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

body {
    font-family: 'Roboto', Arial, sans-serif;
    background-color: #0d0f1a; /* tone tối chủ đạo */
    color: #ffffff;
    line-height: 1.6;
}

/* Header Styles */
header {
    background-color: #0d0f1a; 
    color: #ff5aa5; /* chữ hồng giống logo */
    padding: 20px;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 20px;
}

header h1 {
    font-size: 32px;
    font-weight: bold;
}

/* Navigation Bar */
nav {
    display: flex;
    justify-content: center;
    background-color: #0d0f1a; /* giữ đúng tone tối */
    border-bottom: 1px solid #2b2d3a;
    padding: 12px 0;
}

nav a {
    color: #ffffff; /* chữ trắng */
    margin: 0 18px;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #ff5aa5; /* hover hồng */
}

/* Main Content */
main {
    margin: 20px auto;
    max-width: 1200px;
    background-color: #ffffff;
    color: #333;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    overflow: hidden;
    padding: 25px;
}

main h2 {
    color: #ff5aa5;
    font-size: 26px;
    margin-bottom: 15px;
}

/* Buttons */
button {
    padding: 10px 20px;
    color: #fff;
    background-color: #ff5aa5;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: 0.3s;
}

button:hover {
    background-color: #e0448f;
}

/* Footer */
footer {
    background-color: #0d0f1a;
    color: #ff5aa5;
    text-align: center;
    padding: 18px 0;
    margin-top: 30px;
}

footer p {
    font-size: 14px;
}