/* ==========================================================================
   Root & Route — design tokens
   Concept: a topographic field-guide for people navigating IT terrain.
   ========================================================================== */

:root {
  /* Color */
  --paper:        #EEF2ED;   /* base background, cool map paper */
  --paper-alt:    #E3E9E1;   /* card / alt panel background */
  --ink:          #16202A;   /* primary text, deep slate ink */
  --ink-soft:     #45535C;   /* secondary text */
  --contour:      #A9B8AE;   /* topo contour lines, hairlines */
  --contour-soft: #C9D2C6;
  --trail:        #1D6F62;   /* primary accent — trail teal */
  --trail-dark:   #124B42;
  --marker:       #B8672B;   /* secondary accent — marker amber */
  --marker-soft:  #E7C9AC;
  --paper-dark:   #0F1B22;   /* inverted sections */
  --ink-on-dark:  #EAF0EC;

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;

  /* Layout */
  --max: 1120px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 3px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---- Typography helpers -------------------------------------------- */

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0; color: var(--ink); }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.3rem; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--trail-dark);
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  background: var(--marker);
  border-radius: 50%;
  display: inline-block;
}

p.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 46ch; }

/* ---- Header ---------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--contour);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 40;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
}
.logo .amp { color: var(--marker); font-style: italic; }

.main-nav { display: flex; align-items: center; gap: 2rem; }
.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
}
.main-nav a:hover, .main-nav a.active { color: var(--ink); }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -3px;
  height: 2px;
  background: var(--marker);
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ink);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.5em 0.8em;
  cursor: pointer;
  color: var(--ink);
}

@media (max-width: 720px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--contour);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.2rem var(--gutter);
    gap: 1rem;
  }
  .main-nav.is-open { display: flex; }
  .nav-toggle { display: inline-block; }
}

/* ---- Buttons ---------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85em 1.4em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn-primary { background: var(--trail); color: #fff; }
.btn-primary:hover { background: var(--trail-dark); transform: translateY(-1px); }
.btn-ghost { border-color: var(--ink); color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-arrow::after { content: "→"; }

/* ---- Hero -------------------------------------------------------------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 4.5rem 0 3.5rem;
  border-bottom: 1px solid var(--contour);
}
.contour-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.55;
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }
.hero-inner { max-width: 640px; }
.hero h1 { margin-top: 0.9rem; }
.hero .lede { margin-top: 1.1rem; }
.hero-ctas { display: flex; gap: 1rem; margin-top: 2.1rem; flex-wrap: wrap; }

/* Difficulty legend strip */
.legend {
  margin-top: 3.2rem;
  display: flex;
  gap: 1.6rem;
  flex-wrap: wrap;
  border-top: 1px dashed var(--contour);
  padding-top: 1.4rem;
}
.legend-item { display: flex; align-items: center; gap: 0.55rem; font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-soft); }
.legend-dot { width: 9px; height: 9px; border-radius: 50%; }

/* Tier colors */
.tier-basecamp  { background: #6FA98A; }
.tier-trailhead { background: #3E8F7C; }
.tier-ridge     { background: #B8672B; }
.tier-summit    { background: #7A3B1E; }

/* ---- Waypoints (content pillars) --------------------------------------- */

.waypoints { padding: 4.5rem 0; border-bottom: 1px solid var(--contour); }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.4rem; }
.waypoint-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--contour);
}
.waypoint-card {
  padding: 1.8rem 1.6rem;
  border-right: 1px solid var(--contour);
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
  transition: background 0.2s ease;
  display: flex;
  flex-direction: column;
  min-height: 220px;
}
.waypoint-card:last-child { border-right: none; }
.waypoint-card:hover { background: var(--paper-alt); }
.waypoint-num { font-family: var(--font-mono); font-size: 0.78rem; color: var(--marker); letter-spacing: 0.06em; }
.waypoint-card h3 { margin-top: 0.9rem; }
.waypoint-card p { color: var(--ink-soft); font-size: 0.92rem; margin-top: 0.6rem; flex: 1; }
.waypoint-go { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; color: var(--trail-dark); margin-top: 1rem; }

@media (max-width: 900px) {
  .waypoint-grid { grid-template-columns: repeat(2, 1fr); }
  .waypoint-card { border-bottom: 1px solid var(--contour); }
}
@media (max-width: 560px) {
  .waypoint-grid { grid-template-columns: 1fr; }
}

/* ---- Trail log (post list) --------------------------------------------- */

.trail-log { padding: 4.5rem 0; }
.post-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 1.8rem;
  align-items: start;
  padding: 1.9rem 0;
  border-top: 1px solid var(--contour);
  text-decoration: none;
  color: var(--ink);
}
.trail-log .post-row:last-child { border-bottom: 1px solid var(--contour); }
.post-meta-col { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); padding-top: 0.3rem; }
.post-row h3 { margin-bottom: 0.5rem; }
.post-row p { color: var(--ink-soft); font-size: 0.95rem; margin: 0; max-width: 60ch; }
.post-tags { display: flex; gap: 0.5rem; margin-top: 0.7rem; flex-wrap: wrap; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25em 0.6em;
  border-radius: 2px;
  background: var(--paper-alt);
  color: var(--ink-soft);
  border: 1px solid var(--contour-soft);
}
.badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.3em 0.7em;
  border-radius: 2px;
  color: #fff;
  display: inline-block;
  white-space: nowrap;
}
.badge-basecamp  { background: #6FA98A; }
.badge-trailhead { background: #3E8F7C; }
.badge-ridge     { background: #B8672B; }
.badge-summit    { background: #7A3B1E; }
.trek-time { text-align: right; color: var(--ink-soft); font-family: var(--font-mono); font-size: 0.76rem; padding-top: 0.3rem; }

@media (max-width: 720px) {
  .post-row { grid-template-columns: 1fr; gap: 0.6rem; }
  .trek-time { text-align: left; }
}

/* ---- Filter bar (trail log page) --------------------------------------- */

.filter-bar { display: flex; gap: 0.6rem; flex-wrap: wrap; margin: 2rem 0 0.5rem; }
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.55em 1em;
  border: 1px solid var(--contour);
  background: var(--paper);
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: 2px;
}
.filter-btn.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---- Newsletter / footer CTA -------------------------------------------- */

.dispatch {
  background: var(--paper-dark);
  color: var(--ink-on-dark);
  padding: 4rem 0;
}
.dispatch .wrap { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.dispatch h2 { color: var(--ink-on-dark); max-width: 30ch; }
.dispatch p { color: #B7C4BE; max-width: 40ch; }
.dispatch-form { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.dispatch-form input {
  background: transparent;
  border: 1px solid #3A4C46;
  color: var(--ink-on-dark);
  padding: 0.85em 1.1em;
  font-family: var(--font-body);
  border-radius: 2px;
  min-width: 240px;
}
.dispatch-form input::placeholder { color: #8A9993; }

/* ---- Footer -------------------------------------------------------------- */

footer.site-footer { padding: 2.4rem 0; }
footer.site-footer .wrap {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem;
}
footer.site-footer nav { display: flex; gap: 1.4rem; }
footer.site-footer a { text-decoration: none; font-size: 0.85rem; color: var(--ink-soft); }
footer .fine {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
}

/* ---- Post page ----------------------------------------------------------- */

.post-hero { padding: 3.5rem 0 2.5rem; border-bottom: 1px solid var(--contour); }
.post-hero .meta-row { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.4rem; flex-wrap: wrap; }
.post-hero h1 { max-width: 22ch; }
.post-hero .dek { margin-top: 1rem; }
.byline { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-soft); margin-top: 1.6rem; }

.post-body { padding: 3rem 0 5rem; }
.post-body .content { max-width: 680px; margin: 0 auto; }
.content h2 { margin-top: 2.6rem; margin-bottom: 0.9rem; font-size: 1.5rem; }
.content h3 { margin-top: 2rem; margin-bottom: 0.6rem; font-size: 1.15rem; }
.content p { margin: 1.1rem 0; color: var(--ink); font-size: 1.05rem; }
.content ul, .content ol { color: var(--ink); font-size: 1.05rem; padding-left: 1.3rem; }
.content li { margin: 0.5rem 0; }
.content blockquote {
  border-left: 3px solid var(--marker);
  margin: 1.8rem 0;
  padding: 0.3rem 0 0.3rem 1.3rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--ink-soft);
}
.content code {
  font-family: var(--font-mono);
  background: var(--paper-alt);
  padding: 0.15em 0.4em;
  border-radius: 2px;
  font-size: 0.9em;
}
.content pre {
  background: var(--paper-dark);
  color: var(--ink-on-dark);
  padding: 1.2rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.55;
}
.content pre code { background: none; padding: 0; }
.callout {
  background: var(--paper-alt);
  border: 1px solid var(--contour-soft);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  margin: 2rem 0;
  font-size: 0.98rem;
}
.callout .eyebrow { margin-bottom: 0.5rem; }
hr.divider {
  border: none;
  border-top: 1px dashed var(--contour);
  margin: 3rem 0;
}

.next-waypoint {
  max-width: 680px;
  margin: 0 auto;
  padding-top: 2.5rem;
  border-top: 1px solid var(--contour);
}
.next-waypoint a {
  text-decoration: none;
  display: block;
  padding: 1.6rem;
  border: 1px solid var(--contour);
  transition: background 0.2s ease;
}
.next-waypoint a:hover { background: var(--paper-alt); }

/* ---- About page --------------------------------------------------------- */

.about-hero { padding: 4rem 0 2rem; }
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 3rem; padding-bottom: 4rem; }
.about-grid p { color: var(--ink-soft); font-size: 1.02rem; }
.stat-block { border: 1px solid var(--contour); padding: 1.6rem; }
.stat-block + .stat-block { border-top: none; }
.stat-block .num { font-family: var(--font-display); font-size: 1.9rem; color: var(--trail-dark); }
.stat-block .lbl { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; color: var(--ink-soft); letter-spacing: 0.05em; }

@media (max-width: 800px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Dark mode ("Night hike")
   ========================================================================== */

html[data-theme="dark"] {
  --paper:        #101A17;
  --paper-alt:    #17231F;
  --ink:          #E7EEE9;
  --ink-soft:     #A4B3AB;
  --contour:      #2C3B35;
  --contour-soft: #23302B;
  --trail:        #3FA08D;
  --trail-dark:   #5FBFA9;
  --marker:       #D98A4B;
  --marker-soft:  #6B4526;
  --paper-dark:   #0A120F;
  --ink-on-dark:  #EAF0EC;
}
html[data-theme="dark"] body { background: var(--paper); color: var(--ink); }
html[data-theme="dark"] .contour-bg path { stroke: #2C3B35; }
html[data-theme="dark"] .badge { filter: saturate(0.9) brightness(1.05); }
html { transition: background 0.25s ease; }
body, .site-header, .waypoint-card, .filter-btn, .callout {
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--contour);
  border-radius: 999px;
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  color: var(--ink);
  margin-left: 1rem;
}
.theme-toggle:hover { border-color: var(--ink); }
.header-actions { display: flex; align-items: center; }

/* ==========================================================================
   Reading progress bar (post pages)
   ========================================================================== */

.progress-track {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 60;
  background: transparent;
  pointer-events: none;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--trail), var(--marker));
}

/* ==========================================================================
   Live search (trail log)
   ========================================================================== */

.search-box {
  margin-top: 1.6rem;
  position: relative;
  max-width: 460px;
}
.search-box input {
  width: 100%;
  padding: 0.85em 1.1em 0.85em 2.6em;
  border: 1px solid var(--contour);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
}
.search-box input:focus { outline: 2px solid var(--trail); outline-offset: 1px; }
.search-box::before {
  content: "⌕";
  position: absolute;
  left: 0.95em;
  top: 50%;
  transform: translateY(-52%);
  font-size: 1.1rem;
  color: var(--ink-soft);
}
.no-results {
  display: none;
  padding: 2.5rem 0;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   Back to top
   ========================================================================== */

.to-top {
  position: fixed;
  right: 1.2rem; bottom: 1.2rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--contour);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-size: 1.1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 50;
}
.to-top.show { opacity: 1; pointer-events: auto; }

/* Focus visibility for a11y (part of SEO/Lighthouse score) */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--trail);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6em 1em;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.skip-link:focus { left: 0; }

/* Filter bar: separator between category and tier groups */
.filter-sep{display:inline-block;width:1px;height:1.4rem;background:var(--rule, currentColor);opacity:.25;margin:0 .5rem;vertical-align:middle;}
@media (max-width:640px){.filter-sep{display:block;width:100%;height:1px;margin:.5rem 0;}}

/* =====================
   Quiz — Check Your Bearings
   ===================== */
.quiz-card {
  border: 1px solid var(--contour);
  background: var(--card, transparent);
  border-radius: 12px;
  padding: 1.6rem;
  margin: 1.4rem 0;
}
.quiz-topbar { display: flex; justify-content: space-between; align-items: baseline; margin-top: 1rem; }
.quiz-trail { height: 6px; border-radius: 999px; background: var(--contour); margin: 0.7rem 0 0.4rem; overflow: hidden; }
.quiz-trail-fill { height: 100%; width: 0; background: var(--trail, #1D6F62); border-radius: 999px; transition: width 0.35s ease; }
.quiz-options { display: grid; gap: 0.6rem; margin-top: 1.1rem; }
.quiz-option {
  text-align: left; font: inherit; color: inherit; cursor: pointer;
  padding: 0.85rem 1rem; border-radius: 10px;
  border: 1px solid var(--contour); background: transparent;
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.quiz-option:hover:not(:disabled) { border-color: var(--trail, #1D6F62); transform: translateX(3px); }
.quiz-option:disabled { cursor: default; opacity: 0.75; }
.quiz-option.is-correct { border-color: var(--trail, #1D6F62); box-shadow: inset 0 0 0 1px var(--trail, #1D6F62); opacity: 1; font-weight: 600; }
.quiz-option.is-wrong { border-color: var(--marker, #B8672B); box-shadow: inset 0 0 0 1px var(--marker, #B8672B); opacity: 1; }
.quiz-feedback { border-top: 1px dashed var(--contour); margin-top: 1.2rem; padding-top: 1.1rem; }
.quiz-verdict { font-weight: 600; margin-bottom: 0.4rem; }
.quiz-verdict.ok { color: var(--trail, #1D6F62); }
.quiz-verdict.no { color: var(--marker, #B8672B); }
.quiz-btn {
  display: inline-block; font: inherit; cursor: pointer;
  padding: 0.65rem 1.2rem; border-radius: 999px;
  border: 1px solid var(--contour); background: transparent; color: inherit;
  text-decoration: none; margin-top: 0.9rem;
}
.quiz-btn:hover { border-color: var(--trail, #1D6F62); }
.quiz-btn-primary { background: var(--trail, #1D6F62); border-color: var(--trail, #1D6F62); color: #fff; }
.quiz-btn-primary:hover { filter: brightness(1.08); }
.quiz-card-result { text-align: center; }
.quiz-bigscore { font-family: "Fraunces", serif; font-size: 3rem; margin: 0.4rem 0; color: var(--trail, #1D6F62); }
.quiz-endrow { display: flex; gap: 0.7rem; justify-content: center; flex-wrap: wrap; }
.quiz-review-list { margin: 0.8rem 0 0; padding-left: 1.2rem; }
.quiz-review-list li { margin: 0.35rem 0; text-transform: capitalize; }
.filter-bar .tier-btn:first-of-type { margin-left: 0.8rem; position: relative; }
.filter-bar .tier-btn:first-of-type::before {
  content: ""; position: absolute; left: -0.85rem; top: 15%; height: 70%;
  width: 1px; background: var(--contour);
}