:root {
  --body-bg: #d4ff8a;
  --main-bg: #defcf0;
  --card-bg: linear-gradient(rgba(232,255,252,1), rgba(207,250,245,1));
  --text-main: #0a2e21;
  --text-soft: #1a5c6b;
  --accent: #0c8b47;
  --accent-soft: #9bc3cc;
  --danger: #c0392b;
  --white: #ffffff;
  --shadow: -4px 4px 6px rgba(0,0,0,0.12);
  --shadow-hard: -2px 2px 2px rgba(0,0,0,0.2);
  --radius: 14px;
}
* { box-sizing: border-box; }
body.app-body {
  margin: 0;
  font-family: 'Roboto Condensed', sans-serif;
  background: linear-gradient(180deg, white 0%, var(--body-bg) 30%, var(--body-bg) 80%, white 100%);
  color: var(--text-main);
}
.app-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px;
}
.app-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: var(--main-bg);
  border-radius: 18px;
  padding: 20px 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.app-kicker {
  margin: 0 0 6px;
  text-transform: uppercase;
  color: var(--text-soft);
  letter-spacing: .08em;
  font-size: .82rem;
}
.app-title {
  margin: 0;
  font-family: 'Sour Gummy', sans-serif;
  color: var(--accent);
  font-size: clamp(2rem, 4vw, 2.7rem);
  text-shadow: var(--shadow-hard);
}
.app-nav { display:flex; gap:14px; flex-wrap: wrap; }
.app-nav a, .btn {
  text-decoration: none;
  color: var(--text-main);
  background: #fff;
  border: 1px solid var(--accent-soft);
  border-radius: 12px;
  padding: 10px 14px;
  box-shadow: var(--shadow);
}
.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 24px;
}
.panel, .card {
  background: var(--main-bg);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 22px;
}
.section-card {
  background: var(--card-bg);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}
.h2, h2, h3 {
  font-family: 'Sour Gummy', sans-serif;
}
.form-grid {
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
}
.form-group { display:flex; flex-direction:column; gap:6px; }
.form-group.full { grid-column: 1 / -1; }
input, select, textarea, button {
  font: inherit;
}
input, select, textarea {
  width:100%;
  padding: 10px 12px;
  border: 1px solid var(--accent-soft);
  border-radius: 10px;
  background: #fff;
}
textarea { min-height: 120px; resize: vertical; }
button.btn, .btn-primary {
  cursor: pointer;
  background: var(--accent);
  color: white;
  border: none;
}
.table-wrap { overflow:auto; }
table {
  width:100%;
  border-collapse: collapse;
  background:white;
  border-radius: 14px;
  overflow: hidden;
}
th, td { padding: 12px 14px; border-bottom: 1px solid #e3f0ec; text-align:left; }
th { background: #eefbf5; }
.alert {
  background: #fffbea;
  border: 1px solid #f0df98;
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
}
.lesson-meta {
  display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin-bottom: 18px;
}
.lesson-meta .pill {
  padding: 6px 10px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--accent-soft);
}
.quiz-option {
  display:block;
  width:100%;
  text-align:left;
  margin-bottom:10px;
  background:#fff;
  color:var(--text-main);
  border:1px solid #ccd;
  border-radius:12px;
  padding:14px;
}
@media (max-width: 820px) {
  .grid-2, .form-grid { grid-template-columns: 1fr; }
  .app-topbar { flex-direction: column; align-items: flex-start; }
}