:root {
  color-scheme: light dark;
  --page-bg: #f5efe5;
  --page-ink: #1d2430;
  --page-muted: #5d6777;
  --surface: rgba(255, 251, 246, 0.92);
  --surface-strong: #fffaf2;
  --surface-border: rgba(45, 59, 82, 0.12);
  --surface-shadow: 0 16px 40px rgba(28, 35, 51, 0.08);
  --accent: #126e63;
  --accent-strong: #0a4d47;
  --accent-soft: rgba(18, 110, 99, 0.12);
  --warm: #bc6a2f;
  --warm-soft: rgba(188, 106, 47, 0.12);
  --cool: #285f90;
  --cool-soft: rgba(40, 95, 144, 0.12);
  --sage: #51724d;
  --sage-soft: rgba(81, 114, 77, 0.12);
  --neutral-soft: rgba(61, 74, 96, 0.1);
  --focus: #0d7f74;
  --heading-font: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --body-font: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  --mono-font: "SF Mono", "Menlo", "Consolas", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page-bg: #131720;
    --page-ink: #eff3f8;
    --page-muted: #b5bfd0;
    --surface: rgba(19, 25, 37, 0.92);
    --surface-strong: #192131;
    --surface-border: rgba(201, 214, 235, 0.12);
    --surface-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
    --accent: #6cd0c0;
    --accent-strong: #8fe6d6;
    --accent-soft: rgba(108, 208, 192, 0.14);
    --warm: #f0ad72;
    --warm-soft: rgba(240, 173, 114, 0.16);
    --cool: #8abcf2;
    --cool-soft: rgba(138, 188, 242, 0.16);
    --sage: #b1dd8a;
    --sage-soft: rgba(177, 221, 138, 0.14);
    --neutral-soft: rgba(201, 214, 235, 0.12);
    --focus: #7ce6d6;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--body-font);
  color: var(--page-ink);
  background:
    radial-gradient(circle at top left, rgba(18, 110, 99, 0.18), transparent 34%),
    radial-gradient(circle at top right, rgba(188, 106, 47, 0.14), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 25%),
    var(--page-bg);
  line-height: 1.5;
}

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

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

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

button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--accent);
  color: white;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

button:hover,
button:focus-visible,
.button-link:hover,
.button-link:focus-visible {
  background: var(--accent-strong);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--accent);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  z-index: 1000;
}

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

.app-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.25rem;
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.masthead__identity,
.masthead__summary,
.service-rail,
.content-surface,
.rail-card,
.section-block,
.detail-card,
.metric-card,
.empty-state,
.flash {
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--surface-border);
  box-shadow: var(--surface-shadow);
  min-width: 0;
}

.masthead__identity,
.content-surface,
.service-rail {
  border-radius: 1.5rem;
}

.masthead__identity {
  padding: 1.6rem;
}

.masthead__identity h1 {
  margin: 0.15rem 0 0.5rem;
  font-family: var(--heading-font);
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.02;
}

.lede,
.section-block__description,
.metric-card__detail,
.rail-card__hint,
.hint {
  color: var(--page-muted);
  overflow-wrap: anywhere;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.masthead__summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  padding: 1rem;
  border-radius: 1.5rem;
}

.metric-card {
  border-radius: 1.15rem;
  padding: 1rem;
  background: var(--surface-strong);
}

.metric-card__label,
.metric-card__detail,
.metric-card__value {
  margin: 0;
}

.metric-card__label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--page-muted);
}

.metric-card__value {
  margin-top: 0.45rem;
  font-size: 1.25rem;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(250px, 320px) minmax(0, 1fr);
  gap: 1rem;
}

.service-rail {
  padding: 1rem;
  display: grid;
  gap: 1rem;
  align-content: start;
}

.rail-card {
  border-radius: 1.15rem;
  padding: 1rem;
  background: var(--surface-strong);
}

.rail-card h2,
.section-block h2,
.detail-card h3,
.empty-state h2 {
  margin: 0 0 0.55rem;
  font-family: var(--heading-font);
}

.plain-list {
  margin: 0;
  padding-left: 1.1rem;
}

.plain-list li + li {
  margin-top: 0.35rem;
}

.stack-form,
.editor-form {
  display: grid;
  gap: 0.75rem;
}

.stack-form label,
.editor-form label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  min-width: 0;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.field-grid > * {
  min-width: 0;
}

input,
select,
textarea {
  width: 100%;
  max-width: 100%;
  min-height: 2.7rem;
  padding: 0.7rem 0.8rem;
  border-radius: 0.9rem;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.72);
  color: inherit;
}

@media (prefers-color-scheme: dark) {
  input,
  select,
  textarea {
    background: rgba(255, 255, 255, 0.04);
  }
}

.content-surface {
  padding: 1rem;
}

.service-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.service-nav__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 0.9rem;
  border-radius: 999px;
  text-decoration: none;
  background: var(--neutral-soft);
  color: var(--page-ink);
  font-weight: 700;
}

.service-nav__link--current {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.flash {
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  margin-bottom: 1rem;
}

.flash--success {
  border-left: 0.35rem solid var(--accent);
}

.section-block {
  border-radius: 1.35rem;
  padding: 1.1rem;
  margin-bottom: 1rem;
}

.section-block__header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem 1rem;
  margin-bottom: 1rem;
}

.section-block__header h2 {
  margin-bottom: 0.2rem;
}

.section-block__body {
  display: grid;
  gap: 1rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
}

.card-grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card-grid--single {
  grid-template-columns: 1fr;
}

.detail-card {
  border-radius: 1.15rem;
  padding: 1rem;
  background: var(--surface-strong);
}

.detail-card--warm {
  background: linear-gradient(180deg, var(--warm-soft), transparent 45%), var(--surface-strong);
}

.detail-card--cool {
  background: linear-gradient(180deg, var(--cool-soft), transparent 45%), var(--surface-strong);
}

.detail-card--sage {
  background: linear-gradient(180deg, var(--sage-soft), transparent 45%), var(--surface-strong);
}

.detail-card__header p,
.detail-card__body p,
.detail-card__body ul,
.detail-card__body dl {
  margin-top: 0;
}

.detail-card__header p {
  color: var(--page-muted);
}

.badge-row,
.route-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--neutral-soft);
}

.status-badge--warm {
  background: var(--warm-soft);
  color: var(--warm);
}

.status-badge--cool {
  background: var(--cool-soft);
  color: var(--cool);
}

.status-badge--sage {
  background: var(--sage-soft);
  color: var(--sage);
}

.status-badge--neutral {
  background: var(--neutral-soft);
  color: var(--page-ink);
}

.definition-table {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem 1rem;
  margin-bottom: 0.9rem;
}

.definition-table div {
  padding: 0.7rem 0.8rem;
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.42);
}

@media (prefers-color-scheme: dark) {
  .definition-table div {
    background: rgba(255, 255, 255, 0.03);
  }
}

.definition-table dt {
  font-weight: 700;
  color: var(--page-muted);
}

.definition-table dd {
  margin: 0.25rem 0 0;
  overflow-wrap: anywhere;
}

.route-chip {
  min-width: 13rem;
  flex: 1 1 14rem;
  border-radius: 1rem;
  padding: 0.75rem 0.9rem;
  background: var(--neutral-soft);
}

.route-chip strong,
.route-chip span {
  display: block;
  overflow-wrap: anywhere;
}

.stack-group {
  display: grid;
  gap: 0.8rem;
}

.usage-list h4 {
  margin-bottom: 0.45rem;
}

.usage-list ul {
  margin: 0;
  padding-left: 1rem;
}

.usage-list li + li {
  margin-top: 0.35rem;
}

.usage-scope {
  display: inline-block;
  min-width: 3.8rem;
  margin-right: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--page-muted);
}

.schedule-window {
  padding: 0.55rem 0.75rem;
  border-radius: 0.8rem;
  background: var(--neutral-soft);
}

.empty-state {
  border-radius: 1.2rem;
  padding: 1.5rem;
  text-align: left;
}

@media (max-width: 1080px) {
  .masthead,
  .service-layout,
  .card-grid--three,
  .card-grid--two,
  .field-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  .app-shell {
    padding: 0.8rem;
  }

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

  .definition-table {
    grid-template-columns: 1fr;
  }

  .service-nav {
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }
}