/**
 * BANNHA1435 - Website Stylesheet
 * Bán Nhà 1435 Nguyễn Văn Linh, Quận 7
 * Design: Teal (#0f766e) + Gold (#d4af37)
 */

/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

:root {
    --primary-color: #0f766e;
    --secondary-color: #d4af37;
    --dark-color: #1a1a1a;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    line-height: 1.2;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    color: var(--dark-color);
    font-weight: 500;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    transition: var(--transition);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    margin-top: 70px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://page.gensparksite.com/v1/base64_upload/b29d2eaece3b9304e924f0bbad795882') center/cover no-repeat;
    animation: kenBurns 20s ease-in-out infinite alternate;
    z-index: 1;
}

@keyframes kenBurns {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.9), rgba(212, 175, 55, 0.8));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    color: var(--white);
    padding: 40px 20px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 20px;
    font-weight: 500;
    animation: fadeInUp 1.2s ease;
}

.hero-tagline {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.95;
    animation: fadeInUp 1.4s ease;
}

.hero-info {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
    animation: fadeInUp 1.6s ease;
}

.info-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 20px 30px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: var(--transition);
}

.info-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.25);
}

.info-card i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.info-card .label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.9;
}

.info-card .value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
}

.hero-contact {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 40px;
    animation: fadeInUp 1.8s ease;
}

.contact-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1.1rem;
}

.contact-info i {
    color: var(--secondary-color);
}

.contact-info a {
    color: var(--white);
    font-weight: 600;
    border-bottom: 2px solid var(--secondary-color);
}

.btn-primary {
    display: inline-block;
    background: var(--secondary-color);
    color: var(--dark-color);
    padding: 18px 40px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition);
    animation: fadeInUp 2s ease;
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.6);
    background: #e5c048;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 2rem;
    color: var(--white);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ========================================
   SECTION HEADERS
   ======================================== */

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-color);
}

/* ========================================
   OVERVIEW SECTION
   ======================================== */

.overview {
    background: var(--light-color);
}

.overview-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.overview-description h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.overview-description p {
    margin-bottom: 15px;
    line-height: 1.8;
}

.property-table {
    background: var(--white);
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.property-table table {
    width: 100%;
    border-collapse: collapse;
}

.property-table th,
.property-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.property-table th {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
}

.property-table tr:last-child td {
    border-bottom: none;
}

.property-table strong {
    color: var(--primary-color);
}

.value-history {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}

.value-history h3 {
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.value-history p {
    margin-bottom: 15px;
    line-height: 1.8;
}

/* ========================================
   LOCATION SECTION
   ======================================== */

.location-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.location-card {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.location-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.location-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.location-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* ========================================
   VIP HISTORY SECTION
   ======================================== */

.vip-history {
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.05), rgba(212, 175, 55, 0.05));
    position: relative;
}

.vip-history::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://page.gensparksite.com/v1/base64_upload/cb5df5fa2552ede195fd2ebf6e1f59f0') center/cover no-repeat;
    opacity: 0.03;
    z-index: 0;
}

.vip-history .container {
    position: relative;
    z-index: 1;
}

.vip-intro {
    text-align: center;
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 40px;
}

.vip-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.vip-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-top: 4px solid transparent;
    background-image: linear-gradient(white, white), 
                      linear-gradient(90deg, var(--secondary-color), var(--primary-color));
    background-origin: border-box;
    background-clip: padding-box, border-box;
    transition: var(--transition);
}

.vip-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-top-width: 6px;
}

.vip-icon {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.vip-content h4 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.vip-country {
    display: block;
    font-size: 0.9rem;
    color: var(--gray-color);
    margin-bottom: 10px;
}

.vip-quote {
    background: var(--primary-color);
    color: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    position: relative;
    margin-bottom: 20px;
}

.vip-quote i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.vip-quote p {
    font-size: 1.5rem;
    font-style: italic;
    margin: 20px 0;
    line-height: 1.8;
}

.vip-footer {
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray-color);
    font-style: italic;
}

/* ========================================
   FENG SHUI SECTION
   ======================================== */

.fengshui {
    background: var(--light-color);
}

.fengshui-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.fengshui-card {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.fengshui-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.fengshui-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.fengshui-card h3 {
    color: var(--dark-color);
    margin-bottom: 15px;
}

/* ========================================
   WHY DIFFERENT SECTION
   ======================================== */

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.reason-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.reason-card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: var(--shadow-lg);
}

.reason-number {
    position: absolute;
    top: -20px;
    right: -20px;
    font-size: 6rem;
    font-weight: 700;
    opacity: 0.2;
}

.reason-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* ========================================
   TARGET AUDIENCE SECTION
   ======================================== */

.target-audience {
    background: var(--light-color);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.audience-card {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.audience-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.audience-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.audience-icon i {
    font-size: 2.5rem;
    color: var(--white);
}

.audience-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* ========================================
   GALLERY SECTION
   ======================================== */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    cursor: pointer;
    aspect-ratio: 4/3;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.9), rgba(212, 175, 55, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.gallery-overlay i {
    font-size: 3rem;
    color: var(--white);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

/* ========================================
   LIGHTBOX
   ======================================== */

.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.95);
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    animation: zoom 0.3s;
}

@keyframes zoom {
    from { transform: scale(0); }
    to { transform: scale(1); }
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: var(--white);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.lightbox-close:hover {
    color: var(--secondary-color);
}

.lightbox-prev,
.lightbox-next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    width: auto;
    padding: 16px;
    margin-top: -50px;
    color: white;
    font-weight: bold;
    font-size: 20px;
    transition: var(--transition);
    border-radius: 0 3px 3px 0;
    user-select: none;
    background-color: rgba(0, 0, 0, 0.5);
}

.lightbox-next {
    right: 0;
    border-radius: 3px 0 0 3px;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background-color: rgba(212, 175, 55, 0.8);
}

.lightbox-caption {
    margin: auto;
    display: block;
    max-width: 80%;
    text-align: center;
    color: var(--white);
    padding: 20px;
    font-size: 1.1rem;
}

.lightbox-counter {
    text-align: center;
    color: var(--white);
    padding: 10px;
    font-size: 1rem;
}

/* ========================================
   MAP SECTION
   ======================================== */

.map-container {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 40px;
}

.map-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.map-highlight {
    background: var(--light-color);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    display: flex;
    align-items: center;
    gap: 15px;
}

.map-highlight i {
    font-size: 2rem;
    color: var(--primary-color);
}

/* ========================================
   CONTACT SECTION
   ======================================== */

.contact-section {
    background: var(--light-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
}

.contact-info-box {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
}

.contact-info-box h3 {
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-detail i {
    font-size: 1.5rem;
    color: var(--secondary-color);
    background: rgba(255, 255, 255, 0.2);
    padding: 10px;
    border-radius: 50%;
}

.contact-detail strong {
    display: block;
    margin-bottom: 5px;
}

.contact-detail a {
    color: var(--white);
    font-weight: 600;
    border-bottom: 2px solid var(--secondary-color);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-group label i {
    color: var(--primary-color);
    margin-right: 8px;
}

.required {
    color: #dc3545;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-submit {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-submit i {
    margin-right: 10px;
}

.form-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 5px;
    display: none;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3,
.footer-col h4 {
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.footer-col p {
    margin-bottom: 10px;
    opacity: 0.9;
}

.footer-col i {
    margin-right: 10px;
    color: var(--secondary-color);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 10px;
    opacity: 0.8;
}

/* ========================================
   SCROLL TO TOP
   ======================================== */

.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: var(--dark-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 999;
}

.scroll-top:hover {
    transform: translateY(-5px);
    background: #e5c048;
}

.scroll-top.show {
    display: flex;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 30px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.4rem;
    }

    .hero-info {
        flex-direction: column;
    }

    .overview-content {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .lightbox-content {
        max-width: 95%;
    }

    .lightbox-prev,
    .lightbox-next {
        padding: 10px;
        font-size: 16px;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}