:root {
  --bg-graphite: #121619;
  --panel-graphite: #1c2226;
  --card-graphite: #202528;
  --border-steel: #343e45;
  --text-steel: #8e9ca4;
  --text-cloud: #f1f3f0;
  --signal-orange: #e36a2e;
  --signal-orange-glow: rgba(227, 106, 46, 0.25);
  --stadium-green: #4d7358;
  --stadium-green-light: #6aa87b;
  --accent-cyan: #3da5d9;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: "Space Grotesk", "Inter", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-graphite);
  color: var(--text-cloud);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 15px;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(227, 106, 46, 0.08) 0%, transparent 60%),
    linear-gradient(rgba(32, 37, 40, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(32, 37, 40, 0.4) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

/* SLIM, REFINED, ULTRA-RESPONSIVE NON-STICKY HEADER */
.site-header {
  position: relative;
  width: 100%;
  height: 54px;
  background: #14191c;
  border-bottom: 1px solid var(--border-steel);
  z-index: 1000;
}

.header-container {
  max-width: 1380px;
  margin: 0 auto;
  height: 100%;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text-cloud);
  min-width: 0;
  white-space: nowrap;
}

.brand-logo .logo-icon {
  width: 24px;
  height: 24px;
  min-width: 24px;
  background: var(--signal-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
  box-shadow: 0 0 10px var(--signal-orange-glow);
}

.brand-logo .logo-text {
  font-size: 0.98rem;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-logo .badge-de {
  font-size: 0.6rem;
  font-family: var(--font-mono);
  background: var(--border-steel);
  color: #fff;
  padding: 1px 5px;
  border-radius: 2px;
  text-transform: uppercase;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 1;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-steel);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 0;
  position: relative;
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-cloud);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--signal-orange);
}

.header-right-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* ONE-WORD SLIM BUTTON */
.btn-spec {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 6px 14px;
  background: var(--signal-orange);
  color: #fff;
  border: 1px solid var(--signal-orange);
  border-radius: 2px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.btn-spec:hover {
  background: #f07b42;
  box-shadow: 0 0 12px var(--signal-orange-glow);
}

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

.btn-secondary:hover {
  border-color: var(--signal-orange);
  color: var(--signal-orange);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-steel);
  border-radius: 2px;
  cursor: pointer;
  padding: 6px;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--text-cloud);
  transition: 0.25s;
}

.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 54px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(16, 20, 23, 0.98);
  backdrop-filter: blur(14px);
  padding: 20px 20px;
  z-index: 999;
  flex-direction: column;
  gap: 14px;
  border-bottom: 2px solid var(--signal-orange);
  overflow-y: auto;
}

.mobile-nav-overlay.open {
  display: flex;
}

.mobile-nav-overlay .nav-link {
  font-size: 0.95rem;
  padding: 10px 4px;
  border-bottom: 1px solid rgba(52, 62, 69, 0.6);
}

/* LAYOUT WRAPPERS */
.container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-padding {
  padding: 56px 0;
}

/* HERO SECTION */
.hero-spatial {
  position: relative;
  min-height: 520px;
  border-bottom: 1px solid var(--border-steel);
  background: radial-gradient(circle at 75% 30%, rgba(227, 106, 46, 0.15) 0%, rgba(18, 22, 25, 0.85) 65%);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(77, 115, 88, 0.2);
  border: 1px solid var(--stadium-green);
  padding: 4px 10px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--stadium-green-light);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background: var(--stadium-green-light);
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; filter: drop-shadow(0 0 6px var(--stadium-green-light)); }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
}

.hero-title span.accent-orange {
  color: var(--signal-orange);
}

.hero-subtext {
  font-size: 1rem;
  color: var(--text-steel);
  max-width: 540px;
  margin-bottom: 26px;
}

.hero-metrics-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 14px;
  background: var(--panel-graphite);
  border: 1px solid var(--border-steel);
  border-left: 3px solid var(--signal-orange);
  margin-bottom: 26px;
}

.metric-item .val {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-cloud);
}

.metric-item .lbl {
  font-size: 0.68rem;
  color: var(--text-steel);
  text-transform: uppercase;
  font-family: var(--font-mono);
}

/* 3D CANVAS STADIUM WIREFRAME */
.canvas-container {
  position: relative;
  width: 100%;
  height: 400px;
  background: #151a1d;
  border: 1px solid var(--border-steel);
  box-shadow: inset 0 0 40px rgba(0,0,0,0.6);
  border-radius: 2px;
  overflow: hidden;
}

#stadium3dCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.canvas-overlay-ui {
  position: absolute;
  top: 10px;
  left: 10px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: rgba(18, 22, 25, 0.85);
  border: 1px solid var(--border-steel);
  padding: 5px 8px;
  color: var(--text-steel);
  pointer-events: none;
}

.canvas-controls {
  position: absolute;
  bottom: 10px;
  right: 10px;
  display: flex;
  gap: 5px;
}

.canvas-btn {
  background: rgba(32, 37, 40, 0.85);
  border: 1px solid var(--border-steel);
  color: var(--text-cloud);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 3px 7px;
  cursor: pointer;
}

.canvas-btn:hover {
  border-color: var(--signal-orange);
}

/* MODULAR DATA-GRID CARD COMPONENT */
.section-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border-steel);
  padding-bottom: 14px;
  gap: 16px;
  flex-wrap: wrap;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--signal-orange);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.section-heading {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.filter-bar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-chip {
  background: var(--panel-graphite);
  border: 1px solid var(--border-steel);
  color: var(--text-steel);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.filter-chip.active, .filter-chip:hover {
  background: var(--card-graphite);
  color: var(--text-cloud);
  border-color: var(--signal-orange);
}

.stadium-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 22px;
}

.data-grid-card {
  background: var(--panel-graphite);
  border: 1px solid var(--border-steel);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
  cursor: pointer;
}

.data-grid-card:hover {
  transform: translateY(-3px);
  border-color: var(--signal-orange);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.45);
}

.card-header-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: #171c1f;
  border-bottom: 1px solid var(--border-steel);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.card-stadium-id {
  color: var(--signal-orange);
  font-weight: 700;
}

.card-city-tag {
  color: var(--text-steel);
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-media-wrap {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: #0f1315;
}

.card-media-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
  filter: contrast(1.05) brightness(0.92);
}

.data-grid-card:hover .card-media-wrap img {
  transform: scale(1.03);
  filter: contrast(1.1) brightness(1);
}

.card-badge-overlay {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(18, 22, 25, 0.9);
  border: 1px solid var(--border-steel);
  padding: 3px 7px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-cloud);
}

.card-data-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #14181a;
  border-bottom: 1px solid var(--border-steel);
  border-top: 1px solid var(--border-steel);
}

.strip-item {
  padding: 8px 10px;
  border-right: 1px solid var(--border-steel);
}

.strip-item:last-child {
  border-right: none;
}

.strip-item .strip-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-cloud);
}

.strip-item .strip-lbl {
  font-size: 0.62rem;
  color: var(--text-steel);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.card-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.25;
}

.card-club-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--signal-orange);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-steel);
  margin-bottom: 16px;
  line-height: 1.5;
  flex-grow: 1;
}

.card-feature-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.card-feature-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 6px;
  background: rgba(52, 62, 69, 0.4);
  border: 1px solid var(--border-steel);
  color: var(--text-cloud);
  border-radius: 2px;
}

.card-footer-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid rgba(104, 116, 122, 0.2);
}

.spec-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--signal-orange);
  text-transform: uppercase;
}

.spec-link-btn:hover {
  color: #fff;
}

.decibel-rating {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background: rgba(227, 106, 46, 0.12);
  color: var(--signal-orange);
  padding: 2px 6px;
  border-radius: 2px;
}

/* INTERACTIVE CARD DOSSIER MODAL */
.stadium-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 13, 15, 0.85);
  backdrop-filter: blur(8px);
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.stadium-modal-backdrop.active {
  display: flex;
}

.stadium-modal-card {
  background: var(--panel-graphite);
  border: 1px solid var(--signal-orange);
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
}

.modal-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  background: #14181a;
  border: 1px solid var(--border-steel);
  color: var(--text-cloud);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 4px 8px;
  cursor: pointer;
}

.modal-close-btn:hover {
  border-color: var(--signal-orange);
  color: var(--signal-orange);
}

/* COMPARISON TABLE */
.matrix-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-steel);
  background: var(--bg-graphite);
}

.atlas-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  text-align: left;
  font-size: 0.85rem;
}

.atlas-table th {
  background: #1a2024;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-steel);
  border-bottom: 2px solid var(--signal-orange);
  white-space: nowrap;
}

.atlas-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-steel);
  color: var(--text-cloud);
}

.atlas-table tr:hover td {
  background: rgba(227, 106, 46, 0.04);
}

.atlas-table .code-cell {
  font-family: var(--font-mono);
  font-weight: 600;
}

.tag-standing {
  background: rgba(77, 115, 88, 0.25);
  color: var(--stadium-green-light);
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
}

/* ARTICLE LAYOUT */
.deepdive-header {
  padding: 48px 0 32px 0;
  border-bottom: 1px solid var(--border-steel);
  background: linear-gradient(180deg, rgba(28, 34, 38, 0.7) 0%, rgba(18, 22, 25, 1) 100%);
}

.blueprint-badge {
  display: inline-block;
  background: var(--card-graphite);
  border: 1px solid var(--signal-orange);
  color: var(--signal-orange);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 8px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  padding: 44px 0;
}

.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin: 32px 0 14px 0;
  color: var(--text-cloud);
  border-bottom: 1px solid var(--border-steel);
  padding-bottom: 8px;
}

.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin: 22px 0 10px 0;
  color: var(--signal-orange);
}

.article-content p {
  color: #c5ced4;
  margin-bottom: 18px;
  line-height: 1.7;
  font-size: 0.95rem;
}

.article-content ul {
  margin-bottom: 20px;
  padding-left: 20px;
  color: #c5ced4;
}

.article-content li {
  margin-bottom: 6px;
}

.spec-blueprint-box {
  background: #171c20;
  border: 1px solid var(--border-steel);
  border-left: 4px solid var(--stadium-green);
  padding: 20px;
  margin: 24px 0;
}

.spec-blueprint-box h4 {
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--stadium-green-light);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.sidebar-spec-panel {
  background: var(--panel-graphite);
  border: 1px solid var(--border-steel);
  padding: 20px;
  position: sticky;
  top: 20px;
}

.sidebar-spec-panel h4 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--signal-orange);
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-steel);
  padding-bottom: 6px;
}

.spec-list-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(104, 116, 122, 0.15);
  font-size: 0.82rem;
}

.spec-list-item .key {
  color: var(--text-steel);
  font-family: var(--font-mono);
}

.spec-list-item .val {
  font-weight: 600;
  color: var(--text-cloud);
  font-family: var(--font-mono);
}

/* FORMS */
.form-card {
  background: var(--panel-graphite);
  border: 1px solid var(--border-steel);
  padding: 28px;
  border-radius: 2px;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--text-steel);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  background: #14181a;
  border: 1px solid var(--border-steel);
  color: var(--text-cloud);
  padding: 10px 12px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  border-radius: 2px;
  outline: none;
  transition: border-color 0.2s;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--signal-orange);
}

/* COOKIE BANNER */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(20, 25, 28, 0.98);
  border-top: 2px solid var(--signal-orange);
  backdrop-filter: blur(16px);
  padding: 16px 20px;
  z-index: 9999;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.6);
}

.cookie-banner.visible {
  transform: translateY(0);
}

.cookie-banner-container {
  max-width: 1380px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.cookie-text {
  font-size: 0.82rem;
  color: var(--text-steel);
  max-width: 780px;
}

.cookie-text strong {
  color: var(--text-cloud);
}

.cookie-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn-cookie-accept {
  background: var(--signal-orange);
  color: #fff;
  border: none;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
}

.btn-cookie-reject {
  background: transparent;
  border: 1px solid var(--border-steel);
  color: var(--text-cloud);
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  cursor: pointer;
  text-transform: uppercase;
}

/* FOOTER */
.site-footer {
  background: #0d1012;
  border-top: 1px solid var(--border-steel);
  padding: 48px 0 24px 0;
  font-size: 0.82rem;
  color: var(--text-steel);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--signal-orange);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a:hover {
  color: var(--signal-orange);
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-steel);
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

/* RESPONSIVE QUERIES */
@media (max-width: 1100px) {
  .nav-desktop {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .header-container {
    padding: 0 12px;
  }
  .brand-logo .logo-text {
    font-size: 0.88rem;
  }
  .brand-logo .badge-de {
    display: none;
  }
  .btn-spec {
    padding: 5px 10px;
    font-size: 0.7rem;
  }
  .stadium-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-metrics-bar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .section-padding {
    padding: 38px 0;
  }
}