:root {
  --bg-top: #172330;
  --bg-bottom: #0f171f;
  --card-top: rgba(27, 39, 51, 0.97);
  --card-bottom: rgba(16, 24, 32, 0.98);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 201, 78, 0.4);
  --text-main: #f3efdf;
  --text-soft: #a8b5bf;
  --accent: #ffc94e;
  --accent-strong: #ff9c33;
  --accent-text: #261807;
  --shadow: 0 24px 48px rgba(3, 8, 12, 0.5);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  background:
    radial-gradient(circle at top, rgba(255, 201, 78, 0.14), transparent 28%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  color: var(--text-main);
  font-family: "Segoe UI", Tahoma, sans-serif;
}

button,
a {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.landing-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 18px;
}

.landing-card {
  width: min(100%, 620px);
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: linear-gradient(180deg, var(--card-top), var(--card-bottom));
  box-shadow: var(--shadow);
}

.brand-mark {
  margin: 0;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--text-soft);
}

h1 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 7vw, 3.3rem);
  line-height: 1.02;
}

.hero-copy {
  margin: 18px 0 0;
  color: var(--text-soft);
  font-size: 1.08rem;
  line-height: 1.6;
}

.feature-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.feature-chip {
  padding: 0.7rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: #dde5ea;
  font-size: 0.94rem;
  font-weight: 600;
}

.action-row {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.install-button,
.open-link {
  min-height: 62px;
  border-radius: 20px;
  font-size: 1.02rem;
  font-weight: 700;
}

.install-button {
  border: 0;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: var(--accent-text);
  cursor: pointer;
  box-shadow: 0 16px 30px rgba(255, 156, 51, 0.24);
}

.install-button.is-ready {
  box-shadow: 0 18px 34px rgba(255, 156, 51, 0.34);
}

.open-link {
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  background: rgba(255, 201, 78, 0.08);
  color: #ffe6a5;
}

.status-message {
  min-height: 26px;
  margin: 14px 0 0;
  color: var(--text-soft);
  font-size: 0.95rem;
  line-height: 1.45;
}

.status-message.error {
  color: #ffb8ad;
}

@media (max-width: 560px) {
  .landing-card {
    padding: 24px;
  }

  .action-row {
    grid-template-columns: 1fr;
  }

  .install-button,
  .open-link {
    min-height: 58px;
  }
}