:root {
  color-scheme: light;
  font-family: "Verdana", "Geneva", sans-serif;
  background: #f6f6ef;
  color: #000;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #f6f6ef;
  color: #000;
}

.page {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  width: 100%;
  min-height: 100vh;
  padding: 2rem;
}

@media (min-width: 900px) {
  .page {
    grid-template-columns: minmax(220px, 20%) minmax(0, 80%);
  }
}

.panel {
  background-color: #f6f6ef;
  border-radius: 6px;
  padding: 2rem;
  border: 1px solid #828282;
  box-shadow: none;
  display: flex;
  flex-direction: column;
}

@media (min-width: 900px) {
  .panel {
    min-height: calc(100vh - 4rem);
  }
}

h1 {
  margin: 0 0 0.75rem;
  font-size: 1.75rem;
  color: #000;
}

.lead {
  margin: 0 0 1.5rem;
  color: #444;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.token-save-btn {
  align-self: flex-start;
}

.token-status {
  margin: -0.5rem 0 0;
  font-size: 0.85rem;
  color: #666;
}

.token-saved {
  background-color: #f0f0f0;
  color: #666;
}

.input-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: #828282;
}

input[type="password"],
input[type="file"] {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  border: 1px solid #b8b8b8;
  background-color: #fff;
  font-size: 0.95rem;
}

.primary-btn,
.secondary-btn {
  cursor: pointer;
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid #828282;
  transition: background 0.15s ease, border 0.15s ease;
}

.primary-btn {
  background: #ff6600;
  color: #000;
  border-color: #ff6600;
}

.primary-btn:hover {
  background: #ff8533;
  border-color: #ff8533;
}

.secondary-btn {
  background: #f6f6ef;
  color: #000;
  margin-top: 1.5rem;
}

.secondary-btn:hover {
  background: #fff7e6;
  border-color: #7f7f7f;
}

.panel-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: #666;
}

.panel-footer p {
  margin: 0;
}

.status {
  font-size: 1rem;
  color: #828282;
  margin-bottom: 1.5rem;
}

.hidden {
  display: none;
}

.lesson-panel {
  display: flex;
  flex-direction: column;
}

.lecture {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  flex: 1;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.lesson-card {
  background: #fff;
  border-radius: 6px;
  padding: 1.5rem;
  border: 1px solid #d0d0d0;
  box-shadow: none;
}

.lesson-card h2 {
  margin-top: 0;
  font-size: 1.25rem;
  color: #000;
}

.lesson-card p {
  margin: 0.75rem 0;
  line-height: 1.6;
  color: #333;
}

.question {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 6px;
  background: #fff;
  border: 1px solid #d0d0d0;
}

.question strong {
  display: block;
  color: #000;
  margin-bottom: 0.5rem;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.option-btn {
  padding: 0.65rem 0.75rem;
  border-radius: 6px;
  border: 1px solid #d0d0d0;
  background: #fff;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease, border 0.15s ease;
}

.option-btn:hover {
  background: #fff7e6;
}

.option-btn.correct {
  background: #f0ffe0;
  border-color: #73bd3f;
}

.option-btn.incorrect {
  background: #ffe5dc;
  border-color: #d06b4e;
}

.feedback {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: #444;
}

.summary-card {
  background: #fff;
  border-radius: 6px;
  padding: 1.5rem;
  border: 1px solid #d0d0d0;
}

.summary-card h2 {
  margin-top: 0;
  color: #000;
}