/* ===================================================
   The Divergent Analyst — global stylesheet
   Palette concept: paper/ink (book, field notes) crossed
   with two accents that carry the brand's core duality —
   amber for the human/lived material (attention, reward),
   teal for the systems/method material (data, structure).
   =================================================== */

:root {
  --ink: #15171D;
  --ink-soft: #21242C;
  --graphite: #454B58;
  --paper: #F6F3EC;
  --paper-dim: #EDE7D8;
  --paper-card: #FFFEFB;
  --line: #DDD5C0;
  --line-dark: rgba(246, 243, 236, 0.14);

  --teal: #1E6E68;
  --teal-dark: #123F3C;
  --teal-tint: #E4EFEC;

  --amber: #E3A036;
  --amber-dark: #B87A1B;
  --amber-tint: #FBEED8;

  --text: #1B1B1D;
  --text-soft: rgba(27, 27, 29, 0.68);

  --font-head: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --max-width: 1140px;
  --radius: 4px;
}

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

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.18;
  margin: 0 0 0.5em;
  color: var(--ink);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.3rem, 4.6vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; }

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal-dark);
  font-weight: 500;
  margin-bottom: 0.9em;
}
.eyebrow::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--amber-dark);
  display: inline-block;
}
.eyebrow.on-dark { color: var(--amber); }
.eyebrow.on-dark::before { background: var(--amber); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.85em 1.7em;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  border: 1.5px solid transparent;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--teal-dark); transform: translateY(-1px); }

.btn-secondary {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}
.btn-secondary:hover { background: var(--ink); color: var(--paper); }

.btn-light {
  background: var(--amber);
  color: var(--ink);
}
.btn-light:hover { background: var(--amber-dark); color: #fff; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 243, 236, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand span { color: var(--teal); font-style: italic; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--teal-dark);
  border-color: var(--amber);
}

.nav-cta { margin-left: 8px; }

/* Beat the .nav-links a text-colour rule so the pill button keeps its own light text */
.nav-links li.nav-cta a.btn-primary,
.nav-links li.nav-cta a.btn-primary:hover,
.nav-links li.nav-cta a.btn-primary[aria-current="page"] {
  color: var(--paper);
  border-color: transparent;
}
.nav-links li.nav-cta a.btn-primary:hover {
  background: var(--teal-dark);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--ink);
  display: block;
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }

  .nav-links.open { max-height: 420px; }
  .nav-links li { width: 100%; }

  .nav-links a {
    display: block;
    width: 100%;
    padding: 14px 24px;
    border-bottom: 1px solid var(--line);
    border-left: 2px solid transparent;
  }

  .nav-links a:hover,
  .nav-links a[aria-current="page"] {
    border-color: transparent;
    border-left-color: var(--amber);
    background: var(--paper-dim);
  }

  .nav-cta { margin: 12px 24px 16px; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 100px 0 76px;
  background:
    radial-gradient(ellipse at top right, var(--teal-tint) 0%, transparent 55%),
    var(--paper);
}

.hero.hero-dark {
  background: var(--ink);
  color: var(--paper);
}
.hero.hero-dark h1,
.hero.hero-dark .eyebrow { color: var(--paper); }
.hero.hero-dark p { color: rgba(246, 243, 236, 0.78); }

.hero-inner { max-width: 740px; }

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 1.6em;
}

.lede {
  font-size: 1.15rem;
  color: var(--text-soft);
}

/* Bigger, more deliberate treatment for the site's single main hero (Home),
   so it reads as a statement of intent rather than an article-teaser card. */
.hero-lg { padding: 148px 0 100px; }
.hero-lg .hero-inner { max-width: 860px; }
.hero-lg h1 {
  font-size: clamp(2.7rem, 5.8vw, 4.6rem);
  line-height: 1.06;
  max-width: 15ch;
}
.hero-dek {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(1.05rem, 2.1vw, 1.35rem);
  color: rgba(246, 243, 236, 0.82);
  max-width: 34ch;
  margin: 0.5em 0 1.2em;
}
.hero-lg .lede { margin-top: 0.4em; }

@media (max-width: 640px) {
  .hero-lg { padding: 108px 0 72px; }
}

/* ---------- Sections ---------- */
.section { padding: 76px 0; }
.section-alt { background: var(--paper-card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-dark { background: var(--ink); color: var(--paper); }
.section-dark h2, .section-dark h3 { color: var(--paper); }
.section-dark p { color: rgba(246, 243, 236, 0.78); }

.section-head { max-width: 660px; margin: 0 0 40px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; gap: 32px; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}

.card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

/* ---------- Method stages (Recognise / Understand / Design / Benefit) ---------- */
.stage-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  padding: 26px 24px;
}
.stage-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--amber-dark);
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  display: block;
}
.stage-card h3 { margin-bottom: 0.4em; }
.stage-q {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 0.88rem;
  color: var(--text-soft);
  font-style: italic;
}

/* ---------- Protected line / pull quote ---------- */
.protected-quote {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 40px clamp(24px, 5vw, 56px);
  position: relative;
}
.protected-quote .quote-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  display: block;
  margin-bottom: 18px;
}
.protected-quote p {
  font-family: var(--font-head);
  font-style: italic;
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  line-height: 1.42;
  color: var(--paper);
  margin: 0;
}

.pull-quote {
  font-family: var(--font-head);
  font-style: italic;
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  color: var(--ink);
  border-left: 3px solid var(--amber);
  padding-left: 24px;
  margin: 0;
}
.pull-quote cite {
  display: block;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-soft);
  margin-top: 14px;
}

/* ---------- Tables ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper-card);
  border: 1px solid var(--line);
}
.data-table th, .data-table td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
  vertical-align: top;
}
.data-table th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-dark);
  background: var(--teal-tint);
}
.data-table tr:last-child td { border-bottom: none; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); }
.table-scroll .data-table { border: none; min-width: 640px; }

/* ---------- Tags ---------- */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--teal-tint);
  color: var(--teal-dark);
  margin: 0 6px 6px 0;
}
.tag.amber { background: var(--amber-tint); color: var(--amber-dark); }

/* ---------- Additional Resources ---------- */
.resource-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 4px 0 40px;
}
.resource-jump a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--teal-tint);
  color: var(--teal-dark);
}
.resource-jump a:hover { background: var(--teal); color: var(--paper); }

.resource-group {
  margin-bottom: 40px;
  scroll-margin-top: 90px;
}
.resource-group:last-child { margin-bottom: 0; }
.resource-group h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.resource-row {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.resource-row:last-child { border-bottom: none; }
.resource-title {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}
a.resource-title:hover { color: var(--teal-dark); text-decoration-color: var(--teal); }
.resource-row p { margin: 4px 0 0; font-size: 0.92rem; color: var(--text-soft); }

/* ---------- Insights / chapter list ---------- */
.insight-card {
  display: block;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.insight-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal-dark);
  font-weight: 500;
  margin-bottom: 0.5em;
}
.insight-card h3 { margin-bottom: 0.3em; }

.chapter-row {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.chapter-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--amber-dark);
  min-width: 32px;
  padding-top: 2px;
}
.chapter-row h3 { margin-bottom: 4px; }
.chapter-row p { margin: 0; color: var(--text-soft); font-size: 0.94rem; }

/* ---------- Form ---------- */
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
.form-field input,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  background: #fff;
}
.form-field textarea { min-height: 140px; resize: vertical; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(246, 243, 236, 0.82);
  padding: 56px 0 28px;
  margin-top: 40px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-brand {
  font-family: var(--font-head);
  color: var(--paper);
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.footer-brand span { color: var(--amber); font-style: italic; }
.footer-links {
  display: flex;
  gap: 22px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}
.footer-links a { color: rgba(246, 243, 236, 0.78); font-size: 0.88rem; }
.footer-links a:hover { color: var(--amber); }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding-top: 20px;
  font-size: 0.8rem;
  color: rgba(246, 243, 236, 0.5);
}