:root {
  --bg: #f3f6fb;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eef3ff;
  --border: #c9d6ee;
  --border-strong: #9db3d9;
  --text: #132136;
  --text-secondary: #43516a;
  --accent: #2a69c7;
  --accent-strong: #1f4f95;
  --prod: #0c9860;
  --dev: #b87000;
  --optional: #6f43bd;
  --danger: #c73a3a;
  --success: #0d7f4f;
  --shadow: 0 14px 32px rgb(19 33 54 / 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d131d;
    --bg-secondary: #131d2b;
    --bg-tertiary: #1a2738;
    --border: #2f4058;
    --border-strong: #476089;
    --text: #e9edf6;
    --text-secondary: #b5c0d8;
    --accent: #6aa8ff;
    --accent-strong: #8abcff;
    --prod: #49d395;
    --dev: #f4ba55;
    --optional: #bb9bff;
    --danger: #ef7a7a;
    --success: #58d39a;
    --shadow: 0 16px 36px rgb(0 0 0 / 0.32);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  background:
    radial-gradient(
      circle at 100% 0%,
      color-mix(in srgb, var(--accent) 22%, transparent),
      transparent 42%
    ),
    radial-gradient(
      circle at 0% 100%,
      color-mix(in srgb, var(--optional) 16%, transparent),
      transparent 44%
    ),
    var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
    Arial, sans-serif;
  line-height: 1.45;
}

.app {
  width: min(100%, 72rem);
  margin-inline: auto;
  padding: 0.85rem;
  display: grid;
  gap: 0.85rem;
}

.hero {
  background: linear-gradient(
    142deg,
    color-mix(in srgb, var(--accent) 25%, var(--bg-secondary)),
    var(--bg-secondary)
  );
  border: 1px solid color-mix(in srgb, var(--border) 78%, var(--accent) 22%);
  border-radius: 0.9rem;
  padding: 1rem;
  box-shadow: var(--shadow);

  & h1 {
    margin: 0;
    font-size: clamp(1.35rem, 4.8vw, 2rem);
    letter-spacing: 0.02em;
  }

  & p {
    margin: 0.35rem 0 0;
    color: var(--text-secondary);
  }
}

.panel {
  background: color-mix(in srgb, var(--bg-secondary) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  padding: 0.85rem;
  box-shadow: var(--shadow);

  & h2 {
    margin: 0;
    font-size: 1.02rem;
    letter-spacing: 0.02em;
  }
}

.loader-grid {
  margin-top: 0.75rem;
  display: grid;
  gap: 0.75rem;
}

.field {
  display: grid;
  gap: 0.4rem;

  & span {
    font-size: 0.84rem;
    color: var(--text-secondary);
    font-weight: 600;
  }

  & input {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 0.7rem;
    background: var(--bg-tertiary);
    color: var(--text);
    padding: 0.62rem 0.74rem;
    font: inherit;
    min-height: 2.55rem;
  }

  & input:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--accent) 56%, transparent);
    outline-offset: 1px;
    border-color: var(--accent);
  }
}

.url-row {
  display: flex;
  gap: 0.55rem;
}

button {
  border: 1px solid var(--border-strong);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 70%, white),
    var(--accent)
  );
  color: white;
  border-radius: 0.7rem;
  padding: 0.62rem 0.9rem;
  min-height: 2.55rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    filter 0.15s ease;
}

button:hover {
  filter: brightness(1.05);
}

button:active {
  transform: translateY(1px);
}

button:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
  outline-offset: 2px;
}

.hint {
  margin: 0.7rem 0 0;
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.status {
  margin: 0.55rem 0 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.status.error {
  color: var(--danger);
}

.status.success {
  color: var(--success);
}

.controls {
  margin-top: 0.8rem;
  display: grid;
  gap: 0.7rem;
}

.search-field {
  max-width: 38rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-chip {
  background: var(--bg-tertiary);
  color: var(--text);
  border-color: var(--border);
  min-height: 2.2rem;
  padding: 0.4rem 0.75rem;
}

.filter-chip.active {
  background: color-mix(in srgb, var(--accent) 90%, white);
  border-color: var(--accent-strong);
  color: white;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.source-info {
  margin: 0.75rem 0;
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.tree {
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  background: color-mix(in srgb, var(--bg-secondary) 92%, transparent);
  padding: 0.55rem;
  max-height: 67dvh;
  overflow: auto;
}

.empty-state {
  padding: 1.25rem 0.9rem;
  text-align: center;
  color: var(--text-secondary);

  & h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--text);
  }

  & p {
    margin: 0.35rem 0 0;
  }
}

.node {
  margin-top: 0.3rem;
}

.node-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--border);
  border-radius: 0.62rem;
  background: color-mix(in srgb, var(--bg-tertiary) 66%, transparent);
  padding: 0.4rem 0.5rem;
}

.toggle-btn {
  min-height: 1.8rem;
  min-width: 1.8rem;
  height: 1.8rem;
  width: 1.8rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text);
  padding: 0;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.toggle-btn.is-leaf {
  border-style: dashed;
  cursor: default;
}

.pkg-name {
  font-weight: 600;
  overflow-wrap: anywhere;
}

.pkg-version {
  color: var(--text-secondary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
}

.badge {
  margin-inline-start: auto;
  border-radius: 999px;
  padding: 0.2rem 0.5rem;
  font-size: 0.72rem;
  border: 1px solid transparent;
  white-space: nowrap;
}

.badge.prod {
  color: var(--prod);
  border-color: color-mix(in srgb, var(--prod) 50%, var(--border));
  background: color-mix(in srgb, var(--prod) 18%, transparent);
}

.badge.dev {
  color: var(--dev);
  border-color: color-mix(in srgb, var(--dev) 50%, var(--border));
  background: color-mix(in srgb, var(--dev) 18%, transparent);
}

.badge.optional {
  color: var(--optional);
  border-color: color-mix(in srgb, var(--optional) 45%, var(--border));
  background: color-mix(in srgb, var(--optional) 17%, transparent);
}

.badge.warn {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 60%, var(--border));
  background: color-mix(in srgb, var(--danger) 13%, transparent);
}

.children {
  border-left: 1px solid color-mix(in srgb, var(--border) 88%, transparent);
  margin-left: 0.52rem;
  padding-left: 0.58rem;
}

@media (min-width: 720px) {
  .app {
    padding: 1.25rem;
    gap: 1rem;
  }

  .panel,
  .hero {
    padding: 1rem 1.1rem;
  }

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

  .controls {
    grid-template-columns: 1fr auto;
    align-items: end;
  }

  .search-field {
    grid-column: 1 / -1;
  }

  .stats {
    justify-content: flex-end;
  }

  .tree {
    max-height: 72dvh;
  }
}