:root {
  --bg: #f4efe5;
  --bg-accent: #ebe3d4;
  --card: rgba(255, 250, 243, 0.92);
  --border: rgba(40, 52, 73, 0.15);
  --text: #142033;
  --muted: #5e6a7d;
  --primary: #1147b7;
  --primary-strong: #0d3392;
  --danger: #b22f2f;
  --success: #0d6b4f;
  --shadow: 0 28px 80px rgba(20, 32, 51, 0.14);
  --radius: 22px;
  --radius-sm: 14px;
  --font-sans: "IBM Plex Sans", "Avenir Next", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at top left, rgba(17, 71, 183, 0.14), transparent 32%),
    radial-gradient(circle at top right, rgba(239, 118, 51, 0.18), transparent 30%),
    linear-gradient(180deg, #f8f4ec 0%, #f2ebdf 48%, #ece3d4 100%);
  min-height: 100vh;
}

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

.page-shell {
  max-width: 1680px;
  margin: 0 auto;
  padding: 28px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 30px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(245, 240, 231, 0.85)),
    linear-gradient(120deg, rgba(17, 71, 183, 0.08), rgba(239, 118, 51, 0.1));
  box-shadow: var(--shadow);
}

.eyebrow,
.panel-kicker {
  margin: 0 0 8px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary);
}

.hero h1,
.panel-header h2 {
  margin: 0;
  font-size: clamp(1.65rem, 2.4vw, 2.8rem);
  line-height: 1.05;
}

.hero-copy {
  max-width: 58rem;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.hero-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(160px, 1fr));
  gap: 14px;
  min-width: 320px;
}

.badge,
.metric-card,
.history-item,
.result-card,
.model-meta,
.file-list {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
}

.badge {
  padding: 16px 18px;
}

.badge span,
.metric-card span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.badge strong,
.metric-card strong {
  font-size: 1rem;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(360px, 1.15fr) minmax(420px, 1.25fr) minmax(320px, 0.85fr);
  gap: 20px;
  margin-top: 22px;
  align-items: start;
}

.panel {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 26px;
  background: rgba(255, 251, 245, 0.9);
  box-shadow: var(--shadow);
  min-height: 100%;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.panel-header h2 {
  font-size: 1.35rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field span {
  font-weight: 700;
  font-size: 0.92rem;
}

.field small {
  color: var(--muted);
  line-height: 1.4;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid rgba(20, 32, 51, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.86);
  padding: 12px 14px;
  color: var(--text);
}

.field textarea {
  min-height: 180px;
  resize: vertical;
}

.model-meta,
.file-list {
  padding: 14px 16px;
  color: var(--muted);
  line-height: 1.5;
}

.model-meta strong,
.file-pill strong {
  color: var(--text);
}

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

.file-pill {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(17, 71, 183, 0.08);
  border: 1px solid rgba(17, 71, 183, 0.12);
  font-size: 0.88rem;
}

.action-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 700;
  cursor: pointer;
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: white;
  min-width: 120px;
}

.button-muted {
  background: rgba(17, 71, 183, 0.08);
  color: var(--primary-strong);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.status-text {
  margin: 0;
  color: var(--muted);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.metric-card {
  padding: 16px 18px;
}

.metric-card strong {
  display: block;
  font-size: 1.24rem;
}

.result-card {
  padding: 20px;
  min-height: 480px;
  overflow: hidden;
}

.result-card.empty-state {
  display: grid;
  place-items: center;
  color: var(--muted);
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.meta-pill {
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 0.86rem;
  background: rgba(20, 32, 51, 0.06);
}

.result-block + .result-block {
  margin-top: 18px;
}

.result-block h3 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.result-pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  font-size: 0.96rem;
}

.result-output {
  padding: 14px;
  border-radius: 18px;
  background: rgba(20, 32, 51, 0.04);
}

.result-error {
  color: var(--danger);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 980px;
  overflow: auto;
  padding-right: 4px;
}

.history-item {
  padding: 16px;
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.history-item:hover {
  transform: translateY(-1px);
  border-color: rgba(17, 71, 183, 0.28);
}

.history-item.is-active {
  border-color: rgba(17, 71, 183, 0.5);
  background: rgba(17, 71, 183, 0.08);
}

.history-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.history-title {
  font-weight: 700;
}

.history-time {
  color: var(--muted);
  font-size: 0.86rem;
  white-space: nowrap;
}

.history-preview,
.history-metrics {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.history-metrics {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

details {
  border-top: 1px solid rgba(20, 32, 51, 0.08);
  padding-top: 12px;
}

details summary {
  cursor: pointer;
  font-weight: 700;
}

code,
pre {
  font-family: var(--font-mono);
}

@media (max-width: 1280px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 840px) {
  .page-shell {
    padding: 18px;
  }

  .hero {
    flex-direction: column;
  }

  .hero-badges,
  .control-grid,
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}