:root {
    --primary-gradient: linear-gradient(135deg, #0d47a1 0%, #1976d2 100%);
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --accent-orange: #ff9800;
    --accent-magenta: #e91e63;
    --accent-green: #4caf50;
    --text-primary: #1e293b;
    --text-muted: #64748b;
    --border-radius: 16px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding-bottom: 70px; /* Space for bottom navigation */
}

/* Header Banner */
.brand-header {
    background: var(--primary-gradient);
    color: white;
    padding: 20px 15px 30px 15px;
    border-bottom-left-radius: 24px;
    border-bottom-right-radius: 24px;
    box-shadow: 0 4px 15px rgba(13, 71, 161, 0.2);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-title {
    font-size: 1.2rem;
    font-weight: 700;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    margin: -15px 15px 15px 15px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.06);
    border: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 15px;
}

.stat-card {
    background: #ffffff;
    padding: 15px;
    border-radius: 12px;
    border-left: 4px solid var(--accent-orange);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.stat-card.green { border-left-color: var(--accent-green); }
.stat-card.magenta { border-left-color: var(--accent-magenta); }

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Mobile Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
}

.nav-item {
    text-align: center;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.75rem;
}

.nav-item.active {
    color: #1976d2;
    font-weight: bold;
}

.btn-custom {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
}

.btn-orange {
    background: var(--accent-orange);
    color: white;
}