:root {
  color-scheme: light;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
  color: #1f2933;
  background: #f6f8fb;
  --ink: #1f2933;
  --muted: #52606d;
  --line: #cbd5e1;
  --panel: #ffffff;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --focus: #f59e0b;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

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

button,
a {
  cursor: pointer;
}

a {
  color: var(--accent-dark);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: white;
  padding: 0.75rem 1rem;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.site-title {
  margin: 0;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  font-weight: 700;
}

.eyebrow {
  margin: 0;
  color: var(--accent-dark);
  font-weight: 700;
  text-transform: uppercase;
}

nav,
.actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

button,
.nav-link {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  border-radius: 6px;
  padding: 0.65rem 0.85rem;
  text-decoration: none;
}

button:hover,
.nav-link:hover {
  border-color: var(--accent);
}

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

.primary:hover {
  background: var(--accent-dark);
}

main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0;
}

footer {
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
}

.page-intro,
.panel,
.workflow,
.notice,
.hint-box,
.card,
.metric {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.page-intro,
.panel,
.workflow {
  padding: clamp(1rem, 3vw, 2rem);
}

.notice,
.hint-box {
  padding: 1rem;
  margin: 1rem 0;
}

.notice {
  border-left: 5px solid var(--accent);
}

.hint-box summary {
  cursor: pointer;
  font-weight: 700;
}

.steps li {
  margin-bottom: 0.5rem;
}

form {
  display: grid;
  gap: 0.85rem;
}

label,
legend {
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem;
  background: #ffffff;
}

textarea {
  min-height: 8rem;
  resize: vertical;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}

.checkbox {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  font-weight: 400;
}

.checkbox input {
  width: auto;
  margin-top: 0.3rem;
}

.helper,
small,
.muted {
  color: var(--muted);
}

.error {
  color: var(--danger);
  font-weight: 700;
}

.metric-grid,
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}

.metric,
.card {
  padding: 1rem;
}

.metric strong {
  display: block;
  font-size: 1.5rem;
}

.card h3,
.card h4 {
  margin-top: 0;
}

.ticket-card dl,
.details {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.35rem 0.75rem;
}

dt {
  font-weight: 700;
}

dd {
  margin: 0;
}

.badge {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  background: #eef6f5;
}

.model-response {
  border-left: 5px solid var(--accent);
  padding-left: 1rem;
}

@media (max-width: 760px) {
  .site-header {
    grid-template-columns: 1fr;
  }

  .nav-link {
    flex: 1 1 145px;
  }

  .ticket-card dl,
  .details {
    grid-template-columns: 1fr;
  }
}