/* Base styles for the page-khuyen-mai */
.page-khuyen-mai {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333333; /* Default dark text for light body background */
    background-color: #FFFFFF; /* Default body background */
}

/* Container for general content */
.page-khuyen-mai__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 15px;
    box-sizing: border-box;
}

/* Section titles */
.page-khuyen-mai__section-title {
    font-size: 2.5em;
    font-weight: bold;
    color: #017439;
    text-align: center;
    margin-bottom: 20px;
    line-height: 1.2;
}

/* Section descriptions */
.page-khuyen-mai__section-description {
    font-size: 1.1em;
    text-align: center;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.page-khuyen-mai__btn-primary,
.page-khuyen-mai__btn-secondary {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    text-align: center;
    max-width: 100%;
    box-sizing: border-box;
    white-space: normal;
    word-wrap: break-word;
}

.page-khuyen-mai__btn-primary {
    background-color: #017439;
    color: #FFFFFF;
    border: 2px solid #017439;
}

.page-khuyen-mai__btn-primary:hover {
    background-color: #005a2e;
    border-color: #005a2e;
}

.page-khuyen-mai__btn-secondary {
    background-color: #FFFFFF;
    color: #017439;
    border: 2px solid #017439;
}

.page-khuyen-mai__btn-secondary:hover {
    background-color: #f0f0f0;
    color: #005a2e;
    border-color: #005a2e;
}

/* Specific button colors for register/login */
.page-khuyen-mai__btn-register {
    background-color: #C30808;
    color: #FFFF00;
    border-color: #C30808;
}
.page-khuyen-mai__btn-register:hover {
    background-color: #a00606;
    border-color: #a00606;
}
.page-khuyen-mai__btn-download {
    background-color: #C30808;
    color: #FFFF00;
    border-color: #C30808;
}
.page-khuyen-mai__btn-download:hover {
    background-color: #a00606;
    border-color: #a00606;
}

/* Hero Section */
.page-khuyen-mai__hero-section {
    position: relative;
    padding-top: 10px; /* As per fixed header rule */
    text-align: center;
    overflow: hidden;
}

.page-khuyen-mai__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    max-height: 675px; /* Max height for hero image */
}

.page-khuyen-mai__hero-content {
    padding: 40px 15px;
    max-width: 900px;
    margin: 0 auto;
    background-color: rgba(255, 255, 255, 0.9); /* Slightly transparent white background for text */
    border-radius: 10px;
    margin-top: -80px; /* Overlap with image slightly for visual effect */
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.page-khuyen-mai__main-title {
    font-size: clamp(2em, 4vw, 3.5em); /* Responsive H1 font size */
    color: #017439;
    margin-bottom: 15px;
    font-weight: 800;
    line-height: 1.1;
}

.page-khuyen-mai__description {
    font-size: 1.2em;
    color: #333333;
    margin-bottom: 30px;
    line-height: 1.5;
}