/* ══════════════════════════════════════
   BLOG — shared stylesheet
   Variables et composants header/footer repris d'index.html
══════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #FAF7F2;
  --bg-alt:  #F0EBE3;
  --ink:     #1A1A1A;
  --ink-2:   #3D3D3A;
  --ink-3:   #6B6860;
  --accent:  #C8553D;
  --bd:      rgba(26,26,26,.10);
  --bd-s:    rgba(26,26,26,.18);
  --surface: #fff;
  --surface-2: #F0EBE3;
  --wordmark-accent: #B34A30;
  --wordmark-accent-ft: #A83F25;
  --serif:   'Instrument Serif', Georgia, serif;
  --sans:    'IBM Plex Sans', 'Helvetica Neue', sans-serif;
  --mono:    'IBM Plex Mono', 'Courier New', monospace;
  --max:     1200px;
  --px:      clamp(1.25rem, 5vw, 3.75rem);
}

[data-theme="dark"] {
  --bg:      #0E0D0B;
  --bg-alt:  #161410;
  --ink:     #ECE8DF;
  --ink-2:   #B0A99C;
  --ink-3:   #6E6860;
  --accent:  #D4644A;
  --bd:      rgba(236,232,223,.10);
  --bd-s:    rgba(236,232,223,.18);
  --surface: #1A1816;
  --surface-2: #1A1816;
  --wordmark-accent: #D4644A;
  --wordmark-accent-ft: #D4644A;
  color-scheme: dark;
}

html { transition: background-color .25s ease, color .25s ease; }
body, header, footer, section { transition: background-color .25s ease, color .25s ease, border-color .25s ease; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 500;
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

p { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }

.serif { font-family: var(--serif); font-weight: 400; }
.t-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

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

.lnk-text {
  font-size: .875rem;
  color: var(--ink-2);
  border-bottom: 1px solid var(--bd-s);
  padding-bottom: .06em;
  transition: color .15s, border-color .15s;
}
.lnk-text:hover { color: var(--accent); border-color: var(--accent); }

/* ── HEADER ── */
header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--bd);
}
.hdr {
  display: flex; align-items: center; justify-content: space-between;
  height: 3.5rem;
  max-width: var(--max); margin: 0 auto; padding: 0 var(--px);
}
.wordmark {
  font-family: var(--sans); font-weight: 600;
  font-size: .82rem; letter-spacing: .08em; text-transform: uppercase;
}
.wordmark em { font-style: normal; color: var(--wordmark-accent); }

nav.main { display: flex; align-items: center; gap: 2rem; }
nav.main a { font-size: .82rem; color: var(--ink-2); transition: color .15s; }
nav.main a:hover { color: var(--accent); }
.nav-cta {
  font-weight: 500; color: var(--ink) !important;
  border-bottom: 1px solid currentColor; padding-bottom: .05em;
}
.nav-cta:hover { color: var(--accent) !important; }
.lang-toggle { background: none; border: 1px solid var(--bd-s); cursor: pointer; font-size: .75rem; font-family: var(--sans); font-weight: 600; color: var(--ink-2); padding: .2em .55em; letter-spacing: .06em; transition: color .15s, border-color .15s; line-height: 1.5; }
.lang-toggle:hover { color: var(--accent); border-color: var(--accent); }

.burger {
  display: none; background: none; border: none; cursor: pointer;
  flex-direction: column; gap: 5px; padding: .25rem;
}
.burger span { display: block; width: 22px; height: 1.5px; background: var(--ink); transition: .2s; }

.theme-toggle {
  background: none; border: 1px solid var(--bd-s); cursor: pointer;
  width: 1.85rem; height: 1.85rem; padding: 0; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink-2); transition: color .18s, border-color .18s, background .18s, transform .35s;
  line-height: 0; flex-shrink: 0;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle svg { width: 14px; height: 14px; display: block; }
.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle { transform: rotate(180deg); }

/* ── FOOTER ── */
footer {
  background: var(--bg-alt); border-top: 1px solid var(--bd);
  padding: 3rem 0 2rem;
}
.ft-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 3rem; }
.ft-brand .wordmark { margin-bottom: .6rem; }
.ft-brand .wordmark em { color: var(--wordmark-accent-ft); }
.ft-brand p { font-size: .82rem; color: var(--ink-3); line-height: 1.65; }
.ft-col h4, .ft-nav-label { font-size: .68rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); margin-bottom: .75rem; }
.ft-col ul { list-style: none; display: flex; flex-direction: column; gap: .35rem; }
.ft-col li a { font-size: .82rem; color: var(--ink-2); transition: color .15s; }
.ft-col li a:hover { color: var(--accent); }
.ft-bottom {
  margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--bd);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem;
}
.ft-bottom p { font-size: .75rem; color: var(--ink-3); }

/* ── BLOG LISTING ── */
.blog-hero { padding: clamp(3rem, 6vw, 4.5rem) 0 clamp(1.5rem, 3vw, 2.5rem); }
.blog-hero h1 {
  font-family: var(--sans); font-weight: 700;
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -.03em; line-height: 1.08;
  margin: .75rem 0 .75rem;
}
.blog-hero p { color: var(--ink-2); max-width: 60ch; }

.post-list { padding: 0 0 clamp(4rem, 8vw, 6.5rem); }
.post-card {
  display: block;
  padding: 2rem 0;
  border-top: 1px solid var(--bd);
}
.post-card:last-child { border-bottom: 1px solid var(--bd); }
.post-card h2 {
  font-family: var(--sans); font-weight: 600;
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  letter-spacing: -.02em; line-height: 1.25;
  margin: .35rem 0 .5rem;
  transition: color .15s;
}
.post-card:hover h2 { color: var(--accent); }
.post-card p { font-size: 1rem; color: var(--ink-2); line-height: 1.65; max-width: 68ch; }

.post-meta {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  font-family: var(--mono); font-size: .75rem; color: var(--ink-3);
}
.post-tags { display: inline-flex; gap: .5rem; flex-wrap: wrap; }
.post-tag {
  font-family: var(--mono); font-size: .68rem; color: var(--ink-3);
  border: 1px solid var(--bd-s); padding: .1em .55em;
}

/* ── ARTICLE ── */
.post { padding: clamp(3rem, 6vw, 4.5rem) 0 clamp(4rem, 8vw, 6.5rem); }
.post-header { max-width: 68ch; margin: 0 auto 2.5rem; }
.post-header h1 {
  font-family: var(--sans); font-weight: 700;
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  letter-spacing: -.03em; line-height: 1.12;
  margin: .75rem 0 1rem;
}

.post-body { max-width: 68ch; margin: 0 auto; }
.post-body > * + * { margin-top: 1.1em; }
.post-body h2 {
  font-family: var(--sans); font-weight: 600;
  font-size: clamp(1.35rem, 2.2vw, 1.6rem);
  letter-spacing: -.02em; line-height: 1.2;
  margin-top: 2em;
}
.post-body h3 {
  font-family: var(--sans); font-weight: 600;
  font-size: clamp(1.1rem, 1.5vw, 1.25rem);
  letter-spacing: -.01em;
  margin-top: 1.6em;
}
.post-body p, .post-body li { color: var(--ink); line-height: 1.7; }
.post-body ul, .post-body ol { padding-left: 1.3em; }
.post-body li + li { margin-top: .35em; }
.post-body a { color: var(--accent); border-bottom: 1px solid currentColor; padding-bottom: .03em; }
.post-body a:hover { opacity: .8; }
.post-body strong { font-weight: 600; }
.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding: .25em 0 .25em 1.25rem;
  color: var(--ink-2);
  font-style: italic;
}
.post-body code {
  font-family: var(--mono); font-size: .85em;
  background: var(--bg-alt); padding: .12em .4em;
}
.post-body pre {
  background: var(--bg-alt); border: 1px solid var(--bd);
  padding: 1rem 1.25rem; overflow-x: auto;
  font-size: .82rem; line-height: 1.6;
}
.post-body pre code { background: none; padding: 0; font-size: inherit; }
.post-body img { max-width: 100%; height: auto; }
.post-body hr { border: none; border-top: 1px solid var(--bd); }

.post-footer {
  max-width: 68ch; margin: 3rem auto 0;
  padding-top: 1.5rem; border-top: 1px solid var(--bd);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  nav.main { display: none; }
  nav.main.open {
    display: flex; flex-direction: column; position: absolute;
    top: 3.5rem; left: 0; right: 0; background: var(--bg);
    border-bottom: 1px solid var(--bd);
    padding: 1.5rem var(--px); gap: 1.25rem; z-index: 99;
  }
  .burger { display: flex; }
  .ft-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 580px) {
  body { font-size: 1.0625rem; }
  .ft-grid { grid-template-columns: 1fr; }
}