/* ==========================================================================
   Confort Énergie — site d'information indépendant
   Feuille de style originale. Aucune dépendance externe (pas de Google
   Fonts, pas de Font Awesome, pas de framework CSS).
   ========================================================================== */

:root {
  --ink:        #1c1a16;
  --ink-soft:   #4a463e;
  --paper:      #f7f3ea;
  --paper-alt:  #efe8d8;
  --paper-dark: #221f1a;
  --brique:     #b8431f;
  --brique-dark:#8f3216;
  --ardoise:    #2f4858;
  --ardoise-lt: #4c6b7d;
  --line:       rgba(28, 26, 22, 0.16);
  --line-lt:    rgba(247, 243, 234, 0.22);

  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --max: 1120px;
}

/* ---------- reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 400; line-height: 1.15; margin: 0 0 .5em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; }
li { list-style: none; }
button { font: inherit; }

:focus-visible {
  outline: 2px solid var(--brique);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--ink);
  color: var(--paper);
  padding: .7em 1.2em;
  z-index: 200;
}
.skip-link:focus {
  left: 1em;
  top: 1em;
}

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brique);
}

.hairline { border: none; border-top: 1px solid var(--line); margin: 0; }

/* ---------- site mark ---------- */
.mark { display: block; }
.mark path.mark-warm  { fill: var(--brique); }
.mark path.mark-cool  { fill: var(--ardoise); }
.mark circle           { fill: none; stroke: var(--ink); stroke-width: 1; }
.mark polyline          { fill: none; stroke: var(--paper); stroke-width: 2; }

/* ---------- header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
  gap: 24px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.28rem;
  color: var(--ink);
  line-height: 1.1;
}
.brand-name small {
  display: block;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: 2px;
}
.main-nav ul {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.main-nav a {
  text-decoration: none;
  font-size: .95rem;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  border-bottom-color: var(--brique);
}
.nav-cta {
  border: 1px solid var(--ink);
  padding: 8px 16px !important;
}
.nav-cta:hover { background: var(--ink); color: var(--paper); border-bottom-color: var(--ink) !important; }

/* ---------- hero ---------- */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: end;
}
.hero h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  max-width: 14ch;
  margin-top: .3em;
}
.hero-lede {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 46ch;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 13px 22px;
  text-decoration: none;
  font-size: .95rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-solid {
  background: var(--brique);
  border-color: var(--brique);
  color: var(--paper);
}
.btn-solid:hover { background: var(--brique-dark); border-color: var(--brique-dark); }

.hero-figures {
  border-left: 1px solid var(--line);
  padding-left: 28px;
  display: grid;
  gap: 18px;
}
.figure b {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  color: var(--ardoise);
}
.figure span {
  font-size: .85rem;
  color: var(--ink-soft);
}

/* ---------- section headers ---------- */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}
.section-alt { background: var(--paper-alt); }
.section-dark {
  background: var(--paper-dark);
  color: var(--paper);
  border-bottom-color: var(--line-lt);
}
.section-dark .eyebrow { color: #e0a488; }
.section-dark .hero-lede { color: rgba(247, 243, 234, .72); }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: .25em 0 0; }
.section-link {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  white-space: nowrap;
}

/* ---------- services index ---------- */
.services-index { display: grid; gap: 0; border-top: 1px solid var(--line); }
.service-row {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
}
.service-row:hover { background: rgba(184, 67, 31, 0.05); }
.service-num {
  font-family: var(--font-mono);
  color: var(--ardoise);
  font-size: .95rem;
}
.service-body h3 { font-size: 1.25rem; margin-bottom: .2em; }
.service-body p { margin: 0; color: var(--ink-soft); font-size: .95rem; max-width: 58ch; }
.service-arrow {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--brique);
}

/* ---------- why / trust ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.why-item .eyebrow { display: block; margin-bottom: .6em; }
.why-item h3 { font-size: 1.1rem; margin-bottom: .4em; }
.why-item p { color: var(--ink-soft); font-size: .95rem; }

/* ---------- article / actu cards ---------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.article-card {
  border: 1px solid var(--line);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.article-card:hover { border-color: var(--brique); }
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--ardoise);
  border: 1px solid var(--ardoise);
  padding: 3px 8px;
  width: fit-content;
}
.article-card time {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--ink-soft);
}
.article-card h3 { font-size: 1.15rem; margin: 0; }
.article-card .excerpt { color: var(--ink-soft); font-size: .92rem; margin: 0; }

.article-list { display: grid; gap: 0; border-top: 1px solid var(--line); }

/* ---------- article detail ---------- */
.article-head { padding: 56px 0 36px; border-bottom: 1px solid var(--line); }
.article-meta { display: flex; gap: 16px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }
.article-head h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); max-width: 24ch; }
.article-lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 62ch; }

.article-body {
  max-width: 68ch;
  padding: 48px 0;
  font-size: 1.05rem;
}
.article-body h2 {
  font-size: 1.4rem;
  margin-top: 1.6em;
  padding-top: .6em;
  border-top: 1px solid var(--line);
}
.article-body h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.article-body p { margin-bottom: 1.15em; }
.article-body ul { margin: 0 0 1.2em; padding-left: 1.3em; }
.article-body li { list-style: disc; margin-bottom: .4em; }
.article-body a { color: var(--brique); }

.sources-box {
  border: 1px solid var(--line);
  padding: 20px 24px;
  margin-top: 24px;
  font-size: .9rem;
}
.sources-box p:last-child { margin-bottom: 0; }
.sources-box .eyebrow { display: block; margin-bottom: .6em; }

.keywords { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 28px; }
.keywords span {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  padding: 4px 10px;
}

/* ---------- service page ---------- */
.service-head { padding: 56px 0 40px; border-bottom: 1px solid var(--line); }
.service-head .eyebrow { margin-bottom: .8em; display: block; }
.service-head h1 { font-size: clamp(2rem, 4.2vw, 3rem); max-width: 18ch; }
.service-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  padding: 56px 0;
}
.service-columns h2 { font-size: 1.3rem; }
.service-photo {
  max-width: 480px;
  border: 1px solid var(--line);
  margin-top: 28px;
}
.service-photo img { width: 100%; }
.service-photo figcaption {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--ink-soft);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}
.advantage-list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 14px;
}
.advantage-list li:last-child { border-bottom: 1px solid var(--line); }
.advantage-list .num { font-family: var(--font-mono); color: var(--brique); }

/* ---------- contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-card {
  border: 1px solid var(--line-lt);
  padding: 28px;
}
.contact-card h3 { font-size: 1.05rem; margin-bottom: .6em; }
.contact-card p { color: rgba(247,243,234,.75); }
.contact-card a { color: var(--paper); text-decoration: underline; }

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(247, 243, 234, .78);
  padding: 56px 0 28px;
  font-size: .92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(247,243,234,.16);
}
.footer-grid h4 {
  font-family: var(--font-mono);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: rgba(247,243,234,.5);
  margin-bottom: 1em;
}
.footer-grid ul li { margin-bottom: .55em; }
.footer-grid a { text-decoration: none; color: inherit; }
.footer-grid a:hover { color: var(--paper); text-decoration: underline; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .82rem;
  color: rgba(247,243,234,.5);
}
.footer-bottom a { color: inherit; }

/* ---------- plan du site ---------- */
.sitemap-section h2 {
  font-size: 1.15rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--ardoise);
  margin-bottom: .8em;
}
.sitemap-list { border-top: 1px solid var(--line); margin-bottom: 48px; }
.sitemap-list li {
  border-bottom: 1px solid var(--line);
}
.sitemap-list a {
  display: block;
  padding: 14px 0;
  text-decoration: none;
}
.sitemap-list a:hover { color: var(--brique); }
.sitemap-list small { display: block; color: var(--ink-soft); font-size: .85rem; margin-top: 2px; }

/* ---------- mentions légales ---------- */
.legal-body { max-width: 70ch; padding: 48px 0; }
.legal-body h2 { font-size: 1.2rem; margin-top: 1.6em; }
.legal-body p { color: var(--ink-soft); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-figures { border-left: none; border-top: 1px solid var(--line); padding-left: 0; padding-top: 24px; grid-auto-flow: column; grid-template-columns: repeat(3,1fr); }
  .why-grid { grid-template-columns: 1fr; gap: 28px; }
  .article-grid { grid-template-columns: 1fr; }
  .service-columns { grid-template-columns: 1fr; gap: 32px; padding: 40px 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .main-nav ul { gap: 16px; }
  .service-row { grid-template-columns: 40px 1fr; }
  .service-arrow { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-figures { grid-template-columns: 1fr; }
}