/* ============================================================
   MÉTHODOLOGIE — Digital Cleanup Day
   ============================================================ */

:root {
  --pink:      #9d174d;
  --pink-m:    #ec4899;
  --pink-l:    #fdf2f8;
  --purple:    #6b21a8;
  --purple-m:  #a855f7;
  --purple-l:  #faf5ff;
  --green:     #065f46;
  --green-m:   #10b981;
  --green-l:   #ecfdf5;
  --coral:     #9f1239;
  --coral-m:   #fb7185;
  --gray-100:  #f9f7f8;
  --gray-200:  #f3eef1;
  --gray-300:  #e8dde4;
  --gray-500:  #a87d96;
  --gray-600:  #7d5570;
  --gray-700:  #4a2d40;
  --gray-800:  #2d1a26;
  --shadow:    0 4px 12px rgba(157,23,77,0.10);
  --radius:    12px;
  --transition: all 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: linear-gradient(160deg, #fdf2f8 0%, #faf5ff 50%, #fff1f2 100%);
  background-attachment: fixed;
  color: var(--gray-800);
  min-height: 100vh;
  line-height: 1.7;
}

/* ===== HEADER ===== */
header {
  background: linear-gradient(135deg, #831843 0%, #9d174d 40%, #ec4899 100%);
  color: white;
  padding: 0;
  box-shadow: 0 4px 20px rgba(157,23,77,0.3);
}

.header-content { padding: 24px 24px 20px; }

.header-title-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.header-title-logo {
  height: 56px;
  width: auto;
  filter: brightness(0) invert(1);
  flex-shrink: 0;
}

.header-title-text { text-align: left; }

.header-title-text h1 {
  font-size: 1.7rem;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.header-title-text p { font-size: 0.9rem; opacity: 0.85; margin-top: 3px; }

/* ===== NAVIGATION ===== */
.page-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 20px;
  background: white;
  border-bottom: 2px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(157,23,77,0.08);
}

.page-nav a {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--gray-700);
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
  transition: var(--transition);
}

.page-nav a:hover {
  background: var(--pink-l);
  border-color: var(--pink-m);
  color: var(--pink);
}

.page-nav .btn-nav {
  background: linear-gradient(135deg, #831843, #ec4899);
  color: white;
  border-color: transparent;
  margin-left: 8px;
}

.page-nav .btn-nav:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(157,23,77,0.3);
  color: white;
}

/* ===== MAIN ===== */
main {
  max-width: 960px;
  margin: 32px auto;
  padding: 0 16px 80px;
}

/* ===== TITRES DE SECTION ===== */
.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 40px 0 20px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--pink-m);
}

.section-icon { font-size: 1.6rem; }

.section-title h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-800);
}

.section-intro {
  background: white;
  border-left: 4px solid var(--pink-m);
  padding: 14px 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 24px;
  font-size: 0.92rem;
  color: var(--gray-700);
  box-shadow: var(--shadow);
}

/* ===== INTRO SECTION ===== */
.intro-section { margin-bottom: 8px; }

.intro-card {
  display: flex;
  gap: 24px;
  background: white;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  align-items: flex-start;
}

.intro-icon { font-size: 3rem; flex-shrink: 0; }

.intro-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--pink);
  margin-bottom: 12px;
}

.intro-content p {
  font-size: 0.92rem;
  color: var(--gray-700);
  margin-bottom: 10px;
}

/* ===== CALC CARDS ===== */
.calc-card {
  background: white;
  border-radius: var(--radius);
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}

.calc-card:hover {
  box-shadow: 0 8px 24px rgba(157,23,77,0.15);
  transform: translateY(-1px);
}

.calc-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  color: white;
}

.calc-header.green       { background: linear-gradient(135deg, #065f46, #10b981); }
.calc-header.green-light { background: linear-gradient(135deg, #047857, #34d399); }
.calc-header.purple      { background: linear-gradient(135deg, #6b21a8, #a855f7); }
.calc-header.purple-light{ background: linear-gradient(135deg, #7e22ce, #c084fc); }
.calc-header.gray        { background: linear-gradient(135deg, #374151, #6b7280); }
.calc-header.coral       { background: linear-gradient(135deg, #9f1239, #fb7185); }

.calc-icon { font-size: 1.8rem; flex-shrink: 0; }

.calc-title {
  font-size: 1rem;
  font-weight: 700;
}

.calc-subtitle {
  font-size: 0.78rem;
  opacity: 0.85;
  margin-top: 2px;
}

.calc-factor {
  margin-left: auto;
  background: rgba(255,255,255,0.25);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 800;
  white-space: nowrap;
  flex-shrink: 0;
}

.calc-body {
  padding: 20px;
}

.calc-formula-row {
  margin-bottom: 16px;
}

.calc-explanation h4 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.calc-explanation p {
  font-size: 0.88rem;
  color: var(--gray-600);
  margin-bottom: 10px;
}

.calc-explanation ul {
  list-style: none;
  padding: 0;
  margin-bottom: 12px;
}

.calc-explanation ul li {
  font-size: 0.85rem;
  color: var(--gray-600);
  padding: 4px 0;
}

/* ===== FORMULES ===== */
.formula-box {
  background: var(--gray-100);
  border: 2px solid var(--gray-300);
  border-radius: 8px;
  padding: 14px 18px;
  margin: 12px 0;
}

.formula-box.main-formula {
  background: linear-gradient(135deg, #fdf2f8, #faf5ff);
  border-color: var(--pink-m);
}

.formula-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.formula {
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--pink);
  padding: 4px 0;
}

.formula sub {
  font-size: 0.7rem;
}

/* ===== BOÎTES INFO ===== */
.example-box {
  background: #f0fdf4;
  border: 1px solid #86efac;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: #166534;
  margin-top: 10px;
}

.info-box {
  background: #eff6ff;
  border: 1px solid #93c5fd;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: #1e40af;
  margin-top: 10px;
}

.warning-box {
  display: flex;
  gap: 16px;
  background: #fffbeb;
  border: 2px solid #fbbf24;
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 24px;
}

.warning-icon { font-size: 1.8rem; flex-shrink: 0; }

.warning-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #92400e;
  margin-bottom: 10px;
}

.warning-content ul {
  list-style: disc;
  padding-left: 18px;
}

.warning-content ul li {
  font-size: 0.85rem;
  color: #78350f;
  padding: 3px 0;
}

/* ===== SOURCE TAG ===== */
.source-tag {
  display: inline-block;
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.75rem;
  color: var(--gray-600);
  margin-top: 12px;
}

/* ===== TABLEAUX ===== */
.recap-table-wrapper {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-top: 24px;
  overflow-x: auto;
}

.recap-table-wrapper h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-700);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--gray-200);
}

.recap-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.87rem;
}

.recap-table thead tr {
  background: linear-gradient(135deg, #831843, #9d174d);
  color: white;
}

.recap-table thead th {
  padding: 12px 14px;
  text-align: left;
  font-weight: 600;
}

.recap-table tbody tr {
  border-bottom: 1px solid var(--gray-200);
  transition: background 0.15s;
}

.recap-table tbody tr:hover { background: var(--pink-l); }
.recap-table tbody tr.highlight { background: #fdf2f8; }

.recap-table tbody td {
  padding: 10px 14px;
  color: var(--gray-700);
}

.recap-table td.factor {
  font-weight: 800;
  color: var(--pink);
  font-size: 0.95rem;
}

.recap-table td.formula-cell {
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  color: var(--purple);
}

/* ===== PRINCIPE RÉEMPLOI ===== */
.principle-card {
  display: flex;
  gap: 20px;
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  align-items: flex-start;
}

.principle-icon { font-size: 2.5rem; flex-shrink: 0; }

.principle-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--pink);
  margin-bottom: 10px;
}

.principle-content p {
  font-size: 0.9rem;
  color: var(--gray-700);
  margin-bottom: 12px;
}

.principle-content .note {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-style: italic;
  margin-top: 8px;
}

/* ===== EXEMPLES RÉEMPLOI ===== */
.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.example-card {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--pink-m);
  transition: var(--transition);
}

.example-card:hover { transform: translateY(-2px); }

.example-icon  { font-size: 2rem; margin-bottom: 8px; }
.example-title { font-size: 0.85rem; font-weight: 700; color: var(--gray-700); margin-bottom: 8px; }
.example-calc  { font-family: monospace; font-size: 0.82rem; color: var(--gray-500); }
.example-result{ font-size: 0.95rem; font-weight: 800; color: var(--pink); margin-top: 6px; }

/* ===== RECYCLAGE ===== */
.recyclage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 8px;
}

.recyclage-card {
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow);
}

.recyclage-card.reutilisee { background: #fdf2f8; border: 2px solid #f9a8d4; }
.recyclage-card.recyclee   { background: #ecfdf5; border: 2px solid #6ee7b7; }
.recyclage-card.valorisee  { background: #eff6ff; border: 2px solid #93c5fd; }
.recyclage-card.detruite   { background: var(--gray-100); border: 2px solid var(--gray-300); }

.recyclage-pct {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 6px;
}

.recyclage-card.reutilisee .recyclage-pct { color: var(--pink); }
.recyclage-card.recyclee   .recyclage-pct { color: #059669; }
.recyclage-card.valorisee  .recyclage-pct { color: #2563eb; }
.recyclage-card.detruite   .recyclage-pct { color: var(--gray-600); }

.recyclage-label {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--gray-800);
}

.recyclage-desc {
  font-size: 0.78rem;
  color: var(--gray-600);
  line-height: 1.4;
}

/* ===== EXEMPLE COMPLET ===== */
.example-full-box {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-top: 24px;
}

.example-full-box h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--pink);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--gray-200);
}

.example-steps { display: flex; flex-direction: column; gap: 12px; }

.step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #831843, #ec4899);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.step-content {
  font-size: 0.88rem;
  color: var(--gray-700);
  padding-top: 6px;
}

/* ===== SOURCES ===== */
.sources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.source-card {
  display: flex;
  gap: 14px;
  background: white;
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.source-card:hover { transform: translateY(-2px); }

.source-logo {
  font-size: 2rem;
  flex-shrink: 0;
  width: 48px;
  text-align: center;
}

.source-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 6px;
}

.source-desc {
  font-size: 0.8rem;
  color: var(--gray-600);
  line-height: 1.5;
  margin-bottom: 8px;
}

.source-link {
  font-size: 0.78rem;
  color: var(--pink-m);
  text-decoration: none;
  font-weight: 600;
}

.source-link:hover {
  color: var(--pink);
  text-decoration: underline;
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 24px;
  color: var(--gray-500);
  font-size: 0.82rem;
  border-top: 1px solid var(--gray-300);
  background: white;
}

.footer-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 14px;
}

.footer-logo-img {
  height: 30px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  opacity: 0.45;
  transition: var(--transition);
  filter: grayscale(1);
}

.footer-logo-img:hover { opacity: 0.85; filter: grayscale(0); }

.footer-logo-img.logo-inr {
  border-radius: 6px;
  background: white;
  padding: 3px 7px;
  border: 1px solid var(--gray-300);
}

footer a { color: var(--pink-m); text-decoration: none; }
footer a:hover { color: var(--pink); text-decoration: underline; }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .intro-card      { flex-direction: column; }
  .principle-card  { flex-direction: column; }
  .calc-factor     { display: none; }
  .examples-grid   { grid-template-columns: repeat(2, 1fr); }
  .recyclage-grid  { grid-template-columns: repeat(2, 1fr); }
  .sources-grid    { grid-template-columns: 1fr; }
  .page-nav        { gap: 6px; }
  .page-nav a      { font-size: 0.75rem; padding: 5px 10px; }
  .header-title-text h1 { font-size: 1.2rem; }
}