/* Design tokens are shared with the Arlo website (arlo-rust/website/styles.css). */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --color-accent: #5856D6;
  --color-accent-hover: #4745B5;
  --color-accent-light: rgba(88, 86, 214, 0.08);
  --color-accent-glow: rgba(88, 86, 214, 0.15);

  --color-text-primary: #1a1a2e;
  --color-text-secondary: #64648c;
  --color-text-tertiary: #8e8eaa;

  --color-bg: #ffffff;
  --color-bg-secondary: #f8f8fc;
  --color-bg-tertiary: #f0f0f8;
  --color-border: rgba(0, 0, 0, 0.06);
  --color-border-strong: rgba(0, 0, 0, 0.1);

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

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.1);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
code { font-family: var(--font-mono); font-size: 0.875em; background: var(--color-bg-tertiary); padding: 1px 6px; border-radius: 4px; }

/* ===== Layout ===== */
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.section-header { text-align: center; max-width: 560px; margin: 0 auto 64px; }
.section-header h2 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 12px; }
.section-header p { font-size: 1.125rem; color: var(--color-text-secondary); }

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.125rem; letter-spacing: -0.01em; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 0.875rem; font-weight: 500; color: var(--color-text-secondary); transition: color var(--transition-fast); }
.nav-links a:hover { color: var(--color-text-primary); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--color-text-primary); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.9375rem; font-weight: 500; padding: 10px 20px;
  border-radius: var(--radius-pill); border: 1px solid transparent;
  cursor: pointer; transition: all var(--transition-fast);
}
.nav-links a.btn-sm { padding: 6px 14px; font-size: 0.8125rem; border-color: var(--color-border-strong); color: var(--color-text-primary); }
.nav-links a.btn-sm:hover { background: var(--color-bg-tertiary); }
.btn-primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); box-shadow: 0 4px 16px rgba(88, 86, 214, 0.3); }
.btn-secondary { background: var(--color-bg); color: var(--color-text-primary); border-color: var(--color-border-strong); }
.btn-secondary:hover { background: var(--color-bg-tertiary); }

/* ===== Hero ===== */
.hero { padding: 160px 0 100px; overflow: hidden; }
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.hero-badge { display: inline-block; padding: 6px 14px; background: var(--color-accent-light); color: var(--color-accent); font-size: 0.8125rem; font-weight: 600; border-radius: var(--radius-pill); margin-bottom: 24px; }
.hero h1 { font-size: 3.5rem; font-weight: 700; line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 20px; }
.hero-subtitle { font-size: 1.125rem; color: var(--color-text-secondary); line-height: 1.7; max-width: 460px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== Side-panel mockup ===== */
.panel-frame {
  width: 100%; max-width: 380px; margin: 0 auto;
  background: var(--color-bg); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl), 0 0 0 1px var(--color-border-strong);
  overflow: hidden;
}
.panel-titlebar { display: flex; align-items: center; gap: 10px; padding: 12px 16px; background: var(--color-bg-secondary); border-bottom: 1px solid var(--color-border); font-size: 0.875rem; font-weight: 600; }
.panel-body { padding: 20px 16px; display: flex; flex-direction: column; gap: 14px; min-height: 360px; font-size: 0.875rem; }
.bubble { max-width: 85%; padding: 10px 14px; border-radius: var(--radius-md); line-height: 1.5; }
.bubble-user { align-self: flex-end; background: var(--color-accent); color: #fff; border-bottom-right-radius: 4px; }
.bubble-arlo { align-self: flex-start; background: var(--color-bg-tertiary); border-bottom-left-radius: 4px; }
.tool-chip { align-self: flex-start; display: inline-flex; align-items: center; gap: 8px; padding: 4px 12px; font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-secondary); background: var(--color-bg); border: 1px solid var(--color-border-strong); border-radius: var(--radius-pill); }
.tool-chip::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: #4ade80; }
.panel-input { margin-top: auto; display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border: 1px solid var(--color-border-strong); border-radius: var(--radius-pill); color: var(--color-text-tertiary); font-size: 0.8125rem; }
.panel-stop { font-size: 0.75rem; font-weight: 600; color: var(--color-accent); }

/* ===== Features ===== */
.features { padding: 100px 0; background: var(--color-bg-secondary); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 32px 28px; transition: all var(--transition-base); }
.feature-card:hover { border-color: var(--color-accent-glow); box-shadow: var(--shadow-md), 0 0 0 1px var(--color-accent-glow); transform: translateY(-2px); }
.feature-icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--color-accent-light); color: var(--color-accent); border-radius: var(--radius-sm); margin-bottom: 20px; }
.feature-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.feature-card p { font-size: 0.875rem; color: var(--color-text-secondary); }

/* ===== Steps ===== */
.steps { padding: 100px 0; }
.steps-list { max-width: 720px; margin: 0 auto; list-style: none; counter-reset: step; display: flex; flex-direction: column; gap: 20px; }
.steps-list li { counter-increment: step; display: flex; gap: 20px; align-items: flex-start; padding: 24px 28px; border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.steps-list li::before { content: counter(step); flex-shrink: 0; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: var(--color-accent-light); color: var(--color-accent); font-weight: 600; border-radius: 50%; }
.steps-list h3 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.steps-list p { font-size: 0.9375rem; color: var(--color-text-secondary); }

/* ===== Privacy teaser ===== */
.privacy-teaser { padding: 100px 0; background: var(--color-bg-secondary); }
.privacy-card { max-width: 720px; margin: 0 auto; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 40px; box-shadow: var(--shadow-md); }
.privacy-card ul { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.privacy-card li { padding-left: 24px; position: relative; color: var(--color-text-secondary); }
.privacy-card li::before { content: '✓'; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }
.privacy-card li strong { color: var(--color-text-primary); font-weight: 600; }

/* ===== Sub-page ===== */
.page-hero { padding: 140px 0 56px; border-bottom: 1px solid var(--color-border); background: var(--color-bg-secondary); }
.page-hero .container { max-width: 760px; }
.page-back { display: inline-block; margin-bottom: 20px; font-size: 0.875rem; font-weight: 500; color: var(--color-text-secondary); transition: color var(--transition-fast); }
.page-back:hover { color: var(--color-accent); }
.page-hero h1 { font-size: 2.75rem; font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; margin-bottom: 16px; }
.page-hero p { font-size: 1.125rem; color: var(--color-text-secondary); }

.prose { padding: 64px 0 100px; }
.prose .container { max-width: 760px; }
.prose h2 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; margin: 48px 0 12px; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { font-size: 1rem; color: var(--color-text-secondary); }
.prose p + p { margin-top: 12px; }
.prose ul { padding-left: 22px; margin-top: 8px; }
.prose li { margin-bottom: 6px; }
.prose li strong, .prose p strong { color: var(--color-text-primary); font-weight: 600; }
.prose a { color: var(--color-accent); font-weight: 500; }
.prose a:hover { text-decoration: underline; }
.table-wrap { overflow-x: auto; margin-top: 12px; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.prose th, .prose td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--color-border); vertical-align: top; color: var(--color-text-secondary); }
.prose th { background: var(--color-bg-secondary); color: var(--color-text-primary); font-weight: 600; }
.prose tr:last-child td { border-bottom: none; }
.prose td:first-child { white-space: nowrap; }

/* ===== 404 ===== */
.notfound { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 24px; }
.notfound h1 { font-size: 4rem; font-weight: 700; letter-spacing: -0.03em; color: var(--color-accent); margin-bottom: 12px; }
.notfound p { font-size: 1.125rem; color: var(--color-text-secondary); margin-bottom: 28px; }

/* ===== Footer ===== */
.footer { padding: 32px 0; border-top: 1px solid var(--color-border); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; }
.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 0.9375rem; color: var(--color-text-secondary); }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 0.8125rem; color: var(--color-text-tertiary); transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--color-text-primary); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; gap: 48px; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: rgba(255, 255, 255, 0.96); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); flex-direction: column; padding: 24px; gap: 16px; border-bottom: 1px solid var(--color-border); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 2.5rem; }
  .features-grid { grid-template-columns: 1fr; }
  .section-header h2 { font-size: 1.75rem; }
  .page-hero { padding: 110px 0 44px; }
  .page-hero h1 { font-size: 2rem; }
  .privacy-card { padding: 28px 24px; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
}
.footer-links a[aria-current="page"] { color: var(--color-text-primary); }