/* ==========================================
   CSS VARIABLES & RESET
   ========================================== */
:root {
    --green-900: #0d3b1e;
    --green-800: #145a2e;
    --green-700: #1a6e3a;
    --green-600: #1e8245;
    --green-500: #22964f;
    --green-400: #34a85f;
    --green-300: #5bc67e;
    --green-200: #a0ddb5;
    --green-100: #d4f0de;
    --green-50:  #eef9f1;

    --gray-900: #1a1a1a;
    --gray-800: #2d2d2d;
    --gray-700: #404040;
    --gray-600: #595959;
    --gray-500: #737373;
    --gray-400: #8c8c8c;
    --gray-300: #b3b3b3;
    --gray-200: #d9d9d9;
    --gray-100: #f0f0f0;
    --gray-50:  #fafafa;

    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Roboto', sans-serif;
    color: var(--gray-700);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-xl);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--green-600);
    color: var(--white);
    border-color: var(--green-600);
}
.btn-primary:hover {
    background: var(--green-700);
    border-color: var(--green-700);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(30, 130, 69, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}
.btn-outline:hover {
    background: var(--white);
    color: var(--green-700);
    transform: translateY(-2px);
}

/* ==========================================
   SECTION LABELS & TITLES
   ========================================== */
.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--green-600);
    margin-bottom: 12px;
    position: relative;
    padding-left: 40px;
}
.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 28px;
    height: 2px;
    background: var(--green-600);
}
.section-label.center {
    display: block;
    text-align: center;
    padding-left: 0;
}
.section-label.center::before { display: none; }
.section-label.light { color: var(--green-200); }
.section-label.light::before { background: var(--green-200); }

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 40px;
    font-weight: 700;
    color: var(--green-900);
    line-height: 1.2;
    margin-bottom: 20px;
}
.section-title.center { text-align: center; }
.section-title.light { color: var(--white); }

.section-desc {
    text-align: center;
    color: var(--gray-500);
    font-size: 17px;
    max-width: 600px;
    margin: 0 auto 50px;
}

.section-header { margin-bottom: 20px; }

/* ==========================================
   HEADER
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
    padding: 8px 0;
}

.header.scrolled {
    background: rgba(13, 59, 30, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.15);
    padding: 4px 0;
}

.header-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--green-500);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--white);
    box-shadow: 0 2px 10px rgba(34, 150, 79, 0.3);
    overflow: hidden;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.logo-text h1 {
    font-size: 14px;
    font-weight: 700;
    color: var(--white);
    line-height: 1.3;
    letter-spacing: 0.5px;
}
.logo-text p {
    font-size: 10px;
    color: var(--green-200);
    font-style: italic;
}

.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 14px;
    font-size: 12.5px;
    font-weight: 600;
    color: rgba(255,255,255,0.85);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-sm);
    position: relative;
    white-space: nowrap;
}
.nav-link:hover {
    color: var(--white);
    background: rgba(34, 150, 79, 0.45);
}

.nav-link.active {
    color: #ffffff !important;
    background: linear-gradient(135deg, #22964f 0%, #1b7a3e 100%) !important;
    box-shadow: 0 4px 12px rgba(34, 150, 79, 0.42);
    font-weight: 700;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 50%;
    transform: translateX(-50%);
    width: 65%;
    height: 3px;
    background: #ffd54f;
    border-radius: 3px;
}

/* Header Dropdown Menu (Phát triển bền vững - EUDR) */
.nav-dropdown {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.nav-dropdown > .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-dropdown-caret {
    font-size: 10px;
    transition: transform 0.25s ease;
    opacity: 0.85;
}

.nav-dropdown:hover .nav-dropdown-caret,
.nav-dropdown.open .nav-dropdown-caret {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 300px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 14px 38px rgba(0, 0, 0, 0.22);
    border: 1px solid rgba(27, 94, 32, 0.14);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.22s ease;
    z-index: 1500;
}

.nav-dropdown::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -10px;
    height: 10px;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 10px 13px;
    color: #1c3120 !important;
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.18s ease;
    white-space: normal;
    line-height: 1.35;
}

.nav-dropdown-item i {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: #e8f5e9;
    color: #1b5e20;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
}

.nav-dropdown-item:hover {
    background: #e8f5e9;
    color: #1b5e20 !important;
    transform: translateX(3px);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
}
.lang { cursor: pointer; transition: var(--transition); }
.lang.active { color: var(--white); }
.lang:hover { color: var(--white); }
.lang-divider { color: rgba(255,255,255,0.3); }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==========================================
   HERO
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        url('https://images.unsplash.com/photo-1448375240586-882707db888b?w=1600&h=900&fit=crop')
        center/cover no-repeat;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.25) 0%,
        rgba(0, 0, 0, 0.12) 50%,
        rgba(0, 0, 0, 0.35) 100%
    );
    transition: background 0.3s ease, opacity 0.3s ease;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 28px 36px;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(3px);
}

.hero-title {
    font-family: 'Playfair Display', serif;
    font-size: 72px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    line-height: 1.1;
    text-shadow: 0 4px 24px rgba(0,0,0,0.65);
}

.hero-subtitle {
    font-size: 22px;
    color: #e8f5e9;
    font-weight: 400;
    margin-bottom: 40px;
    letter-spacing: 2px;
    text-shadow: 0 2px 14px rgba(0,0,0,0.65);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}
.hero-scroll a {
    display: flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    color: var(--white);
    font-size: 14px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-img-collage {
    position: relative;
    height: 480px;
}

.about-img-main {
    position: absolute;
    top: 0;
    left: 0;
    width: 75%;
    height: 70%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.about-img-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-img-secondary {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 55%;
    height: 50%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 5px solid var(--white);
}
.about-img-secondary img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-img-accent {
    position: absolute;
    top: 50%;
    left: 60%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    border: 5px solid var(--white);
    box-shadow: var(--shadow-lg);
    z-index: 2;
}
.about-img-accent img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text {
    margin-bottom: 32px;
}
.about-text p {
    margin-bottom: 16px;
    font-size: 16px;
    color: var(--gray-600);
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 32px;
    padding: 24px 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
}

.stat-item { text-align: center; }
.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 42px;
    font-weight: 700;
    color: var(--green-600);
    line-height: 1;
    margin-bottom: 6px;
}
.stat-number::after { content: '+'; font-size: 28px; }
.stat-label {
    font-size: 13px;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

/* ==========================================
   FIELDS SECTION
   ========================================== */
.fields { background: var(--green-50); }

.fields-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.field-card {
    background: var(--white);
    padding: 40px 28px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--gray-100);
    position: relative;
    overflow: hidden;
}
.field-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--green-400), var(--green-600));
    transform: scaleX(0);
    transition: var(--transition);
}
.field-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.field-card:hover::before { transform: scaleX(1); }

.field-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--green-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--green-600);
    transition: var(--transition);
}
.field-card:hover .field-icon {
    background: var(--green-600);
    color: var(--white);
    transform: scale(1.1);
}

.field-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--green-900);
    margin-bottom: 12px;
    line-height: 1.5;
}

.field-card p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ==========================================
   PRODUCTS SECTION
   ========================================== */
.products { background: var(--white); }

.products-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
    align-items: center;
}

.product-slider {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    aspect-ratio: 7/5;
}

.product-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.6s ease;
}
.product-slide.active { opacity: 1; position: relative; }
.product-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.product-slide-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 24px;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: var(--white);
    font-size: 18px;
    font-weight: 600;
}

.slider-dots {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}
.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gray-300);
    cursor: pointer;
    transition: var(--transition);
}
.dot.active {
    background: var(--green-600);
    width: 30px;
    border-radius: 5px;
}

.product-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 28px 0 32px;
}
.product-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--gray-700);
}
.product-item i {
    color: var(--green-500);
    font-size: 18px;
}

/* ==========================================
   QUALITY SECTION
   ========================================== */
.quality {
    position: relative;
    background:
        url('https://images.unsplash.com/photo-1511497584788-876760111969?w=1600&h=900&fit=crop')
        center/cover no-repeat fixed;
}

.quality-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(13, 59, 30, 0.92) 0%,
        rgba(20, 90, 46, 0.88) 100%
    );
}

.quality .container { position: relative; z-index: 2; }

.quality-text {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
    color: var(--green-100);
    font-size: 17px;
    line-height: 1.8;
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.quality-item {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius-md);
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(4px);
    transition: var(--transition);
}
.quality-item:hover {
    background: rgba(255,255,255,0.14);
    transform: translateY(-6px);
}

.quality-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--green-300);
}

.quality-item h4 {
    color: var(--white);
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 10px;
}
.quality-item p {
    color: var(--green-200);
    font-size: 14px;
    line-height: 1.6;
}

/* ==========================================
   NEWS SECTION
   ========================================== */
.news { background: var(--gray-50); }

.home-news-pills {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.home-news-pill {
    padding: 10px 24px;
    border-radius: var(--radius-xl);
    background: var(--green-100);
    color: var(--green-800);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}
.home-news-pill:hover,
.home-news-pill.active {
    background: var(--green-600);
    color: var(--white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.news-img {
    position: relative;
    height: 220px;
    overflow: hidden;
}
.news-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}
.news-card:hover .news-img img { transform: scale(1.08); }

.news-date {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--green-600);
    color: var(--white);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    text-align: center;
    line-height: 1.2;
}
.news-date .day {
    display: block;
    font-size: 22px;
    font-weight: 700;
}
.news-date .month {
    display: block;
    font-size: 11px;
    font-weight: 400;
    opacity: 0.85;
}

.news-body { padding: 24px; }

.news-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--green-600);
    background: var(--green-50);
    padding: 4px 12px;
    border-radius: var(--radius-xl);
    margin-bottom: 12px;
}

.news-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--green-900);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-body p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}

.news-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--green-600);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.news-link:hover {
    color: var(--green-700);
    gap: 10px;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--green-900);
    color: var(--green-200);
}

.footer-top { padding: 60px 0 40px; }

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
    gap: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}
.footer-logo .logo-icon {
    width: 42px;
    height: 42px;
    font-size: 18px;
    flex-shrink: 0;
}
.footer-logo h3 {
    font-size: 15px;
    color: var(--white);
    font-weight: 600;
    line-height: 1.3;
}

.footer-about > p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    color: var(--green-300);
}

.footer-social {
    display: flex;
    gap: 10px;
}
.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--green-300);
    font-size: 16px;
    transition: var(--transition);
}
.footer-social a:hover {
    background: var(--green-500);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--green-500);
}

.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
    font-size: 14px;
    color: var(--green-300);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.footer-col ul a::before {
    content: '›';
    font-size: 18px;
    color: var(--green-500);
}
.footer-col ul a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer-contact { display: flex; flex-direction: column; gap: 14px; }
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 13px;
    color: var(--green-300);
}
.contact-item i {
    color: var(--green-500);
    font-size: 14px;
    margin-top: 4px;
    width: 16px;
    flex-shrink: 0;
}

.footer-newsletter-text {
    font-size: 14px;
    color: var(--green-300);
    margin-bottom: 16px;
}

.footer-newsletter {
    display: flex;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.15);
}
.footer-newsletter input {
    flex: 1;
    padding: 12px 18px;
    background: rgba(255,255,255,0.06);
    border: none;
    color: var(--white);
    font-size: 14px;
    outline: none;
}
.footer-newsletter input::placeholder { color: var(--green-300); opacity: 0.6; }
.footer-newsletter button {
    padding: 12px 20px;
    background: var(--green-600);
    border: none;
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
    font-size: 15px;
}
.footer-newsletter button:hover { background: var(--green-500); }

.footer-bottom {
    padding: 20px 0;
    border-top: 1px solid rgba(255,255,255,0.08);
    text-align: center;
    font-size: 13px;
    color: var(--green-300);
    opacity: 0.7;
}

/* ==========================================
   BACK TO TOP
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--green-600);
    color: var(--white);
    border: none;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--green-700);
    transform: translateY(-4px);
}

/* ==========================================
   ANIMATIONS (AOS-like, pure CSS)
   ========================================== */
[data-aos] {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}
[data-aos="fade-up"] { transform: translateY(40px); }
[data-aos="fade-right"] { transform: translateX(-40px); }
[data-aos="fade-left"] { transform: translateX(40px); }
[data-aos].aos-animate {
    opacity: 1;
    transform: translate(0);
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
    .nav { display: none; }
    .hamburger { display: flex; }

    .nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(13, 59, 30, 0.97);
        backdrop-filter: blur(12px);
        padding: 16px 24px;
        gap: 0;
    }
    .nav.open .nav-link {
        padding: 14px 16px;
        border-bottom: 1px solid rgba(255,255,255,0.05);
        border-radius: 0;
    }

    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-img-collage { height: 350px; }
    .fields-grid { grid-template-columns: repeat(2, 1fr); }
    .products-layout { grid-template-columns: 1fr; gap: 40px; }
    .quality-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .section { padding: 60px 0; }
    .hero-title { font-size: 42px; }
    .hero-subtitle { font-size: 16px; }
    .section-title { font-size: 30px; }
    .fields-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .quality-grid { grid-template-columns: 1fr; }
    .about-stats { gap: 20px; }
    .stat-number { font-size: 32px; }
    .footer-grid { grid-template-columns: 1fr; }
    .about-img-collage { height: 280px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 32px; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .btn { padding: 12px 24px; font-size: 14px; width: 100%; justify-content: center; }
    .logo-text h1 { font-size: 12px; }
    .about-stats { flex-direction: column; gap: 16px; }
}