/* ===================================
   GUCCI-INSPIRED MINIMALIST DESIGN
   Ultra Clean & Elegant
   =================================== */

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

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: #1a1a1a;
    background-color: #FFFFFF;
    font-weight: 400;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: #000000;
}

h1 {
    font-size: 42px;
    line-height: 1.3;
    font-weight: 700;
}

h2 {
    font-size: 32px;
    margin-bottom: 40px;
    font-weight: 600;
    line-height: 1.3;
}

h3 {
    font-size: 18px;
    margin-bottom: 10px;
    font-weight: 600;
}

p {
    font-size: 15px;
    line-height: 1.8;
    color: #555555;
}

/* ===================================
   LAYOUT
   =================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

section {
    padding: 60px 0;
}

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

.site-header {
    position: fixed;
    top: -100px;
    left: 0;
    right: 0;
    background-color: #FFFFFF;
    border-bottom: 1px solid #E5E5E5;
    padding: 20px 0;
    z-index: 1000;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
}

.site-header.scrolled {
    top: 0;
    opacity: 1;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #000000;
    text-decoration: none;
    transition: all 0.3s ease;
    opacity: 0;
}

.site-logo.visible {
    opacity: 1;
}

.site-nav {
    display: flex;
    gap: 30px;
    list-style: none;
}

.site-nav a {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: #000000;
    text-decoration: none;
    transition: all 0.3s ease;
}

.site-nav a:hover {
    opacity: 0.6;
}

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

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

/* Hero Background Slideshow */
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 2s ease-in-out;
}

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

/* Overlay tối để chữ dễ đọc */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.hero-content {
    max-width: 600px;
    position: relative;
    z-index: 2;
}

.hero-headline {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 64px;
    font-weight: 400;
    letter-spacing: 0.2em;
    margin-bottom: 60px;
    line-height: 1;
    color: #FFFFFF;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.6);
    transition: opacity 0.5s ease;
    white-space: nowrap;
}

.hero-headline.fade-out {
    opacity: 0;
}

.hero-subheadline {
    font-size: 18px;
    color: #FFFFFF;
    line-height: 1.7;
    margin-bottom: 40px;
    font-weight: 400;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.7);
}

/* ===================================
   BUTTONS
   =================================== */

.cta-button,
.product-cta,
.submit-button {
    display: inline-block;
    padding: 16px 48px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #FFFFFF;
    background-color: transparent;
    border: 2px solid #FFFFFF;
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.5s ease;
    font-family: inherit;
}

.cta-button.hidden {
    opacity: 0;
    pointer-events: none;
}

.product-cta,
.submit-button {
    background-color: #000000;
    border-color: #000000;
    position: relative;
    bottom: auto;
    left: auto;
    transform: none;
}

.cta-button:hover {
    background-color: #FFFFFF;
    color: #000000;
}

.product-cta:hover,
.submit-button:hover {
    background-color: #FFFFFF;
    color: #000000;
}

.product-cta {
    width: 100%;
    margin-top: 15px;
}

.submit-button {
    width: 100%;
    padding: 18px;
    font-size: 15px;
}

/* ===================================
   PRODUCT CATALOG
   =================================== */

.product-catalog-section {
    background-color: #FFFFFF;
    padding: 80px 0;
}

.product-catalog-section h2 {
    text-align: center;
    margin-bottom: 60px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.product-card {
    background-color: #FFFFFF;
    text-align: center;
}

.product-image {
    width: 100%;
    aspect-ratio: 3 / 4;
    background-color: #F8F8F8;
    margin-bottom: 20px;
    overflow: hidden;
    position: relative;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.03);
}

.product-name {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.01em;
    margin-bottom: 12px;
    color: #000000;
    line-height: 1.3;
}

.product-description {
    font-size: 15px;
    color: #555555;
    margin-bottom: 16px;
    line-height: 1.7;
    min-height: 50px;
}

.product-price {
    display: block;
    font-size: 22px;
    font-weight: 700;
    color: #000000;
    margin-bottom: 18px;
    letter-spacing: 0;
}

/* ===================================
   COMMITMENT SECTION
   =================================== */

.commitment-section {
    background-color: #FAFAFA;
    padding: 60px 0;
}

.commitment-section h2 {
    text-align: center;
    margin-bottom: 50px;
}

.commitment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

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

.commitment-item h3 {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 12px;
    color: #000000;
}

.commitment-item p {
    font-size: 14px;
    color: #555555;
    line-height: 1.7;
}

/* ===================================
   ORDER FORM
   =================================== */

.order-form-section {
    background-color: #FFFFFF;
    padding: 80px 0;
}

.order-form-section h2 {
    text-align: center;
    margin-bottom: 50px;
}

.order-form {
    max-width: 500px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 10px;
    color: #000000;
}

.required {
    color: #000000;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    font-family: inherit;
    border: 2px solid #DDDDDD;
    background-color: #FFFFFF;
    color: #000000;
    transition: border-color 0.2s;
    border-radius: 2px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #000000;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.error-message {
    display: block;
    color: #DC2626;
    font-size: 13px;
    margin-top: 8px;
    min-height: 18px;
    font-weight: 500;
}

.form-message {
    margin-top: 20px;
    padding: 16px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    display: none;
    border-radius: 4px;
}

.form-message.success {
    background-color: #F0F8F0;
    color: #2D5016;
    border: 1px solid #C3E6CB;
}

.form-message.error {
    background-color: #FFF0F0;
    color: #721C24;
    border: 1px solid #F5C6CB;
}

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

.footer {
    background-color: #000000;
    color: #FFFFFF;
    padding: 50px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-bottom: 15px;
    color: #FFFFFF;
}

.footer-section p {
    font-size: 14px;
    line-height: 1.7;
    color: #CCCCCC;
    margin-bottom: 8px;
}

.footer-section a {
    color: #CCCCCC;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: #FFFFFF;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333333;
}

.footer-bottom p {
    font-size: 13px;
    color: #999999;
    letter-spacing: 0.02em;
}

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

/* Tablet */
@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }
    
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .commitment-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    body {
        font-size: 15px;
        -webkit-tap-highlight-color: transparent;
    }
    
    .container {
        padding: 0 20px;
    }
    
    section {
        padding: 40px 0;
    }
    
    /* Form optimization for mobile */
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px;
        padding: 16px;
    }
    
    .form-group label {
        font-size: 14px;
    }
    
    .hero-section {
        min-height: 100vh;
        padding: 40px 20px;
    }
    
    .hero-headline {
        font-size: 28px;
        letter-spacing: 0.12em;
        margin-bottom: 30px;
    }
    
    .hero-section {
        min-height: 100vh;
    }
    
    .site-logo {
        font-size: 16px;
        letter-spacing: 0.06em;
    }
    
    .hero-subheadline {
        font-size: 16px;
    }
    
    h2 {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    h3 {
        font-size: 17px;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .product-name {
        font-size: 18px;
    }
    
    .product-price {
        font-size: 20px;
    }
    
    .product-image {
        margin-bottom: 16px;
    }
    
    .product-catalog-section,
    .order-form-section {
        padding: 50px 0 80px 0;
    }
    
    .product-card {
        padding-bottom: 20px;
    }
    
    .commitment-section,
    .review-section,
    .quick-order-section {
        padding: 40px 0;
    }
    
    .site-nav {
        display: none;
    }
    
    .cta-button {
        padding: 16px 40px;
        font-size: 14px;
        width: auto;
    }
    
    .product-cta,
    .submit-button {
        padding: 16px 36px;
        font-size: 15px;
    }
}

/* ===================================
   UTILITIES
   =================================== */

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

.hidden {
    display: none;
}

/* Remove sections we don't need */
.brand-intro-section {
    display: none;
}

/* Show reviews but compact */
.review-section {
    display: block;
    background-color: #FFFFFF;
    padding: 60px 0;
}

/* ===================================
   PRODUCT BADGES & RATINGS
   =================================== */

.product-card {
    position: relative;
}

.product-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background-color: #FF4444;
    color: #FFFFFF;
    padding: 7px 14px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(255, 68, 68, 0.3);
}

.product-badge.bestseller {
    background-color: #FFD700;
    color: #000000;
}

.product-badge.sale {
    background-color: #FF4444;
}

.product-badge.hot {
    background-color: #FF6B35;
}

.product-rating {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
}

.stars {
    color: #FFD700;
    font-size: 16px;
    letter-spacing: 2px;
}

.rating-count {
    font-size: 13px;
    color: #999999;
}

.product-sold {
    font-size: 13px;
    color: #666666;
    margin-bottom: 14px;
    line-height: 1.5;
}

/* ===================================
   QUICK ORDER BUTTONS
   =================================== */

.quick-order-section {
    background-color: #000000;
    padding: 40px 0;
    text-align: center;
}

.quick-order-section h2 {
    color: #FFFFFF;
    margin-bottom: 30px;
}

.quick-order-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.quick-order-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.quick-order-btn.messenger {
    background: linear-gradient(135deg, #00B2FF 0%, #006AFF 100%);
    color: #FFFFFF;
}

.quick-order-btn.zalo {
    background: linear-gradient(135deg, #0068FF 0%, #0180FF 100%);
    color: #FFFFFF;
}

.quick-order-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* ===================================
   COMPACT REVIEWS
   =================================== */

.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.review-card {
    background-color: #FAFAFA;
    padding: 24px;
    border-left: 3px solid #000000;
}

.review-rating {
    color: #FFD700;
    font-size: 16px;
    margin-bottom: 12px;
}

.review-text {
    font-size: 14px;
    color: #555555;
    line-height: 1.7;
    margin-bottom: 12px;
    font-style: normal;
}

.review-author {
    font-size: 13px;
    color: #000000;
    font-weight: 600;
}

/* ===================================
   SOCIAL MEDIA ICONS
   =================================== */

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #FFFFFF;
    color: #000000;
    border-radius: 50%;
    text-decoration: none;
    font-size: 18px;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: #FFD700;
    transform: translateY(-3px);
}

/* ===================================
   RESPONSIVE UPDATES
   =================================== */

@media (max-width: 1024px) {
    .review-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .quick-order-buttons {
        flex-direction: column;
        align-items: stretch;
        padding: 0 20px;
    }
    
    .quick-order-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ===================================
   MOBILE STICKY ORDER BUTTON
   =================================== */

.mobile-sticky-order {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 16px 24px;
    border-top: 1px solid #E5E5E5;
    z-index: 999;
    opacity: 0;
    transform: translateY(100%);
    transition: all 0.3s ease;
}

.mobile-sticky-order.visible {
    opacity: 1;
    transform: translateY(0);
}

.mobile-order-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    background: #000000;
    color: #FFFFFF;
    text-decoration: none;
    border-radius: 0;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: 2px solid #000000;
}

.mobile-order-btn span:first-child {
    display: none;
}

.mobile-order-btn:active {
    background: #FFFFFF;
    color: #000000;
}

@media (max-width: 768px) {
    .mobile-sticky-order {
        display: block;
    }
    
    /* Touch-friendly tap targets */
    a, button {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Prevent text selection on buttons */
    .product-cta,
    .submit-button,
    .mobile-order-btn,
    .cta-button {
        -webkit-user-select: none;
        user-select: none;
        -webkit-touch-callout: none;
    }
}

/* ===================================
   CLICK TO CALL BUTTON
   =================================== */

.click-to-call {
    display: none;
    position: fixed;
    bottom: 100px;
    right: 20px;
    width: 56px;
    height: 56px;
    background: #000000;
    color: #FFFFFF;
    border-radius: 50%;
    text-decoration: none;
    font-size: 24px;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 998;
    transition: all 0.3s ease;
    border: 1px solid #E5E5E5;
    opacity: 0;
    transform: scale(0.8);
}

.click-to-call.visible {
    opacity: 1;
    transform: scale(1);
}

.click-to-call:active {
    transform: scale(0.95);
    background: #333333;
}

@media (max-width: 768px) {
    .click-to-call {
        display: flex;
    }
}

/* ===================================
   BACK TO TOP BUTTON
   =================================== */

.back-to-top {
    display: none;
    position: fixed;
    bottom: 170px;
    right: 20px;
    width: 48px;
    height: 48px;
    background-color: rgba(255, 255, 255, 0.95);
    color: #000000;
    border: 1px solid #E5E5E5;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 997;
    transition: all 0.3s ease;
    opacity: 0;
    pointer-events: none;
}

.back-to-top.visible {
    display: flex;
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:active {
    background-color: #F5F5F5;
    transform: scale(0.95);
}