:root {
    --primary-color: #FF4500;
    --secondary-color: #FFD700;
    --text-color: #333333;
    --bg-color: #ffffff;
    --light-bg: #f8f9fa;
    --border-color: #dddddd;
    --font-main: system-ui, -apple-system, Roboto, Inter, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    background-image: url('../img/pattern.svg');
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--primary-color);
}

section {
    padding: 80px 0;
}

.hero {
    background: var(--light-bg);
    text-align: center;
    padding-top: 140px;
}

.hero img {
    max-width: 100%;
    height: auto;
}

.alert-box {
    background: #fffbe6;
    border-left: 8px solid #ffe58f;
    padding: 20px;
    margin: 40px 0;
}

footer {
    background: #333;
    color: #fff;
    padding: 40px 0;
    margin-top: 40px;
}

.footer-info {
    font-size: 0.8rem;
    line-height: 1.4;
    opacity: 0.5;
    text-align: center;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    nav ul {
        margin-top: 15px;
    }
}