:root {
  color-scheme: light;
  --background: #f4f6f2;
  --surface: #ffffff;
  --ink: #1f2d2a;
  --muted: #68736f;
  --line: #d9dfdb;
  --accent: #2f6f5f;
  --accent-dark: #24584c;
  --available: #27765b;
  --unavailable: #a04437;
  --pending: #93651d;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: var(--sans);
}

a {
  color: inherit;
}

.site-header,
main,
footer {
  width: min(880px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 66px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand-mark {
  display: grid;
  gap: 2px;
  width: 23px;
  color: var(--accent);
  transform: rotate(-2deg);
}

.brand-mark i {
  display: block;
  height: 4px;
  border: 1.5px solid currentColor;
  border-radius: 1px;
}

.brand-mark i:nth-child(2) {
  width: 19px;
  margin-left: 3px;
}

.library-label,
.form-meta,
#checked-at {
  color: var(--muted);
  font-size: 0.76rem;
}

main {
  padding-bottom: 64px;
}

.hero {
  padding: 36px 0 20px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.intro {
  max-width: 620px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.5;
}

.checker {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 8px 26px rgb(36 55 49 / 6%);
}

.checker-heading,
.results-heading,
.result-title-row,
.form-meta,
.edition {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.checker-heading {
  margin-bottom: 12px;
}

h2 {
  margin-bottom: 0;
  font-size: 0.92rem;
  font-weight: 750;
}

.text-button {
  padding: 3px 0;
  background: none;
  border: 0;
  color: var(--accent);
  cursor: pointer;
  font: 700 0.78rem var(--sans);
}

.logout-button {
  padding: 4px 0;
  background: none;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  font: 700 0.76rem var(--sans);
}

.logout-button:hover {
  color: var(--ink);
}

.text-button:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

textarea {
  display: block;
  width: 100%;
  min-height: 154px;
  resize: vertical;
  padding: 14px 16px;
  background: #fbfcfa;
  border: 1px solid #cbd3ce;
  border-radius: 9px;
  color: var(--ink);
  font: 1rem/1.55 var(--sans);
}

textarea:focus {
  outline: 3px solid rgb(47 111 95 / 14%);
  border-color: var(--accent);
}

textarea::placeholder {
  color: #919a96;
}

.form-meta {
  padding: 9px 1px 14px;
}

.over-limit {
  color: var(--unavailable);
  font-weight: 700;
}

.submit-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 13px 18px;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: white;
  cursor: pointer;
  font: 750 0.88rem var(--sans);
  transition: background 140ms ease;
}

.submit-button:hover:not(:disabled) {
  background: var(--accent-dark);
}

.submit-button:focus-visible,
.text-button:focus-visible,
.logout-button:focus-visible,
.catalog-link:focus-visible {
  outline: 3px solid rgb(47 111 95 / 22%);
  outline-offset: 3px;
}

.submit-button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.results-section {
  padding-top: 52px;
  scroll-margin-top: 18px;
}

.results-heading {
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.results-heading h2 {
  font-family: var(--serif);
  font-size: 1.85rem;
  font-weight: 400;
  letter-spacing: -0.025em;
}

.summary {
  padding: 15px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.summary strong {
  color: var(--ink);
}

.results-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.result-card {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 14px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.result-number,
.result-query {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.result-number {
  padding-top: 4px;
}

.result-query {
  margin-bottom: 6px;
}

.result-title-row {
  align-items: flex-start;
}

.result-title {
  margin-bottom: 5px;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.author {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 0.84rem;
}

.status-badge,
.edition-status {
  flex: 0 0 auto;
  white-space: nowrap;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-available {
  color: var(--available);
}

.status-unavailable,
.status-not_found,
.status-error,
.status-unknown {
  color: var(--unavailable);
}

.status-on_order {
  color: var(--pending);
}

.editions {
  max-width: 720px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.edition {
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.78rem;
}

.edition-details {
  display: flex;
  gap: 12px;
}

.call-number {
  color: var(--muted);
}

.result-note {
  max-width: 620px;
  margin: 14px 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.catalog-link {
  display: inline-block;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 750;
  text-underline-offset: 3px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 22px 0 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.72rem;
}

footer p {
  margin: 0;
}

.login-main {
  display: grid;
  min-height: calc(100vh - 66px);
  place-items: start center;
  padding-top: clamp(64px, 12vh, 130px);
}

.login-card {
  width: min(440px, 100%);
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 8px 26px rgb(36 55 49 / 6%);
}

.login-eyebrow {
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.login-card h1 {
  font-size: clamp(2rem, 7vw, 2.7rem);
}

.login-card form {
  margin-top: 28px;
}

.login-card label {
  display: block;
  margin-bottom: 7px;
  font-size: 0.78rem;
  font-weight: 750;
}

.login-card input {
  display: block;
  width: 100%;
  padding: 13px 14px;
  background: #fbfcfa;
  border: 1px solid #cbd3ce;
  border-radius: 8px;
  color: var(--ink);
  font: 1rem var(--sans);
}

.login-card input:focus {
  outline: 3px solid rgb(47 111 95 / 14%);
  border-color: var(--accent);
}

.login-card .submit-button {
  margin-top: 16px;
}

.login-error {
  margin: 10px 0 -2px;
  color: var(--unavailable);
  font-size: 0.78rem;
  font-weight: 700;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 600px) {
  .site-header,
  main,
  footer {
    width: min(100% - 28px, 880px);
  }

  .library-label {
    display: none;
  }

  .login-main {
    padding-top: 42px;
  }

  .login-card {
    padding: 24px;
  }

  .hero {
    padding: 28px 0 16px;
  }

  h1 {
    font-size: 2.15rem;
  }

  .checker {
    padding: 18px;
    border-radius: 11px;
  }

  textarea {
    min-height: 170px;
  }

  .results-section {
    padding-top: 42px;
  }

  .result-card {
    grid-template-columns: 28px 1fr;
    gap: 8px;
  }

  .result-title-row,
  .edition {
    display: block;
  }

  .status-badge,
  .edition-status {
    display: block;
    margin-top: 7px;
  }

  footer {
    display: block;
  }

  footer p + p {
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}