:root {
  /* Colors - Neo-Brutalist Palette based on screenshots */
  --bg-primary: #AED9E0;
  --bg-secondary: #FAFAFA;
  --text-main: #000000;
  --accent-yellow: #FFF176;
  --accent-blue: #80DEEA;
  --accent-orange: #FFAB91;
  --accent-green: #C5E1A5;
  --border-thick: 3px solid #000000;
  --border-thin: 1px solid #000000;
  --shadow: 4px 4px 0px #000000;
  --radius: 12px;
  --font-family: 'Lexend', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  padding: 2rem;
  min-height: 100vh;
  line-height: 1.5;
}

h1, h2, h3 {
  font-weight: 700;
  margin-bottom: 1rem;
}

/* Layout Containers */
.container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.panel {
  background: var(--bg-secondary);
  border: var(--border-thick);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

/* Timetable Grid */
.timetable-wrapper {
  overflow-x: auto;
}

.timetable {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

.timetable th, .timetable td {
  border: var(--border-thin);
  padding: 0.5rem;
  text-align: center;
  font-size: 0.8rem;
  min-width: 60px;
}

.timetable thead th {
  background: #eee;
  font-weight: bold;
}

.timetable .day-col {
  font-weight: bold;
  background: #f9f9f9;
  width: 80px;
}

.slot-occupied {
  background-color: var(--accent-blue);
  font-weight: bold;
}

.slot-header {
  height: 40px;
}

/* Controls Section */
.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.course-selector {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.selector-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

label {
  font-weight: 600;
  font-size: 0.9rem;
}

select, input {
  padding: 0.75rem;
  border: var(--border-thick);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  outline: none;
}

select:focus, input:focus {
  background: var(--accent-yellow);
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border: var(--border-thick);
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform 0.1s;
  box-shadow: 2px 2px 0px #000;
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 0px 0px 0px #000;
}

.btn-primary { background: var(--accent-blue); }
.btn-success { background: var(--accent-green); }
.btn-danger { background: var(--accent-orange); }
.btn-yellow { background: var(--accent-yellow); }

/* List Styles */
.faculty-list {
  background: #fff;
  border: var(--border-thick);
  border-radius: 8px;
  min-height: 200px;
  padding: 1rem;
}

.course-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  border-bottom: var(--border-thin);
  background: #fff;
  margin-bottom: 0.5rem;
  border: var(--border-thin);
  border-radius: 4px;
}

/* Badge */
.badge {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  border: var(--border-thin);
  font-size: 0.7rem;
  font-weight: bold;
  background: var(--accent-yellow);
}

/* Generation Options */
.combinations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.mini-timetable-card {
  border: var(--border-thick);
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.2s;
}

.mini-timetable-card:hover {
  background: var(--accent-yellow);
  transform: translateY(-2px);
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 2px;
  margin-top: 0.5rem;
  background: #000;
  padding: 1px;
}

.mini-cell {
  aspect-ratio: 1;
  background: #eee;
}

.mini-cell.filled {
  background: var(--accent-blue);
}

/* Utility */
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mt-2 { margin-top: 2rem; }

svg {
  flex-shrink: 0;
}