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

:root {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --bg-card: #1a1a1a;
  --border: #2a2a2a;
  --text: #e8e8e8;
  --text-muted: #888;
  --accent: #f8f675;
  --accent-dim: rgba(248, 246, 117, 0.15);
  --accent-hover: #faf89a;
  --success: #4ade80;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  --radius: 12px;
  --max-w: 1120px;
}

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

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent-hover);
}

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ─── Nav ─── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

.nav-tagline {
  display: block;
  font-size: 0.6rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  line-height: 1;
  margin-top: -2px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ─── Hero ─── */

.hero {
  padding: 8rem 0 4rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(248, 246, 117, 0.25);
  border-radius: 999px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--bg);
  background: var(--accent);
  border-radius: 8px;
  transition: background 0.2s, transform 0.15s;
}

.hero-cta:hover {
  background: var(--accent-hover);
  color: var(--bg);
  transform: translateY(-1px);
}

/* ─── Features ─── */

.features {
  padding: 4rem 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: rgba(248, 246, 117, 0.3);
  transform: translateY(-2px);
}

.feature-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ─── Pricing ─── */

.pricing {
  padding: 4rem 0;
}

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

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color 0.2s, transform 0.2s;
}

.price-card:hover {
  transform: translateY(-2px);
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 30px rgba(248, 246, 117, 0.08);
}

.price-badge {
  position: absolute;
  top: -0.65rem;
  right: 1.25rem;
  background: var(--accent);
  color: var(--bg);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
}

.price-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.price-amount {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}

.price-amount span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-muted);
}

.price-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.price-features {
  list-style: none;
  flex: 1;
  margin-bottom: 1.5rem;
}

.price-features li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 0.35rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.price-features li::before {
  content: "✓";
  color: var(--success);
  font-weight: 700;
  font-size: 0.8rem;
}

.price-btn {
  display: block;
  text-align: center;
  padding: 0.7rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px;
  transition: background 0.2s, transform 0.15s;
  cursor: pointer;
  border: none;
  font-family: var(--font);
}

.price-btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.price-btn-outline:hover {
  background: var(--bg-elevated);
  border-color: var(--text-muted);
  color: var(--text);
}

.price-btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.price-btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg);
  transform: translateY(-1px);
}

/* ─── Install ─── */

.install {
  padding: 4rem 0;
}

.install-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
}

.install-box h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.install-box > p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.install-steps {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: left;
}

.install-step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.step-num {
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50%;
  flex-shrink: 0;
}

.install-step code {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
  word-break: break-all;
}

/* ─── Panic CTA ─── */

.panic-section {
  padding: 2rem 0;
}

.panic-box {
  background: var(--bg-card);
  border: 1px solid #3a2020;
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.panic-icon {
  font-size: 1.5rem;
  color: #ef4444;
}

.panic-content {
  flex: 1;
}

.panic-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.panic-content p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.panic-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  transition: background 0.2s, border-color 0.2s;
  flex-shrink: 0;
  white-space: nowrap;
}

.panic-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.5);
  color: #ef4444;
}

.nav-panic {
  color: #ef4444 !important;
  font-weight: 600 !important;
}

.nav-panic:hover {
  color: #f87171 !important;
}

/* ─── Security ─── */

.security {
  padding: 4rem 0;
}

.security-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.security-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.security-item > i {
  font-size: 1.25rem;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.security-item strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.security-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ─── Footer ─── */

footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer-brand {
  font-weight: 700;
  color: var(--text);
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

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

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

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

/* ─── Responsive: Tablet (640px+) ─── */

@media (min-width: 640px) {
  .hero h1 {
    font-size: 3rem;
  }

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

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

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

  .install-steps {
    max-width: 500px;
    margin: 0 auto;
  }

  .panic-box {
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: 1.5rem;
    padding: 1.5rem 2rem;
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ─── Responsive: Desktop (960px+) ─── */

@media (min-width: 960px) {
  .hero {
    padding: 10rem 0 5rem;
  }

  .hero h1 {
    font-size: 3.5rem;
  }

  .hero p {
    font-size: 1.2rem;
  }

  .features {
    padding: 5rem 0;
  }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-title {
    font-size: 2rem;
  }

  .pricing {
    padding: 5rem 0;
  }

  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .security {
    padding: 5rem 0;
  }

  .install {
    padding: 5rem 0;
  }

  .install-box {
    padding: 3rem 2rem;
  }
}