@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@300;400;500;600&display=swap');

:root{
  --bg: #f4f4f6;        /* fond général doux */
  --paper: #ffffff;     /* cartes / viewer */
  --ink: #111111;       /* texte principal */
  --muted: #6b6b6b;     /* texte secondaire */
  --accent: #3a3a3c;    /* boutons / liens */
  --border: #e5e5e5;    /* bordures légères */
  --radius: 14px;
  --shadow: 0 6px 18px rgba(0,0,0,0.06);
}

*{
  box-sizing:border-box;
}

body{
  margin:0;
  padding:16px;
  font-family:"Manrope", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height:1.6;
  color:var(--ink);
  background:var(--bg);
}

header, footer{
  text-align:center;
}

h1{
  margin:6px 0 0;
  font-size:1.8rem;
  font-weight:600;
}

header p{
  margin:6px 0 16px;
  color:var(--muted);
  font-size:0.95rem;
}

.app{
  width:min(100%, 760px);
  margin:0 auto;
}

/* ===== Boutons saisons ===== */
.buttons{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:center;
  margin-bottom:14px;
}

.season-btn{
  cursor:pointer;
  border:1px solid var(--border);
  background:var(--paper);
  color:var(--accent);
  padding:10px 14px;
  border-radius:999px;
  font-size:0.95rem;
  transition:
    background .15s ease,
    box-shadow .15s ease,
    border-color .15s ease,
    transform .15s ease,
    color .15s ease;
}

.season-btn:hover{
  transform: translateY(-1px);
  box-shadow:0 8px 20px rgba(0,0,0,0.06);
  border-color:#d4d4d8;
  background:#f9fafb;
  color:#111111;
}

.season-btn.active{
  background:var(--accent);
  color:#ffffff;
  border-color:var(--accent);
}

/* ===== Zone image ===== */
.viewer{
  display:grid;
  gap:8px;
  justify-items:center;
  border:1px solid var(--border);
  background:var(--paper);
  border-radius:var(--radius);
  padding:12px;
  box-shadow:var(--shadow);
}

.viewer img{
  max-width:100%;
  height:auto;
  border-radius:12px;
  display:block;
  background:#f3f4f6;
}

.viewer figcaption{
  color:var(--muted);
  font-size:0.9rem;
}

/* ===== Lien retour ===== */
.back{
  display:inline-block;
  margin-top:16px;
  text-decoration:none;
  color:var(--accent);
  background:#ffffff;
  border:1px solid var(--border);
  border-radius:999px;
  padding:6px 12px;
  font-size:0.9rem;
  transition:
    background .15s ease,
    transform .15s ease,
    border-color .15s ease,
    box-shadow .15s ease,
    color .15s ease;
}

.back:hover{
  background:#f3f4f6;
  border-color:#d4d4d8;
  transform:translateY(-1px);
  box-shadow:0 6px 16px rgba(0,0,0,0.06);
  color:#111111;
}

/* ===== Focus accessibilité ===== */
button:focus-visible,
a:focus-visible{
  outline:3px solid #d4d4d8;
  outline-offset:2px;
}