/* === DESIGN SYSTEM TOKENS === */
:root {
  --color-black:      #111111;
  --color-white:      #FFFFFF;
  --color-off-white:  #FAFAFA;
  --color-text:       #E8E8E8;
  --color-gray-dark:  #767676;
  --color-gray-mid:   #949494;
  --color-divider:    #333333;
}
/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* === BASE === */
body {
  background: var(--color-black);
  color: var(--color-white);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1rem;
  line-height: 1.75;
}

/* === SKIP LINK — WCAG 2.4.1 === */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 8px 16px;
  background: var(--color-white);
  color: var(--color-black);
  font-size: 0.875rem;
  z-index: 100;
}

/* === HEADER === */
header {
  background: var(--color-black);
  min-height: 100vh;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  max-width: 1000px;   /* was at 960px */
  margin: 0 auto;
}

/* === TOP BAR === */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
}

.logo-link { display: inline-block; border-radius: 50%; }
.logo-link:focus { outline: 2px solid var(--color-white); outline-offset: 3px; }
.logo { width: 160px; height: 160px; border-radius: 50%; display: block; } /* was 56px for height & width */

nav { display: flex; gap: 2rem; }
nav span {
  color: var(--color-gray-dark);
  font-size: 1rem; /* was 0.875rem */
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* === CENTER COMPOSITION === */
.center-composition {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 675px; /* was 640px */
  margin: 0 auto;
  width: 100%;
  position: relative;
}

h1 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 2.75rem;
  color: var(--color-white);
  text-align: center;
  line-height: 1.15;
  margin-bottom: 2rem;
}

/* === BLOCKQUOTE === */
.blockquote-wrap { position: relative; margin-bottom: 1.5rem; }

blockquote {
  border-left: 2px solid var(--color-gray-dark);
  padding-left: 1.25rem;
  font-style: italic;
  color: var(--color-text);
  font-size: 1.25rem;    /* was 1rem, then 1.125rem, then 1.35rem */
  line-height: 1.85;      /* was 1.75 */
  border-radius: 0;
}

cite {
  display: block;
  margin-top: 0.75rem;
  font-style: normal;
  font-size: 0.8rem;
  color: var(--color-gray-mid);
}

/* === SKETCH IMAGES === */
.sketch-prd {
  position: absolute;
  right: -105px; /* was -120px, then -180px */
  top: -65px; /* was -18px */
  width: 200px;  /* was 100px, then 160px */
  height: calc(100% + 75px); /* was calc(100% + 36px) then auto */
  object-fit: unset; /* was cover */
  object-position: unset; /* was top */ 
  border-radius: 2px;
}

.sketch-roadmap {
  position: absolute;
  left: -100px;   /* was -125px, then -180px */
  top: calc(100% + 30px);
  width: 200px;    /* was 80px, then 100px */
  height: calc(100% + 75px);
  object-fit: unset;
  object-position: top;
  border-radius: 2px;
}

/* === COMPOSITIONAL OFFSETS === */
.blockquote-left {
  margin-right: 20%;
}

.body-right {
  margin-left: 20%;
}

/* === BODY COPY === */
.body-copy {
  color: var(--color-text);
  font-size: 1.15rem;  /* was 0.95rem, then 1.125rem, then 1.2rem */
  line-height: 1.85;    /* was 1.75 */
  margin-bottom: 1.5rem;
}

.closing-a {
  color: var(--color-text);
  font-size: 1.15rem; /* was 0.95rem, then 1.125rem, then 1.2rem */
  line-height: 1.85;
  margin-bottom: 0;
}
.closing-b {
  color: var(--color-text);
  font-size: 1.15rem;   /* was 0.95rem, then 1.125rem, then 1.2rem */
  line-height: 1.85;    /* was 1.75 */
}

/* === SCROLL CUE === */
.scroll-cue {
  display: flex;
  justify-content: center;
  margin-top: 2.5rem;
}

.chevron {
  width: 24px;
  height: 24px;
  border-right: 2px solid #555555;
  border-bottom: 2px solid #555555;
  transform: rotate(45deg);
  animation: bounce 1.6s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0);  opacity: 0.4; }
  50%       { transform: rotate(45deg) translateY(6px); opacity: 1;   }
}

/* === ZONE DIVIDER === */
.zone-divider {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin: 0 auto;
  max-width: 1000px;
  width: 100%;
}

/* === ZONE 2 — ARTIFACT THUMBNAIL ROW === */
.zone-2 {
  max-width: 1000px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.thumbnail-row {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.thumbnail-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  width: 120px;
}

.thumbnail-item img {
  width: 120px;
  height: 155px;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--color-gray-dark);
  border-radius: 2px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  display: block;
}

.thumbnail-label {
  color: var(--color-gray-mid);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
  text-transform: uppercase;
  line-height: 1.4;
}

/* === ZONE 3 — ARTIFACT DETAIL TILES === */
.zone-3 {
  max-width: 1000px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.artifact-tile {
  display: flex;
  flex-direction: row;
  gap: 3rem;
  align-items: flex-start;
  padding: 3rem 0;
}

.artifact-tile + .artifact-tile {
  border-top: 1px solid var(--color-divider);
}

.artifact-tile img {
  width: 320px;
  flex-shrink: 0;
  border: 1px solid var(--color-gray-dark);
  border-radius: 2px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.6);
  display: block;
}

.artifact-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.25rem;
}

.artifact-copy h2 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
  line-height: 1.3;
}

.artifact-copy p {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.85;
}

/* === ZONE 4 — APPENDIX === */
.zone-4 {
  max-width: 1000px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.zone-4 h2 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.zone-4 .appendix-descriptor {
  color: var(--color-gray-mid);
  font-size: 0.875rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.playbook-container {
  border: 1px dashed var(--color-gray-dark);
  border-radius: 2px;
  padding: 1.5rem;
}

.playbook-container iframe {
  width: 100%;
  height: 800px;
  border: none;
  display: block;
  border-radius: 1px;
}

/* === ZONE 5 — FOOTER === */
footer {
  background: var(--color-black);
  max-width: 1000px;
  margin: 0 auto;
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px minmax(0, 1fr);
  max-width: 1000px;
  align-items: center;
  gap: 2rem;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.footer-nav span {
  color: var(--color-gray-dark);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.footer-logo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer-logo-wrap a {
  display: inline-block;
  border-radius: 50%;
}

.footer-logo-wrap a:focus {
  outline: 2px solid var(--color-white);
  outline-offset: 3px;
}

.footer-logo-wrap img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: block;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.footer-right a {
  color: var(--color-gray-dark);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.footer-right a:hover {
  color: var(--color-text);
}

.footer-right a:focus {
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
}

.footer-right span {
  color: var(--color-gray-dark);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* === RESPONSIVE — 768px AND BELOW === */
@media (max-width: 768px) {

  /* — Zone 1 — */
  header {
    padding: 1.5rem;
    overflow: hidden;
  }

  .sketch-prd,
  .sketch-roadmap {
    display: none;
  }

  .blockquote-left {
    margin-right: 0;
  }

  .body-right {
    margin-left: 0;
  }

  .center-composition {
    max-width: 100%;
  }

  h1 {
    font-size: 2rem;
  }

  .sketch-roadmap {
    left: -60px;
  }

  .blockquote-left {
    margin-right: 10%;
  }

  .body-right {
    margin-left: 10%;
  }

  /* — Zone 2 — */
  .thumbnail-row {
    gap: 1.25rem;
    max-width: 400px;
    margin: 0 auto;
  }

  .thumbnail-item {
    width: 100px;
  }

  .thumbnail-item img {
    width: 100px;
    height: 130px;
  }

  /* — Zone 3 — */
  .artifact-tile {
    flex-direction: column-reverse;
    gap: 1.5rem;
  }

  .artifact-tile img {
    width: 100%;
  }

  /* — Zone 4 — */
  .playbook-container iframe {
    height: 600px;
  }

  /* — Zone 5 — */
  footer {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 2rem;
    max-width: 100%;
    text-align: center;
  }

  .footer-nav {
    align-items: center;
  }

  .footer-right {
    align-items: center;
  }

}

/* === RESPONSIVE — 480px AND BELOW === */
@media (max-width: 480px) {

  /* — Zone 1 — sketch images hidden at mobile — */
  .sketch-prd,
  .sketch-roadmap {
    display: none;
  }

  .blockquote-left {
    margin-right: 0;
  }

  .body-right {
    margin-left: 0;
  }

  .logo {
    width: 80px;
    height: 80px;
  }

  nav {
    gap: 1rem;
  }

  nav span {
    font-size: 0.8rem;
  }

  h1 {
    font-size: 1.75rem;
  }

  blockquote {
    font-size: 1rem;
  }

  /* — Zone 3 — */
  .zone-3 {
    padding: 2rem 1rem;
  }

  /* — Zone 4 — */
  .zone-4 {
    display: none;
  }

}