/* Design System: Les Ailes de Sénart - UI/UX PRO MAX Overhaul */
/* Focus: Sportif, Premium, Aérien, Moderne */

:root {
  /* Couleurs issues du Logo */
  --primary: #1D5B96;    /* Bleu Logo Profond */
  --primary-light: #2D78BE;
  --secondary: #FAB514;  /* Or/Jaune Logo Vibrant */
  --secondary-hover: #E5A512;
  
  /* Palette de fond (Adieu look hôpital) */
  --bg-main: #F8FAFC;    /* Gris bleuté très clair */
  --bg-card: #FFFFFF;
  --bg-subtle: #EDF2F7;
  --bg-dark: #0F172A;    /* Slate sombre pour contrastes forts */
  
  /* Texte */
  --text-main: #1E293B;
  --text-muted: #64748B;
  --text-on-primary: #FFFFFF;
  
  /* Bordures & Ombres Elevation */
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  
  /* Shadows (Soft & Deep) */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --shadow-glow: 0 0 15px rgba(29, 91, 150, 0.2);

  /* Typographie */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base: 17px;
  --line-height: 1.6;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

::selection {
  background: var(--secondary);
  color: var(--bg-dark);
}

body {
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--text-main);
  background-color: var(--bg-main);
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(at 0% 0%, rgba(29, 91, 150, 0.03) 0px, transparent 50%), 
                    radial-gradient(at 100% 100%, rgba(250, 181, 20, 0.03) 0px, transparent 50%);
  background-attachment: fixed;
}

/* NAVIGATION GLASSMORPHISM */
header {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.8rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  text-decoration: none;
}

.logo img {
  height: 60px;
  width: auto;
  transition: transform 0.3s ease;
}

.logo:hover img {
  transform: scale(1.05);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.site-tagline {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* MODERN NAV LINKS */
.nav-list {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

.nav-link {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 600;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.nav-link:hover, .nav-link.active {
  background: rgba(29, 91, 150, 0.08);
  color: var(--primary);
}

/* DROPDOWN EVOLUTIONS */
.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 220px;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius);
  z-index: 10;
  list-style: none;
  border: 1px solid var(--border);
  padding: 0.8rem;
  margin-top: 0.5rem;
  animation: slideDropdown 0.3s ease;
}

@keyframes slideDropdown {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.nav-item:hover .dropdown-content {
  display: block;
}

.dropdown-link {
  padding: 0.7rem 1rem;
  text-decoration: none;
  color: var(--text-main);
  display: block;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.dropdown-link:hover {
  background: var(--bg-subtle);
  color: var(--primary);
}

/* LAYOUT & CARDS */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.main-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2.5rem;
  margin: 3rem 0;
}

.content-card {
  background: var(--bg-card);
  padding: 3rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.content-card::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 6px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--bg-dark);
  margin-bottom: 2rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

h2 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
}

/* SIDEBAR WIDGETS PRO MAX */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.widget {
  background: white;
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.widget::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 6px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

/* HERO SECTION - THE WOW FACTOR */
.hero {
  position: relative;
  height: 450px;
  border-radius: var(--radius-lg);
  margin-top: 2rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-dark);
}

.hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(45deg, rgba(15, 23, 42, 0.8), rgba(29, 91, 150, 0.4));
  z-index: 1;
}

.hero img.hero-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
  padding: 0 2rem;
}

.hero-title {
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  margin-bottom: 1rem;
  text-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* PREMIUM BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-decoration: none;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background: var(--secondary);
  color: var(--bg-dark);
  box-shadow: 0 4px 14px rgba(250, 181, 20, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  background: var(--secondary-hover);
  box-shadow: 0 6px 20px rgba(250, 181, 20, 0.6);
}

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

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

/* FOOTER MODERN */
footer {
  margin-top: 5rem;
  background: var(--bg-dark);
  color: #94A3B8;
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

footer::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 6px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.footer-link {
  color: white;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s;
}

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

/* UTILS */
.breadcrumb {
  margin: 1.5rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.lead {
  font-size: 1.35rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .main-layout { grid-template-columns: 1fr; margin: 1.5rem 0; }
  .header-flex { flex-direction: column; text-align: center; gap: 1rem; }
  .nav-list { gap: 0.8rem; justify-content: center; flex-wrap: wrap; }
  .nav-link { padding: 0.5rem 0.8rem; font-size: 0.85rem; }
  .hero { height: 350px; }
  .hero-title { font-size: 2.2rem; word-break: break-word; }
  .hero-content p { font-size: 1.1rem !important; }
  .content-card { padding: 1.5rem; }
  h1 { font-size: 2rem; }
  h2 { word-break: break-word; }
  .btn-group { flex-direction: column; }
  .btn { width: 100%; }
}

@media (max-width: 600px) {
  .site-title { font-size: 1.2rem !important; }
  .nav-list { gap: 0.5rem; flex-wrap: wrap; justify-content: center; }
  .nav-link { font-size: 0.75rem; padding: 0.4rem 0.6rem; }
  .hero { height: 300px; }
  .hero-title { font-size: 1.8rem; }
  .widget { padding: 1.2rem; }
  .content-card { padding: 1.2rem; }
  h1 { font-size: 1.8rem; word-break: break-word; }
  h2 { font-size: 1.5rem; word-break: break-word; }
  body { overflow-x: hidden; } /* Prevents horizontal scroll from wide elements */
}