/* ==========================================================================
   Elucid Science — shared stylesheet
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* colour */
  --bg:            #fbfaf7;
  --bg-raised:     #f2f0ea;
  --bg-raised-2:   #ebe8e0;
  --line:          rgba(20, 32, 47, 0.10);
  --line-strong:   rgba(20, 32, 47, 0.20);
  --ink:           #14202f;
  --ink-soft:      #46515f;
  --ink-mute:      #667180;
  --accent:        #2b5f9e;
  --accent-soft:   rgba(43, 95, 158, 0.08);
  --accent-line:   rgba(43, 95, 158, 0.35);

  /* type */
  --serif: 'Source Serif 4', Georgia, serif;
  --sans:  'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono:  'IBM Plex Mono', 'SFMono-Regular', Menlo, monospace;

  /* rhythm */
  --content-w: 1120px;
  --narrow-w: 760px;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 32px;
}

.narrow { max-width: var(--narrow-w); }

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 250, 247, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  font-family: var(--serif);
  color: var(--ink);
  display: flex;
  flex-direction: column;
  line-height: 1;
  gap: 5px;
}

.logo .brand-mark {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 19px;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.logo .brand-mark .dot { color: var(--accent); font-size: 14px; }

.logo .brand-sub {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.28em;
  color: var(--ink-mute);
  padding-left: 22px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 14.5px;
  color: var(--ink-soft);
  transition: color 0.15s ease;
  position: relative;
}

.nav-links a:hover { color: var(--ink); }

.nav-links a.is-active { color: var(--ink); }

.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -22px;
  height: 2px;
  background: var(--accent);
}

.nav-cta {
  border: 1px solid var(--line-strong);
  padding: 9px 18px;
  border-radius: 3px;
  font-size: 14px;
  color: var(--ink) !important;
  transition: border-color 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.nav-cta:hover { border-color: var(--accent-line); background: var(--accent-soft); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--ink);
}
.nav-toggle svg { width: 22px; height: 22px; }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }

  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg-raised);
    border-bottom: 1px solid var(--line);
    padding: 8px 32px 20px;
  }
  .nav-links.is-open a {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.is-open a.is-active::after { display: none; }
  .nav-links.is-open .nav-cta {
    margin-top: 12px;
    text-align: center;
    border: 1px solid var(--line-strong);
  }
}

/* ==========================================================================
   Eyebrow / kicker
   ========================================================================== */

.kicker {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 18px;
}

/* ==========================================================================
   Page header (non-home hero)
   ========================================================================== */

.page-header {
  padding: 64px 0 52px;
  border-bottom: 1px solid var(--line);
}

.page-header h1 {
  font-size: clamp(32px, 4.4vw, 46px);
  line-height: 1.15;
  max-width: 780px;
}

.page-header .lede {
  margin-top: 22px;
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 620px;
}

/* ==========================================================================
   Home hero
   ========================================================================== */

.hero {
  position: relative;
  padding: 76px 0 80px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 54px);
  line-height: 1.14;
  color: var(--ink);
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero .lede {
  margin-top: 24px;
  font-size: 18.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.hero-figure {
  position: relative;
}

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-figure { order: -1; max-width: 320px; opacity: 0.8; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 500;
  padding: 13px 24px;
  border-radius: 3px;
  transition: all 0.15s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}
.btn-primary:hover { background: #1f4a80; }

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--accent-line); background: var(--accent-soft); }

/* ==========================================================================
   Sections
   ========================================================================== */

section { padding: 72px 0; }
section.tight { padding: 52px 0; }
section + section { border-top: 1px solid var(--line); }
.alt-bg { background: var(--bg-raised); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: clamp(26px, 3vw, 34px);
  max-width: 560px;
  line-height: 1.22;
}

.section-head .section-note {
  font-size: 15.5px;
  color: var(--ink-mute);
  max-width: 340px;
  padding-bottom: 4px;
}

/* ==========================================================================
   Grids & cards
   ========================================================================== */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }

@media (max-width: 880px) {
  .grid-2, .grid-3, .grid-4, .grid-2col { grid-template-columns: 1fr; }
}



.card {
  border-top: 1px solid var(--line-strong);
  padding: 26px 0 0;
}

.card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  line-height: 1.35;
}

.card p {
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.plain-item {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.plain-item:last-child { border-bottom: 1px solid var(--line); }

.plain-item h3 {
  font-size: 19px;
  margin-bottom: 10px;
}
.plain-item p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 640px;
}

/* stat row */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 8px;
}
.stat {
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}
.stat .num {
  font-family: var(--mono);
  font-size: 26px;
  color: var(--ink);
}
.stat .label {
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--ink-mute);
  line-height: 1.5;
}
@media (max-width: 880px) {
  .stat-row { grid-template-columns: 1fr 1fr; }
}

/* ==========================================================================
   Numbered list (used only where content is genuinely sequential)
   ========================================================================== */

.steps { counter-reset: step; }
.step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 36px 0;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step .step-num {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 15px;
  padding-top: 4px;
}
.step h3 { font-size: 20px; margin-bottom: 10px; }
.step p { color: var(--ink-soft); font-size: 15.5px; max-width: 620px; }

@media (max-width: 640px) {
  .step { grid-template-columns: 1fr; gap: 8px; }
}

/* ==========================================================================
   Services (detailed)
   ========================================================================== */

.service-block {
  padding: 64px 0;
}
.service-block + .service-block { border-top: 1px solid var(--line); }

.service-tag {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.service-block h2 {
  font-size: clamp(24px, 3vw, 30px);
  max-width: 640px;
}

.service-lead {
  margin-top: 18px;
  font-size: 16.5px;
  color: var(--ink-soft);
  max-width: 640px;
  line-height: 1.7;
}

.service-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin-top: 40px;
}

@media (max-width: 880px) {
  .service-cols { grid-template-columns: 1fr; }
}

.service-cols h4 {
  font-family: var(--sans);
  font-size: 13px;
  text-transform: none;
  color: var(--ink-mute);
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.service-cols ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.service-cols li {
  font-size: 14.5px;
  color: var(--ink-soft);
  padding: 9px 0;
  border-top: 1px solid var(--line);
  line-height: 1.5;
}
.service-cols p {
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* ==========================================================================
   Expertise page
   ========================================================================== */

.expertise-item {
  padding: 36px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
}
.expertise-item:last-child { border-bottom: 1px solid var(--line); }

.expertise-item h3 {
  font-size: 20px;
  line-height: 1.3;
}

.expertise-item .tags {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.expertise-item .tags span {
  font-size: 12.5px;
  color: var(--ink-mute);
  border: 1px solid var(--line);
  padding: 5px 10px;
  border-radius: 20px;
}

.expertise-item p { color: var(--ink-soft); font-size: 15.5px; line-height: 1.7; }

@media (max-width: 720px) {
  .expertise-item { grid-template-columns: 1fr; gap: 14px; }
}

.note-box {
  margin-top: 48px;
  padding: 26px 28px;
  border-left: 2px solid var(--accent-line);
  background: var(--accent-soft);
  border-radius: 0 4px 4px 0;
}
.note-box p { color: var(--ink-soft); font-size: 15px; line-height: 1.65; }

/* ==========================================================================
   Insights
   ========================================================================== */

.insight-card {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 30px;
  background: var(--bg-raised);
  display: flex;
  flex-direction: column;
  min-height: 210px;
}
.insight-card .topic-tag {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--accent);
  letter-spacing: 0.03em;
  margin-bottom: 16px;
}
.insight-card h3 {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 12px;
}
.insight-card p {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.6;
  margin-top: auto;
  padding-top: 14px;
}

/* ==========================================================================
   Work-with-me scenarios
   ========================================================================== */

.scenario {
  padding: 26px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr;
}
.scenario:last-child { border-bottom: 1px solid var(--line); }
.scenario blockquote {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 19px;
  color: var(--ink);
  font-style: italic;
  line-height: 1.5;
}
.scenario p { font-size: 14.5px; color: var(--ink-mute); }

/* ==========================================================================
   CTA band
   ========================================================================== */

.cta-band {
  border-top: 1px solid var(--line);
  padding: 72px 0;
  text-align: left;
}
.cta-band h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  max-width: 640px;
}
.cta-band .lede {
  margin-top: 18px;
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 520px;
}
.cta-band .hero-actions { margin-top: 32px; }

/* ==========================================================================
   Contact
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
}
@media (max-width: 880px) {
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
}

.contact-detail {
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.contact-detail:last-child { border-bottom: 1px solid var(--line); }
.contact-detail .label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.contact-detail .value { font-size: 16px; color: var(--ink); }
.contact-detail .value a:hover { color: var(--accent); }

.form-field {
  margin-bottom: 22px;
}
.form-field label {
  display: block;
  font-size: 13.5px;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 13px 14px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  transition: border-color 0.15s ease;
}
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--accent);
  outline: none;
}
.form-field textarea { resize: vertical; min-height: 130px; }

.form-note {
  font-size: 13px;
  color: var(--ink-mute);
  margin-top: 14px;
}

.form-status {
  margin-top: 16px;
  font-size: 14.5px;
  color: var(--accent);
  display: none;
}
.form-status.is-visible { display: block; }

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 40px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 48px;
}

@media (max-width: 720px) {
  .footer-top { grid-template-columns: 1fr 1fr; row-gap: 36px; }
}

.footer-top .logo { margin-bottom: 14px; }
.footer-blurb {
  font-size: 14.5px;
  color: var(--ink-mute);
  max-width: 260px;
  line-height: 1.6;
}

.footer-col h5 {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  font-weight: 400;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 11px; font-size: 14.5px; color: var(--ink-soft); }
.footer-col a { font-size: 14.5px; color: var(--ink-soft); }
.footer-col a:hover { color: var(--ink); }

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-mute);
}

/* ==========================================================================
   Utility
   ========================================================================== */

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.center { text-align: center; }

@media (max-width: 880px) {
  section { padding: 64px 0; }
  .grid-3, .grid-4 { gap: 24px; }
}