;
  margin-bottom: 2px;
}
.sidebar li a::before {
  content: counter(lesson);
  position: absolute;
  left: 12px;
  top: 8px;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--fg-muted);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.sidebar li a:hover { background: var(--accent-light); color: var(--accent); }
.sidebar li a:hover::before { background: var(--accent); color: #fff; }
.sidebar li.is-optional a::before { background: var(--tech-light); color: var(--tech); }
.sidebar li a.is-current {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}
.sidebar li a.is-current::before { background: var(--accent); color: #fff; }
.sidebar-foot {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}
.sidebar-foot a { color: var(--fg-muted); text-decoration: none; padding: 4px 12px; display: block; border-radius: 6px; }
.sidebar-foot a:hover { background: var(--bg-soft); color: var(--accent); }

/* ── Main content area ── */
.main { min-width: 0; }
.crumb {
  font-size: 13px;
  color: var(--fg-muted);
  margin-bottom: 12px;
}
.crumb a { color: var(--fg-muted); text-decoration: none; }
.crumb a:hover { color: var(--accent); }

.lesson-head {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.lesson-eyebrow {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 8px;
}
.lesson-eyebrow.is-optional { color: var(--tech); }
.main h1.lesson-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: clamp(30px, 3.6vw, 42px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.018em;
  margin: 0 0 14px;
  text-wrap: balance;
}
.lesson-meta-row { display: flex; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--fg-muted); }
.lesson-meta-row .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.lesson-meta-row strong { color: var(--fg); font-weight: 600; }

/* ── Markdown body ── */
.body { font-size: 16px; line-height: 1.7; }
.body h2 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.012em;
  margin: 40px 0 14px;
  scroll-margin-top: 80px;
}
.body h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 10px;
  scroll-margin-top: 80px;
}
.body p, .body li { font-size: 16px; }
.body ul, .body ol { padding-left: 22px; }
.body li { margin-bottom: 6px; }
.body a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
.body a:hover { color: var(--accent-deep); }
.body hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }
.body strong { font-weight: 700; }
.body img { max-width: 100%; height: auto; border-radius: 8px; }

/* Code (inline + blocks) */
.body code {
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 14px;
}
.body p code, .body li code, .body td code, .body h2 code, .body h3 code {
  background: #f0f0f5;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--fg);
}
.body pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 10px;
  padding: 16px 20px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.55;
  margin: 16px 0;
}
.body pre code { background: transparent; padding: 0; color: inherit; font-size: 14px; }

/* Tables */
.body table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
.body th, .body td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.body th { background: var(--bg-soft); font-weight: 700; }
.body tbody tr:hover { background: var(--bg-soft); }

/* Blockquotes used as callouts */
.body blockquote {
  margin: 16px 0;
  padding: 14px 18px;
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  color: var(--fg);
}
.body blockquote p { margin: 6px 0; }
.body blockquote p:first-child { margin-top: 0; }
.body blockquote p:last-child { margin-bottom: 0; }

/* Details/summary collapsibles */
.body details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 14px 0;
}
.body details[open] { box-shadow: 0 2px 8px rgba(0,0,0,0.03); }
.body summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent);
  list-style: none;
  position: relative;
  padding-left: 22px;
}
.body summary::-webkit-details-marker { display: none; }
.body summary::before {
  content: "▸";
  position: absolute;
  left: 0;
  transition: transform .15s;
  color: var(--accent);
}
.body details[open] summary::before { transform: rotate(90deg); }

/* Prev/Next nav */
.lesson-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
@media (max-width: 600px) { .lesson-nav { grid-template-columns: 1fr; } }
.lesson-nav a {
  display: block;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--fg);
  transition: border-color .15s, transform .15s;
}
.lesson-nav a:hover { border-color: var(--accent); transform: translateY(-1px); }
.lesson-nav .nav-dir {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  margin-bottom: 4px;
  font-weight: 600;
}
.lesson-nav .nav-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 16px;
}
.lesson-nav a.next { text-align: right; }
.lesson-nav a.prev::before { content: "← "; color: var(--accent); }
.lesson-nav a.next .nav-title::after { content: " →"; color: var(--accent); }
.lesson-nav .nav-spacer { visibility: hidden; }


/* ── v1.1 polish: fake terminal window ── */
.term {
  background: #1e1e2e;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12), 0 0 0 1px rgba(255,255,255,0.04);
  margin: 18px 0;
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #181825;
  padding: 9px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.term-bar .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}
.term-bar .dot.red { background: #ff5f56; }
.term-bar .dot.yellow { background: #ffbd2e; }
.term-bar .dot.green { background: #27c93f; }
.term-bar .term-title {
  margin-left: 10px;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 12px;
  color: #a6adc8;
  letter-spacing: 0.02em;
}
.term-body {
  padding: 16px 18px;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--code-fg);
  margin: 0;
  overflow-x: auto;
  white-space: pre;
}
.term-body .prompt { color: #5DA9D9; }
.term-body .cmd { color: #f5f5f5; }
.term-body .out { color: #a6adc8; }
.term-body .accent { color: #C7A8FF; }
.term-body .ok { color: #a6e3a1; }
.term-body .warn { color: #f9e2af; }

/* ── v1.1 polish: numbered flow cards (Device Auth Flow style) ── */
.flow-cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin: 24px 0 8px;
}
@media (max-width: 900px) {
  .flow-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .flow-cards { grid-template-columns: 1fr; }
}
.flow-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 16px 16px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.flow-card .flow-num {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, #8957E5 0%, #4493F8 100%);
  color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(137,87,229,0.3);
}
.flow-card .flow-icon { font-size: 22px; line-height: 1; }
.flow-card .flow-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  margin: 2px 0 0;
  color: var(--fg);
}
.flow-card .flow-desc {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.45;
  margin: 0;
}
.flow-caption {
  font-size: 13px;
  color: var(--fg-muted);
  text-align: center;
  margin: 4px 0 18px;
  font-style: italic;
}

/* ── v1.1 polish: Go deeper callout ── */
.go-deeper {
  background: linear-gradient(135deg, rgba(137,87,229,0.06) 0%, rgba(68,147,248,0.06) 100%);
  border: 1px solid rgba(137,87,229,0.25);
  border-radius: 12px;
  padding: 22px 24px;
  margin: 36px 0 24px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.go-deeper .go-deeper-icon {
  font-size: 28px;
  flex-shrink: 0;
  line-height: 1;
}
.go-deeper-body { flex: 1; }
.go-deeper-label {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #6e40c9;
  margin: 0 0 4px;
}
.go-deeper-body h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--fg);
}
.go-deeper-body p {
  font-size: 14.5px;
  color: var(--fg-muted);
  margin: 0 0 10px;
  line-height: 1.55;
}
.go-deeper-body a.go-deeper-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: #6e40c9;
  text-decoration: none;
  padding: 8px 14px;
  background: #fff;
  border: 1px solid rgba(110,64,201,0.25);
  border-radius: 8px;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}
.go-deeper-body a.go-deeper-link:hover {
  background: #f3edff;
  border-color: rgba(110,64,201,0.5);
  transform: translateY(-1px);
}

/* ── v1.1 polish: lesson hero image ── */
.lesson-hero-image {
  width: 100%;
  max-width: 480px;
  height: auto;
  border-radius: 12px;
  margin: 12px auto 24px;
  display: block;
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
}