/* ============================================================
   Publyz — styles.css
   Typography-first. No images. No gradients.
   Scroll-driven storytelling edition.
   ============================================================ */

/* ----------------------------------------------------------
   1. CSS Variables
   ---------------------------------------------------------- */
:root {
  --color-bg: #fffdf8;
  --color-text: #111111;
  --color-muted: #666666;
  --color-border: #e6e1d8;
  --color-button-bg: #111111;
  --color-button-text: #ffffff;
  --color-button-hover: #333333;
  --color-card-bg: #ffffff;

  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --max-width: 1180px;
  --padding-desktop: 32px;
  --padding-mobile: 20px;
  --header-h: 64px;
}

/* ----------------------------------------------------------
   2. Reset & Base
   ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-text); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--color-muted); }
ul { list-style: none; }
img { display: block; max-width: 100%; }

:focus-visible { outline: 2px solid var(--color-text); outline-offset: 3px; border-radius: 2px; }

/* ----------------------------------------------------------
   3. Typography
   ---------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: normal;
  line-height: 1.1;
  color: var(--color-text);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 42px;
  line-height: 1.1;
  font-weight: normal;
  margin-bottom: 16px;
}

.section-subtitle {
  font-family: var(--font-sans);
  font-size: 20px;
  line-height: 1.55;
  color: var(--color-muted);
  margin-bottom: 32px;
}

.section-right p {
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.75;
  color: var(--color-text);
  max-width: 680px;
  margin-bottom: 24px;
}

.section-right p:last-child { margin-bottom: 0; }

.section-label {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  display: block;
  margin-bottom: 20px;
}

/* ----------------------------------------------------------
   4. Layout
   ---------------------------------------------------------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-desktop);
}

/* ----------------------------------------------------------
   5. Buttons
   ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  border-radius: 3px;
  padding: 12px 22px;
  transition: background-color 0.15s ease;
  min-height: 44px;
  line-height: 1.4;
}

.btn--primary {
  background-color: var(--color-button-bg);
  color: var(--color-button-text);
}

.btn--primary:hover {
  background-color: var(--color-button-hover);
  color: var(--color-button-text);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.section-cta { margin-top: 4px; }

/* ----------------------------------------------------------
   6. Header
   ---------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo__img { display: block; height: 22px; width: auto; }

.site-nav { display: flex; align-items: center; }

.site-nav__list { display: flex; gap: 32px; }

.site-nav__link {
  font-family: var(--font-sans);
  font-size: 14px;
  text-decoration: none;
  color: var(--color-muted);
  letter-spacing: 0.01em;
  transition: color 0.1s ease;
}

.site-nav__link:hover,
.site-nav__link.is-active { color: var(--color-text); }

.site-header__actions { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }

.mobile-menu-btn {
  display: none;
  font-family: var(--font-sans);
  font-size: 14px;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  padding: 8px 14px;
  border-radius: 3px;
  min-height: 44px;
}

.mobile-menu-btn:hover { border-color: var(--color-muted); }

/* ----------------------------------------------------------
   7. Mobile Navigation
   ---------------------------------------------------------- */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background-color: var(--color-bg);
  z-index: 200;
  padding: 32px var(--padding-mobile);
  overflow-y: auto;
}

.mobile-nav.is-open { display: block; }

.mobile-nav__inner { display: flex; flex-direction: column; }

.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.mobile-nav__logo { display: block; height: 20px; width: auto; }

.mobile-nav__close {
  font-family: var(--font-sans);
  font-size: 14px;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  padding: 8px 14px;
  border-radius: 3px;
  min-height: 44px;
}

.mobile-nav__list { display: flex; flex-direction: column; gap: 8px; }

.mobile-nav__link {
  font-family: var(--font-serif);
  font-size: 32px;
  line-height: 1.2;
  text-decoration: none;
  color: var(--color-text);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  display: block;
}

.mobile-nav__link:hover { color: var(--color-muted); }

.mobile-nav__link--cta {
  font-family: var(--font-sans);
  font-size: 16px;
  margin-top: 24px;
  border-bottom: none;
  background-color: var(--color-button-bg);
  color: var(--color-button-text);
  padding: 14px 22px;
  border-radius: 3px;
  text-align: center;
}

.mobile-nav__link--cta:hover {
  background-color: var(--color-button-hover);
  color: var(--color-button-text);
}

/* ----------------------------------------------------------
   8. Reading progress bar
   ---------------------------------------------------------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background-color: var(--color-text);
  z-index: 999;
  pointer-events: none;
}

/* ----------------------------------------------------------
   9. Scroll Reveals
   ---------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ----------------------------------------------------------
   10. Full-screen Hero (Home page)
   ---------------------------------------------------------- */
.page-hero--fullscreen {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 0 100px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 76px;
  line-height: 1.04;
  font-weight: normal;
  max-width: 860px;
  margin-bottom: 28px;
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-size: 21px;
  line-height: 1.6;
  color: var(--color-muted);
  max-width: 520px;
  margin-bottom: 44px;
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.scroll-hint__line {
  width: 1px;
  height: 36px;
  background-color: var(--color-border);
}

/* Standard page hero (inner pages) */
.page-hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--color-border);
}

.page-hero__label {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 20px;
  display: block;
}

.page-hero__title {
  font-family: var(--font-serif);
  font-size: 60px;
  line-height: 1.05;
  font-weight: normal;
  max-width: 760px;
  margin-bottom: 24px;
}

.page-hero__subtitle {
  font-family: var(--font-sans);
  font-size: 21px;
  line-height: 1.55;
  color: var(--color-muted);
  max-width: 540px;
  margin-bottom: 36px;
}

/* ----------------------------------------------------------
   11. Sticky Story  (Read · Write · Share)
   ---------------------------------------------------------- */
.sticky-story {
  position: relative;
  height: 300vh;     /* 3 steps × 100vh scroll distance */
}

.sticky-story__pin {
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  border-top: 1px solid var(--color-border);
  overflow: hidden;
}

.sticky-story__inner {
  width: 100%;
  position: relative;
  min-height: 380px;   /* stable container for absolute children */
}

/* Each step is overlaid; only .is-active is shown.
   visibility has NO transition — it switches instantly.
   This means the outgoing step is immediately hidden
   (no paint) while the incoming step fades in cleanly.
   Result: zero simultaneous overlap between steps. */
.story-step {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  transform: translateY(-50%);
  opacity: 0;
  visibility: hidden;      /* no transition on this property */
  transition: opacity 0.45s ease;
  pointer-events: none;
  z-index: 0;
}

.story-step.is-active {
  opacity: 1;
  visibility: visible;     /* instantly visible, then opacity fades in */
  pointer-events: auto;
  z-index: 1;
}

.story-step.is-past {
  opacity: 0;
  visibility: hidden;      /* instantly hidden */
}

.story-step__layout {
  display: grid;
  grid-template-columns: 0.38fr 0.62fr;
  gap: 96px;
  align-items: center;
}

.story-step__counter {
  display: block;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.story-step__verb {
  font-family: var(--font-serif);
  font-size: 104px;
  line-height: 0.95;
  font-weight: normal;
  color: var(--color-text);
  will-change: transform;
}

.story-step__body {
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: 20px;
  max-width: 560px;
}

.story-step__body + .story-step__body { margin-top: -4px; }

.story-step__cta { margin-top: 36px; }

/* ----------------------------------------------------------
   12. Editorial Section
   ---------------------------------------------------------- */
.editorial-section {
  display: grid;
  grid-template-columns: 0.35fr 0.65fr;
  gap: 120px;
  padding: 96px 0;
  border-top: 1px solid var(--color-border);
}

.editorial-section:first-of-type { border-top: none; }

/* ----------------------------------------------------------
   13. Cards Section Wrapper
   ---------------------------------------------------------- */
.cards-section {
  padding: 96px 0;
  border-top: 1px solid var(--color-border);
  overflow: hidden;
}

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

.cards-section__heading {
  font-family: var(--font-serif);
  font-size: 42px;
  line-height: 1.1;
  font-weight: normal;
}

.cards-section__sub {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-muted);
  max-width: 300px;
  text-align: right;
}

/* ----------------------------------------------------------
   14. Card Carousel
   ---------------------------------------------------------- */
.card-carousel { position: relative; }

.card-carousel__track-wrapper {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;       /* Firefox */
}

.card-carousel__track-wrapper::-webkit-scrollbar { display: none; }

.card-carousel__track {
  display: flex;
  gap: 24px;
}

.carousel-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  justify-content: flex-end;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  background: none;
  cursor: pointer;
  font-size: 16px;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: border-color 0.15s ease, opacity 0.15s ease;
  flex-shrink: 0;
}

.carousel-btn:hover:not(:disabled) { border-color: var(--color-text); }
.carousel-btn:disabled { opacity: 0.3; cursor: default; pointer-events: none; }

/* ----------------------------------------------------------
   15. Case Story Card
   ---------------------------------------------------------- */
.case-card {
  flex: 0 0 340px;
  scroll-snap-align: start;
  border: 1px solid var(--color-border);
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  background-color: var(--color-card-bg);
  transition: border-color 0.2s ease;
}

.case-card:hover { border-color: var(--color-muted); }

.case-card__tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 20px;
  width: fit-content;
}

.case-card__title {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: normal;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 14px;
  flex: 1;
}

.case-card__objective {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.case-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  margin-top: auto;
  transition: gap 0.15s ease;
}

.case-card__cta:hover { gap: 10px; color: var(--color-text); }

/* ----------------------------------------------------------
   16. Member Card
   ---------------------------------------------------------- */
.member-card {
  flex: 0 0 264px;
  scroll-snap-align: start;
  border: 1px solid var(--color-border);
  padding: 28px;
  display: flex;
  flex-direction: column;
  background-color: var(--color-card-bg);
  transition: border-color 0.2s ease;
}

.member-card:hover { border-color: var(--color-muted); }

.member-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-text);
  color: var(--color-button-text);
  font-family: var(--font-serif);
  font-size: 17px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  flex-shrink: 0;
  user-select: none;
}

.member-card__name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: normal;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: 6px;
}

.member-card__role {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.45;
  margin-bottom: 2px;
}

.member-card__org {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.4;
  margin-bottom: 0;
  flex: 1;
}

.member-card__cta {
  margin-top: 24px;
  font-size: 13px;
  padding: 9px 18px;
  min-height: 38px;
}

/* ----------------------------------------------------------
   17. Closing CTA Section
   ---------------------------------------------------------- */
.closing-cta {
  padding: 120px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.closing-cta__title {
  font-family: var(--font-serif);
  font-size: 56px;
  line-height: 1.05;
  font-weight: normal;
  max-width: 620px;
  margin: 0 auto 24px;
}

.closing-cta__body {
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 480px;
  margin: 0 auto 40px;
}

/* ----------------------------------------------------------
   18. Legal Pages
   ---------------------------------------------------------- */
.legal-page { padding: 80px 0; }

.legal-page__header {
  margin-bottom: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.legal-page__title {
  font-family: var(--font-serif);
  font-size: 48px;
  line-height: 1.1;
  font-weight: normal;
  margin-bottom: 16px;
}

.legal-page__date { font-family: var(--font-sans); font-size: 15px; color: var(--color-muted); }

.legal-page__body { max-width: 720px; }

.legal-page__body h2 {
  font-family: var(--font-serif);
  font-size: 24px;
  line-height: 1.2;
  font-weight: normal;
  margin-top: 56px;
  margin-bottom: 16px;
}

.legal-page__body p {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: 18px;
}

.legal-page__body p:last-child { margin-bottom: 0; }
.legal-page__body a { color: var(--color-text); }

/* ----------------------------------------------------------
   19. Footer
   ---------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-footer__social { display: flex; gap: 20px; }

.site-footer__social-link {
  display: flex;
  align-items: center;
  opacity: 0.5;
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.site-footer__social-link:hover { opacity: 1; }
.site-footer__social-link img { display: block; }

.site-footer__copy {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-muted);
  text-align: center;
}

.site-footer__legal { display: flex; align-items: center; gap: 8px; }

.site-footer__legal-link {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-muted);
  text-decoration: none;
}

.site-footer__legal-link:hover { color: var(--color-text); }

.site-footer__sep { color: var(--color-border); font-size: 14px; }

/* ----------------------------------------------------------
   20. Responsive (≤768px)
   ---------------------------------------------------------- */
@media (max-width: 768px) {

  /* Header */
  .site-nav, .site-header__actions .btn--primary { display: none; }
  .mobile-menu-btn { display: flex; align-items: center; justify-content: center; }
  .site-header__inner { padding: 0 var(--padding-mobile); }

  .container { padding: 0 var(--padding-mobile); }

  /* Hero */
  .page-hero--fullscreen { padding: 64px 0 80px; }
  .hero-title { font-size: 40px; }
  .hero-subtitle { font-size: 18px; }
  .scroll-hint { display: none; }

  .page-hero { padding: 56px 0 48px; }
  .page-hero__title { font-size: 38px; }
  .page-hero__subtitle { font-size: 18px; }

  /* Sticky story: keep sticky on mobile, single-column layout */
  .sticky-story__inner { min-height: 280px; }

  /* Absolute steps ignore parent padding — restore it here */
  .story-step { padding: 0 var(--padding-mobile); }

  .story-step__layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .story-step__verb { font-size: 56px; }
  .story-step__body { font-size: 17px; max-width: 100%; }
  .story-step__cta { margin-top: 20px; }

  /* Editorial sections */
  .editorial-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 64px 0;
  }

  .section-title { font-size: 30px; }
  .section-subtitle { font-size: 18px; }
  .section-right p { font-size: 17px; }

  /* Cards */
  .cards-section { padding: 64px 0; }

  .cards-section__header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 32px;
  }

  .cards-section__sub { text-align: left; max-width: 100%; }
  .cards-section__heading { font-size: 30px; }

  .case-card { flex: 0 0 calc(100vw - 40px); }
  .member-card { flex: 0 0 calc(100vw - 40px); }

  /* Closing CTA */
  .closing-cta { padding: 80px 0; }
  .closing-cta__title { font-size: 36px; }
  .closing-cta__body { font-size: 17px; }

  /* Legal */
  .legal-page { padding: 56px 0; }
  .legal-page__title { font-size: 36px; }

  /* Footer */
  .site-footer__inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 var(--padding-mobile);
    gap: 20px;
  }
}