/* ============================================
   FORGELINKS — AI Agents for Construction
   Light theme · Blue accents · Clean & uplifting
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-white:     #ffffff;
  --bg-light:     #f4f7fb;
  --bg-card:      #ffffff;
  --bg-surface:   #eaf0f8;
  --bg-navy:      #1b3a5c;
  --bg-navy-deep: #132d49;
  --text-primary:   #1a2b3d;
  --text-secondary: #5a6d80;
  --text-on-dark:   #ffffff;
  --text-on-dark-secondary: #b0c4d8;
  --accent:       #2563eb;
  --accent-light: #3b82f6;
  --accent-soft:  rgba(37, 99, 235, 0.08);
  --accent-hover: #1d4ed8;
  --success:      #10b981;
  --warning:      #f59e0b;
  --danger:       #ef4444;
  --border:       #dde4ee;
  --border-light: #e8edf5;
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:    0 10px 40px rgba(0,0,0,0.1);
  --radius:       12px;
  --transition:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--bg-white);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; display: block; }

/* --- Utility --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section   { padding: 100px 0; }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); margin-bottom: 20px; }
h3 { font-size: 1.4rem; margin-bottom: 12px; }
p  { color: var(--text-secondary); }

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 60px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.hero .btn-outline {
  color: #ffffff;
  border-color: rgba(255,255,255,0.3);
}
.hero .btn-outline:hover {
  border-color: #60a5fa;
  color: #60a5fa;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.navbar.scrolled {
  padding: 14px 0;
}
.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
}
.logo img {
  height: 72px;
  width: auto;
}

/* --- Video embed --- */
.demo-video {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.demo-video-wrapper {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.demo-video-wrapper video {
  width: 100%;
  display: block;
  border-radius: var(--radius);
}
.youtube-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.youtube-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: var(--radius);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
  align-items: center;
}
.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-links .btn-primary {
  color: #ffffff !important;
}
.nav-links .btn-primary::after {
  display: none;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--bg-navy-deep);
}
.hero-video-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(120, 90, 10, 0.45);
  z-index: 1;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  z-index: 2;
}

.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(96, 165, 250, 0.15);
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #93bbfd;
  margin-bottom: 28px;
}
.hero-badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 { margin-bottom: 24px; color: #ffffff; }
.hero h1 .line2 {
  display: block;
  font-size: 120%;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.2rem;
  margin-bottom: 40px;
  max-width: 560px;
  color: var(--text-on-dark-secondary);
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

/* --- Stats Bar --- */
.stats-bar {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-navy);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 40px 20px;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.stat-item:last-child { border-right: none; }
.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: #60a5fa;
  letter-spacing: -0.03em;
}
.stat-label {
  font-size: 0.9rem;
  color: var(--text-on-dark-secondary);
  margin-top: 4px;
}

/* --- Feature Cards --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 36px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #60a5fa);
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover {
  border-color: rgba(37, 99, 235, 0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 52px;
  height: 52px;
  background: var(--accent-soft);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.feature-card p {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Services / Product Section --- */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--border-light);
}
.service-block:last-child { border-bottom: none; }
.service-block.reverse { direction: rtl; }
.service-block.reverse > * { direction: ltr; }

.service-visual {
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.service-visual::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), transparent 50%);
  z-index: -1;
}

.terminal {
  background: var(--bg-navy-deep);
  border-radius: 8px;
  padding: 20px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
  color: #cbd5e1;
}
.terminal .prompt { color: #60a5fa; }
.terminal .comment { color: #64748b; }
.terminal .output { color: #6ee7b7; }
.terminal .file { color: #93c5fd; }

.service-info .tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent-soft);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.service-info h2 { margin-bottom: 16px; }
.service-info > p { margin-bottom: 24px; }

.checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.checklist li::before {
  content: '\2713';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* --- How It Works --- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border), var(--accent), var(--border), transparent);
}

.step {
  text-align: center;
  position: relative;
}
.step-number {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.step:hover .step-number {
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(37, 99, 235, 0.15);
}
.step h3 { font-size: 1.1rem; }
.step p { font-size: 0.9rem; }

/* --- CTA / Banner --- */
.cta-section {
  background: linear-gradient(135deg, var(--bg-navy), var(--bg-navy-deep));
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.1) 0%, transparent 70%);
  pointer-events: none;
}
.cta-section h2 { position: relative; color: var(--text-on-dark); }
.cta-section p {
  font-size: 1.1rem;
  margin-bottom: 36px;
  position: relative;
  color: var(--text-on-dark-secondary);
}
.cta-section .btn { position: relative; }
.cta-section .btn-primary {
  background: #60a5fa;
  color: var(--bg-navy-deep);
}
.cta-section .btn-primary:hover {
  background: #93bbfd;
  color: var(--bg-navy-deep);
  box-shadow: 0 8px 30px rgba(96, 165, 250, 0.3);
}

/* --- About Page --- */
.page-header {
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
  background: linear-gradient(165deg, var(--bg-white) 0%, var(--bg-light) 100%);
}
.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}
.page-header p {
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-text h2 { margin-bottom: 16px; }
.about-text p { margin-bottom: 16px; font-size: 1.05rem; }

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.value-card:hover {
  border-color: rgba(37, 99, 235, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.value-card .icon {
  font-size: 1.6rem;
  margin-bottom: 14px;
}
.value-card p { font-size: 0.9rem; }

/* --- Pipeline Visual --- */
.pipeline {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.pipeline-step {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.pipeline-arrow {
  color: var(--accent);
  font-size: 1rem;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form-group textarea { resize: vertical; min-height: 140px; }

/* --- Case Studies --- */
.case-study-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 48px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.case-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.2);
}
.case-card-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-soft);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  width: fit-content;
}
.case-card h3 { font-size: 1.25rem; margin-bottom: 12px; }
.case-card .case-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}
.case-card .case-summary {
  font-size: 0.95rem;
  flex: 1;
}
.case-card .case-metric {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}
.case-metric-item {
  text-align: center;
}
.case-metric-item .number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.case-metric-item .label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Case Study Detail */
.case-detail {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-light);
}
.case-detail:last-of-type { border-bottom: none; }

.case-header {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 48px;
}
.case-header-text { flex: 1; }
.case-header-text h2 { margin-bottom: 12px; }
.case-header-metrics {
  display: flex;
  gap: 20px;
  flex-shrink: 0;
}
.metric-box {
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 20px 28px;
  text-align: center;
  min-width: 130px;
}
.metric-box .number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.metric-box .label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

.case-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.case-block h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.case-block h3 .icon {
  font-size: 1.2rem;
}

.case-quote {
  background: var(--bg-light);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px 32px;
  margin-top: 40px;
}
.case-quote p {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.case-quote .attribution {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: normal;
}

.before-after {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
  margin-top: 16px;
}
.before-col, .after-col {
  border-radius: var(--radius);
  padding: 24px;
}
.before-col {
  background: #fef2f2;
  border: 1px solid #fecaca;
}
.before-col h4 { color: #dc2626; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
.after-col {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
}
.after-col h4 { color: #16a34a; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
.before-col li, .after-col li {
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--text-secondary);
}
.ba-arrow {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  color: var(--accent);
  font-weight: 700;
}

@media (max-width: 768px) {
  .case-study-cards { grid-template-columns: 1fr; }
  .case-header { flex-direction: column; }
  .case-header-metrics { flex-wrap: wrap; }
  .case-grid { grid-template-columns: 1fr; }
  .before-after { grid-template-columns: 1fr; }
  .ba-arrow { justify-content: center; transform: rotate(90deg); }
}

.contact-info-block {
  margin-bottom: 36px;
}
.contact-info-block h3 { margin-bottom: 8px; }
.contact-info-block p { font-size: 0.95rem; }

/* --- Premium / Enterprise Page --- */
.premium-hero {
  padding: 160px 0 100px;
  background: linear-gradient(165deg, var(--bg-navy-deep) 0%, var(--bg-navy) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.premium-hero::before {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  height: 900px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.premium-hero h1 {
  color: #ffffff;
  position: relative;
  z-index: 1;
}
.premium-hero h1 .line2 {
  display: block;
  font-size: 100%;
  background: linear-gradient(135deg, #60a5fa, #93bbfd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.premium-hero p {
  color: var(--text-on-dark-secondary);
  position: relative;
  z-index: 1;
  font-size: 1.15rem;
  max-width: 680px;
  margin: 0 auto;
}
.premium-hero .hero-values {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 40px;
  position: relative;
  z-index: 1;
}
.premium-hero .hero-value {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #93bbfd;
  font-weight: 600;
  font-size: 0.95rem;
}
.premium-hero .hero-value .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #60a5fa;
}

.pillar-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--border-light);
}
.pillar-section:last-child { border-bottom: none; }
.pillar-section.reverse { direction: rtl; }
.pillar-section.reverse > * { direction: ltr; }

.pillar-number {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  padding: 4px 14px;
  background: var(--accent-soft);
  border-radius: 50px;
}

.pillar-visual {
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.pillar-visual h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--accent);
}
.pillar-visual ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pillar-visual ul li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
}
.pillar-visual ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

.build-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.build-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.build-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.2);
}
.build-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.build-card p {
  font-size: 0.9rem;
}

.premium-cta {
  background: linear-gradient(135deg, var(--bg-navy), var(--bg-navy-deep));
  text-align: center;
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.premium-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.premium-cta h2 {
  color: #ffffff;
  position: relative;
}
.premium-cta p {
  color: var(--text-on-dark-secondary);
  font-size: 1.1rem;
  margin-bottom: 36px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}
.premium-cta .btn {
  position: relative;
}
.premium-cta .btn-primary {
  background: #60a5fa;
  color: var(--bg-navy-deep);
}
.premium-cta .btn-primary:hover {
  background: #93bbfd;
  box-shadow: 0 8px 30px rgba(96, 165, 250, 0.3);
}

/* --- Agent Architecture Diagrams --- */
.arch-diagrams {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}
.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.arch-diagram h4 {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.arch-diagram p {
  font-size: 0.8rem;
  margin-top: 16px;
  color: var(--text-secondary);
}

/* Diagram nodes */
.diagram-node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--accent);
  position: relative;
}
.diagram-node.supervisor {
  background: var(--bg-navy);
  width: 64px;
  height: 64px;
  font-size: 0.72rem;
}
.diagram-node.small {
  width: 44px;
  height: 44px;
  font-size: 0.65rem;
  background: var(--accent-light);
}

/* Hierarchical */
.hier-top { display: flex; justify-content: center; margin-bottom: 8px; }
.hier-arrow {
  display: flex;
  justify-content: center;
  color: var(--accent);
  font-size: 0.9rem;
  margin: 4px 0;
  gap: 60px;
}
.hier-mid { display: flex; justify-content: center; gap: 16px; margin-bottom: 8px; }
.hier-bot { display: flex; justify-content: center; gap: 10px; }

/* Mesh */
.mesh-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 180px;
  margin: 0 auto;
  position: relative;
}
.mesh-grid::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 80%;
  border: 2px dashed rgba(37, 99, 235, 0.2);
  border-radius: 50%;
}
.mesh-grid .diagram-node {
  width: 48px;
  height: 48px;
  margin: 0 auto;
  z-index: 1;
}
.mesh-center {
  display: flex;
  justify-content: center;
}
.mesh-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Sequential */
.seq-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}
.seq-arrow {
  color: var(--accent);
  font-size: 1rem;
  font-weight: 700;
}

/* --- Memory Structure Diagram --- */
.memory-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.memory-layers {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.memory-layer {
  display: flex;
  align-items: stretch;
  gap: 12px;
}
.memory-layer-label {
  width: 120px;
  flex-shrink: 0;
  background: var(--bg-navy);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 12px 14px;
  border-radius: 8px;
  display: flex;
  align-items: center;
}
.memory-layer-items {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
}
.memory-item {
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}
.memory-item.active {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}
.memory-connector {
  display: flex;
  justify-content: center;
  padding: 4px 0;
}
.memory-connector-line {
  width: 2px;
  height: 16px;
  background: linear-gradient(180deg, var(--accent), rgba(37, 99, 235, 0.2));
}
.memory-arrows {
  display: flex;
  justify-content: space-around;
  padding: 8px 0;
}
.memory-arrow-down {
  color: var(--accent);
  font-size: 0.9rem;
  text-align: center;
}
.memory-engine {
  background: linear-gradient(135deg, var(--bg-navy), var(--bg-navy-deep));
  border-radius: 10px;
  padding: 16px;
  text-align: center;
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.memory-outputs {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.memory-output {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .premium-hero .hero-values {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }
  .pillar-section,
  .pillar-section.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 32px;
  }
  .build-grid { grid-template-columns: 1fr; }
  .arch-diagrams { grid-template-columns: 1fr; }
  .memory-layer { flex-direction: column; }
  .memory-layer-label { width: 100%; }
}

/* --- Footer --- */
.footer {
  background: var(--bg-navy-deep);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 280px;
  color: var(--text-on-dark-secondary);
}
.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-on-dark-secondary);
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  color: var(--text-on-dark-secondary);
  font-size: 0.9rem;
}
.footer-col a:hover { color: #60a5fa; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.85rem;
  color: var(--text-on-dark-secondary);
}

/* --- Alt section backgrounds --- */
/* Sections using style="background: var(--bg-card);" in HTML now get light blue */

/* --- Responsive --- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.3rem; }
  .hamburger { display: flex; }

  .hero { min-height: auto; padding: 140px 0 80px; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { text-align: center; justify-content: center; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); }

  .features-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; gap: 24px; }

  .service-block,
  .service-block.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: 32px;
  }

  .about-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }

  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { border-right: none; }
}