/*
 * Vital Structures — Model Page Styles
 * Sticky sidebar nav, product sections, configuration options
 * Imports after: tokens.css → system.css → styles.css → this file
 */

/* ─── Model Page Layout ─── */
.model-main {
  max-width: var(--max, 1200px);
  margin: 0 auto;
}

/* ─── Model Top Navigation Bar ─── */
.model-topnav {
  position: sticky;
  top: 64px;
  z-index: 90;
  background: white;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

/* Override system.css nav {} styles that leak into the inner <nav> element */
.model-topnav-links {
  position: static !important;
  top: auto !important;
  z-index: auto !important;
  background: transparent !important;
  border-bottom: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  height: auto !important;
}

.model-topnav-inner {
  max-width: var(--max, 1200px);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  padding: 0 var(--sp-4);
  height: 48px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.model-topnav-inner::-webkit-scrollbar {
  display: none;
}

.model-topnav-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  white-space: nowrap;
  flex-shrink: 0;
  padding-right: var(--sp-3);
  border-right: 1px solid var(--border);
}

.model-topnav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.model-topnav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--mid);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--r-md, 6px);
  white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast);
}

.model-topnav-link:hover {
  color: var(--dark);
  background: var(--light);
}

.model-topnav-link.active {
  color: var(--primary);
  background: rgba(61, 90, 58, 0.08);
  font-weight: 600;
}

/* Kill any system.css ::after underlines on topnav links */
.model-topnav-link::after {
  display: none !important;
}

/* Adjust scroll-margin for sections to account for both navs */
.model-main .model-section {
  scroll-margin-top: 120px;
}

@media (max-width: 768px) {
  .model-topnav {
    top: 64px;
  }
  .model-topnav-inner {
    gap: var(--sp-3);
    padding: 0 var(--sp-2);
    height: 44px;
  }
  .model-topnav-label {
    font-size: 10px;
  }
  .model-topnav-link {
    font-size: 12px;
    padding: 5px 10px;
  }
}

/* ─── Model Hero ─── */
.model-hero {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: var(--sp-10) var(--sp-6) var(--sp-8);
}

.model-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.model-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.model-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,26,24,0.85) 0%, rgba(26,26,24,0.3) 50%, rgba(61,90,58,0.15) 100%);
}

.model-hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.model-hero-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin-bottom: var(--sp-2);
}

.model-hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  color: white;
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin-bottom: var(--sp-2);
}

.model-hero h1 em {
  font-style: normal;
  color: var(--tertiary);
}

.model-hero-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  margin-bottom: var(--sp-4);
  max-width: 560px;
}

.model-hero-stats {
  display: flex;
  gap: var(--sp-5);
  margin-top: var(--sp-4);
}

.model-hero-stat-val {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--tertiary);
}

.model-hero-stat-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-top: 2px;
}

/* ─── Model Sections ─── */
.model-section {
  padding: var(--sp-10) var(--sp-6);
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 80px;
}

.model-section:last-child {
  border-bottom: none;
}

.model-section-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--sp-2);
}

.model-section h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--dark);
  line-height: 1.15;
  margin-bottom: var(--sp-4);
}

.model-section p {
  font-size: 16px;
  color: var(--mid);
  line-height: 1.75;
  max-width: 680px;
}

.model-section p + p {
  margin-top: var(--sp-3);
}

/* ─── Overview Stats ─── */
.model-overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
  margin-top: var(--sp-6);
  align-items: start;
}

.model-overview-text p {
  max-width: none;
}

.model-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.model-stat-card {
  background: var(--light);
  padding: var(--sp-4);
  text-align: center;
}

.model-stat-val {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.model-stat-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ─── Specs Section (dark) ─── */
.model-section.model-specs-section {
  background: var(--primary);
  padding: var(--sp-10) var(--sp-6);
}

.model-section.model-specs-section .model-section-kicker {
  color: rgba(255,255,255,0.5);
}

.model-section.model-specs-section h2 {
  color: white;
}

.model-specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.12);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-top: var(--sp-5);
}

.model-spec-card {
  background: var(--primary);
  padding: var(--sp-4);
}

.model-spec-card-val {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--tertiary);
  margin-bottom: 6px;
}

.model-spec-card-label {
  font-size: 12px;
  font-weight: 600;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.model-spec-card-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  line-height: 1.5;
}

/* ─── Image Gallery Grid ─── */
.model-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-2);
  margin-top: var(--sp-5);
}

.model-gallery-item {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.model-gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-std);
}

.model-gallery-item:hover img {
  transform: scale(1.04);
}

.model-gallery-item.wide {
  grid-column: span 2;
  aspect-ratio: 16/9;
}

/* ─── Systems/Diff Cards (model page variant) ─── */
.model-diff-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-top: var(--sp-5);
}

.model-diff-card {
  background: white;
  padding: var(--sp-5) var(--sp-4);
  transition: background var(--t-fast);
}

.model-diff-card:hover {
  background: var(--light);
}

.model-diff-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: var(--sp-1);
}

.model-diff-card p {
  font-size: 14px;
  color: var(--mid);
  line-height: 1.65;
  max-width: none;
}

.model-diff-card .spec-highlight {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  margin-top: var(--sp-2);
  letter-spacing: 0.04em;
}

/* ─── Applications / Audience (dark) ─── */
.model-section.model-apps-section {
  background: var(--dark);
  padding: var(--sp-10) var(--sp-6);
}

.model-section.model-apps-section .model-section-kicker {
  color: rgba(255,255,255,0.4);
}

.model-section.model-apps-section h2 {
  color: white;
}

.model-apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

.model-app-card {
  padding: var(--sp-4);
  border-radius: var(--r-lg);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  transition: background var(--t-std), border-color var(--t-std);
}

.model-app-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(196,168,122,0.2);
}

.model-app-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: white;
  margin-bottom: var(--sp-1);
}

.model-app-card p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
  max-width: none;
}

/* ─── Configuration Options ─── */
.model-config-list {
  margin-top: var(--sp-5);
}

.model-config-item {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  margin-bottom: var(--sp-2);
  overflow: hidden;
}

.model-config-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  background: var(--light);
  border: none;
  cursor: pointer;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  text-align: left;
  transition: background var(--t-fast);
}

.model-config-toggle:hover {
  background: var(--light-warm);
}

.model-config-toggle::after {
  content: '+';
  font-size: 20px;
  color: var(--primary);
  transition: transform var(--t-fast);
}

.model-config-toggle.active::after {
  content: '−';
}

.model-config-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.model-config-body.active {
  max-height: 600px;
}

.model-config-content {
  padding: var(--sp-4);
  font-size: 14px;
  color: var(--mid);
  line-height: 1.7;
}

.model-config-content strong {
  color: var(--dark);
}

/* ─── Compare Models Section ─── */
.model-compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
  margin-top: var(--sp-5);
}

.model-compare-card {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--dark);
  transition: transform var(--t-std), box-shadow var(--t-std);
}

.model-compare-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
}

.model-compare-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}

.model-compare-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-std);
}

.model-compare-card:hover .model-compare-card-img img {
  transform: scale(1.05);
}

.model-compare-card-body {
  padding: var(--sp-3) var(--sp-3);
}

.model-compare-card-badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 4px;
}

.model-compare-card-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.model-compare-card-desc {
  font-size: 13px;
  color: var(--mid);
}

/* ─── Model CTA ─── */
.model-cta {
  background: var(--primary);
  padding: var(--sp-10) var(--sp-6);
  text-align: center;
}

.model-cta h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  color: white;
  margin-bottom: var(--sp-3);
}

.model-cta p {
  font-size: 16px;
  color: rgba(255,255,255,0.78);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto var(--sp-5);
}

/* ─── Responsive ─── */
@media (max-width: 1040px) {
  .model-overview-grid {
    grid-template-columns: 1fr;
  }
  .model-specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .model-gallery-grid {
    grid-template-columns: 1fr 1fr;
  }
  .model-compare-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .model-hero {
    min-height: 400px;
    padding: var(--sp-8) var(--sp-3) var(--sp-6);
  }
  .model-section {
    padding: var(--sp-6) var(--sp-3);
  }
  .model-section.model-specs-section,
  .model-section.model-apps-section {
    padding: var(--sp-6) var(--sp-3);
  }
  .model-cta {
    padding: var(--sp-6) var(--sp-3);
  }
  .model-diff-grid {
    grid-template-columns: 1fr;
  }
  .model-apps-grid {
    grid-template-columns: 1fr;
  }
  .model-hero-stats {
    flex-wrap: wrap;
    gap: var(--sp-3);
  }
}

@media (max-width: 640px) {
  .model-specs-grid {
    grid-template-columns: 1fr;
  }
  .model-gallery-grid {
    grid-template-columns: 1fr;
  }
  .model-gallery-item.wide {
    grid-column: span 1;
  }
  .model-stat-grid {
    grid-template-columns: 1fr;
  }
  .model-compare-grid {
    grid-template-columns: 1fr;
  }
}