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

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(20, 30, 48, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-primary: #6366f1; /* Indigo */
  --accent-secondary: #a855f7; /* Purple */
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4f46e5 0%, #9333ea 100%);
  --accent-cyan: #06b6d4; /* Cyan */
  --accent-cyan-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.15);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.4);
  
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.15) 0px, transparent 50%);
  background-attachment: fixed;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Typography & Layouts */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition-fast);
}
a:hover {
  filter: brightness(1.2);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseBorder {
  0% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
  70% { box-shadow: 0 0 0 8px rgba(99, 102, 241, 0); }
  100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.fade-in {
  animation: fadeIn var(--transition-normal);
}

/* Main Layout Grid */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: rgba(17, 24, 39, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-gradient);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: white;
  font-size: 1.25rem;
}

.logo-text h1 {
  font-size: 1.25rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text span {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: block;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.system-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  display: inline-block;
}

.status-dot.offline {
  background: var(--danger);
  animation: pulseBorder 1.5s infinite;
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: var(--border-radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
}
.btn-primary:hover {
  background: var(--accent-gradient-hover);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-danger:hover {
  background: var(--danger);
  color: white;
}

.btn-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.btn-success:hover {
  background: var(--success);
  color: white;
}

/* Authentication Views */
.auth-wrapper {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.auth-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 450px;
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.4s ease;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(to right, #fff, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-tabs {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.25rem;
  border-radius: var(--border-radius-sm);
  margin-bottom: 1.5rem;
}

.auth-tab {
  flex: 1;
  text-align: center;
  padding: 0.5rem 0;
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition-fast);
  color: var(--text-secondary);
}

.auth-tab.active {
  background: var(--accent-gradient);
  color: white;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 1rem;
  color: white;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Dashboard Layout */
.dashboard-container {
  flex: 1;
  display: flex;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
  gap: 2rem;
}

aside {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-radius: var(--border-radius-sm);
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.sidebar-link:hover, .sidebar-link.active {
  color: white;
  background: rgba(255, 255, 255, 0.05);
}

.sidebar-link.active {
  background: var(--accent-gradient);
  box-shadow: var(--shadow-sm);
}

main {
  flex: 1;
  min-width: 0;
}

.view-section {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.view-section.active {
  display: block;
}

/* Cards & Grid Widgets */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 120px;
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-gradient);
}

.metric-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.metric-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: white;
  margin-top: 0.5rem;
}

.metric-detail {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Tables */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin-top: 1.5rem;
  box-shadow: var(--shadow-md);
}

.table-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th {
  background: rgba(0, 0, 0, 0.25);
  padding: 1rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
  color: var(--text-primary);
  vertical-align: middle;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Question Bank & Statistics Style */
.question-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.question-stats-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.25rem 0.6rem;
  border-radius: 50px;
}

.stat-val-served { color: var(--accent-cyan); font-weight: 600; }
.stat-val-correct { color: var(--success); font-weight: 600; }
.stat-val-incorrect { color: var(--danger); font-weight: 600; }

/* Modal windows */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(8px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  width: 100%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
  animation: fadeIn var(--transition-normal);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.modal-close:hover {
  color: white;
}

/* Exam Console UI */
.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.exam-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.exam-card.active-exam {
  border-color: rgba(99, 102, 241, 0.4);
}

.exam-time-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Exam Interface (Taking Exam) */
.exam-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2rem;
  height: calc(100vh - 120px);
}

.exam-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 0;
  overflow-y: auto;
}

.exam-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: white;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
  margin-bottom: 0.75rem;
}

.option-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-secondary);
}

.option-btn.selected {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.option-index {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.option-btn.selected .option-index {
  background: var(--accent-gradient);
}

.nav-numbers {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
}

.num-pill {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.num-pill:hover {
  border-color: var(--text-secondary);
}

.num-pill.answered {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

.num-pill.active {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 2px var(--accent-cyan);
}

/* Custom Notifications Banner */
.notify-banner {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-cyan);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  max-width: 350px;
  display: none;
  animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2000;
}

.notify-banner.active {
  display: block;
}

.notify-header {
  font-weight: 700;
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
  color: var(--accent-cyan);
}

.notify-body {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Chart Styles */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

canvas {
  width: 100% !important;
  max-height: 250px;
}

/* Responsive Support styling overrides */
@media (max-width: 992px) {
  .exam-layout {
    grid-template-columns: 1fr;
    height: auto;
  }
  .dashboard-container {
    flex-direction: column;
  }
  aside {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
  .sidebar-link {
    white-space: nowrap;
  }
}

@media (max-width: 600px) {
  header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  .nav-controls {
    width: 100%;
    justify-content: space-between;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}