/**
 * HTD Steel - Project Portfolio & Single Case Study Styling
 * 
 * Target: /du-an/ & Single Projects (/haneda-jal/, /fukuoka/, /smc-c2/, /tokyo-a-arena-2/, /toshiba/, /mitaka/, /tsukuba/)
 * Upgraded via design-taste-frontend & high-end-visual-design standards.
 */

:root {
  --htd-navy: #0F172A;
  --htd-navy-dark: #0B1120;
  --htd-navy-card: #1E293B;
  --htd-blue: #0774BB;
  --htd-blue-dark: #055A93;
  --htd-blue-light: #F0F9FF;
  --htd-cyan: #38BDF8;
  --htd-gray-light: #F8FAFC;
  --htd-border: #E2E8F0;
  --htd-border-dark: #334155;
  --htd-text-main: #1E293B;
  --htd-text-muted: #64748B;
  --htd-text-light: #94A3B8;
  --htd-radius-xl: 20px;
  --htd-radius-lg: 14px;
  --htd-radius-md: 10px;
  --htd-radius-sm: 6px;
  --htd-font-mono: 'JetBrains Mono', Consolas, Monaco, monospace;
  --htd-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Suppress any lingering Flatsome duplicate headers/banners */
.blog-header-wrapper,
.page-title.blog-featured-title,
.htd-single-project-wrap .page-title,
.htd-projects-hub-wrap .blog-header-wrapper,
.htd-projects-hub-wrap .page-title,
.htd-projects-hub-wrap .entry-header {
  display: none !important;
}

/* Eliminate white gap between Flatsome header and hero */
.htd-projects-hub-wrap,
#content.htd-projects-hub-wrap,
.page-wrapper.htd-projects-hub-wrap {
  padding-top: 0 !important;
  margin-top: 0 !important;
}

body:has(.htd-projects-hub-wrap) #main,
body.page-template-page-du-an #main,
.page-template-page-du-an #main {
  padding-top: 0 !important;
  margin-top: 0 !important;
}

/* ==========================================================================
   1. HERO SECTION (ARCHIVE /du-an/)
   ========================================================================== */
.htd-project-hero {
  background: 
    radial-gradient(circle at 80% 20%, rgba(7, 116, 187, 0.18) 0%, transparent 50%),
    radial-gradient(circle at 15% 80%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
    linear-gradient(135deg, #070B14 0%, #0B1120 40%, #0F172A 100%);
  color: #FFFFFF;
  padding: 68px 0 54px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.htd-project-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.htd-project-hero__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
  position: relative;
  z-index: 2;
}

/* Telemetry Tag */
.htd-project-hero__telemetry-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 9999px;
  padding: 4px 14px;
  margin-bottom: 16px;
  font-family: var(--htd-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: #BAE6FD;
}

.htd-telemetry-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #38BDF8;
  box-shadow: 0 0 8px #38BDF8;
  animation: htdPulse 2s infinite ease-in-out;
}

@keyframes htdPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.htd-project-hero__badge-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.htd-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #E2E8F0;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 9999px;
  letter-spacing: 0.3px;
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
}

.htd-hero-badge svg {
  color: var(--htd-cyan);
}

.htd-hero-badge:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(56, 189, 248, 0.35);
}

.htd-project-hero__title {
  color: #FFFFFF !important;
  font-size: 2.65rem;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.htd-project-hero__subtitle {
  color: #94A3B8;
  font-size: 1.12rem;
  line-height: 1.65;
  max-width: 780px;
  margin: 0 auto 32px;
}

/* Metrics Counter Bar */
.htd-project-hero__metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 24px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 920px;
  margin: 0 auto;
}

.htd-hero-metric-item {
  text-align: center;
  position: relative;
}

.htd-hero-metric-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -10px;
  top: 20%;
  height: 60%;
  width: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.htd-hero-metric-val {
  display: block;
  font-family: var(--htd-font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.2;
}

.htd-hero-metric-label {
  font-size: 0.78rem;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 6px;
  font-weight: 500;
}

/* ==========================================================================
   2. FILTER TABS: MECHANICAL FLOATING ISLAND
   ========================================================================== */
.htd-project-filter-wrap {
  background: #FFFFFF;
  border-bottom: 1px solid var(--htd-border);
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}

.htd-filter-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 20px;
}

.htd-filter-nav-island {
  padding: 10px 0;
  width: 100%;
}

.htd-filter-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.htd-filter-btn {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  color: var(--htd-text-muted);
  font-size: 0.84rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 9999px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.25s var(--htd-ease-out);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}

.htd-filter-btn:hover {
  background: #EDF2F7;
  color: var(--htd-navy);
  border-color: #CBD5E1;
}

.htd-filter-btn.active {
  background: var(--htd-navy);
  color: #FFFFFF;
  border-color: var(--htd-navy);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.2);
}

.htd-filter-count {
  font-size: 0.72rem;
  font-family: var(--htd-font-mono);
  background: rgba(0, 0, 0, 0.06);
  color: var(--htd-text-muted);
  padding: 1px 7px;
  border-radius: 9999px;
  line-height: 1.4;
}

.htd-filter-btn.active .htd-filter-count {
  background: rgba(56, 189, 248, 0.25);
  color: var(--htd-cyan);
}

/* ==========================================================================
   3. DOUBLE-BEZEL ARCHITECTURE & FLAGSHIP SHOWCASE
   ========================================================================== */
.htd-projects-section {
  padding: 44px 0 80px;
  background: #F8FAFC;
}

/* Base Doppelrand Shell & Core */
.htd-bezel-shell {
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: var(--htd-radius-xl);
  padding: 5px;
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.04);
  transition: all 0.35s var(--htd-ease-out);
  height: 100%;
}

.htd-bezel-core {
  background: #FFFFFF;
  border-radius: calc(var(--htd-radius-xl) - 5px);
  border: 1px solid rgba(226, 232, 240, 0.6);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Viewfinder Corner Crosshairs */
.htd-viewfinder-corners .corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(56, 189, 248, 0.5);
  pointer-events: none;
  z-index: 5;
  transition: all 0.3s ease;
}

.htd-viewfinder-corners .corner.tl { top: 12px; left: 12px; border-right: none; border-bottom: none; }
.htd-viewfinder-corners .corner.tr { top: 12px; right: 12px; border-left: none; border-bottom: none; }
.htd-viewfinder-corners .corner.bl { bottom: 12px; left: 12px; border-right: none; border-top: none; }
.htd-viewfinder-corners .corner.br { bottom: 12px; right: 12px; border-left: none; border-top: none; }

/* 3.1 FLAGSHIP SPOTLIGHT CARD (Asymmetric 12-col) */
.htd-flagship-wrap {
  margin-bottom: 34px;
}

.htd-flagship-wrap .htd-bezel-shell {
  padding: 6px;
  border-color: #CBD5E1;
  box-shadow: 0 8px 30px -4px rgba(15, 23, 42, 0.08);
}

.htd-flagship-wrap .htd-bezel-shell:hover {
  border-color: #94A3B8;
  box-shadow: 0 16px 40px -6px rgba(15, 23, 42, 0.12);
}

.htd-flagship-card {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  min-height: 440px;
}

.htd-flagship-card__media {
  position: relative;
  background: #0B1120;
  overflow: hidden;
}

.htd-flagship-card__link-wrap {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.htd-flagship-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--htd-ease-out);
}

.htd-flagship-card:hover .htd-flagship-card__img {
  transform: scale(1.04);
}

.htd-flagship-card:hover .htd-viewfinder-corners .corner {
  border-color: var(--htd-cyan);
  transform: scale(1.15);
}

.htd-flagship-card__badges {
  position: absolute;
  top: 14px;
  left: 14px;
  display: flex;
  gap: 8px;
  z-index: 3;
}

.htd-badge-market {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  color: #F8FAFC;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--htd-radius-sm);
  border-left: 3px solid #10B981;
  letter-spacing: 0.3px;
}

.htd-badge-flagship {
  background: rgba(7, 116, 187, 0.9);
  backdrop-filter: blur(8px);
  color: #FFFFFF;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--htd-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.htd-flagship-cad-overlay {
  position: absolute;
  bottom: 12px;
  left: 14px;
  right: 14px;
  z-index: 3;
}

.htd-cad-marker {
  display: inline-block;
  background: rgba(11, 17, 32, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(6px);
  color: #7DD3FC;
  font-family: var(--htd-font-mono);
  font-size: 0.68rem;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

/* Flagship Content Side */
.htd-flagship-card__content {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  background: #FFFFFF;
}

.htd-flagship-card__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
}

.htd-badge-cat {
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  color: #1D4ED8;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--htd-radius-sm);
}

.htd-flagship-card__tonnage {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.htd-tonnage-label {
  font-size: 0.75rem;
  color: var(--htd-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.htd-tonnage-val {
  font-family: var(--htd-font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--htd-blue);
}

.htd-flagship-card__title {
  font-size: 1.7rem;
  font-weight: 800;
  margin: 0 0 4px;
  line-height: 1.25;
}

.htd-flagship-card__title a {
  color: var(--htd-navy);
  text-decoration: none;
  transition: color 0.2s;
}

.htd-flagship-card__title a:hover {
  color: var(--htd-blue);
}

.htd-flagship-card__full-title {
  color: #475569;
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 14px;
}

.htd-flagship-card__desc {
  font-size: 0.92rem;
  color: var(--htd-text-muted);
  line-height: 1.6;
  margin: 0 0 18px;
}

.htd-flagship-card__specs-panel {
  background: var(--htd-gray-light);
  border: 1px solid #E2E8F0;
  border-radius: var(--htd-radius-md);
  padding: 14px 16px;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.htd-fspec-row {
  display: flex;
  align-items: center;
  font-size: 0.84rem;
}

.htd-fspec-label {
  width: 130px;
  flex-shrink: 0;
  color: var(--htd-text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.htd-fspec-val {
  color: var(--htd-navy);
  font-weight: 600;
}

.htd-fspec-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.htd-fspec-tag {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: #334155;
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.htd-flagship-card__footer {
  margin-top: auto;
}

/* Button-in-Button Island CTA */
.htd-btn-island-primary {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--htd-navy);
  color: #FFFFFF !important;
  font-size: 0.94rem;
  font-weight: 700;
  padding: 6px 6px 6px 20px;
  border-radius: 9999px;
  text-decoration: none;
  transition: all 0.3s var(--htd-ease-out);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.2);
}

.htd-btn-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--htd-ease-out);
  flex-shrink: 0;
  color: #FFFFFF;
}

.htd-btn-island-primary:hover {
  background: var(--htd-blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(7, 116, 187, 0.35);
}

.htd-btn-island-primary:hover .htd-btn-icon-wrap {
  background: #FFFFFF;
  color: var(--htd-blue);
  transform: translate(2px, -2px);
}

.htd-btn-island-primary:active {
  transform: translateY(0) scale(0.98);
}

/* ==========================================================================
   3.2 MODULAR ARCHITECTURAL GRID (CARDS)
   ========================================================================== */
.htd-projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.htd-pcard {
  display: flex;
  flex-direction: column;
}

.htd-pcard.is-hidden,
.htd-flagship-wrap.is-hidden {
  display: none !important;
}

.htd-pcard .htd-bezel-shell:hover {
  transform: translateY(-5px);
  border-color: #CBD5E1;
  box-shadow: 0 16px 32px -4px rgba(15, 23, 42, 0.1);
}

.htd-pcard__media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #0B1120;
}

.htd-pcard__media-link {
  display: block;
  width: 100%;
  height: 100%;
}

.htd-pcard__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--htd-ease-out);
}

.htd-pcard:hover .htd-pcard__img {
  transform: scale(1.06);
}

.htd-pcard:hover .htd-viewfinder-corners .corner {
  border-color: var(--htd-cyan);
  transform: scale(1.1);
}

.htd-pcard__badges {
  position: absolute;
  top: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 2;
  pointer-events: none;
}

.htd-pcard__badges .htd-badge-market {
  font-size: 0.7rem;
  padding: 3px 8px;
}

.htd-pcard__badges .htd-badge-cat {
  font-size: 0.7rem;
  padding: 3px 8px;
}

.htd-pcard__body {
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.htd-pcard__metric-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed #E2E8F0;
}

.htd-pcard__tonnage-label {
  font-size: 0.75rem;
  color: var(--htd-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.htd-pcard__tonnage-val {
  font-family: var(--htd-font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--htd-blue);
}

.htd-pcard__title {
  font-size: 1.18rem;
  font-weight: 700;
  margin: 0 0 8px;
  line-height: 1.35;
}

.htd-pcard__title a {
  color: var(--htd-navy);
  text-decoration: none;
  transition: color 0.2s;
}

.htd-pcard__title a:hover {
  color: var(--htd-blue);
}

.htd-pcard__desc {
  font-size: 0.88rem;
  color: var(--htd-text-muted);
  line-height: 1.55;
  margin-bottom: 16px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.htd-pcard__specs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--htd-gray-light);
  border-radius: var(--htd-radius-sm);
  padding: 10px 12px;
  margin-bottom: 16px;
  border: 1px solid #EDF2F7;
}

.htd-pcard__spec-item {
  font-size: 0.82rem;
  color: var(--htd-text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.htd-pcard__spec-item svg {
  color: var(--htd-blue);
  flex-shrink: 0;
}

.htd-pcard__footer {
  margin-top: auto;
  border-top: 1px solid #F1F5F9;
  padding-top: 12px;
}

.htd-pcard__link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  color: var(--htd-navy);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.2s;
}

.htd-link-icon-wrap {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #F1F5F9;
  color: var(--htd-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--htd-ease-out);
}

.htd-pcard:hover .htd-pcard__link {
  color: var(--htd-blue);
}

.htd-pcard:hover .htd-link-icon-wrap {
  background: var(--htd-blue);
  color: #FFFFFF;
  transform: translate(2px, -2px);
}

/* Empty State */
.htd-empty-state {
  margin: 30px 0;
  text-align: center;
}

.htd-empty-state .htd-bezel-core {
  padding: 48px 24px;
}

.htd-empty-state__icon {
  color: #94A3B8;
  margin-bottom: 14px;
}

.htd-empty-state h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--htd-navy);
  margin: 0 0 8px;
}

.htd-empty-state p {
  color: var(--htd-text-muted);
  font-size: 0.95rem;
  margin: 0 0 20px;
}

.htd-btn-reset-filter {
  background: var(--htd-blue);
  color: #FFFFFF;
  border: none;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 9999px;
  cursor: pointer;
  transition: background 0.2s;
}

.htd-btn-reset-filter:hover {
  background: var(--htd-blue-dark);
}

/* ==========================================================================
   4. SINGLE PROJECT CASE STUDY (PRESERVED PRECISELY)
   ========================================================================== */
.htd-single-proj-header {
  background: linear-gradient(135deg, #0B1120 0%, #0F172A 70%, #1E293B 100%);
  color: #FFFFFF;
  padding: 40px 0 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.htd-proj-breadcrumb {
  margin-bottom: 16px;
  font-size: 0.88rem;
  color: #94A3B8;
}

.htd-proj-breadcrumb a {
  color: #CBD5E1;
  text-decoration: none;
  transition: color 0.2s;
}

.htd-proj-breadcrumb a:hover {
  color: var(--htd-cyan);
}

.htd-proj-breadcrumb span.sep {
  margin: 0 8px;
  color: #64748B;
}

.htd-single-proj-header__top-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--htd-cyan);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}

.htd-single-proj-header__title {
  color: #FFFFFF !important;
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 16px;
}

.htd-single-proj-header__lead {
  color: #CBD5E1;
  font-size: 1.15rem;
  line-height: 1.7;
  max-width: 960px;
  margin: 0;
}

/* SPEC SHEET BOX */
.htd-proj-specs-card {
  background: #1E293B;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--htd-radius-lg);
  padding: 28px;
  margin-top: 36px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
}

.htd-proj-specs-card__heading {
  color: var(--htd-cyan);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 8px;
}

.htd-proj-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.htd-spec-item {
  display: flex;
  flex-direction: column;
}

.htd-spec-label {
  font-size: 0.78rem;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.htd-spec-val {
  font-size: 1rem;
  font-weight: 700;
  color: #F8FAFC;
  line-height: 1.35;
}

.htd-spec-val.highlight {
  color: var(--htd-cyan);
  font-family: var(--htd-font-mono);
  font-size: 1.45rem;
  font-weight: 800;
}

/* CHALLENGE & SOLUTION */
.htd-challenge-solution-wrap {
  padding: 60px 0 40px;
}

.htd-section-subtitle {
  font-size: 0.85rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--htd-blue);
  margin-bottom: 8px;
  display: block;
}

.htd-section-title-bar {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--htd-navy);
  margin: 0 0 30px;
}

.htd-challenge-card {
  background: #FFF5F5;
  border-left: 4px solid #DC2626;
  border-radius: var(--htd-radius-sm);
  padding: 24px 22px;
  height: 100%;
}

.htd-challenge-card h3 {
  color: #991B1B !important;
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.htd-challenge-card p {
  color: #450A0A;
  margin: 0;
  line-height: 1.6;
  font-size: 0.98rem;
}

.htd-solution-card {
  background: #F0F9FF;
  border-left: 4px solid var(--htd-blue);
  border-radius: var(--htd-radius-sm);
  padding: 24px 22px;
  height: 100%;
}

.htd-solution-card h3 {
  color: #0369A1 !important;
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.htd-solution-card p {
  color: #0C4A6E;
  margin: 0;
  line-height: 1.6;
  font-size: 0.98rem;
}

/* 3D TEKLA GALLERY */
.htd-gallery-wrap {
  padding: 20px 0 70px;
}

.htd-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 24px;
}

.htd-gallery-item {
  border-radius: var(--htd-radius-sm);
  overflow: hidden;
  border: 1px solid var(--htd-border);
  background: #0F172A;
  position: relative;
  box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

.htd-gallery-link {
  display: block;
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.htd-gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.htd-gallery-item:hover .htd-gallery-img {
  transform: scale(1.05);
}

.htd-gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.htd-gallery-item:hover .htd-gallery-overlay {
  opacity: 1;
}

.htd-gallery-overlay-icon {
  background: rgba(255, 255, 255, 0.9);
  color: var(--htd-navy);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.85);
  transition: transform 0.25s ease;
}

.htd-gallery-item:hover .htd-gallery-overlay-icon {
  transform: scale(1);
}

.htd-gallery-caption {
  padding: 10px 14px;
  background: #FFFFFF;
  border-top: 1px solid var(--htd-border);
  font-size: 0.82rem;
  color: var(--htd-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   5. CTA ENGINEERING COMMAND & CONVERSION CONSOLE
   ========================================================================== */
.htd-cta-engineering-box {
  margin: 50px 0 20px;
}

.htd-cta-engineering-box .htd-bezel-shell {
  background: #0B1120;
  border-color: rgba(255, 255, 255, 0.1);
  padding: 6px;
  box-shadow: 0 20px 45px -8px rgba(11, 17, 32, 0.4);
}

.htd-cta-engineering-box .htd-bezel-core {
  background: 
    radial-gradient(circle at 10% 20%, rgba(7, 116, 187, 0.25) 0%, transparent 45%),
    linear-gradient(135deg, #070B14 0%, #0F172A 60%, #1E293B 100%);
  border-color: rgba(255, 255, 255, 0.08);
  padding: 44px 40px;
  position: relative;
}

.htd-cta-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 40px;
  align-items: center;
}

.htd-cta-tag {
  font-family: var(--htd-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--htd-cyan);
  margin-bottom: 12px;
}

.htd-cta-content h2 {
  color: #FFFFFF !important;
  font-size: 1.85rem;
  font-weight: 800;
  margin: 0 0 12px;
  line-height: 1.3;
}

.htd-cta-content p {
  color: #94A3B8;
  font-size: 0.96rem;
  line-height: 1.6;
  margin: 0 0 28px;
  max-width: 600px;
}

.htd-cta-btn-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.htd-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: var(--htd-blue);
  color: #FFFFFF !important;
  font-size: 0.92rem;
  font-weight: 700;
  padding: 6px 6px 6px 20px;
  border-radius: 9999px;
  text-decoration: none;
  transition: all 0.3s var(--htd-ease-out);
  box-shadow: 0 4px 14px rgba(7, 116, 187, 0.35);
}

.htd-btn-primary:hover {
  background: #0984D1;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(7, 116, 187, 0.5);
}

.htd-btn-primary:hover .htd-btn-icon-wrap {
  background: #FFFFFF;
  color: var(--htd-blue);
  transform: translate(2px, -2px);
}

.htd-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #F8FAFC !important;
  font-size: 0.92rem;
  font-weight: 700;
  padding: 6px 6px 6px 20px;
  border-radius: 9999px;
  text-decoration: none;
  transition: all 0.3s var(--htd-ease-out);
}

.htd-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
}

.htd-btn-secondary:hover .htd-btn-icon-wrap {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.htd-btn-primary:active,
.htd-btn-secondary:active {
  transform: translateY(0) scale(0.98);
}

/* Direct Contact Console */
.htd-cta-direct__inner {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--htd-radius-lg);
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.htd-direct-header {
  font-size: 0.78rem;
  text-transform: uppercase;
  color: #94A3B8;
  letter-spacing: 0.08em;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 8px;
}

.htd-direct-contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  padding: 8px 10px;
  border-radius: var(--htd-radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.2s ease;
}

.htd-direct-contact-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(56, 189, 248, 0.3);
}

.htd-direct-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(7, 116, 187, 0.2);
  color: var(--htd-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.htd-direct-info {
  display: flex;
  flex-direction: column;
}

.htd-direct-label {
  font-size: 0.72rem;
  color: #94A3B8;
  letter-spacing: 0.02em;
}

.htd-direct-val {
  font-family: var(--htd-font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: #F8FAFC;
}

.htd-direct-sla {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #7DD3FC;
  font-size: 0.76rem;
  margin-top: 4px;
}

.htd-direct-sla svg {
  flex-shrink: 0;
  color: #38BDF8;
}

/* ==========================================================================
   6. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
  .htd-flagship-card {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .htd-flagship-card__media {
    aspect-ratio: 16 / 10;
  }
  .htd-projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
  }
  .htd-cta-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .htd-proj-specs-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .htd-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .htd-project-hero {
    padding: 44px 0 36px;
  }
  .htd-project-hero__title {
    font-size: 1.85rem;
  }
  .htd-project-hero__subtitle {
    font-size: 0.98rem;
    margin-bottom: 24px;
  }
  .htd-project-hero__metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .htd-hero-metric-item:nth-child(2)::after {
    display: none;
  }
  .htd-hero-metric-val {
    font-size: 1.45rem;
  }
  .htd-filter-container {
    padding: 0;
  }
  .htd-filter-tabs {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding: 4px 16px;
    gap: 8px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .htd-filter-tabs::-webkit-scrollbar {
    display: none;
  }
  .htd-projects-section {
    padding: 24px 0 60px;
  }
  .htd-flagship-card__content {
    padding: 22px 18px;
  }
  .htd-flagship-card__title {
    font-size: 1.4rem;
  }
  .htd-fspec-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .htd-fspec-label {
    width: auto;
  }
  .htd-projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .htd-cta-engineering-box .htd-bezel-core {
    padding: 30px 20px;
  }
  .htd-cta-content h2 {
    font-size: 1.55rem;
  }
  .htd-cta-btn-group {
    flex-direction: column;
    align-items: stretch;
  }
  .htd-btn-primary,
  .htd-btn-secondary {
    width: 100%;
  }
  .htd-single-proj-header__title {
    font-size: 1.75rem;
  }
  .htd-proj-specs-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .htd-gallery-grid {
    grid-template-columns: 1fr;
  }
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  .htd-telemetry-dot,
  .htd-pcard .htd-bezel-shell,
  .htd-pcard__img,
  .htd-flagship-card__img,
  .htd-viewfinder-corners .corner,
  .htd-btn-icon-wrap,
  .htd-link-icon-wrap {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}