:root {
  color-scheme: light;
  --bg: #f4efe4;
  --panel: #fffaf2;
  --ink: #23170c;
  --muted: #746453;
  --line: #dcc7ab;
  --accent: #b65a2a;
  --accent-strong: #8d3e18;
  --user: #efe2cb;
  --bot: #fff;
  --shadow: 0 20px 50px rgba(82, 45, 15, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 224, 185, 0.9), transparent 30%),
    linear-gradient(180deg, #f7f2e8 0%, #ead9bd 100%);
}

.shell {
  display: grid;
  grid-template-columns: 340px 1fr;
  min-height: 100vh;
}

.sidebar,
.content {
  padding: 24px;
}

.sidebar {
  border-right: 1px solid rgba(117, 77, 40, 0.15);
}

.brand,
.panel,
.topbar,
.meta,
.messages,
.composer {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.brand,
.panel,
.topbar,
.meta,
.composer {
  padding: 18px;
}

.panel {
  margin-top: 20px;
}

.panel-head,
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.eyebrow {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

h1,
h2,
.strong {
  margin: 0;
}

.subtle,
.line,
time {
  color: var(--muted);
}

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

input,
textarea,
select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fffdf9;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 10px 16px;
  color: #fff7f0;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  max-height: calc(100vh - 270px);
  overflow: auto;
}

.instance-card {
  display: grid;
  gap: 12px;
}

.settings-form {
  display: grid;
  gap: 12px;
}

.session-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  font-size: 13px;
  color: var(--muted);
}

.ghost {
  background: #f2e7d3;
  color: var(--ink);
}

.qr-image {
  width: 100%;
  max-width: 220px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 10px;
}

.code-block {
  margin: 0;
  padding: 10px 12px;
  border-radius: 14px;
  background: #f2e7d3;
  overflow-wrap: anywhere;
}

.contact-card {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.contact-card.active {
  outline: 3px solid rgba(182, 90, 42, 0.22);
}

.chips {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.chips span,
.meta span {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: #f2e7d3;
  color: var(--ink);
  font-size: 13px;
}

.content {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 18px;
  min-width: 0;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.meta.empty {
  color: var(--muted);
}

.messages {
  padding: 18px;
  overflow: auto;
  min-height: 300px;
  min-width: 0;
}

.message {
  display: flex;
  flex-direction: column;
  margin-bottom: 14px;
}

.message.user {
  align-items: flex-end;
}

.bubble {
  max-width: min(680px, 88%);
  white-space: pre-wrap;
  padding: 12px 14px;
  border-radius: 18px;
  line-height: 1.45;
  border: 1px solid var(--line);
}

.message.user .bubble {
  background: var(--user);
}

.message.bot .bubble {
  background: var(--bot);
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

@media (max-width: 960px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid rgba(117, 77, 40, 0.15);
  }

  .sidebar,
  .content {
    padding: 18px;
  }

  .contact-list {
    max-height: 280px;
  }

  .composer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .sidebar,
  .content {
    padding: 14px;
  }

  .brand,
  .panel,
  .topbar,
  .meta,
  .composer {
    padding: 14px;
    border-radius: 18px;
  }

  .panel {
    margin-top: 14px;
  }

  .panel-head,
  .topbar {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .session-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .session-actions button,
  #refreshBtn,
  #resetBtn,
  #sendBtn,
  #saveSettingsBtn {
    width: 100%;
  }

  .contact-list {
    max-height: 220px;
  }

  .contact-card {
    padding: 12px;
  }

  .meta {
    gap: 8px;
  }

  .messages {
    min-height: 240px;
    max-height: 52vh;
    padding: 14px;
    border-radius: 18px;
  }

  .bubble {
    max-width: 94%;
    font-size: 15px;
  }

  .composer {
    position: sticky;
    bottom: 10px;
    z-index: 5;
  }

  .composer textarea {
    min-height: 96px;
  }

  .qr-image {
    max-width: min(100%, 260px);
    margin-inline: auto;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .eyebrow {
    font-size: 11px;
    letter-spacing: 0.12em;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.1rem;
  }

  input,
  textarea,
  button,
  select {
    font-size: 16px;
  }

  .chips {
    gap: 6px;
  }

  .chips span,
  .meta span {
    font-size: 12px;
    padding: 5px 9px;
  }

  .code-block {
    font-size: 13px;
  }

  .messages {
    max-height: 48vh;
  }
}