/* ============================================
   IMMO GENIUS - Styles CSS
   SaaS IA pour agents immobiliers
   ============================================ */

/* Variables CSS - Palette de couleurs et typographies */
:root {
  --primary: #1A3A52;        /* Bleu nuit */
  --secondary: #22C55E;      /* Vert */
  --accent: #D4AF37;         /* Or */
  --light-bg: #F8FAFC;       /* Gris très clair */
  --border: #E2E8F0;         /* Gris bordure */
  --text-dark: #1E293B;      /* Texte foncé */
  --text-light: #64748B;     /* Texte gris */
  --white: #FFFFFF;
  --radius: 8px;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* Reset et base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

/* Conteneur global */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */

header {
  background-color: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo:hover {
  color: var(--secondary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-dark);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--secondary);
}

.nav-links .btn-login {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: 8px 20px;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}

.nav-links .btn-login:hover {
  background-color: var(--primary);
  color: var(--white);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--primary);
}

/* Mobile menu toggle */
@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--white);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-links.active {
    max-height: 400px;
  }

  .nav-toggle {
    display: block;
  }

  nav {
    position: relative;
  }
}

/* ============================================
   BOUTONS (CTA)
   ============================================ */

.btn {
  display: inline-block;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  text-align: center;
}

.btn-primary {
  background-color: var(--secondary);
  color: var(--white);
}

.btn-primary:hover {
  background-color: #16a34a;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(34, 197, 94, 0.3);
}

.btn-secondary {
  background-color: var(--primary);
  color: var(--white);
}

.btn-secondary:hover {
  background-color: #0f2a3b;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(26, 58, 82, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background-color: var(--primary);
  color: var(--white);
}

/* ============================================
   SECTIONS
   ============================================ */

section {
  padding: 80px 0;
}

section.light-bg {
  background-color: var(--light-bg);
}

section h2 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary);
}

section .subtitle {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 48px;
  max-width: 600px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  padding: 120px 0;
  background: linear-gradient(135deg, var(--primary) 0%, #0f2a3b 100%);
  color: var(--white);
  text-align: center;
}

.hero h1 {
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.2;
}

.hero p {
  font-size: 20px;
  margin-bottom: 40px;
  color: #e0e7ff;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero .btn {
  font-size: 18px;
  padding: 16px 40px;
}

@media (max-width: 768px) {
  .hero {
    padding: 80px 0;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero p {
    font-size: 16px;
  }
}

/* ============================================
   GRILLES / CARDS
   ============================================ */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.3s ease;
}

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

.card-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 22px;
  margin-bottom: 12px;
  color: var(--primary);
}

.card p {
  color: var(--text-light);
  font-size: 16px;
  line-height: 1.6;
}

/* ============================================
   FEATURES SECTIONS
   ============================================ */

.feature-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 80px;
}

.feature-item:nth-child(even) {
  grid-template-columns: 1fr 1fr;
  direction: rtl;
}

.feature-item:nth-child(even) > * {
  direction: ltr;
}

.feature-content h3 {
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 16px;
}

.feature-content p {
  color: var(--text-light);
  font-size: 16px;
  margin-bottom: 24px;
  line-height: 1.8;
}

.feature-image {
  background-color: var(--light-bg);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  font-size: 80px;
}

@media (max-width: 768px) {
  .feature-item {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-item:nth-child(even) {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .feature-image {
    padding: 32px;
  }
}

/* ============================================
   PRICING CARDS
   ============================================ */

.pricing-card {
  background-color: var(--white);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--secondary);
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.15);
  transform: scale(1.05);
}

.pricing-card:hover {
  box-shadow: var(--shadow);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--secondary);
  color: var(--white);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.pricing-card h3 {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 16px;
}

.pricing-card .price {
  font-size: 48px;
  font-weight: 700;
  color: var(--secondary);
  margin: 24px 0;
}

.pricing-card .price span {
  font-size: 18px;
  color: var(--text-light);
}

.pricing-card .description {
  color: var(--text-light);
  margin-bottom: 32px;
  font-size: 14px;
}

.pricing-features {
  list-style: none;
  margin: 32px 0;
  text-align: left;
}

.pricing-features li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-light);
  font-size: 14px;
}

.pricing-features li:before {
  content: "✓ ";
  color: var(--secondary);
  font-weight: 700;
  margin-right: 8px;
}

/* ============================================
   TOGGLE (MENSUEL / ANNUEL)
   ============================================ */

.toggle-container {
  text-align: center;
  margin-bottom: 48px;
}

.toggle-switch {
  display: inline-flex;
  background-color: var(--light-bg);
  border-radius: 25px;
  padding: 4px;
  gap: 8px;
}

.toggle-btn {
  padding: 8px 24px;
  border: none;
  background-color: transparent;
  color: var(--text-light);
  font-weight: 600;
  cursor: pointer;
  border-radius: 20px;
  transition: all 0.3s ease;
}

.toggle-btn.active {
  background-color: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow);
}

/* ============================================
   FAQ / ACCORDION
   ============================================ */

.accordion {
  margin-top: 48px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
}

.accordion-header {
  background-color: var(--light-bg);
  padding: 20px;
  cursor: pointer;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s ease;
  user-select: none;
}

.accordion-header:hover {
  background-color: #f1f5f9;
}

.accordion-icon {
  font-size: 20px;
  transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 20px;
}

.accordion-item.active .accordion-content {
  max-height: 300px;
  padding: 20px;
}

.accordion-content p {
  color: var(--text-light);
  line-height: 1.8;
}

/* ============================================
   FORMULAIRES
   ============================================ */

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  background-color: #dcfce7;
  border: 1px solid #bbf7d0;
  color: #166534;
  padding: 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  display: none;
}

.form-success.show {
  display: block;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--primary);
  color: var(--white);
  padding: 60px 0 20px;
}

footer .grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
  margin-bottom: 40px;
}

footer h4 {
  font-size: 18px;
  margin-bottom: 16px;
}

footer a {
  color: #cbd5e1;
  text-decoration: none;
  display: block;
  margin-bottom: 12px;
  transition: color 0.3s ease;
}

footer a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid #2d5a7b;
  padding-top: 20px;
  text-align: center;
  color: #cbd5e1;
  font-size: 14px;
}

/* ============================================
   RESPONSIVE / MOBILE
   ============================================ */

@media (max-width: 768px) {
  section {
    padding: 60px 0;
  }

  section h2 {
    font-size: 28px;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .nav-links {
    gap: 16px;
  }

  footer .grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   UTILITAIRES
   ============================================ */

.text-center {
  text-align: center;
}

.text-light {
  color: var(--text-light);
}

.mt-2 {
  margin-top: 16px;
}

.mt-4 {
  margin-top: 32px;
}

.mb-2 {
  margin-bottom: 16px;
}

.mb-4 {
  margin-bottom: 32px;
}