:root {
    --primary-color: #2c3e50;
    --primary-light: #34495e;
    --primary-dark: #1a252f;
    --accent-color: #e74c3c;
    --accent-light: #ec7063;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --danger-color: #e74c3c;
    --sidebar-width: 220px;
    --header-height: 52px;
    --background-color: #f0f2f5;
    --card-bg: #ffffff;
    --sidebar-bg: #2c3e50;
    --text-color: #2c3e50;
    --text-light: #7f8c8d;
    --text-white: #ffffff;
    --border-color: #dee2e6;
    --white: #ffffff;
    --shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 5px 25px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    overflow-x: hidden;
}

.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}