:root {
    --primary-color: #26A9E0;
    --secondary-color: #FFFFFF;
    --text-dark: #333333;
    --text-light: #ffffff;
    --background-light: #f9f9f9;
    --background-dark: #26A9E0; /* Using primary color for dark sections */
    --border-color: #e0e0e0;
    --login-color: #EA7C07; /* Custom color for login/action */
}

/* Base styles for the page content */
.page-register {
    font-family: 'Arial', sans-serif;
    color: var(--text-dark);
    background-color: var(--secondary-color); /* Default white background */
    line-height: 1.6;
}

/* Header Offset */
.page-register__hero-section {
    padding-top: var(--header-offset, 120px); /* Desktop default, controlled by shared */
}

/* General container for content sections */
.page-register__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    box-sizing: border-box;
}

.page-register__section-title {
    font-size: 36px;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
}

.page-register__section-description {
    font-size: 18px;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* HERO Section */
.page-register__hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-bottom: 60px; /* Adjusted padding-bottom */
    background: linear-gradient(135deg, var(--primary-color), #4CAF50); /* Gradient for visual appeal */
    color: var(--text-light);
}

.page-register__hero-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.page-register__hero-image {
    width: 100%;
    margin-bottom: 30px;
    max-width: 1000px; /* Constrain hero image width */
}

.page-register__hero-image img {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.page-register__hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    width: 100%;
    max-width: 900px;
}

.page-register__main-title {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--text-light);
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.page-register__intro-text {
    font-size: 20px;
    margin-bottom: 30px;
    color: var(--text-light);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.page-register__cta-button {
    display: inline-block;
    padding: 18px 45px;
    background: var(--login-color); /* Custom login color */
    color: var(--text-light);
    text-decoration: none;
    border-radius: 8px;
    font-size: 22px;
    font-weight: bold;
    margin-top: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
}

.page-register__cta-button:hover {
    background: #c76b06; /* Darken on hover */
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* Registration Steps Section */
.page-register__registration-steps {
    padding: 80px 0;
    background-color: var(--background-light);
}

.page-register__steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.page-register__step-item {
    background: var(--secondary-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-register__step-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-register__step-title {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 700;
}

.page-register__step-item p {
    font-size: 16px;
    color: var(--text-dark);
}

.page-register__security-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-top: 40px;
    margin-bottom: 60px;
}

.page-register__security-info img {
    max-width: 600px;
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.page-register__security-text {
    font-size: 18px;
    color: var(--text-dark);
    text-align: center;
    max-width: 800px;
}

.page-register__btn-primary {
    display: block;
    width: fit-content;
    margin: 0 auto;
    padding: 15px 35px;
    background: var(--primary-color);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.page-register__btn-primary:hover {
    background: #1e87b7; /* Darken on hover */
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Benefits Section */
.page-register__benefits {
    padding: 80px 0;
    background-color: var(--background-dark);
    color: var(--text-light);
}

.page-register__benefits .page-register__section-title {
    color: var(--text-light);
}

.page-register__benefits .page-register__section-description {
    color: var(--text-light);
}

.page-register__benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.page-register__benefit-item {
    background: rgba(255, 255, 255, 0.15); /* Slightly transparent white */
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease;
}

.page-register__benefit-item:hover {
    background: rgba(255, 255, 255, 0.25);
}

.page-register__benefit-title {
    font-size: 22px;
    color: var(--text-light);
    margin-bottom: 15px;
    font-weight: 700;
}

.page-register__benefit-item p {
    font-size: 16px;
    color: var(--text-light);
}

.page-register__benefits img {
    max-width: 800px;
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 10px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

/* Promotions Section */
.page-register__promotions {
    padding: 80px 0;
    background-color: var(--background-light);
}

.page-register__promo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.page-register__promo-item {
    background: var(--secondary-color);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-register__promo-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.page-register__promo-item img {
    width: 100%;
    height: auto;
    max-width: 100%;
    border-radius: 8px;
    margin-bottom: 20px;
    object-fit: cover;
}

.page-register__promo-title {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.page-register__promo-item p {
    font-size: 16px;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.page-register__btn-secondary {
    display: inline-block;
    padding: 12px 25px;
    background: var(--secondary-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    cursor: pointer;
}

.page-register__btn-secondary:hover {
    background: var(--primary-color);
    color: var(--text-light);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.page-register__promo-footer-text {
    font-size: 16px;
    text-align: center;
    color: var(--text-dark);
    margin-top: 40px;
}

/* FAQ Section */
.page-register__faq-section {
    padding: 80px 0;
    background-color: var(--background-dark);
    color: var(--text-light);
}

.page-register__faq-section .page-register__section-title {
    color: var(--text-light);
}

.page-register__faq-list {
    max-width: 900px;
    margin: 0 auto;
}

/* FAQ容器样式 */
.page-register__faq-item {
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* FAQ默认状态 - 答案隐藏 */
.page-register__faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
    padding: 0 20px;
    opacity: 0;
}

/* FAQ展开状态 - ⚠️ Sử dụng!important và đủ lớn max-height để đảm bảo có thể mở rộng */
.page-register__faq-item.active .page-register__faq-answer {
    max-height: 2000px !important; /* ⚠️ Sử dụng!important để đảm bảo ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
    padding: 20px !important;
    opacity: 1;
    background: rgba(255, 255, 255, 0.9); /* Lighter background for answer */
    color: var(--text-dark);
    border-radius: 0 0 8px 8px;
}

/* Vấn đề kiểu dáng */
.page-register__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    background: var(--secondary-color); /* White background for question */
    color: var(--text-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    position: relative;
}

.page-register__faq-question:hover {
    background: var(--background-light);
    border-color: #c4c4c4; /* Darken on hover */
}

.page-register__faq-question:active {
    background: #eeeeee;
}

/* Tiêu đề câu hỏi kiểu dáng */
.page-register__faq-question h3 {
    margin: 0;
    padding: 0;
    flex: 1;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.5;
    pointer-events: none; /* Ngăn thẻ h3 chặn sự kiện click */
    color: var(--primary-color);
}

/* Biểu tượng chuyển đổi */
.page-register__faq-toggle {
    font-size: 28px;
    font-weight: bold;
    line-height: 1;
    color: var(--primary-color);
    transition: transform 0.3s ease, color 0.3s ease;
    flex-shrink: 0;
    margin-left: 15px;
    pointer-events: none; /* Ngăn biểu tượng chặn sự kiện click */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.page-register__faq-item.active .page-register__faq-toggle {
    color: var(--login-color); /* Change color when active */
    transform: rotate(45deg); /* Rotate for minus sign effect */
}


/* Final CTA Section */
.page-register__cta-final {
    padding: 80px 0;
    background-color: var(--background-light);
    text-align: center;
}

.page-register__final-cta {
    margin-right: 20px;
    margin-bottom: 20px; /* For mobile stacking */
}

.page-register__download-app-btn {
    margin-top: 20px; /* Space from first button */
}

/* Responsive Design */
@media (max-width: 1024px) {
    .page-register__container {
        padding: 30px 15px;
    }
    .page-register__hero-image img {
        border-radius: 8px;
    }
    .page-register__main-title {
        font-size: 42px;
    }
    .page-register__intro-text {
        font-size: 18px;
    }
    .page-register__cta-button {
        padding: 15px 35px;
        font-size: 20px;
    }
    .page-register__section-title {
        font-size: 32px;
    }
    .page-register__section-description {
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    /* Mobile header offset */
    .page-register__hero-section {
        padding-top: var(--header-offset, 120px) !important; /* Mobile default, controlled by shared */
        padding-bottom: 40px;
        padding-left: 15px;
        padding-right: 15px;
    }

    .page-register__main-title {
        font-size: 32px;
        margin-bottom: 15px;
    }
    .page-register__intro-text {
        font-size: 16px;
        margin-bottom: 20px;
    }
    .page-register__cta-button {
        padding: 12px 30px;
        font-size: 18px;
        width: 100% !important; /* Mobile button full width */
        max-width: 300px !important; /* Max width for mobile buttons */
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }

    .page-register__section-title {
        font-size: 28px;
        margin-bottom: 15px;
    }
    .page-register__section-description {
        font-size: 15px;
        margin-bottom: 30px;
    }

    .page-register__steps-grid,
    .page-register__benefits-grid,
    .page-register__promo-grid {
        grid-template-columns: 1fr;
    }

    .page-register__security-info {
        gap: 20px;
    }

    .page-register__btn-primary,
    .page-register__btn-secondary {
        width: 100% !important;
        max-width: 300px !important;
        margin-left: auto !important;
        margin-right: auto !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px !important;
        padding-right: 15px !important;
        margin-bottom: 15px;
    }
    
    .page-register__btn-secondary.page-register__download-app-btn {
        margin-top: 0; /* Remove extra margin on mobile */
    }

    .page-register__cta-final .page-register__cta-button,
    .page-register__cta-final .page-register__btn-secondary {
        display: block;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 15px;
    }
    .page-register__cta-final .page-register__final-cta {
        margin-right: auto; /* Ensure centering */
    }

    .page-register__faq-question {
        padding: 15px 20px;
    }
    .page-register__faq-question h3 {
        font-size: 16px;
    }
    .page-register__faq-toggle {
        font-size: 24px;
        width: 28px;
        height: 28px;
    }
    .page-register__faq-item.active .page-register__faq-answer {
        padding: 15px !important;
    }

    /* All images responsive */
    .page-register img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
    }
    
    /* All content containers responsive */
    .page-register__section,
    .page-register__card,
    .page-register__container,
    .page-register__hero-container,
    .page-register__registration-steps,
    .page-register__benefits,
    .page-register__promotions,
    .page-register__faq-section,
    .page-register__cta-final,
    .page-register__step-item,
    .page-register__benefit-item,
    .page-register__promo-item {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-register__hero-section {
        padding-left: 0;
        padding-right: 0;
    }
}

/* Ensure no filter on images */
.page-register img {
    filter: none !important;
}

/* Color contrast adjustments */
.page-register__dark-section {
    background: var(--background-dark);
    color: var(--text-light);
}

.page-register__light-bg {
    background: var(--background-light);
    color: var(--text-dark);
}

.page-register__faq-question {
    background: var(--secondary-color);
    color: var(--primary-color); /* Question text in primary color */
}

.page-register__faq-item.active .page-register__faq-answer {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
}