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

/* body đã padding-top: var(--header-offset)；trang này cấm viết lại biến đó */
.page-contact {
    font-family: 'Arial', sans-serif;
    color: var(--text-main); /* Sử dụng màu chữ chính cho nền tối */
    background-color: var(--bg-color);
    line-height: 1.6;
}

.page-contact__hero-section {
    position: relative;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    padding-top: 10px; /* Chỉ một khoảng đệm nhỏ, body đã xử lý offset header */
    text-align: center;
    overflow: hidden;
}

.page-contact__hero-image-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.page-contact__hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.4); /* Làm tối hình ảnh để chữ dễ đọc */
}

.page-contact__hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    background: rgba(0, 0, 0, 0.4); /* Nền mờ để tăng độ tương phản */
    border-radius: 10px;
}

.page-contact__main-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.page-contact__intro-text {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.page-contact__cta-button {
    display: inline-block;
    padding: 15px 30px;
    background: var(--button-gradient);
    color: var(--text-main);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
}

.page-contact__cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3), 0 0 15px var(--glow-color);
}

.page-contact__cta-button--large {
    padding: 18px 40px;
    font-size: 1.25rem;
}

.page-contact__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    box-sizing: border-box;
}

.page-contact__section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--text-main);
    text-align: center;
    margin-bottom: 20px;
    font-weight: 700;
}

.page-contact__section-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-contact__methods-grid,
.page-contact__why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.page-contact__method-card,
.page-contact__feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-contact__method-card:hover,
.page-contact__feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4), 0 0 20px var(--glow-color);
}

.page-contact__method-icon {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
    object-fit: contain;
}

.page-contact__method-title,
.page-contact__feature-title {
    font-size: 1.6rem;
    color: var(--text-main);
    margin-bottom: 15px;
    font-weight: 600;
}

.page-contact__method-description,
.page-contact__feature-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.page-contact__btn-primary {
    display: inline-block;
    padding: 12px 25px;
    background: var(--button-gradient);
    color: var(--text-main);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: none;
    cursor: pointer;
}

.page-contact__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3), 0 0 10px var(--glow-color);
}

.page-contact__btn-secondary {
    display: inline-block;
    padding: 12px 25px;
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background-color 0.3s ease, color 0.3s ease;
    cursor: pointer;
}

.page-contact__btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--text-main);
}

.page-contact__email-address,
.page-contact__phone-number {
    color: var(--gold-color);
    font-weight: 600;
    margin-top: 10px;
    font-size: 1.1rem;
}

.page-contact__form-section {
    background-color: var(--deep-green);
    padding: 60px 20px;
    border-top: 1px solid var(--divider-color);
    border-bottom: 1px solid var(--divider-color);
}

.page-contact__form-wrapper {
    display: flex;
    gap: 40px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.page-contact__contact-form {
    flex: 1;
    min-width: 300px;
    max-width: 600px;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.page-contact__form-group {
    margin-bottom: 20px;
}

.page-contact__form-label {
    display: block;
    color: var(--text-main);
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 1rem;
}

.page-contact__form-input,
.page-contact__form-textarea {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    font-size: 1rem;
    box-sizing: border-box;
}

.page-contact__form-input::placeholder,
.page-contact__form-textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.page-contact__form-input:focus,
.page-contact__form-textarea:focus {
    border-color: var(--glow-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(87, 227, 141, 0.3);
}

.page-contact__form-illustration {
    flex: 1;
    min-width: 300px;
    max-width: 400px;
    height: auto;
    border-radius: 12px;
    object-fit: cover;
}

.page-contact__social-media-section {
    padding: 60px 20px;
    text-align: center;
}

.page-contact__social-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
}

.page-contact__social-icon-link {
    display: inline-block;
    border-radius: 50%;
    background: var(--card-bg);
    padding: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.page-contact__social-icon-link:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4), 0 0 10px var(--glow-color);
}

.page-contact__social-icon {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.page-contact__faq-section {
    background-color: var(--deep-green);
    padding: 60px 20px;
    border-top: 1px solid var(--divider-color);
}

.page-contact__faq-list {
    max-width: 900px;
    margin: 40px auto 0 auto;
}

.page-contact__faq-item {
    background: var(--card-bg);
    margin-bottom: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.page-contact__faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 25px;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    background: var(--deep-green);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
    list-style: none; /* For details/summary */
}

.page-contact__faq-item[open] > .page-contact__faq-question {
    background-color: var(--primary-color);
}

.page-contact__faq-question::-webkit-details-marker {
    display: none;
}

.page-contact__faq-qtext {
    flex-grow: 1;
    margin-right: 15px;
}

.page-contact__faq-toggle {
    font-size: 1.5rem;
    line-height: 1;
    color: var(--gold-color);
    transition: transform 0.3s ease;
}

.page-contact__faq-item[open] .page-contact__faq-toggle {
    transform: rotate(45deg);
}

.page-contact__faq-answer {
    padding: 20px 25px;
    font-size: 1rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--divider-color);
}

.page-contact__faq-answer p {
    margin: 0;
}

.page-contact__cta-register-section {
    padding: 80px 20px;
    text-align: center;
    background: linear-gradient(90deg, var(--deep-green), var(--primary-color));
    border-top: 1px solid var(--divider-color);
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .page-contact__hero-content {
        padding: 15px;
    }
    .page-contact__main-title {
        font-size: clamp(2rem, 4.5vw, 3rem);
    }
    .page-contact__intro-text {
        font-size: 1rem;
    }
    .page-contact__methods-grid,
    .page-contact__why-us-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .page-contact__hero-section {
        padding: 40px 15px;
        padding-top: 10px !important; /* Body đã xử lý offset header */
    }
    .page-contact__hero-content {
        padding: 15px;
    }
    .page-contact__main-title {
        font-size: clamp(1.8rem, 7vw, 2.5rem);
    }
    .page-contact__intro-text {
        font-size: 0.95rem;
    }
    .page-contact__cta-button {
        padding: 12px 25px;
        font-size: 1rem;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
    }
    .page-contact__cta-button--large {
        padding: 15px 30px;
        font-size: 1.1rem;
    }
    .page-contact__container {
        padding: 30px 15px;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    .page-contact__section-title {
        font-size: clamp(1.5rem, 6vw, 2.2rem);
    }
    .page-contact__section-description {
        font-size: 0.9rem;
    }
    .page-contact__methods-grid,
    .page-contact__why-us-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .page-contact__method-card,
    .page-contact__feature-card {
        padding: 20px;
    }
    .page-contact__method-icon {
        width: 80px;
        height: 80px;
    }
    .page-contact__form-wrapper {
        flex-direction: column;
        gap: 20px;
    }
    .page-contact__contact-form {
        padding: 25px;
        max-width: 100%;
    }
    .page-contact__form-illustration {
        max-width: 100%;
        height: auto;
        width: 100% !important;
    }
    .page-contact__social-links {
        gap: 20px;
        flex-wrap: wrap;
    }
    .page-contact__social-icon-link {
        padding: 8px;
    }
    .page-contact__social-icon {
        width: 40px;
        height: 40px;
    }
    .page-contact__faq-question {
        padding: 15px 20px;
        font-size: 1rem;
    }
    .page-contact__faq-answer {
        padding: 15px 20px;
        font-size: 0.9rem;
    }
    
    /* Tất cả hình ảnh phải có max-width: 100%; height: auto; */
    .page-contact img {
        max-width: 100% !important;
        width: 100% !important;
        height: auto !important;
        display: block !important;
    }
    .page-contact__section,
    .page-contact__card,
    .page-contact__container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-contact__btn-primary,
    .page-contact__btn-secondary,
    .page-contact a[class*="button"],
    .page-contact a[class*="btn"] {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        white-space: normal !important;
        word-wrap: break-word !important;
        padding-left: 15px;
        padding-right: 15px;
    }
    .page-contact__cta-buttons,
    .page-contact__button-group,
    .page-contact__btn-container {
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        padding-left: 15px;
        padding-right: 15px;
        flex-wrap: wrap !important;
        gap: 10px;
    }
    .page-contact__cta-buttons {
        display: flex;
        flex-direction: column; 
    }
}