:root {
    --color-primary: #11A84E;
    --color-secondary: #22C768;
    --color-button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
    --color-card-bg: #11271B;
    --color-background: #08160F;
    --color-text-main: #F2FFF6;
    --color-text-secondary: #A7D9B8;
    --color-border: #2E7A4E;
    --color-glow: #57E38D;
    --color-gold: #F2C14E;
    --color-divider: #1E3A2A;
    --color-deep-green: #0A4B2C;
}

.page-register {
    font-family: 'Arial', sans-serif;
    color: var(--color-text-main); /* Light text on dark background */
    background-color: var(--color-background); /* Dark background */
    line-height: 1.6;
}

.page-register__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.page-register__section-title {
    font-size: 2.5em;
    color: var(--color-gold);
    text-align: center;
    margin-bottom: 40px;
    font-weight: bold;
}

.page-register__text-block {
    font-size: 1.1em;
    margin-bottom: 20px;
    color: var(--color-text-secondary);
    text-align: justify;
}

/* Hero Section */
.page-register__hero-section {
    position: relative;
    display: flex;
    flex-direction: column; /* Image first, then content */
    align-items: center;
    justify-content: center;
    padding: 10px 0 60px 0; /* Small top padding, then larger bottom */
    background-color: var(--color-deep-green); /* Fallback background for hero */
}

.page-register__hero-image-wrapper {
    width: 100%;
    max-height: 600px; /* Limit image height */
    overflow: hidden;
    margin-bottom: 30px; /* Space between image and text content */
}

.page-register__hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.page-register__hero-content {
    text-align: center;
    max-width: 800px;
    padding: 0 20px;
}

.page-register__hero-title {
    color: var(--color-gold);
    font-size: clamp(2.5em, 5vw, 3.5em); /* Responsive font size for H1 */
    margin-bottom: 15px;
    line-height: 1.2;
    font-weight: bold;
}

.page-register__hero-description {
    color: var(--color-text-main);
    font-size: 1.2em;
    margin-bottom: 30px;
}

/* CTA Button */
.page-register__cta-button {
    display: inline-block;
    background: var(--color-button-gradient);
    color: var(--color-text-main); /* White text on button */
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1em;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
}

.page-register__cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-register__cta-button--centered {
    display: block;
    margin: 30px auto 0 auto;
    width: fit-content;
}

.page-register__cta-button--large {
    padding: 18px 40px;
    font-size: 1.3em;
}

/* Introduction Section */
.page-register__introduction-section,
.page-register__why-choose-section,
.page-register__how-to-register-section,
.page-register__verification-section,
.page-register__promotions-section,
.page-register__security-section,
.page-register__support-section,
.page-register__faq-section,
.page-register__conclusion-section {
    padding: 80px 0;
    background-color: var(--color-background); /* Consistent dark background */
}

/* Features Grid */
.page-register__features-grid,
.page-register__promotions-grid,
.page-register__support-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.page-register__card {
    background-color: var(--color-card-bg); /* Darker green background for cards */
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    text-align: center;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    color: var(--color-text-main); /* Light text on card */
}

.page-register__card-image {
    width: 100%;
    height: 200px; /* Fixed height for consistency */
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block;
}

.page-register__card-title {
    font-size: 1.5em;
    color: var(--color-gold);
    margin-bottom: 15px;
    font-weight: bold;
}

.page-register__card-text {
    font-size: 1em;
    color: var(--color-text-secondary);
    flex-grow: 1; /* Make text blocks take available space */
}

/* Registration Steps */
.page-register__registration-steps {
    list-style: none;
    counter-reset: step-counter;
    padding: 0;
}

.page-register__step-item {
    background-color: var(--color-card-bg);
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    position: relative;
    border: 1px solid var(--color-border);
}

.page-register__step-item::before {
    counter-increment: step-counter;
    content: "Bước " counter(step-counter);
    position: absolute;
    top: -15px;
    left: 20px;
    background-color: var(--color-primary);
    color: var(--color-text-main);
    padding: 5px 15px;
    border-radius: 5px;
    font-weight: bold;
    font-size: 0.9em;
}

.page-register__step-title {
    font-size: 1.4em;
    color: var(--color-gold);
    margin-top: 10px;
    margin-bottom: 15px;
    font-weight: bold;
}

.page-register__step-description,
.page-register__info-list {
    color: var(--color-text-secondary);
    margin-bottom: 10px;
}

.page-register__info-list {
    list-style: disc;
    margin-left: 20px;
    color: var(--color-text-secondary);
}

.page-register__info-list li {
    margin-bottom: 5px;
}

/* Verification Section */
.page-register__verification-list,
.page-register__security-features {
    list-style: none;
    padding: 0;
    margin-top: 40px;
}

.page-register__verification-item,
.page-register__security-item {
    background-color: var(--color-card-bg);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    border: 1px solid var(--color-border);
}

.page-register__verification-title,
.page-register__security-title {
    font-size: 1.3em;
    color: var(--color-gold);
    margin-bottom: 10px;
    font-weight: bold;
}

.page-register__verification-description,
.page-register__security-description {
    color: var(--color-text-secondary);
}

/* FAQ Section */
.page-register__faq-list {
    margin-top: 40px;
}

.page-register__faq-item {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    margin-bottom: 15px;
    overflow: hidden;
}

.page-register__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    cursor: pointer;
    font-size: 1.2em;
    color: var(--color-text-main);
    background-color: var(--color-deep-green); /* Slightly different background for question */
    border-bottom: 1px solid var(--color-divider);
    list-style: none; /* For details/summary */
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.page-register__faq-item summary::-webkit-details-marker {
    display: none;
}
.page-register__faq-item summary::marker {
    display: none;
}

.page-register__faq-qtext {
    font-weight: bold;
    flex-grow: 1;
}

.page-register__faq-toggle {
    font-size: 1.5em;
    margin-left: 15px;
    color: var(--color-gold);
}

.page-register__faq-item[open] .page-register__faq-question {
    border-bottom: none;
}

.page-register__faq-answer {
    padding: 0 20px 20px 20px;
    font-size: 1em;
    color: var(--color-text-secondary);
}

.page-register__faq-answer p {
    margin: 0;
    padding-top: 15px;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .page-register__section-title {
        font-size: 2em;
    }
    .page-register__hero-title {
        font-size: clamp(2em, 4vw, 3em);
    }
    .page-register__hero-description {
        font-size: 1.1em;
    }
    .page-register__card-title {
        font-size: 1.3em;
    }
    .page-register__step-title {
        font-size: 1.2em;
    }
}

@media (max-width: 768px) {
    .page-register__hero-section {
        padding-bottom: 40px;
    }
    .page-register__hero-image-wrapper {
        margin-bottom: 20px;
    }
    .page-register__hero-title {
        font-size: clamp(1.8em, 6vw, 2.5em) !important;
        margin-bottom: 10px;
    }
    .page-register__hero-description {
        font-size: 1em !important;
        margin-bottom: 20px;
    }
    .page-register__cta-button {
        padding: 12px 25px !important;
        font-size: 1em !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }
    .page-register__cta-button--centered {
        width: 100% !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-register__cta-button--large {
        padding: 15px 30px !important;
        font-size: 1.1em !important;
    }

    .page-register__section-title {
        font-size: 1.8em !important;
        margin-bottom: 30px !important;
    }
    .page-register__text-block {
        font-size: 0.95em !important;
    }

    .page-register__features-grid,
    .page-register__promotions-grid,
    .page-register__support-methods {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }

    .page-register__card {
        padding: 20px !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .page-register__card-image {
        height: 150px !important;
    }

    .page-register__card-title {
        font-size: 1.2em !important;
    }

    .page-register__step-item {
        padding: 25px !important;
    }

    .page-register__step-title {
        font-size: 1.1em !important;
    }

    .page-register__verification-item,
    .page-register__security-item {
        padding: 20px !important;
    }

    .page-register__verification-title,
    .page-register__security-title {
        font-size: 1.1em !important;
    }

    .page-register__faq-question {
        font-size: 1.1em !important;
        padding: 15px !important;
    }
    .page-register__faq-answer {
        padding: 0 15px 15px 15px !important;
    }

    /* Image responsive */
    .page-register img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-register__section,
    .page-register__card,
    .page-register__container,
    .page-register__hero-image-wrapper {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }

    .page-register__hero-section {
        padding-top: 10px !important; /* body already handles --header-offset */
        padding-left: 0 !important;
        padding-right: 0 !important;
    }
    .page-register__hero-content {
        padding-left: 15px !important;
        padding-right: 15px !important;
    }
}