:root {
  color-scheme: light dark;
  --bg: var(--tg-theme-bg-color, #f5f7fb);
  --text: var(--tg-theme-text-color, #111827);
  --hint: var(--tg-theme-hint-color, #6b7280);
  --button: var(--tg-theme-button-color, #2563eb);
  --button-text: var(--tg-theme-button-text-color, #ffffff);
  --card: var(--tg-theme-secondary-bg-color, #ffffff);
  --danger: #dc2626;
  --border: rgba(107, 114, 128, 0.2);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
}
.app {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.user-badge {
  font-size: 14px;
  color: var(--hint);
}
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.module-btn, .submit-btn, .back-btn {
  min-height: 48px;
  border: 0;
  border-radius: 12px;
  padding: 14px;
  font-size: 16px;
  font-weight: 600;
}
.module-btn, .submit-btn {
  background: var(--button);
  color: var(--button-text);
}
.back-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--border);
}
.form-view { display: none; }
.form-view.active, .module-view.active { display: block; }
.module-view.hidden, .form-view.hidden { display: none; }
.field { margin-bottom: 14px; }
label {
  display: block;
  font-size: 14px;
  margin-bottom: 6px;
  color: var(--hint);
}
input, select, textarea {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  font-size: 16px;
  background: #fff;
  color: #111827;
}
textarea { min-height: 100px; resize: vertical; }
.actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}
.error {
  color: var(--danger);
  font-size: 14px;
  margin-top: 10px;
}
.toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 14px;
  display: none;
}
.toast.show { display: block; }