/* pcap-tools.css — TIR-1 Phase-1 Wireshark-style 3-pane UI.
 *
 * Palette B (mirrors wasm-workbench/static/workbench.css).
 * Geist Mono for source/code; system-ui for chrome.
 *
 * Layout: header + filter bar + 3 vertically-stacked resizable panes
 * (packet list / protocol tree / hex dump) + filter-learning sidebar.
 *
 * License: © 2026 Virtus Cyber Academy; license TBD.
 */

:root {
  --bg:        #0a0a0a;
  --fg:        #d0d0d0;
  --muted:     #707070;
  --green:     #4ade80;
  --gold:      #fbbf24;
  --red:       #ef4444;
  --pane-bd:   #2a2a2a;
  --pane-bg:   #131313;
  --code-bg:   #1a1a1a;
  --row-hover: #1f1f1f;
  --row-sel:   #1f3326;
  --mono:      'Geist Mono', 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  /* Wireshark-default protocol palette */
  --col-tcp:   #b8e8b8;
  --col-udp:   #c0d8ff;
  --col-icmp:  #fff5b8;
  --col-arp:   #f0e0a0;
  --col-dns:   #e8c0e8;
  --col-http:  #c0e8e0;
  --col-tls:   #e0c0e0;
}

* { box-sizing: border-box; }

/* Pin the page chrome to the viewport so packet tables and sidebars
 * scroll INSIDE their own panes, not via page-level scroll.  Without
 * this discipline a tall pcap (dozens-to-thousands of rows) pushes
 * header + filter-bar + sidebar off-screen — the bug Jon hit on the
 * live deploy with a real-world capture from samplecaptures.        */
html, body {
  height: 100%;
  overflow: hidden;   /* the body itself never scrolls */
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--pane-bd);
}
header h1 { color: var(--gold); font-size: 1.15rem; margin: 0; }
header .info { color: var(--muted); font-size: 0.85rem; font-family: var(--mono); }

#status {
  color: var(--gold);
  font-size: 0.85rem;
  font-family: var(--mono);
  margin-left: 1rem;
}
#status.ok { color: var(--green); }
#status.fail { color: var(--red); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--pane-bd);
  align-items: center;
  background: var(--pane-bg);
}

.filter-bar input[type=text] {
  flex: 1 1 24rem;
  background: var(--code-bg);
  color: var(--fg);
  border: 1px solid var(--green);
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.45rem 0.6rem;
}
.filter-bar input[type=text]:focus { outline: none; border-color: var(--gold); }
.filter-bar button {
  background: var(--green);
  color: var(--bg);
  border: 0;
  padding: 0.45rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  cursor: pointer;
}
.filter-bar button.secondary {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--pane-bd);
}
.filter-bar input[type=file] { color: var(--fg); font-family: var(--mono); font-size: 0.85rem; }
.filter-bar .match-count {
  font-family: var(--mono); font-size: 0.85rem; color: var(--gold); margin-left: 0.5rem;
}
.filter-bar .syntax-error {
  color: var(--red); font-family: var(--mono); font-size: 0.85rem;
}

main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 22rem;
  gap: 0;
  min-height: 0;          /* let the grid shrink below content */
  overflow: hidden;       /* pane content never bleeds past main */
}

.workspace {
  display: grid;
  grid-template-rows: 1.2fr 1fr 0.8fr;
  gap: 0;
  min-height: 0;          /* same shrink-discipline for nested grid */
  overflow: hidden;
}

.pane {
  background: var(--pane-bg);
  border-bottom: 1px solid var(--pane-bd);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;          /* CRITICAL: grid item must accept shrink
                              below its intrinsic content height,
                              otherwise overflow:auto on .pane-body
                              never engages and the parent stretches. */
}
.pane:last-child { border-bottom: none; }
.pane-header {
  background: var(--code-bg);
  padding: 0.35rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--green);
  border-bottom: 1px solid var(--pane-bd);
  flex: 0 0 auto;         /* fixed-height chrome */
}
.pane-body {
  flex: 1 1 auto;
  overflow: auto;         /* pane-internal scroll */
  min-height: 0;          /* same critical shrink-discipline */
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.4;
}

/* Packet list table */
.packet-list { width: 100%; border-collapse: collapse; }
.packet-list thead {
  position: sticky;
  top: 0;
  background: var(--code-bg);
  z-index: 1;
}
.packet-list th {
  padding: 0.3rem 0.5rem;
  text-align: left;
  color: var(--green);
  font-weight: 500;
  border-bottom: 1px solid var(--pane-bd);
  user-select: none;
}
.packet-list td {
  padding: 0.2rem 0.5rem;
  border-bottom: 1px solid #1a1a1a;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.packet-list tr { cursor: pointer; }
.packet-list tr:hover td { background: var(--row-hover); }
.packet-list tr.selected td { background: var(--row-sel); border-color: var(--green); }
.packet-list .col-frame { width: 4em; color: var(--muted); }
.packet-list .col-ts    { width: 8em; color: var(--muted); }
.packet-list .col-src   { width: 12em; }
.packet-list .col-dst   { width: 12em; }
.packet-list .col-proto { width: 5em; font-weight: bold; }
.packet-list .col-len   { width: 4em; color: var(--muted); }
.packet-list .col-info  { color: var(--fg); }
.packet-list tr.proto-tcp .col-proto  { color: #4ade80; }
.packet-list tr.proto-udp .col-proto  { color: #5fb3ff; }
.packet-list tr.proto-icmp .col-proto { color: #fbbf24; }
.packet-list tr.proto-arp .col-proto  { color: #f0e0a0; }

/* Protocol tree */
.tree-pane { padding: 0.5rem; }
.tree-node { margin-left: 0; }
.tree-children { padding-left: 1rem; border-left: 1px dashed var(--pane-bd); margin-left: 0.5rem; }
.tree-head { color: var(--gold); cursor: pointer; padding: 0.1rem 0; }
.tree-head:hover { color: var(--green); }
.tree-leaf { color: var(--fg); padding: 0.1rem 0; }
.tree-leaf .leaf-name { color: var(--green); }
.tree-leaf .leaf-value { color: var(--fg); margin-left: 0.5rem; }
.tree-leaf .leaf-bytes { color: var(--muted); margin-left: 0.5rem; font-size: 0.7rem; }

/* Hex dump */
.hex-pane {
  padding: 0.5rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  white-space: pre;
}
.hex-line { display: block; }
.hex-line .hex-offset { color: var(--muted); width: 5.5em; display: inline-block; }
.hex-line .hex-bytes  { color: var(--fg);  width: 25em; display: inline-block; }
.hex-line .hex-ascii  { color: var(--green); }
.hex-byte.highlight { background: var(--row-sel); }

/* Filter-learning sidebar (right) */
.sidebar {
  background: var(--pane-bg);
  border-left: 1px solid var(--pane-bd);
  overflow: auto;
  min-height: 0;          /* grid-item shrink (same as .pane) */
  padding: 0.6rem 0.8rem;
}
.sidebar h2 {
  color: var(--gold);
  font-size: 0.9rem;
  margin: 0.2rem 0 0.6rem;
  font-family: system-ui;
}
.sidebar h3 {
  color: var(--green);
  font-size: 0.8rem;
  margin: 0.8rem 0 0.3rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Visualizer component containers */
.va-ast-node { font-family: var(--mono); font-size: 0.78rem; }
.va-ast-head { color: var(--green); padding: 0.05rem 0; }
.va-ast-children { padding-left: 1rem; border-left: 1px dashed var(--pane-bd); margin-left: 0.5rem; }

.va-token-list { list-style: none; padding-left: 0; margin: 0; }
.va-token { padding: 0.25rem 0; border-bottom: 1px solid var(--pane-bd); font-family: var(--mono); font-size: 0.78rem; }
.va-token-text { color: var(--fg); font-weight: bold; }
.va-token-kind { color: var(--muted); font-size: 0.7rem; }
.va-token-meta { color: var(--green); font-size: 0.7rem; padding-left: 0.5rem; }

.va-decision-node { font-family: var(--mono); font-size: 0.78rem; }
.va-decision-head { padding: 0.05rem 0; }
.va-decision-head.va-match { color: var(--green); }
.va-decision-head.va-nomatch { color: var(--red); }
.va-decision-children { padding-left: 1rem; border-left: 1px dashed var(--pane-bd); margin-left: 0.5rem; }
.va-decision-note { color: var(--muted); font-size: 0.7rem; padding-left: 0.7rem; }

.va-explainer-prose { color: var(--fg); font-size: 0.85rem; }
.va-explainer-prose strong { color: var(--gold); }
.va-explainer-detail { color: var(--muted); font-size: 0.75rem; }

.va-recipe-current { color: var(--gold); font-family: var(--mono); font-size: 0.78rem; padding: 0.3rem 0; }
.va-recipe-chapter { color: var(--green); font-family: var(--mono); font-size: 0.7rem; }
.va-recipe-try-header { color: var(--green); padding-top: 0.4rem; font-size: 0.78rem; font-weight: 500; }
.va-recipe-next-list { list-style: none; padding-left: 0; margin: 0.3rem 0 0; }
.va-recipe-next-item { padding: 0.4rem 0; border-bottom: 1px solid var(--pane-bd); }
.va-recipe-next-btn {
  background: var(--code-bg);
  color: var(--green);
  border: 1px solid var(--green);
  padding: 0.25rem 0.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  cursor: pointer;
  text-align: left;
  width: 100%;
}
.va-recipe-next-btn:hover { background: var(--green); color: var(--bg); }
.va-recipe-next-reason { color: var(--muted); font-size: 0.7rem; padding-top: 0.2rem; }

.va-bpf-stub { color: var(--gold); font-style: italic; font-size: 0.78rem; padding: 0.3rem 0; }
.va-bpf-input { background: var(--code-bg); color: var(--fg); padding: 0.5rem; }

/* Tutor-mount placeholders are invisible in Phase-1; visible only when
 * Phase-1.5 tutor module replaces innerHTML. */
.virtus-tutor-mount:empty { display: none; }
.virtus-tutor-mount {
  border-top: 1px dashed var(--gold);
  margin-top: 0.4rem;
  padding-top: 0.3rem;
  color: var(--gold);
  font-size: 0.75rem;
}

/* Mobile fallback — collapse sidebar to bottom; keep pane-isolated
 * scroll (each pane bounded; body itself never scrolls).            */
@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
    grid-template-rows: 2fr 1fr;     /* workspace : sidebar */
  }
  .sidebar {
    border-left: none;
    border-top: 1px solid var(--pane-bd);
  }
  .workspace { grid-template-rows: 1fr 0.8fr 0.6fr; }
}