/* ══════════════════════════════════════════════════════
   DR OCA VALENTIN — Design System Partagé
   Chirurgien orthopédiste · Roncq 59223
══════════════════════════════════════════════════════ */

:root {
  --navy:        #1B1B8F;
  --navy-dark:   #13136A;
  --navy-light:  #2929B8;
  --sky:         #7DC8E8;
  --sky-light:   #B8E4F5;
  --sky-pale:    #EBF7FD;
  --white:       #FFFFFF;
  --gray-50:     #F8FAFC;
  --gray-100:    #EEF2F7;
  --gray-200:    #DCE4EE;
  --gray-500:    #64748B;
  --text-dark:   #111827;
  --text-body:   #374151;
  --text-muted:  #6B7280;
  --success:     #059669;
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   22px;
  --radius-xl:   32px;
  --shadow-sm:   0 2px 8px rgba(27,27,143,0.08);
  --shadow-md:   0 8px 32px rgba(27,27,143,0.12);
  --shadow-lg:   0 20px 60px rgba(27,27,143,0.15);
  --transition:  all 0.25s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'Inter', sans-serif; color: var(--text-body); background: var(--white); line-height: 1.65; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4, h5 { font-family: 'Nunito', sans-serif; font-weight: 800; color: var(--navy); line-height: 1.2; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }
:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; border-radius: 4px; }

/* ── Layout ── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section--alt { background: var(--gray-50); }
.section--navy { background: var(--navy); }
.section--sky { background: var(--sky-pale); }

/* ── Breadcrumb ── */
.breadcrumb { padding: 14px 0; font-size: 13px; color: var(--text-muted); }
.breadcrumb a { color: var(--navy); font-weight: 600; }
.breadcrumb a:hover { color: var(--sky); }
.breadcrumb span { margin: 0 6px; }

/* ── Buttons ── */
.btn { display:inline-flex; align-items:center; gap:8px; padding:13px 26px; border-radius:100px; font-family:'Nunito',sans-serif; font-weight:700; font-size:15px; cursor:pointer; border:none; transition:var(--transition); white-space:nowrap; }
.btn-primary { background:var(--navy); color:var(--white); box-shadow:0 4px 20px rgba(27,27,143,0.3); }
.btn-primary:hover { background:var(--navy-dark); transform:translateY(-2px); box-shadow:0 8px 28px rgba(27,27,143,0.4); }
.btn-sky { background:var(--sky); color:var(--navy); box-shadow:0 4px 20px rgba(125,200,232,0.4); }
.btn-sky:hover { background:var(--sky-light); transform:translateY(-2px); }
.btn-outline { background:transparent; color:var(--navy); border:2px solid var(--navy); }
.btn-outline:hover { background:var(--navy); color:var(--white); }
.btn-outline-white { background:transparent; color:var(--white); border:2px solid rgba(255,255,255,0.5); }
.btn-outline-white:hover { background:rgba(255,255,255,0.1); border-color:white; }
.btn-lg { padding:17px 34px; font-size:17px; }

/* ── Section labels ── */
.section-label { display:inline-flex; align-items:center; gap:8px; font-family:'Nunito',sans-serif; font-size:12px; font-weight:700; letter-spacing:0.1em; text-transform:uppercase; color:var(--sky); background:rgba(125,200,232,0.12); border:1px solid rgba(125,200,232,0.25); padding:5px 14px; border-radius:100px; margin-bottom:14px; }
.section-label--navy { color:var(--navy); background:rgba(27,27,143,0.07); border-color:rgba(27,27,143,0.12); }
.section-title { font-size: clamp(26px,3.5vw,40px); margin-bottom:14px; }
.section-subtitle { font-size:16px; color:var(--text-muted); max-width:580px; line-height:1.75; }

/* ══════════════════════════════════════════════════════
   NAVIGATION
══════════════════════════════════════════════════════ */
.nav { position:fixed; top:0; left:0; right:0; z-index:1000; background:rgba(255,255,255,0.97); backdrop-filter:blur(20px); border-bottom:1px solid var(--gray-100); transition:var(--transition); }
.nav.scrolled { box-shadow:var(--shadow-md); }
.nav__inner { display:flex; align-items:center; justify-content:space-between; height:100px; gap:8px; }
.nav__logo img { height:96px; width:auto; }
.nav__links { display:flex; align-items:center; gap:2px; }
.nav__links > li { position:relative; }
.nav__links > li > a { font-family:'Nunito',sans-serif; font-weight:700; font-size:14px; color:var(--text-dark); padding:8px 12px; border-radius:var(--radius-sm); transition:var(--transition); display:flex; align-items:center; gap:4px; }
.nav__links > li > a:hover, .nav__links > li > a.active { color:var(--navy); background:var(--sky-pale); }
/* Dropdown */
.nav__dropdown { position:absolute; top:calc(100% + 8px); left:0; min-width:240px; background:var(--white); border:1px solid var(--gray-100); border-radius:var(--radius-md); box-shadow:var(--shadow-lg); padding:8px; opacity:0; visibility:hidden; transform:translateY(-8px); transition:var(--transition); z-index:100; }
.nav__links > li:hover .nav__dropdown { opacity:1; visibility:visible; transform:translateY(0); }
.nav__dropdown a { display:block; padding:10px 14px; font-size:14px; font-family:'Nunito',sans-serif; font-weight:600; color:var(--text-body); border-radius:var(--radius-sm); transition:var(--transition); }
.nav__dropdown a:hover { background:var(--sky-pale); color:var(--navy); }
.nav__dropdown-divider { height:1px; background:var(--gray-100); margin:6px 0; }
.chevron-icon { width:12px; height:12px; transition:var(--transition); }
.nav__links > li:hover .chevron-icon { transform:rotate(180deg); }
/* Nav CTA */
.nav__cta { margin-left:8px; flex-shrink:0; }
/* Burger */
.nav__burger { display:none; flex-direction:column; gap:5px; cursor:pointer; padding:8px; background:none; border:none; }
.nav__burger span { display:block; width:24px; height:2px; background:var(--navy); border-radius:2px; transition:var(--transition); }
.nav__mobile { display:none; position:fixed; top:70px; left:0; right:0; background:var(--white); border-bottom:1px solid var(--gray-100); padding:16px 24px 28px; z-index:999; box-shadow:var(--shadow-md); max-height:calc(100vh - 70px); overflow-y:auto; }
.nav__mobile.open { display:block; }
.nav__mobile a { display:block; padding:11px 0; font-family:'Nunito',sans-serif; font-weight:700; font-size:15px; color:var(--navy); border-bottom:1px solid var(--gray-100); }
.nav__mobile .nav__mobile-section { font-size:11px; font-weight:800; text-transform:uppercase; letter-spacing:0.1em; color:var(--text-muted); padding:16px 0 6px; border-bottom:none; }
.nav__mobile .btn { margin-top:16px; width:100%; justify-content:center; }

/* ══════════════════════════════════════════════════════
   BLOG CARDS
══════════════════════════════════════════════════════ */
.blog-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.blog-card { background:var(--white); border:1px solid var(--gray-200); border-radius:var(--radius-lg); overflow:hidden; transition:var(--transition); display:flex; flex-direction:column; }
.blog-card:hover { border-color:var(--sky); box-shadow:var(--shadow-md); transform:translateY(-4px); }
.blog-card__img { aspect-ratio:16/9; overflow:hidden; background:var(--gray-100); }
.blog-card__img img { width:100%; height:100%; object-fit:cover; transition:transform 0.5s ease; }
.blog-card:hover .blog-card__img img { transform:scale(1.05); }
.blog-card__body { padding:24px; flex:1; display:flex; flex-direction:column; }
.blog-card__cat { display:inline-flex; align-items:center; font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:0.08em; color:var(--sky); background:rgba(125,200,232,0.12); border:1px solid rgba(125,200,232,0.25); padding:3px 10px; border-radius:100px; margin-bottom:12px; }
.blog-card__title { font-size:17px; font-family:'Nunito',sans-serif; font-weight:800; color:var(--navy); margin-bottom:10px; line-height:1.3; }
.blog-card:hover .blog-card__title { color:var(--navy-light); }
.blog-card__excerpt { font-size:14px; color:var(--text-muted); line-height:1.7; flex:1; margin-bottom:16px; }
.blog-card__meta { display:flex; align-items:center; justify-content:space-between; font-size:12px; color:var(--text-muted); border-top:1px solid var(--gray-100); padding-top:14px; }
.blog-card__read { font-family:'Nunito',sans-serif; font-weight:700; font-size:13px; color:var(--navy); display:flex; align-items:center; gap:4px; }
.blog-card__read:hover { color:var(--sky); }

/* ══════════════════════════════════════════════════════
   PATHOLOGIE CARDS (homepage)
══════════════════════════════════════════════════════ */
.patho-zones { display:grid; grid-template-columns:repeat(4,1fr); gap:4px; border-radius:var(--radius-xl); overflow:hidden; }
.patho-zone { position:relative; aspect-ratio:3/4; overflow:hidden; cursor:pointer; }
.patho-zone__bg { width:100%; height:100%; object-fit:cover; transition:transform 0.6s ease; filter:brightness(0.55); }
.patho-zone:hover .patho-zone__bg { transform:scale(1.06); filter:brightness(0.7); }
.patho-zone__overlay { position:absolute; inset:0; background:linear-gradient(to top, rgba(19,19,106,0.85) 0%, transparent 55%); }
.patho-zone__content { position:absolute; bottom:0; left:0; right:0; padding:24px 20px; }
.patho-zone__title { font-family:'Nunito',sans-serif; font-size:20px; font-weight:900; color:var(--white); margin-bottom:6px; }
.patho-zone__sub { font-size:12px; color:var(--sky-light); font-weight:500; margin-bottom:12px; line-height:1.5; }
.patho-zone__link { display:inline-flex; align-items:center; gap:6px; font-family:'Nunito',sans-serif; font-size:13px; font-weight:700; color:var(--sky); text-transform:uppercase; letter-spacing:0.06em; }
.patho-zone__link svg { transition:transform 0.2s; }
.patho-zone:hover .patho-zone__link svg { transform:translateX(4px); }

/* ══════════════════════════════════════════════════════
   ARTICLE (page pathologie / blog)
══════════════════════════════════════════════════════ */
.article-hero { background:linear-gradient(135deg,var(--navy-dark),var(--navy)); color:var(--white); padding:56px 0 48px; margin-top:70px; }
.article-hero .section-label { color:var(--sky-light); background:rgba(125,200,232,0.15); border-color:rgba(125,200,232,0.25); }
.article-hero h1 { color:var(--white); font-size:clamp(28px,4vw,46px); max-width:780px; margin-bottom:16px; }
.article-hero__meta { display:flex; align-items:center; gap:20px; font-size:14px; color:rgba(255,255,255,0.6); flex-wrap:wrap; }
.article-hero__meta strong { color:rgba(255,255,255,0.9); }

.article-layout { display:grid; grid-template-columns:1fr 340px; gap:48px; align-items:start; padding:56px 0; }
.article-body { }
.article-body h2 { font-size:24px; margin:40px 0 14px; padding-top:8px; border-top:2px solid var(--sky-pale); }
.article-body h3 { font-size:19px; margin:28px 0 10px; color:var(--navy); }
.article-body p { font-size:16px; line-height:1.85; margin-bottom:16px; color:var(--text-body); }
.article-body ul { margin:0 0 16px 0; padding-left:20px; list-style:disc; }
.article-body ul li { font-size:16px; line-height:1.75; margin-bottom:6px; color:var(--text-body); }
.article-body strong { color:var(--navy); font-weight:700; }
.article-intro { font-size:18px; line-height:1.9; color:var(--text-body); border-left:4px solid var(--sky); padding-left:20px; margin-bottom:32px; }

/* Article sidebar */
.article-sidebar { display:flex; flex-direction:column; gap:20px; position:sticky; top:90px; }
.sidebar-card { background:var(--white); border:1px solid var(--gray-200); border-radius:var(--radius-lg); padding:28px; }
.sidebar-card--navy { background:var(--navy); color:var(--white); border-color:transparent; }
.sidebar-card h3 { font-size:16px; margin-bottom:14px; }
.sidebar-card--navy h3 { color:var(--white); }
.sidebar-card p { font-size:14px; line-height:1.7; color:var(--text-muted); margin-bottom:16px; }
.sidebar-card--navy p { color:rgba(255,255,255,0.7); }
.sidebar-card .btn { width:100%; justify-content:center; }
.sidebar-list a { display:flex; align-items:center; gap:8px; font-size:14px; color:var(--text-body); padding:8px 0; border-bottom:1px solid var(--gray-100); transition:var(--transition); font-weight:500; }
.sidebar-list a:last-child { border-bottom:none; }
.sidebar-list a:hover { color:var(--navy); padding-left:4px; }

/* FAQ */
.faq-section { margin-top:48px; }
.faq-section h2 { margin-bottom:24px; }
.faq-item { border:1px solid var(--gray-200); border-radius:var(--radius-md); margin-bottom:10px; overflow:hidden; }
.faq-item.open { border-color:var(--sky); }
.faq-question { display:flex; align-items:center; justify-content:space-between; padding:18px 24px; cursor:pointer; font-family:'Nunito',sans-serif; font-weight:700; font-size:15px; color:var(--navy); gap:12px; user-select:none; }
.faq-question:hover { background:var(--sky-pale); }
.faq-chevron { width:28px; height:28px; background:var(--sky-pale); border-radius:50%; display:flex; align-items:center; justify-content:center; flex-shrink:0; transition:var(--transition); }
.faq-item.open .faq-chevron { background:var(--navy); transform:rotate(180deg); }
.faq-chevron svg { width:14px; height:14px; color:var(--navy); transition:var(--transition); }
.faq-item.open .faq-chevron svg { color:var(--white); }
.faq-answer { display:none; padding:0 24px 20px; font-size:15px; color:var(--text-body); line-height:1.8; }
.faq-item.open .faq-answer { display:block; }

/* ══════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════ */
.footer { background:var(--navy-dark); color:rgba(255,255,255,0.65); padding:64px 0 28px; }
.footer__grid { display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:40px; margin-bottom:48px; }
.footer__brand img { height:100px; width:auto; margin-bottom:14px; }
.footer__brand p { font-size:14px; line-height:1.75; }
.footer__col h4 { font-family:'Nunito',sans-serif; font-size:13px; font-weight:800; color:var(--white); text-transform:uppercase; letter-spacing:0.08em; margin-bottom:14px; }
.footer__col a { display:block; font-size:13px; color:rgba(255,255,255,0.55); padding:4px 0; transition:var(--transition); }
.footer__col a:hover { color:var(--sky); }
.footer__bottom { border-top:1px solid rgba(255,255,255,0.1); padding-top:24px; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:12px; }
.footer__bottom a { color:rgba(255,255,255,0.4); }
.footer__bottom a:hover { color:var(--sky); }

/* ══════════════════════════════════════════════════════
   SCROLL REVEAL
══════════════════════════════════════════════════════ */
.reveal { opacity:0; transform:translateY(28px); transition:opacity 0.6s cubic-bezier(0.4,0,0.2,1), transform 0.6s cubic-bezier(0.4,0,0.2,1); }
.reveal.visible { opacity:1; transform:translateY(0); }
.reveal-delay-1 { transition-delay:0.1s; }
.reveal-delay-2 { transition-delay:0.2s; }
.reveal-delay-3 { transition-delay:0.3s; }
.reveal-delay-4 { transition-delay:0.4s; }
@media (prefers-reduced-motion:reduce) { .reveal { opacity:1; transform:none; transition:none; } }

/* ══════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════ */
@media (max-width:1024px) {
  .patho-zones { grid-template-columns:repeat(2,1fr); }
  .patho-zone { aspect-ratio:4/3; }
  .blog-grid { grid-template-columns:repeat(2,1fr); }
  .article-layout { grid-template-columns:1fr; }
  .article-sidebar { position:static; }
  .footer__grid { grid-template-columns:1fr 1fr; gap:28px; }
}
@media (max-width:768px) {
  .section { padding:56px 0; }
  .nav__links, .nav__cta { display:none; }
  .nav__burger { display:flex; }
  .patho-zones { grid-template-columns:1fr 1fr; }
  .blog-grid { grid-template-columns:1fr; }
  .footer__grid { grid-template-columns:1fr; }
  .footer__bottom { flex-direction:column; text-align:center; }
}
@media (max-width:480px) {
  .container { padding:0 16px; }
  .patho-zones { grid-template-columns:1fr; }
  .patho-zone { aspect-ratio:3/2; }
}