:root {
  --bg: #ffffff;
  --ink: #1c1e21;
  --muted: #525860;
  --accent: #d42831;
  --accent-dark: #7e181d;
  --accent-hover: #7e181d;
  --logo: #e20613;
  --card: #ffffff;
  --line: #dadde1;
  --panel: #f5f6f7;
  --code-bg: #f6f7f8;
  --extra-bg: #fae7e8;
  --extra: #7e181d;
  --shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.1);
  --radius: 0.4rem;
  --nav-h: 3.75rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --mono: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main {
  flex: 1;
  width: min(48rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 3.5rem;
}
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 0.75rem;
}
h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  margin: 1.6rem 0 0.6rem;
}
h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 1rem 0 0.4rem;
}
.why { color: var(--muted); font-size: 1.05rem; margin: 0 0 1.25rem; }
.lede { color: var(--muted); font-size: 1.05rem; margin: 0 0 1.5rem; }
code, pre { font-family: var(--mono); font-size: 0.95em; }
code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius);
}
pre {
  background: var(--code-bg);
  color: var(--ink);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  line-height: 1.45;
}
pre code { padding: 0; background: transparent; }
.box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) * 2);
  box-shadow: var(--shadow);
  padding: 0.95rem 1.1rem;
  margin: 0.8rem 0;
}
.extra {
  border-color: #eea7aa;
  background: var(--extra-bg);
}
.extra h3 { color: var(--extra); margin-top: 0; }
ul, ol { padding-left: 1.25rem; }
li { margin: 0.3rem 0; }
.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.tag-extra { color: var(--extra); }
.note { font-size: 0.95rem; color: var(--muted); }

/* Topbar — zelfde ritme als e-learning.educom.nu */
.educom-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--nav-h);
  background: #fff;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1rem;
}
.educom-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink);
  text-decoration: none;
  min-width: 0;
}
.educom-brand:hover { color: var(--accent); text-decoration: none; }
.educom-brand img {
  width: 32px;
  height: 32px;
  display: block;
}
.educom-brand b {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.educom-nav-label {
  color: var(--muted);
  font-size: 0.9rem;
  padding-left: 0.65rem;
  border-left: 1px solid var(--line);
  white-space: nowrap;
}
.educom-nav-link {
  margin-left: auto;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.25rem 0.75rem;
  white-space: nowrap;
}
.educom-nav-link:hover { color: var(--accent); text-decoration: none; }

nav.crumbs,
main > nav {
  font-size: 0.9rem;
  margin-bottom: 1.1rem;
  color: var(--muted);
}
nav.crumbs a,
main > nav a { color: var(--accent); }

.educom-footer {
  background: var(--panel);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 1.25rem 1rem;
  border-top: 1px solid var(--line);
}

/* Home-kaarten */
.home-section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) * 2);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.2rem;
  margin: 1rem 0;
}
.home-section h2 { margin-top: 0; font-size: 1.2rem; }
.track a { text-decoration: none; font-weight: 600; }
.track a:hover { text-decoration: underline; }

/* Tabs (les 00 setup) */
.tabs {
  display: flex;
  gap: 0.15rem;
  margin: 1.25rem 0 0;
  border-bottom: 1px solid var(--line);
}
.tab-btn {
  appearance: none;
  border: none;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.55rem 0.9rem;
  cursor: pointer;
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--ink); }
.tab-btn[aria-selected="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.tab-panel {
  display: none;
  background: var(--card);
  border: 1px solid var(--line);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 1rem 1.1rem 1.15rem;
  margin: 0 0 1rem;
}
.tab-panel.is-active { display: block; }
.tab-panel h3 { margin-top: 0.85rem; }
.tab-panel h3:first-child { margin-top: 0; }

/* Mail-seintje */
.seintje {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) * 2);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem 1.15rem;
  margin: 1rem 0 0.4rem;
  font-size: 0.95rem;
}
.seintje h2 { margin-top: 0; font-size: 1.25rem; }
.seintje label {
  display: block;
  font-weight: 600;
  margin: 0.7rem 0 0.25rem;
  font-size: 0.88rem;
}
.seintje input[type="text"],
.seintje select,
.seintje textarea {
  width: 100%;
  font: inherit;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.seintje textarea { min-height: 4.5rem; resize: vertical; }
.seintje .status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 0.35rem 0 0.2rem;
}
.seintje .status-row label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
  margin: 0;
  cursor: pointer;
}
.seintje-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.9rem;
}
.seintje-actions button {
  appearance: none;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 650;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius);
  cursor: pointer;
}
.seintje-actions button.secondary {
  background: #fff;
  color: var(--accent);
}
.seintje-actions button:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.seintje-msg {
  margin: 0.55rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
  min-height: 1.2em;
}
.seintje-preview {
  margin-top: 0.85rem;
  padding: 0.7rem 0.8rem;
  background: var(--code-bg);
  color: var(--ink);
  border-radius: var(--radius);
  white-space: pre-wrap;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.45;
}
.seintje .hint { color: var(--muted); font-size: 0.88rem; margin: 0 0 0.6rem; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 0.8rem 0 1.2rem;
}
th, td {
  border: 1px solid var(--line);
  padding: 0.45rem 0.6rem;
  text-align: left;
  vertical-align: top;
}
th { background: var(--panel); }
.file-list { list-style: none; padding: 0; margin: 0.4rem 0 0; }
.file-list li { margin: 0.2rem 0; }
.file-list a { font-family: var(--mono); font-size: 0.9rem; }
.prose main { max-width: 48rem; }

.demo-files {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.85rem;
}
.demo-chip {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  background: var(--extra-bg);
  border: 1px solid #eea7aa;
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  text-decoration: none;
}
.demo-chip:hover { background: #fae7e8; color: var(--accent-dark); text-decoration: none; }

#demo-kijk {
  width: min(52rem, calc(100vw - 1.5rem));
  max-height: calc(100vh - 2rem);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) * 2);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}
#demo-kijk::backdrop { background: rgba(28, 30, 33, 0.45); }
.demo-kijk-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: 0;
}
.demo-kijk-bar strong {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 650;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.demo-kijk-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }
.demo-kijk-actions a,
.demo-kijk-actions button {
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
}
.demo-kijk-actions a:hover,
.demo-kijk-actions button:hover { border-color: var(--accent); color: var(--accent); }
.demo-kijk-code {
  margin: 0;
  padding: 1rem 1.1rem 1.25rem;
  background: var(--code-bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.45;
  white-space: pre-wrap;
  overflow: auto;
  max-height: calc(100vh - 6rem);
  border-radius: 0;
}
.demo-kijk-img { padding: 1rem; text-align: center; }
.demo-kijk-img img { max-width: 100%; height: auto; }