/* InGen Analytics — Premium Dashboard Styles */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --primary: #0f172a;
  --primary-mid: #1e293b;
  --primary-light: #334155;
  --accent: #10b981;
  --accent-hover: #059669;
  --accent-glow: rgba(16, 185, 129, 0.15);
  --blue: #3b82f6;
  --blue-soft: #60a5fa;
  --green: #10b981;
  --amber: #f59e0b;
  --red: #ef4444;
  --purple: #8b5cf6;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==================== LAYOUT ==================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* ==================== HEADER ==================== */

.header {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  color: white;
  padding: 0;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(16, 185, 129, 0.3), transparent);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  padding-bottom: 20px;
  position: relative;
  z-index: 1;
}

.header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header .course-info {
  font-size: 0.85rem;
  opacity: 0.7;
  font-weight: 400;
  text-align: right;
  line-height: 1.5;
}

.header .course-info a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-size: 0.8rem;
  transition: var(--transition);
}

.header .course-info a:hover {
  color: var(--accent);
}

/* ==================== CARDS ==================== */

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 24px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card h2 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

/* ==================== SCORE CARDS ==================== */

.score-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.score-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 20px;
  text-align: center;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.score-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-light);
  opacity: 0.5;
}

.score-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.score-card .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 600;
}

.score-card .score {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
}

.score-card .score.excellent { color: var(--green); }
.score-card .score.good { color: var(--blue); }
.score-card .score.average { color: var(--amber); }
.score-card .score.below { color: var(--red); }

/* ==================== TABLES ==================== */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th {
  background: var(--primary);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

th.sortable { cursor: pointer; user-select: none; }
th.sortable:hover { background: var(--primary-mid); }

th:first-child { border-radius: var(--radius-sm) 0 0 0; }
th:last-child { border-radius: 0 var(--radius-sm) 0 0; }

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
}

tr:last-child td { border-bottom: none; }

tr:hover td { background: #f8fafc; }

.outlier-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: white;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ==================== BUTTONS ==================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
  letter-spacing: -0.01em;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.2);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-mid) 0%, #475569 100%);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.25);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: white;
  box-shadow: 0 1px 3px rgba(16, 185, 129, 0.25);
}
.btn-success:hover {
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
  box-shadow: 0 1px 3px rgba(239, 68, 68, 0.25);
}
.btn-danger:hover {
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
  border-radius: 6px;
}

/* ==================== FORMS ==================== */

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  color: var(--text);
  background: white;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-row {
  display: flex;
  gap: 16px;
  align-items: flex-end;
}

.form-row .form-group { flex: 1; }

/* ==================== ACTIONS BAR ==================== */

.actions-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 20px;
}

/* ==================== STATUS MESSAGES ==================== */

.status {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 0.875rem;
  font-weight: 500;
  animation: statusIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes statusIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.status.success {
  background: linear-gradient(135deg, #ecfdf5, #d1fae5);
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.status.error {
  background: linear-gradient(135deg, #fef2f2, #fee2e2);
  border: 1px solid #fecaca;
  color: #991b1b;
}

.status.info {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid #bfdbfe;
  color: #1e40af;
}

/* ==================== CHART ==================== */

.chart-container {
  position: relative;
  height: 320px;
  margin: 16px 0 8px;
}

/* ==================== LOGIN ==================== */

.login-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.login-overlay::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.login-box {
  background: white;
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  max-width: 420px;
  width: 90%;
  box-shadow: var(--shadow-xl), 0 0 60px rgba(0,0,0,0.15);
  text-align: center;
  position: relative;
  z-index: 1;
  animation: loginIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes loginIn {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-box h2 {
  color: var(--primary);
  margin-bottom: 4px;
  border: none;
  padding: 0;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-transform: none;
}

.login-box p {
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 0.9rem;
}

.login-box .form-group { margin-bottom: 14px; }
.login-box .form-group label { text-align: left; }

.login-box .form-group input {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}

.login-box .btn {
  padding: 12px 20px;
  font-size: 0.95rem;
  margin-top: 8px;
}

/* ==================== WEEK SELECTOR ==================== */

.week-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.week-btn {
  padding: 8px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: white;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.week-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.2);
}

.week-btn:hover:not(.active) {
  border-color: var(--blue);
  color: var(--blue);
  background: #f0f7ff;
}

/* ==================== ADMIN ITEM ROWS ==================== */

.item-row {
  padding: 16px 18px;
  background: white;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  transition: var(--transition);
}

.item-row:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.item-row .actions { float: right; }
.item-row .actions button { margin-left: 6px; }

.edit-form {
  display: none;
  padding: 16px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  margin-top: 12px;
  border: 1px solid var(--border-light);
}

.edit-form.active { display: block; }

details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--blue);
  padding: 8px 0;
  transition: var(--transition);
}

details summary:hover { color: var(--primary); }

/* ==================== EXPAND ROWS (Professor) ==================== */

.expand-row { display: none; }
.expand-row.active { display: table-row; }
.expand-row td {
  padding: 0 !important;
  background: transparent !important;
}

.expand-content {
  padding: 20px 24px;
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border-top: 1px solid var(--border-light);
  animation: expandIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes expandIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.var-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.var-category {
  background: white;
  border-radius: var(--radius-sm);
  padding: 14px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.var-category h4 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 2px solid;
  font-weight: 700;
}

.var-category h4.awareness { color: var(--blue); border-color: var(--blue); }
.var-category h4.acquisition { color: var(--green); border-color: var(--green); }
.var-category h4.engagement { color: var(--amber); border-color: var(--amber); }
.var-category h4.retention { color: var(--red); border-color: var(--red); }

.var-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  padding: 4px 0;
}

.var-item .val { font-weight: 700; }
.var-item .val.high { color: var(--green); }
.var-item .val.mid { color: var(--text); }
.var-item .val.low { color: var(--red); }

.clickable-row {
  cursor: pointer;
  transition: var(--transition);
}

.clickable-row:hover td {
  background: #f0f7ff !important;
}

/* ==================== STUDENT DASHBOARD ==================== */

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.metric-category {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.metric-category:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.metric-category .cat-header {
  padding: 12px 16px;
  font-weight: 700;
  font-size: 0.75rem;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metric-category .cat-header.awareness { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.metric-category .cat-header.acquisition { background: linear-gradient(135deg, #10b981, #059669); }
.metric-category .cat-header.engagement { background: linear-gradient(135deg, #f59e0b, #d97706); }
.metric-category .cat-header.retention { background: linear-gradient(135deg, #ef4444, #dc2626); }

.metric-category .cat-avg {
  padding: 14px 16px;
  font-size: 1.8rem;
  font-weight: 800;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
  letter-spacing: -0.03em;
}

.metric-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.82rem;
}

.metric-item:last-child { border-bottom: none; }
.metric-item .name { color: var(--text-secondary); }
.metric-item .val { font-weight: 700; }
.metric-item .val.high { color: var(--green); }
.metric-item .val.avg { color: var(--text); }
.metric-item .val.low { color: var(--red); }

/* ==================== ENROLLMENT CODE BADGE ==================== */

code {
  background: var(--bg);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.82rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* ==================== RESPONSIVE ==================== */

@media (max-width: 900px) {
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .var-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container { padding: 16px; }
  
  .header .container {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
  
  .header .course-info { text-align: center; }
  
  .score-cards { grid-template-columns: repeat(2, 1fr); }
  .form-row { flex-direction: column; gap: 0; }
  
  .card { padding: 20px; margin-bottom: 16px; }
  
  .actions-bar { flex-direction: column; }
  .actions-bar .btn { width: 100%; }
  
  .table-wrapper { margin: 0 -20px; border-radius: 0; border-left: none; border-right: none; }
  
  th, td { padding: 10px 12px; font-size: 0.8rem; }
}

@media (max-width: 500px) {
  .metric-grid { grid-template-columns: 1fr; }
  .var-grid { grid-template-columns: 1fr; }
  .score-cards { grid-template-columns: 1fr; }
  .week-selector { gap: 6px; }
  .week-btn { padding: 8px 14px; font-size: 0.8rem; }
}

/* ==================== SCROLLBAR ==================== */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ==================== SELECTION ==================== */

::selection {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary);
}