/* 
 * Dalat Serenity Homestay - Luxury Minimalism Style
 * Phong cách tối giản sang trọng cho landing page homestay
 */

/* ===== RESET & BASE STYLES ===== */
:root {
    /* Main colors */
    --color-primary: #9c8164;
    --color-primary-light: #b69c82;
    --color-primary-dark: #7a6550;
    --color-secondary: #2c3e50;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e9ecef;
    
    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Poppins', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.8s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 5px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 62.5%; /* 10px = 1rem */
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1.6rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    will-change: transform; /* Tối ưu cho animations */
}

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

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-lg) 0;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
}

h1 {
    font-size: 4.2rem;
}

h2 {
    font-size: 3.6rem;
}

h3 {
    font-size: 2.4rem;
}

h4 {
    font-size: 2rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header .subtitle {
    display: block;
    font-family: var(--font-body);
    font-size: 1.4rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.section-header h2 {
    position: relative;
    display: inline-block;
    padding-bottom: var(--spacing-sm);
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: var(--color-primary);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 1.2rem 2.4rem;
    font-family: var(--font-body);
    font-size: 1.4rem;
    font-weight: 500;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    border-radius: 0;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: -100%;
    background-color: rgba(255, 255, 255, 0.2);
    transition: transform 0.4s ease;
    transform: skewX(-15deg);
    z-index: 1;
}

.btn:hover::after {
    transform: translateX(100%) skewX(-15deg);
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

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

.btn-light:hover {
    background-color: var(--color-bg-alt);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: 1.1rem 2.3rem;
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo a:hover .logo-img {
    transform: scale(1.05);
}

.logo h1 {
    font-size: 2.4rem;
    margin-bottom: 0;
    color: var(--color-secondary);
}

.logo p {
    font-size: 1rem;
    letter-spacing: 2px;
    color: var(--color-primary);
    margin-bottom: 0;
}

.main-nav ul {
    display: flex;
}

.main-nav li:not(:last-child) {
    margin-right: var(--spacing-md);
}

.main-nav a {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.5rem 0;
    position: relative;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 100;
    padding: 0;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-secondary);
    margin: 5px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-menu-btn:focus {
    outline: none;
}

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
    will-change: opacity, transform;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.8);
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 0 var(--spacing-md);
    z-index: 1;
}

.hero-content h2 {
    font-size: 4.8rem;
    color: white;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.booking-form {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) translateY(50%);
    background-color: white;
    padding: var(--spacing-md);
    width: 90%;
    max-width: 800px;
    box-shadow: var(--shadow-lg);
    z-index: 2;
}

.booking-form h3 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.booking-form form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-light);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    font-family: var(--font-body);
    font-size: 1.4rem;
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-fast);
}

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

.booking-form button {
    grid-column: 1 / -1;
}

/* ===== ABOUT SECTION ===== */
.about {
    background-color: var(--color-bg-alt);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.feature {
    display: flex;
    align-items: center;
}

.feature i {
    font-size: 2rem;
    color: var(--color-primary);
    margin-right: var(--spacing-xs);
}

.about-image img {
    box-shadow: var(--shadow-md);
}

/* ===== ROOMS SECTION ===== */
.rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.room-card {
    background-color: white;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}

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

.room-image {
    height: 250px;
    overflow: hidden;
}

.room-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
}

.room-card:hover .room-image img {
    transform: scale(1.05);
}

.room-content {
    padding: var(--spacing-md);
}

.room-features {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.room-features span {
    font-size: 1.4rem;
    color: var(--color-text-light);
    margin-right: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.room-features i {
    color: var(--color-primary);
    margin-right: 5px;
}

.room-price {
    margin: var(--spacing-sm) 0;
}

.price {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-primary);
}

.per-night {
    font-size: 1.4rem;
    color: var(--color-text-light);
}

/* ===== EXPERIENCES SECTION ===== */
.experiences {
    background-color: var(--color-bg-alt);
}

.experiences-slider {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.experience-slide {
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.experience-slide::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    z-index: 1;
}

.experience-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-medium);
}

.experience-slide:hover img {
    transform: scale(1.05);
}

.experience-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    z-index: 2;
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.experience-content h3 {
    color: white;
    margin-bottom: var(--spacing-xs);
}

/* ===== GALLERY SECTION ===== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 10px;
}

.gallery-item {
    overflow: hidden;
    position: relative;
    cursor: pointer;
}

.gallery-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(44, 62, 80, 0.3);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

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

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
    background-color: var(--color-bg-alt);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: var(--spacing-md);
}

.testimonial-content {
    background-color: white;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    border-left: 3px solid var(--color-primary);
}

.rating {
    margin-bottom: var(--spacing-sm);
}

.rating i {
    color: #ffc107;
    margin-right: 2px;
}

.testimonial-author {
    margin-top: var(--spacing-sm);
}

.testimonial-author h4 {
    margin-bottom: 0;
}

.testimonial-author span {
    font-size: 1.4rem;
    color: var(--color-text-light);
}

/* ===== CONTACT SECTION ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-details {
    margin: var(--spacing-md) 0;
}

.contact-item {
    display: flex;
    margin-bottom: var(--spacing-sm);
}

.contact-item i {
    font-size: 2rem;
    color: var(--color-primary);
    margin-right: var(--spacing-sm);
    margin-top: 5px;
}

.contact-item h4 {
    margin-bottom: 5px;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-bg-alt);
    color: var(--color-primary);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--color-primary);
    color: white;
}

.contact-form {
    background-color: white;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.contact-form h3 {
    margin-bottom: var(--spacing-md);
}

/* ===== MAP SECTION ===== */
.map {
    padding: 0;
}

.map-container {
    height: 450px;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-secondary);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-img {
    height: 50px;
    width: auto;
    filter: brightness(0.9);
}

.footer-logo h2 {
    color: white;
    margin-bottom: 5px;
}

.footer-logo p {
    color: var(--color-primary);
    font-size: 1.2rem;
    letter-spacing: 2px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h3 {
    color: white;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--color-primary);
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column ul li a {
    color: #ccc;
    transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
    color: var(--color-primary);
}

.contact-list li {
    display: flex;
    margin-bottom: var(--spacing-xs);
    color: #ccc;
}

.contact-list li i {
    color: var(--color-primary);
    margin-right: var(--spacing-xs);
    margin-top: 5px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.payment-methods {
    display: flex;
    align-items: center;
}

.payment-methods span {
    margin-right: var(--spacing-sm);
    font-size: 1.4rem;
}

.payment-methods i {
    font-size: 2.4rem;
    margin-left: var(--spacing-xs);
    color: #ccc;
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 4rem;
    height: 4rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

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

.back-to-top:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-3px);
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
/* Tối ưu cho animations */
.fade-in, .fade-in-stagger, .hero-slide, .experience-slide {
    will-change: opacity, transform;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* Tối ưu cho mobile */
@media (max-width: 768px) {
    .hero {
        height: 80vh;
    }
    
    .hero-content h2 {
        font-size: 3.6rem;
    }
    
    .hero-content p {
        font-size: 1.6rem;
    }
    
    .booking-form {
        width: 95%;
        transform: translateX(-50%);
        bottom: var(--spacing-md);
    }
    
    .rooms-grid,
    .experiences-slider,
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
    
    .footer-content,
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .payment-methods {
        margin-top: var(--spacing-sm);
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    /* Giảm độ phức tạp của animations trên mobile */
    .fade-in, .fade-in-stagger {
        transition: opacity 0.3s ease;
    }
    
    /* Tối ưu hiệu suất render trên mobile */
    .hero-slide img, .gallery-item img, .experience-slide img {
        transform: translateZ(0);
    }
}

/* ===== RESPONSIVE STYLES ===== */
@media (max-width: 1024px) {
    html {
        font-size: 60%;
    }
    
    .hero-content h2 {
        font-size: 4.2rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .about-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .header {
        position: fixed;
        width: 100%;
        z-index: 1000;
        background-color: rgba(255, 255, 255, 0.98);
        box-shadow: var(--shadow-md);
    }
    
    .header-content {
        height: 70px;
        position: relative;
    }
    
    .main-nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.98);
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        padding: 1rem 0;
        z-index: 999;
        transition: all 0.3s ease;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .main-nav.active {
        display: block;
        animation: slideDown 0.3s ease forwards;
    }
    
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .main-nav ul {
        flex-direction: column;
        padding: 0 2rem;
    }
    
    .main-nav li {
        margin: 0;
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }
    
    .main-nav li:last-child {
        border-bottom: none;
    }
    
    .main-nav a {
        display: block;
        padding: 1.5rem 0;
        font-size: 1.6rem;
        text-align: left;
    }
    
    .main-nav a::after {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
        position: relative;
        z-index: 1000;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .booking-btn {
        margin-right: 2rem;
    }
    
    /* Adjust hero section to account for fixed header */
    .hero {
        padding-top: 70px;
    }
}

@media (max-width: 576px) {
    .hero-content h2 {
        font-size: 3rem;
    }
    
    .hero-content p {
        font-size: 1.6rem;
    }
    
    .booking-form {
        padding: var(--spacing-sm);
    }
    
    .booking-form form {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-medium) forwards;
}

/* Staggered animations for children */
.fade-in-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn var(--transition-medium) forwards;
}

.fade-in-stagger > *:nth-child(1) { animation-delay: 0.1s; }
.fade-in-stagger > *:nth-child(2) { animation-delay: 0.2s; }
.fade-in-stagger > *:nth-child(3) { animation-delay: 0.3s; }
.fade-in-stagger > *:nth-child(4) { animation-delay: 0.4s; }
.fade-in-stagger > *:nth-child(5) { animation-delay: 0.5s; }
.fade-in-stagger > *:nth-child(6) { animation-delay: 0.6s; }

/* ===== CONTACT FORM STYLES ===== */
.form-row {
    display: flex;
    gap: 2rem;
    margin-bottom: var(--spacing-sm);
}

.form-group.half {
    flex: 1;
}

.contact-form select {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1.4rem;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: border-color var(--transition-fast);
}

.contact-form select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.contact-form input[type="date"] {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1.4rem;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: border-color var(--transition-fast);
}

.contact-form input[type="date"]:focus {
    outline: none;
    border-color: var(--color-primary);
}

@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
/* Hiệu ứng hover mượt mà */
a, button, .btn, .gallery-item, .room-card, .experience-slide {
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Hiệu ứng active cho links */
a.active-link {
    color: var(--color-primary-dark);
    transform: scale(1.05);
}

/* Hiệu ứng form */
input:focus, textarea:focus, select:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(156, 129, 100, 0.2);
    transition: box-shadow 0.3s ease;
}

/* Hiệu ứng thông báo thành công */
.success-message {
    background-color: #e8f5e9;
    color: #2e7d32;
    padding: 2rem;
    border-radius: 4px;
    text-align: center;
    animation: fadeIn 0.5s ease forwards;
}

.success-message i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

/* Hiệu ứng lỗi form */
.error {
    border-color: #f44336 !important;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Experience slide hover effect */
.experience-slide {
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.experience-slide::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    z-index: 1;
}

.experience-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    z-index: 2;
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.experience-slide:hover .experience-content {
    transform: translateY(-10px);
}