:root {
    --primary: #f59e0b;
    --dark: #1f2937;
}

body {
    background-color: #f3f4f6;
    min-height: 100vh;
}

.navbar-brand {
    font-weight: 600;
}

.card {
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: transform 0.15s ease;
}

.card:hover {
    transform: translateY(-2px);
}

.stat-card {
    border-left: 4px solid var(--primary);
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

.stat-card .stat-label {
    color: #6b7280;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    color: var(--primary);
    opacity: 0.8;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.login-card .logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-card .logo i {
    font-size: 3rem;
    color: var(--primary);
}

.table-img-thumb {
    width: 40px;
    height: 40px;
    object-fit: contain;
    background: #f9fafb;
    border-radius: 4px;
}

.badge-tier {
    font-size: 0.7rem;
}

.tier-1 { background-color: #10b981; }
.tier-2 { background-color: #3b82f6; }
.tier-3 { background-color: #8b5cf6; }
.tier-4 { background-color: #6b7280; }

.page-header {
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark);
    margin: 0;
}

.chart-container {
    position: relative;
    height: 300px;
}