/*
 * Tracelio Landing Page - Industrial Premium Theme
 * Dark theme with cyan accents, conveying precision and innovation
 */

/* === FONTS === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* === CSS VARIABLES === */
:root {
  /* Colors - Tracelio Brand */
  --color-bg-primary: #0F172A;
  --color-bg-secondary: #1E293B;
  --color-bg-tertiary: #334155;
  --color-bg-card: #1E293B;

  --color-accent: #06B6D4;
  --color-accent-light: #22D3EE;
  --color-accent-dark: #0891B2;
  --color-accent-glow: rgba(6, 182, 212, 0.15);

  --color-text-primary: #F8FAFC;
  --color-text-secondary: #94A3B8;
  --color-text-muted: #64748B;

  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  --color-info: #8B5CF6;

  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(6, 182, 212, 0.3);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--color-accent-glow);

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

/* === RESET === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

/* === UTILITIES === */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}


.fade-in {
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }
.delay-7 { animation-delay: 0.7s; }

/* === HEADER / NAVIGATION === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-sm) 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-normal);
}

.header.scrolled {
  padding: var(--space-xs) 0;
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.logo-icon svg {
  width: 100%;
  height: 100%;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link-ai {
  color: var(--color-accent);
  background: var(--color-accent-glow);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(6, 182, 212, 0.3);
  font-size: 0.85rem;
}

.nav-link-ai::after {
  display: none;
}

.nav-link-ai:hover {
  color: var(--color-bg-primary);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.lang-switch:hover {
  border-color: var(--color-border-hover);
}

.lang-switch a {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.lang-switch a.active,
.lang-switch a:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-card);
}

/* === MOBILE MENU === */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.menu-toggle:hover {
  color: var(--color-text-primary);
}

.menu-toggle svg {
  display: block;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: var(--color-bg-primary);
  box-shadow: var(--shadow-md), 0 0 30px var(--color-accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 50px var(--color-accent-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-glow);
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -25%;
  width: 80%;
  height: 150%;
  background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent-glow);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--color-accent-light);
  margin-bottom: var(--space-md);
  font-family: var(--font-mono);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 480px;
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
}

.hero-mockup {
  width: 100%;
  max-width: 600px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* === STATS BAR === */
.stats-bar {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.stat-item {
  padding: var(--space-sm);
}

.stat-number {
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-mono);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

/* === SECTION STYLES === */
.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
}

.section-overline {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  font-family: var(--font-mono);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
}

/* === BENEFITS / FEATURES SECTION === */
.benefits {
  background: var(--color-bg-secondary);
}

/* === FEATURES GRID === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}

.feature-item:hover {
  border-color: var(--color-border-hover);
}

.feature-item.feature-highlight {
  border-color: rgba(6, 182, 212, 0.2);
  background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(6, 182, 212, 0.05) 100%);
}

.feature-item.feature-highlight:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.feature-highlight .feature-icon {
  background: var(--color-accent-glow);
}

.feature-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.feature-content p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.feature-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--color-accent-glow);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-left: var(--space-xs);
  vertical-align: middle;
}

/* === TRACEABILITY HIGHLIGHT SECTION === */
.traceability {
  background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.traceability::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.trace-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.trace-text h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.trace-text p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.trace-features {
  list-style: none;
  display: grid;
  gap: var(--space-sm);
}

.trace-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.trace-features li .trace-check {
  width: 24px;
  height: 24px;
  background: var(--color-accent-glow);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.trace-visual {
  position: relative;
}

.trace-diagram {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 2;
}

.trace-diagram .highlight {
  color: var(--color-accent);
  font-weight: 500;
}

.trace-diagram .muted {
  color: var(--color-text-muted);
}

.trace-diagram .success {
  color: var(--color-success);
}

/* === DEPLOYMENT / WORKS EVERYWHERE === */
.deployment {
  background: var(--color-bg-secondary);
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.device-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: var(--transition-normal);
}

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

.device-card .device-icon {
  width: 64px;
  height: 64px;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin: 0 auto var(--space-md);
}

.device-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.device-card p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.deployment-note {
  text-align: center;
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent-glow);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-md);
}

/* === HOW IT WORKS === */
.how-it-works {
  background: var(--color-bg-primary);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.step-card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: var(--color-bg-primary);
  border-radius: var(--radius-full);
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-mono);
  margin-bottom: var(--space-md);
}

.step-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.step-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: var(--transition-normal);
}

.pricing-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-glow);
}

.pricing-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin: 0 auto var(--space-md);
}

.pricing-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.pricing-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* === AI ASSISTANT SECTION === */
.ai-assistant {
  background: var(--color-bg-primary);
}

.assistant-container {
  max-width: 760px;
  margin: 0 auto;
}

.assistant-input-area {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: var(--transition-normal);
}

.assistant-input-area:focus-within {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-glow);
}

.assistant-textarea {
  width: 100%;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text-primary);
  resize: vertical;
  min-height: 100px;
  max-height: 200px;
  line-height: 1.6;
  transition: var(--transition-fast);
}

.assistant-textarea::placeholder {
  color: var(--color-text-muted);
}

.assistant-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.assistant-input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-md);
}

.assistant-char-count {
  font-size: 0.825rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.assistant-btn {
  padding: var(--space-sm) var(--space-xl);
  font-size: 0.95rem;
}

.assistant-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.assistant-btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

.assistant-response {
  margin-top: var(--space-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.assistant-response-header {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.assistant-response-label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.assistant-output {
  padding: var(--space-lg);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.assistant-output p {
  margin-bottom: var(--space-sm);
}

.assistant-output ul,
.assistant-output ol {
  margin: var(--space-sm) 0;
  padding-left: var(--space-lg);
}

.assistant-output li {
  margin-bottom: var(--space-xs);
}

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

.assistant-cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--color-accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: pulse 1s ease-in-out infinite;
}

.assistant-loading {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.assistant-loading-dots {
  display: inline-flex;
  gap: 4px;
}

.assistant-loading-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: dotPulse 1.4s ease-in-out infinite;
}

.assistant-loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.assistant-loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes dotPulse {
  0%, 80%, 100% {
    opacity: 0.2;
    transform: scale(0.8);
  }
  40% {
    opacity: 1;
    transform: scale(1);
  }
}

.assistant-error {
  margin-top: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  color: var(--color-danger);
  font-size: 0.9rem;
}

.assistant-disclaimer {
  margin-top: var(--space-md);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* === CTA SECTION === */
.cta {
  background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta-inline {
  text-align: center;
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta-inline .container {
  max-width: 600px;
}

.cta-inline p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--space-lg);
}

.cta-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.cta-description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

/* === FOOTER === */
.footer {
  background: var(--color-bg-secondary);
  padding: var(--space-2xl) 0 var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  margin-bottom: var(--space-md);
}

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

.footer-column h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--space-xs);
}

.footer-column a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-column a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.social-link:hover {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-subtitle {
    max-width: 100%;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

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

  .trace-content {
    grid-template-columns: 1fr;
  }

  .trace-visual {
    order: -1;
  }

  .device-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-xl);
  }

  .steps-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-2xl);
  }

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

  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-lg);
    gap: 0;
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-links .nav-link {
    display: block;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 1.1rem;
  }

  .nav-links li:last-child .nav-link {
    border-bottom: none;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand {
    max-width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--space-sm);
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

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