:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --border: #d9d9d9;
  --accent: #2b6cb0;
  --accent-fg: #ffffff;
  --pravilno: #1f7a3d;
  --napacno: #b3261e;
  --card: #f6f7f9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e8e8e8;
    --muted: #9a9a9a;
    --border: #33363c;
    --accent: #5b9bd5;
    --accent-fg: #0d1117;
    --pravilno: #4caf6e;
    --napacno: #e5675f;
    --card: #1d2025;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1rem;
  padding: .9rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

header .logo {
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
}

header nav a {
  margin-left: 1rem;
  color: var(--accent);
  text-decoration: none;
}
header nav a:hover { text-decoration: underline; }

main {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.5rem 1.2rem 3rem;
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.25rem; }

fieldset {
  border: 1px solid var(--border);
  border-radius: .5rem;
  padding: .8rem 1rem;
  margin: 0 0 1rem;
}
legend { padding: 0 .4rem; color: var(--muted); }

label {
  display: block;
  margin: .4rem 0;
  cursor: pointer;
}
label.poglavje { font-size: .95rem; }

input[type="number"] {
  width: 6rem;
  padding: .3rem .5rem;
  border: 1px solid var(--border);
  border-radius: .3rem;
  background: var(--bg);
  color: var(--fg);
}

.stevilo { margin-bottom: 1rem; }

textarea {
  width: 100%;
  padding: .6rem;
  border: 1px solid var(--border);
  border-radius: .4rem;
  background: var(--bg);
  color: var(--fg);
  font-family: inherit;
  margin-bottom: .8rem;
}

button, .gumb {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-fg);
  border: none;
  padding: .6rem 1.1rem;
  border-radius: .4rem;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  margin: .3rem .5rem .3rem 0;
}
button:hover, .gumb:hover { filter: brightness(1.08); }

.moznost {
  display: block;
  border: 1px solid var(--border);
  border-radius: .4rem;
  padding: .6rem .8rem;
  margin-bottom: .5rem;
  background: var(--card);
}
.moznost:hover { border-color: var(--accent); }
.moznost input { margin-right: .5rem; }

.drzi-nedrzi button, .samoocena button {
  min-width: 9rem;
}

.napredek {
  color: var(--muted);
  font-size: .9rem;
  margin-bottom: .3rem;
}

.vzorcni-odgovor, .razlaga {
  background: var(--card);
  border-radius: .4rem;
  padding: .8rem 1rem;
}

.pravilno { color: var(--pravilno); }
.napacno { color: var(--napacno); }

.povzetek { font-size: 1.15rem; font-weight: 600; }

.opozorilo {
  background: var(--card);
  border-left: 4px solid var(--napacno);
  padding: .6rem 1rem;
  border-radius: .3rem;
}

.prekini {
  color: var(--muted);
  font-size: .9rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}
th, td {
  text-align: left;
  padding: .5rem .6rem;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 600; }