/* MakeCode Arcade – undervisningssider */
:root {
  --arcade-blue: #2c3e50;
  --arcade-accent: #0055cc;
  --arcade-light: #f4f4f9;
  --arcade-card: #ffffff;
  --arcade-code: #0f172a;
  --arcade-green: #2e7d32;
  --arcade-orange: #d97706;
  --arcade-red: #c62828;
  --arcade-border: #d9dce3;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--arcade-light);
  margin: 0;
  line-height: 1.6;
  color: #222;
}

header {
  background: var(--arcade-blue);
  color: white;
  padding: 1.5rem 1rem;
  text-align: center;
}

header h1 { color: white; margin: .2rem 0 .4rem; }
header p { margin: 0; opacity: .92; }

nav.arcade-nav {
  background: #fff;
  border-bottom: 1px solid var(--arcade-border);
  padding: .7rem 1rem;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 10;
}

nav.arcade-nav a {
  display: inline-block;
  margin: .2rem .5rem;
  font-weight: 650;
}

main {
  max-width: 950px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  background: var(--arcade-card);
  margin-bottom: 1.4rem;
  padding: 1.25rem 1.5rem;
  border-radius: .7rem;
  border: 1px solid rgba(0,0,0,.06);
  box-shadow: 0 2px 6px rgba(0,0,0,.08);
}

h1, h2, h3 { color: var(--arcade-blue); }
h2 { margin-top: 0; }

.step {
  border-left: 5px solid var(--arcade-accent);
  padding-left: 1rem;
}

.goal, .tip, .warning, .teacher {
  padding: .85rem 1rem;
  border-radius: .5rem;
  margin: 1rem 0;
}

.goal { background: #eef6ff; border-left: 5px solid var(--arcade-accent); }
.tip { background: #eef9f0; border-left: 5px solid var(--arcade-green); }
.warning { background: #fff6e8; border-left: 5px solid var(--arcade-orange); }
.teacher { background: #f5f0ff; border-left: 5px solid #7652a8; }

pre {
  background: var(--arcade-code);
  color: #e5e7eb;
  padding: 1rem;
  border-radius: .5rem;
  overflow: auto;
  white-space: pre-wrap;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.kbd {
  display: inline-block;
  padding: .05rem .4rem;
  border: 1px solid #aaa;
  border-bottom-width: 2px;
  border-radius: .3rem;
  background: #fafafa;
  font-family: monospace;
}

details {
  margin: 1rem 0;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: .4rem;
  padding: .6rem 1rem;
}

details summary {
  font-weight: 700;
  cursor: pointer;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: .8rem;
  margin: 1rem 0;
}

.concept-card {
  background: #fff;
  border: 1px solid var(--arcade-border);
  border-radius: .55rem;
  padding: .9rem;
}

.concept-card h3 { margin: .1rem 0 .3rem; font-size: 1.05rem; }

.searchbox {
  width: 100%;
  padding: .8rem 1rem;
  font-size: 1rem;
  border: 2px solid #bbb;
  border-radius: .5rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: .8rem 0 1.2rem;
}

.filters button {
  border: 1px solid #bbb;
  background: #fff;
  border-radius: 999px;
  padding: .45rem .8rem;
  cursor: pointer;
}

.filters button.active {
  background: var(--arcade-blue);
  color: #fff;
}

.concept {
  border: 1px solid var(--arcade-border);
  border-radius: .6rem;
  padding: 1rem;
  margin: .8rem 0;
  background: #fff;
}

.concept[hidden] { display: none; }

.badge {
  display: inline-block;
  font-size: .78rem;
  padding: .15rem .5rem;
  border-radius: 999px;
  background: #e9eef7;
  margin-right: .35rem;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

footer {
  text-align: center;
  font-size: .9rem;
  padding: 1rem;
  color: #777;
}

a { color: var(--arcade-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

@media (max-width: 650px) {
  section { padding: 1rem; }
  main { margin-top: 1rem; }
}