@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  /* --- Palette — calée sur les bleus du logo MathsMDE --- */
  --nuit: #002a60;         /* structure, en-têtes (bleu profond du logo) */
  --nuit-clair: #0050a0;   /* bleu intermédiaire du logo */
  --bleu-mde: #176fd4;     /* actions principales */
  --or: #7fb3ff;           /* accent clair (halo, badge, réussite) — bleu clair du logo */
  --or-clair: #d0e4ff;     /* accent très clair — teinte exacte du dégradé du logo */
  --parchemin: #eef5ff;    /* fond des cartes */
  --parchemin-fonce: #dde9fb;
  --encre: #16233a;        /* texte principal */
  --encre-douce: #55677e;  /* texte secondaire */
  --corail: #d9564a;       /* erreur / verrouillé */
  --sauge: #3f8f5f;        /* succès */
  --bordure: #cddbef;

  /* --- Typographie --- */
  --police-titre: 'Fraunces', Georgia, serif;
  --police-texte: 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--police-texte);
  background: var(--parchemin);
  color: var(--encre);
  min-height: 100vh;
}
h1, h2, h3 { font-family: var(--police-titre); }

/* Filigrane "lignes de niveau" — motif de contours topographiques, discret */
.mde-fond-topo {
  background-image:
    radial-gradient(circle at 20% 20%, transparent 38px, rgba(0,42,96,0.045) 39px, rgba(0,42,96,0.045) 40px, transparent 41px),
    radial-gradient(circle at 20% 20%, transparent 68px, rgba(0,42,96,0.035) 69px, rgba(0,42,96,0.035) 70px, transparent 71px),
    radial-gradient(circle at 85% 75%, transparent 48px, rgba(0,42,96,0.04) 49px, rgba(0,42,96,0.04) 50px, transparent 51px),
    radial-gradient(circle at 85% 75%, transparent 84px, rgba(0,42,96,0.03) 85px, rgba(0,42,96,0.03) 86px, transparent 87px);
  background-repeat: no-repeat;
  background-size: cover;
}

/* ---------- En-tête commun ---------- */
.mde-entete {
  background: var(--nuit);
  background-image: linear-gradient(120deg, var(--nuit) 0%, var(--nuit-clair) 100%);
  padding: 14px 26px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 10px rgba(0,42,96,0.25);
}
.mde-entete img { height: 40px; border-radius: 50%; background: #fff; padding: 2px; }
.mde-entete .mde-entete-titre {
  font-family: var(--police-titre);
  font-weight: 600;
  color: #fff;
  font-size: 19px;
  letter-spacing: 0.2px;
}
.mde-entete .mde-entete-soustitre {
  color: var(--or-clair);
  font-size: 13px;
  margin-left: 2px;
  padding-left: 10px;
  border-left: 1px solid rgba(255,255,255,0.25);
}
.mde-entete-droite { margin-left: auto; }
.mde-entete-droite a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  background: rgba(255,255,255,0.12);
  padding: 7px 14px;
  border-radius: 20px;
  transition: background 0.15s ease;
}
.mde-entete-droite a:hover { background: rgba(255,255,255,0.22); }

/* ---------- Page de connexion ---------- */
.mde-login-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 68px);
  padding: 24px;
}
.mde-login-main.mde-fond-topo { background: var(--parchemin); }
.mde-login-carte {
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--bordure);
  box-shadow: 0 20px 45px rgba(0,42,96,0.12);
  padding: 40px 34px;
  width: 100%;
  max-width: 380px;
  text-align: center;
  position: relative;
}
.mde-login-carte::before {
  content: "";
  position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 56px; height: 4px;
  background: var(--or);
  border-radius: 0 0 4px 4px;
}
.mde-login-carte img.logo { height: 58px; margin-bottom: 6px; }
.mde-login-carte h1 { margin: 8px 0 2px; font-size: 26px; color: var(--nuit); }
.mde-login-carte .sous-titre { color: var(--encre-douce); font-size: 14px; margin-bottom: 26px; }
.mde-login-carte label { display: block; text-align: left; font-size: 13px; font-weight: 600; margin: 14px 0 5px; color: var(--encre-douce); text-transform: uppercase; letter-spacing: 0.4px; }
.mde-login-carte input[type=email],
.mde-login-carte input[type=password] {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--bordure);
  font-size: 15px; font-family: var(--police-texte); background: var(--parchemin);
  transition: border-color 0.15s ease;
}
.mde-login-carte input:focus { outline: none; border-color: var(--bleu-mde); }
.mde-login-btn {
  width: 100%; margin-top: 22px; padding: 13px; border: none; border-radius: 10px;
  background: var(--nuit); color: #fff; font-weight: 700; font-size: 15px; cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}
.mde-login-btn:hover { background: var(--nuit-clair); }
.mde-login-btn:active { transform: scale(0.98); }
.mde-login-erreur {
  background: #fdedec; color: var(--corail); border-radius: 10px; padding: 10px 12px;
  font-size: 14px; margin-bottom: 6px; text-align: left; border: 1px solid #f4c9c4;
}
.mde-login-lien-retour { display: inline-block; margin-top: 20px; font-size: 13px; color: var(--bleu-mde); text-decoration: none; font-weight: 600; }
.mde-login-footer { text-align: center; color: #a89a78; font-size: 12px; padding: 18px; }