:root {
  --bg: #0b1020;
  --bg-elevated: #111a2f;
  --panel: rgba(16, 22, 38, 0.75);
  --panel-strong: #121b2c;
  --stroke: rgba(255, 255, 255, 0.08);
  --text: #ecf3ff;
  --muted: #a8bbd6;
  --primary: #7aa6ff;
  --secondary: #98d0ff;
  --accent: #7af3c6;
  --shadow: 0 30px 80px rgba(29, 56, 92, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(122, 166, 255, 0.18), transparent 25%),
    radial-gradient(circle at bottom right, rgba(122, 243, 198, 0.12), transparent 20%),
    var(--bg);
}

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

button,
a {
  font: inherit;
}

.page-shell {
  min-height: 100vh;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(11, 16, 32, 0.7);
  border-bottom: 1px solid var(--stroke);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

.nav-links {
  display: inline-flex;
  gap: 24px;
  align-items: center;
}

.nav-links a,
.site-footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #07121f;
  box-shadow: 0 20px 35px rgba(122, 166, 255, 0.35);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  border-color: var(--stroke);
}

.button.small {
  padding: 0.7rem 1rem;
}

.hero {
  padding: 72px 0 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 36px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--secondary);
}

.hero-copy h1,
.section-heading h2,
.install-grid h2,
.center h2 {
  margin: 0 0 18px;
  letter-spacing: -0.06em;
  line-height: 1.02;
  color: var(--text);
}

.hero-copy h1 {
  font-size: clamp(2.8rem, 5vw, 5rem);
}

.hero-copy p,
.install-grid p,
.center p,
.feature-card p,
.steps p {
  color: var(--muted);
  line-height: 1.7;
  font-size: 1.03rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.center-row {
  justify-content: center;
}

.quick-points {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
  color: var(--muted);
}

.quick-points li {
  position: relative;
  padding-left: 18px;
}

.quick-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(122, 243, 198, 0.65);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.preview-window {
  width: min(100%, 520px);
  border: 1px solid var(--stroke);
  border-radius: 24px;
  overflow: hidden;
  background: rgba(4, 8, 17, 0.92);
  box-shadow: var(--shadow);
}

.window-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  padding: 0 18px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--stroke);
}

.window-chrome span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.window-chrome span:nth-child(1) { background: #ff7f7f; }
.window-chrome span:nth-child(2) { background: #ffd166; }
.window-chrome span:nth-child(3) { background: #7af3c6; }

.preview-body {
  padding: 26px 24px 28px;
}

.hero-app-icon {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  margin-bottom: 18px;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.35);
}

.preview-header {
  margin-bottom: 22px;
  font-weight: 700;
  color: var(--secondary);
}

.preview-content {
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(17, 26, 43, 0.9), rgba(12, 18, 30, 0.9));
  border: 1px solid var(--stroke);
  padding: 20px 18px;
}

.preview-content h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.preview-content p {
  margin: 0 0 8px;
  color: #d9e5ff;
  line-height: 1.7;
}

.section {
  padding: 52px 0;
}

.section.muted {
  background: rgba(17, 24, 38, 0.55);
  border-block: 1px solid var(--stroke);
}

.section-heading {
  margin-bottom: 28px;
  text-align: center;
}

.section-heading.left {
  text-align: left;
}

.section-heading h2,
.install-grid h2,
.center h2 {
  font-size: clamp(2rem, 3vw, 3rem);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.feature-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--stroke);
  border-radius: 22px;
  padding: 24px;
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.02);
}

.feature-card h3 {
  margin: 16px 0 10px;
  font-size: 1.25rem;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(122, 166, 255, 0.2), rgba(122, 243, 198, 0.2));
  border: 1px solid var(--stroke);
  font-size: 1.5rem;
}

.narrow {
  max-width: 920px;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: start;
  padding: 20px 18px;
  border: 1px solid var(--stroke);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.02);
}

.steps span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(122, 166, 255, 0.25), rgba(152, 208, 255, 0.25));
  color: var(--text);
}

.steps h3 {
  margin: 0 0 8px;
}

.install-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 30px;
  align-items: center;
}

.install-card {
  border: 1px solid var(--stroke);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(17, 26, 43, 0.9), rgba(11, 16, 32, 0.9));
  padding: 26px 22px;
  box-shadow: var(--shadow);
}

.install-card h3 {
  margin-top: 0;
}

.install-card ol {
  margin: 0;
  padding-left: 1.3rem;
  color: var(--muted);
  line-height: 2;
}

.donate {
  padding-bottom: 80px;
}

.site-footer {
  border-top: 1px solid var(--stroke);
  color: var(--muted);
  background: rgba(7, 11, 18, 0.7);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  min-height: 72px;
}

.footer-inner div:last-child {
  display: flex;
  gap: 20px;
}

@media (max-width: 860px) {
  .nav {
    flex-wrap: wrap;
    justify-content: center;
    padding: 14px 0;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero-grid,
  .feature-grid,
  .install-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 42px;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    padding: 18px 0;
  }
}