:root {
  color-scheme: dark;
  --black: #040706;
  --ink: #07100f;
  --panel: rgba(5, 12, 11, 0.91);
  --panel-deep: rgba(2, 7, 7, 0.97);
  --line: rgba(179, 210, 202, 0.24);
  --line-strong: rgba(189, 221, 213, 0.48);
  --paper: #d9d6c9;
  --muted: #8d9994;
  --cyan: #8bc8c4;
  --cyan-dim: #416c69;
  --amber: #c8baa0;
  --danger: #b48577;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.64);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html,
body {
  min-width: 320px;
  height: 100%;
  margin: 0;
  background: var(--black);
  color: var(--paper);
}

body { height: var(--app-height, 100dvh); overflow: hidden; }

button,
textarea { font: inherit; }

.experience {
  position: relative;
  height: var(--app-height, 100dvh);
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  padding: clamp(18px, 2.7vw, 44px);
  overflow: hidden;
  isolation: isolate;
}

.scene,
.scene-wash {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

.scene {
  z-index: -3;
  object-fit: cover;
  object-position: 35% center;
  filter: saturate(0.78) brightness(0.72) contrast(1.04);
}

.scene-wash {
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(2, 5, 5, 0.06) 0%, rgba(2, 6, 6, 0.22) 38%, rgba(2, 7, 7, 0.88) 68%, #020505 100%),
    linear-gradient(0deg, rgba(0, 0, 0, 0.64), transparent 38%, rgba(0, 0, 0, 0.3));
}

.masthead {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.visiting-mark {
  width: clamp(210px, 24vw, 390px);
  height: auto;
  filter: drop-shadow(0 3px 18px rgba(0, 0, 0, 0.6));
}

.prototype-mark {
  display: flex;
  gap: 18px;
  padding-top: 6px;
  color: var(--muted);
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}

.terminal {
  position: relative;
  width: min(920px, 64vw);
  min-height: 0;
  margin: clamp(8px, 1.4vh, 18px) 0 0 auto;
  align-self: stretch;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto auto auto;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, var(--panel), var(--panel-deep));
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255, 255, 255, 0.025);
  backdrop-filter: blur(10px);
}

.terminal::before {
  content: "";
  position: absolute;
  width: 72px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(139, 200, 196, 0.52);
}

.terminal-header {
  display: grid;
  grid-template-columns: minmax(230px, 0.9fr) minmax(350px, 1.4fr);
  gap: 24px;
  padding: 18px 22px 16px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.terminal h1,
.connection-grid dt,
.composer-block label,
.signal-card figcaption,
.site-footer a {
  font-family: Consolas, "Courier New", monospace;
  letter-spacing: 0.14em;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--cyan);
  font-size: 0.72rem;
}

.terminal h1 {
  margin: 0;
  font-size: clamp(1rem, 1.35vw, 1.28rem);
  font-weight: 500;
  line-height: 1.25;
}

.connection-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 0.8fr;
  gap: 18px;
  margin: 0;
}

.connection-grid div { min-width: 0; }
.connection-grid dt { color: var(--muted); font-size: 0.62rem; }
.connection-grid dd {
  margin: 6px 0 0;
  color: var(--paper);
  overflow: hidden;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.79rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-lamp {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.status-lamp.is-error { background: var(--danger); box-shadow: 0 0 8px var(--danger); }

.transcript {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  overflow-anchor: auto;
  touch-action: pan-y;
  scrollbar-color: var(--cyan-dim) transparent;
  padding: 10px 22px 12px;
  background:
    repeating-linear-gradient(0deg, transparent 0, transparent 39px, rgba(172, 204, 196, 0.035) 40px),
    rgba(0, 4, 4, 0.38);
}

.transcript-rule {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 32px;
  color: #63716d;
  font: 0.65rem/1.4 Consolas, "Courier New", monospace;
  letter-spacing: 0.12em;
}

.transcript-rule::before,
.transcript-rule::after { content: ""; height: 1px; flex: 1; background: rgba(133, 162, 155, 0.14); }

.entry {
  position: relative;
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr) 60px;
  gap: 14px;
  padding: 13px 0 15px;
  border-bottom: 1px solid rgba(175, 204, 197, 0.1);
}

.entry-source,
.entry-time {
  padding-top: 3px;
  color: var(--muted);
  font: 0.67rem/1.5 Consolas, "Courier New", monospace;
  letter-spacing: 0.08em;
}

.entry-meta { display: flex; align-items: flex-start; justify-content: flex-end; gap: 7px; min-width: 0; }
.entry-time { text-align: right; }
.entry p { margin: 0; font-size: 1rem; line-height: 1.55; }
.entry.entity p { color: #e5e0d2; font-family: Georgia, "Times New Roman", serif; font-size: 1.06rem; }
.entry.entity .entry-source { color: var(--cyan); }
.entry.visitor p { color: #aeb8b3; }
.entry.pending { opacity: 0.55; }

.flag-tools { position: relative; display: flex; align-items: center; gap: 5px; }
.flag-button {
  width: 24px;
  height: 24px;
  min-height: 24px;
  flex: 0 0 24px;
  justify-content: center;
  padding: 0;
  border-color: transparent;
  background: transparent;
  color: #667773;
  font: 0.9rem/1 "Segoe UI Symbol", sans-serif;
  letter-spacing: 0;
}
.flag-button:hover,
.flag-button:focus-visible { border-color: var(--cyan-dim); color: var(--cyan); background: rgba(71, 119, 114, .14); }
.flag-button.is-flagged { color: var(--cyan); border-color: rgba(139, 200, 196, .32); }
.flag-state {
  max-width: 72px;
  overflow: hidden;
  color: #71827d;
  font: .5rem/1.2 Consolas, monospace;
  letter-spacing: .06em;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.flag-state[hidden] { display: none; }
.flag-menu {
  position: fixed;
  z-index: 8;
  top: 0;
  left: 0;
  width: min(250px, calc(100vw - 48px));
  padding: 7px;
  border: 1px solid var(--line-strong);
  background: rgba(2, 8, 7, .99);
  box-shadow: 0 12px 30px rgba(0,0,0,.55);
}
.flag-menu[hidden] { display: none; }
.flag-menu button {
  width: 100%;
  min-height: 32px;
  margin: 0;
  justify-content: flex-start;
  border-color: transparent;
  background: transparent;
  padding: 7px 8px;
  color: #aab6b1;
  font-size: .59rem;
  line-height: 1.25;
  letter-spacing: .08em;
}
.flag-menu button[hidden] { display: none !important; }
.flag-menu button:hover,
.flag-menu button:focus-visible { border-color: var(--cyan-dim); background: rgba(71,119,114,.18); }
.flag-category-good_response { color: var(--cyan) !important; }
.flag-remove { margin-top: 5px !important; border-top: 1px solid var(--line) !important; color: var(--danger) !important; }
.flag-note-editor { display: grid; grid-template-columns: 1fr auto; gap: 6px; padding: 6px 0; }
.flag-note-editor[hidden] { display: none; }
.flag-note-editor input {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 0;
  outline: none;
  background: #020706;
  color: var(--paper);
  padding: 7px 8px;
  font-size: .75rem;
}
.flag-note-editor button { width: auto; min-height: 32px; border-color: var(--cyan-dim); }

.response-status {
  min-height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 22px;
  border-top: 1px solid rgba(179, 210, 202, 0.13);
  background: rgba(2, 7, 7, 0.82);
  color: var(--cyan);
  font: 0.63rem/1 Consolas, "Courier New", monospace;
  letter-spacing: 0.11em;
}

.typing-indicator { display: flex; align-items: center; gap: 9px; }
.typing-indicator[hidden] { display: none; }
.typing-dots { display: inline-flex; gap: 4px; }
.typing-dots i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--cyan);
  animation: typingDot 1.2s infinite ease-in-out;
}
.typing-dots i:nth-child(2) { animation-delay: 0.16s; }
.typing-dots i:nth-child(3) { animation-delay: 0.32s; }

.new-message-button {
  min-height: 22px;
  margin-left: auto;
  padding: 4px 8px;
  font-size: 0.58rem;
}
.new-message-button[hidden] { display: none; }

.composer-block {
  padding: 14px 22px 16px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(2, 7, 7, 0.65);
}

.composer-block label {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.66rem;
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 142px;
  gap: 10px;
  margin-top: 8px;
}

textarea {
  width: 100%;
  min-height: 58px;
  max-height: 132px;
  resize: vertical;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  outline: none;
  background: rgba(0, 4, 4, 0.76);
  color: var(--paper);
  padding: 12px 13px;
  font-size: 1rem;
  line-height: 1.4;
}

textarea::placeholder { color: #66716d; }
textarea:focus { border-color: var(--cyan); box-shadow: inset 3px 0 0 var(--cyan-dim); }
textarea:disabled { opacity: 0.55; }

button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--cyan-dim);
  border-radius: 0;
  background: rgba(51, 92, 88, 0.22);
  color: #dfe6e1;
  padding: 0 14px;
  cursor: pointer;
  font: 0.76rem/1 Consolas, "Courier New", monospace;
  letter-spacing: 0.12em;
}

button:hover:not(:disabled),
button:focus-visible:not(:disabled) { border-color: var(--cyan); background: rgba(71, 119, 114, 0.34); }
button:disabled { cursor: not-allowed; opacity: 0.42; }
.button-code { color: var(--cyan); font-size: 0.63rem; }

.terminal-note { margin: 8px 0 0; color: #707c78; font-size: 0.72rem; line-height: 1.4; }

.signals {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
}

.signal-card { margin: 0; padding: 11px 14px 8px; background: rgba(3, 9, 9, 0.94); min-width: 0; }
.signal-card figcaption { display: flex; justify-content: space-between; color: var(--muted); font-size: 0.62rem; }
.signal-card figcaption span:last-child { color: var(--cyan); }
.signal-eeg figcaption span:last-child { color: var(--amber); }
.signal-window { position: relative; height: 52px; overflow: hidden; display: flex; align-items: center; }
.signal-window img { display: block; width: 100%; height: 70px; object-fit: fill; }
.signal-base { opacity: 0.54; }
.signal-overlay { position: absolute; inset: 50% 0 auto; transform: translateY(-50%); pointer-events: none; }
.ecg-pulse {
  opacity: 0;
  clip-path: inset(0 50% 0 50%);
  animation: ecgDevelop 4.4s infinite cubic-bezier(.3,.02,.2,1);
}
.eeg-drift { opacity: 0; animation: eegIrregularA 7.3s infinite steps(9, end); }
.eeg-drift-b { animation-name: eegIrregularB; animation-duration: 10.7s; animation-delay: -3.2s; }

@keyframes typingDot {
  0%, 65%, 100% { opacity: .28; transform: translateY(0); }
  28% { opacity: 1; transform: translateY(-2px); }
}

@keyframes ecgDevelop {
  0%, 12% { opacity: 0; clip-path: inset(0 50% 0 50%); }
  22% { opacity: .92; clip-path: inset(0 40% 0 40%); }
  38% { opacity: .92; clip-path: inset(0 17% 0 17%); }
  57% { opacity: .76; clip-path: inset(0 0 0 0); }
  72%, 100% { opacity: 0; clip-path: inset(0 0 0 0); }
}

@keyframes eegIrregularA {
  0% { opacity: .1; clip-path: inset(0 82% 0 0); transform: translate(-.4%, -50%); }
  19% { opacity: .34; clip-path: inset(0 56% 0 18%); }
  43% { opacity: .2; clip-path: inset(0 31% 0 39%); transform: translate(.3%, -50%); }
  71% { opacity: .38; clip-path: inset(0 9% 0 68%); }
  100% { opacity: .1; clip-path: inset(0 0 0 91%); transform: translate(-.2%, -50%); }
}

@keyframes eegIrregularB {
  0% { opacity: .22; clip-path: inset(0 67% 0 12%); }
  27% { opacity: .1; clip-path: inset(0 44% 0 34%); transform: translate(.45%, -50%); }
  61% { opacity: .3; clip-path: inset(0 18% 0 61%); }
  100% { opacity: .12; clip-path: inset(0 73% 0 8%); transform: translate(-.35%, -50%); }
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  width: min(920px, 64vw);
  margin: 10px 0 0 auto;
}

.site-footer img { width: 116px; height: auto; opacity: 0.72; }
.site-footer a { color: #74817d; font-size: 0.6rem; text-decoration: none; }
.site-footer a:hover,
.site-footer a:focus-visible { color: var(--cyan); }

@media (max-width: 1100px) {
  .scene { object-position: 28% center; }
  .scene-wash { background: linear-gradient(90deg, rgba(1, 4, 4, 0.2), rgba(2, 7, 7, 0.8) 52%, #020505); }
  .terminal,
  .site-footer { width: min(820px, 76vw); }
  .prototype-mark span:last-child { display: none; }
}

@media (max-width: 820px) {
  .experience { height: var(--app-height, 100dvh); overflow: hidden; padding: 16px; }
  .scene { object-position: 30% center; opacity: 0.42; }
  .scene-wash { background: linear-gradient(0deg, rgba(2, 6, 6, 0.98) 0%, rgba(2, 6, 6, 0.78) 72%, rgba(2, 6, 6, 0.38)); }
  .masthead { align-items: center; }
  .visiting-mark { width: min(54vw, 300px); }
  .terminal,
  .site-footer { width: 100%; }
  .terminal { margin-top: 10px; min-height: 0; }
  .terminal-header { grid-template-columns: 1fr; gap: 14px; }
  .connection-grid { grid-template-columns: repeat(3, 1fr); }
  .prototype-mark { font-size: 0.62rem; }
}

@media (max-width: 560px) {
  .experience { padding: 10px; }
  .masthead { gap: 12px; }
  .visiting-mark { width: 56vw; }
  .prototype-mark { max-width: 110px; text-align: right; line-height: 1.45; }
  .terminal { grid-template-rows: auto minmax(0, 1fr) auto auto auto; }
  .terminal-header { padding: 14px; }
  .terminal h1 { font-size: 0.94rem; }
  .connection-grid { gap: 8px; }
  .connection-grid dt { font-size: 0.55rem; letter-spacing: 0.08em; }
  .connection-grid dd { font-size: 0.7rem; }
  .transcript { padding: 8px 14px 10px; }
  .entry { grid-template-columns: 67px minmax(0, 1fr) 28px; gap: 9px; }
  .entry-time { display: none; }
  .flag-state { display: none; }
  .entry p,
  .entry.entity p { font-size: 0.98rem; }
  .composer-block { padding: 12px 14px 14px; }
  .composer { grid-template-columns: 1fr; }
  button { min-height: 46px; }
  .signals { grid-template-columns: 1fr 1fr; }
  .signal-window { height: 42px; }
  .site-footer { align-items: center; margin-top: 8px; }
  .site-footer img { width: 98px; }
}

.keyboard-open .masthead,
.keyboard-open .site-footer,
.keyboard-open .signals { display: none; }
.keyboard-open .experience { grid-template-rows: minmax(0, 1fr); padding: 6px; }
.keyboard-open .terminal { margin-top: 0; }
.keyboard-open .terminal-header { padding-block: 8px; }
.keyboard-open .terminal-note { display: none; }
.keyboard-open .composer-block { padding-block: 8px; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
  .signal-base { opacity: .78; }
  .signal-overlay { display: none; }
  .typing-dots i { opacity: .65; transform: none; }
}

.qa-controls { display:flex; flex-wrap:wrap; align-items:center; gap:8px; padding:8px 16px; border-bottom:1px solid #294438; font-size:11px; }
.qa-controls[hidden] { display:none; }
.terminal:has(.qa-controls:not([hidden])) { grid-template-rows:auto auto minmax(0,1fr) auto auto auto; }
.qa-controls select,.qa-controls button { background:#091410; color:#b9dcc5; border:1px solid #45604e; padding:7px; font:inherit; max-width:100%; }
.qa-controls span { color:#86ab93; }
@media(max-width:600px) { .qa-controls { padding:6px 10px; gap:6px; } .qa-controls span { flex-basis:100%; } }
.keyboard-open .qa-controls { padding:4px 8px; gap:4px; }
.keyboard-open .qa-controls label { display:none; }
.keyboard-open .qa-controls select { max-width:46%; padding:5px; }
.keyboard-open .qa-controls button { flex:1; padding:5px; font-size:10px; }
.keyboard-open .qa-controls span { font-size:10px; }

/* Public beta disclosure stays outside the fixed terminal frame. */
.site-footer { display:grid; grid-template-columns:minmax(0,1fr) auto; align-items:center; gap:6px 18px; }
.beta-disclosure { min-width:0; }
.beta-disclosure p { margin:0 0 4px; color:#a4afa9; font-size:12px; line-height:1.4; }
.beta-disclosure a { display:inline-block; padding:4px 0; color:#a4c4bb; font-size:11px; letter-spacing:.09em; text-decoration:underline; text-underline-offset:3px; }
.site-footer > #development-review-link { grid-column:1/-1; justify-self:end; }
.visually-hidden { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip-path:inset(50%); white-space:nowrap; border:0; }
.keyboard-open .site-footer { display:grid; margin-top:6px; }
.keyboard-open .site-footer > img,.keyboard-open .site-footer > #development-review-link { display:none; }
.keyboard-open .experience { grid-template-rows:minmax(0,1fr) auto; }
@media(max-width:560px) { .site-footer { grid-template-columns:1fr; gap:2px; } .site-footer > img { display:none; } .site-footer > #development-review-link { font-size:9px; } }
@media(max-height:740px) { .visiting-mark { width:150px; } .terminal-header { padding-block:10px; gap:8px; } .signal-window { height:28px; } }

/* Connection/session control remains in fixed header chrome. */
.terminal-header {grid-template-columns:minmax(230px,1fr) minmax(270px,1fr) auto;gap:16px;align-items:center;}
.terminal-exit {display:flex;justify-content:flex-end;align-self:center;}
#terminate-button {min-height:30px;padding:7px 9px;font-size:9px;letter-spacing:.08em;white-space:nowrap;color:#91a39a;border:1px solid #3f5950;background:rgba(17,34,28,.3);}
#terminate-button:hover,#terminate-button:focus-visible {color:#c9dfd5;border-color:var(--cyan);background:rgba(71,119,114,.25);}
@media(max-width:1250px){.terminal-header{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px 16px;}.terminal-exit{grid-column:1/-1;}}
@media(max-width:820px){.terminal-header{grid-template-columns:1fr;gap:10px;}.terminal-exit{grid-column:1;}.connection-grid{grid-template-columns:repeat(3,minmax(0,1fr));}#terminate-button{min-height:32px;font-size:10px;}}
.keyboard-open .terminal-header{gap:6px;}.keyboard-open #terminate-button{min-height:28px;padding-block:5px;}

/* Live traces retain the approved fixed signal windows and faded ends. */
.signal-window canvas { display:block; width:100%; height:100%; mask-image:linear-gradient(to right,transparent,#000 12%,#000 88%,transparent); }

/* Align signal windows despite a two-line mobile caption. */
.signals > .signal-card { display:flex; flex-direction:column; }
.signals > .signal-card > .signal-window { flex-shrink:0; margin-top:auto; }