/* ==========================================================================
   Otalkie IOA — Official Landing Page Stylesheet
   Domain: https://ioa.otalkie.com
   ========================================================================== */

:root {
  --bg-primary: #07090e;
  --bg-secondary: #0d121f;
  --bg-card: rgba(18, 25, 41, 0.75);
  --bg-card-hover: rgba(26, 36, 60, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 240, 255, 0.3);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #00f0ff;
  --accent-blue: #2979ff;
  --accent-purple: #8b5cf6;
  --accent-emerald: #00e676;
  --accent-amber: #f59e0b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(41, 121, 255, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(0, 240, 255, 0.06) 0%, transparent 45%);
  background-attachment: fixed;
  touch-action: manipulation;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 76px;
  padding-top: env(safe-area-inset-top, 0);
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.mobile-only-action {
  display: none !important;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  color: #000;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
}

.brand-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.7rem;
  background: rgba(0, 240, 255, 0.12);
  color: var(--accent-cyan);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 240, 255, 0.25);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  min-height: 32px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  touch-action: manipulation;
}

.lang-btn.active {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #000;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  min-height: 44px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: none;
  touch-action: manipulation;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #000;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-outline-cyan {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.4);
}

.btn-outline-cyan:hover {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* Hamburger for Mobile */
.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  min-width: 44px;
  min-height: 44px;
  cursor: pointer;
  touch-action: manipulation;
  align-items: center;
  justify-content: center;
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(180deg, #ffffff 30%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  max-width: 800px;
  margin: 0 auto 36px;
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hero-punchline-container {
  margin: 20px auto 28px;
  max-width: 860px;
}

.hero-punchline-main {
  font-size: 1.45rem;
  font-weight: 800;
  color: #f8fafc;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.hero-punchline-sub {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-top: 8px;
}

/* Golden Triad Infrastructure Banner */
.golden-triad-wrapper {
  margin: 36px auto 44px;
  max-width: 980px;
  background: rgba(13, 18, 31, 0.75);
  border: 1px solid rgba(0, 240, 255, 0.22);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.45);
}

.triad-header-label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
  margin-bottom: 20px;
  text-align: center;
}

.triad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  text-align: left;
}

.triad-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.triad-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.22);
}

.triad-card.triad-highlight {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.09), rgba(41, 121, 255, 0.14));
  border: 1px solid rgba(0, 240, 255, 0.45);
  box-shadow: 0 0 26px rgba(0, 240, 255, 0.16);
}

.triad-badge {
  align-self: flex-start;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  margin-bottom: 10px;
}

.triad-badge-glow {
  background: rgba(0, 240, 255, 0.2);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.4);
}

.triad-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
}

.triad-role {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin: 4px 0 8px;
}

.triad-card.triad-highlight .triad-role {
  color: #38bdf8;
}

.triad-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .triad-grid {
    grid-template-columns: 1fr;
  }
  .hero-punchline-main {
    font-size: 1.15rem;
  }
  .hero-punchline-sub {
    font-size: 0.95rem;
  }
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

/* Hero Metrics Bar */
.metrics-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  padding: 24px;
  border-radius: var(--radius-md);
  text-align: left;
  transition: var(--transition);
}

.metric-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.metric-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  max-width: 680px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* Problem vs Solution */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 100px;
}

.problem-card, .solution-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.problem-card {
  border-top: 4px solid #ef4444;
}

.solution-card {
  border-top: 4px solid var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.card-heading {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.comparison-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.comparison-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.comparison-list li strong {
  color: var(--text-primary);
}

.comparison-list .icon {
  font-size: 1.2rem;
  line-height: 1.4;
}

/* Two-Tier Flywheel Section */
.flywheel-section {
  padding: 100px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(13, 18, 31, 0.6) 50%, transparent 100%);
}

.flywheel-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.flywheel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
  position: relative;
}

.flywheel-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.flywheel-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.badge-tier1 {
  background: rgba(0, 230, 118, 0.12);
  color: var(--accent-emerald);
  border: 1px solid rgba(0, 230, 118, 0.3);
}

.badge-tier2 {
  background: rgba(41, 121, 255, 0.12);
  color: var(--accent-blue);
  border: 1px solid rgba(41, 121, 255, 0.3);
}

.flywheel-title {
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.flywheel-sub {
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 16px;
  font-size: 1rem;
}

.flywheel-text {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Interactive Interactive Use-Cases Tabs */
.usecase-box {
  background: rgba(7, 9, 14, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.usecase-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 12px;
}

.usecase-tab {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.usecase-tab.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-cyan);
}

.usecase-content {
  display: none;
}

.usecase-content.active {
  display: block;
}

.prompt-bubble {
  background: rgba(0, 240, 255, 0.05);
  border-left: 3px solid var(--accent-cyan);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 16px;
  font-style: italic;
  color: #e2e8f0;
}

.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.step-num {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

/* Revenue Split Bar */
.rev-split-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.rev-split-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.rev-split-segments {
  display: flex;
  gap: 16px;
  flex-grow: 1;
  max-width: 650px;
}

.rev-segment {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  text-align: center;
}

.rev-val {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
}

.rev-val.user { color: var(--accent-emerald); }
.rev-val.carrier { color: var(--accent-blue); }
.rev-val.platform { color: var(--accent-cyan); }

.rev-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  margin-top: 2px;
}

/* Conceptual Network Architecture Framework */
.architecture-section {
  padding: 90px 0;
}

.arch-flow-selector {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin: 0 auto 36px auto;
  max-width: 620px;
}

.arch-flow-tab {
  flex: 1;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  background: rgba(18, 25, 41, 0.7);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.arch-flow-tab:hover {
  background: rgba(26, 36, 60, 0.9);
  color: var(--text-primary);
  border-color: rgba(0, 240, 255, 0.3);
}

.arch-flow-tab.active {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
}

.arch-flow-tab[data-target="flow-b2c"].active {
  background: rgba(0, 230, 118, 0.12);
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
  box-shadow: 0 0 20px rgba(0, 230, 118, 0.25);
}

/* Architecture Topology Visual Card */
.arch-topology-card {
  max-width: 1040px;
  margin: 0 auto 40px auto;
  background: rgba(13, 18, 31, 0.85);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 240, 255, 0.12);
  transition: var(--transition);
}

.arch-topology-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
}

.arch-topology-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.arch-topology-title {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.arch-topology-legend {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.legend-color-dot.cyan {
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

.legend-color-dot.emerald {
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

.arch-svg-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
  background: #070a12;
  padding: 16px 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.arch-svg-graphic {
  width: 100%;
  height: auto;
  min-width: 760px;
  display: block;
}

/* Dynamic Highlighting on Diagram */
.arch-topology-card.show-c2c .c2c-branch {
  opacity: 1;
  filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.35));
  transition: var(--transition);
}
.arch-topology-card.show-c2c .b2c-branch {
  opacity: 0.38;
  transition: var(--transition);
}

.arch-topology-card.show-b2c .b2c-branch {
  opacity: 1;
  filter: drop-shadow(0 0 10px rgba(0, 230, 118, 0.35));
  transition: var(--transition);
}
.arch-topology-card.show-b2c .c2c-branch {
  opacity: 0.38;
  transition: var(--transition);
}

/* Traveling Dash Animations */
@keyframes flowDash {
  to {
    stroke-dashoffset: -32;
  }
}

.flow-bus-line {
  animation: flowDash 1.2s linear infinite;
}

.flow-return-arrow {
  animation: flowDash 1.6s linear infinite reverse;
}

.arch-diagram-wrapper {
  max-width: 960px;
  margin: 0 auto 36px auto;
  display: flex;
  flex-direction: column;
}

.arch-tier-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.arch-tier-card[data-tier="1"] {
  border-top: 3px solid var(--accent-cyan);
}
.arch-tier-card[data-tier="2"] {
  border-top: 3px solid var(--accent-blue);
}
.arch-tier-card[data-tier="3"] {
  border-top: 3px solid var(--accent-purple);
}
.arch-tier-card[data-tier="4"] {
  border-top: 3px solid var(--accent-emerald);
}

.arch-tier-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-glow);
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.12);
}

@keyframes tierPulseGlow {
  0% { box-shadow: 0 0 0 rgba(0, 240, 255, 0); }
  50% { box-shadow: 0 0 28px rgba(0, 240, 255, 0.4); border-color: var(--accent-cyan); }
  100% { box-shadow: 0 0 0 rgba(0, 240, 255, 0); }
}

.arch-tier-card.flow-pulse {
  animation: tierPulseGlow 0.8s ease-in-out;
}

.arch-tier-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.arch-tier-badge-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.arch-tier-badge {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 240, 255, 0.25);
}

.arch-tier-card[data-tier="2"] .arch-tier-badge {
  color: var(--accent-blue);
  background: rgba(41, 121, 255, 0.1);
  border-color: rgba(41, 121, 255, 0.25);
}
.arch-tier-card[data-tier="3"] .arch-tier-badge {
  color: var(--accent-purple);
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.25);
}
.arch-tier-card[data-tier="4"] .arch-tier-badge {
  color: var(--accent-emerald);
  background: rgba(0, 230, 118, 0.1);
  border-color: rgba(0, 230, 118, 0.25);
}

.arch-protocol-chip {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.arch-tier-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.arch-tier-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.arch-tier-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.arch-tier-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.arch-pill {
  font-size: 0.76rem;
  font-family: var(--font-mono);
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.04);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Connectors between tiers */
.arch-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  padding: 6px 0;
  z-index: 2;
}

.arch-connector-line {
  width: 2px;
  height: 14px;
  background: linear-gradient(to bottom, rgba(0, 240, 255, 0.5), rgba(41, 121, 255, 0.5));
}

.arch-connector-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(13, 18, 31, 0.95);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 240, 255, 0.3);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.15);
  margin: 3px 0;
}

.pulse-dot-sm {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse 2s infinite;
}

.arch-connector-arrow {
  font-size: 0.72rem;
  color: var(--accent-cyan);
  margin-top: -2px;
}

/* Architecture Flow Scenario Panels */
.arch-flow-panels {
  max-width: 960px;
  margin: 0 auto 30px auto;
}

.arch-flow-panel {
  display: none;
}

.arch-flow-panel.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

.flow-scenario-card {
  background: rgba(18, 25, 41, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 26px;
}

.flow-scenario-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.flow-mode-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.flow-mode-badge.c2c {
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

.flow-mode-badge.b2c {
  background: rgba(0, 230, 118, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(0, 230, 118, 0.3);
}

.flow-scenario-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.flow-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.flow-step-item {
  background: rgba(13, 18, 31, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.flow-step-num {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow-step-content {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.flow-step-content em {
  color: var(--text-primary);
  font-style: normal;
}

.arch-disclaimer-box {
  max-width: 960px;
  margin: 0 auto;
  background: rgba(13, 18, 31, 0.5);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
  text-align: center;
}

/* Telecom Defensibility Moat (Secrecy Protected) */
.moat-section {
  padding: 100px 0;
}

.secrecy-banner {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.secrecy-icon {
  font-size: 1.8rem;
}

.secrecy-text {
  font-size: 0.95rem;
  color: #fde68a;
  flex-grow: 1;
}

.secrecy-btn {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.4);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.secrecy-btn:hover {
  background: rgba(245, 158, 11, 0.3);
  transform: translateY(-2px);
}

.moat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.moat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: var(--transition);
}

.moat-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}

.moat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.moat-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.moat-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.secrecy-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Seed Capital & Roadmap */
.seed-section {
  padding: 100px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(13, 18, 31, 0.6) 50%, transparent 100%);
}

.seed-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.seed-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
}

.seed-val {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-emerald);
  font-family: var(--font-mono);
  margin-bottom: 6px;
}

.roadmap-timeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
  margin-top: 40px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  align-items: center;
  transition: var(--transition);
}

.timeline-item:hover {
  border-color: var(--border-glow);
  transform: translateX(6px);
}

.timeline-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-cyan);
  font-size: 1.1rem;
}

.timeline-content h4 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Founding Team Recruitment (Inception Team) */
.team-section {
  padding: 100px 0;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.role-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.role-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.role-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.role-title {
  font-size: 1.35rem;
  font-weight: 700;
}

.role-equity {
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(0, 230, 118, 0.12);
  color: var(--accent-emerald);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 230, 118, 0.3);
}

.role-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.role-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.role-tag {
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

/* Modal Styling */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: max(20px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

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

.modal-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  max-width: 560px;
  width: 100%;
  padding: 36px;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  animation: modalIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 90dvh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

@keyframes modalIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.modal-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.5;
}

.nda-file-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: rgba(0, 240, 255, 0.05);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
  text-align: left;
}

.nda-file-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.nda-file-icon {
  font-size: 26px;
  line-height: 1;
  flex-shrink: 0;
}

.nda-file-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 2px;
}

.nda-file-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

.nda-file-desc strong {
  color: var(--text-primary);
}

.btn-download-nda {
  flex-shrink: 0;
  padding: 8px 14px;
  font-size: 0.85rem;
  min-height: 38px;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .nda-file-card {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .btn-download-nda {
    width: 100%;
  }
}

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

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  background: rgba(7, 9, 14, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 16px; /* Must be 16px to prevent iOS auto-zoom on focus */
  -webkit-appearance: none;
  appearance: none;
  transition: var(--transition);
  touch-action: manipulation;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 calc(40px + env(safe-area-inset-bottom, 0));
  background: var(--bg-primary);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 30px;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-domain {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  font-size: 0.9rem;
}

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 20px;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .hero-title { font-size: 2.8rem; }
  .metrics-bar { grid-template-columns: repeat(2, 1fr); }
  .moat-grid { grid-template-columns: 1fr; }
  .flywheel-container { grid-template-columns: 1fr; }
  .problem-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero {
    padding: calc(90px + env(safe-area-inset-top, 0)) 0 50px;
  }
  .hero-title {
    font-size: clamp(2rem, 7vw, 2.4rem);
    letter-spacing: -0.02em;
  }
  .hero-desc {
    font-size: 1rem;
    line-height: 1.6;
    padding: 0 8px;
  }

  /* Compact 2x2 metrics grid on mobile */
  .metrics-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .metric-card {
    padding: 16px 14px;
  }
  .metric-num {
    font-size: 1.6rem;
  }
  .metric-label {
    font-size: 0.78rem;
  }

  /* Mobile Navbar & Drawer */
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-actions .btn-nda-trigger { display: none; }
  .mobile-only-action {
    display: block;
    width: 100%;
    margin-top: 6px;
  }

  .nav-links.mobile-active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: calc(76px + env(safe-area-inset-top, 0));
    left: 0;
    right: 0;
    max-height: calc(100dvh - 76px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: rgba(13, 18, 31, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 24px calc(24px + env(safe-area-inset-bottom, 0));
    border-bottom: 1px solid var(--border-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    gap: 14px;
    z-index: 999;
  }

  .nav-links.mobile-active .nav-link {
    font-size: 1.05rem;
    padding: 10px 0;
    display: block;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  /* Use cases tabs vertical on mobile */
  .usecase-tabs {
    flex-direction: column;
    border-bottom: none;
    padding-bottom: 0;
    gap: 6px;
  }
  .usecase-tab {
    width: 100%;
    text-align: center;
    padding: 8px 12px;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
  }
  .usecase-tab.active {
    background: rgba(0, 240, 255, 0.12);
    border-color: rgba(0, 240, 255, 0.4);
  }

  /* Secrecy Banner */
  .secrecy-banner {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
    gap: 14px;
  }
  .secrecy-btn {
    width: 100%;
    text-align: center;
  }

  /* Flywheel & Cards */
  .flywheel-card, .problem-card, .solution-card, .role-card {
    padding: 24px 20px;
  }
  .role-header {
    flex-wrap: wrap;
    gap: 8px;
  }

  /* Timeline & Seed stats */
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 18px;
  }
  .seed-stats {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .seed-stat-card {
    padding: 20px 16px;
  }
  .seed-val {
    font-size: 2rem;
  }

  /* Revenue split box */
  .rev-split-box {
    flex-direction: column;
    align-items: flex-start;
  }
  .rev-split-segments {
    width: 100%;
    gap: 8px;
  }
  .rev-segment {
    padding: 10px 4px;
  }
  .rev-val {
    font-size: 1.25rem;
  }
  .rev-label {
    font-size: 0.68rem;
  }

  /* Modals on Mobile */
  .modal-backdrop {
    align-items: flex-start;
    padding-top: max(30px, env(safe-area-inset-top));
  }
  .modal-box {
    padding: 24px 18px;
    border-radius: var(--radius-md);
    max-height: calc(100dvh - 50px);
  }
  .modal-title {
    font-size: 1.35rem;
  }
  .modal-desc {
    font-size: 0.88rem;
    margin-bottom: 18px;
  }

  /* Architecture Section on Tablet/Mobile */
  .architecture-section {
    padding: 60px 0;
  }
  .arch-tier-card {
    padding: 20px 18px;
  }
  .arch-tier-title {
    font-size: 1.15rem;
  }
  .arch-tier-desc {
    font-size: 0.88rem;
  }
  .flow-steps-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .arch-connector-badge {
    font-size: 0.7rem;
    padding: 4px 10px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero-tag {
    font-size: 0.75rem;
    padding: 5px 12px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .metrics-bar {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .metric-card {
    padding: 12px 10px;
  }
  .metric-num {
    font-size: 1.35rem;
  }
  .metric-label {
    font-size: 0.7rem;
  }
  .brand-text {
    font-size: 1.05rem;
  }
  .brand-badge {
    font-size: 0.62rem;
    padding: 1px 6px;
  }
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }

  /* Architecture Diagram on Mobile Screens */
  .arch-flow-selector {
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }
  .arch-flow-tab {
    width: 100%;
    font-size: 0.85rem;
    padding: 10px 14px;
  }
  .arch-tier-card {
    padding: 16px 14px;
  }
  .arch-tier-title {
    font-size: 1.05rem;
  }
  .arch-tier-badge {
    font-size: 0.7rem;
    padding: 3px 8px;
  }
  .arch-connector-badge {
    font-size: 0.65rem;
    padding: 3px 8px;
  }
  .flow-scenario-card {
    padding: 16px 12px;
  }
  .flow-scenario-title {
    font-size: 0.95rem;
  }
}