:root {
  color-scheme: light dark;

  --bg: #f6f7f9;
  --bg-alt: #eceef2;
  --surface: #ffffff;
  --border: #dfe3e8;
  --text: #14161a;
  --text-muted: #565d68;
  --text-faint: #8a919c;

  --blue: #2f6fed;
  --blue-strong: #1d4fbf;
  --green: #1fae7a;
  --green-strong: #14875f;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20, 22, 26, 0.04), 0 8px 24px rgba(20, 22, 26, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d10;
    --bg-alt: #101318;
    --surface: #151920;
    --border: #262c35;
    --text: #eef1f5;
    --text-muted: #a4acb8;
    --text-faint: #6b7280;

    --blue: #6ea6ff;
    --blue-strong: #4f8cff;
    --green: #34d399;
    --green-strong: #22c08b;

    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

code, .inline-code {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
}

code {
  background: var(--bg-alt);
  padding: 0.12em 0.4em;
  border-radius: 5px;
  border: 1px solid var(--border);
}

.inline-code {
  display: inline-block;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 6px;
  margin-top: 4px;
}

a { color: var(--blue-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  font-size: 15px;
}
.brand:hover { text-decoration: none; }

.brand-icon {
  border-radius: 7px;
  display: block;
}

.topnav {
  display: flex;
  gap: 24px;
}

.topnav a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
}
.topnav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero {
  padding: 84px 0 56px;
  text-align: center;
}

.hero-icon {
  border-radius: 22px;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 780px;
  margin-inline: auto;
}

.hero-sub {
  max-width: 620px;
  margin: 0 auto 32px;
  color: var(--text-muted);
  font-size: 16px;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-meta {
  color: var(--text-faint);
  font-size: 13px;
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: linear-gradient(135deg, var(--blue-strong), var(--green-strong));
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-primary:hover { transform: translateY(-1px); }

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--text-faint); }

.btn-small {
  padding: 8px 14px;
  font-size: 13.5px;
  border-radius: 8px;
}

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section-title {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  text-align: center;
  margin: 0 0 40px;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  margin: -20px auto 40px;
  max-width: 560px;
}
.section-sub.small { font-size: 14px; margin-top: 40px; margin-bottom: 0; }

.grid {
  display: grid;
  gap: 20px;
}

.features-grid {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.card-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 18px;
  margin-bottom: 14px;
}

.icon-blue { background: color-mix(in srgb, var(--blue) 18%, transparent); }
.icon-green { background: color-mix(in srgb, var(--green) 18%, transparent); }

.card h3 {
  font-size: 16px;
  margin: 0 0 8px;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14.5px;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-num {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-strong), var(--green-strong));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 14px;
}

.step h3 { font-size: 15.5px; margin: 0 0 8px; }
.step p { margin: 0; color: var(--text-muted); font-size: 14px; }

/* Platform / download cards */
.platform-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 8px;
}

.platform-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.platform-card.recommended {
  border-color: var(--blue-strong);
  box-shadow: 0 0 0 1px var(--blue-strong);
}

.platform-card h3 {
  margin: 0 0 4px;
  font-size: 17px;
}

.platform-note {
  color: var(--text-faint);
  font-size: 13px;
  margin: 6px 0;
}

.platform-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

.platform-links .btn-primary {
  width: 100%;
  justify-content: center;
}

.platform-links .secondary-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  justify-content: center;
  margin-top: 4px;
}

.platform-links .secondary-links a {
  font-size: 13px;
  color: var(--text-muted);
}

/* Tech */
.tech-inner { max-width: 780px; }
.tech-grid { grid-template-columns: repeat(2, 1fr); }
.tech-item h3 { margin: 0 0 8px; font-size: 15.5px; }
.tech-item p { margin: 0; color: var(--text-muted); font-size: 14.5px; }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13.5px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 18px;
}

@media (max-width: 860px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .topnav { display: none; }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
}