/* -------------------------------
   Variables & styles généraux
---------------------------------*/
:root {
  --bg-page: #0f172a;
  --bg-alt: #020617;
  --bg-card: #111827;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.1);
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --border-subtle: #1f2937;
  --danger: #f97373;
  --radius-lg: 1.25rem;
  --radius-md: 0.75rem;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.8);
  --shadow-card: 0 10px 30px rgba(15, 23, 42, 0.5);
  --transition-fast: 0.2s ease;
  --container-width: 1100px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #0b1120, #020617 55%);
  color: var(--text-main);
}

/* Pour les vieux navigateurs */
body {
  min-height: 100vh;
}

/* -------------------------------
   Layout principal
---------------------------------*/

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: radial-gradient(circle at top right, #020617, #020617 40%, #020617);
}

/* -------------------------------
   Header & navigation
---------------------------------*/

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: linear-gradient(to right, rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.9));
  border-bottom: 1px solid rgba(15, 23, 42, 0.8);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-symbol {
  font-size: 1.4rem;
}

.logo-text {
  font-weight: 600;
  letter-spacing: 0.03em;
  font-size: 0.95rem;
  text-transform: uppercase;
  color: var(--text-main);
}

.main-nav {
  display: flex;
  gap: 1.5rem;
}

.main-nav a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--text-muted);
  padding-bottom: 0.25rem;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.main-nav a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* -------------------------------
   Hero
---------------------------------*/

.hero {
  padding: 4rem 0 3.5rem;
}

.hero-content {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.4fr);
  gap: 2.5rem;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(1.95rem, 3vw, 2.4rem);
  line-height: 1.25;
  margin: 0 0 1rem;
}

.hero-text p {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.98rem;
  max-width: 34rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

/* Boutons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #0b1120;
  font-weight: 600;
  box-shadow: 0 16px 30px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 40px rgba(56, 189, 248, 0.35);
}

.btn-secondary {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.5);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(15, 23, 42, 0.85);
}

/* Carte à droite du hero */
.hero-card {
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.07), #020617);
  border-radius: var(--radius-lg);
  padding: 1.8rem 1.6rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(30, 64, 175, 0.6);
}

.hero-card h2 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
}

.hero-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hero-card li {
  font-size: 0.95rem;
  padding: 0.4rem 0;
  color: var(--text-muted);
  border-bottom: 1px dashed rgba(31, 41, 55, 0.8);
}

.hero-card li:last-child {
  border-bottom: none;
}

/* -------------------------------
   Sections génériques
---------------------------------*/

.section-content h2 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
}

.section-content p {
  font-size: 0.96rem;
  color: var(--text-muted);
  max-width: 46rem;
}

.list {
  list-style: none;
  margin: 1rem 0;
  padding: 0;
}

.list li {
  padding-left: 1.25rem;
  position: relative;
  margin-bottom: 0.4rem;
  color: var(--text-main);
  font-size: 0.96rem;
}

.list li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0.1rem;
  color: var(--accent);
}

/* Disposition deux colonnes */
.two-columns {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.3fr);
  gap: 2rem;
  align-items: flex-start;
}

/* Carte générique */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.3rem;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
}

/* -------------------------------
   Infos pratiques
---------------------------------*/

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.info-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.3rem 1.2rem;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
}

.info-card h3 {
  margin: 0 0 0.7rem;
  font-size: 1rem;
}

.info-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* -------------------------------
   Contact
---------------------------------*/

.contact-box {
  margin-top: 1rem;
  padding: 1.5rem 1.3rem;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.6);
}

.contact-box code {
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(30, 64, 175, 0.7);
  font-size: 0.85rem;
}

/* -------------------------------
   Footer
---------------------------------*/

.site-footer {
  border-top: 1px solid rgba(15, 23, 42, 0.8);
  background: #020617;
  padding: 1.2rem 0 1.5rem;
}

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

.footer-content p {
  margin: 0.1rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-note {
  font-size: 0.8rem;
  opacity: 0.8;
}

/* -------------------------------
   Responsive
---------------------------------*/

@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-card {
    order: -1;
  }

  .two-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .info-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .main-nav {
    display: none; /* Version simple : pas de menu sur petit écran (à améliorer plus tard si tu veux un burger menu) */
  }

  .hero {
    padding-top: 3rem;
  }
}

@media (max-width: 600px) {
  .header-content {
    padding: 0.7rem 0;
  }

  .hero-text h1 {
    font-size: 1.6rem;
  }

  .hero-card {
    padding: 1.4rem 1.2rem;
  }
}

.mail-link {
  color: #0077cc;
  font-weight: 600;
  text-decoration: underline;
}
.mail-link:hover {
  opacity: 0.8;
}