/* TLS 1.3-simulator — mörkt desktop-tema */

:root {
  --bg: #0d1117;
  --panel: #10151c;
  --card: #161d26;
  --card2: #1b232e;
  --border: #2b3440;
  --text: #d6dde6;
  --dim: #8b98a5;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;

  --hs: #58a6ff;
  --hs-enc: #bc8cff;
  --ccs: #768390;
  --app: #3fb950;
  --alert: #f85149;
  --accent: #58a6ff;
  --ok: #3fb950;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  min-width: 1280px;
  height: 100vh;
  overflow: hidden auto; /* horisontell scroll vid smalt fönster, aldrig vertikal sidscroll */
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
}

body.dragging-insp {
  user-select: none;
  cursor: ns-resize;
}

button {
  font: inherit;
  color: var(--text);
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.primary { background: #1f4b8f; border-color: #2f6fd0; }
button.primary:hover:not(:disabled) { background: #245aab; }
button.wide { width: 100%; margin-bottom: 8px; }

input, select, textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
}
textarea { width: 100%; font-family: var(--mono); font-size: 12px; resize: vertical; }

.dim { color: var(--dim); font-weight: normal; }

/* ---------- Header ---------- */

#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: baseline; gap: 10px; }
.brand h1 { margin: 0; font-size: 18px; white-space: nowrap; }
.brand .subtitle { color: var(--dim); font-size: 12px; }

.about { position: relative; }
.about summary {
  list-style: none;
  cursor: pointer;
  color: var(--dim);
  font-size: 12px;
  white-space: nowrap;
}
.about summary::-webkit-details-marker { display: none; }
.about summary:hover { color: var(--accent); }
.about-pop {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 60;
  width: 400px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--dim);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55);
}

.controls { display: flex; align-items: flex-end; gap: 12px; }
.ctl { display: flex; flex-direction: column; gap: 2px; }
.ctl > label { font-size: 11px; color: var(--dim); }

.segmented { display: flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.segmented button { border: 0; border-radius: 0; padding: 6px 14px; background: var(--card); }
.segmented button.active { background: #1f4b8f; }

#btn-next-step { background: #7a4b1f; border-color: #d0872f; }
#btn-next-step:hover:not(:disabled) { background: #925a24; }

/* ---------- Kolumnlayout ---------- */

main {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 350px minmax(560px, 1fr) 350px;
  /* Lås raden till exakt tillgänglig höjd — annars växer kolumnerna med sitt
     innehåll och paketlistan kan aldrig tvingas krympa. */
  grid-template-rows: minmax(0, 1fr);
}

.panel {
  padding: 12px;
  overflow-y: auto;
  background: var(--panel);
}
#client-panel { border-right: 1px solid var(--border); }
#server-panel { border-left: 1px solid var(--border); }

.panel h2 { margin: 0 0 10px; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-client { background: var(--hs); }
.dot-server { background: var(--app); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
}
.card h3 { margin: 0 0 8px; font-size: 13px; }
.card summary { cursor: pointer; font-weight: 600; }

.state-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
}
.badge.state { background: var(--card2); border: 1px solid var(--border); }
.badge.state.st-connected { background: #12351c; border-color: var(--ok); color: var(--ok); }
.badge.state.st-failed { background: #3d1512; border-color: var(--alert); color: var(--alert); }
.badge.state.st-busy { background: #10304f; border-color: var(--hs); color: var(--hs); }

.params { display: grid; grid-template-columns: 96px 1fr; gap: 3px 8px; margin: 0; font-size: 12px; }
.params dt { color: var(--dim); }
.params dd { margin: 0; overflow-wrap: anywhere; }

.secrets { margin: 8px 0 0; font-size: 11px; }
.secrets dt { color: var(--hs-enc); margin-top: 6px; }
.secrets dd { margin: 0; font-family: var(--mono); overflow-wrap: anywhere; color: var(--dim); }
.empty { font-style: italic; }

.addressbar { display: flex; align-items: center; gap: 6px; margin-bottom: 8px; }
.addressbar input { flex: 1; font-family: var(--mono); font-size: 12px; }
#client-lock { font-size: 15px; }

.btnrow { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.btnrow .preset { font-family: var(--mono); font-size: 12px; padding: 4px 8px; }

.output {
  max-height: 220px;
  overflow-y: auto;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.output .entry { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; }
.output .entry .head { font-weight: 600; margin-bottom: 2px; }
.output .entry .head.ok { color: var(--ok); }
.output .entry .head.err { color: var(--alert); }
.output .entry pre {
  margin: 4px 0 0;
  font-family: var(--mono);
  font-size: 11px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 120px;
  overflow-y: auto;
  color: var(--dim);
}

.rawsend label { display: block; font-size: 12px; color: var(--dim); margin-bottom: 4px; }
.rawsend button { margin-top: 6px; }

.config .cfg-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-size: 12px; flex-wrap: wrap; }
.config .cfg-row input[type="text"], .config .cfg-row input:not([type]) { flex: 1; }
.config .hint { font-size: 11px; color: var(--dim); margin: 6px 0 0; }

/* ---------- Nätverkspanelen ---------- */

#network-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--bg);
}

.net-header {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px 6px;
}
.net-header h2 { margin: 0; font-size: 15px; }
.legend { display: flex; gap: 6px; }

.chip {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid;
}
.chip.cat-hs, .badge.cat-hs { color: var(--hs); border-color: var(--hs); background: rgba(88, 166, 255, 0.12); }
.chip.cat-hs-enc, .badge.cat-hs-enc { color: var(--hs-enc); border-color: var(--hs-enc); background: rgba(188, 140, 255, 0.12); }
.chip.cat-ccs, .badge.cat-ccs { color: var(--ccs); border-color: var(--ccs); background: rgba(118, 131, 144, 0.12); }
.chip.cat-app, .badge.cat-app { color: var(--app); border-color: var(--app); background: rgba(63, 185, 80, 0.12); }
.chip.cat-alert, .badge.cat-alert { color: var(--alert); border-color: var(--alert); background: rgba(248, 81, 73, 0.12); }
.badge[class*="cat-"] { border: 1px solid; }

#step-info {
  flex-shrink: 0;
  margin: 0 12px 6px;
  padding: 8px 10px;
  border: 1px solid #d0872f;
  background: rgba(208, 135, 47, 0.1);
  border-radius: 6px;
  font-size: 12px;
}
#step-info b { margin-right: 8px; }
#step-info.failed { border-color: var(--alert); background: rgba(248, 81, 73, 0.1); }
#step-info.done { border-color: var(--ok); background: rgba(63, 185, 80, 0.1); }

.pkt {
  display: grid;
  grid-template-columns: 36px 68px 56px 118px 1fr 64px;
  gap: 8px;
  padding: 4px 12px;
  align-items: baseline;
  font-size: 12px;
}
.pkt-head {
  flex-shrink: 0;
  color: var(--dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
}

#packet-list { flex: 1; min-height: 40px; overflow-y: auto; }

#packet-list .pkt {
  cursor: pointer;
  border-left: 3px solid transparent;
  font-family: var(--mono);
}
#packet-list .pkt:hover { background: var(--card); }
#packet-list .pkt.selected { background: var(--card2); }
#packet-list .pkt.cat-hs { border-left-color: var(--hs); }
#packet-list .pkt.cat-hs-enc { border-left-color: var(--hs-enc); }
#packet-list .pkt.cat-ccs { border-left-color: var(--ccs); }
#packet-list .pkt.cat-app { border-left-color: var(--app); }
#packet-list .pkt.cat-alert { border-left-color: var(--alert); }
.pkt .c-id, .pkt .c-time, .pkt .c-len { color: var(--dim); }
.pkt .c-desc { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pkt .c-dir { font-weight: 600; }
.pkt .c-dir.dir-client { color: var(--hs); }
.pkt .c-dir.dir-server { color: var(--app); }

/* ---------- Inspektören ---------- */

#insp-divider {
  flex-shrink: 0;
  height: 7px;
  cursor: ns-resize;
  background: var(--border);
  border-top: 1px solid var(--bg);
  position: relative;
}
#insp-divider::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 2px;
  transform: translateX(-50%);
  width: 46px;
  height: 3px;
  border-radius: 2px;
  background: var(--dim);
}
#insp-divider:hover, body.dragging-insp #insp-divider { background: #33506f; }
#insp-divider:hover::after, body.dragging-insp #insp-divider::after { background: var(--accent); }

#inspector {
  height: 44%;
  min-height: 120px;
  flex-shrink: 0;
  display: flex;
  overflow: hidden;
  background: var(--panel);
}

#insp-main {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  padding: 10px 12px;
}

#insp-explain {
  width: 350px;
  flex-shrink: 0;
  overflow-y: auto;
  border-left: 1px solid var(--border);
  background: var(--card);
  padding: 10px 14px;
}
#insp-explain[hidden] { display: none; }

.explain-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}
.explain-head h3 { margin: 0 0 4px; font-size: 13px; color: var(--hs); }
.explain-close {
  border: none;
  background: none;
  color: var(--dim);
  font-size: 16px;
  line-height: 1;
  padding: 0 2px;
  cursor: pointer;
}
.explain-close:hover { color: var(--alert); }
.explain-value {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  margin: 6px 0 8px;
  overflow-wrap: anywhere;
  max-height: 72px;
  overflow-y: auto;
}
#insp-explain p { margin: 0 0 8px; font-size: 12px; line-height: 1.55; }

.placeholder { color: var(--dim); font-style: italic; padding: 12px; }

/* ---------- Nyckelutbytesmodalen ---------- */

#dh-modal { position: fixed; inset: 0; z-index: 100; }
#dh-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.65); }

#dh-panel {
  position: absolute;
  inset: 4vh 50% auto auto;
  transform: translateX(50%);
  width: min(1180px, 94vw);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.dh-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
  flex-shrink: 0;
}
.dh-head h2 { margin: 0; font-size: 16px; flex: 1; }
#dh-close {
  border: none;
  background: none;
  font-size: 18px;
  color: var(--dim);
  padding: 2px 6px;
}
#dh-close:hover { color: var(--alert); }

#dh-body { overflow-y: auto; padding: 14px 16px; }

.dh-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr 1fr;
  gap: 10px;
  align-items: stretch;
}

.dh-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 12px;
}
.dh-card h3 { margin: 0 0 8px; font-size: 13px; }
.dh-client { border-top: 3px solid var(--hs); }
.dh-server { border-top: 3px solid var(--app); }
.dh-params, .dh-channel, .dh-equal { border-top: 3px solid var(--hs-enc); }
.dh-kc { border-top: 3px solid var(--hs); }
.dh-ks { border-top: 3px solid var(--app); }
.dh-hkdf { margin-top: 10px; border-top: 3px solid var(--alert); }

.dh-step { display: flex; gap: 8px; align-items: baseline; margin-top: 8px; font-weight: 600; }
.dh-stepnum { color: var(--hs-enc); }

.dh-formula {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  margin: 6px 0;
  white-space: pre-wrap;
}

.dh-note { color: var(--dim); font-size: 11px; margin: 5px 0; line-height: 1.5; }
.dh-waiting { color: var(--dim); font-style: italic; padding: 10px 4px; }

.dh-valrow { display: flex; flex-direction: column; gap: 3px; margin: 8px 0; }
.dh-vallabel { font-family: var(--mono); font-size: 12px; }

/* Reveal-chips */
.reveal {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  border: 1px dashed;
  border-radius: 6px;
  padding: 4px 8px;
  margin: 4px 0;
  cursor: pointer;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  user-select: text;
}
.reveal:not(.shown) { font-style: italic; }
.reveal.sec { color: #ff8f88; border-color: #a03c36; background: rgba(248, 81, 73, 0.08); }
.reveal.pub-c { color: var(--hs); border-color: #2f5f9e; background: rgba(88, 166, 255, 0.08); }
.reveal.pub-s { color: var(--app); border-color: #2f7a42; background: rgba(63, 185, 80, 0.08); }
.reveal.pub { color: var(--text); border-color: var(--border); background: var(--bg); }
.reveal.shown { border-style: solid; font-style: normal; }

/* Pilar i publika kanalen */
.dh-arrow {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 6px;
  margin: 4px 0;
}
.dh-arrow-right { color: var(--hs); background: rgba(88, 166, 255, 0.1); text-align: left; }
.dh-arrow-left { color: var(--app); background: rgba(63, 185, 80, 0.1); text-align: right; }
.dh-arrow.dim { opacity: 0.35; font-weight: 400; }

.dh-eqbig { font-size: 18px; font-weight: 700; text-align: center; margin: 8px 0; }
.dh-eqbig.ok { color: var(--ok); }
.dh-eqbig.bad { color: var(--alert); }

/* HKDF-kedjan */
.dh-chain { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 6px 0; }
.dh-chainitem { display: flex; flex-direction: column; gap: 2px; max-width: 220px; }
.dh-chainitem .reveal { margin: 0; max-height: 52px; overflow-y: auto; }
.dh-chainlabel { font-size: 11px; color: var(--dim); }
.dh-chainstart { font-family: var(--mono); font-weight: 700; font-size: 14px; color: #ff8f88; }
.dh-chainarrow { color: var(--dim); font-weight: 700; }

.insp-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.insp-title { font-weight: 700; }
.insp-meta { color: var(--dim); font-size: 12px; }
.insp-summary { color: var(--dim); font-size: 12px; margin-top: 4px; }

.insp-section-title {
  margin: 12px 0 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--dim);
  border-bottom: 1px solid var(--border);
  padding-bottom: 3px;
}
.insp-section-title .hint {
  font-weight: normal;
  text-transform: none;
  letter-spacing: normal;
  font-style: italic;
}

.tree-node { padding-left: calc(var(--depth, 0) * 0px); }
.tree-children { margin-left: 16px; border-left: 1px solid var(--border); padding-left: 10px; }
.tree-row { padding: 1px 4px; font-size: 12px; border-radius: 4px; }
.tree-row.explainable { cursor: pointer; }
.tree-row.explainable .tree-label {
  text-decoration: underline dotted;
  text-underline-offset: 3px;
  text-decoration-color: rgba(88, 166, 255, 0.55);
}
.tree-row.explainable:hover { background: var(--card2); }
.tree-row.explaining { background: #10304f; outline: 1px solid var(--hs); }
.tree-label { color: var(--hs); font-weight: 600; margin-right: 8px; }
.tree-label::after { content: ":"; color: var(--dim); }
.tree-value { font-family: var(--mono); overflow-wrap: anywhere; }
.tree-note { color: var(--dim); font-style: italic; margin-left: 8px; font-size: 11px; }
.tree-pre {
  margin: 2px 0;
  font-family: var(--mono);
  font-size: 11px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
}

.hexdump {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.5;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  overflow-x: auto;
  color: var(--dim);
}