:root {
  color-scheme: light;
  --bg: #f1eee5;
  --panel: #f6f3ea;
  --panel-strong: #fbf8f0;
  --panel-border: #b8ab89;
  --text: #231f16;
  --muted: #6c6558;
  --accent: #8e6b17;
  --accent-soft: rgba(142, 107, 23, 0.14);
  --success: #406b39;
  --shadow: none;
  --radius: 0px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #080507;
  --panel: #0f0a0e;
  --panel-strong: #120d0f;
  --panel-border: #44213e;
  --text: #ffe0f9;
  --muted: #c98890;
  --accent: #F5AFAF;
  --accent-soft: #f4a5ae81;
  --success: #F5AFAF;
  --shadow: none;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Consolas, "SFMono-Regular", "Liberation Mono", Menlo, monospace;
  color: var(--text);
  background: var(--bg);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.02),
      rgba(255, 255, 255, 0.02) 1px,
      transparent 1px,
      transparent 4px
    );
  opacity: 0.28;
}

.shell {
  position: relative;
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
}

.hero {
  padding: 0.3rem 0 1.4rem;
  animation: fade-up 420ms ease;
}

.eyebrow,
.meta-label {
  margin: 0 0 0.45rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
}

.hero h1 {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(2.15rem, 5vw, 4.5rem);
  line-height: 0.94;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.lede {
  margin: 1rem 0 0;
  max-width: 42rem;
  color: var(--muted);
  line-height: 1.6;
}

.panel-grid {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 1.2rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.setup-card {
  padding: 1.2rem;
  animation: fade-up 650ms ease;
}

.setup-form {
  display: grid;
  gap: 0.9rem;
}

.setup-form label,
.composer,
.config-grid {
  display: grid;
  gap: 0.45rem;
}

.setup-form span,
.config-grid span {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

input,
textarea,
button,
select {
  font: inherit;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  background: var(--panel-strong);
  color: var(--text);
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  transform: translateY(-1px);
}

button {
  border: 1px solid color-mix(in srgb, var(--accent) 65%, transparent);
  border-radius: var(--radius);
  padding: 0.92rem 1.2rem;
  background: var(--panel-strong);
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

button:disabled {
  opacity: 0.46;
  cursor: not-allowed;
}

.meta,
.config-menu {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--panel-border);
}

.status {
  margin: 0.8rem 0 0;
  min-height: 1.4rem;
  color: var(--muted);
}

.status.connected {
  color: var(--success);
}

.config-menu summary {
  cursor: pointer;
  list-style: none;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.82rem;
  color: var(--accent);
}

.config-menu summary::-webkit-details-marker {
  display: none;
}

.config-menu summary::before {
  content: "> ";
}

.config-menu[open] summary::before {
  content: "v ";
}

.config-grid {
  margin-top: 0.85rem;
}

.toggle {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.toggle input {
  width: 1.1rem;
  height: 1.1rem;
  padding: 0;
  margin: 0;
  accent-color: var(--accent);
}

.config-hint {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.chat-card {
  padding: 1rem;
  min-height: 70vh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 1rem;
  animation: fade-up 820ms ease;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
}

.chat-header h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.9rem);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.disclaimer {
  margin: 0;
  max-width: 24rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.messages {
  min-height: 16rem;
  max-height: 58vh;
  overflow-y: auto;
  padding: 0.2rem 0.1rem 0.2rem 0;
  display: grid;
  gap: 0.8rem;
}

.messages.empty::before {
  content: "> no messages yet // start the session";
  display: block;
  padding: 1.15rem;
  border-radius: var(--radius);
  border: 1px dashed var(--panel-border);
  background: transparent;
  color: var(--muted);
}

.message {
  position: relative;
  padding: 0.95rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  background: transparent;
}

.message::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 1px;
  background: var(--accent);
}

.message header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
}

.author {
  font-size: 0.95rem;
  color: var(--accent);
  text-transform: uppercase;
}

.timestamp {
  color: var(--muted);
  font-size: 0.78rem;
}

.body {
  margin: 0.55rem 0 0;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.composer {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
}

.composer textarea {
  resize: vertical;
  min-height: 3.2rem;
  max-height: 12rem;
}

code {
  display: inline-block;
  margin-top: 0.2rem;
  word-break: break-all;
  color: var(--accent);
}

textarea::placeholder,
input::placeholder {
  color: var(--muted);
}

::selection {
  background: var(--accent-soft);
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .chat-card {
    min-height: auto;
  }

  .chat-header,
  .composer {
    display: grid;
    grid-template-columns: 1fr;
  }

  .messages {
    max-height: 50vh;
  }
}