:root {
  color-scheme: dark;
  --surface: #0c0c0e;
  --surface-low: #131316;
  --surface-container: #19191d;
  --surface-high: #222227;
  --surface-highest: #2b2b31;
  --primary: #ff454d;
  --primary-hover: #ff5c63;
  --primary-pressed: #e50914;
  --primary-dark: #410004;
  --on-primary: #300002;
  --success: #64d991;
  --success-dark: #00210e;
  --warning: #ffb95c;
  --text-primary: #f2eceb;
  --text-secondary: #cab8b6;
  --text-muted: #9c8886;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-red: rgba(255, 69, 77, 0.3);
  --radius: 8px;
  --radius-pill: 999px;
  --content: 1160px;
  --reading: 780px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--surface);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover {
  color: var(--primary);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-160%);
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

/* Site Layout Containers */
.site-header,
.site-footer,
.page-section,
.signal-band {
  width: min(100% - 40px, var(--content));
  margin-inline: auto;
}

/* Header */
.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-icon {
  border-radius: 6px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.15s ease;
}

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

/* Hero Section */
.hero {
  padding: 72px 0 64px;
  width: min(100% - 40px, var(--content));
  margin-inline: auto;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 56px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--primary);
  margin-top: 0;
  margin-bottom: 16px;
}

.pulse-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--primary);
  box-shadow: 0 0 0 0 rgba(255, 69, 77, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 69, 77, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(255, 69, 77, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 69, 77, 0); }
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
  color: #ffffff;
}

.hero-lead {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  line-height: 1.35;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 16px;
}

.hero-body {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 0 28px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.pill-badge {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.02em;
}

.pill-red {
  background: rgba(255, 69, 77, 0.14);
  color: var(--primary);
  border: 1px solid var(--border-red);
}

.pill-green {
  background: rgba(100, 217, 145, 0.12);
  color: var(--success);
  border: 1px solid rgba(100, 217, 145, 0.28);
}

.pill-dark {
  background: var(--surface-high);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
  border: none;
}

.button:active {
  transform: scale(0.98);
}

.button-primary {
  background: var(--primary);
  color: #ffffff;
}

.button-primary:hover {
  background: var(--primary-hover);
  color: #ffffff;
}

.button-secondary {
  background: var(--surface-container);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.button-secondary:hover {
  background: var(--surface-high);
  border-color: rgba(255, 255, 255, 0.25);
}

.hero-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.hero-meta code {
  font-family: "JetBrains Mono", monospace;
  background: var(--surface-low);
  padding: 3px 6px;
  border-radius: 4px;
  color: var(--text-secondary);
}

/* Phone Mockup in Hero */
.hero-device {
  display: flex;
  justify-content: center;
}

.phone-frame {
  width: 100%;
  max-width: 330px;
  background: #000000;
  border-radius: 36px;
  padding: 12px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 69, 77, 0.15);
  position: relative;
}

.phone-speaker {
  width: 72px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  margin: 8px auto 14px;
}

.phone-screen {
  width: 100%;
  height: auto;
  border-radius: 24px;
  display: block;
  background: #0c0c0e;
}

.phone-caption {
  margin-top: 14px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.caption-tag {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  font-weight: 800;
  color: var(--primary);
}

.caption-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* Signal Band */
.signal-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 72px;
}

.signal-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.signal-icon {
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-top: 2px;
}

.signal-green {
  color: var(--success);
}

.signal-red {
  color: var(--primary);
}

.signal-text strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.signal-text span {
  display: block;
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Page Sections */
.page-section {
  padding: 64px 0;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: #ffffff;
}

.section-heading p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--surface-container);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.feature-card:hover {
  background: var(--surface-high);
  border-color: rgba(255, 255, 255, 0.16);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-num {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
}

.status-indicator {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 4px;
}

.status-green {
  background: rgba(100, 217, 145, 0.12);
  color: var(--success);
}

.status-red {
  background: rgba(255, 69, 77, 0.12);
  color: var(--primary);
}

.status-dark {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: #ffffff;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 20px;
  flex-grow: 1;
}

.feature-checklist {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-checklist li {
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
  padding-left: 18px;
}

.feature-checklist li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* Tabs & Screenshot Showcase */
.tabs-container {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.tab-list {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  padding-bottom: 2px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 18px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.showcase-display {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 48px;
  align-items: center;
  background: var(--surface-container);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
}

.showcase-mockup {
  display: flex;
  justify-content: center;
}

.showcase-mockup img {
  border-radius: 20px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  max-width: 100%;
  height: auto;
}

.showcase-info h3 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  color: #ffffff;
}

.showcase-info p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0 0 32px;
}

.spec-table {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 0.9rem;
}

.spec-label {
  color: var(--text-muted);
}

.spec-value {
  color: var(--text-primary);
  font-weight: 600;
  text-align: right;
}

/* Architecture / Local-First Box */
.arch-box {
  background: var(--surface-container);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 44px;
}

.arch-content h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: #ffffff;
}

.arch-content > p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 0 36px;
}

.arch-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.arch-point strong {
  display: block;
  font-size: 1.05rem;
  color: #ffffff;
  margin-bottom: 8px;
}

.arch-point p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.arch-point code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85em;
  background: var(--surface-low);
  padding: 2px 5px;
  border-radius: 4px;
}

.arch-cta {
  border-top: 1px solid var(--border);
  padding-top: 28px;
}

/* Support Section */
.support-section {
  text-align: center;
}

.support-section .section-heading {
  margin-inline: auto;
}

.support-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 48px;
  margin-top: 72px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
}

.brand-footer {
  font-size: 1.1rem;
}

.footer-nav {
  display: flex;
  gap: 24px;
}

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

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

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.footer-disclaimer {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
  margin: 0;
  max-width: 780px;
  line-height: 1.5;
}

/* Legal Pages (Privacy) */
.legal-main {
  width: min(100% - 40px, var(--reading));
  margin: 56px auto 72px;
}

.legal-document {
  background: var(--surface-container);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px;
}

.legal-document h1 {
  font-size: 2.5rem;
  line-height: 1.1;
  font-weight: 800;
  margin: 0 0 12px;
  color: #ffffff;
}

.legal-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.legal-meta a {
  color: var(--primary);
}

.legal-lead {
  font-size: 1.12rem;
  line-height: 1.65;
  color: var(--text-primary);
  margin-bottom: 36px;
}

.legal-document section {
  margin-bottom: 36px;
}

.legal-document h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 12px;
}

.legal-document p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 16px;
}

.legal-document ul {
  padding-left: 24px;
  margin: 0 0 16px;
}

.legal-document li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 8px;
}

.legal-document code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.88em;
  background: var(--surface-low);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-primary);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-device {
    justify-content: flex-start;
  }

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

  .signal-band {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .showcase-display {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 0;
    min-height: auto;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    gap: 16px;
  }

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

  .signal-band {
    grid-template-columns: 1fr;
  }

  .showcase-display {
    padding: 24px;
  }

  .legal-document {
    padding: 24px;
  }

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-nav {
    flex-wrap: wrap;
    gap: 16px;
  }

  .arch-box {
    padding: 28px 20px;
  }
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}