:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --panel: #ffffff;
  --panel-soft: #f0f0f0;
  --line: #e2e2e5;
  --text: #202123;
  --muted: #6e6e80;
  --accent: #111827;
  --accent-dark: #000000;
  --danger: #b42318;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
  --content-width: 820px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

.login-body {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(420px, 100%);
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.login-panel h1 {
  margin: 0 0 20px;
  font-size: 24px;
  font-weight: 700;
}

.login-panel label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
}

.login-panel input {
  width: 100%;
  height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
}

.login-panel button,
.composer button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

.login-panel button {
  width: 100%;
  margin-top: 16px;
  padding: 0 16px;
}

.login-panel button:hover,
.composer button:hover {
  background: var(--accent-dark);
}

.login-error {
  margin: 12px 0 0;
  color: var(--danger);
}

.chat-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--bg);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.topbar-inner {
  width: min(var(--content-width), calc(100% - 32px));
  margin: 0 auto;
  padding: 14px 0 10px;
}

.title-block {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.title-block h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.2;
}

.title-block p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.status-line {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.status-line span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-line span:not(:last-child)::after {
  content: "/";
  margin-left: 10px;
  color: color-mix(in srgb, var(--muted) 55%, transparent);
}

#memoryStatus.available {
  color: #167647;
}

#memoryStatus.unavailable {
  color: var(--danger);
}

.messages {
  width: min(var(--content-width), calc(100% - 32px));
  margin: 0 auto;
  overflow-y: auto;
  padding: 28px 0 120px;
}

.message {
  max-width: 78%;
  margin-bottom: 18px;
  padding: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.55;
  font-size: 16px;
}

.message.user {
  margin-left: auto;
  padding: 12px 16px;
  background: var(--panel-soft);
  border-radius: 18px;
}

.message.lila {
  margin-right: auto;
  color: var(--text);
}

.message.error {
  padding: 12px 16px;
  border: 1px solid color-mix(in srgb, var(--danger) 35%, var(--line));
  border-radius: 12px;
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, var(--panel));
}

.composer-wrap {
  position: sticky;
  bottom: 0;
  z-index: 2;
  padding: 16px;
  background: linear-gradient(to top, var(--bg) 76%, color-mix(in srgb, var(--bg) 0%, transparent));
}

.composer {
  width: min(var(--content-width), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.composer textarea {
  width: 100%;
  min-height: 44px;
  max-height: 220px;
  resize: none;
  padding: 11px 8px;
  border: 0;
  outline: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  line-height: 1.4;
}

.composer button {
  align-self: end;
  min-width: 104px;
  padding: 0 16px;
}

.composer button:disabled {
  opacity: 0.6;
  cursor: wait;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #212121;
    --panel: #2f2f2f;
    --panel-soft: #303030;
    --line: #3f3f46;
    --text: #ececec;
    --muted: #b4b4b4;
    --accent: #ececec;
    --accent-dark: #d5d5d5;
    --danger: #ffb4a8;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
  }

  .composer button,
  .login-panel button {
    color: #111111;
  }

  #memoryStatus.available {
    color: #7ee2a8;
  }
}

@media (max-width: 720px) {
  .topbar-inner,
  .messages {
    width: calc(100% - 24px);
  }

  .title-block {
    display: block;
  }

  .title-block p {
    margin-top: 3px;
  }

  .status-line {
    display: block;
    white-space: normal;
    line-height: 1.45;
  }

  .status-line span {
    display: inline;
  }

  .message {
    max-width: 92%;
    font-size: 15px;
  }

  .composer-wrap {
    padding: 10px;
  }

  .composer {
    grid-template-columns: 1fr auto;
    border-radius: 14px;
  }

  .composer button {
    min-width: 88px;
    padding: 0 12px;
  }
}