/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #d4a574;
    --secondary-color: #1a1a1a;
    --text-color: #333;
    --light-bg: #f8f8f8;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

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

button {
    cursor: pointer;
    border: none;
    outline: none;
    transition: var(--transition);
}

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

.row {
    display: flex;
    gap: 40px;
    align-items: center;
    flex-wrap: wrap;
}

.col-left,
.col-right,
.col-content,
.col-image,
.col-form {
    flex: 1;
    min-width: 300px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

h1 {
    font-size: 3.5rem;
    text-transform: uppercase;
}

h2 {
    font-size: 2.5rem;
    text-transform: uppercase;
}

h3 {
    font-size: 1.8rem;
}

h4 {
    font-size: 1.3rem;
}

.highlight {
    color: var(--primary-color);
}

.text-white {
    color: var(--white);
}

.divider {
    width: 80px;
    height: 3px;
    background: var(--primary-color);
    margin: 20px 0;
}

.section-desc {
    font-size: 1.1rem;
    margin-bottom: 40px;
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== BUTTONS ===== */
.btn-primary,
.btn-secondary,
.btn-submit,
.btn-header {
    padding: 15px 35px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 5px;
    text-transform: uppercase;
    display: inline-block;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: #c39563;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(212, 165, 116, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-submit {
    width: 100%;
    background: var(--primary-color);
    color: var(--white);
}

.btn-submit:hover {
    background: #c39563;
}

.btn-header {
    background: var(--primary-color);
    color: var(--white);
    padding: 10px 25px;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    padding: 10px 0;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

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

.logo img {
    height: 50px;
    transition: var(--transition);
}

.header.scrolled .logo img {
    height: 40px;
}

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

.nav a {
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
}

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

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

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--secondary-color);
    transition: var(--transition);
}

/* ===== HERO SLIDER ===== */
.hero-slider {
    position: relative;
    height: 100vh;
    margin-top: 80px;
    overflow: hidden;
}

.slider-container {
    position: relative;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
}

.slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
}

.slide-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
}

.slide-content h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

.slide-content p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-shadow: 1px 1px 5px rgba(0,0,0,0.5);
}

.slider-nav button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.3);
    color: var(--white);
    font-size: 3rem;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    z-index: 100;
}

.slider-nav button:hover {
    background: rgba(255,255,255,0.5);
}

.slider-nav .prev {
    left: 20px;
}

.slider-nav .next {
    right: 20px;
}

.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 100;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--primary-color);
    transform: scale(1.3);
}

/* ===== PARALLAX SECTIONS ===== */
.parallax-section {
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

.parallax-bg {
    position: absolute;
    top: -50%;
    left: 0;
    width: 100%;
    height: 200%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -1;
}

.parallax-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 0;
}

.parallax-section .container {
    position: relative;
    z-index: 1;
}

/* ===== SECTION CHÍNH SÁCH ===== */
.section-chinh-sach {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

.policy-list {
    margin: 30px 0;
}

.policy-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    transition: var(--transition);
}

.policy-item:hover {
    background: rgba(255,255,255,0.2);
    transform: translateX(10px);
}

.policy-item img {
    width: 40px;
    height: 40px;
}

.policy-item p {
    color: var(--white);
    font-size: 1.1rem;
}

.booking-img {
    margin-top: 30px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* ===== FORM BOX ===== */
.form-box {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.form-box h3 {
    text-align: center;
    margin-bottom: 15px;
}

.form-box p {
    text-align: center;
    margin-bottom: 25px;
    color: #666;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form select {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(212, 165, 116, 0.2);
}

.form-note {
    text-align: center;
    font-size: 0.9rem;
    color: #666;
    margin-top: 15px;
}

.form-note a {
    color: var(--primary-color);
    text-decoration: underline;
}

/* ===== SECTION GIỚI THIỆU ===== */
.section-intro {
    padding: 100px 0;
    background: var(--light-bg);
}

.lead {
    font-size: 1.2rem;
    margin-bottom: 30px;
    line-height: 1.8;
}

.info-grid {
    display: grid;
    gap: 20px;
    margin: 30px 0;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 15px;
    background: var(--white);
    border-left: 3px solid var(--primary-color);
    border-radius: 5px;
    transition: var(--transition);
}

.info-item:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.info-item strong {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.hover-zoom {
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.hover-zoom img {
    transition: transform 0.5s ease;
}

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

/* ===== SECTION SẢN PHẨM ===== */
.section-products {
    padding: 100px 0;
}

.product-row {
    display: flex;
    gap: 50px;
    align-items: center;
    margin-bottom: 80px;
}

.product-row.reverse {
    flex-direction: row-reverse;
}

.product-image,
.product-content {
    flex: 1;
}

.product-content ul {
    list-style: none;
    margin: 20px 0;
}

.product-content ul li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
}

.product-content ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* ===== SECTION VỊ TRÍ ===== */
.section-location {
    color: var(--white);
}

.location-list {
    list-style: none;
    margin: 20px 0;
}

.location-list li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: var(--white);
}

.location-list li::before {
    content: '📍';
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

.planning-section,
.connection-section {
    margin-top: 80px;
}

.planning-img {
    margin: 30px 0;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

/* ===== SECTION TIỆN ÍCH ===== */
.section-amenities {
    padding: 100px 0;
    background: var(--light-bg);
}

.amenities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.amenity-card {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    height: 300px;
    cursor: pointer;
}

.amenity-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.amenity-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--white);
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.amenity-card:hover img {
    transform: scale(1.1);
}

.amenity-card:hover .amenity-overlay {
    transform: translateY(0);
}

/* ===== SECTION TIẾN ĐỘ ===== */
.section-progress {
    padding: 100px 0;
    text-align: center;
}

.progress-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: left;
}

.progress-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* ===== SECTION TIỀM NĂNG ===== */
.section-potential {
    color: var(--white);
}

.potential-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.potential-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
}

.potential-card:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-10px);
}

.potential-card img {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
}

.potential-card h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.stats-section {
    margin-top: 80px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(255,255,255,0.2);
    transform: scale(1.05);
}

.stat-number {
    font-size: 4rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    color: var(--white);
    line-height: 1.4;
}

/* ===== SECTION FORM CUỐI ===== */
.section-final-form {
    padding: 100px 0;
    background: var(--light-bg);
}

.benefits-list {
    list-style: none;
    margin: 30px 0;
}

.benefits-list li {
    padding: 15px 0;
    padding-left: 40px;
    position: relative;
    font-size: 1.1rem;
}

.benefits-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.5rem;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 50px 0 30px;
}

.footer-content {
    text-align: center;
    margin-bottom: 30px;
}

.footer-logo {
    width: 150px;
    margin: 0 auto 20px;
}

.footer h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.offices {
    margin: 20px 0;
}

.offices p {
    margin-bottom: 10px;
}

.footer-note {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 20px;
    text-align: center;
    font-size: 0.9rem;
    color: #999;
}

.footer-note a {
    color: var(--primary-color);
}

/* ===== FIXED BUTTONS ===== */
.fixed-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.btn-fixed {
    padding: 15px 25px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    transition: var(--transition);
}

.btn-download {
    background: var(--primary-color);
    color: var(--white);
}

.btn-download:hover {
    background: #c39563;
    transform: translateY(-3px);
}

.btn-zalo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #0068ff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.btn-zalo img {
    width: 35px;
    height: 35px;
}

.btn-zalo:hover {
    transform: scale(1.1);
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    font-size: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: #c39563;
    transform: translateY(-5px);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .nav {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        padding: 30px;
        transition: var(--transition);
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    }
    
    .nav.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .slide-content h1 {
        font-size: 2rem;
    }
    
    .slide-content p {
        font-size: 1.2rem;
    }
    
    .product-row,
    .product-row.reverse {
        flex-direction: column;
    }
    
    .amenities-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .fixed-buttons {
        right: 15px;
        bottom: 15px;
    }
    
    .btn-download {
        font-size: 0.8rem;
        padding: 12px 20px;
    }
    
    .parallax-bg {
        background-attachment: scroll;
    }
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

[data-aos] {
    opacity: 0;
    transition-property: opacity, transform;
}

[data-aos].aos-animate {
    opacity: 1;
}