:root {
    --gold: #c5a059;
    --gold-light: #e2c89a;
    --dark: #1a1a1a;
    --cream: #fdfbf7;
    --text: #4a4a4a;
    --text-light: #8a8a8a;
    --white: #ffffff;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Plus Jakarta Sans', sans-serif;
}

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

body {
    background-color: var(--cream);
    color: var(--text);
    font-family: var(--font-sans);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.center { text-align: center; }

nav {
    height: 90px;
    display: flex;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(253, 251, 247, 0.9);
    backdrop-filter: blur(10px);
    transition: all 0.3s;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 1px;
}

.logo span { color: var(--gold); }

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

.lang-switcher {
    display: flex;
    gap: 8px;
    margin-right: 2rem;
    background: #eee;
    padding: 4px;
    border-radius: 50px;
}

.lang-btn {
    border: none;
    background: none;
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 700;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    transition: all 0.3s;
    color: var(--text-light);
}

.lang-btn.active {
    background: var(--dark);
    color: white;
}

.links a {
    color: var(--dark);
    text-decoration: none;
    margin-left: 2.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    transition: color 0.3s;
}

.links a:hover { color: var(--gold); }

.btn-nav {
    background: var(--dark);
    color: white !important;
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
}

header {
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 90px;
    background: #f8f5f0;
}

header .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

h1 {
    font-family: var(--font-serif);
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 2rem;
    color: var(--dark);
}

h1 span { font-style: italic; color: var(--gold); }

header p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 550px;
}

.btn-gold {
    display: inline-block;
    background: var(--gold);
    color: white;
    padding: 1.2rem 2.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-gold:hover {
    background: #b38f4a;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(197, 160, 89, 0.3);
}

.hero-image img {
    width: 100%;
    border-radius: 300px 300px 40px 40px;
    box-shadow: 0 40px 80px rgba(0,0,0,0.1);
}

.section { padding: 10rem 0; }
.section.light { background: var(--white); }

.section h2 {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    margin-bottom: 4rem;
    color: var(--dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.service-card {
    background: var(--white);
    padding: 3rem;
    border-radius: 30px;
    border: 1px solid rgba(197, 160, 89, 0.1);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    text-align: center;
}

.service-card:hover {
    border-color: var(--gold);
    transform: translateY(-15px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.05);
}

.service-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 20px;
    margin-bottom: 2rem;
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.pricing-container {
    max-width: 800px;
    margin: 0 auto;
}

.price-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    border-bottom: 1px solid rgba(197, 160, 89, 0.2);
    font-size: 1.2rem;
}

.price-value {
    font-family: var(--font-serif);
    font-weight: 700;
    color: var(--gold);
    font-size: 1.4rem;
}

.ai-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.ai-text h2 {
    text-align: left;
    margin-bottom: 2rem;
}

.ai-text p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.ai-features {
    list-style: none;
    margin-bottom: 2rem;
}

.ai-features li {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.ai-hint {
    font-size: 0.9rem;
    color: var(--gold);
    font-weight: 600;
}

.ai-visual img {
    width: 100%;
    border-radius: 40px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.1);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 20px;
    cursor: pointer;
    transition: transform 0.3s;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

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

.contacts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: var(--white);
    padding: 3rem;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 2rem;
    border: 1px solid rgba(197, 160, 89, 0.1);
    transition: all 0.3s;
}

.contact-card:hover {
    border-color: var(--gold);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2.5rem;
    background: var(--cream);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
}

.contact-info .label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--gold);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.contact-info p, .contact-info a {
    font-size: 1.2rem;
    color: var(--dark);
    text-decoration: none;
    font-weight: 600;
}

.zalo-link {
    color: #0084ff !important;
}

.booking-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.booking-form {
    display: grid;
    gap: 1.5rem;
    background: var(--cream);
    padding: 4rem;
    border-radius: 40px;
    border: 1px solid rgba(197, 160, 89, 0.1);
}

.form-group input, .form-group select {
    width: 100%;
    padding: 1.2rem;
    border-radius: 15px;
    border: 1px solid rgba(0,0,0,0.1);
    font-family: var(--font-sans);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--gold);
}

.form-status {
    text-align: center;
    margin-top: 1.5rem;
    font-weight: 600;
}

footer {
    padding: 5rem 0;
    text-align: center;
    color: var(--text-light);
    border-top: 1px solid rgba(0,0,0,0.05);
}

/* AI Widget */
.ai-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 2000;
    font-family: var(--font-sans);
}

.chat-toggle {
    background: var(--dark);
    color: white;
    border: none;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transition: transform 0.3s;
}

.chat-toggle:hover { transform: scale(1.05); }

.chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    height: 500px;
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.hidden {
    opacity: 0;
    transform: translateY(20px) scale(0.9);
    pointer-events: none;
}

.chat-header {
    background: var(--dark);
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

#close-chat {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

.chat-messages {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    max-width: 80%;
    padding: 0.8rem 1.2rem;
    border-radius: 15px;
    font-size: 0.95rem;
}

.message.bot {
    background: #f0f0f0;
    align-self: flex-start;
    border-bottom-left-radius: 2px;
}

.message.user {
    background: var(--gold);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 2px;
}

.chat-input {
    padding: 1.2rem;
    border-top: 1px solid #eee;
    display: flex;
    gap: 10px;
}

.chat-input input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 10px;
    outline: none;
}

.chat-input button {
    background: var(--dark);
    color: white;
    border: none;
    padding: 0 1.2rem;
    border-radius: 10px;
    cursor: pointer;
}

@media (max-width: 968px) {
    header .container, .ai-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    h1 { font-size: 3rem; }
    .hero-content { order: 2; }
    .hero-image { order: 1; }
    .ai-text { text-align: center; }
    .ai-text h2 { text-align: center; }
    .ai-features li { justify-content: center; }
    .chat-window { width: 320px; }
    .links {
        display: none;
    }
}