:root {
  --ink: #f5f5f5;
  --ink-muted: #a3a3a3;
  --ink-faint: #737373;
  --paper: #0a0a0a;
  --elev: #141414;
  --elev-2: #1a1a1a;
  --line: #2a2a2a;
  --line-soft: rgba(255, 255, 255, 0.08);
  --accent: #ffffff;
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 72px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body { min-height: 100vh; }

a { color: var(--ink); transition: color 180ms var(--ease); }
a:hover { color: var(--accent); }

img { display: block; }

/* Icons (Lucide) */
.icon-xs { width: 14px; height: 14px; stroke-width: 2; }
.icon-sm { width: 18px; height: 18px; stroke-width: 2; }
.icon-md { width: 22px; height: 22px; stroke-width: 1.75; }
.inline-icon { display: inline; vertical-align: -3px; margin: 0 2px; }

/* Background */
.site-body { overflow-x: hidden; }

.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.site-bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.site-bg-glow-a {
  width: 60vw;
  height: 50vh;
  top: -15%;
  left: -10%;
  background: rgba(255, 255, 255, 0.06);
}

.site-bg-glow-b {
  width: 50vw;
  height: 40vh;
  bottom: 10%;
  right: -15%;
  background: rgba(255, 255, 255, 0.03);
}

.site-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 20%, black 10%, transparent 70%);
}

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 20px;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0;
  transition: background 280ms var(--ease), border-color 280ms var(--ease), backdrop-filter 280ms var(--ease);
}

.site-nav.is-scrolled {
  background: rgba(10, 10, 10, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: -1px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.03em;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  object-fit: contain;
}

.site-nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
  font-size: 14px;
  font-weight: 500;
}

.site-nav-links a {
  color: var(--ink-muted);
  text-decoration: none;
}

.site-nav-links a:hover,
.site-nav-links a[aria-current="page"] {
  color: var(--ink);
}

.site-nav-cta { margin-left: 4px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 20px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 200ms var(--ease), filter 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

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

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

.btn-primary:hover {
  color: var(--paper);
  filter: brightness(0.94);
}

.btn-secondary {
  background: var(--elev);
  color: var(--ink);
  border-color: var(--line);
}

.btn-secondary:hover {
  color: var(--ink);
  border-color: #525252;
  background: var(--elev-2);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-muted);
  border-color: var(--line);
}

.btn-ghost:hover {
  color: var(--ink);
  border-color: #525252;
}

.btn-sm { padding: 9px 16px; font-size: 13px; border-radius: 12px; }
.btn-lg { padding: 16px 26px; font-size: 16px; border-radius: 16px; }

/* Hero */
.hero {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(48px, 10vw, 96px) 0 clamp(40px, 8vw, 72px);
}

.hero-centered .hero-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.hero-centered .hero-actions {
  justify-content: center;
}

.hero-centered .hero-lede {
  margin-left: auto;
  margin-right: auto;
}

.hero-quick-steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hero-quick-steps li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--elev);
  border: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--ink-muted);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.hero-quick-steps li:hover {
  border-color: #404040;
  background: var(--elev-2);
}

.hero-quick-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
}

.hero-quick-text strong {
  color: var(--ink);
  font-weight: 600;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--elev);
  border: 1px solid var(--line-soft);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(38px, 6vw, 58px);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1.02;
}

.text-gradient {
  background: linear-gradient(135deg, #fff 0%, #a3a3a3 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  margin: 0 0 28px;
  font-size: clamp(17px, 2.2vw, 19px);
  line-height: 1.5;
  color: var(--ink-muted);
  max-width: 36ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--ink-faint);
}

.hero-badges li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Hero visual */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 3vw, 28px);
  padding: clamp(24px, 4vw, 40px);
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(20, 20, 20, 0.95) 0%, rgba(10, 10, 10, 0.7) 100%);
  border: 1px solid var(--line);
}

.device-card { display: flex; flex-direction: column; align-items: center; gap: 12px; }

.device-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.device-screen {
  position: relative;
  width: clamp(96px, 14vw, 120px);
  height: clamp(150px, 22vw, 190px);
  border-radius: 20px;
  border: 2px solid #404040;
  background: #111;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
}

.photo-chip {
  flex: 1;
  border-radius: 10px;
  background: linear-gradient(135deg, #333 0%, #555 100%);
}

.photo-chip-sm { flex: 0.55; opacity: 0.45; }

.send-pill {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--paper);
  font-size: 10px;
  font-weight: 700;
}

.flow-connector {
  position: relative;
  display: flex;
  align-items: center;
  width: clamp(36px, 8vw, 56px);
}

.flow-line {
  display: block;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #525252, transparent);
}

.flow-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 8px;
  margin: -4px 0 0 -4px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-flow 2.2s ease-in-out infinite;
}

.flow-arrow {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  color: var(--ink-muted);
  background: var(--paper);
}

@keyframes pulse-flow {
  0%, 100% { opacity: 0.35; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.15); }
}

.browser-chrome {
  width: clamp(150px, 24vw, 200px);
  border-radius: 14px;
  border: 2px solid #404040;
  background: #141414;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
}

.browser-dots {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  background: #1a1a1a;
  border-bottom: 1px solid var(--line);
}

.browser-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #404040;
}

.browser-panel {
  margin: 14px;
  padding: 20px 10px;
  border-radius: 10px;
  border: 2px dashed #525252;
  text-align: center;
}

.browser-file {
  width: 60%;
  height: 36px;
  margin: 0 auto 10px;
  border-radius: 8px;
  background: linear-gradient(135deg, #333, #555);
}

.drop-hint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* Sections */
.section {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(48px, 8vw, 88px) 0;
}

.section-muted {
  padding-left: clamp(20px, 4vw, 40px);
  padding-right: clamp(20px, 4vw, 40px);
  width: min(1120px, 100%);
  background: linear-gradient(180deg, transparent 0%, rgba(20, 20, 20, 0.5) 50%, transparent 100%);
}

.section-head {
  margin-bottom: clamp(28px, 5vw, 44px);
  max-width: 640px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.section-head p {
  margin: 0;
  font-size: 17px;
  color: var(--ink-muted);
}

.section-head strong { color: var(--ink); }

/* Install steps */
.install-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.install-step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: clamp(20px, 3vw, 28px);
  border-radius: 18px;
  background: var(--elev);
  border: 1px solid var(--line);
  transition: border-color 240ms var(--ease), transform 240ms var(--ease);
}

.install-step:hover {
  border-color: #404040;
  transform: translateY(-2px);
}

.step-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.install-step h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.install-step p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-muted);
  max-width: 58ch;
}

.install-step p:last-child { margin-bottom: 0; }

.callout {
  display: flex;
  gap: 20px;
  margin-top: 28px;
  padding: clamp(24px, 4vw, 32px);
  border-radius: 20px;
  background: linear-gradient(135deg, #1a1a1a 0%, #121212 100%);
  border: 1px solid var(--line);
}

.callout-icon { flex-shrink: 0; color: var(--ink-muted); }

.callout h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
}

.callout p {
  margin: 0 0 16px;
  color: var(--ink-muted);
  font-size: 15px;
  line-height: 1.55;
}

.callout-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.info-card {
  padding: 28px 24px;
  border-radius: 18px;
  background: var(--elev);
  border: 1px solid var(--line);
  transition: border-color 240ms var(--ease), transform 240ms var(--ease);
}

.info-card:hover {
  border-color: #404040;
  transform: translateY(-3px);
}

.info-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  border-radius: 12px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  color: var(--ink-muted);
}

.info-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.info-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.feature-tile {
  padding: 24px 22px;
  border-radius: 16px;
  background: var(--elev);
  border: 1px solid var(--line);
  transition: border-color 240ms var(--ease), transform 240ms var(--ease);
}

.feature-tile:hover {
  border-color: #404040;
  transform: translateY(-2px);
}

.feature-tile i { color: var(--ink-muted); margin-bottom: 14px; }

.feature-tile h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
}

.feature-tile p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-muted);
}

/* CTA band */
.cta-band {
  width: min(1120px, calc(100% - 32px));
  margin: clamp(32px, 6vw, 64px) auto;
  padding: clamp(40px, 7vw, 64px);
  border-radius: 24px;
  background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
  border: 1px solid var(--line);
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.cta-band p {
  margin: 0 0 28px;
  color: var(--ink-muted);
  font-size: 16px;
  max-width: 44ch;
  margin-left: auto;
  margin-right: auto;
}

.cta-band-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* Footer */
.site-footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 32px;
}

.site-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-left: auto;
  font-size: 13px;
}

.site-footer-links a {
  color: var(--ink-muted);
  text-decoration: none;
}

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

.site-footer-copy {
  width: 100%;
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--ink-faint);
}

/* Animations */
.fade-up {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  transition-delay: var(--delay, 0s);
}

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

/* Guide / doc pages */
.wrap {
  width: min(720px, calc(100% - 40px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

.wrap-wide {
  width: min(800px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(24px, 5vw, 48px) 0 80px;
}

.guide-hero { margin-bottom: 40px; }

.guide-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.guide-lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-muted);
  max-width: 52ch;
}

.guide-block {
  margin-bottom: 36px;
  padding: clamp(24px, 4vw, 32px);
  border-radius: 20px;
  background: var(--elev);
  border: 1px solid var(--line);
}

.guide-block-muted {
  background: transparent;
  border-style: dashed;
}

.guide-block h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.guide-steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  counter-reset: guide;
}

.guide-steps li {
  counter-increment: guide;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 4px 14px;
  margin-bottom: 18px;
}

.guide-steps li::before {
  content: counter(guide);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-faint);
  line-height: 1.7;
}

.guide-steps strong {
  grid-column: 2;
  color: var(--ink);
  font-size: 15px;
}

.guide-steps span {
  grid-column: 2;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.5;
}

.guide-tips {
  margin: 0;
  padding-left: 1.2em;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.6;
}

.guide-tips li { margin: 8px 0; }

.doc h1 {
  margin: 0 0 8px;
  font-size: 32px;
  letter-spacing: -0.04em;
}

.meta {
  margin: 0 0 28px;
  color: var(--ink-faint);
  font-size: 13px;
  font-family: var(--mono);
}

.doc h2 {
  margin: 28px 0 10px;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.doc h3 {
  margin: 18px 0 8px;
  font-size: 15px;
}

.doc p, .doc li {
  color: var(--ink-muted);
  font-size: 15px;
}

.doc ul {
  padding-left: 1.2em;
  margin: 0 0 8px;
}

.doc li { margin: 6px 0; }
.doc strong { color: var(--ink); }

.footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 12px;
}

.cta-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  padding: 12px 18px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--paper);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}

.cta-link:hover {
  color: var(--paper);
  filter: brightness(0.92);
}

/* Responsive */
@media (max-width: 640px) {
  .site-nav-links { display: none; }

  .hero-quick-steps {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-quick-steps li {
    justify-content: flex-start;
    border-radius: 14px;
  }

  .callout { flex-direction: column; }

  .site-footer-links { margin-left: 0; }

  .install-step {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .step-badge { width: 36px; height: 36px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .flow-dot { animation: none; }

  .btn:hover,
  .info-card:hover,
  .feature-tile:hover,
  .install-step:hover {
    transform: none;
  }
}