:root {
  color-scheme: dark;
  --bg: #070707;
  --bg-soft: #0a0a0a;
  --panel: rgba(17, 17, 17, 0.94);
  --panel-strong: rgba(17, 17, 17, 0.98);
  --text: #d7e6d7;
  --muted: #91a691;
  --line: #294029;
  --cyan: #aaffaa;
  --cyan-soft: #ccffcc;
  --pink: #ff4444;
  --pink-soft: #ffaaaa;
  --green: #aaffaa;
  --orange: #dec36f;
  --red: #ff4444;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  background: var(--bg);
}

body {
  height: 100dvh;
  min-height: 0;
  color: var(--text);
  font-family: Consolas, "SFMono-Regular", "Courier New", monospace;
  background:
    radial-gradient(ellipse at 14% 4%, rgba(170, 255, 170, 0.08), transparent 38%),
    radial-gradient(circle at 88% 78%, rgba(255, 68, 68, 0.08), transparent 34%),
    linear-gradient(180deg, #070707 0%, #0a0a0a 54%, #050505 100%);
  text-shadow: 0 0 6px rgba(170, 255, 170, 0.12);
  overflow: hidden;
}

button,
input,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.signal-noise {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.25;
  background:
    repeating-linear-gradient(180deg, transparent 0 3px, rgba(170, 255, 170, 0.035) 4px),
    repeating-radial-gradient(circle at 18% 24%, rgba(255, 255, 255, 0.07) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(94deg, transparent 0 27px, rgba(255, 68, 68, 0.025) 28px);
}

.app-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: min(100%, 760px);
  height: 100dvh;
  min-height: 0;
  margin: 0 auto;
  padding: calc(9px + var(--safe-top)) 12px calc(8px + var(--safe-bottom));
}

.topbar {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  border-bottom: 1px solid rgba(170, 255, 170, 0.24);
}

.topbar:has(#back-button.hidden) {
  grid-template-columns: minmax(0, 1fr) auto;
}

.brand-block {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  overflow: hidden;
  margin-bottom: 0;
  color: var(--cyan-soft);
  font-size: clamp(17px, 5vw, 24px);
  font-weight: 600;
  line-height: 1.05;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
  text-shadow: 2px 0 0 rgba(255, 68, 68, 0.28), -1px 0 0 rgba(170, 255, 170, 0.3), 0 0 14px rgba(170, 255, 170, 0.25);
}

h2 {
  margin-bottom: 8px;
  color: var(--cyan-soft);
  font-size: clamp(23px, 7vw, 34px);
  font-weight: 500;
}

.muted {
  color: var(--muted);
  line-height: 1.55;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.icon-button,
.quiet-action,
.primary-action,
.send-button {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 3px 1px 4px 2px;
  background: rgba(17, 17, 17, 0.94);
  color: var(--cyan);
}

.icon-button {
  width: 48px;
  padding: 0;
  font-size: 38px;
}

.connection-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  max-width: 178px;
  min-height: 34px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.15;
}

.status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 12px currentColor;
}

.connection-pill.is-online {
  border-color: rgba(170, 255, 170, 0.46);
  color: var(--green);
}

.connection-pill.is-online .status-dot {
  background: var(--green);
}

.connection-pill.is-offline,
.connection-pill.is-error {
  border-color: rgba(255, 68, 68, 0.54);
  color: var(--red);
}

.connection-pill.is-offline .status-dot,
.connection-pill.is-error .status-dot {
  background: var(--red);
}

.auth-view,
.chat-list-view {
  overflow: auto;
  overscroll-behavior: contain;
  padding: 16px 2px;
}

.auth-view {
  display: grid;
  place-items: center;
}

.sketch-card {
  position: relative;
  border: 1px solid rgba(170, 255, 170, 0.36);
  border-radius: 2px;
  background: linear-gradient(145deg, rgba(17, 17, 17, 0.98), rgba(10, 10, 10, 0.96));
  box-shadow: 4px 5px 0 rgba(0, 0, 0, 0.48), 0 0 18px rgba(170, 255, 170, 0.06);
}

.sketch-card::after,
.chat-card::after {
  content: "";
  position: absolute;
  inset: 3px -3px -3px 3px;
  z-index: -1;
  border: 1px solid rgba(255, 68, 68, 0.24);
  border-radius: inherit;
  transform: rotate(-0.25deg);
}

.auth-card {
  width: min(100%, 470px);
  padding: 30px 24px 26px;
}

.sigil {
  display: grid;
  place-items: center;
  width: 70px;
  height: 70px;
  margin-bottom: 26px;
  border: 1px dashed var(--pink);
  border-radius: 50% 46% 52% 48%;
  color: var(--cyan-soft);
  font-size: 25px;
  transform: rotate(-2deg);
  box-shadow: inset 0 0 24px rgba(255, 111, 183, 0.13), 0 0 20px rgba(101, 228, 255, 0.1);
}

.stack {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

label {
  color: var(--muted);
  font-size: 12px;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 2px 5px 2px 4px;
  outline: none;
  background: rgba(7, 7, 7, 0.94);
  color: var(--text);
}

input {
  min-height: 52px;
  padding: 0 14px;
}

input:focus,
textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(170, 255, 170, 0.12);
}

.primary-action {
  width: 100%;
  padding: 0 18px;
  border-color: var(--cyan);
  background: #0b1a1a;
  color: var(--cyan-soft);
  font-weight: 700;
  text-transform: uppercase;
}

.error-text {
  min-height: 20px;
  margin: 16px 0 0;
  color: var(--red);
  line-height: 1.4;
}

.list-intro {
  width: min(100%, 620px);
  margin: 4vh auto 18px;
  text-align: center;
}

.chat-list {
  display: grid;
  gap: 8px;
  width: min(100%, 620px);
  margin: 0 auto;
  padding: 2px 2px 18px;
}

.chat-card {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 64px;
  padding: 11px 12px 10px 15px;
  border: 1px solid rgba(170, 255, 170, 0.48);
  border-radius: 1px 3px 1px 2px;
  background: linear-gradient(105deg, rgba(11, 26, 26, 0.98), rgba(17, 17, 17, 0.98));
  color: var(--text);
  text-align: left;
  box-shadow: 4px 5px 0 rgba(0, 0, 0, 0.42), inset 3px 0 0 rgba(170, 255, 170, 0.42);
  transform: rotate(var(--tilt, 0deg));
}

.chat-card:nth-child(even) {
  --tilt: 0.15deg;
  border-color: rgba(255, 68, 68, 0.44);
  box-shadow: 4px 5px 0 rgba(0, 0, 0, 0.42), inset 3px 0 0 rgba(255, 68, 68, 0.42);
}

.chat-card[data-metro-color="rose"] { --metro-rgb: 249, 178, 196; }
.chat-card[data-metro-color="peach"] { --metro-rgb: 250, 197, 155; }
.chat-card[data-metro-color="butter"] { --metro-rgb: 244, 224, 139; }
.chat-card[data-metro-color="mint"] { --metro-rgb: 158, 229, 194; }
.chat-card[data-metro-color="sky"] { --metro-rgb: 151, 211, 246; }
.chat-card[data-metro-color="lilac"] { --metro-rgb: 203, 181, 244; }
.chat-card[data-metro-color="acid"] { --metro-rgb: 207, 255, 54; }
.chat-card[data-metro-color="toxic"] { --metro-rgb: 70, 255, 138; }
.chat-card[data-metro-color="plasma"] { --metro-rgb: 255, 83, 204; }
.chat-card[data-metro-color="volt"] { --metro-rgb: 67, 245, 232; }

.chat-card[data-metro-color] {
  border-color: rgba(var(--metro-rgb), 0.78);
  background: linear-gradient(105deg, rgba(var(--metro-rgb), 0.27), rgba(17, 17, 17, 0.98) 68%);
  box-shadow: 4px 5px 0 rgba(0, 0, 0, 0.42), inset 3px 0 0 rgba(var(--metro-rgb), 0.92);
}

.chat-card[data-metro-color] .chat-card-name {
  color: rgb(var(--metro-rgb));
}

.chat-card:active {
  transform: translate(2px, 2px) rotate(var(--tilt, 0deg));
  box-shadow: 2px 3px 0 rgba(0, 0, 0, 0.28);
}

.chat-card-name {
  overflow: hidden;
  color: var(--cyan-soft);
  font-size: clamp(15px, 4.7vw, 20px);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-card-meta {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.unread-mark {
  display: grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  margin-left: 8px;
  border: 1px solid var(--pink);
  border-radius: 50%;
  color: var(--pink-soft);
  font-size: 15px;
  box-shadow: 0 0 14px rgba(255, 68, 68, 0.3);
}

.empty-state {
  display: grid;
  gap: 10px;
  width: min(100%, 500px);
  margin: 9vh auto 0;
  padding: 28px;
  color: var(--muted);
  text-align: center;
  line-height: 1.5;
}

.empty-mark {
  color: var(--pink);
  font-size: 38px;
}

.chat-view {
  display: grid;
  min-height: 0;
  grid-template-rows: minmax(0, 1fr) auto;
}

.message-list {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 12px 2px 14px;
}

.message {
  width: fit-content;
  max-width: 92%;
  margin: 0 0 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 1px 4px 2px 5px;
  background: rgba(17, 17, 17, 0.92);
  font-size: 12px;
  line-height: 1.36;
  overflow-wrap: anywhere;
}

.message.user {
  margin-left: auto;
  border-color: rgba(255, 68, 68, 0.5);
  background: rgba(51, 0, 0, 0.72);
}

.message.assistant {
  margin-right: auto;
  border-color: rgba(170, 255, 170, 0.42);
}

.message-meta {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.message-body {
  white-space: pre-wrap;
}

.message-body a {
  color: var(--cyan);
}

.message-body code {
  padding: 1px 4px;
  border: 1px solid rgba(101, 228, 255, 0.18);
  background: rgba(1, 5, 13, 0.72);
  color: var(--green);
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 12px 0 4px;
  border-top: 1px solid rgba(170, 255, 170, 0.2);
  background: linear-gradient(180deg, rgba(7, 7, 7, 0.4), rgba(7, 7, 7, 0.98) 34%);
}

.composer textarea {
  min-height: 48px;
  max-height: 160px;
  padding: 11px;
  resize: none;
  line-height: 1.4;
}

.send-button {
  min-width: 72px;
  min-height: 48px;
  padding: 0 14px;
  border-color: var(--red);
  background: #111111;
  color: var(--cyan-soft);
  font-weight: 700;
}

.send-button:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

.footer-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding-top: 10px;
}

.quiet-action {
  min-height: 44px;
  padding: 0 14px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

@media (max-width: 520px) {
  .app-shell {
    padding-inline: 9px;
  }

  .topbar {
    grid-template-columns: 44px minmax(0, 1fr) auto;
  }

  .connection-pill {
    max-width: 116px;
    padding-inline: 8px;
  }

  .chat-card {
    min-height: 62px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}