:root {
  --bg: #0f1115;
  --bg-2: #161a22;
  --bg-3: #1d2330;
  --border: #2a3140;
  --fg: #e6e9ef;
  --fg-dim: #9aa3b2;
  --fg-very-dim: #5b6473;
  --accent: #7aa2ff;
  --accent-warm: #ffb86c;
  --good: #6ee7a3;
  --bad: #ff7a7a;
  --lane-page: #7aa2ff;
  --lane-bff: #b78aff;
  --lane-as: #6ee7a3;
  --lane-aserver: #ffb86c;
  --lane-signicat: #ff7ab6;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

.main { display: flex; flex-direction: column; gap: 20px; min-width: 0; }

.page-header h1 {
  margin: 0 0 4px 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.page-header .sub {
  margin: 0;
  color: var(--fg-dim);
  font-size: 13px;
}

.region-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-very-dim);
  margin: 0 0 8px 0;
}

/* ───────────────────── User view (mock browser) ───────────────────── */

.user-view .browser {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.browser-chrome {
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
}
.dots { display: flex; gap: 6px; }
.dots span {
  width: 11px; height: 11px; border-radius: 50%;
  background: #3a4150;
}
.url-bar {
  flex: 1;
  background: #0c0f15;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.browser-content {
  min-height: 180px;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Three view states */
.view-company-login,
.view-signicat,
.view-logged-in {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
  width: 100%;
}
.view-company-login .logo,
.view-signicat .logo,
.view-logged-in .logo {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.view-company-login .logo { color: #fff; }
.view-signicat .logo { color: #ff7ab6; }
.view-logged-in .logo { color: var(--good); }
.fake-btn {
  background: var(--accent);
  color: #0c0f15;
  border: none;
  border-radius: 6px;
  padding: 8px 18px;
  font-weight: 600;
  font-size: 14px;
  pointer-events: none;
}
.signicat-form {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
}
.signicat-form input {
  background: #0c0f15;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 8px;
  color: var(--fg);
  font-family: var(--mono);
  font-size: 12px;
}
.signicat-form .fake-btn {
  background: #ff7ab6;
  color: #0c0f15;
  width: 100%;
  margin-top: 6px;
}
.view-logged-in .greet { color: var(--fg-dim); }
.view-logged-in .badge {
  display: inline-block;
  background: rgba(110, 231, 163, 0.15);
  color: var(--good);
  border: 1px solid rgba(110, 231, 163, 0.4);
  border-radius: 4px;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 11px;
}

.view-redirecting {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  color: var(--fg-dim);
}
.view-redirecting .spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--bg-3);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
.view-redirecting .redir-line {
  margin: 0;
  font-size: 13px;
  color: var(--fg-dim);
}
.view-redirecting .redir-host {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-very-dim);
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ───────────────────── Lane diagram (SVG) ───────────────────── */

.diagram-region { display: flex; flex-direction: column; }
.diagram-wrap {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  overflow-x: auto;
}
#diagram { display: block; }

.lane-header text { font-size: 11px; font-weight: 600; fill: var(--fg); }
.lane-header .sub { font-size: 9px; fill: var(--fg-very-dim); font-weight: 400; }
.lane-line { stroke: var(--border); stroke-dasharray: 2 4; }

.arrow-line { stroke-width: 2; fill: none; }
.arrow-label { font-family: var(--mono); font-size: 10px; }
.arrow-step-num { font-family: var(--mono); font-size: 9px; font-weight: 600; }

.arrow { cursor: pointer; }
.arrow-hitbox { fill: transparent; }
.arrow:hover .arrow-hitbox { fill: rgba(122, 162, 255, 0.06); }
.arrow.current:hover .arrow-hitbox { fill: rgba(122, 162, 255, 0.10); }

/* arrow states */
.arrow.past .arrow-line   { stroke: #3a4150; opacity: 0.6; }
.arrow.past .arrow-label  { fill: var(--fg-very-dim); opacity: 0.7; }
.arrow.past .arrow-step-num { fill: var(--fg-very-dim); }
.arrow.past .arrow-head   { fill: #3a4150; opacity: 0.6; }

.arrow.future .arrow-line   { stroke: #232a38; stroke-dasharray: 3 5; }
.arrow.future .arrow-label  { fill: #3a4150; }
.arrow.future .arrow-step-num { fill: #3a4150; }
.arrow.future .arrow-head   { fill: #232a38; }

.arrow.current .arrow-line   { stroke: var(--accent); stroke-width: 2.5; }
.arrow.current .arrow-label  { fill: var(--accent); font-weight: 600; }
.arrow.current .arrow-step-num { fill: var(--accent); font-weight: 700; }
.arrow.current .arrow-head   { fill: var(--accent); }

/* kind tints */
.arrow.kind-http-server .arrow-line  { stroke-dasharray: none; }
.arrow.kind-http-internal .arrow-line { stroke-dasharray: 6 3; }
.arrow.kind-internal .arrow-line     { stroke-dasharray: 1 3; }

.arrow.current.kind-http-server .arrow-line { stroke: var(--good); }
.arrow.current.kind-http-server .arrow-label,
.arrow.current.kind-http-server .arrow-step-num { fill: var(--good); }
.arrow.current.kind-http-server .arrow-head { fill: var(--good); }

.arrow.current.kind-http-internal .arrow-line { stroke: var(--accent-warm); }
.arrow.current.kind-http-internal .arrow-label,
.arrow.current.kind-http-internal .arrow-step-num { fill: var(--accent-warm); }
.arrow.current.kind-http-internal .arrow-head { fill: var(--accent-warm); }

.arrow.current.kind-internal .arrow-line { stroke: #b78aff; }
.arrow.current.kind-internal .arrow-label,
.arrow.current.kind-internal .arrow-step-num { fill: #b78aff; }

.legend { font-family: var(--mono); font-size: 10px; fill: var(--fg-dim); }
.legend rect, .legend line { }

/* ───────────────────── Details panel ───────────────────── */

.details-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}
.details-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}
.step-pill {
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
}
#step-title { margin: 0; font-size: 16px; font-weight: 600; }
.narration {
  color: var(--fg-dim);
  margin: 8px 0 14px 0;
  font-size: 13px;
}

.kv-block { margin-top: 10px; }
.kv-block h4 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-very-dim);
  margin: 12px 0 6px 0;
  font-weight: 600;
}
.kv-row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 8px;
  padding: 3px 0;
  font-family: var(--mono);
  font-size: 12px;
  border-bottom: 1px dashed var(--border);
}
.kv-row:last-child { border-bottom: none; }
.kv-key { color: var(--fg-dim); }
.kv-val {
  color: var(--fg);
  word-break: break-all;
  overflow-wrap: anywhere;
}
.kv-val.has-token { cursor: pointer; color: var(--accent); text-decoration: underline; text-decoration-style: dotted; }
.kv-val.has-token:hover { color: var(--accent-warm); }
.kv-note { color: var(--fg-very-dim); font-size: 11px; font-style: italic; margin-left: 6px; }

.kv-val .layer-state { color: #ffb86c; }
.kv-val .layer-nonce { color: #ff7ab6; }
.kv-val .layer-pkce  { color: #6ee7a3; }

.url-pretty { font-family: var(--mono); font-size: 12px; }
.url-pretty .q-key { color: var(--fg-dim); }
.url-pretty .q-eq  { color: var(--fg-very-dim); }

.status-good { color: var(--good); }
.status-info { color: var(--fg-dim); }

/* ───────────────────── Right rail ───────────────────── */

.rail {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 24px;
  align-self: start;
  height: max-content;
}
.rail-section {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.rail-section h4 {
  margin: 0 0 6px 0;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-very-dim);
}
.rail-hint {
  color: var(--fg-very-dim);
  font-size: 11px;
  margin: 0 0 10px 0;
}
.counter {
  color: var(--fg-dim);
  font-size: 12px;
  margin-bottom: 4px;
}
.counter strong { color: var(--fg); font-size: 16px; }
.step-title-rail {
  font-size: 13px;
  color: var(--fg);
  margin: 6px 0 12px 0;
  min-height: 36px;
}
.nav-btns { display: flex; gap: 8px; }
.nav-btns button, .token-btn {
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}
.nav-btns button:hover { border-color: var(--accent); color: var(--accent); }
.nav-btns button:disabled { opacity: 0.4; cursor: not-allowed; }
.hint { font-size: 11px; color: var(--fg-very-dim); margin-top: 8px; }

.rail-section label {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--fg-dim); padding: 3px 0;
  cursor: pointer;
}
.rail-section label code {
  font-family: var(--mono); font-size: 11px;
  background: var(--bg-3); padding: 1px 4px; border-radius: 3px;
}

.token-btn {
  width: 100%;
  text-align: left;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 11px;
}
.token-btn:not(:disabled):hover { border-color: var(--accent); color: var(--accent); }
.token-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.token-btn.compare {
  font-family: inherit;
  font-weight: 600;
}
.token-btn.compare:not(:disabled) {
  border-color: var(--accent-warm);
  color: var(--accent-warm);
}

/* ───────────────────── Modal ───────────────────── */

.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 24px;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 26px;
  max-width: 1100px;
  max-height: 90vh;
  overflow: auto;
  position: relative;
  width: 100%;
}
.modal-close {
  position: absolute; top: 10px; right: 14px;
  background: none; border: none; color: var(--fg-dim);
  font-size: 22px; cursor: pointer; line-height: 1;
}
.modal-close:hover { color: var(--fg); }

.modal h2 { margin: 0 0 16px 0; font-size: 16px; }
.modal h3 { margin: 16px 0 6px 0; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--fg-very-dim); }

.jwt-encoded {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  word-break: break-all;
  white-space: pre-wrap;
  margin: 0;
}
.jwt-encoded .seg-header    { color: #ff7ab6; }
.jwt-encoded .seg-payload   { color: #7aa2ff; }
.jwt-encoded .seg-signature { color: #6ee7a3; }
.jwt-encoded .seg-dot       { color: var(--fg-very-dim); }

.jwt-decoded pre {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
}
.jwt-decoded pre.header  { border-left: 3px solid #ff7ab6; }
.jwt-decoded pre.payload { border-left: 3px solid #7aa2ff; }
.jwt-decoded pre.signature { border-left: 3px solid #6ee7a3; font-style: italic; color: var(--fg-dim); }

.compare-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.compare-col {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}
.compare-col h3 { margin-top: 0; }
.compare-col .col-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-dim);
  margin: 0 0 10px 0;
}
.compare-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 6px;
  padding: 4px 0;
  border-bottom: 1px dashed var(--border);
  font-family: var(--mono);
  font-size: 11px;
}
.compare-row:last-child { border-bottom: none; }
.compare-row .k { color: var(--fg-very-dim); }
.compare-row .v { word-break: break-all; }
.compare-row.diff .v { color: var(--accent-warm); }
.compare-row.diff .k { color: var(--accent-warm); }
.compare-legend {
  margin-top: 12px;
  font-size: 11px;
  color: var(--fg-dim);
  text-align: center;
}
.compare-legend .swatch {
  display: inline-block;
  width: 10px; height: 10px;
  background: var(--accent-warm);
  border-radius: 2px;
  vertical-align: middle;
  margin-right: 4px;
}

.glossary {
  display: grid;
  grid-template-columns: 240px 1fr;
  column-gap: 18px;
  row-gap: 10px;
  margin: 0 0 20px 0;
  padding: 0;
}
.glossary dt {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-warm);
  padding-top: 2px;
  word-break: break-word;
}
.glossary dd {
  margin: 0;
  font-size: 13px;
  color: var(--fg);
  line-height: 1.55;
}
.glossary dd code {
  font-family: var(--mono);
  background: var(--bg-3);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 11px;
  color: var(--accent);
}

@media (max-width: 1100px) {
  .app { grid-template-columns: 1fr; }
  .rail { position: static; }
}