:root {
  --pico-font-family: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --pico-border-radius: 0.25rem;
}

:root,
:root[data-theme="dark"] {
  --app-bg: #101815;
  --app-ink: #edf3ef;
  --app-muted: #9aa8a2;
  --app-line: #31433c;
  --app-accent: #18251f;
  --app-warm: #e36e4d;
  --app-panel: #17211d;
  --app-item: #1d2a24;
  --app-link: #71c7aa;
  --app-refused-bg: #2a1f1d;
  --app-refused-line: #a85e4f;
  --app-maintenance-bg: #1f2630;
  --app-maintenance-line: #5f7894;
  --app-glow: rgba(113, 199, 170, 0.28);
}

:root[data-theme="light"] {
  --app-bg: #f6f7f8;
  --app-ink: #17211d;
  --app-muted: #60706a;
  --app-line: #d9dfdc;
  --app-accent: #20312b;
  --app-warm: #d35f3f;
  --app-panel: #ffffff;
  --app-item: #fbfcfc;
  --app-link: #2f705f;
  --app-refused-bg: #fff8f6;
  --app-refused-line: #e0a49a;
  --app-maintenance-bg: #f3f8fc;
  --app-maintenance-line: #97b4cf;
  --app-glow: rgba(47, 112, 95, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(113, 199, 170, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(113, 199, 170, 0.028) 1px, transparent 1px),
    var(--app-bg);
  background-size: 1.25rem 1.25rem;
  color: var(--app-ink);
  font-variant-ligatures: none;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 1.35rem;
  font-weight: 750;
  letter-spacing: 0;
}

h1::before {
  content: "$ ";
  color: var(--app-warm);
}

h2 {
  font-size: 1rem;
  font-weight: 720;
}

.panel-head h2::before {
  content: ">";
  margin-right: 0.45rem;
  color: var(--app-warm);
}

button {
  white-space: nowrap;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 2.5rem);
  background:
    repeating-linear-gradient(90deg, rgba(247, 241, 223, 0.03) 0 1px, transparent 1px 0.75rem),
    var(--app-accent);
  color: #f7f1df;
  border-bottom: 4px solid var(--app-warm);
  box-shadow: inset 0 -1px 0 rgba(247, 241, 223, 0.12);
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.pixel-mascot {
  width: 2.75rem;
  height: 2.75rem;
  image-rendering: pixelated;
  background:
    linear-gradient(#f7f1df 0 0) 0.55rem 0.35rem / 1.65rem 0.3rem,
    linear-gradient(var(--app-warm) 0 0) 2.2rem 0 / 0.35rem 0.8rem,
    linear-gradient(#f7f1df 0 0) 0.25rem 0.85rem / 2.25rem 1.6rem,
    linear-gradient(#101815 0 0) 0.65rem 1.15rem / 0.35rem 0.35rem,
    linear-gradient(#101815 0 0) 1.75rem 1.15rem / 0.35rem 0.35rem,
    linear-gradient(#71c7aa 0 0) 1.05rem 1.7rem / 0.7rem 0.35rem,
    linear-gradient(var(--app-warm) 0 0) 0 1.15rem / 0.35rem 0.8rem,
    linear-gradient(var(--app-warm) 0 0) 2.4rem 1.15rem / 0.35rem 0.8rem,
    linear-gradient(#71c7aa 0 0) 0.65rem 2.15rem / 1.45rem 0.35rem;
  background-repeat: no-repeat;
  flex: 0 0 auto;
  animation: mascot-bob 1.8s steps(2, end) infinite;
}

.pixel-mascot.thinking {
  animation: mascot-think 0.7s steps(2, end) infinite;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-switch {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  color: rgba(247, 241, 223, 0.9);
  font-size: 0.9rem;
  font-weight: 650;
}

.theme-switch input {
  margin: 0;
}

.status {
  margin-top: 0.25rem;
  color: rgba(247, 241, 223, 0.78);
  font-size: 0.9rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(22rem, 32rem) minmax(0, 1fr);
  gap: 1.25rem;
  width: min(92rem, calc(100% - 2rem));
  margin: 1.375rem auto;
}

.query-panel,
.answer-panel {
  padding: 1.125rem;
  background: var(--app-panel);
  border: 1px solid var(--app-line);
  border-radius: var(--pico-border-radius);
  box-shadow: 0.25rem 0.25rem 0 var(--app-glow);
  position: relative;
  overflow: hidden;
}

.query-panel::before,
.answer-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, transparent 0 0.45rem, rgba(247, 241, 223, 0.018) 0.45rem 0.5rem);
}

.answer-panel {
  min-height: 70vh;
}

.panel-head,
.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.ask-form {
  display: grid;
  gap: 0.625rem;
  margin-top: 1rem;
}

.ask-form label {
  margin-bottom: -0.25rem;
  color: var(--app-muted);
  font-size: 0.88rem;
  font-weight: 650;
}

.ask-form select,
.ask-form textarea {
  margin-bottom: 0;
}

.ask-form textarea {
  min-height: 8.125rem;
  resize: vertical;
}

.compact-button {
  width: auto;
  padding: 0.45rem 0.7rem;
  margin: 0;
}

.icon-button {
  display: inline-grid;
  width: 2.625rem;
  height: 2.625rem;
  min-width: 2.625rem;
  place-items: center;
  padding: 0;
  margin: 0;
  font-size: 1.1rem;
}

.form-actions button[type="submit"] {
  flex: 1;
  margin: 0;
}

.history-block,
.stats-block,
.sources-block {
  margin-top: 1.375rem;
}

.history-list,
.sources-list {
  display: grid;
  gap: 0.625rem;
  margin-top: 0.625rem;
}

.history-item,
.source-item,
.answer-box {
  width: 100%;
  border: 1px solid var(--app-line);
  border-radius: var(--pico-border-radius);
  background: var(--app-item);
  color: var(--app-ink);
  box-shadow: inset 0 0 0 1px rgba(247, 241, 223, 0.025);
}

.history-item {
  padding: 0.625rem;
  margin: 0;
  text-align: left;
}

.history-item:hover,
.source-item:hover {
  border-color: var(--app-link);
}

.history-item strong,
.source-item strong {
  display: block;
  font-size: 0.94rem;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-item span,
.source-item span,
.result-meta,
.status-line {
  color: var(--app-muted);
  font-size: 0.84rem;
}

.answer-box {
  min-height: 13.75rem;
  margin-top: 1rem;
  padding: 1rem;
  line-height: 1.55;
  position: relative;
}

.answer-box p {
  margin: 0 0 0.85rem;
}

.answer-box p:last-child {
  margin-bottom: 0;
}

.answer-box strong {
  color: var(--app-link);
  font-weight: 800;
}

.answer-box.empty::after {
  content: "█";
  margin-left: 0.25rem;
  color: var(--app-link);
  animation: cursor-blink 1s steps(2, end) infinite;
}

.answer-box.empty {
  color: var(--app-muted);
}

.answer-box.refused {
  border-color: var(--app-refused-line);
  background: var(--app-refused-bg);
}

.answer-box.maintenance {
  border-color: var(--app-maintenance-line);
  background: var(--app-maintenance-bg);
  color: var(--app-ink);
}

.source-item {
  padding: 0.75rem;
  border-left: 0.25rem solid var(--app-warm);
}

.source-item a {
  display: block;
  margin-top: 0.375rem;
  color: var(--app-link);
  overflow-wrap: anywhere;
  text-decoration: none;
}

.source-item a:hover {
  text-decoration: underline;
}

.citation-button {
  display: inline-flex;
  width: auto;
  min-height: 1.45rem;
  align-items: center;
  padding: 0 0.35rem;
  margin: 0 0.1rem;
  border: 1px solid var(--app-link);
  background: rgba(113, 199, 170, 0.1);
  color: var(--app-link);
  font-size: 0.85em;
  line-height: 1;
  vertical-align: baseline;
}

.score {
  color: var(--app-warm);
  font-weight: 750;
}

.stats-box {
  display: grid;
  gap: 0.25rem;
  margin-top: 0.625rem;
  padding: 0.75rem;
  border: 1px solid var(--app-line);
  border-radius: var(--pico-border-radius);
  background: var(--app-item);
}

.source-dialog {
  width: min(68rem, calc(100vw - 2rem));
}

.source-dialog article {
  width: 100%;
  max-width: none;
  margin: 0;
  background: var(--app-panel);
  border: 1px solid var(--app-line);
  box-shadow: 0.25rem 0.25rem 0 var(--app-glow);
}

.source-dialog header p {
  padding-right: 2rem;
  overflow: hidden;
  color: var(--app-ink);
  font-weight: 750;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-dialog footer {
  margin-top: 0.75rem;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  background: rgba(16, 24, 21, 0.62);
  backdrop-filter: blur(2px);
}

.loading-overlay[hidden] {
  display: none;
}

.loading-panel {
  display: grid;
  justify-items: center;
  gap: 0.85rem;
  min-width: min(22rem, calc(100vw - 2rem));
  padding: 1.25rem;
  border: 1px solid var(--app-line);
  border-radius: var(--pico-border-radius);
  background: var(--app-panel);
  box-shadow: 0.25rem 0.25rem 0 var(--app-glow);
}

.loading-panel .pixel-mascot {
  transform: scale(1.45);
}

.loading-panel .pixel-mascot.thinking {
  animation: mascot-think-large 0.7s steps(2, end) infinite;
}

.loading-panel p {
  color: var(--app-ink);
  font-weight: 750;
}

.source-excerpts {
  display: grid;
  gap: 0.75rem;
  max-height: min(72vh, 46rem);
  overflow: auto;
}

.source-excerpt {
  padding: 0.85rem;
  border: 1px solid var(--app-line);
  border-left: 0.25rem solid var(--app-warm);
  border-radius: var(--pico-border-radius);
  background: var(--app-item);
}

.source-excerpt-meta {
  margin-bottom: 0.5rem;
  color: var(--app-muted);
  font-size: 0.82rem;
}

.source-excerpt p {
  margin: 0;
  color: var(--app-ink);
  line-height: 1.55;
}

button,
select,
textarea {
  letter-spacing: 0;
}

button {
  box-shadow: 0.125rem 0.125rem 0 var(--app-glow);
}

button:active {
  transform: translate(0.0625rem, 0.0625rem);
  box-shadow: 0.0625rem 0.0625rem 0 var(--app-glow);
}

@keyframes cursor-blink {
  50% {
    opacity: 0;
  }
}

@keyframes mascot-bob {
  50% {
    transform: translateY(-0.125rem);
  }
}

@keyframes mascot-think {
  50% {
    filter: drop-shadow(0 0 0.45rem var(--app-link));
    transform: translateY(-0.18rem) rotate(-2deg);
  }
}

@keyframes mascot-think-large {
  50% {
    filter: drop-shadow(0 0 0.45rem var(--app-link));
    transform: scale(1.45) translateY(-0.18rem) rotate(-2deg);
  }
}

@media (max-width: 820px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .answer-panel {
    min-height: 50vh;
  }
}

@media (max-width: 520px) {
  .topbar {
    align-items: flex-start;
  }

  .topbar-actions {
    flex-direction: column-reverse;
    align-items: flex-end;
    gap: 0.5rem;
  }
}