:root {
  --bg: #1d1f21;
  --panel: #2b2e30;
  --accent: #ff9b29;
  --text: #e8e8e8;
  --muted: #9aa0a6;
  --border: #3c4043;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---- Shared layout: top bar + nav ---------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand h1 { margin: 0; color: var(--accent); font-size: 1.4rem; }

.nav {
  display: flex;
  gap: 0.5rem;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.9rem;
}

.nav a:hover { background: rgba(255, 255, 255, 0.05); }

.nav a.active {
  color: var(--accent);
  border-color: var(--border);
  background: var(--bg);
}

.nav-user {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.85rem;
  align-self: center;
  text-decoration: none;
}
.nav-user:hover { color: var(--accent); }

/* ---- Login gate ---------------------------------------------------------- */

.login-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem 1.75rem;
  width: min(380px, 100%);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.login-card h1 { margin: 0; color: var(--accent); font-size: 1.4rem; }
.login-card label { gap: 0.3rem; }
.login-card input { padding: 0.5rem; }
.login-card button[type="submit"] { margin-top: 0.4rem; padding: 0.6rem; }
.login-note { margin: 0.25rem 0 0; font-size: 0.78rem; }

#view { padding: 1rem 2rem 2rem; }

/* Pages are swapped by the hash router. */
.page { display: none; }
.page.active { display: block; }

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-head h2 { margin: 0.25rem 0; }

/* ---- "New" dropdown menu ------------------------------------------------- */

.menu { position: relative; }

.menu-items {
  position: absolute;
  top: calc(100% + 0.3rem);
  left: 0;
  z-index: 20;
  min-width: 12rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.menu-items button {
  background: transparent;
  color: var(--text);
  text-align: left;
  font-weight: 500;
  padding: 0.45rem 0.6rem;
  border-radius: 4px;
}

.menu-items button:hover { background: rgba(255, 255, 255, 0.06); filter: none; }

/* ---- Panels & form controls ---------------------------------------------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
}

.panel h2 { margin-top: 0; }

textarea {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  background: #15171a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
}

.row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
  margin: 0.6rem 0;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

input, select {
  background: #15171a;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.5rem;
}

button {
  background: var(--accent);
  color: #1d1f21;
  border: none;
  border-radius: 6px;
  padding: 0.5rem 1rem;
  font-weight: 600;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

button.danger { background: #cc3b3b; color: #fff; }

button:hover { filter: brightness(1.1); }

.summary {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: #15171a;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.summary h3 { margin: 0 0 0.5rem; color: var(--accent); }

.entity-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
  max-height: 220px;
  overflow-y: auto;
}

.entity-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.15rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.entity-list .count { color: var(--accent); font-variant-numeric: tabular-nums; }

pre {
  background: #15171a;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem;
  overflow-x: auto;
  font-size: 0.8rem;
  max-height: 320px;
}

details summary { cursor: pointer; color: var(--muted); margin-top: 0.5rem; }

footer {
  padding: 0.5rem 2rem 1.5rem;
  color: var(--muted);
  min-height: 1.5rem;
}

.hidden { display: none; }
.error { color: #ff6b6b; }
.muted { color: var(--muted); font-size: 0.85rem; }

/* ---- Preview (reusable component) ---------------------------------------- */

.preview-canvas {
  width: 100%;
  height: 440px;
  display: block;
  background: #15171a;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.preview-hover {
  height: 1.2rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 0.5rem;
  font-size: 0.8rem;
}

.legend-item { display: inline-flex; align-items: center; gap: 0.35rem; }

.legend .swatch {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 3px;
  border: 1px solid rgba(0, 0, 0, 0.4);
}

/* ---- Composer autocomplete ----------------------------------------------- */

.autocomplete {
  position: fixed;
  z-index: 50;
  display: none;
  min-width: 12rem;
  max-height: 13rem;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.ac-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
}

.ac-item.sel,
.ac-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.ac-text {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
}

.ac-hint {
  color: var(--muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

code {
  background: #15171a;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05rem 0.3rem;
  font-size: 0.8rem;
}

/* ---- Library list page --------------------------------------------------- */

.entry-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1rem;
}

.entry-card {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.entry-card:hover { border-color: var(--accent); }

.entry-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.entry-body { padding: 0.6rem 0.8rem; }

.entry-title { font-weight: 600; }
.entry-sub { color: var(--muted); font-size: 0.8rem; margin-top: 0.15rem; }
.entry-sub .tags { color: var(--accent); }

.entry-actions {
  display: flex;
  gap: 0.5rem;
  padding: 0 0.8rem 0.8rem;
  margin-top: auto;
}

.entry-actions button { flex: 1; padding: 0.35rem 0.7rem; font-size: 0.8rem; }

/* Compact preview used as a library thumbnail. */
.preview.thumb { background: #15171a; border-bottom: 1px solid var(--border); }

.thumb .preview-canvas {
  height: 150px;
  border: none;
  border-radius: 0;
}

.thumb .preview-empty {
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb .preview-hover,
.thumb .preview-legend { display: none; }

/* ---- Detail card page ---------------------------------------------------- */

.back {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.back:hover { color: var(--accent); }

.detail-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

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

.detail-main h2 { margin: 0 0 0.5rem; color: var(--accent); }

.chips, .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.5rem 0;
}

.chip {
  background: #15171a;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.chip-composed {
  color: var(--accent);
  border-color: var(--accent);
}

.tag {
  background: rgba(255, 155, 41, 0.12);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  font-size: 0.75rem;
  color: var(--accent);
}

#detail-string { min-height: 90px; }
#detail-source { min-height: 140px; }

/* ---- Generate helper (collapsible, on the detail/draft editor) ----------- */

.gen-helper {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  margin: 0.6rem 0;
}
.gen-helper > summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.9rem;
}
.gen-helper[open] > summary { margin-bottom: 0.5rem; }

/* ---- Ports editor -------------------------------------------------------- */

.ports { margin: 0.75rem 0; }
.ports-title { margin: 0 0 0.5rem; font-size: 1rem; color: var(--accent); }

.port-rows { display: grid; gap: 0.4rem; }

.port-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.port-row .port-name { width: 8rem; }
.port-row .port-signal { flex: 1; min-width: 7rem; }
.port-row .port-lane { width: 6rem; }
.port-row .port-pos { font-size: 0.75rem; white-space: nowrap; }
.port-row button.danger { padding: 0.25rem 0.5rem; }

.port-actions { margin-top: 0.6rem; }

.port-sugs { gap: 0.4rem; }
.port-sug { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

button.link {
  background: none;
  border: none;
  color: var(--accent);
  padding: 0;
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

/* ---- Version history ----------------------------------------------------- */

.versions { margin-top: 0.75rem; }

.version-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
  display: grid;
  gap: 0.4rem;
}

.version-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.65rem;
  background: #15171a;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.version-meta { flex: 1; min-width: 0; }
.version-meta .sub { display: block; }

.version-tag {
  display: inline-block;
  background: var(--border);
  border-radius: 4px;
  padding: 0 0.4rem;
  margin-right: 0.4rem;
  font-variant-numeric: tabular-nums;
}

.version-row button { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

/* ---- Modal dialogs ------------------------------------------------------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  width: min(420px, 100%);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}

.modal-msg { margin: 0 0 0.75rem; }

.modal-input {
  width: 100%;
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}