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

:root {
    --primary-blue: #1a3a52;
    --primary-dark: #0d1f2d;
    --accent-red: #d32f2f;
    --accent-dark-red: #b71c1c;
    --light-gray: #f5f5f5;
    --white: #ffffff;
    --text-dark: #333333;
    --text-light: #666666;
    --border-color: #dddddd;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    position: relative;
    z-index: 0;
}

body.sidebar-open {
    overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

a {
    color: var(--accent-red);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-dark-red);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-light {
    color: var(--text-light);
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mt-4 { margin-top: 4rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }
.mb-4 { margin-bottom: 4rem; }

.py-3 { padding: 3rem 0; }
.py-4 { padding: 4rem 0; }