/* ==========================================================================
   LAYOUT: HEADER NAV & FOOTER
   ========================================================================== */

/* HEADER NAVIGATION (Sticky with Frosted Parchment Backdrop) */
header.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(246, 239, 228, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

html.dark header.nav,
[data-theme="dark"] header.nav {
  background: rgba(26, 23, 21, 0.94);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.nav-brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}

.wordmark em {
  font-style: italic;
  color: var(--rust);
}

/* NAVIGATION LINKS */
nav.links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.95rem;
}

nav.links a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  color: var(--ink);
  transition: border-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

nav.links a:hover,
nav.links a:focus-visible {
  border-color: var(--rust);
  color: var(--rust);
}

nav.links a.active {
  border-color: var(--rust);
  color: var(--rust);
  font-weight: 700;
}

/* BOLD NIGHT MODE TOGGLE BUTTON */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 700;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--ink);
  background: var(--paper-dim);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle-btn:hover {
  transform: translateY(-2px);
  border-color: var(--rust);
  color: var(--rust);
}

.theme-toggle {
  cursor: pointer;
}

.theme-icon,
.theme-toggle-icon {
  font-size: 1rem;
  line-height: 1;
}

.theme-label {
  font-size: 0.86rem;
}

/* ICON-ONLY NIGHT MODE TOGGLE (Position 1B) */
.theme-toggle-icon-only {
  width: 32px;
  height: 32px;
  min-width: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1.5px solid var(--line-strong);
  background: var(--paper-dim);
  color: var(--ink);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  margin-left: 2px;
  flex-shrink: 0;
}

.theme-toggle-icon-only:hover {
  transform: scale(1.1);
  border-color: var(--rust);
  color: var(--rust);
  background: var(--paper-warm);
}

.theme-toggle-icon-only .theme-icon,
.theme-toggle-icon-only .theme-toggle-icon {
  font-size: 1.05rem;
  line-height: 1;
}

/* MOBILE HORIZONTAL PILL NAV (Decision 1: Option A) */
@media (max-width: 680px) {
  header.nav {
    padding: 16px 0 12px;
  }

  .nav-container {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .nav-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }

  .nav-scroll-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
  }

  /* Right-edge fade indicator signaling more tabs */
  .nav-scroll-wrapper::after {
    content: "";
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 28px;
    background: linear-gradient(to right, transparent, var(--paper));
    pointer-events: none;
  }

  nav.links {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 10px;
    padding: 4px 0 6px;
  }

  nav.links::-webkit-scrollbar {
    display: none;
  }

  nav.links a {
    padding: 6px 14px;
    background: var(--paper-dim);
    border: 1px solid var(--line);
    border-radius: var(--radius-pill);
    font-size: 0.88rem;
    flex-shrink: 0;
  }

  nav.links a.active {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
  }
}

/* FOOTER */
footer {
  padding: 44px 0 30px;
  font-size: 0.92rem;
  color: var(--text-muted);
  border-top: 1px solid var(--line);
  background: var(--paper);
  transition: background-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 28px;
}

.footer-grid .wordmark {
  font-size: 1.35rem;
  display: inline-block;
  margin-bottom: 12px;
}

.footer-grid p {
  max-width: 40ch;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-col a {
  display: block;
  text-decoration: none;
  margin-bottom: 10px;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--rust);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
}

footer .hashtag {
  color: var(--rust);
  font-weight: 700;
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
}

@media (max-width: 540px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   HERO & COLLAGE SECTION (Requirement 1: Fluid Multi-Tier Responsive Layout)
   ========================================================================== */
.hero {
  position: relative;
  z-index: 2;
  padding: 48px 0 36px;
}

.hero-row {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
}

.hero-text-top {
  flex: 1;
  min-width: 0;
  max-width: 48ch;
  padding-top: 6px;
}

.hero-text-full {
  max-width: 72ch;
  margin: 64px auto 0;
}

.hero-prompt-row {
  text-align: center;
  margin-top: 32px;
}

.hero h1 {
  font-size: clamp(2.3rem, 5vw, 3.8rem);
  max-width: 14ch;
  line-height: 1.1;
}

.hero h1 .swash {
  display: inline-block;
  font-style: italic;
  color: var(--rust);
  transform: rotate(-1.4deg);
}

.hero p.lede {
  margin-top: 20px;
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.hero-text-top p.lede {
  max-width: 44ch;
}

.cta-row {
  display: flex;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.cta-row.centered {
  justify-content: center;
}

/* HERO COLLAGE: Möbius loop animation */
.collage {
  position: relative;
  width: 420px;
  height: 400px;
  flex-shrink: 0;
  margin: 0 auto;
}

.card-photo {
  position: absolute;
  pointer-events: none;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  padding: 10px 10px 12px;
  box-shadow: 3px 4px 0 rgba(43, 36, 32, 0.08);
  font-family: var(--font-body);
  width: 190px;
  border-radius: var(--radius-sm);
  transition: top 0.6s ease, left 0.6s ease, transform 0.6s ease, opacity 0.5s ease;
}

.card-photo .swatch {
  width: 100%;
  height: 140px;
  background-size: cover;
  background-position: center;
  border-radius: 2px;
}

.card-photo figcaption {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--text-subtle);
  line-height: 1.4;
}

.card-photo.slot-top {
  top: 0;
  left: 115px;
  transform: rotate(-2deg);
  z-index: 3;
  opacity: 1;
}

.card-photo.slot-bl {
  top: 210px;
  left: 0;
  transform: rotate(3deg);
  z-index: 2;
  opacity: 1;
}

.card-photo.slot-br {
  top: 210px;
  left: 230px;
  transform: rotate(-2.5deg);
  z-index: 2;
  opacity: 1;
}

.card-photo.slot-enter {
  top: 0;
  left: -210px;
  transform: rotate(0deg);
  z-index: 1;
  opacity: 0;
  pointer-events: none;
}

/* RESPONSIVE COLLAGE & HERO (Tablet: 680px - 960px) */
@media (max-width: 960px) {
  .hero-row {
    flex-direction: column-reverse;
    gap: 32px;
    align-items: center;
  }

  .hero-text-top {
    max-width: 100%;
    text-align: left;
  }

  .hero h1 {
    max-width: 100%;
  }

  .hero-text-top p.lede {
    max-width: 100%;
  }
}

/* RESPONSIVE COLLAGE & HERO (Mobile: < 680px) */
@media (max-width: 680px) {
  .hero {
    padding: 32px 0 24px;
  }

  .collage {
    width: 320px;
    height: 320px;
    transform: scale(0.82);
    transform-origin: top center;
  }

  .card-photo {
    width: 165px;
    padding: 8px 8px 10px;
  }

  .card-photo .swatch {
    height: 115px;
  }

  .card-photo.slot-top {
    top: 0;
    left: 80px;
  }

  .card-photo.slot-bl {
    top: 170px;
    left: 0;
  }

  .card-photo.slot-br {
    top: 170px;
    left: 170px;
  }
}



/* ==========================================================================
   EDITORIAL BRIDGE SECTION (Option B: Restored Turn & Audience Anchor)
   ========================================================================== */
.editorial-bridge-section {
  position: relative;
  z-index: 2;
  margin: 36px 0 20px;
  background: var(--paper-dim);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 48px 0 44px;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.bridge-inner {
  max-width: 72ch;
  margin: 0 auto;
  text-align: center;
}

.bridge-quote {
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--ink);
  margin-bottom: 20px;
}

.bridge-sub {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.bridge-prompt {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--rust);
  margin-bottom: 20px;
  font-weight: 500;
}

@media (max-width: 680px) {
  .editorial-bridge-section {
    padding: 36px 0 32px;
    margin: 24px 0 16px;
  }
  .bridge-quote {
    font-size: 1.15rem;
    line-height: 1.45;
  }
  .bridge-sub {
    font-size: 0.98rem;
  }
  .bridge-prompt {
    font-size: 1.15rem;
  }
}