:root, [data-theme="black"] {
    --primary-color: #111827;
    --primary-color-dark: #1f2937;
    --topbar-bg: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-color-dark) 100%);
    --sidebar-bg: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-color-dark) 100%);
    --bg-primary: #f5f7fb;
    --bg-card: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #666666;
    --border-color: #e0e6ed;
    --card-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

[data-theme="indigo"] {
    --primary-color: #1a237e;
    --primary-color-dark: #283593;
    --topbar-bg: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-color-dark) 100%);
    --sidebar-bg: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-color-dark) 100%);
    --bg-primary: #f5f7fb;
    --bg-card: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #666666;
    --border-color: #e0e6ed;
    --card-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

body {
    background-color: var(--bg-primary);
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
}

.container-fluid {
    padding: 0;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.header {
    background: var(--topbar-bg);
    color: white;
    padding: 1.2rem;
    margin-bottom: 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
}