:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-soft: #fbfcfe;
  --border: #d9e0ec;
  --text: #233a63;
  --muted: #5f7392;
  --primary: #334ea2;
  --primary-soft: #e8edfb;
  --accent: #e25830;
  --gold: #f4b536;
  --success-bg: #e8f8ee;
  --success-fg: #166534;
  --warn-bg: #fff7ed;
  --warn-fg: #9a3412;
  --error-bg: #fee2e2;
  --error-fg: #991b1b;
  --shadow: 0 12px 40px rgba(35, 58, 99, 0.10);
  --radius: 24px;
}

/* ── Monaco annotatie decoraties ────────────────────────────────────────────── */
/* Deze klassen worden door Monaco gebruikt voor editor decoraties.
   Ze moeten globaal beschikbaar zijn op elke pagina met een Monaco editor. */
.annotation-highlight-yellow { background: rgba(253,224,71,0.30) !important; }
.annotation-highlight-blue   { background: rgba(96,165,250,0.30) !important; }
.annotation-highlight-green  { background: rgba(74,222,128,0.30) !important; }
.annotation-highlight-red    { background: rgba(248,113,113,0.30) !important; }
.annotation-highlight        { background: rgba(253,224,71,0.30) !important; }

.annotation-inline-msg {
  color: rgba(180,180,180,0.9);
  font-style: italic;
  font-size: 0.85em;
  margin-left: 8px;
  pointer-events: none;
}

.annotation-glyph::before {
  content: '📌';
  font-size: 12px;
}

/* ── Dark mode ─────────────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-soft: #1f2335;
  --border: #2e3148;
  --text: #e2e8f0;
  --muted: #8892a4;
  --primary: #5b78d4;
  --primary-soft: #1e2640;
  --accent: #e25830;
  --gold: #f4b536;
  --success-bg: #0d2418;
  --success-fg: #4ade80;
  --warn-bg: #1e1500;
  --warn-fg: #fbbf24;
  --error-bg: #1e0a0a;
  --error-fg: #f87171;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.40);
}

[data-theme="dark"] body {
  background: var(--bg);
}

[data-theme="dark"] .topbar {
  background: #0d0f1a;
  border-bottom: 1px solid var(--border);
}

[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
  background: var(--surface-soft) !important;
  color: var(--text) !important;
  border-color: var(--border) !important;
}

[data-theme="dark"] .btn-muted {
  background: #2e3148;
  color: var(--text);
}

[data-theme="dark"] .btn-soft {
  background: var(--primary-soft);
  color: var(--primary);
}

.dark-toggle {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--muted);
  transition: background 0.15s;
}
.dark-toggle:hover { background: var(--primary-soft); color: var(--primary); }

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #f7f8fb 0%, #fefefe 100%);
  color: var(--text);
}
button, input, textarea { font: inherit; }
button { cursor: pointer; }

.topbar {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  width: min(1320px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
}
.logo-group { display:flex; align-items:center; gap:12px; font-weight:800; font-size:1.2rem; }
.logo-small { width: 38px; height: 38px; border-radius: 10px; object-fit: cover; background:var(--primary-soft); }
.page {
  width: min(1420px, calc(100% - 32px));
  margin: 20px auto;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero {
  min-height: 720px;
  display:grid; grid-template-columns: 1.05fr .95fr;
  gap: 24px; padding: 30px;
}
.hero-panel {
  border-radius: 22px;
  min-height: 620px;
}
.hero-left {
  padding: 38px;
  background: linear-gradient(135deg, rgba(244,181,54,.22) 0%, rgba(255,255,255,1) 56%, rgba(51,78,162,.10) 100%);
  border:1px solid rgba(51,78,162,.18);
  display:flex; flex-direction:column; justify-content:center;
}
.logo-large { width:min(280px, 70%); display:block; margin-bottom:24px; border-radius: 22px; background:var(--primary-soft); }
.hero-left h1 { margin: 0 0 14px; font-size: clamp(2.2rem, 4vw, 4.2rem); line-height:1.05; }
.hero-left p { color:#334155; line-height:1.7; font-size:1.1rem; max-width:52ch; }
.hero-right {
  background:#1f2f57; color:white; overflow:hidden; display:flex; flex-direction:column;
}
.mock-toolbar { min-height:56px; background:#243762; border-bottom:1px solid rgba(255,255,255,.08); padding: 0 16px; display:flex; align-items:center; gap:8px; }
.dot { width:12px; height:12px; border-radius:50%; } .red{background:#ff5f57}.yellow{background:#febc2e}.green{background:#28c840}
.mock-editor { white-space:pre-wrap; flex:1; padding:22px; font-family:Consolas, monospace; line-height:1.8; }
.hero-actions, .row { display:flex; gap:12px; flex-wrap:wrap; }
.btn { min-height:48px; padding:12px 18px; border:none; border-radius:14px; font-weight:800; }
.btn-primary { background: var(--primary); color:white; }
.btn-soft { background: var(--primary-soft); color:var(--primary); }
.btn-muted { background:#eef1f5; color:#304357; }
.btn-danger { background:#fee2e2; color:#991b1b; }
.btn-success { background:#e8f8ee; color:#166534; }
.btn.small { min-height:36px; padding:8px 12px; border-radius:10px; font-size:.95rem; }
.btn:disabled { opacity:.55; cursor:not-allowed; }

.screen { padding: 28px; min-height: 760px; }
.screen h1 { margin: 0 0 10px; font-size: clamp(2rem, 3vw, 3rem); }
.muted { color: var(--muted); }
.grid-2 { display:grid; grid-template-columns: 1.1fr .9fr; gap:22px; }
.panel { border:1px solid var(--border); border-radius:22px; padding:22px; background: var(--surface-soft); }
.input-group { margin-bottom: 16px; }
label { display:block; margin-bottom:8px; font-weight:800; }
input, textarea {
  width:100%; min-height:48px; padding:12px 14px;
  border:1px solid var(--border); border-radius:12px; background:white; outline:none;
}
textarea.code-area {
  min-height: 520px; resize: vertical; border:none; padding:18px;
  background:#071737; color:#f9fbff; font-family:Consolas, monospace; line-height:1.8;
  border-radius:0;
}
.code-area[readonly] { opacity:.85; }
.session-code { font-size: 3rem; font-weight: 900; letter-spacing: .12em; }
.mode-cards { display:grid; grid-template-columns: 1fr 1fr; gap:14px; margin: 12px 0 18px; }
.mode-card { padding:18px; border-radius:18px; border:2px solid var(--border); background:white; }
.mode-card.active { border-color: var(--primary); background:var(--primary-soft); }
.badge { display:inline-flex; padding: 6px 12px; border-radius:999px; background:#eef1f5; font-weight:700; font-size:.9rem; }
.badges { display:flex; gap:8px; flex-wrap:wrap; }

.workspace { display:grid; grid-template-columns: 1.7fr .95fr; gap:22px; min-height: 650px; }
.editor-shell { overflow:hidden; display:flex; flex-direction:column; }
.tabs { padding: 16px 16px 0; display:flex; gap:12px; }
.tab-btn { min-height:42px; padding: 10px 16px; border-radius: 14px; border:1px solid var(--border); background:#eef1f5; color:#304357; font-weight:800; }
.tab-btn.active { background: var(--primary); color:white; border-color: var(--primary); }
.editor-toolbar { min-height:56px; padding:0 16px; background:#243762; border-top:1px solid rgba(255,255,255,.06); border-bottom:1px solid rgba(255,255,255,.06); display:flex; align-items:center; gap:8px; color:white; }
.toolbar-spacer { flex:1; }
.code-grid { display:grid; grid-template-columns: 60px 1fr; min-height:540px; background:#071737; }
.line-numbers {
  background:#243762; color:#eef3ff; padding:18px 10px; text-align:right;
  font-family:Consolas, monospace; line-height:1.8;
}
.line-numbers span { display:block; }
.output-panel {
  min-height:540px; background:#071737; color:#f3ffdd; padding:18px;
  font-family:Consolas, monospace; white-space:pre-wrap;
}
.hidden { display:none !important; }
.sidebar { display:flex; flex-direction:column; gap:18px; }
.student-list { display:flex; flex-direction:column; gap:12px; }
.student-item { background:white; border:1px solid var(--border); border-radius:16px; padding:14px; }
.student-head { display:flex; justify-content:space-between; gap:10px; align-items:start; margin-bottom:10px; }
.status-box { border-radius:16px; padding:16px; font-weight:800; line-height:1.5; min-height:84px; }
.status-info { background:var(--primary-soft); color:var(--primary); }
.status-success { background:var(--success-bg); color:var(--success-fg); }
.status-warning { background:var(--warn-bg); color:var(--warn-fg); }
.status-error { background:var(--error-bg); color:var(--error-fg); }
.runtime-input-wrap { display:flex; gap:10px; padding:16px; background:#071737; border-top:1px solid rgba(255,255,255,.06); }
.runtime-input-wrap input { background:#d9dce3; color:#1f2937; }
.runtime-input-wrap input:disabled, .runtime-input-wrap button:disabled { opacity:.7; }
.session-list { display:flex; flex-direction:column; gap:12px; margin-top:18px; }
.session-row { display:flex; justify-content:space-between; gap:18px; padding:16px; border:1px solid var(--border); border-radius:16px; background:white; align-items:center; }
.top-actions { display:flex; gap:12px; flex-wrap:wrap; align-items:center; }
.inline-note { font-size:.95rem; color:var(--muted); }

@media (max-width: 980px) {
  .hero, .grid-2, .workspace, .mode-cards { grid-template-columns: 1fr; }
  .screen, .hero { min-height:auto; }
}

.checkbox-row {
  display:flex;
  gap:12px;
  align-items:flex-start;
  border:1px solid var(--border);
  border-radius:16px;
  background:white;
  padding:14px 16px;
}
.checkbox-row input[type="checkbox"] {
  width:18px;
  min-height:auto;
  margin-top:4px;
}
#teacher-code-panel,
#student-code-panel {
  width: 100%;
  min-width: 0;
  overflow: hidden;
  background: #1e1e1e;
}
.monaco-editor-host {
  width: 100%;
  height: 540px;
  min-width: 0;
  position: relative;
  background: #1e1e1e;
  overflow: hidden;
}
.monaco-editor-host {
  width: 100%;
  height: 540px;
  min-width: 0;
  position: relative;
  background: #1e1e1e;
  overflow: hidden;
}
.monaco-editor,
.monaco-editor .overflow-guard,
.monaco-editor .monaco-scrollable-element,
.monaco-editor .monaco-editor-background {
  border-radius: 0;
  background:#1a2235 !important;
}


.editor-frame-wrap {
  width: 100%;
  min-width: 0;
  overflow: hidden;
  background: #1e1e1e;
}
.editor-frame {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  width: 100%;
  height: 540px;
  background: #1e1e1e;
}
.custom-gutter {
  height: 540px;
  overflow: hidden;
  background:#1f2f57;
  color: #9fb3c8;
  border-right: 1px solid rgba(255,255,255,.06);
  font-family: Consolas, monospace;
  font-size: 18px;
  line-height: 30px;
  padding-top: 0;
  user-select: none;
}
.gutter-line {
  height: 30px;
  line-height: 30px;
  text-align: right;
  padding-right: 12px;
}
.gutter-line.active {
  color: #ffffff;
  background: rgba(255,255,255,.06);
}
.monaco-editor-host {
  height: 540px;
}

.session-row {
  display:grid;
  grid-template-columns: minmax(0,1fr) auto;
  gap:16px;
  align-items:center;
}
.session-row-main { min-width:0; }
.session-row-actions {
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
}
@media (max-width: 860px) {
  .session-row { grid-template-columns: 1fr; }
  .session-row-actions { justify-content:flex-start; }
}


.badge-success { background:#e8f8ee; color:#166534; }
.badge-warn { background:#fff7ed; color:#9a3412; }

.session-row {
  display:flex;
  flex-direction:column;
  align-items:stretch;
  gap:14px;
}
.session-row-main { min-width:0; }
.session-title-row {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  margin-bottom:12px;
}
.session-title { font-size:1.1rem; }
.session-meta-grid {
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap:10px 16px;
}
.session-meta-grid > div {
  min-width:0;
  padding:10px 12px;
  border-radius:12px;
  background:#f8fbff;
  border:1px solid var(--border);
}
.session-meta-label {
  display:block;
  font-size:.82rem;
  font-weight:700;
  color:var(--muted);
  margin-bottom:4px;
}
.session-meta-value {
  display:block;
  font-weight:800;
  color:var(--text);
  overflow-wrap:anywhere;
}
.session-row-actions {
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-start;
}
@media (max-width: 640px) {
  .session-meta-grid { grid-template-columns: 1fr; }
}


.announcement-compose {
  padding: 18px 20px;
}

.announcement-compose-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: end;
}

.announcement-label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}

.announcement-textarea {
  width: 100%;
  min-height: 92px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid #c7d4e5;
  resize: vertical;
  font: inherit;
  background: #fff;
}

.announcement-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.announcement-card {
  padding: 18px 20px;
  border-left: 5px solid #3b82f6;
  background: #f8fbff;
}

.announcement-title {
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 8px;
  color: #183b66;
}

.announcement-text {
  white-space: pre-wrap;
  line-height: 1.6;
  color: #243b53;
}

@media (max-width: 900px) {
  .announcement-compose-grid {
    grid-template-columns: 1fr;
  }
}

.brand-subtitle {
  margin-top: -4px;
  margin-bottom: 16px;
  color: var(--accent);
  font-weight: 700;
}
.logo-group span { letter-spacing: .01em; }
.logo-small { background: white; padding: 2px; box-shadow: 0 4px 12px rgba(51,78,162,.14); }
.logo-large { width:min(420px, 86%); background: transparent; border-radius: 0; box-shadow:none; }
.btn-primary { background: var(--primary); }
.btn-soft { background: #eef2fb; color: var(--primary); }
.mode-card.active { border-color: var(--primary); background: linear-gradient(135deg, rgba(244,181,54,.18), rgba(51,78,162,.08)); }
.tab-btn.active { background: var(--primary); border-color: var(--primary); }
.mock-editor strong, .accent { color: var(--gold); }


.tab-btn.tab-disabled { opacity:.45; cursor:not-allowed; pointer-events:none; }
.workspace-mode-note { margin-top:10px; }


/* === Teacher header split layout === */
.teacher-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.session-code-row {
  display: flex;
}

.session-code-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--gold);
  color: #1f3b67;
  font-weight: 800;
}

.session-code-badge strong {
  background: rgba(255,255,255,0.4);
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 900;
  letter-spacing: 0.05em;
}

.footer-note {
  margin-top: 40px;
  padding: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  opacity: 0.85;
}