/* ============================================================
   Strategy memo for Precision Builders Ltd
   Single-page document with sticky side navigation
   ============================================================ */

:root {
  --paper:        #FAF7F0;
  --paper-deep:   #F2EDDF;
  --paper-card:   #FFFFFF;
  --rule:         #D8CDB8;
  --rule-soft:    #E6DDC8;
  --ink:          #1F1B16;
  --ink-soft:     #3A332A;
  --muted:        #7A7065;
  --stone-dark:   #5C5040;
  --accent:       #8E2E12;
  --accent-soft:  #A84A2A;

  --serif:    'Fraunces', 'Cormorant Garamond', 'Times New Roman', serif;
  --sans:     'Newsreader', Georgia, 'Times New Roman', serif;

  --sidebar-w: 240px;
  --doc-width: 680px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: "kern", "liga";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ============================================================
   Layout: sticky side-nav + main column
   ============================================================ */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  max-width: 1280px;
  margin: 0 auto;
  gap: 0;
}

/* ============== Sticky side navigation ============== */
.side-nav {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 3rem 1.8rem 2rem;
  border-right: 1px solid var(--rule);
  background: var(--paper);
  overflow-y: auto;
  font-family: var(--sans);
}
.side-nav .doc-meta {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.4rem;
}
.side-nav .doc-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin-bottom: 0.6rem;
}
.side-nav .doc-author {
  font-size: 0.8rem;
  font-style: italic;
  color: var(--stone-dark);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}

.nav-label {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 0.7rem;
}

.side-nav ol {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  counter-reset: section-counter;
}
.side-nav ol li {
  counter-increment: section-counter;
  margin-bottom: 0.15rem;
}
.side-nav ol li a {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 0.4rem;
  padding: 0.45rem 0;
  font-size: 0.86rem;
  color: var(--ink-soft);
  text-decoration: none;
  border: none;
  line-height: 1.3;
  transition: color 0.2s ease;
}
.side-nav ol li a::before {
  content: counter(section-counter, decimal-leading-zero);
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 400;
}
.side-nav ol li a:hover,
.side-nav ol li a.active {
  color: var(--accent);
}
.side-nav ol li a:hover::before,
.side-nav ol li a.active::before {
  color: var(--accent);
}

.side-nav .nav-cta {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.side-nav .nav-cta a {
  display: block;
  font-size: 0.82rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px dotted var(--stone-dark);
  padding: 0.3rem 0;
  margin-bottom: 0.3rem;
  font-style: italic;
}
.side-nav .nav-cta a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ============== Main column ============== */
main {
  padding: 4rem 4rem 5rem;
  min-width: 0;
}

/* ============== Title block ============== */
.title-block {
  max-width: var(--doc-width);
  margin: 0 0 4rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--ink);
}
.title-block .doc-eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.2rem;
}
.title-block h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--ink);
  margin-bottom: 1.2rem;
}
.title-block .subtitle {
  font-family: var(--sans);
  font-style: italic;
  font-size: 1.02rem;
  color: var(--stone-dark);
  line-height: 1.5;
}

/* ============================================================
   Sections — alternating backgrounds for visual rhythm
   ============================================================ */
section {
  padding: 3.5rem 0;
  max-width: var(--doc-width);
  scroll-margin-top: 2rem;
}
section + section { border-top: 1px solid var(--rule-soft); }

/* For wide sections (personas) push wider */
section.wide { max-width: 100%; }

.section-num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 0.6rem;
}

h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 1.4rem;
  max-width: 620px;
}

h3 {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 1.4rem 0 0.5rem;
}

p {
  margin-bottom: 1.1rem;
  color: var(--ink-soft);
  max-width: 620px;
}
p.lead {
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.5;
  font-weight: 300;
  color: var(--ink);
  margin-bottom: 1.4rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 0.2s ease;
}
a:hover { color: var(--ink); }
em { font-style: italic; color: var(--ink); }
strong { font-weight: 600; color: var(--ink); }

/* ============== Framing / disclaimer box ============== */
.framing-box {
  background: var(--paper-deep);
  border-left: 3px solid var(--accent);
  padding: 1.3rem 1.6rem;
  margin: 1.8rem 0 0;
  font-family: var(--sans);
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 620px;
}
.framing-box p { margin-bottom: 0.6rem; }
.framing-box p:last-child { margin-bottom: 0; }
.framing-box strong { color: var(--accent); font-style: italic; font-weight: 500; }

/* ============== Standout quote ============== */
blockquote.standout {
  border-left: 2px solid var(--accent);
  padding: 0.5rem 0 0.5rem 1.6rem;
  margin: 2rem 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 300;
  line-height: 1.4;
  color: var(--ink);
  font-style: italic;
  max-width: 600px;
}

/* ============================================================
   Personas — 4-up on wide, 2x2 on tablet, 1 on mobile
   ============================================================ */
.personas-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
  margin: 2rem 0 1rem;
  max-width: 100%;
}

@media (max-width: 1180px) {
  .personas-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .personas-grid { grid-template-columns: 1fr; }
}

.persona-card {
  background: var(--paper-card);
  border: 1px solid var(--rule);
  padding: 1.3rem 1.2rem 1.2rem;
  display: flex;
  flex-direction: column;
}
.persona-card .label {
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}
.persona-card h3 {
  font-size: 1.18rem;
  margin: 0 0 0.2rem;
  font-weight: 500;
}
.persona-card .persona-tag {
  font-family: var(--sans);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--stone-dark);
  display: block;
  margin-bottom: 0.7rem;
  line-height: 1.4;
}
.persona-card p {
  font-size: 0.88rem;
  margin: 0;
  line-height: 1.5;
  max-width: 100%;
}
.persona-card dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem 0;
  font-size: 0.78rem;
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px dashed var(--rule);
}
.persona-card dt {
  font-family: var(--sans);
  font-style: italic;
  font-weight: 500;
  color: var(--stone-dark);
  margin-bottom: 0.15rem;
}
.persona-card dd {
  color: var(--ink-soft);
  line-height: 1.45;
  margin-bottom: 0.2rem;
}

/* ============== Plan steps ============== */
.plan-steps {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  counter-reset: plan-step;
  max-width: 620px;
}
.plan-steps > li {
  counter-increment: plan-step;
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1rem;
  padding: 1.3rem 0;
  border-top: 1px solid var(--rule);
}
.plan-steps > li:last-child { border-bottom: 1px solid var(--rule); }
.plan-steps > li::before {
  content: counter(plan-step, decimal-leading-zero);
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
}
.plan-steps h3 { margin: 0 0 0.2rem; font-size: 1.1rem; font-weight: 500; }
.plan-steps .timing {
  font-family: var(--sans);
  font-style: italic;
  font-size: 0.8rem;
  color: var(--stone-dark);
  margin-bottom: 0.4rem;
  display: block;
}
.plan-steps p { font-size: 0.94rem; margin-bottom: 0; line-height: 1.55; }

/* ============== Gap list ============== */
.gap-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  max-width: 620px;
}
.gap-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 0.6rem;
  align-items: baseline;
}
.gap-list li::before {
  content: attr(data-num);
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--accent);
}
.gap-list h3 { margin: 0 0 0.25rem; font-size: 1.05rem; font-weight: 500; }
.gap-list p { margin-bottom: 0; font-size: 0.94rem; line-height: 1.55; }

/* ============== About-pillars (Why me section) ============== */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
  max-width: 100%;
}
@media (max-width: 900px) { .pillars { grid-template-columns: 1fr; } }

.pillars .pillar {
  padding: 1.2rem 1.2rem 1.3rem;
  background: var(--paper-deep);
  border-top: 2px solid var(--accent);
}
.pillars .pillar h3 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
  font-weight: 500;
  font-family: var(--serif);
}
.pillars .pillar p {
  font-size: 0.88rem;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.55;
}

/* ============== Honest gaps inline list ============== */
.gaps-inline {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  max-width: 620px;
}
.gaps-inline li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.96rem;
}
.gaps-inline li:last-child { border-bottom: none; }
.gaps-inline li strong { display: block; margin-bottom: 0.3rem; font-family: var(--serif); font-weight: 500; }

/* ============== Practical block ============== */
.practical {
  background: var(--paper-deep);
  padding: 1.5rem 1.6rem;
  margin: 1.5rem 0;
  max-width: 620px;
  border: 1px solid var(--rule);
}
.practical ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.practical li {
  padding: 0.4rem 0;
  font-size: 0.92rem;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1rem;
  border-bottom: 1px dotted var(--rule);
}
.practical li:last-child { border-bottom: none; }
.practical li strong {
  font-family: var(--sans);
  font-style: italic;
  font-weight: 500;
  color: var(--stone-dark);
}

/* ============== Footer ============== */
footer.doc-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  max-width: var(--doc-width);
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--muted);
}
footer.doc-footer p { margin: 0; color: var(--muted); max-width: 100%; }
footer.doc-footer a { color: var(--muted); border-bottom: 1px dotted var(--muted); }
footer.doc-footer a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ============================================================
   Mobile: collapse layout
   ============================================================ */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .side-nav {
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--rule);
    padding: 2rem 1.5rem 1.5rem;
    overflow: visible;
  }
  .side-nav .doc-author { margin-bottom: 1rem; padding-bottom: 1rem; }
  .side-nav ol { margin-bottom: 1rem; }
  .side-nav ol li a { font-size: 0.9rem; padding: 0.35rem 0; }
  .side-nav .nav-cta { padding-top: 1rem; }

  main { padding: 2.5rem 1.5rem 3rem; }
  .title-block { margin-bottom: 2.5rem; }
  section { padding: 2.5rem 0; }
  .plan-steps > li { grid-template-columns: 40px 1fr; padding: 1rem 0; }
  .plan-steps > li::before { font-size: 1.3rem; }
  .practical li { grid-template-columns: 1fr; gap: 0.2rem; }
}

@media print {
  body { background: white; }
  .side-nav { display: none; }
  .layout { display: block; }
  main { padding: 0; }
  section { break-inside: avoid-page; }
  .persona-card { break-inside: avoid; }
}