/* ===== Variables & Reset ===== */
:root {
  --color-primary: #0056b3;
  --color-primary-dark: #003f88;
  --color-bg: #f5f7fa;
  --color-text: #1a1a1a;
  --color-muted: #6c757d;
  --radius: 12px;
  --transition: 0.25s ease;
}

html, body {
  height: 100%; 
}

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

body {
  font-family: "Inter", "Segoe UI", Roboto, sans-serif;
  background-color: var(--color-bg);
  background-image: url("../images/nav-chart.png");
  background-repeat: no-repeat;
  background-position: center center;
  background-attachment: fixed;
  background-size: cover; /* ou "contain" si tu veux voir toute l’image */
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}


/* ===== Header ===== */
.site-header {
  text-align: center;
  padding: 1.2rem 1rem;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.site-header .logo {
  height: 48px;
  margin-bottom: 0.6rem;
}

.site-header h1 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.site-header p {
  font-size: 0.9rem;
  opacity: 0.85;
}

/* ===== Footer ===== */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  text-align: center;
  padding: 0.9rem 1rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  background: rgba(255, 255, 255, 0.95);
  border-top: 1px solid #eee;
  backdrop-filter: blur(6px);
  z-index: 100;
  margin-top: 60px;
}

.site-footer a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}

.site-footer .muted {
  opacity: 0.75;
}