:root {
  --jasmine-white: #ffffff;
  --paper: #ffffff;
  --green: #31475e;
  --green-dark: #243548;
  --orange: #b7663b;
  --red: #cf2f2f;
  --red-dark: #a92121;
  --charcoal: #2d2926;
  --muted: #746b61;
  --line: #e4e4e4;
  --line-dark: #b8b8b8;
  --tint: #f5f5f5;
  --container: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--jasmine-white);
  color: var(--charcoal);
  font-family: "Source Sans 3", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.5;
}

body.nav-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.container {
  width: min(100% - 28px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--green-dark);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand::after {
  content: "";
  display: block;
  width: 38px;
  height: 3px;
  margin-top: 2px;
  background: var(--red);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-menu a,
.nav-toggle {
  padding: 8px 12px;
  border: 1px solid transparent;
  color: #3f3a35;
  background: transparent;
  font-weight: 600;
}

.nav-menu a:hover,
.nav-menu a:focus-visible,
.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--red);
  outline: none;
}

.nav-toggle {
  display: none;
  cursor: pointer;
}

.intro {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.intro-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 440px);
  gap: 36px;
  align-items: center;
  padding: 24px 0;
}

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

h1 {
  margin-bottom: 12px;
  color: var(--green);
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

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

h2 {
  margin-bottom: 4px;
  color: var(--green-dark);
  font-size: clamp(1.65rem, 3vw, 2.3rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

h3 {
  margin-bottom: 6px;
  font-size: 1.22rem;
}

.intro-copy p {
  max-width: 620px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.18rem;
}

.search-panel {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--jasmine-white);
}

.search-panel label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.92rem;
  font-weight: 700;
}

.search-row {
  display: flex;
  gap: 8px;
}

.search-row input {
  width: 100%;
  min-width: 0;
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line-dark);
  border-radius: 0;
  background: #fff;
  color: var(--charcoal);
}

.search-row input:focus {
  border-color: var(--red);
  outline: 2px solid rgba(207, 47, 47, 0.16);
  outline-offset: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--red-dark);
  background: var(--red);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}

.btn:hover,
.btn:focus-visible {
  background: var(--red-dark);
  outline: none;
}

.btn-secondary {
  border-color: var(--line-dark);
  background: transparent;
  color: var(--charcoal);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--tint);
}

.catalogues-section {
  padding: 28px 0 36px;
}

.section-title {
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--red);
}

.catalogue-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: var(--paper);
}

.catalogue-card {
  min-height: 252px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.catalogue-content {
  display: flex;
  flex-direction: column;
  padding: 16px;
}

.catalogue-content p {
  margin-bottom: 14px;
  color: var(--muted);
}

.pdf-preview {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 74px;
  margin: 0 0 14px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, transparent 0 78%, #f0f0f0 78%),
    #fafafa;
}

.pdf-page {
  position: absolute;
  width: 46px;
  height: 58px;
  border: 2px solid var(--red);
  background: #fff;
}

.pdf-page::after {
  content: "";
  position: absolute;
  right: -2px;
  top: -2px;
  width: 14px;
  height: 14px;
  border-left: 2px solid var(--red);
  border-bottom: 2px solid var(--red);
  background: #f7dede;
}

.pdf-label {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  padding: 2px 8px;
  background: var(--red);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.catalogue-actions {
  display: grid;
  gap: 8px;
  margin-top: auto;
}

.empty-state {
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--paper);
  text-align: center;
}

.about-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--tint);
}

.about-inner {
  display: grid;
  grid-template-columns: 220px minmax(0, 680px);
  gap: 34px;
  padding: 28px 0;
}

.about-inner p {
  margin-bottom: 0;
  color: var(--muted);
}

.site-footer {
  background: var(--paper);
}

.footer-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-inner p {
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  color: var(--charcoal);
  font-weight: 600;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--red);
  outline: none;
}

.hidden {
  display: none;
}

@media (max-width: 860px) {
  .intro-inner,
  .about-inner {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .intro-inner {
    padding: 24px 0;
  }

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

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .container {
    width: min(100% - 24px, var(--container));
  }

  .brand {
    font-size: 1.3rem;
  }

  .nav-toggle {
    display: inline-block;
    min-height: 42px;
  }

  .nav-menu {
    position: fixed;
    top: 60px;
    left: 12px;
    right: 12px;
    display: grid;
    gap: 0;
    border: 1px solid var(--line);
    background: var(--paper);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu a {
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
  }

  .intro-inner {
    padding: 20px 0;
  }

  h1 {
    font-size: clamp(2.45rem, 14vw, 3.4rem);
  }

  .intro-copy p {
    font-size: 1.05rem;
  }

  .search-panel {
    padding: 14px;
  }

  .search-row {
    display: grid;
  }

  .search-row input,
  .btn {
    min-height: 48px;
  }

  .catalogues-section {
    padding: 24px 0 30px;
  }

  .catalogue-card {
    min-height: auto;
  }

  .catalogue-content {
    padding: 18px;
  }

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

  .catalogue-content {
    padding: 14px;
  }

  .catalogue-content h3 {
    font-size: 1.05rem;
  }

  .catalogue-content p {
    font-size: 0.9rem;
  }

  .catalogue-actions {
    grid-template-columns: 1fr;
  }

  .catalogue-actions .btn {
    padding: 0 10px;
    font-size: 0.92rem;
  }

  .section-title,
  .footer-inner {
    align-items: start;
    flex-direction: column;
  }
}