:root {
  color-scheme: light;
  --color-bg: #f4f5f1;
  --color-surface: #ffffff;
  --color-surface-raised: #f9faf7;
  --color-text: #18201c;
  --color-muted: #5e6963;
  --color-border: #d7ddd8;
  --color-accent: #176b4d;
  --color-accent-strong: #0c5139;
  --color-accent-soft: #dceee6;
  --color-warning: #885b00;
  --color-warning-soft: #fff0c7;
  --color-danger: #9c2626;
  --focus: #0a72cc;
  --shadow: 0 18px 50px rgb(32 53 43 / 10%);
  --radius-small: 0.55rem;
  --radius-medium: 1rem;
  --radius-large: 1.5rem;
  --space-1: 0.35rem;
  --space-2: 0.6rem;
  --space-3: 0.9rem;
  --space-4: 1.25rem;
  --space-5: 1.75rem;
  --space-6: 2.5rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --color-bg: #101612;
    --color-surface: #18211c;
    --color-surface-raised: #1d2822;
    --color-text: #edf5f0;
    --color-muted: #adbbb2;
    --color-border: #35423a;
    --color-accent: #6bd3a9;
    --color-accent-strong: #98e4c5;
    --color-accent-soft: #173c2e;
    --color-warning: #ffd36f;
    --color-warning-soft: #4a370d;
    --color-danger: #ff9b96;
    --focus: #72baf5;
    --shadow: 0 18px 50px rgb(0 0 0 / 28%);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #101612;
  --color-surface: #18211c;
  --color-surface-raised: #1d2822;
  --color-text: #edf5f0;
  --color-muted: #adbbb2;
  --color-border: #35423a;
  --color-accent: #6bd3a9;
  --color-accent-strong: #98e4c5;
  --color-accent-soft: #173c2e;
  --color-warning: #ffd36f;
  --color-warning-soft: #4a370d;
  --color-danger: #ff9b96;
  --focus: #72baf5;
  --shadow: 0 18px 50px rgb(0 0 0 / 28%);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-width: 20rem;
  background: var(--color-bg);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 90% 0%, var(--color-accent-soft), transparent 26rem),
    var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

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

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

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

select,
input,
textarea {
  min-height: 2.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-surface);
  color: var(--color-text);
}

select {
  padding: 0 var(--space-3);
}

input,
textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-muted);
  opacity: 1;
}

input[type="checkbox"],
input[type="radio"] {
  width: 2.75rem;
  padding: 0;
  accent-color: var(--color-accent);
}

textarea {
  resize: vertical;
}

.page-shell {
  width: min(100% - 2rem, 74rem);
  margin-inline: auto;
  padding-block: clamp(2rem, 7vw, 5rem);
}

.hero {
  display: grid;
  gap: var(--space-4);
  align-items: end;
  margin-bottom: var(--space-6);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section-heading h1,
.item-detail-heading h1 {
  font-size: clamp(2.1rem, 7vw, 4.25rem);
}

.field select {
  width: 100%;
}

h1,
h2,
p {
  margin-top: 0;
}

h1,
h2 {
  text-wrap: balance;
}

h1 {
  max-width: 18ch;
  margin-bottom: var(--space-3);
  font-size: clamp(2.25rem, 8vw, 4.8rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h2 {
  margin-bottom: var(--space-2);
  font-size: 1.3rem;
}

.eyebrow {
  margin-bottom: var(--space-2);
  color: var(--color-accent-strong);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lede {
  max-width: 58ch;
  color: var(--color-muted);
  font-size: clamp(1rem, 3vw, 1.2rem);
}

.status-chip {
  width: fit-content;
  padding: var(--space-2) var(--space-3);
  border-radius: 999px;
  background: var(--color-warning-soft);
  color: var(--color-warning);
  font-size: 0.88rem;
  font-weight: 700;
}

.card-grid {
  display: grid;
  gap: var(--space-4);
}

.feature-card,
.auth-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-surface);
  box-shadow: var(--shadow);
}

.feature-card {
  min-height: 13rem;
  padding: var(--space-5);
}

.feature-card p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.card-action {
  display: inline-block;
  margin-top: var(--space-4);
  font-weight: 760;
}

.feature-number {
  display: block;
  margin-bottom: var(--space-6);
  color: var(--color-accent-strong);
  font-size: 0.8rem;
  font-weight: 800;
}

.auth-card {
  display: grid;
  max-width: 58rem;
  gap: var(--space-6);
  margin-inline: auto;
  padding: clamp(1.4rem, 6vw, 3.5rem);
}

.auth-card h1 {
  font-size: clamp(2.25rem, 7vw, 4rem);
}

.stack,
.field {
  display: grid;
  gap: var(--space-2);
}

.stack {
  align-content: start;
  gap: var(--space-4);
}

.field label {
  font-weight: 700;
}

.maintenance-override {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-warning);
  border-radius: var(--radius-small);
  background: var(--color-warning-soft);
}

.maintenance-override > summary {
  min-height: 2.75rem;
  align-content: center;
  font-weight: 760;
  cursor: pointer;
}

.maintenance-override > summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.maintenance-override > p {
  margin: 0;
}

.maintenance-override .checkbox-field {
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
}

.maintenance-override .checkbox-field .help-text,
.maintenance-override .checkbox-field .field-errors {
  grid-column: 1 / -1;
}

.help-text,
.field-errors,
.form-errors {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.field-errors,
.form-errors {
  color: var(--color-danger);
}

.field-errors ul,
.form-errors ul {
  margin: 0;
  padding-left: 1.2rem;
}

.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  font-weight: 760;
  cursor: pointer;
  text-decoration: none;
  touch-action: manipulation;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.button-primary {
  background: var(--color-accent);
  color: var(--color-bg);
}

.button-quiet {
  border-color: var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.button-primary:hover {
  background: var(--color-accent-strong);
}

.button-quiet:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.file-button:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.messages {
  width: min(100% - 2rem, 74rem);
  margin: var(--space-3) auto 0;
}

.message {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  overflow-wrap: anywhere;
}

.runtime-banner {
  display: flex;
  width: min(100% - 2rem, 74rem);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin: var(--space-3) auto 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-warning);
  border-radius: var(--radius-medium);
  background: var(--color-warning-soft);
  color: var(--color-text);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.runtime-banner[hidden] {
  display: none;
}

.runtime-banner[data-connection-state="online"],
.runtime-banner-update {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.system-overview {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-6);
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-surface);
  box-shadow: var(--shadow);
}

.app-version-data {
  display: grid;
  gap: var(--space-3);
  margin: 0;
}

.app-version-data div {
  display: grid;
  gap: var(--space-1);
}

.app-version-data dt {
  color: var(--color-muted);
  font-size: 0.84rem;
  font-weight: 750;
}

.app-version-data dd {
  margin: 0;
}

@media (min-width: 48rem) {
  .hero {
    grid-template-columns: 1fr auto;
  }

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

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

  .system-overview {
    grid-template-columns: minmax(0, 1.4fr) minmax(16rem, 0.6fr);
  }
}

@media (max-width: 34rem) {
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}