/* =============================================
   IMPACT SOCIAL - CSS Principal
   Version allégée pour auto-entrepreneur
   ============================================= */

:root {
  --turquoise: #00B1C2;
  --turquoise-dark: #009AAB;
  --violet: #8B5CF6;
  --dark-blue: #0B2239;
  --gray-600: #475569;
  --gray-400: #94A3B8;
  --gray-200: #E2E8F0;
  --gray-100: #F8FAFC;
  --white: #FFFFFF;
  --warning: #F59E0B;
  --success: #10B981;
  --info: #0284C7;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--dark-blue);
  line-height: 1.6;
  background: var(--white);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* NAVIGATION */
.navbar {
  background: var(--white);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  text-decoration: none;
  color: var(--dark-blue);
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Logo image */
.brand-logo {
  height: 65px;
  width: auto;
  display: block;
}

.brand span {
  font-size: 11px;
  font-weight: 500;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  line-height: 1;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  text-decoration: none;
  color: var(--gray-600);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--turquoise);
  background: var(--gray-100);
}

/* BOUTONS */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--turquoise) 0%, var(--violet) 100%);
  color: var(--white);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 177, 194, 0.3);
}

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

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

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* SECTIONS */
.section {
  padding: 60px 0;
}

.section-gray {
  background: var(--gray-100);
}

/* HERO */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, var(--gray-100) 0%, var(--white) 100%);
}

.hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--dark-blue);
}

.hero .lead {
  font-size: 18px;
  color: var(--gray-600);
  margin-bottom: 32px;
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* TYPOGRAPHIE */
h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--dark-blue);
  margin-bottom: 16px;
}

h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark-blue);
  margin-bottom: 12px;
}

h4 {
  font-size: 17px;
  font-weight: 600;
}

.text-center { text-align: center; }
.text-turquoise { color: var(--turquoise); }

.subtitle {
  font-size: 17px;
  color: var(--gray-600);
  max-width: 700px;
  margin: 0 auto 40px;
}

/* CARDS */
.card {
  background: var(--white);
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.card-accent {
  border-left: 4px solid var(--turquoise);
}

/* GRILLES */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* LISTES */
ul.check-list {
  list-style: none;
  padding: 0;
}

ul.check-list li {
  padding-left: 28px;
  position: relative;
  margin-bottom: 10px;
  color: var(--gray-600);
}

ul.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--turquoise);
  font-weight: bold;
}

/* ALERTES */
.alert {
  padding: 20px 24px;
  border-radius: 12px;
  margin: 24px 0;
}

.alert-info {
  background: #E0F2FE;
  border-left: 4px solid var(--info);
}

.alert-warning {
  background: #FEF3C7;
  border-left: 4px solid var(--warning);
}

/* BADGE */
.badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--gray-100);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: 16px;
}

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

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--turquoise);
}

/* TABLEAU */
table {
  width: 100%;
  border-collapse: collapse;
}

table th {
  background: linear-gradient(135deg, var(--turquoise) 0%, var(--violet) 100%);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-200);
}

table tr:nth-child(even) {
  background: var(--gray-100);
}

/* FOOTER */
.footer {
  background: var(--dark-blue);
  color: var(--white);
  padding: 40px 0;
  text-align: center;
}

.footer a {
  color: var(--white);
  opacity: 0.8;
  text-decoration: none;
}

.footer a:hover {
  opacity: 1;
}

.footer-links {
  margin-top: 16px;
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a.linkedin {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-links a.linkedin img {
  width: 20px;
  height: 20px;
  vertical-align: middle;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px;
    display: none;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
  }
  
  .nav-menu.active { display: flex; }
  
  .menu-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
  }
}

@media (min-width: 769px) {
  .menu-toggle { display: none; }
}