/* ============================================================
   TFG* Tech for Good — Stylesheet
   1:1 translation of the Claude Design inline styles into a
   class-based design system. No visual value has been changed.
   ============================================================ */

/* ---------- Base (from design <helmet>) ---------- */
html, body { margin: 0; padding: 0; background: var(--color-bg); }
* { box-sizing: border-box; }
a { color: inherit; text-decoration: none; }
a:hover { opacity: .85; }
html { scroll-behavior: smooth; }

/* ---------- Section rhythm: one section per viewport ----------
   Sections snap to the top edge (under the sticky header) and fill
   the remaining viewport, with short content centered. Snap is firm
   (mandatory) on mobile, gentle (proximity) on desktop. Overlong
   sections still scroll freely between snap points. */
:root { --header-h: 63px; }
@media (max-width: 640px) { :root { --header-h: 98px; } }

html {
  scroll-snap-type: y proximity;
  scroll-padding-top: var(--header-h);
}
@media (max-width: 811px) {
  html { scroll-snap-type: y mandatory; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-snap-type: none; }
}

main > section {
  scroll-snap-align: start;
  min-height: calc(100vh - var(--header-h));
  min-height: calc(100svh - var(--header-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
}
/* Auto side margins disable flex stretch, so pin direct children to full
   width explicitly (containers still cap at their max-width and center). */
main > section > * { width: 100%; }
/* Marquee strips pin to the bottom edge of their section's viewport */
main > section > .marquee { margin-top: auto; }

@keyframes tfgMarquee { from { transform: translateX(0) } to { transform: translateX(-50%) } }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  min-height: 100vh;
}

/* ---------- Shared primitives ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}
.container--narrow { max-width: var(--container-narrow); }

.mono {
  font-family: var(--font-mono);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 44px);
}
.section-head h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(30px, 4.5vw, 52px);
  letter-spacing: -.015em;
}
.section-head .dot { color: var(--color-accent); }
.section-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--color-muted);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: var(--color-bg);
  border-bottom: var(--border-heavy);
}
.logo {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 18px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--color-muted);
}
.site-nav a:hover { color: var(--color-accent); }
/* Mobile header: logo + button on the first row, nav on its own
   full-width row that scrolls horizontally instead of wrapping. */
@media (max-width: 640px) {
  .site-header { flex-wrap: wrap; gap: 10px 16px; padding: 12px 16px; }
  .logo { order: 1; }
  .btn-header { order: 2; margin-left: auto; }
  .site-nav {
    order: 3;
    flex-basis: 100%;
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 22px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a { padding: 8px 0; white-space: nowrap; }
}
.btn-header {
  padding: 10px 18px;
  background: var(--color-ink);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  white-space: nowrap;
}

/* ---------- Hero ---------- */
.hero { border-bottom: var(--border-heavy); }
.hero-inner {
  padding-top: var(--pad-section-tall);
  padding-bottom: clamp(48px, 7vw, 96px);
  display: flex;
  flex-direction: column;
  gap: clamp(22px, 3vw, 34px);
}
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  padding: 7px 12px;
}
.badge--accent { color: var(--color-accent); border: 1px solid var(--color-accent); }
.badge--muted { color: var(--color-muted); border: 1px solid var(--border-ink-30); }
.hero-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(46px, 8.5vw, 104px);
  line-height: 1.0;
  letter-spacing: -.02em;
  text-wrap: pretty;
  max-width: 1000px;
}
.hero-title .accent-italic { font-style: italic; color: var(--color-accent); }
.hero-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  align-items: flex-end;
  justify-content: space-between;
}
.hero-lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.65;
  color: var(--color-body);
  max-width: 480px;
}
/* ---------- Work / case slider ---------- */
.work { border-bottom: var(--border-heavy); }
.work-inner {
  padding-top: var(--pad-section);
  padding-bottom: clamp(40px, 5vw, 64px);
}
.work .section-head { margin-bottom: clamp(24px, 4vw, 40px); }

.slider { border: var(--border-heavy); overflow: hidden; touch-action: pan-y; }
.slider-track {
  display: flex;
  transition: transform .55s cubic-bezier(.65, 0, .35, 1);
}
.case-card {
  flex: none;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  background: var(--color-bg);
}
.case-shot {
  flex: 1 1 320px;
  min-height: clamp(220px, 30vw, 380px);
  background: var(--hatch);
  border-bottom: var(--border-heavy);
  display: flex;
  align-items: flex-end;
  padding: 14px 16px;
}
.case-shot--sunrise {
  background: linear-gradient(135deg, #f5e7cf 0%, #eab27a 52%, #d15f12 100%);
}
.case-shot--sunrise .shot-label { color: #7a3a0d; }
.case-shot--dusk {
  background: linear-gradient(135deg, #6d675c 0%, #3a352c 55%, #141210 100%);
}
.case-shot--dusk .shot-label { color: var(--color-dark-muted); }
.shot-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .12em;
  color: var(--color-muted);
  text-transform: uppercase;
}
.case-body {
  flex: 1 1 340px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(22px, 3vw, 40px);
  border-bottom: var(--border-heavy);
}
.case-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}
.case-kind {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--color-accent);
  text-transform: uppercase;
}
.case-idx { font-family: var(--font-mono); font-size: 10px; color: var(--color-muted); }
.case-name {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -.01em;
}
.case-line {
  font-size: clamp(14px, 1.3vw, 16px);
  line-height: 1.65;
  color: var(--color-body);
  max-width: 460px;
}
.case-stat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--color-ink);
}
.case-link {
  margin-top: auto;
  padding-top: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--color-accent);
}

.slider-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--color-bg-alt);
}
/* Dots: visible square lives in ::before; the button itself is a 24x38px
   tap target (WCAG 2.5.8) matching the 38px arrows next to it. */
.slider-dots { display: flex; gap: 0; }
.slider-dot {
  width: 24px;
  height: 38px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: width .3s;
}
.slider-dot::before {
  content: "";
  width: 10px;
  height: 10px;
  border: 1.5px solid var(--color-ink);
  background: transparent;
  transition: all .3s;
}
.slider-dot.is-active { width: 40px; }
.slider-dot.is-active::before {
  width: 26px;
  background: var(--color-accent);
}
.slider-arrows { display: flex; gap: 10px; }
.slider-arrow {
  width: 38px;
  height: 38px;
  border: var(--border-heavy);
  background: var(--color-bg);
  font-size: 15px;
  cursor: pointer;
  font-family: inherit;
}
.slider-arrow--next {
  background: var(--color-ink);
  color: var(--color-bg);
}

/* ---------- Client marquee ---------- */
.marquee {
  display: flex;
  border-top: var(--border-heavy);
  overflow: hidden;
  background: var(--color-bg);
}
.marquee-track {
  display: flex;
  white-space: nowrap;
  animation: tfgMarquee 28s linear infinite;
}
.marquee-group {
  display: flex;
  align-items: center;
  gap: 26px;
  padding: 20px 13px;
}
.marquee-item {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--color-muted);
}
.marquee-sep { color: var(--color-muted); font-family: var(--font-mono); font-size: 11px; }
.marquee-logo {
  display: block;
  height: 19px;
  width: auto;
}
.marquee-logo--bcg { height: 30px; }

/* ---------- Manifesto ---------- */
.manifesto {
  background: var(--color-ink);
  color: var(--color-dark-text);
  border-bottom: var(--border-heavy);
}
.manifesto-inner {
  padding-top: var(--pad-section-tall);
  padding-bottom: var(--pad-section-tall);
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 3.5vw, 36px);
  text-align: center;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--color-accent);
}
.manifesto h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(32px, 5.5vw, 64px);
  line-height: 1.1;
  letter-spacing: -.015em;
  text-wrap: pretty;
}
.manifesto h2 .accent-italic { font-style: italic; color: var(--color-accent); }
.manifesto-lede {
  margin: 0 auto;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.75;
  color: var(--color-dark-muted);
  max-width: 620px;
}
.manifesto-close {
  margin: 0 auto;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(17px, 1.7vw, 22px);
  line-height: 1.6;
  color: var(--color-dark-serif);
  max-width: 560px;
}

/* ---------- Who we are ---------- */
.who { border-bottom: var(--border-heavy); }
.who-inner {
  padding-top: var(--pad-section);
  padding-bottom: var(--pad-section);
}
.who .section-head { margin-bottom: 14px; }
.who-lede {
  margin: 0 0 clamp(26px, 4vw, 44px);
  font-size: clamp(14px, 1.4vw, 17px);
  line-height: 1.65;
  color: var(--color-body);
  max-width: 560px;
}
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: clamp(16px, 2.5vw, 28px);
}
.person-card {
  display: flex;
  flex-direction: column;
  border: var(--border-heavy);
}
.person-shot {
  height: clamp(220px, 26vw, 320px);
  background: var(--hatch);
  border-bottom: var(--border-heavy);
  overflow: hidden;
}
.person-shot picture {
  display: block;
  width: 100%;
  height: 100%;
}
.person-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}
.person-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 2.5vw, 30px);
}
.person-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.person-name {
  font-family: var(--font-serif);
  font-size: clamp(26px, 2.6vw, 34px);
  letter-spacing: -.01em;
}
.person-role {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--color-accent);
  text-transform: uppercase;
}
.journey { display: flex; flex-direction: column; gap: 6px; }
.journey-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .16em;
  color: var(--color-muted);
}
.journey-line {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-body);
  padding-left: 14px;
  border-left: 2px solid var(--border-ink-25);
}
.journey--outward .journey-line { border-left-color: var(--border-accent-40); }
.person-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--color-accent-deep);
  padding-top: 12px;
  border-top: 1px solid var(--border-ink-20);
}
.person-linkedin {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--color-muted);
}

/* ---------- Offerings (compact: aims to fit one viewport on desktop) ---------- */
.offerings {
  border-bottom: var(--border-heavy);
  background: var(--color-bg-alt);
}
.offerings-inner {
  padding-top: clamp(36px, 4.5vw, 52px);
  padding-bottom: clamp(36px, 4.5vw, 52px);
}
.offerings .section-head { margin-bottom: clamp(18px, 2.5vw, 26px); }
.offers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  gap: clamp(12px, 1.6vw, 18px);
}
.offer-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(16px, 1.8vw, 22px);
  border: var(--border-heavy);
  background: var(--color-bg);
}
.offer-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
}
.offer-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--color-accent);
  text-transform: uppercase;
}
.offer-n { font-family: var(--font-mono); font-size: 11px; color: var(--color-muted); }
.offer-title {
  font-family: var(--font-serif);
  font-size: clamp(20px, 1.9vw, 25px);
  line-height: 1.12;
  letter-spacing: -.01em;
}
.offer-line {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--color-body);
}
.offer-includes {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-top: 4px;
}
.offer-include {
  font-size: 13px;
  line-height: 1.45;
  color: var(--color-body);
  display: flex;
  gap: 8px;
}
.offer-include .check { color: var(--color-accent); }
.offer-meta {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--border-ink-30);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: .1em;
  color: var(--color-muted);
  text-transform: uppercase;
}

/* ---------- Testimonials ---------- */
.testimonials {
  background: var(--color-ink);
  color: var(--color-dark-text);
  border-bottom: var(--border-heavy);
}
.testimonials-inner {
  padding-top: var(--pad-section);
  padding-bottom: var(--pad-section);
}
.testimonials .section-head h2 { font-weight: 300; }
.t-slider { overflow: hidden; touch-action: pan-y; }
#quote-track { align-items: flex-start; }
.quote-slide {
  flex: none;
  width: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(18px, 2.5vw, 26px);
  padding-left: 18px;
  border-left: 2px solid var(--color-accent);
}
.quote-text {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(19px, 2.2vw, 27px);
  line-height: 1.5;
  color: var(--color-dark-serif);
  text-wrap: pretty;
  max-width: 940px;
}
.quote-person {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0;
}
.quote-avatar {
  width: 52px;
  height: 52px;
  object-fit: cover;
  border: 1px solid var(--border-contact-35);
}
.quote-who { display: flex; flex-direction: column; gap: 4px; }
.quote-name {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--color-dark-text);
  text-transform: uppercase;
}
.quote-role {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--color-dark-muted-2);
  text-transform: uppercase;
}
.t-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: clamp(22px, 3vw, 32px);
}
.slider-dot--dark::before { border-color: var(--color-dark-muted-2); }
.slider-dot--dark.is-active::before { background: var(--color-accent); border-color: var(--color-accent); }
.slider-arrow--dark {
  width: 38px;
  height: 38px;
  border: 2px solid var(--color-dark-text);
  background: transparent;
  color: var(--color-dark-text);
  font-size: 15px;
  cursor: pointer;
  font-family: inherit;
}
.slider-arrow--dark-next {
  width: 38px;
  height: 38px;
  border: 2px solid var(--color-dark-text);
  background: var(--color-dark-text);
  color: var(--color-ink);
  font-size: 15px;
  cursor: pointer;
  font-family: inherit;
}

/* ---------- Process ---------- */
.process { border-bottom: var(--border-heavy); }
.process-inner {
  padding-top: var(--pad-section);
  padding-bottom: var(--pad-section);
}
/* Gap-as-border: the ink-colored grid background shows through 2px gaps,
   drawing the interior dividers (negative-margin borders don't survive grid). */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  background: var(--color-ink);
  border: var(--border-heavy);
  overflow: hidden;
}
.step-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.5vw, 30px);
  background: var(--color-bg);
  min-height: 190px;
}
@media (max-width: 1023px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 599px) {
  .steps-grid { grid-template-columns: 1fr; }
}
.step-n { font-family: var(--font-mono); font-size: 11px; color: var(--color-accent); }
.step-title {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2vw, 26px);
  letter-spacing: -.01em;
}
.step-line {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-body);
}

/* ---------- Contact ---------- */
.contact {
  background: var(--color-accent);
  color: var(--color-contact-text);
}
.contact-inner {
  padding-top: var(--pad-section-tall);
  padding-bottom: clamp(40px, 5vw, 56px);
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 30px);
  text-align: center;
  align-items: center;
}
.contact .eyebrow { color: var(--color-ink); }
.contact h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(36px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: -.015em;
}
.contact h2 .italic { font-style: italic; }
.contact-lede {
  margin: 0;
  font-size: clamp(14px, 1.4vw, 17px);
  line-height: 1.7;
  color: var(--color-ink);
  max-width: 520px;
}
.contact-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  width: 100%;
  max-width: 560px;
}
.contact-book {
  flex: 1 1 240px;
  text-align: center;
  padding: 18px;
  background: var(--color-ink);
  color: var(--color-bg);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
}
.contact-mail {
  flex: 1 1 240px;
  text-align: center;
  padding: 16px;
  border: 2px solid var(--color-ink);
  color: var(--color-ink);
  font-size: 13px;
  letter-spacing: .06em;
}
.contact-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  width: 100%;
  padding-top: 26px;
  margin-top: 14px;
  border-top: 1px solid var(--border-contact-35);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--color-ink);
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marquee-track { animation: none; }
  .slider-track { transition: none; }
  .slider-dot, .slider-dot::before { transition: none; }
}

/* ============================================================
   Courses page (/courses/) — same design language, new blocks
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  background: var(--color-ink);
  border: var(--border-heavy);
}
.stat-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2vw, 26px);
  background: var(--color-bg);
}
.stat-n {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(26px, 3vw, 44px);
  letter-spacing: -.015em;
}
.stat-n .star { color: var(--color-accent); }
.stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--color-muted);
  text-transform: uppercase;
}
@media (max-width: 799px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
.offer-link {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--color-accent);
}
.teacher-shot { height: clamp(240px, 30vw, 360px); }
.courses-hero-inner {
  padding-top: clamp(48px, 7vw, 96px);
  padding-bottom: clamp(40px, 6vw, 72px);
  display: flex;
  flex-direction: column;
  gap: clamp(22px, 3vw, 34px);
}
.courses-hero-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(42px, 7vw, 88px);
  line-height: 1.02;
  letter-spacing: -.02em;
  text-wrap: pretty;
  max-width: 980px;
}
.courses-hero-title .accent-italic { font-style: italic; color: var(--color-accent); }