:root {
  --color-crimson: #990000;
  --color-background: #121212;
  --color-surface: #1f1f1f;
  --color-text: #f2f2f2;
  --color-muted: #b6b6b6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: radial-gradient(circle at top, #1d1d1d 0%, var(--color-background) 55%);
  color: var(--color-text);
}

.landing-page {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.hero {
  width: min(760px, 100%);
  background-color: var(--color-surface);
  border: 1px solid #2f2f2f;
  border-left: 6px solid var(--color-crimson);
  border-radius: 14px;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.45);
}

.brand {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-muted);
  font-size: 0.85rem;
}

h1 {
  margin: 0.45rem 0 1rem;
  color: var(--color-crimson);
  font-size: clamp(2rem, 5vw, 3rem);
}

.description {
  margin: 0;
  color: var(--color-text);
  line-height: 1.7;
  font-size: clamp(1rem, 2.3vw, 1.15rem);
}

.features {
  width: min(980px, 100%);
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid #2f2f2f;
  border-radius: 12px;
  padding: 0.95rem;
}

.feature-card h2 {
  margin: 0 0 0.5rem;
  color: var(--color-crimson);
  font-size: 1rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--color-text);
}

.app-link {
  display: inline-block;
  margin-top: 1.2rem;
  padding: 0.7rem 1rem;
  background: var(--color-crimson);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  border-radius: 10px;
  border: 1px solid #b00000;
}

.app-link:hover {
  opacity: 0.92;
}

footer {
  border-top: 1px solid #2a2a2a;
  padding: 1.25rem 1rem 1.5rem;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}