:root {
  --bg: #f4f1ea;
  --card: #ffffff;
  --ink: #222;
  --muted: #6b6b6b;
  --brand: #2f5d50;
  --brand-dark: #244a40;
  --error-bg: #fbe4e4;
  --error-ink: #a33;
  --info-bg: #e3f0ec;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 1.2rem;
  background: var(--brand);
  color: #fff;
  flex-wrap: wrap;
}

.topbar .brand { font-weight: 700; color: #fff; text-decoration: none; font-size: 1.1rem; }
.topbar nav { display: flex; gap: 1rem; flex: 1; }
.topbar nav a { color: #e7f0ec; text-decoration: none; }
.topbar nav a:hover { text-decoration: underline; }
.topbar .who { color: #e7f0ec; font-size: 0.9rem; }
.topbar .who a { color: #fff; }

.container { max-width: 640px; margin: 2rem auto; padding: 0 1rem; }

h1 { margin-top: 0.2rem; }
.hint { color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid #e2ddd3;
  border-radius: 10px;
  padding: 1.2rem;
  margin: 1rem 0;
}

.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 560px) { .cards { grid-template-columns: 1fr; } }
.card.link { display: block; text-decoration: none; color: inherit; }
.card.link:hover { border-color: var(--brand); }

label { display: block; margin-bottom: 0.8rem; font-weight: 600; }
label.inline { display: flex; align-items: center; gap: 0.4rem; font-weight: 400; }
input[type="text"], input[type="password"], input[type="url"], input[type="file"] {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.55rem 0.6rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  background: var(--brand);
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 0.55rem 1rem;
  font-size: 1rem;
  cursor: pointer;
}
button:hover { background: var(--brand-dark); }
button:disabled { opacity: 0.6; cursor: default; }

.flash { padding: 0.7rem 1rem; border-radius: 6px; margin: 0.8rem 0; }
.flash.error { background: var(--error-bg); color: var(--error-ink); }
.flash.info { background: var(--info-bg); color: var(--brand-dark); }

.hidden { display: none !important; }
#feedback.correct { color: var(--brand-dark); font-weight: 600; }
#feedback.incorrect { color: var(--error-ink); font-weight: 600; }