/* Habillage léger, CSS pur (pas de framework), adapté au mobile. */
:root {
  --accent: #0f766e;
  --accent-dark: #115e59;
  --bg: #f4f6f6;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e3e6e8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow-wrap: anywhere; /* les endpoints et clés sont de longues chaînes sans espace */
}
header {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 24px;
  background: var(--accent); color: #fff;
}
header img { width: 44px; height: 44px; flex: none; border-radius: 10px; background: #fff; }
header h1 { margin: 0; font-size: 1.3rem; }
header p { margin: 0; opacity: .9; font-size: .95rem; }
main { max-width: 820px; margin: 0 auto; padding: 20px 16px 40px; }
section {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 20px; margin-bottom: 16px;
}
h2 {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  margin: 0 0 10px; font-size: 1.05rem; color: var(--accent-dark);
}
p { margin: 8px 0; }
b { color: var(--accent-dark); }
button {
  font: inherit; padding: 8px 16px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent); color: #fff;
}
button:hover { background: var(--accent-dark); }
#unsubscribe, #reload { background: #fff; color: var(--accent-dark); }
input { font: inherit; padding: 6px 9px; border: 1px solid #cbd5e1; border-radius: 6px; max-width: 100%; }
input[type=number] { width: 80px; }
label { display: block; margin: 8px 0; }
form input:not([type=number]) { display: block; width: 100%; margin-top: 4px; }
code, pre { font-family: ui-monospace, Consolas, monospace; font-size: .85rem; }
pre {
  margin: 0; padding: 10px; border-radius: 6px;
  background: #f3f4f6; overflow: auto; max-height: 280px; white-space: pre-wrap;
}
img { max-width: 100%; }
.muted { color: var(--muted); font-size: .9rem; }
#message { color: #b91c1c; }
#message:empty { display: none; }
nav {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px;
  color: var(--muted); font-size: .9rem; padding: 10px 16px 30px;
}
a { color: var(--accent-dark); }

/* Téléphone */
@media (max-width: 600px) {
  body { font-size: 15px; }
  header { padding: 12px 16px; gap: 10px; }
  header img { width: 36px; height: 36px; }
  header h1 { font-size: 1.05rem; }
  header p { font-size: .85rem; }
  main { padding: 12px 12px 30px; }
  section { padding: 14px; margin-bottom: 12px; border-radius: 8px; }
  button { width: 100%; padding: 12px 16px; }
  #reload { width: auto; padding: 6px 12px; }
  pre { max-height: 220px; }
}