:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --bg-gradient-start: #f3f4f6;
  --bg-gradient-end: #e5e7eb;
  --text-dark: #1f2937;
  --text-muted: #6b7280;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --error-color: #ef4444;
  --success-color: #10b981;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--text-dark);
}

.center-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  padding: 40px;
  width: 100%;
  max-width: 440px;
  transition: transform 0.3s ease;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  text-align: center;
}

p.subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-dark);
}

input.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.9);
}

input.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

button.btn-primary {
  width: 100%;
  padding: 14px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 10px;
}

button.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
}

.alert {
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  display: none;
}

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

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

/* Dashboard & Admin Layout Specifics */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
}

.topbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-color);
}

.auth-info {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

button.btn-logout {
  background: transparent;
  border: 1px solid var(--text-muted);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

button.btn-logout:hover {
  background: var(--text-muted);
  color: white;
}

.dashboard-container {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
  width: 100%;
}

.actions-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.table-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  overflow: hidden;
  width: 100%;
  border-collapse: collapse;
}

.table-glass th,
.table-glass td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.table-glass th {
  background: rgba(0, 0, 0, 0.02);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
}

.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-pending {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

button.btn-accept {
  background: var(--success-color);
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: opacity 0.2s;
}

button.btn-accept:hover {
  opacity: 0.8;
}

.empty-state {
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
}