/* tcpdump filter builder — styles. Uses the tabi theme CSS variables so it
   follows the site's light/dark mode automatically. */
.tdb { font-family: var(--sans-serif-font); }
.tdb__intro { color: var(--meta-color); }

.tdb__diagram { margin: 1.2rem 0; }
.tdb__diagram h3 { margin: 0 0 .4rem; font-size: 1rem; }

/* Bit ruler above each header diagram. */
.tdb__ruler { display: flex; margin-bottom: 2px; }
.tdb__ruler-cell { flex: 1; text-align: center; font-size: 8px; color: var(--meta-color); line-height: 1; }

/* 32-bit header grid. Each field spans its bit width. */
.tdb__grid { display: grid; grid-template-columns: repeat(32, 1fr); gap: 2px; }
.tdb__field {
  background: var(--bg-1);
  border: 1px solid var(--divider-color);
  border-radius: 3px;
  padding: 3px 1px;
  text-align: center;
  font-size: 10px;
  line-height: 1.15;
  cursor: pointer;
  overflow: hidden;
  min-height: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: background .15s, border-color .15s, outline-color .15s;
  user-select: none;
}
/* Zebra striping: adjacent fields alternate so each one is easy to pick out. */
.tdb__field--alt { background: var(--bg-3); }
/* A field that ends exactly at a 32-bit boundary closes a word row, matching
   the RFC's row-per-word layout. A stronger bottom line marks the break. */
.tdb__field--word-end { border-bottom: 2px solid var(--text-color); }
.tdb__field:hover { border-color: var(--primary-color); }
.tdb__field--selected { background: var(--primary-color); border-color: var(--primary-color); color: var(--background-color); }
.tdb__field--set { outline: 2px solid var(--primary-color); outline-offset: 1px; }
.tdb__field-name-row { display: flex; align-items: center; justify-content: center; gap: 3px; }
.tdb__field-name { font-weight: 600; }
.tdb__field-bits { opacity: .65; font-size: 8px; }
.tdb__field-flags { font-size: 8px; letter-spacing: .5px; opacity: .8; }

/* Category dots: a small colored dot marks what kind of field this is. */
.tdb__field-dot { width: 6px; height: 6px; border-radius: 50%; flex: none; }
.tdb__field-dot[data-kind="ip"] { background: #3b82f6; }
.tdb__field-dot[data-kind="port"] { background: #22c55e; }
.tdb__field-dot[data-kind="flags"], .tdb__field-dot[data-kind="tcpflags"] { background: #f59e0b; }
.tdb__field-dot[data-kind="proto"] { background: #a855f7; }
.tdb__field-dot[data-kind="const"] { background: #6b7280; }
.tdb__field-dot[data-kind="int"] { background: var(--meta-color); }

/* Legend for the category dots. */
.tdb__legend { display: flex; flex-wrap: wrap; gap: .4rem 1rem; margin: .4rem 0 .8rem; font-size: .85rem; color: var(--meta-color); }
.tdb__legend-item { display: inline-flex; align-items: center; gap: .35rem; }

/* Field editor panel. */
.tdb__panel {
  margin: 1rem 0;
  padding: .8rem 1rem;
  border: 1px solid var(--divider-color);
  border-radius: 6px;
  background: var(--bg-0);
}
.tdb__panel-head { display: flex; justify-content: space-between; align-items: center; }
.tdb__panel-title { font-weight: 600; }
.tdb__panel-close { background: none; border: none; font-size: 1.2rem; cursor: pointer; color: var(--meta-color); line-height: 1; }
.tdb__panel-close:hover { color: var(--text-color); }
.tdb__panel-desc { margin: .3rem 0 .6rem; color: var(--meta-color); font-size: .9rem; }
.tdb__panel-control { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.tdb__panel-control input[type=number],
.tdb__panel-control input[type=text],
.tdb__panel-control select {
  padding: .3rem .5rem;
  border: 1px solid var(--divider-color);
  border-radius: 4px;
  background: var(--bg-2);
  color: var(--text-color);
  font: inherit;
}
.tdb__panel-error { color: #c0392b; font-size: .85rem; margin: .4rem 0 0; min-height: 1em; }
.tdb__check { display: inline-flex; align-items: center; gap: .3rem; margin-right: .6rem; font-size: .9rem; }

.tdb__btn {
  padding: .35rem .8rem;
  border: 1px solid var(--divider-color);
  border-radius: 4px;
  background: var(--bg-2);
  color: var(--text-color);
  cursor: pointer;
  font: inherit;
}
.tdb__btn:hover { border-color: var(--primary-color); }
.tdb__btn--primary { background: var(--primary-color); border-color: var(--primary-color); color: var(--background-color); }

.tdb__quick { margin: 1.2rem 0; }
.tdb__quick h3, .tdb__conditions h3, .tdb__output h3 { margin: 0 0 .4rem; font-size: 1rem; }
.tdb__quick-row { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; }
.tdb__quick-row input[type=number], .tdb__quick-row select {
  padding: .3rem .5rem;
  border: 1px solid var(--divider-color);
  border-radius: 4px;
  background: var(--bg-2);
  color: var(--text-color);
  font: inherit;
}

.tdb__conditions-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: .4rem; }
.tdb__conditions-head h3 { margin: 0; }
.tdb__chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.tdb__chip {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--bg-1);
  border: 1px solid var(--divider-color);
  border-radius: 999px;
  padding: .2rem .6rem;
  font-size: .85rem;
}
.tdb__chip-x { background: none; border: none; cursor: pointer; color: var(--meta-color); font-size: 1rem; line-height: 1; padding: 0; }
.tdb__chip-x:hover { color: var(--text-color); }
.tdb__empty { color: var(--meta-color); font-size: .9rem; }

.tdb__output { margin: 1.2rem 0; }
.tdb__expr {
  background: var(--codeblock-bg);
  color: #e6e6e6;
  padding: .8rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  font-family: var(--code-font);
  font-size: .9rem;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 2.5em;
}
.tdb__copied { color: var(--primary-color); margin-left: .5rem; font-size: .9rem; }

/* Keep the 32-bit diagram readable on narrow screens. */
@media (max-width: 600px) {
  .tdb__diagram { overflow-x: auto; }
  .tdb__grid, .tdb__ruler { min-width: 560px; }
}