:root {
  color-scheme: light;
  --bg: #fff7ff;
  --panel: rgba(255, 255, 255, 0.78);
  --text: #231a2b;
  --muted: rgba(35, 26, 43, 0.62);
  --accent: #7c5cff;
  --accent2: #ff4fc3;
  --danger: #e11d48;
  --ok: #0f766e;
  --border: rgba(35, 26, 43, 0.12);
  --shadow: rgba(25, 10, 35, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: #2d1f0c;
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  overflow-x: hidden;
}

#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -3;
  pointer-events: none;
}

a {
  color: inherit;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 16px 50px var(--shadow);
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.95), rgba(255, 79, 195, 0.9));
}

.brand h1 {
  font-size: 16px;
  margin: 0;
  letter-spacing: 0.3px;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.btn {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  box-shadow: 0 12px 22px rgba(25, 10, 35, 0.06);
}

.btn.primary {
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.95), rgba(255, 79, 195, 0.82));
  border-color: rgba(124, 92, 255, 0.3);
  color: white;
}

.btn.done {
  background: rgba(15, 118, 110, 0.14);
  border-color: rgba(15, 118, 110, 0.35);
  color: rgba(15, 118, 110, 1);
}

.btn.danger {
  background: rgba(225, 29, 72, 0.10);
  border-color: rgba(225, 29, 72, 0.25);
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}

@media (min-width: 900px) {
  .grid {
    grid-template-columns: 360px 1fr;
    align-items: start;
  }
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 16px 50px var(--shadow);
  backdrop-filter: blur(10px);
  padding: 16px;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

.row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.row.wrap {
  flex-wrap: wrap;
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 10px;
}

label {
  font-size: 12px;
  color: var(--muted);
}

input {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
  outline: none;
}

.muted {
  color: var(--muted);
  font-size: 12px;
}

.tasks {
  display: grid;
  gap: 10px;
}

.taskItem {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.72);
}

.taskItem strong {
  font-size: 14px;
}

.taskItem small {
  color: var(--muted);
}

.taskActions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.taskScore {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(15, 118, 110, 0.28);
  background: rgba(15, 118, 110, 0.1);
  color: rgba(15, 118, 110, 1);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
}

.pill {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
}

.frameWrap {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.72);
}

iframe {
  width: 100%;
  height: 560px;
  border: 0;
  display: block;
}

.alert {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.alert.ok {
  border-color: rgba(15, 118, 110, 0.25);
  background: rgba(15, 118, 110, 0.08);
}

.alert.bad {
  border-color: rgba(225, 29, 72, 0.25);
  background: rgba(225, 29, 72, 0.08);
}

.teacher-card {
  grid-column: 1 / -1;
}

.teacher-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(420px, 1.5fr);
  gap: 16px;
}

.teacher-layout textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 10px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.teacher-right .teacher-results-field textarea {
  min-height: 520px;
  font-size: 12px;
  line-height: 1.45;
}

@media (max-width: 980px) {
  .teacher-layout {
    grid-template-columns: 1fr;
  }

  .teacher-right .teacher-results-field textarea {
    min-height: 320px;
  }
}