:root {
  --bg-color: #0f172a;
  --surface-color: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --error-color: #ef4444;
  --success-color: #10b981;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: radial-gradient(circle at top right, rgba(59, 130, 246, 0.15), transparent 40%),
                    radial-gradient(circle at bottom left, rgba(139, 92, 246, 0.15), transparent 40%);
  padding: 2rem;
}

.container {
  width: 100%;
  max-width: 480px;
}

.glass-panel {
  background: var(--surface-color);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 3rem 2.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transform: translateY(0);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel:hover {
  transform: translateY(-2px);
  box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.6);
}

.header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header p {
  color: var(--text-muted);
  font-size: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
  position: relative;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  transition: color 0.2s ease;
}

.form-group input:focus + label {
  color: var(--primary-color);
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-main);
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.2s ease;
  outline: none;
}

.form-control::placeholder {
  color: rgba(148, 163, 184, 0.4);
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  background: rgba(15, 23, 42, 0.8);
}

.btn {
  width: 100%;
  padding: 1rem;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Spinner for loading state */
.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
  display: none;
}

.btn.loading .spinner {
  display: block;
}

.btn.loading .btn-text {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.message {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 12px;
  font-size: 0.875rem;
  text-align: center;
  display: none;
  animation: fadeIn 0.3s ease;
}

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

.message.success {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.message.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Table styles for admin */
.admin-table-container {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 2rem;
}

.admin-table th,
.admin-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

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

.admin-table tbody tr {
  transition: background-color 0.2s ease;
}

.admin-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}