:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #111827;
  --primary: #5b6cff;
  --border: #e5e7eb;
  --radius: 14px;
  --muted: #6b7280;
}

.dark {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e5e7eb;
}

* {
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

.app {
  display: flex;
  min-height: calc(100vh - 60px);
}

.sidebar {
  width: 260px;
  background: var(--card);
  padding: 28px;
  border-right: 1px solid var(--border);
}

.brand {
  font-family: 'Playfair Display', serif;
  font-size: 30px;
  margin-bottom: 40px;
}

.sidebar nav a {
  display: flex;
  gap: 10px;
  padding: 12px 16px;
  margin-bottom: 6px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  cursor: pointer;
}

.sidebar nav a.active {
  background: var(--primary);
  color: white;
}

.content {
  flex: 1;
  padding: 40px;
}

.view { display: none; }
.view.active { display: block; }

.top-bar {
  display: flex;
  justify-content: space-between;
  margin-bottom: 30px;
}

.card {
  background: var(--card);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

input, select {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
}

button {
  padding: 10px 18px;
  border-radius: 10px;
  border: none;
  background: var(--primary);
  color: white;
  cursor: pointer;
}

.task-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.task-row span {
  flex: 1;
}

.task-done {
  text-decoration: line-through;
  opacity: 0.6;
}

.delete-btn {
  background: transparent;
  border: none;
  color: #ef4444;
  font-size: 18px;
  cursor: pointer;
}

.progress-bar {
  height: 14px;
  background: #eaeaf5;
  border-radius: 20px;
  margin: 12px 0;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #5b6cff, #7c8cff);
  border-radius: 20px;
}

.planner-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.planner-card {
  background: var(--card);
  padding: 20px;
  border-radius: 16px;
  border: 1px solid var(--border);
}

.planner-card h3 {
  color: var(--primary);
}

.syllabus-editor .row {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
}

.syllabus-subject {
  font-size: 18px;
  font-weight: 600;
  margin-top: 20px;
}

.syllabus-chapter {
  margin-left: 20px;
  margin-top: 8px;
}

.syllabus-subtopic {
  margin-left: 40px;
  display: flex;
  gap: 10px;
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 14px 0;
  font-size: 14px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.syllabus-delete {
  background: transparent;
  border: none;
  color: #ef4444;
  cursor: pointer;
  font-size: 14px;
}

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