:root {
  --blue: #1e5f8f;
  --blue-dark: #17476c;
  --blue-light: #e8f2fa;
  --green: #2f8b57;
  --green-dark: #236b42;
  --green-light: #e8f6ee;
  --text: #25313b;
  --muted: #667684;
  --border: #d8e3ea;
  --bg: #eef4f8;
  --white: #ffffff;
  --soft: #f8fbfd;
  --yellow-soft: #fff8df;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--green-dark);
  text-decoration: underline;
}

.site-wrapper {
  max-width: 1180px;
  margin: 0 auto;
  background: var(--white);
  box-shadow: 0 0 24px rgba(27, 61, 84, 0.12);
}

/* Header avec bannière */

.site-header {
  background: var(--white);
}

.site-top-banner {
  width: 100%;
  margin: 0;
  padding: 0;
  background: var(--white);
}

.top-banner-link {
  display: block;
  width: 100%;
  color: inherit;
  text-decoration: none;
}

.top-banner-link:hover,
.top-banner-link:focus {
  text-decoration: none;
}

.top-banner-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 1180px;
  margin: 0 auto;
}

/* Menu desktop + mobile */

.mobile-nav-bar {
  display: none;
  background: var(--blue);
  border-top: 1px solid var(--blue-dark);
  border-bottom: 3px solid var(--green);
  padding: 8px 12px;
  text-align: right;
}

.mobile-nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 38px;
  padding: 0;
  background: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 4px;
  cursor: pointer;
}

.mobile-nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background: var(--blue-dark);
  border-radius: 3px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-nav-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  background: var(--blue);
  border-top: 1px solid var(--blue-dark);
  border-bottom: 3px solid var(--green);
}

.main-nav a {
  padding: 13px 16px;
  color: var(--white);
  font-size: 0.95rem;
  font-weight: bold;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.main-nav a:first-child {
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

.main-nav a:hover,
.main-nav a:focus,
.main-nav a.active {
  background: var(--green);
  color: var(--white);
  text-decoration: none;
}

/* Layout */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  padding: 24px;
}

.main-content {
  min-width: 0;
}

.content-box,
.side-box {
  margin-bottom: 22px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.content-box {
  padding: 24px;
}

.intro-box {
  background:
    linear-gradient(90deg, rgba(232, 242, 250, 0.96), rgba(255, 255, 255, 0.96)),
    var(--white);
  border-top: 4px solid var(--green);
}

.breadcrumb {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.9rem;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.25;
}

h1 {
  margin-bottom: 16px;
  color: var(--blue-dark);
  font-size: 2.15rem;
}

h2 {
  margin-bottom: 16px;
  padding-bottom: 9px;
  color: var(--blue-dark);
  font-size: 1.55rem;
  border-bottom: 2px solid var(--blue-light);
}

h2::first-letter {
  color: var(--green);
}

h3 {
  margin-bottom: 8px;
  color: var(--green-dark);
  font-size: 1.18rem;
}

.lead {
  color: #33424e;
  font-size: 1.08rem;
}

.quick-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.btn-main,
.btn-secondary,
.side-button {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 3px;
  font-weight: bold;
  text-align: center;
}

.btn-main {
  background: var(--green);
  color: var(--white);
  border: 1px solid var(--green-dark);
}

.btn-main:hover,
.btn-main:focus {
  background: var(--green-dark);
  color: var(--white);
  text-decoration: none;
}

.btn-secondary {
  background: var(--blue);
  color: var(--white);
  border: 1px solid var(--blue-dark);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--blue-dark);
  color: var(--white);
  text-decoration: none;
}

/* Liste PDF - accueil uniquement */

.home-page .pdf-list {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.home-page .pdf-item {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 16px;
  background: var(--soft);
  border: 1px solid var(--border);
  border-left: 4px solid var(--green);
  border-radius: 4px;
}

.home-page .pdf-cover {
  width: 128px;
}

.home-page .pdf-cover img {
  display: block;
  width: 128px;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--blue-light);
  border: 1px solid var(--border);
}

.home-page .pdf-text {
  min-width: 0;
}

.home-page .pdf-text h3 {
  margin-top: 0;
}

.home-page .pdf-text p {
  margin-bottom: 10px;
}

.home-page .meta-line {
  color: var(--muted);
  font-size: 0.93rem;
}

/* Cartes thèmes */

.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.theme-card {
  display: block;
  padding: 15px 16px;
  background: var(--blue-light);
  border: 1px solid #c9dce9;
  border-radius: 4px;
}

.theme-card strong {
  display: block;
  margin-bottom: 4px;
  color: var(--blue-dark);
  font-size: 1.05rem;
}

.theme-card span {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
}

.theme-card:hover,
.theme-card:focus {
  background: var(--green-light);
  border-color: #b8dcc8;
  text-decoration: none;
}

/* Note */

.note-box {
  margin-top: 18px;
  padding: 16px 18px;
  background: var(--yellow-soft);
  border: 1px solid #eadc9d;
  border-left: 4px solid #d4a82c;
  border-radius: 4px;
}

/* Sidebar */

.sidebar {
  min-width: 0;
}

.side-box {
  padding: 18px;
  background: #fbfdff;
}

.side-box h2 {
  margin: -18px -18px 14px;
  padding: 11px 14px;
  background: var(--blue);
  color: var(--white);
  font-size: 1.05rem;
  border-bottom: 3px solid var(--green);
}

.side-box h2::first-letter {
  color: var(--white);
}

.side-box ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.side-box li {
  border-bottom: 1px solid var(--border);
}

.side-box li:last-child {
  border-bottom: 0;
}

.side-box li a {
  display: block;
  padding: 9px 0;
  font-weight: bold;
}

.side-highlight {
  background: var(--green-light);
  border-color: #b8dcc8;
}

.side-button {
  display: block;
  margin-top: 12px;
  background: var(--green);
  color: var(--white);
  border: 1px solid var(--green-dark);
}

.side-button:hover,
.side-button:focus {
  background: var(--green-dark);
  color: var(--white);
  text-decoration: none;
}

/* Bannière publicitaire sidebar */

.side-ad-box {
  margin-bottom: 22px;
  padding: 10px;
  background: #0d1216;
  border: 1px solid var(--border);
  border-radius: 4px;
  text-align: center;
}

.side-ad-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.side-ad-link:hover,
.side-ad-link:focus {
  text-decoration: none;
}

.side-ad-link img {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 0 auto;
  border-radius: 3px;
}

.side-ad-note {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.78rem;
  line-height: 1.3;
}

/* Footer */

.site-footer {
  background: var(--blue-dark);
  color: rgba(255, 255, 255, 0.88);
  border-top: 4px solid var(--green);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 24px;
}

.footer-inner p {
  margin: 6px 0 0;
}

.site-footer a {
  color: var(--white);
  font-weight: bold;
}

/* Responsive tablette */

@media (max-width: 900px) {
  .mobile-nav-bar {
    display: block;
  }

  .main-nav {
    display: none;
    background: var(--blue-dark);
    border-top: 0;
    border-bottom: 3px solid var(--green);
  }

  .main-nav.is-open {
    display: block;
  }

  .main-nav a {
    display: block;
    padding: 13px 18px;
    border-right: 0;
    border-left: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  }

  .main-nav a:first-child {
    border-left: 0;
  }

  .main-nav a:last-child {
    border-bottom: 0;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .side-box,
  .side-ad-box {
    margin-bottom: 0;
  }
}

/* Responsive mobile */

@media (max-width: 680px) {
  body {
    background: var(--white);
  }

  .site-wrapper {
    box-shadow: none;
  }

  .top-banner-img {
    width: 100%;
    height: auto;
  }

  .page-layout {
    padding: 14px;
  }

  .content-box {
    padding: 18px;
  }

  h1 {
    font-size: 1.78rem;
  }

  h2 {
    font-size: 1.35rem;
  }

  .home-page .pdf-item {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 16px;
  }

  .home-page .pdf-cover {
    width: 100%;
    max-width: 190px;
    margin: 0 auto;
  }

  .home-page .pdf-cover img {
    width: 100%;
    max-width: 190px;
    margin: 0 auto;
  }

  .home-page .pdf-text {
    width: 100%;
  }

  .home-page .pdf-text h3 {
    margin-top: 0;
  }

  .theme-grid,
  .sidebar {
    grid-template-columns: 1fr;
  }

  .quick-buttons {
    display: block;
  }

  .btn-main,
  .btn-secondary {
    display: block;
    margin-bottom: 10px;
  }

  .footer-inner {
    display: block;
    padding: 20px 14px;
  }

  .footer-inner div + div {
    margin-top: 14px;
  }
}