:root {
  color-scheme: light;
  --ink: #19222b;
  --muted: #66737f;
  --line: #d8e1e8;
  --panel: #ffffff;
  --panel-soft: #f7fafc;
  --page: #eef3f7;
  --primary: #136f63;
  --primary-strong: #0c564c;
  --accent: #b73e3e;
  --amber: #9a6700;
  --blue: #2663a4;
  --ok-bg: #e4f5ed;
  --ok: #17613d;
  --warn-bg: #fff3cf;
  --warn: #74520a;
  --bad-bg: #ffe7e3;
  --bad: #92352a;
  --neutral-bg: #edf2f6;
  --shadow: 0 18px 50px rgba(25, 34, 43, 0.12);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow: hidden;
  color: var(--ink);
  background:
    linear-gradient(180deg, #f8fbfd 0%, var(--page) 44%, #e8eef2 100%);
}

button,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
  border-radius: 8px;
  min-height: 42px;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 700;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.primary {
  color: white;
  background: var(--primary);
}

.primary:hover:not(:disabled) {
  background: var(--primary-strong);
}

.secondary {
  color: var(--ink);
  background: #e5edf2;
}

.secondary:hover:not(:disabled) {
  background: #d8e4eb;
}

.full-width {
  width: 100%;
}

.app-shell {
  width: min(1440px, 100%);
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  margin: 0 auto;
  padding: 24px 24px 72px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 18px;
}

.site-credit {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  justify-content: center;
  gap: 4px;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  color: var(--muted);
  background: rgba(248, 251, 253, 0.9);
  border-top: 1px solid rgba(216, 225, 232, 0.92);
  font-size: 0.84rem;
  font-weight: 800;
  backdrop-filter: blur(14px);
}

.site-credit a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  text-decoration-color: rgba(19, 111, 99, 0.42);
  text-underline-offset: 3px;
}

.site-credit a:hover {
  color: var(--primary-strong);
}

.github-logo {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  fill: currentColor;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(216, 225, 232, 0.9);
  border-radius: 8px;
  box-shadow: 0 8px 34px rgba(25, 34, 43, 0.08);
  backdrop-filter: blur(16px);
}

.brand {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 13px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: white;
  background: linear-gradient(135deg, var(--primary), var(--blue));
  border-radius: 8px;
  font-weight: 900;
}

.brand h1 {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.brand p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 800;
  white-space: nowrap;
}

.status-chip.neutral {
  color: #44515d;
  background: var(--neutral-bg);
}

.status-chip.ok {
  color: var(--ok);
  background: var(--ok-bg);
}

.status-chip.warn {
  color: var(--warn);
  background: var(--warn-bg);
}

.status-chip.bad {
  color: var(--bad);
  background: var(--bad-bg);
}

.workspace {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 390px);
  gap: 18px;
}

.chat-panel,
.side-panel {
  min-height: 0;
}

.chat-panel {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.messages {
  min-height: 0;
  overflow: auto;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.empty-state {
  min-height: 100%;
  display: grid;
  place-content: center;
  gap: 6px;
  text-align: center;
  color: var(--muted);
}

.empty-state strong {
  color: var(--ink);
  font-size: 1.1rem;
}

.message {
  width: min(760px, 100%);
  padding: 14px 16px;
  border-radius: 8px;
  line-height: 1.48;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.message .role {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.message.user {
  align-self: flex-end;
  color: white;
  background: var(--primary);
}

.message.user .role {
  color: rgba(255, 255, 255, 0.76);
}

.message.assistant {
  align-self: flex-start;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.message.system {
  align-self: center;
  color: var(--warn);
  background: var(--warn-bg);
}

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  padding: 14px;
  border-top: 1px solid var(--line);
  background: #fbfdfe;
}

.composer textarea,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: white;
}

.composer textarea,
.field textarea {
  resize: vertical;
  min-height: 86px;
  max-height: 260px;
  padding: 12px 13px;
  line-height: 1.45;
}

.composer textarea:focus,
.field textarea:focus,
.field select:focus {
  outline: 3px solid rgba(19, 111, 99, 0.16);
  border-color: var(--primary);
}

.composer-actions {
  display: flex;
  align-items: end;
  gap: 8px;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow: auto;
}

.control-section {
  padding: 16px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 28px rgba(25, 34, 43, 0.08);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.section-header span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.control-section h2 {
  margin: 0 0 12px;
  font-size: 0.9rem;
  letter-spacing: 0;
}

.meter {
  height: 10px;
  overflow: hidden;
  background: #e6edf2;
  border-radius: 999px;
}

.meter-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--blue));
  transition: width 160ms ease;
}

.diagnostic {
  min-height: 46px;
  margin: 12px 0;
  color: var(--muted);
  line-height: 1.42;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 13px;
}

.field span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.field select {
  height: 42px;
  padding: 0 10px;
}

.setup-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.45;
}

.setup-list li + li {
  margin-top: 8px;
}

code {
  color: #21303c;
  background: #edf2f6;
  border: 1px solid #dce5ec;
  border-radius: 6px;
  padding: 1px 5px;
  overflow-wrap: anywhere;
}

.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;
}

@media (max-width: 920px) {
  body {
    overflow: auto;
  }

  .app-shell {
    height: auto;
    min-height: 100vh;
    padding: 14px 14px 72px;
  }

  .topbar,
  .workspace {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .status-row {
    justify-content: flex-start;
  }

  .workspace {
    display: flex;
    flex-direction: column;
  }

  .chat-panel {
    min-height: 62vh;
  }

  .side-panel {
    min-height: auto;
  }
}

@media (max-width: 560px) {
  .app-shell {
    padding: 10px 10px 68px;
    gap: 10px;
  }

  .topbar,
  .control-section {
    padding: 12px;
  }

  .messages {
    min-height: 320px;
    padding: 14px;
  }

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

  .composer-actions {
    justify-content: stretch;
  }

  .composer-actions button {
    flex: 1;
  }
}