/* ============================================================
   TelsonBase Landing Page — Styles
   Zero-Trust AI Agent Security Platform
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  --bg-primary: #0d0d1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: #1a1a2e;
  --bg-card-hover: #1f1f3a;
  --accent: #00BFA5;
  --accent-dim: rgba(0, 191, 165, 0.15);
  --accent-glow: rgba(0, 191, 165, 0.3);
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6a6a80;
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(0, 191, 165, 0.25);
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Consolas', monospace;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.4);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a:hover {
  opacity: 0.85;
}

img {
  max-width: 100%;
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.7;
}

.section-header {
  margin-bottom: 56px;
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(13, 13, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background var(--transition);
}

.nav.scrolled {
  background: rgba(13, 13, 26, 0.95);
  border-bottom-color: var(--border-accent);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.nav-brand span {
  color: var(--accent);
}

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

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  opacity: 1;
}

.nav-version {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 8px;
  border: 1px solid var(--border-accent);
  border-radius: 4px;
  color: var(--accent);
  background: var(--accent-dim);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.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 Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(0, 191, 165, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 70% 80%, rgba(0, 100, 180, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 0 24px;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

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

.hero-architect strong {
  color: var(--text-secondary);
  font-weight: 600;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--border-accent);
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  background: var(--accent-dim);
}

.version-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: float 2.5s ease-in-out infinite;
}

.scroll-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Carousel Section --- */
.carousel-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.carousel {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
  min-width: 100%;
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.slide-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.slide-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.slide-text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 560px;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 8px;
  padding-bottom: 8px;
}

.carousel-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-primary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1rem;
}

.carousel-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.carousel-dot.active {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* --- Why It Matters --- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.why-card {
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.why-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.why-card-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}

.why-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.why-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Architecture Diagram --- */
.arch-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.arch-diagram {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
}

.arch-layer {
  display: flex;
  align-items: stretch;
  gap: 0;
  position: relative;
}

.arch-label {
  width: 160px;
  flex-shrink: 0;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 2px solid var(--accent);
  position: relative;
}

.arch-label-name {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.arch-label-type {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.arch-content {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  flex-wrap: wrap;
}

.arch-node {
  padding: 10px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  white-space: nowrap;
  transition: all var(--transition);
}

.arch-node:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-dim);
}

.arch-node small {
  display: block;
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 2px;
  font-family: var(--font-stack);
}

.arch-connector {
  text-align: center;
  padding: 6px 0;
  color: var(--text-muted);
  font-size: 0.8rem;
  position: relative;
}

.arch-connector::before {
  content: '';
  display: block;
  width: 1px;
  height: 16px;
  background: var(--accent);
  margin: 0 auto;
  opacity: 0.4;
}

.arch-security-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 8px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 3px;
  display: inline-block;
}

/* Layer backgrounds */
.arch-layer:nth-child(odd) {
  background: rgba(255, 255, 255, 0.015);
}

.arch-layer:nth-child(even) {
  background: transparent;
}

/* --- Counters / By The Numbers --- */
.counters-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.counter-card {
  padding: 32px 20px;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.counter-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.counter-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 8px;
}

.counter-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* --- Compliance Grid --- */
.compliance-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.compliance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.compliance-card {
  padding: 24px 20px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.compliance-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card);
}

.compliance-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.compliance-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.compliance-card-status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  padding: 2px 6px;
  background: var(--accent-dim);
  border-radius: 3px;
  margin-top: 10px;
  letter-spacing: 0.05em;
}

/* --- Tech Stack --- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stack-card {
  padding: 28px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: all var(--transition);
}

.stack-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.stack-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.stack-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.stack-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Differentiators --- */
.diff-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.diff-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  list-style: none;
  max-width: 960px;
}

.diff-list li {
  padding: 20px 24px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: all var(--transition);
  position: relative;
  padding-left: 44px;
}

.diff-list li::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 24px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  transform: rotate(45deg);
}

.diff-list li:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.diff-list li strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* --- Footer --- */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-brand {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-brand strong {
  color: var(--text-primary);
  font-weight: 600;
}

.footer-contact {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.footer-location {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .counters-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 13, 26, 0.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 40px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1.1rem;
  }

  .hamburger {
    display: flex;
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .counters-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .counter-value {
    font-size: 2rem;
  }

  .stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .diff-list {
    grid-template-columns: 1fr;
  }

  .compliance-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Architecture diagram mobile */
  .arch-layer {
    flex-direction: column;
  }

  .arch-label {
    width: 100%;
    border-right: none;
    border-bottom: 2px solid var(--accent);
    padding: 12px 16px;
  }

  .arch-content {
    padding: 12px 16px;
  }

  .carousel-slide {
    padding: 32px 20px;
  }

  .slide-title {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .counters-grid {
    grid-template-columns: 1fr 1fr;
  }

  .compliance-grid {
    grid-template-columns: 1fr;
  }

  .stack-grid {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }
}