:root {
  --bg: #eef2f5;
  --ink: #17212b;
  --muted: #647484;
  --line: #dce4ea;
  --danger: #991b1b;
  --danger-dark: #7f1d1d;
  --surface: #ffffff;
  --shadow: 0 18px 38px rgba(15, 23, 42, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
}

.launcher-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
}

.launcher-sidebar {
  background: var(--danger);
  color: #ffffff;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  object-fit: contain;
}

.brand strong,
.brand span,
.sandbox-tag strong,
.sandbox-tag span {
  display: block;
}

.brand span,
.sandbox-tag span {
  color: #fee2e2;
  font-size: 13px;
  margin-top: 3px;
}

.sandbox-tag {
  border: 1px solid rgba(254, 202, 202, 0.45);
  background: rgba(127, 29, 29, 0.48);
  border-radius: 8px;
  padding: 14px;
}

.launcher-main {
  padding: 34px;
}

.page-heading {
  margin-bottom: 24px;
}

.page-heading p {
  margin: 0 0 6px;
  color: var(--danger);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-heading h1 {
  margin: 0;
  font-size: 32px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.app-card {
  min-height: 180px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 22px;
  color: inherit;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-card:hover,
.app-card:focus {
  border-color: #ef4444;
  outline: 3px solid rgba(239, 68, 68, 0.2);
}

.app-code {
  width: 54px;
  height: 36px;
  border-radius: 999px;
  background: #fee2e2;
  color: var(--danger-dark);
  display: inline-grid;
  place-items: center;
  font-size: 13px;
  font-weight: 900;
}

.app-card strong {
  font-size: 20px;
}

.app-card small {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .launcher-shell {
    grid-template-columns: 1fr;
  }

  .launcher-sidebar {
    padding: 18px;
  }

  .launcher-main {
    padding: 22px;
  }

  .app-grid {
    grid-template-columns: 1fr;
  }
}