frontend/src/index.css

/* ─── Premium Glassmorphism Dark Mode Design System ─── */

:root {
  --bg-primary: #0b0f19;
  --bg-grid: rgba(99, 102, 241, 0.03);
  --card-bg: rgba(17, 24, 39, 0.65);
  --card-border: rgba(255, 255, 255, 0.08);
  
  --primary-gradient: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  --secondary-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent-glow: rgba(99, 102, 241, 0.3);
  --accent-color: #6366f1;
  --focus-ring: 0 0 0 3px rgba(99, 102, 241, 0.4);
  
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
    linear-gradient(to right, var(--bg-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--bg-grid) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

#root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  flex: 1;
}

::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #1f2937;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #374151;
}

.page-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.5rem;
}

.navbar {
  background: rgba(11, 15, 25, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-smooth);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: var(--accent-color);
  background: rgba(99, 102, 241, 0.1);
}

.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 460px;
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  animation: fadeIn 0.4s ease-out;
}

.glass-card.wide {
  max-width: 800px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h1, h2, h3 {
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.8rem;
  background: linear-gradient(to right, #ffffff, #d1d5db);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.card-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: -1rem;
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

input {
  background: rgba(31, 41, 55, 0.5);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 0.8rem 1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  width: 100%;
}

input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: var(--focus-ring);
  background: rgba(31, 41, 55, 0.8);
}

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

.btn {
  background: var(--primary-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.5rem;
  transition: var(--transition-smooth);
  width: 100%;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
  gap: 8px;
}

.btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
  filter: brightness(1.1);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  box-shadow: none;
}

.btn.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.15);
  box-shadow: none;
}

.btn.btn-danger {
  background: var(--danger-gradient);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.25);
}

.btn.btn-danger:hover:not(:disabled) {
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.btn-group {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: shake 0.4s ease-out;
}

.alert-error {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.alert-success {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #a7f3d0;
}

.alert-info {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #93c5fd;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.footer-text {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 1.5rem;
}

.footer-text a {
  color: #8b5cf6;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.footer-text a:hover {
  text-decoration: underline;
  color: #a78bfa;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 2fr 1fr;
  }
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.info-table tr {
  border-bottom: 1px solid var(--card-border);
}

.info-table tr:last-child {
  border-bottom: none;
}

.info-table td {
  padding: 0.9rem 0;
  font-size: 0.95rem;
}

.info-table td.label {
  font-weight: 600;
  color: var(--text-secondary);
  width: 35%;
}

.info-table td.value {
  color: var(--text-primary);
  word-break: break-all;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-badge.active {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.users-list {
  max-height: 250px;
  overflow-y: auto;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-right: 5px;
}

.user-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.user-item-info {
  display: flex;
  flex-direction: column;
}

.user-item-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.user-item-email {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.otp-container {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 1.5rem 0;
}

.otp-box {
  width: 48px;
  height: 48px;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  background: rgba(31, 41, 55, 0.6);
}

.simulation-log-box {
  margin-top: 1.5rem;
  background: #090d16;
  border: 1px dashed rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: 'Courier New', Courier, monospace;
}

.simulation-log-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: #818cf8;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.simulation-log-content {
  font-size: 0.85rem;
  color: #a7f3d0;
  white-space: pre-wrap;
  word-break: break-all;
}