/* ===================================================================
   MANGER DURABLEMENT — Terroir Moderne Design System
   Palette : vert forêt · terracotta · crème chaude · doré blé
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* ── Variables ─────────────────────────────────────────────────────── */
:root {
  --c-primary:       #3b6e36;
  --c-primary-dark:  #2a5026;
  --c-primary-light: #5a9a52;
  --c-primary-xlt:   #edf7ea;
  --c-secondary:     #c8603a;
  --c-secondary-lt:  #fdf1ec;
  --c-accent:        #e4b840;
  --c-accent-lt:     #fdf6e3;
  --c-bg:            #f6f3ed;
  --c-bg-card:       #ffffff;
  --c-bg-dark:       #1c2a1d;
  --c-bg-footer:     #14201a;
  --c-text:          #1c2a1d;
  --c-text-mid:      #4a6050;
  --c-text-light:    #7a9380;
  --c-border:        #d8e8d2;
  --c-shadow-sm:     0 2px 8px rgba(58,110,54,.08);
  --c-shadow-md:     0 4px 20px rgba(58,110,54,.12);
  --c-shadow-lg:     0 8px 40px rgba(58,110,54,.16);

  --f-serif:  'Playfair Display', Georgia, serif;
  --f-sans:   'Inter', system-ui, -apple-system, sans-serif;

  --r-sm:  6px;
  --r-md:  12px;
  --r-lg:  20px;
  --r-xl:  32px;
  --r-pill: 999px;

  --max-w:  1200px;
  --gap:    1.5rem;
  --gap-lg: 2.5rem;

  --nav-h:  72px;
}

/* ── Reset ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--f-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── Typography ────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: var(--f-serif);
  line-height: 1.25;
  color: var(--c-text);
}
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); font-weight: 600; }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.55rem); font-weight: 600; }
h4 { font-size: 1.15rem; font-weight: 600; }
p  { margin-bottom: 1.1em; }
p:last-child { margin-bottom: 0; }

.article-content h2 { margin: 2rem 0 .8rem; color: var(--c-primary-dark); }
.article-content h3 { margin: 1.6rem 0 .6rem; }
.article-content ul,
.article-content ol  { padding-left: 1.4rem; margin-bottom: 1.2em; }
.article-content li  { margin-bottom: .4em; }
.article-content ul  { list-style: disc; }
.article-content ol  { list-style: decimal; }
.article-content a   { color: var(--c-primary); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--c-primary-dark); }
.article-content strong { font-weight: 600; color: var(--c-primary-dark); }

/* Callout block */
.article-content .callout {
  background: var(--c-primary-xlt);
  border-left: 4px solid var(--c-primary);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--r-md) var(--r-md) 0;
  margin: 1.5rem 0;
  font-size: .95rem;
}
.article-content .callout-title {
  font-weight: 600;
  color: var(--c-primary-dark);
  margin-bottom: .4rem;
  font-family: var(--f-sans);
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* Quote block */
.article-content blockquote {
  border-left: 4px solid var(--c-accent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-style: italic;
  font-family: var(--f-serif);
  font-size: 1.1rem;
  color: var(--c-text-mid);
  background: var(--c-accent-lt);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

/* ── Layout ────────────────────────────────────────────────────────── */
.container {
  width: min(var(--max-w), 100% - 2 * var(--gap));
  margin-inline: auto;
}

.section {
  padding-block: 4rem;
}

.section--alt {
  background: var(--c-bg-card);
}

.section--dark {
  background: var(--c-primary-dark);
  color: #fff;
}

/* Sidebar layout */
.layout-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--gap-lg);
  align-items: start;
}

/* Grid utilities */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

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

/* ── Buttons ───────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .7rem 1.5rem;
  border-radius: var(--r-pill);
  font-family: var(--f-sans);
  font-size: .9rem;
  font-weight: 500;
  transition: all .2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 2px 12px rgba(59,110,54,.3);
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(59,110,54,.35);
}

.btn-secondary {
  background: transparent;
  color: var(--c-primary);
  border: 1.5px solid var(--c-primary);
}
.btn-secondary:hover {
  background: var(--c-primary-xlt);
  border-color: var(--c-primary-dark);
  color: var(--c-primary-dark);
}

.btn-white {
  background: #fff;
  color: var(--c-primary-dark);
  box-shadow: var(--c-shadow-sm);
}
.btn-white:hover {
  background: var(--c-primary-xlt);
  transform: translateY(-1px);
}

.btn-ghost {
  background: rgba(255,255,255,.12);
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.3);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.22);
}

/* ── Tags / Pills ──────────────────────────────────────────────────── */
.tag {
  display: inline-block;
  padding: .25rem .75rem;
  border-radius: var(--r-pill);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.tag-green   { background: var(--c-primary-xlt); color: var(--c-primary-dark); }
.tag-terra   { background: var(--c-secondary-lt); color: var(--c-secondary); }
.tag-gold    { background: var(--c-accent-lt);    color: #a07a00; }
.tag-dark    { background: var(--c-primary-dark); color: #fff; }

/* ── Navigation ────────────────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(246,243,237,.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  transition: box-shadow .25s;
}

.site-nav.scrolled {
  box-shadow: 0 2px 20px rgba(58,110,54,.1);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--f-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-primary-dark);
  line-height: 1.2;
}

.nav-logo-icon {
  width: 38px; height: 38px;
  background: var(--c-primary);
  border-radius: 50%;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.nav-logo-icon svg { width: 20px; height: 20px; fill: #fff; }

.nav-logo-text small {
  display: block;
  font-family: var(--f-sans);
  font-size: .65rem;
  font-weight: 400;
  color: var(--c-text-mid);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.nav-links a,
.nav-dropdown > button {
  padding: .45rem .8rem;
  border-radius: var(--r-md);
  font-size: .875rem;
  font-weight: 500;
  color: var(--c-text-mid);
  transition: all .2s;
}

.nav-links a:hover,
.nav-dropdown > button:hover,
.nav-links a.active {
  color: var(--c-primary);
  background: var(--c-primary-xlt);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > button {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
}

.nav-dropdown::after {
  content: '';
  position: absolute;
  left: -12px;
  right: -12px;
  top: 100%;
  height: 14px;
  display: block;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  z-index: 250;
  min-width: 280px;
  max-width: min(340px, calc(100vw - 2rem));
  padding: .55rem;
  margin-top: .6rem;
  background:
    linear-gradient(180deg, rgba(255,255,255,.98), rgba(255,255,255,.94)),
    var(--c-bg-card);
  border: 1px solid rgba(216,232,210,.95);
  border-radius: var(--r-lg);
  box-shadow:
    0 22px 55px rgba(28,42,29,.16),
    0 8px 20px rgba(58,110,54,.10),
    inset 0 1px 0 rgba(255,255,255,.9);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(8px) scale(.985);
  transform-origin: top center;
  transition:
    opacity .18s ease,
    visibility .18s ease,
    transform .18s ease;
}

.nav-dropdown-menu::before {
  content: '';
  position: absolute;
  top: -7px;
  left: 50%;
  width: 14px;
  height: 14px;
  background: var(--c-bg-card);
  border-left: 1px solid rgba(216,232,210,.95);
  border-top: 1px solid rgba(216,232,210,.95);
  transform: translateX(-50%) rotate(45deg);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0) scale(1);
}

.nav-dropdown-menu li {
  position: relative;
  z-index: 1;
}

.nav-dropdown-menu a {
  position: relative;
  display: block;
  padding: .72rem .9rem;
  border-radius: var(--r-md);
  font-size: .875rem;
  line-height: 1.35;
  color: var(--c-text);
  transition:
    background .16s ease,
    color .16s ease,
    transform .16s ease;
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a:focus-visible {
  background: var(--c-primary-xlt);
  color: var(--c-primary-dark);
  transform: translateX(3px);
  outline: none;
}

.nav-dropdown-menu a small {
  display: block;
  margin-top: .18rem;
  color: var(--c-text-light);
  font-size: .74rem;
  line-height: 1.35;
  font-style: normal;
}

.nav-dropdown-menu a:hover small,
.nav-dropdown-menu a:focus-visible small {
  color: var(--c-text-mid);
}

.nav-cta {
  margin-left: .5rem;
}

/* Hamburger */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: .5rem;
  border-radius: var(--r-sm);
}
.nav-burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: all .25s;
}
.nav-burger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Mobile menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: var(--c-bg-card);
  border-bottom: 1px solid var(--c-border);
  padding: 1.5rem var(--gap);
  box-shadow: var(--c-shadow-lg);
  z-index: 99;
}

.nav-mobile.open { display: block; }

.nav-mobile a {
  display: block;
  padding: .7rem 0;
  border-bottom: 1px solid var(--c-border);
  font-size: .95rem;
  color: var(--c-text-mid);
  font-weight: 500;
}

.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover { color: var(--c-primary); }

/* ── Hero Slideshow ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  height: 100vh;
  min-height: 560px;
  max-height: 860px;
  overflow: hidden;
  margin-top: var(--nav-h);
}

.hero-slides {
  position: relative;
  height: 100%;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity .9s ease;
  display: flex;
  align-items: flex-end;
}

/* Gradient fallback backgrounds per slide */
.hero-slide:nth-child(1) { background-color: #2a5026; }
.hero-slide:nth-child(2) { background-color: #3a5e28; }
.hero-slide:nth-child(3) { background-color: #1f3b1a; }

.hero-slide.active { opacity: 1; }

.hero-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(14,24,14,.78) 0%,
    rgba(14,24,14,.35) 45%,
    rgba(14,24,14,.1)  100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 3rem var(--gap) 5rem;
  width: 100%;
}

.hero-content .container { max-width: 780px; margin: 0 auto; }

.hero-tag {
  display: inline-block;
  background: var(--c-accent);
  color: var(--c-text);
  padding: .3rem .9rem;
  border-radius: var(--r-pill);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--f-serif);
  font-size: clamp(1.7rem, 4.5vw, 3rem);
  color: #fff;
  line-height: 1.2;
  margin-bottom: 1.1rem;
  text-shadow: 0 2px 12px rgba(0,0,0,.3);
}

.hero-desc {
  color: rgba(255,255,255,.85);
  font-size: 1rem;
  margin-bottom: 1.6rem;
  max-width: 540px;
  line-height: 1.65;
}

.hero-btns {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}

/* Hero controls */
.hero-controls {
  position: absolute;
  bottom: 1.8rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: .6rem;
}

.hero-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,.4);
  transition: all .3s;
  cursor: pointer;
}

.hero-dot.active {
  width: 24px;
  border-radius: 4px;
  background: var(--c-accent);
}

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 44px; height: 44px;
  background: rgba(255,255,255,.12);
  border: 1.5px solid rgba(255,255,255,.25);
  border-radius: 50%;
  color: #fff;
  display: grid;
  place-items: center;
  transition: all .2s;
  backdrop-filter: blur(4px);
}

.hero-arrow:hover { background: rgba(255,255,255,.25); }
.hero-prev { left: var(--gap); }
.hero-next { right: var(--gap); }

/* ── Section intros ─────────────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--c-primary);
  margin-bottom: .5rem;
}

.section-header h2 {
  margin-bottom: .6rem;
}

.section-header p {
  max-width: 560px;
  margin-inline: auto;
  color: var(--c-text-mid);
  font-size: .975rem;
}

/* ── Cards ─────────────────────────────────────────────────────────── */
.card {
  background: var(--c-bg-card);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--c-shadow-sm);
  border: 1px solid var(--c-border);
  transition: all .25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-shadow-md);
  border-color: transparent;
}

.card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--c-primary-xlt);
  position: relative;
}

.card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.card:hover .card-img img { transform: scale(1.04); }

/* Placeholder when no image */
.card-img-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--c-primary-xlt), var(--c-primary-light) 80%);
  display: grid;
  place-items: center;
}
.card-img-placeholder svg { width: 48px; height: 48px; opacity: .35; fill: var(--c-primary-dark); }

.card-body {
  padding: 1.25rem 1.4rem 1.5rem;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .65rem;
  flex-wrap: wrap;
}

.card-date {
  font-size: .75rem;
  color: var(--c-text-light);
}

.card-title {
  font-family: var(--f-serif);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: .6rem;
  color: var(--c-text);
  transition: color .2s;
}

.card:hover .card-title { color: var(--c-primary); }

.card-excerpt {
  font-size: .875rem;
  color: var(--c-text-mid);
  line-height: 1.6;
  margin-bottom: .9rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-read-more {
  font-size: .825rem;
  font-weight: 600;
  color: var(--c-primary);
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  transition: gap .2s;
}

.card-read-more:hover { gap: .55rem; }
.card-read-more svg { width: 14px; height: 14px; }

/* Pillar card variant */
.pillar-card {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--c-primary-dark);
  display: flex;
  align-items: flex-end;
  transition: transform .25s, box-shadow .25s;
}

.pillar-card:hover { transform: translateY(-4px); box-shadow: var(--c-shadow-lg); }

.pillar-card-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform .4s ease;
}

.pillar-card:hover .pillar-card-bg { transform: scale(1.05); }

.pillar-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(14,24,14,.82) 0%, rgba(14,24,14,.2) 60%, transparent 100%);
}

.pillar-card-body {
  position: relative;
  z-index: 1;
  padding: 1.4rem;
}

.pillar-card-body h3 {
  color: #fff;
  font-size: 1.15rem;
  margin-bottom: .4rem;
  line-height: 1.25;
}

.pillar-card-body p {
  color: rgba(255,255,255,.75);
  font-size: .825rem;
  margin-bottom: .8rem;
  line-height: 1.5;
}

.pillar-card-body .btn {
  font-size: .8rem;
  padding: .45rem 1rem;
}

/* ── Homepage intro section ─────────────────────────────────────────── */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.intro-text .overline {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--c-secondary);
  font-weight: 600;
  display: block;
  margin-bottom: .6rem;
}

.intro-text h2 { margin-bottom: 1rem; }
.intro-text p   { color: var(--c-text-mid); margin-bottom: 1rem; }

.intro-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.intro-stat {
  text-align: center;
  padding: 1rem;
  background: var(--c-primary-xlt);
  border-radius: var(--r-md);
}

.intro-stat strong {
  display: block;
  font-family: var(--f-serif);
  font-size: 1.6rem;
  color: var(--c-primary);
  line-height: 1;
  margin-bottom: .25rem;
}

.intro-stat span {
  font-size: .75rem;
  color: var(--c-text-mid);
}

.intro-visual {
  border-radius: var(--r-xl);
  overflow: hidden;
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, var(--c-primary-xlt) 0%, #c8e6c2 100%);
  position: relative;
}

.intro-visual img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* ── Tool CTA Banner ────────────────────────────────────────────────── */
.tool-banner {
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, #1e4a1a 100%);
  border-radius: var(--r-xl);
  padding: 2.5rem 3rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.tool-banner::before {
  content: '';
  position: absolute;
  right: -60px; top: -60px;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
}

.tool-banner::after {
  content: '';
  position: absolute;
  right: 80px; bottom: -80px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(228,184,64,.08);
}

.tool-banner-label {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--c-accent);
  font-weight: 600;
  display: block;
  margin-bottom: .5rem;
}

.tool-banner h2 {
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: .5rem;
}

.tool-banner p {
  color: rgba(255,255,255,.72);
  font-size: .9rem;
  margin: 0;
}

/* ── Expert bio teaser ──────────────────────────────────────────────── */
.expert-teaser {
  display: flex;
  gap: 2rem;
  align-items: center;
  background: var(--c-bg-card);
  border-radius: var(--r-xl);
  padding: 2rem 2.5rem;
  border: 1px solid var(--c-border);
}

.expert-avatar {
  width: 90px; height: 90px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--c-primary-xlt);
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--c-primary-xlt), #c8e6c2);
}

.expert-info h3 { margin-bottom: .25rem; font-size: 1.15rem; }
.expert-info .role {
  font-size: .8rem;
  color: var(--c-primary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .5rem;
}
.expert-info p { color: var(--c-text-mid); font-size: .875rem; }

/* ── Breadcrumb ─────────────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .8rem;
  color: var(--c-text-light);
  padding: 1rem 0;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--c-text-light); transition: color .2s; }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb .sep { opacity: .5; }
.breadcrumb .current { color: var(--c-text-mid); }

/* ── Page header ────────────────────────────────────────────────────── */
.page-header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 2.5rem;
}

.page-header .tag { margin-bottom: .75rem; }
.page-header h1 { margin-bottom: .75rem; max-width: 720px; }
.page-header .lead {
  font-size: 1.05rem;
  color: var(--c-text-mid);
  max-width: 640px;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.page-header-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: .8rem;
  color: var(--c-text-light);
}

.page-header-meta strong { color: var(--c-text-mid); font-weight: 500; }

/* ── Featured image (pilier / article) ─────────────────────────────── */
.featured-img {
  border-radius: var(--r-xl);
  overflow: hidden;
  aspect-ratio: 16/7;
  background: linear-gradient(135deg, var(--c-primary-xlt) 0%, #c8e6c2 100%);
  margin-bottom: 2.5rem;
}

.featured-img img { width: 100%; height: 100%; object-fit: cover; }

/* ── Table of contents ──────────────────────────────────────────────── */
.toc {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 1.25rem 1.4rem;
  margin-bottom: 2rem;
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
}

.toc-title {
  font-family: var(--f-sans);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 600;
  color: var(--c-text-mid);
  margin-bottom: .8rem;
}

.toc ol {
  list-style: none;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
  margin-bottom: .4rem;
}

.toc li::before {
  content: counter(toc) ". ";
  color: var(--c-primary);
  font-weight: 600;
  font-size: .8rem;
}

.toc a {
  font-size: .85rem;
  color: var(--c-text-mid);
  transition: color .2s;
  line-height: 1.4;
}

.toc a:hover { color: var(--c-primary); }

/* ── Sidebar ─────────────────────────────────────────────────────── */
.sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-block {
  background: var(--c-bg-card);
  border-radius: var(--r-lg);
  padding: 1.25rem 1.4rem;
  border: 1px solid var(--c-border);
}

.sidebar-block-title {
  font-family: var(--f-sans);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 600;
  color: var(--c-text-mid);
  margin-bottom: 1rem;
  padding-bottom: .6rem;
  border-bottom: 2px solid var(--c-primary-xlt);
}

/* Sidebar guide links */
.sidebar-guides a {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .55rem 0;
  border-bottom: 1px solid var(--c-border);
  font-size: .875rem;
  color: var(--c-text);
  transition: color .2s, padding-left .2s;
}
.sidebar-guides a:last-child { border-bottom: none; }
.sidebar-guides a:hover { color: var(--c-primary); padding-left: .3rem; }
.sidebar-guides a span { font-size: .7rem; color: var(--c-text-light); margin-top: .1rem; display: block; }

.sidebar-guides a .ico {
  width: 32px; height: 32px;
  background: var(--c-primary-xlt);
  border-radius: var(--r-sm);
  flex-shrink: 0;
  display: grid;
  place-items: center;
  font-size: 1rem;
}

/* Sidebar recent articles */
.sidebar-articles li + li { margin-top: .8rem; padding-top: .8rem; border-top: 1px solid var(--c-border); }

.sidebar-articles a {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: .7rem;
  font-size: .825rem;
  color: var(--c-text);
  transition: color .2s;
}
.sidebar-articles a:hover { color: var(--c-primary); }

.sidebar-articles .thumb {
  width: 56px; height: 44px;
  border-radius: var(--r-sm);
  object-fit: cover;
  background: var(--c-primary-xlt);
}

.sidebar-articles strong {
  font-weight: 500;
  line-height: 1.35;
  display: block;
}

.sidebar-articles time {
  font-size: .72rem;
  color: var(--c-text-light);
  margin-top: .1rem;
  display: block;
}

/* Sidebar about block */
.sidebar-about { text-align: center; }
.sidebar-about img {
  width: 68px; height: 68px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto .75rem;
  border: 2px solid var(--c-primary-xlt);
  background: linear-gradient(135deg, var(--c-primary-xlt), #c8e6c2);
}
.sidebar-about strong { display: block; font-size: .9rem; margin-bottom: .2rem; }
.sidebar-about span { font-size: .775rem; color: var(--c-text-light); display: block; margin-bottom: .65rem; }
.sidebar-about p { font-size: .825rem; color: var(--c-text-mid); margin-bottom: .75rem; }

/* ── Author block ───────────────────────────────────────────────────── */
.author-block {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.25rem;
  align-items: start;
  background: var(--c-primary-xlt);
  border-radius: var(--r-lg);
  padding: 1.4rem;
  margin: 2.5rem 0;
}

.author-block img {
  width: 80px; height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--c-primary-light);
  background: linear-gradient(135deg, #c8e6c2, var(--c-primary-light));
}

.author-block-info { }
.author-block-info .label {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--c-primary);
  font-weight: 600;
  margin-bottom: .2rem;
}
.author-block-info h4 { font-size: 1rem; margin-bottom: .2rem; }
.author-block-info .role { font-size: .8rem; color: var(--c-text-mid); margin-bottom: .5rem; }
.author-block-info p { font-size: .85rem; color: var(--c-text-mid); line-height: 1.6; }

/* ── Blog page ──────────────────────────────────────────────────────── */
.blog-hero {
  background: linear-gradient(135deg, var(--c-primary-dark) 0%, #2a5226 100%);
  padding: 4rem 0 3rem;
  text-align: center;
  color: #fff;
  margin-top: var(--nav-h);
}

.blog-hero h1 { color: #fff; margin-bottom: .5rem; }
.blog-hero p  { color: rgba(255,255,255,.75); max-width: 520px; margin: 0 auto; }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: .4rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: var(--r-md);
  font-size: .875rem;
  font-weight: 500;
  border: 1.5px solid var(--c-border);
  color: var(--c-text-mid);
  transition: all .2s;
}

.pagination a:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: var(--c-primary-xlt);
}

.pagination .current {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}

/* ── Contact form ───────────────────────────────────────────────────── */
.contact-wrap {
  max-width: 640px;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 500;
  margin-bottom: .4rem;
  color: var(--c-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: .75rem 1rem;
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-md);
  background: var(--c-bg-card);
  color: var(--c-text);
  font-family: var(--f-sans);
  font-size: .9rem;
  transition: border-color .2s, box-shadow .2s;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(59,110,54,.12);
}

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

.form-honeypot { display: none !important; }

.form-message {
  padding: 1rem 1.25rem;
  border-radius: var(--r-md);
  font-size: .9rem;
  margin-bottom: 1.2rem;
}

.form-message.success {
  background: var(--c-primary-xlt);
  border: 1px solid var(--c-primary-light);
  color: var(--c-primary-dark);
}

.form-message.error {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #991b1b;
}

/* ── Static pages (mentions légales, privacy) ─────────────────────── */
.static-content {
  max-width: 760px;
  padding: 3rem 0 4rem;
}

.static-content h1 { margin-bottom: .5rem; }
.static-content .update-date {
  font-size: .8rem;
  color: var(--c-text-light);
  margin-bottom: 2.5rem;
  display: block;
}
.static-content h2 {
  font-size: 1.25rem;
  margin: 2.2rem 0 .6rem;
  color: var(--c-primary-dark);
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--c-border);
}
.static-content p, .static-content li { font-size: .925rem; color: var(--c-text-mid); }
.static-content ul { list-style: disc; padding-left: 1.4rem; margin-bottom: 1em; }

/* ── Error page ─────────────────────────────────────────────────────── */
.error-page {
  min-height: calc(100vh - var(--nav-h) - 4rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem var(--gap);
  margin-top: var(--nav-h);
}

.error-code {
  font-family: var(--f-serif);
  font-size: 7rem;
  font-weight: 700;
  color: var(--c-primary-xlt);
  line-height: 1;
  margin-bottom: -.5rem;
}

.error-page h1 { margin-bottom: .75rem; font-size: 1.8rem; }
.error-page p  { color: var(--c-text-mid); max-width: 420px; margin-bottom: 2rem; }

/* ── Author page ────────────────────────────────────────────────────── */
.author-hero {
  background: linear-gradient(135deg, var(--c-primary-dark), #1e4a1a);
  padding: 4rem 0;
  margin-top: var(--nav-h);
  color: #fff;
}

.author-hero-inner {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 2.5rem;
  align-items: center;
}

.author-hero-img {
  width: 160px; height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid rgba(255,255,255,.2);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
}

.author-hero-info h1 { color: #fff; font-size: 2rem; margin-bottom: .3rem; }
.author-hero-info .role { color: var(--c-accent); font-size: .9rem; text-transform: uppercase; letter-spacing: .06em; font-weight: 500; margin-bottom: .8rem; }
.author-hero-info p { color: rgba(255,255,255,.78); font-size: .95rem; max-width: 520px; }

.credentials {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.cred-badge {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--r-pill);
  padding: .3rem .9rem;
  font-size: .78rem;
  color: rgba(255,255,255,.88);
}

/* ── Carbon Simulator — Premium UI ─────────────────────────────────── */
@property --sim-glow {
  syntax: '<angle>';
  inherits: false;
  initial-value: 135deg;
}

.carbon-page {
  margin-top: var(--nav-h);
  background:
    radial-gradient(circle at 12% 10%, rgba(228,184,64,.18), transparent 34rem),
    radial-gradient(circle at 88% 14%, rgba(90,154,82,.16), transparent 28rem),
    var(--c-bg);
}

.carbon-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3.4rem, 7vw, 5.8rem) 0 clamp(3rem, 6vw, 5rem);
  text-align: center;
  color: #fff;
  isolation: isolate;
  background:
    radial-gradient(circle at 18% 20%, rgba(228,184,64,.22), transparent 18rem),
    radial-gradient(circle at 82% 18%, rgba(255,255,255,.12), transparent 22rem),
    linear-gradient(135deg, var(--c-primary-dark) 0%, #193d18 55%, #102715 100%);
}

.carbon-hero::before,
.carbon-hero::after {
  content: '';
  position: absolute;
  z-index: -1;
  border-radius: 999px;
  pointer-events: none;
  filter: blur(2px);
  opacity: .45;
}

.carbon-hero::before {
  width: 360px;
  height: 360px;
  left: -120px;
  bottom: -180px;
  background: rgba(228,184,64,.22);
  animation: simFloat 12s ease-in-out infinite;
}

.carbon-hero::after {
  width: 260px;
  height: 260px;
  right: -80px;
  top: -90px;
  background: rgba(90,154,82,.34);
  animation: simFloat 14s ease-in-out infinite reverse;
}

.carbon-hero-inner {
  position: relative;
  max-width: 860px;
}

.carbon-hero .tag {
  margin-bottom: 1rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.14);
}

.carbon-hero h1 {
  color: #fff;
  font-size: clamp(2rem, 5vw, 3.65rem);
  line-height: 1.08;
  margin: 0 auto .9rem;
  max-width: 840px;
  text-wrap: balance;
  text-shadow: 0 18px 50px rgba(0,0,0,.22);
}

.carbon-hero p {
  color: rgba(255,255,255,.82);
  max-width: 640px;
  margin: 0 auto;
  font-size: clamp(.98rem, 1.8vw, 1.08rem);
}

.carbon-hero-stats {
  display: flex;
  justify-content: center;
  gap: .7rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.carbon-hero-stat {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem .8rem;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--r-pill);
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: rgba(255,255,255,.86);
  font-size: .8rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12);
}

.carbon-simulator-container {
  padding: clamp(2rem, 4vw, 3.25rem) 0 4.5rem;
}

.simulator-wrap {
  position: relative;
  overflow: hidden;
  margin-top: 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.88)),
    var(--c-bg-card);
  border: 1px solid rgba(216,232,210,.9);
  border-radius: clamp(22px, 3vw, 34px);
  box-shadow:
    0 28px 80px rgba(28,42,29,.12),
    0 10px 30px rgba(58,110,54,.10),
    inset 0 1px 0 rgba(255,255,255,.9);
}

.simulator-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(255,255,255,.4), transparent 34%, rgba(228,184,64,.08) 70%, transparent);
  opacity: .75;
}

.simulator-tabs {
  position: relative;
  z-index: 1;
  display: flex;
  gap: .55rem;
  padding: .8rem;
  overflow-x: auto;
  background:
    linear-gradient(180deg, rgba(246,243,237,.92), rgba(246,243,237,.68));
  border-bottom: 1px solid rgba(216,232,210,.9);
  scrollbar-width: thin;
  scrollbar-color: rgba(59,110,54,.35) transparent;
}

.simulator-tabs::-webkit-scrollbar { height: 6px; }
.simulator-tabs::-webkit-scrollbar-thumb {
  background: rgba(59,110,54,.35);
  border-radius: var(--r-pill);
}

.sim-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 44px;
  padding: .72rem 1.1rem;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  color: var(--c-text-mid);
  background: rgba(255,255,255,.48);
  font-size: .86rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition:
    transform .22s ease,
    color .22s ease,
    background .22s ease,
    border-color .22s ease,
    box-shadow .22s ease;
}

.sim-tab:hover {
  transform: translateY(-1px);
  color: var(--c-primary-dark);
  background: rgba(255,255,255,.78);
  border-color: rgba(216,232,210,.9);
}

.sim-tab:focus-visible {
  outline: 3px solid rgba(228,184,64,.38);
  outline-offset: 2px;
}

.sim-tab.active {
  color: #fff;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  border-color: rgba(255,255,255,.18);
  box-shadow: 0 12px 26px rgba(42,80,38,.24);
}

.sim-tab-icon {
  display: inline-grid;
  place-items: center;
  width: 1.45rem;
  height: 1.45rem;
  border-radius: 50%;
  background: rgba(255,255,255,.7);
  font-size: .9rem;
}

.sim-tab.active .sim-tab-icon {
  background: rgba(255,255,255,.16);
}

.simulator-body {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 390px);
  gap: 0;
}

.simulator-inputs {
  padding: clamp(1.35rem, 3vw, 2.35rem);
  border-right: 1px solid rgba(216,232,210,.9);
}

.sim-panel {
  display: none;
  animation: simPanelIn .34s ease both;
}

.sim-panel.active { display: block; }
.sim-panel[hidden] { display: none !important; }

.sim-group {
  position: relative;
  padding: 1.05rem 1.1rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid rgba(216,232,210,.78);
  border-radius: var(--r-lg);
  background:
    linear-gradient(180deg, rgba(255,255,255,.9), rgba(255,255,255,.72));
  box-shadow: 0 10px 28px rgba(58,110,54,.06);
  transition:
    transform .22s ease,
    border-color .22s ease,
    box-shadow .22s ease,
    background .22s ease;
}

.sim-group:hover {
  transform: translateY(-2px);
  border-color: rgba(90,154,82,.38);
  box-shadow: 0 16px 36px rgba(58,110,54,.11);
  background: #fff;
}

.sim-group label {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  font-size: .9rem;
  font-weight: 650;
  margin-bottom: .75rem;
  color: var(--c-text);
  line-height: 1.35;
}

.sim-group label > span {
  display: inline-flex;
  align-items: baseline;
  gap: .25rem;
  padding: .22rem .55rem;
  border-radius: var(--r-pill);
  background: var(--c-primary-xlt);
  white-space: nowrap;
}

.sim-group label .unit {
  font-size: .72rem;
  color: var(--c-text-light);
  font-weight: 500;
}

.sim-group label .val {
  min-width: 2.4rem;
  color: var(--c-primary-dark);
  font-size: .92rem;
  font-weight: 800;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.sim-group input[type="range"] {
  --range-progress: 0%;
  width: 100%;
  height: 9px;
  border: 0;
  border-radius: var(--r-pill);
  background:
    linear-gradient(90deg, var(--c-primary) 0 var(--range-progress), rgba(216,232,210,.95) var(--range-progress) 100%);
  box-shadow: inset 0 1px 3px rgba(28,42,29,.12);
  cursor: pointer;
  accent-color: var(--c-primary);
  appearance: none;
  -webkit-appearance: none;
}

.sim-group input[type="range"]:focus-visible {
  outline: 3px solid rgba(228,184,64,.34);
  outline-offset: 4px;
}

.sim-group input[type="range"]::-webkit-slider-thumb {
  width: 22px;
  height: 22px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary-light), var(--c-primary-dark));
  box-shadow: 0 8px 18px rgba(42,80,38,.28);
  appearance: none;
  -webkit-appearance: none;
  transition: transform .18s ease, box-shadow .18s ease;
}

.sim-group input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.08);
  box-shadow: 0 10px 22px rgba(42,80,38,.34);
}

.sim-group input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary-light), var(--c-primary-dark));
  box-shadow: 0 8px 18px rgba(42,80,38,.28);
}

.sim-hint {
  margin-top: .55rem;
  color: var(--c-text-light);
  font-size: .76rem;
  line-height: 1.5;
}

.simulator-results {
  --ring-color: var(--c-primary);
  position: relative;
  padding: clamp(1.35rem, 3vw, 2.2rem);
  background:
    radial-gradient(circle at 50% 0%, rgba(228,184,64,.18), transparent 15rem),
    linear-gradient(180deg, rgba(237,247,234,.86), rgba(246,243,237,.96));
}

.simulator-results::before {
  content: '';
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(255,255,255,.75);
  border-radius: 24px;
  pointer-events: none;
}

.sim-results-top,
.sim-score-ring,
.sim-metrics,
.sim-comparison,
.sim-tips {
  position: relative;
  z-index: 1;
}

.sim-results-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .8rem;
  margin-bottom: 1.25rem;
}

.sim-result-title {
  margin: 0;
  color: var(--c-text-light);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.sim-live-badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .28rem .58rem;
  border-radius: var(--r-pill);
  color: var(--c-primary-dark);
  background: rgba(255,255,255,.7);
  border: 1px solid rgba(216,232,210,.85);
  font-size: .72rem;
  font-weight: 700;
}

.sim-live-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-primary-light);
  box-shadow: 0 0 0 4px rgba(90,154,82,.16);
}

.sim-score-ring {
  text-align: center;
  margin-bottom: 1.35rem;
}

.sim-ring-wrap {
  position: relative;
  width: 168px;
  height: 168px;
  margin: 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle, #fff 0 54%, rgba(255,255,255,.56) 55% 100%);
  box-shadow:
    0 20px 46px rgba(58,110,54,.14),
    inset 0 1px 0 rgba(255,255,255,.9);
}

.sim-ring-svg {
  width: 148px;
  height: 148px;
  transform: rotate(-90deg);
  filter: drop-shadow(0 8px 12px rgba(58,110,54,.12));
}

.sim-ring-bg {
  fill: none;
  stroke: rgba(216,232,210,.95);
  stroke-width: 8;
}

.sim-ring-fill {
  fill: none;
  stroke: var(--ring-color);
  stroke-width: 8;
  stroke-linecap: round;
  transition:
    stroke-dashoffset .75s cubic-bezier(.22,1,.36,1),
    stroke .35s ease;
}

.sim-ring-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.sim-ring-text strong {
  color: var(--c-primary-dark);
  font-family: var(--f-serif);
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}

.sim-ring-text span {
  color: var(--c-text-light);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .07em;
  line-height: 1.25;
  text-transform: uppercase;
}

.sim-ring-label {
  margin: .85rem 0 0;
  color: var(--c-text-mid);
  font-size: .86rem;
  font-weight: 700;
}

.sim-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
}

.sim-metric {
  min-height: 82px;
  padding: .9rem;
  border: 1px solid rgba(216,232,210,.9);
  border-radius: var(--r-lg);
  background: rgba(255,255,255,.72);
  box-shadow: 0 10px 24px rgba(58,110,54,.07);
  transition: transform .22s ease, box-shadow .22s ease;
}

.sim-metric:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(58,110,54,.11);
}

.sim-metric-label {
  margin-bottom: .25rem;
  color: var(--c-text-light);
  font-size: .72rem;
  font-weight: 700;
}

.sim-metric-value {
  color: var(--c-text);
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}

.sim-metric-value .unit {
  margin-left: .2rem;
  color: var(--c-text-light);
  font-size: .72rem;
  font-weight: 600;
}

.sim-comparison {
  margin-top: 1.15rem;
  padding: 1rem;
  border: 1px solid rgba(216,232,210,.9);
  border-radius: var(--r-lg);
  background: rgba(255,255,255,.55);
}

.sim-comparison-title {
  margin: 0 0 .75rem;
  color: var(--c-text-light);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.sim-bar-wrap { margin-top: .78rem; }

.sim-bar-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: .35rem;
  color: var(--c-text-mid);
  font-size: .76rem;
  font-weight: 650;
}

.sim-bar-name {
  display: inline-flex;
  align-items: center;
  gap: .38rem;
}

.sim-dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--c-primary);
}

.sim-dot-you { background: var(--c-primary); }
.sim-dot-avg { background: var(--c-secondary); }
.sim-dot-goal { background: var(--c-accent); }

.sim-bar-track {
  height: 10px;
  overflow: hidden;
  border-radius: var(--r-pill);
  background: rgba(216,232,210,.95);
  box-shadow: inset 0 1px 3px rgba(28,42,29,.10);
}

.sim-bar-fill {
  height: 100%;
  border-radius: inherit;
  transition: width .75s cubic-bezier(.22,1,.36,1);
}

.sim-bar-you {
  background: linear-gradient(90deg, var(--c-primary-light), var(--c-primary-dark));
}

.sim-bar-avg {
  background: linear-gradient(90deg, #df875f, var(--c-secondary));
}

.sim-bar-goal {
  background: linear-gradient(90deg, #f0cf69, var(--c-accent));
}

.sim-tips {
  margin-top: 1.15rem;
  padding: 1rem;
  border: 1px solid rgba(90,154,82,.28);
  border-radius: var(--r-lg);
  background:
    linear-gradient(180deg, rgba(237,247,234,.95), rgba(255,255,255,.72));
  box-shadow: 0 12px 30px rgba(58,110,54,.08);
}

.sim-tips[hidden] { display: none !important; }

.sim-tips-title {
  margin: 0 0 .7rem;
  color: var(--c-primary-dark);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.sim-tips ul {
  display: grid;
  gap: .55rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.sim-tips li {
  display: grid;
  grid-template-columns: 1.55rem 1fr;
  gap: .55rem;
  align-items: flex-start;
  color: var(--c-text-mid);
  font-size: .82rem;
  line-height: 1.45;
}

.sim-tip-icon {
  display: grid;
  place-items: center;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 4px 12px rgba(58,110,54,.08);
}

.sim-methodology {
  position: relative;
  overflow: hidden;
  margin-top: 2rem;
  padding: 1.45rem 1.65rem;
  border: 1px solid rgba(216,232,210,.9);
  border-radius: var(--r-lg);
  background:
    linear-gradient(135deg, rgba(255,255,255,.92), rgba(237,247,234,.78));
  box-shadow: 0 14px 38px rgba(58,110,54,.08);
}

.sim-methodology::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
}

.sim-methodology h3 {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .55rem;
  color: var(--c-primary-dark);
  font-size: 1rem;
}

.sim-methodology p {
  margin: 0;
  color: var(--c-text-mid);
  font-size: .86rem;
}

.sim-methodology strong { color: var(--c-primary); }

.carbon-related {
  margin-top: 3rem;
}

.carbon-related h2 {
  margin-bottom: 1.25rem;
  font-size: 1.45rem;
}

.carbon-guide-card {
  position: relative;
  display: block;
  overflow: hidden;
  min-height: 188px;
  padding: 1.45rem;
  border: 1px solid rgba(216,232,210,.9);
  border-radius: var(--r-lg);
  background:
    linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.78));
  box-shadow: 0 12px 28px rgba(58,110,54,.08);
  text-decoration: none;
  transition:
    transform .25s ease,
    box-shadow .25s ease,
    border-color .25s ease;
}

.carbon-guide-card::before {
  content: '';
  position: absolute;
  inset: auto -40px -70px auto;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: rgba(237,247,234,.9);
  transition: transform .3s ease;
}

.carbon-guide-card:hover {
  transform: translateY(-5px);
  border-color: rgba(90,154,82,.5);
  box-shadow: 0 20px 46px rgba(58,110,54,.14);
}

.carbon-guide-card:hover::before {
  transform: scale(1.25);
}

.carbon-guide-card .guide-ico {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: .85rem;
  border-radius: 16px;
  background: var(--c-primary-xlt);
  font-size: 1.45rem;
}

.carbon-guide-card h3,
.carbon-guide-card p {
  position: relative;
  z-index: 1;
}

.carbon-guide-card h3 {
  margin-bottom: .4rem;
  font-size: 1.02rem;
}

.carbon-guide-card p {
  margin: 0;
  color: var(--c-text-mid);
  font-size: .84rem;
  line-height: 1.55;
}

@keyframes simFloat {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(22px, -18px, 0) scale(1.05); }
}

@keyframes simPanelIn {
  from {
    opacity: 0;
    transform: translateY(8px);
    filter: blur(3px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@media (max-width: 1024px) {
  .simulator-body { grid-template-columns: 1fr; }
  .simulator-inputs {
    border-right: 0;
    border-bottom: 1px solid rgba(216,232,210,.9);
  }
  .simulator-results { position: static; }
}

@media (max-width: 768px) {
  .carbon-hero { padding-top: 3rem; }
  .carbon-hero-stats { justify-content: flex-start; }
  .carbon-hero-inner { text-align: left; }
  .carbon-hero h1,
  .carbon-hero p { margin-inline: 0; }
  .simulator-tabs { padding: .65rem; }
  .sim-tab { min-height: 40px; padding: .6rem .9rem; }
  .simulator-inputs,
  .simulator-results { padding: 1rem; }
  .sim-group { padding: .95rem; }
  .sim-metrics { grid-template-columns: 1fr; }
  .sim-ring-wrap {
    width: 148px;
    height: 148px;
  }
  .sim-ring-svg {
    width: 130px;
    height: 130px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .carbon-hero::before,
  .carbon-hero::after,
  .sim-panel {
    animation: none !important;
  }

  .sim-tab,
  .sim-group,
  .sim-metric,
  .sim-bar-fill,
  .sim-ring-fill,
  .carbon-guide-card {
    transition: none !important;
  }
}

/* ── Footer ─────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--c-bg-footer);
  color: rgba(255,255,255,.7);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo {
  font-family: var(--f-serif);
  font-size: 1.25rem;
  color: #fff;
  font-weight: 700;
  margin-bottom: .6rem;
}

.footer-brand p {
  font-size: .85rem;
  line-height: 1.65;
  max-width: 280px;
  margin-bottom: 1.25rem;
}

.footer-col h4 {
  color: #fff;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-family: var(--f-sans);
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  padding: .2rem 0;
  transition: color .2s;
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: .8rem;
  color: rgba(255,255,255,.4);
}

.footer-bottom a {
  color: rgba(255,255,255,.4);
  transition: color .2s;
}

.footer-bottom a:hover { color: rgba(255,255,255,.8); }

/* ── Utilities ──────────────────────────────────────────────────────── */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.text-center { text-align: center; }
.mt-1 { margin-top: .75rem; }
.mt-2 { margin-top: 1.5rem; }
.mt-3 { margin-top: 2.5rem; }
.mb-0 { margin-bottom: 0 !important; }

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .layout-sidebar { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .toc     { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .simulator-body { grid-template-columns: 1fr; }
  .simulator-inputs { border-right: none; border-bottom: 1px solid var(--c-border); }
}

@media (max-width: 768px) {
  :root { --gap: 1rem; }

  .nav-links { display: none; }
  .nav-cta   { display: none; }
  .nav-burger { display: flex; }

  .hero { max-height: 640px; }
  .hero-title { font-size: 1.6rem; }
  .hero-desc  { display: none; }

  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .intro-grid { grid-template-columns: 1fr; }
  .intro-visual { aspect-ratio: 16/9; }
  .intro-stats { grid-template-columns: repeat(3, 1fr); }

  .tool-banner {
    grid-template-columns: 1fr;
    padding: 1.75rem;
  }

  .expert-teaser { flex-direction: column; text-align: center; }

  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-brand p { max-width: 100%; }

  .author-hero-inner { grid-template-columns: 1fr; text-align: center; }
  .author-hero-img { margin: 0 auto; }
  .credentials { justify-content: center; }

  .author-block { grid-template-columns: 1fr; text-align: center; }
  .author-block img { margin: 0 auto; }

  .page-header-meta { flex-direction: column; align-items: flex-start; gap: .4rem; }

  .hero-arrow { display: none; }

  .featured-img { aspect-ratio: 16/9; border-radius: var(--r-lg); }

  .section { padding-block: 2.5rem; }

  .error-code { font-size: 5rem; }
}

@media (max-width: 480px) {
  .intro-stats { grid-template-columns: 1fr; }
  .sim-tab { font-size: .8rem; padding: .5rem .9rem; }
}


.home-practical-choices {
  background: #f8faf7;
}

.home-practical-choices-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem;
  margin-top: 2.5rem;
}

.home-practical-choice-card {
  position: relative;
  overflow: hidden;
  padding: 2rem;
  background: #ffffff;
  border: 1px solid rgba(46, 79, 47, 0.12);
  border-radius: var(--radius-xl, 24px);
  box-shadow: 0 18px 45px rgba(31, 41, 55, 0.08);
}

.home-practical-choice-card::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 170px;
  height: 170px;
  border-radius: 999px;
  background: rgba(46, 125, 50, 0.08);
  pointer-events: none;
}

.home-practical-choice-kicker {
  display: inline-flex;
  position: relative;
  margin-bottom: 0.9rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(46, 125, 50, 0.1);
  color: var(--color-primary, #2e7d32);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.home-practical-choice-card h3 {
  position: relative;
  margin: 0 0 1rem;
  color: var(--color-dark, #1f2937);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  line-height: 1.25;
}

.home-practical-choice-card p {
  position: relative;
  margin: 0 0 1rem;
  color: #4b5563;
  font-size: 1rem;
  line-height: 1.75;
}

.home-practical-choice-card p:last-child {
  margin-bottom: 0;
}

.home-practical-choice-card a {
  color: var(--color-primary, #2e7d32);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 125, 50, 0.35);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.home-practical-choice-card a:hover,
.home-practical-choice-card a:focus {
  color: var(--color-secondary, #1b5e20);
  border-bottom-color: currentColor;
}

@media (max-width: 900px) {
  .home-practical-choices-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .home-practical-choices-grid {
    margin-top: 2rem;
    gap: 1.25rem;
  }

  .home-practical-choice-card {
    padding: 1.4rem;
  }
}