/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Earth Tone Color Palette */
    --primary-color: #5D4E37;        /* Dark Brown - Màu nâu đất đậm */
    --secondary-color: #8B7355;      /* Medium Brown - Màu nâu vừa */
    --accent-color: #A0826D;         /* Light Brown - Màu nâu nhạt */
    --earth-green: #6B8E23;          /* Olive Green - Màu xanh ô liu */
    --earth-orange: #CD853F;         /* Peru Orange - Màu cam đất */
    --text-color: #3E3021;           /* Dark Earth Text - Màu text nâu đậm */
    --light-bg: #F5F0E8;             /* Cream Beige - Màu be kem */
    --white: #ffffff;
    --gray: #7A6F5D;                 /* Warm Gray - Màu xám ấm */
    --light-gray: #E8E1D5;           /* Light Beige - Màu be nhạt */
    --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;
}

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

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

.navbar {
    padding: 1rem 0;
}

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

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

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

/* Banner Section with Slider */
.banner {
    margin-top: 80px;
    height: 600px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.8s ease-in-out;
}

.banner-slide.active {
    opacity: 1;
    transform: translateX(0);
}

.banner-slide.prev {
    transform: translateX(-100%);
    opacity: 0;
}

.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

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

.indicator.active {
    background: var(--white);
    width: 30px;
    border-radius: 6px;
}

.banner-overlay {
    position: relative;
    z-index: 2;
    width: 100%;
}

.banner-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.banner-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.banner-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s;
    animation-fill-mode: both;
}

.banner-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s;
    animation-fill-mode: both;
}

/* Buttons */
.btn {
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--earth-green);
    border-color: var(--earth-green);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
    border-color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

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

/* About Section */
.about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.about-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--gray);
}

.about-features {
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--earth-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.feature-text h4 {
    color: var(--primary-color);
    margin-bottom: 0.3rem;
}

.feature-text p {
    color: var(--gray);
    font-size: 0.9rem;
    margin: 0;
}

/* Video Section */
.about-video {
    position: relative;
}

.about-video video {
    width: 100%;
    height: 400px;
    border-radius: 15px;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-video .video-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    gap: 10px;
}

.about-video .video-placeholder small {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Production Section */
.production {
    background: var(--light-bg);
}

.production-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    color: var(--gray);
}

.production-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-item {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}


.step-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--earth-green), var(--earth-orange));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.step-item:hover::before {
    transform: scaleX(1);
}

.step-item:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.step-item:active {
    transform: translateY(-12px) scale(0.98);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.18);
}


.step-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    line-height: 1.4;
    letter-spacing: -0.02em;
}

.step-item p {
    color: var(--gray);
    line-height: 1.7;
    font-size: 1rem;
    margin: 0;
}

/* Products Section */
.products {
    background: var(--white);
}

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

.product-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
}


.product-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.product-card:active {
    transform: translateY(-12px) scale(0.98);
}


.product-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: #2c3e50;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.product-image .image-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
}

.product-info {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
}

.product-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
    text-align: center;
    line-height: 1.4;
    letter-spacing: -0.02em;
}



/* Contact Section */
.contact {
    background: var(--light-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info h3,
.contact-form-wrapper h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.info-icon {
    font-size: 1.8rem;
    width: 50px;
    height: 50px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.info-text h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.info-text p {
    color: var(--gray);
    margin: 0;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

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

.form-group textarea {
    resize: vertical;
}

.contact-form .btn-primary {
    width: 100%;
    background: var(--earth-green);
    color: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.contact-form .btn-primary:hover {
    background: var(--earth-orange);
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h3,
.footer-col h4 {
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-col p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.8rem;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--white);
    margin: auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    color: var(--gray);
    font-size: 35px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--white);
    background: var(--accent-color);
    transform: rotate(90deg);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--earth-green) 100%);
    color: var(--white);
    padding: 2.5rem 2.5rem;
    border-radius: 20px 20px 0 0;
    text-align: center;
}

.modal-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: none;
}

.modal-title {
    font-size: 2rem;
    margin: 0;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.modal-body {
    padding: 2.5rem;
    color: var(--text-color);
}

.modal-body p {
    line-height: 1.8;
    margin: 1.5rem 0;
    font-size: 1rem;
}

.modal-body ul {
    list-style: none;
    padding-left: 0;
    margin: 1.5rem 0;
}

.modal-body li {
    padding: 0.8rem 0;
    padding-left: 2.2rem;
    position: relative;
    color: var(--text-color);
    line-height: 1.7;
    font-size: 1rem;
}

.modal-body li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--earth-green);
    font-weight: bold;
    font-size: 1.3rem;
}

.modal-body strong {
    color: var(--primary-color);
    font-size: 1.15rem;
    font-weight: 600;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.1);
        padding: 2rem 0;
    }

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

    .banner {
        height: 500px;
    }

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

    .banner-subtitle {
        font-size: 1.1rem;
    }

    .banner-buttons {
        flex-direction: column;
        align-items: center;
    }

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

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

    .production-steps {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .banner-title {
        font-size: 1.5rem;
    }

    .banner-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }

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