/* =====================================================
   STUDIO CREATIVE — blog.css
   Styles partagés pour toutes les pages d'articles
   ===================================================== */

:root {
  --bg:        #080b10;
  --bg2:       #0d1117;
  --bg3:       #111722;
  --cyan:      #00d4ff;
  --cyan-dim:  rgba(0,212,255,0.08);
  --blue:      #3a7bd5;
  --white:     #ffffff;
  --gray:      #8899aa;
  --gray2:     #556677;
  --font:      'Outfit', sans-serif;
  --ease-out:  cubic-bezier(0.4,0,0.2,1);
  --nav-h:     72px;
}

*, *::before, *::after { box-sizing:border-box; margin:0; padding:0 }
html { scroll-behavior:smooth }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none }
img { max-width: 100%; display: block }

/* ---- NAV ---- */
#nav {
  position: fixed; top:0; left:0; right:0; z-index:1000;
  height: var(--nav-h);
  display: flex; align-items: center;
  padding: 0 40px;
  transition: background 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}
#nav.scrolled {
  background: rgba(8,11,16,0.92);
  border-color: rgba(255,255,255,0.06);
  backdrop-filter: blur(20px);
}
.nav-inner {
  width:100%; max-width:1200px; margin:0 auto;
  display: flex; align-items: center; justify-content: space-between;
}

.nav-logo img { height:38px; display:block }
.nav-back {
  display: inline-flex; align-items: center; gap: 8px;
  margin-left: auto;
  font-size: 13px; font-weight: 500; color: var(--gray);
  padding: 8px 20px; border-radius: 50px;
  border: 1px solid rgba(136,153,170,0.2);
  background: rgba(136,153,170,0.04);
  text-decoration: none;
  transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.nav-back:hover { color: var(--white); border-color: rgba(0,212,255,0.4); background: rgba(0,212,255,0.08); }
.nav-back svg { transition: transform 0.25s; flex-shrink: 0; }
.nav-back:hover svg { transform: translateX(-3px); }

/* ---- ARTICLE HERO ---- */
.article-hero {
  padding: calc(var(--nav-h) + 80px) 0 80px;
  position: relative; overflow:hidden;
}
.article-hero::before {
  content:''; position:absolute; inset:0; z-index:0;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0,212,255,0.07), transparent);
}
.article-hero .container { position:relative; z-index:1 }
.article-label {
  display:inline-flex; align-items:center; gap:8px;
  font-size:11px; font-weight:700; letter-spacing:2px; text-transform:uppercase;
  color:var(--cyan); margin-bottom:20px;
}
.article-label::before {
  content:''; width:24px; height:2px; background:var(--cyan); border-radius:2px;
}
.article-title {
  font-size:clamp(28px,5vw,56px); font-weight:900;
  letter-spacing:-2px; line-height:1.1; margin-bottom:24px;
  max-width:780px;
}
.article-meta {
  display:flex; align-items:center; gap:20px; flex-wrap:wrap;
  font-size:13px; color:var(--gray);
}
.article-meta-author { display:flex; align-items:center; gap:8px; color:var(--white); font-weight:600 }
.article-meta-author-avatar {
  width:32px; height:32px; border-radius:50%;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  display:flex; align-items:center; justify-content:center;
  font-size:13px; font-weight:700;
}
.article-meta-sep { width:4px; height:4px; border-radius:50%; background:var(--gray2) }
.article-hero-img {
  margin-top:56px; border-radius:20px; overflow:hidden;
  height:380px; position:relative;
  border:1px solid rgba(255,255,255,0.06);
}
.article-hero-img-inner {
  position:absolute; inset:0; width:100%; height:100%;
}

/* ---- ARTICLE BODY ---- */
.article-layout {
  display:grid; grid-template-columns:1fr 280px; gap:64px;
  align-items:start; padding:80px 0 120px;
}
.article-body { max-width:720px }
.prose h2 {
  font-size:clamp(20px,3vw,28px); font-weight:800;
  letter-spacing:-0.8px; margin:48px 0 16px;
  color:var(--white);
}
.prose h3 {
  font-size:18px; font-weight:700; margin:32px 0 12px;
  color:var(--white);
}
.prose p { font-size:17px; color:#b8c8d8; line-height:1.8; margin-bottom:20px }
.prose ul, .prose ol {
  margin:0 0 20px 0; padding-left:24px;
  display:flex; flex-direction:column; gap:10px;
}
.prose li { font-size:16px; color:#b8c8d8; line-height:1.7 }
.prose strong { color:var(--white); font-weight:700 }
.prose a { color:var(--cyan); border-bottom:1px solid rgba(0,212,255,0.3); transition:border-color 0.2s }
.prose a:hover { border-color:var(--cyan) }

/* Code inline */
.prose code {
  font-family:'Courier New', monospace; font-size:14px;
  background:rgba(0,212,255,0.08); color:var(--cyan);
  padding:2px 8px; border-radius:5px; border:1px solid rgba(0,212,255,0.15);
}

/* Code block */
.prose pre {
  background:var(--bg2); border:1px solid rgba(255,255,255,0.08);
  border-radius:14px; padding:28px 32px; margin:28px 0;
  overflow-x:auto; position:relative;
}
.prose pre::before {
  content:attr(data-lang); position:absolute; top:12px; right:16px;
  font-size:10px; font-weight:700; letter-spacing:1.5px; text-transform:uppercase;
  color:var(--gray2);
}
.prose pre code {
  background:none; border:none; padding:0; color:#c8d8e8; font-size:14px; line-height:1.7
}

/* Callout / blockquote */
.callout {
  margin:32px 0; padding:24px 28px;
  background:rgba(0,212,255,0.05); border-left:3px solid var(--cyan);
  border-radius:0 12px 12px 0;
}
.callout-title { font-size:12px; font-weight:700; letter-spacing:1.5px; text-transform:uppercase; color:var(--cyan); margin-bottom:8px }
.callout p { font-size:15px; color:#b8c8d8; margin:0 }

/* Separator */
.prose hr { border:none; border-top:1px solid rgba(255,255,255,0.07); margin:40px 0 }

/* Step / numbered item */
.step {
  display:flex; gap:20px; align-items:flex-start;
  margin:24px 0; padding:24px; border-radius:14px;
  background:var(--bg3); border:1px solid rgba(255,255,255,0.06);
}
.step-num {
  width:36px; height:36px; border-radius:50%; flex-shrink:0;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  display:flex; align-items:center; justify-content:center;
  font-size:15px; font-weight:800;
}
.step-content h4 { font-size:16px; font-weight:700; margin-bottom:6px }
.step-content p  { font-size:14px; color:var(--gray); margin:0 }

/* ---- SIDEBAR ---- */
.article-sidebar { position:sticky; top:calc(var(--nav-h) + 32px) }
.sidebar-card {
  background:var(--bg3); border:1px solid rgba(255,255,255,0.07);
  border-radius:16px; padding:28px; margin-bottom:20px;
}
.sidebar-title { font-size:11px; font-weight:700; letter-spacing:1.5px; text-transform:uppercase; color:var(--gray); margin-bottom:16px }
.toc-list { list-style:none; padding:0; display:flex; flex-direction:column; gap:8px }
.toc-list li a {
  font-size:13px; color:var(--gray); transition:color 0.2s; display:block;
  padding:4px 0; border-left:2px solid transparent; padding-left:12px;
  transition:color 0.2s, border-color 0.2s;
}
.toc-list li a:hover { color:var(--white); border-color:var(--cyan) }
.toc-list li a.active { color:var(--cyan); border-color:var(--cyan) }
.tag-chip {
  display:inline-block; padding:4px 12px; border-radius:50px;
  font-size:11px; font-weight:700; letter-spacing:1.5px; text-transform:uppercase;
  background:var(--cyan-dim); color:var(--cyan); border:1px solid rgba(0,212,255,0.2);
  margin-bottom:8px;
}

/* ---- CTA BOTTOM ---- */
.article-cta {
  padding:80px 0; background:var(--bg2);
  border-top:1px solid rgba(255,255,255,0.05);
  text-align:center;
}
.article-cta h2 { font-size:clamp(24px,3.5vw,40px); font-weight:900; letter-spacing:-1px; margin-bottom:12px }
.article-cta p { font-size:16px; color:var(--gray); margin-bottom:32px }
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 32px; border-radius:50px; font-family:var(--font);
  font-size:14px; font-weight:700; letter-spacing:0.3px;
  transition:transform 0.3s, box-shadow 0.3s, background 0.3s;
  cursor:pointer; border:none;
}
.btn-primary {
  background:linear-gradient(135deg,var(--blue),var(--cyan)); color:var(--white);
}
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 16px 40px rgba(0,212,255,0.35) }
.btn-outline {
  background:transparent; color:var(--white);
  border:1px solid rgba(255,255,255,0.2);
}
.btn-outline:hover { border-color:var(--cyan); color:var(--cyan) }

/* ---- FOOTER ---- */
footer { padding:60px 0; background:var(--bg2); border-top:1px solid rgba(255,255,255,0.05) }
.footer-inner { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:24px }
.footer-logo img { height:40px; opacity:0.85; transition:opacity 0.3s }
.footer-logo img:hover { opacity:1 }
.footer-links { display:flex; gap:28px; flex-wrap:wrap }
.footer-links a { font-size:13px; color:var(--gray); transition:color 0.3s }
.footer-links a:hover { color:var(--white) }
.footer-copy { font-size:12px; color:var(--gray2); letter-spacing:0.5px }
.footer-copy span { color:var(--cyan) }
.footer-legal { font-size:11px; margin-top:8px }
.footer-legal a { color:var(--gray2); text-decoration:none; transition:color 0.2s }
.footer-legal a:hover { color:var(--cyan) }
@media (max-width:768px) {
  .footer-inner { flex-direction:column; text-align:center }
}

/* ---- CONTAINER ---- */
.container { max-width:1200px; margin:0 auto; padding:0 40px }

/* ---- RESPONSIVE ---- */
@media(max-width:900px) {
  .article-layout { grid-template-columns:1fr; gap:40px }
  .article-sidebar { position:static }
}
@media(max-width:600px) {
  .container { padding:0 20px }
  #nav { padding:0 20px }
  .article-hero-img { height:220px }
  .article-title { letter-spacing:-1px }
}