/* ========================================
   Diagnostic Habitat Conseil — Style
   Colors: Forest Green #2D5A3D, Cream #FFF8F0, Terracotta #C46A47, Dark #1A1A1A
   ======================================== */

:root {
  --green: #2D5A3D;
  --green-dark: #1E3D2A;
  --green-light: #3A7550;
  --cream: #FFF8F0;
  --cream-dark: #F5EDE0;
  --terracotta: #C46A47;
  --terracotta-dark: #A8553A;
  --terracotta-light: #D98B6A;
  --dark: #1A1A1A;
  --gray: #6B6B6B;
  --gray-light: #E8E8E8;
  --white: #FFFFFF;
  --shadow: 0 2px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius: 12px;
  --transition: 0.3s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--dark);
  background: var(--cream);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--green); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--terracotta); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--green-dark);
}
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
p { margin-bottom: 1rem; }

/* Utility */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section--alt { background: var(--white); }
.text-center { text-align: center; }
.text-green { color: var(--green); }
.text-terracotta { color: var(--terracotta); }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Fade-in animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ========== HEADER / NAV ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: var(--shadow);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--green-dark);
}
.nav__logo img { width: 40px; height: 40px; }
.nav__logo span { display: none; }
.nav__links {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--white);
  box-shadow: var(--shadow-lg);
  padding: 20px;
  gap: 0;
}
.nav__links.active { display: flex; }
.nav__links a {
  display: block;
  padding: 12px 20px;
  font-weight: 600;
  color: var(--dark);
  border-radius: 8px;
  transition: background var(--transition), color var(--transition);
}
.nav__links a:hover,
.nav__links a.active {
  background: var(--cream);
  color: var(--green);
}
.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__toggle span {
  width: 26px;
  height: 3px;
  background: var(--green-dark);
  border-radius: 2px;
  transition: var(--transition);
}
.nav__cta {
  display: none;
}

/* Desktop nav */
@media (min-width: 768px) {
  .nav__logo span { display: inline; }
  .nav__links {
    display: flex;
    flex-direction: row;
    position: static;
    box-shadow: none;
    padding: 0;
    gap: 4px;
    background: none;
  }
  .nav__links a { padding: 8px 14px; font-size: 0.95rem; }
  .nav__toggle { display: none; }
  .nav__cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--terracotta);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background var(--transition);
    white-space: nowrap;
  }
  .nav__cta:hover { background: var(--terracotta-dark); color: var(--white); }
}

/* ========== HERO ========== */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(45,90,61,0.88), rgba(30,61,42,0.92)),
    url('https://images.unsplash.com/photo-1560518883-ce09059eeffa?w=1400&q=80') center/cover no-repeat;
  color: var(--white);
  padding: 80px 0;
}
.hero__content { max-width: 700px; }
.hero__badge {
  display: inline-block;
  background: rgba(196,106,71,0.25);
  border: 1px solid rgba(196,106,71,0.5);
  color: var(--terracotta-light);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero h1 { color: var(--white); margin-bottom: 20px; }
.hero p { font-size: 1.1rem; opacity: 0.92; margin-bottom: 30px; max-width: 550px; }
.hero__buttons { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
}
.btn--primary {
  background: var(--terracotta);
  color: var(--white);
  border-color: var(--terracotta);
}
.btn--primary:hover { background: var(--terracotta-dark); border-color: var(--terracotta-dark); color: var(--white); }
.btn--outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}
.btn--outline:hover { background: rgba(255,255,255,0.12); border-color: var(--white); color: var(--white); }
.btn--green {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}
.btn--green:hover { background: var(--green-dark); border-color: var(--green-dark); color: var(--white); }

/* ========== STATS ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: 40px 0;
}
.stat {
  text-align: center;
  padding: 24px 16px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat__number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--terracotta);
  display: block;
}
.stat__label { font-size: 0.9rem; color: var(--gray); margin-top: 4px; }

@media (min-width: 768px) {
  .stats { grid-template-columns: repeat(4, 1fr); }
}

/* ========== CARDS ========== */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 600px) { .cards-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .cards-grid--3 { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 24px;
  transition: transform var(--transition), box-shadow var(--transition);
  border-top: 4px solid var(--green);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card--terracotta { border-top-color: var(--terracotta); }
.card__icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: var(--green);
}
.card__icon--terra { color: var(--terracotta); background: #FFF0E8; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--gray); font-size: 0.95rem; }

/* ========== SECTION HEADING ========== */
.section__heading {
  max-width: 650px;
  margin: 0 auto 40px;
  text-align: center;
}
.section__heading .overline {
  display: inline-block;
  color: var(--terracotta);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 10px;
}
.section__heading p { color: var(--gray); font-size: 1.05rem; }

/* ========== IMAGE SECTION ========== */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}
@media (min-width: 768px) { .split { grid-template-columns: 1fr 1fr; } }
.split__img {
  height: 320px;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow-lg);
}
.split__content h2 { margin-bottom: 16px; }
.split__content p { color: var(--gray); }
.check-list { margin-top: 16px; }
.check-list li {
  padding: 6px 0;
  padding-left: 28px;
  position: relative;
  color: var(--dark);
}
.check-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}

/* ========== FAQ ========== */
.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--green-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
}
.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--terracotta);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-answer__inner {
  padding: 0 24px 20px;
  color: var(--gray);
  line-height: 1.7;
}

/* ========== CTA BANNER ========== */
.cta-banner {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: var(--white);
  text-align: center;
  padding: 60px 20px;
  border-radius: var(--radius);
  margin: 40px 0;
}
.cta-banner h2 { color: var(--white); margin-bottom: 12px; }
.cta-banner p { opacity: 0.9; margin-bottom: 24px; max-width: 500px; margin-left: auto; margin-right: auto; }

/* ========== CONTACT FORM ========== */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  max-width: 700px;
  margin: 0 auto;
}
@media (min-width: 600px) { .form-grid--2 { grid-template-columns: 1fr 1fr; } }
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--green-dark);
  font-size: 0.95rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--gray-light);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background: var(--white);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--green);
}
.form-group textarea { min-height: 140px; resize: vertical; }
.form-group--full { grid-column: 1 / -1; }

/* ========== PAGE HERO (inner pages) ========== */
.page-hero {
  background: linear-gradient(135deg, rgba(45,90,61,0.9), rgba(30,61,42,0.93)),
    url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?w=1400&q=80') center/cover no-repeat;
  color: var(--white);
  padding: 80px 0 50px;
  text-align: center;
}
.page-hero h1 { color: var(--white); margin-bottom: 12px; }
.page-hero p { opacity: 0.9; max-width: 600px; margin: 0 auto; font-size: 1.1rem; }

.page-hero--diag {
  background-image: linear-gradient(135deg, rgba(45,90,61,0.9), rgba(30,61,42,0.93)),
    url('https://images.unsplash.com/photo-1582268611958-ebfd161ef9cf?w=1400&q=80');
}
.page-hero--conseil {
  background-image: linear-gradient(135deg, rgba(45,90,61,0.9), rgba(30,61,42,0.93)),
    url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?w=1400&q=80');
}
.page-hero--contact {
  background-image: linear-gradient(135deg, rgba(45,90,61,0.9), rgba(30,61,42,0.93)),
    url('https://images.unsplash.com/photo-1497366216548-37526070297c?w=1400&q=80');
}

/* ========== DIAGNOSTIC DETAIL CARDS ========== */
.diag-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 24px;
}
@media (min-width: 768px) {
  .diag-card { grid-template-columns: auto 1fr; }
}
.diag-card__icon {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  background: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}
.diag-card h3 { margin-bottom: 8px; }
.diag-card p { color: var(--gray); font-size: 0.95rem; }
.diag-card .tag {
  display: inline-block;
  background: var(--cream);
  color: var(--green);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 8px;
  margin-right: 6px;
}
.diag-card .tag--required { background: #FDEAEA; color: #C0392B; }
.diag-card .tag--recommended { background: #FFF3E0; color: var(--terracotta); }

/* ========== CONSEIL ARTICLE ========== */
.article-content {
  max-width: 800px;
  margin: 0 auto;
}
.article-content h2 {
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--cream-dark);
}
.article-content h3 {
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--terracotta);
}
.article-content ul, .article-content ol {
  margin: 16px 0;
  padding-left: 24px;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 8px; color: var(--dark); }

.tip-box {
  background: linear-gradient(135deg, #EBF5EE, #E0F0E5);
  border-left: 4px solid var(--green);
  padding: 20px 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 24px 0;
}
.tip-box strong { color: var(--green-dark); }

.warning-box {
  background: #FFF3E0;
  border-left: 4px solid var(--terracotta);
  padding: 20px 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 24px 0;
}

/* ========== CONTACT INFO ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}
@media (min-width: 768px) {
  .contact-grid { grid-template-columns: 1fr 1.2fr; }
}
.contact-info-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}
.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}
.contact-info-item:last-child { margin-bottom: 0; }
.contact-info-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.contact-info-item h4 { color: var(--green-dark); margin-bottom: 4px; }
.contact-info-item p { margin: 0; color: var(--gray); font-size: 0.95rem; }

/* ========== FOOTER ========== */
.footer {
  background: var(--green-dark);
  color: rgba(255,255,255,0.8);
  padding: 50px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-bottom: 40px;
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
}
.footer h4 {
  color: var(--white);
  margin-bottom: 16px;
  font-size: 1.05rem;
}
.footer p { font-size: 0.9rem; line-height: 1.6; }
.footer a { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.footer a:hover { color: var(--terracotta-light); }
.footer-links li { margin-bottom: 10px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
}
.footer-bottom a { margin-left: 4px; }

/* ========== 404 ========== */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}
.error-page__code {
  font-size: clamp(5rem, 15vw, 10rem);
  font-weight: 900;
  color: var(--cream-dark);
  line-height: 1;
}
.error-page h2 { margin: 16px 0; }
.error-page p { color: var(--gray); margin-bottom: 30px; max-width: 450px; margin-left: auto; margin-right: auto; }

/* ========== BREADCRUMB ========== */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.88rem;
}
.breadcrumb a { color: var(--gray); }
.breadcrumb span { color: var(--gray); margin: 0 6px; }
.breadcrumb strong { color: var(--green-dark); font-weight: 600; }

/* ========== RESPONSIVE TWEAKS ========== */
@media (max-width: 480px) {
  .hero { min-height: 60vh; padding: 60px 0; }
  .section { padding: 40px 0; }
  .btn { padding: 12px 20px; font-size: 0.9rem; }
  .card { padding: 24px 20px; }
}