/* ==========================================================================
   WHITEBRIDGE ONE LTD. — THE ARCHITECTURAL SERIES STYLESHEET (bridges.css)
   Page: /bridges/
   Depends on: /style.css (Global design tokens, typography, frames, header & footer)
   ========================================================================== */

/* Header adjustment: remove left divider on ◆ London when nav links are absent */
.header-right > .presence-badge:only-child {
  padding-left: 0;
  border-left: none;
}

/* ==========================================================================
   1. MONOGRAPH INTRODUCTION & PLATE INDEX BAR
   ========================================================================== */

.bridges-intro-section {
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(
    180deg,
    rgba(13, 38, 68, 0) 0%,
    rgba(17, 46, 82, 0.28) 100%
  );
}

.bridges-intro-inner {
  padding: 76px 0 60px;
  max-width: 900px;
}

.bridges-page-title {
  margin-bottom: 32px;
}

.bridges-page-title .title-line {
  display: block;
}

.bridges-thesis {
  max-width: 820px;
}

.bridges-thesis p {
  font-size: clamp(1.25rem, 0.45vw + 1.1rem, 1.4375rem); /* 20px–23px */
  line-height: 1.66;
  color: var(--text-main);
}

.bridges-thesis p + p {
  margin-top: 22px;
}

/* Architectural Plate Index Bar (Echoes Staple Inn Coordinate Bar) */
.plate-index-bar {
  border-top: 1px solid var(--border-color);
  padding: 16px 0;
}

.plate-index-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.plate-index-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.plate-index-link {
  font-family: var(--font-sans);
  font-size: 0.75rem; /* 12px */
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 3px 2px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}

.plate-index-link:hover {
  color: var(--text-white);
  border-bottom-color: var(--text-white);
}

.plate-index-num {
  opacity: 0.65;
  margin-right: 4px;
}

.plate-index-sep {
  color: var(--text-muted);
  opacity: 0.4;
  font-size: 0.75rem;
  user-select: none;
}

/* ==========================================================================
   2. MONOGRAPH ENTRIES (Two-Column Architectural Folio)
   ========================================================================== */

.bridges-catalogue-section {
  padding: 12px 0 112px;
}

.bridge-entry {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 72px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--border-color);
  scroll-margin-top: var(--header-height);
}

.bridge-entry:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* Left Column: Reuses .capability-media (1500/2009) from /style.css */
.bridge-plate {
  margin: 0;
}

/* Right Column: Architectural & Systems Dossier */
.bridge-dossier {
  padding-top: 4px;
  max-width: 640px;
}

.bridge-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 0.75rem; /* 12px */
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.bridge-kicker-diamond {
  width: 5px;
  height: 5px;
}

.bridge-title {
  font-size: clamp(2.125rem, 2.5vw + 1rem, 2.75rem); /* 34px–44px */
  color: var(--text-white);
  margin-bottom: 10px;
}

.bridge-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.4375rem; /* 23px */
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 28px;
}

/* Technical Specification Grid (Single-Row Architectural Ledger) */
.bridge-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 32px;
  padding: 20px 0;
  margin-bottom: 28px;
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border-color);
}

.bridge-spec-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bridge-spec-item dt {
  font-family: var(--font-sans);
  font-size: 0.6875rem; /* 11px */
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.bridge-spec-item dd {
  font-family: var(--font-serif);
  font-size: 1.1875rem; /* 19px */
  font-weight: 500;
  line-height: 1.35;
  color: var(--text-white);
}

/* Systems Analogy Prose */
.bridge-essay p {
  font-size: 1.25rem; /* 20px — matches main body prose */
  line-height: 1.68;
  color: var(--text-main);
}

.bridge-essay p + p {
  margin-top: 18px;
}

/* Footer Entity Home Link Hover */
.legal-entity a {
  color: var(--text-white);
  border-bottom: 1px solid transparent;
}

.legal-entity a:hover {
  border-bottom-color: var(--border-strong);
}

/* ==========================================================================
   3. RESPONSIVE BREAKPOINTS (Aligned with /style.css 991px & 659px Thresholds)
   ========================================================================== */

/* Compact Two-Column Layout for Landscape Phones & Portrait Tablets (660px–991px) */
@media (max-width: 991px) {
  .bridges-intro-inner {
    padding: 60px 0 48px;
  }

  .bridges-page-title {
    margin-bottom: 24px;
  }

  .bridge-entry {
    grid-template-columns: 5fr 7fr;
    gap: 36px;
    padding: 56px 0;
  }

  .bridge-title {
    font-size: clamp(1.875rem, 2.2vw + 0.8rem, 2.375rem);
    margin-bottom: 8px;
  }

  .bridge-subtitle {
    font-size: 1.25rem;
    margin-bottom: 20px;
  }

  .bridge-specs {
    gap: 14px 20px;
    padding: 16px 0;
    margin-bottom: 20px;
  }

  .bridge-spec-item dd {
    font-size: 1.0625rem;
  }

  .bridge-essay p {
    font-size: 1.125rem;
    line-height: 1.62;
  }
}

/* Portrait Mobile Layout (< 660px): Artwork Plate strictly first, Dossier strictly second */
@media (max-width: 659px) {
  .bridges-intro-inner {
    padding: 52px 0 42px;
  }

  .plate-index-inner .divider-line {
    display: none;
  }

  .plate-index-inner {
    justify-content: center;
  }

  .plate-index-nav {
    gap: 8px 12px;
  }

  .plate-index-link {
    font-size: 0.6875rem;
    letter-spacing: 0.12em;
  }

  .bridges-catalogue-section {
    padding: 4px 0 80px;
  }

  .bridge-entry {
    display: flex;
    flex-direction: column;
    gap: 32px;
    padding: 52px 0;
  }

  .bridge-dossier {
    max-width: 100%;
  }

  .bridge-title {
    font-size: 2.125rem;
  }

  .bridge-subtitle {
    font-size: 1.3125rem;
    margin-bottom: 22px;
  }

  .bridge-specs {
    grid-template-columns: auto 1fr;
    gap: 16px 32px;
    padding: 18px 0;
    margin-bottom: 24px;
  }

  .bridge-spec-item dd {
    font-size: 1.125rem;
  }

  .bridge-essay p {
    font-size: 1.25rem;
    line-height: 1.65;
  }
}