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

body {
    font-family: 'Roboto', Arial, sans-serif;
    background-color: #2b0000; /* đỏ rượu nền tối */
    color: #f5f5f5;
    line-height: 1.6;
}

/* Header Styles */
header {
    background: linear-gradient(90deg, #a60000, #d40000); /* đỏ gradient */
    color: #FFD700; /* vàng ánh kim */
    padding: 20px;
    text-align: center;
}

header h1 {
    font-size: 32px;
    font-weight: bold;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.5);
}

/* Navigation Bar */
nav {
    display: flex;
    justify-content: center;
    background-color: #3d0000; /* đỏ trầm */
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    padding: 10px 0;
}

nav a {
    color: #FFD700; /* vàng kim */
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #fff;
}

/* Main Content */
main {
    margin: 20px auto;
    max-width: 1200px;
    background-color: #4a0000; /* đỏ nền bài */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    overflow: hidden;
    padding: 20px;
}

main h2 {
    color: #FFD700; /* vàng kim */
    font-size: 24px;
    margin-bottom: 15px;
    text-shadow: 1px 1px 3px #000;
}

main p {
    margin-bottom: 15px;
    color: #fff;
}

/* Button Styles */
button {
    display: inline-block;
    padding: 10px 20px;
    color: #000;
    background: linear-gradient(90deg, #FFD700, #FFB800);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: transform 0.2s ease, background 0.3s ease;
}

button:hover {
    background: linear-gradient(90deg, #FFB800, #FFD700);
    transform: scale(1.05);
}

/* Footer Styles */
footer {
    background-color: #3d0000;
    color: #FFD700;
    text-align: center;
    padding: 15px 0;
    margin-top: 20px;
    border-top: 2px solid #FFD700;
}

footer p {
    font-size: 14px;
}