/* ===========================================================
   Apprencio — feuille de style commune
   Palette (issue du vrai logo) : blanc / bleu marine #0b3b54 / orange #f17320
   Note : les variables --color-blue et --color-yellow contiennent
   respectivement le bleu marine et l'orange de la marque.
   =========================================================== */

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f5f8fb;
  --color-text: #14232c;
  --color-text-soft: #4b5c66;
  --color-blue: #0b3b54;
  --color-blue-dark: #072835;
  --color-blue-soft: #e7edf0;
  --color-yellow: #f17320;
  --color-yellow-dark: #cc5c11;
  --color-border: #e2e8ec;

  --radius: 14px;
  --shadow: 0 4px 18px rgba(11, 59, 84, 0.1);
  --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

a { color: var(--color-blue); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header / navigation ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.4rem;
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  height: 36px;
  width: auto;
  flex-shrink: 0;
}

.logo span { color: var(--color-yellow); }

.footer-logo {
  height: 30px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--color-text-soft);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--color-blue-soft);
  color: var(--color-blue);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--color-blue);
}

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(180deg, var(--color-blue-soft) 0%, #ffffff 100%);
  padding: 72px 0 64px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  background: var(--color-yellow);
  color: #302200;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.15;
  margin: 0 0 18px;
}

.hero h1 .highlight { color: var(--color-blue); }

.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-text-soft);
  margin: 0 0 28px;
  max-width: 46ch;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.hero-card ul { margin: 0; padding-left: 1.1em; }
.hero-card li { margin-bottom: 10px; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  font-size: 0.98rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--color-blue);
  color: #fff;
  box-shadow: 0 6px 16px rgba(29, 78, 216, 0.28);
}
.btn-primary:hover { background: var(--color-blue-dark); }

.btn-secondary {
  background: #fff;
  color: var(--color-blue);
  border-color: var(--color-blue);
}
.btn-secondary:hover { background: var(--color-blue-soft); }

.btn-yellow {
  background: var(--color-yellow);
  color: #302200;
}
.btn-yellow:hover { background: var(--color-yellow-dark); }

/* ---------- Sections generic ---------- */

section { padding: 64px 0; }

.section-title {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}

.section-title h2 { font-size: 2rem; margin: 0 0 12px; }
.section-title p { color: var(--color-text-soft); margin: 0; }

.soft-bg { background: var(--color-bg-soft); }

/* ---------- Cards / grids ---------- */

.grid {
  display: grid;
  gap: 24px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}

.card h3 { margin: 4px 0 10px; }
.card p { color: var(--color-text-soft); margin: 0 0 14px; }

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-yellow);
  color: #302200;
  margin-bottom: 12px;
}

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

/* ---------- Cours page ---------- */

.matiere-block { margin-bottom: 52px; }
.matiere-block h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.6rem;
  border-bottom: 3px solid var(--color-yellow);
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.niveau-title {
  font-weight: 700;
  color: var(--color-blue);
  margin: 24px 0 12px;
  font-size: 1.05rem;
}

.file-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 12px 16px;
}

.file-item .file-name { font-weight: 600; }
.file-item .file-type {
  font-size: 0.75rem;
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.file-item a.download {
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
}

/* ---------- Videos page ---------- */

.video-card iframe,
.video-card .video-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: 10px 10px 0 0;
  display: block;
}

.video-placeholder {
  background: var(--color-blue-soft);
  color: var(--color-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  text-align: center;
  padding: 20px;
}

.video-card {
  padding: 0;
  overflow: hidden;
}

.video-card .video-body { padding: 18px 20px 22px; }

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

form.contact-form { display: grid; gap: 16px; }

.contact-form label {
  font-weight: 600;
  font-size: 0.9rem;
  display: block;
  margin-bottom: 6px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  font-family: inherit;
  font-size: 1rem;
}

.contact-form textarea { min-height: 140px; resize: vertical; }

.contact-info .card { margin-bottom: 20px; }

/* ---------- Footer ---------- */

footer.site-footer {
  background: var(--color-text);
  color: #cbd5e1;
  padding: 40px 0;
  margin-top: 40px;
}

footer.site-footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

footer.site-footer a { color: #fff; }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }

  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 12px 24px 20px;
    border-bottom: 1px solid var(--color-border);
    display: none;
  }

  .nav-links.open { display: flex; }

  .nav-toggle { display: block; }
}