/* ============================================================================
   AUTONMON.COM — Dark Theme
   ============================================================================ */

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #141414;
  --bg-card-hover: #1a1a1a;
  --accent: #00c3a5;
  --accent-dim: rgba(0, 195, 165, 0.12);
  --accent-glow: rgba(0, 195, 165, 0.25);
  --text-primary: #e8e8e8;
  --text-secondary: #999999;
  --text-muted: #666666;
  --border: #222222;
  --border-light: #2a2a2a;
  --danger: #ff4444;
  --font-display: 'IBM Plex Sans', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

/* ── Reset & Base ── */

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--accent);
  color: #000;
}

/* ── Navigation ── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.nav.scrolled {
  border-bottom-color: var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-logo .logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s;
  text-transform: uppercase;
}

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

.nav-cta {
  font-size: 0.8rem !important;
  font-weight: 600 !important;
  color: #000 !important;
  background: var(--accent);
  padding: 0.5rem 1.25rem;
  border-radius: 4px;
  transition: opacity 0.2s !important;
}

.nav-cta:hover {
  opacity: 0.85;
  color: #000 !important;
}

/* ── Section Layout ── */

.section {
  padding: 8rem 3rem;
  max-width: 1280px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.section-heading {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.section-subheading {
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 640px;
}

/* ── Hero ── */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 3rem;
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
}

.hero-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 195, 165, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 195, 165, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(0, 195, 165, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 7vw, 6rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 3rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.btn-primary {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  color: #000;
  background: var(--accent);
  border: none;
  padding: 0.85rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: opacity 0.2s, transform 0.15s;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.btn-outline {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-light);
  padding: 0.85rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: border-color 0.2s, background 0.2s;
  text-decoration: none;
}

.btn-outline:hover {
  border-color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
}

/* ── Problem Section ── */

.problem-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2.25rem;
  transition: border-color 0.3s, transform 0.2s;
}

.problem-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.problem-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.problem-card p {
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.65;
  color: var(--text-secondary);
}

.problem-stat {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.03em;
}

/* ── Product Grid ── */

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 3.5rem;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.product-cell {
  background: var(--bg-primary);
  padding: 2.5rem;
  transition: background 0.3s;
}

.product-cell:hover {
  background: var(--bg-card);
}

.product-cell-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.product-cell-icon .dot {
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.product-cell h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
}

.product-cell p {
  font-size: 0.85rem;
  font-weight: 300;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ── AI Section ── */

.ai-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.ai-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
}

.ai-capabilities {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2.25rem;
  position: relative;
  transition: border-color 0.3s;
}

.ai-card:hover {
  border-color: rgba(0, 195, 165, 0.3);
}

.ai-card-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.ai-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.ai-card p {
  font-size: 0.88rem;
  font-weight: 300;
  line-height: 1.65;
  color: var(--text-secondary);
}

.ai-card .ai-tag {
  display: inline-block;
  margin-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.3rem 0.7rem;
  border-radius: 3px;
  letter-spacing: 0.05em;
}

.ai-callout {
  margin-top: 3rem;
  padding: 2.5rem;
  background: linear-gradient(135deg, rgba(0, 195, 165, 0.08) 0%, rgba(0, 195, 165, 0.02) 100%);
  border: 1px solid rgba(0, 195, 165, 0.2);
  border-radius: 8px;
}

.ai-callout p {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.ai-callout .highlight {
  color: var(--accent);
}

/* ── Hardware Section ── */

.hw-tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
}

.hw-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.2s;
}

.hw-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.hw-card.featured {
  border-color: var(--accent);
}

.hw-card-header {
  padding: 2rem 2rem 0;
  position: relative;
}

.hw-card-tier {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.hw-card.featured .hw-card-tier {
  color: var(--accent);
}

.hw-card-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.hw-card-use {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 300;
}

.hw-card-body {
  padding: 1.75rem 2rem 2rem;
}

.hw-spec {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}

.hw-spec:last-child {
  border-bottom: none;
}

.hw-spec-label {
  color: var(--text-muted);
  font-weight: 400;
}

.hw-spec-value {
  color: var(--text-primary);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.hw-badge {
  display: inline-block;
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.8rem;
  border-radius: 3px;
  background: var(--accent-dim);
  color: var(--accent);
}

/* ── Comparison Table ── */

.comparison-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.comparison-table {
  width: 100%;
  margin-top: 3.5rem;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.comparison-table thead th {
  background: var(--bg-card);
  padding: 1.25rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.comparison-table thead th:last-child {
  color: var(--accent);
}

.comparison-table tbody td {
  padding: 1rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.comparison-table tbody td:first-child {
  font-weight: 500;
  color: var(--text-primary);
}

.check {
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
}

.cross {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.cloud-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--danger);
  background: rgba(255, 68, 68, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  letter-spacing: 0.03em;
}

.local-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  letter-spacing: 0.03em;
}

/* ── Footer ── */

.footer {
  border-top: 1px solid var(--border);
  padding: 5rem 3rem 3rem;
  max-width: 1280px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-brand-sub {
  font-size: 0.88rem;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 0.6rem;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 1.5rem;
}

.footer-legal a {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-legal a:hover {
  color: var(--text-secondary);
}

/* ── Animations ── */

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

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

/* ── Responsive ── */

@media (max-width: 1024px) {
  .section { padding: 5rem 2rem; }
  .hero { padding: 0 2rem; }
  .nav { padding: 1rem 2rem; }
  .problem-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-capabilities { grid-template-columns: 1fr; }
  .hw-tiers { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .section { padding: 4rem 1.5rem; }
  .hero { padding: 0 1.5rem; }
  .section-heading { font-size: 2.2rem; }
  .product-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .comparison-table { font-size: 0.78rem; }
  .comparison-table thead th,
  .comparison-table tbody td { padding: 0.75rem 0.75rem; }
  .footer-top { grid-template-columns: 1fr; }
}