/* ==========================================
   CSS VARIABLES
   ========================================== */
   :root {
    /* Colors */
    --primary-green: #3ba66b;
    --dark-green: #2d8a54;
    --light-green: #e8f5e9;
    --earth-brown: #8b6f47;
    --sky-blue: #4a90e2;
    --white: #ffffff;
    --black: #000000;
    --text-dark: #333333;
    --text-light: #666666;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --border-gray: #dddddd;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    --font-size-xxxl: 48px;
    
    /* Border Radius */
    --radius: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

ul {
    list-style: none;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-green), var(--sky-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.text-primary {
    color: var(--primary-green);
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
}

.btn-outline:hover {
    background: var(--primary-green);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ==========================================
   NAVIGATION
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: var(--z-fixed);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-green);
}

.logo i {
    font-size: 28px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-green);
    transition: var(--transition);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    color: var(--primary-green);
    font-size: 24px;
    padding: 8px;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 20px 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 50%, #a5d6a7 100%);
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(59, 166, 107, 0.1) 0%, transparent 50%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-green);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.hero-title {
    font-size: var(--font-size-xxxl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.stat-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-green);
    border-radius: var(--radius);
    color: var(--primary-green);
    font-size: 24px;
}

.stat-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    height: 500px;
    animation: fadeIn 1.5s ease;
}

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

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.floating-card i {
    font-size: 32px;
    color: var(--primary-green);
}

.floating-card strong {
    display: block;
    font-size: var(--font-size-base);
    color: var(--text-dark);
}

.floating-card p {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 40%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 2s;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 24px;
    color: var(--primary-green);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ==========================================
   SECTION STYLES
   ========================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--light-green);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 16px;
}

.section-title {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about-section {
    padding: 100px 20px;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: var(--font-size-xl);
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: var(--text-light);
}

.about-features {
    margin: 32px 0;
}

.about-feature {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-green);
    border-radius: var(--radius);
    color: var(--primary-green);
    font-size: 20px;
    flex-shrink: 0;
}

.feature-text strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.feature-text p {
    margin: 0;
    font-size: var(--font-size-sm);
}

.about-cta {
    display: flex;
    gap: 16px;
    margin-top: 32px;
}

.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.visual-card {
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    flex: 1;
}

.visual-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-green);
    border-radius: var(--radius-lg);
    color: var(--primary-green);
    font-size: 32px;
}

.visual-card h4 {
    font-size: var(--font-size-lg);
    color: var(--text-dark);
    margin-bottom: 8px;
}

.visual-card p {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin: 0;
}

.visual-arrow {
    font-size: 24px;
    color: var(--primary-green);
}

/* ==========================================
   FEATURES SECTION
   ========================================== */
.features-section {
    padding: 100px 20px;
    background: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 32px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon-wrapper {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-green);
    border-radius: var(--radius-lg);
    color: var(--primary-green);
    font-size: 32px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    color: var(--text-dark);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.feature-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-green);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.feature-link:hover {
    gap: 12px;
}

/* ==========================================
   TREES SECTION
   ========================================== */
.trees-section {
    padding: 100px 20px;
    background: var(--white);
}

.trees-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--white);
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-full);
    color: var(--text-dark);
    font-weight: 600;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-green);
    color: var(--white);
    border-color: var(--primary-green);
}

.trees-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.tree-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.tree-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.tree-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--primary-green);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    z-index: 1;
}

.tree-badge.premium {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: var(--text-dark);
}

.tree-badge.adopted {
    background: var(--earth-brown);
}

.tree-image {
    height: 200px;
    background: linear-gradient(135deg, var(--light-green), var(--primary-green));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: var(--white);
}

.tree-content {
    padding: 24px;
}

.tree-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.tree-header h3 {
    font-size: var(--font-size-lg);
    color: var(--text-dark);
}

.tree-age {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

.tree-info {
    margin-bottom: 16px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

.info-item i {
    color: var(--primary-green);
}

.tree-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--light-gray);
    border-radius: var(--radius);
}

.stat {
    display: flex;
    align-items: center;
    gap: 8px;
}

.stat i {
    font-size: 20px;
    color: var(--primary-green);
}

.stat strong {
    display: block;
    font-size: var(--font-size-base);
    color: var(--text-dark);
}

.stat span {
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

.tree-price {
    text-align: center;
    padding: 16px;
    background: var(--light-green);
    border-radius: var(--radius);
    margin-bottom: 16px;
}

.price-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: 4px;
}

.price-amount {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 4px;
}

.price-note {
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

.adopted-by {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: var(--light-gray);
    border-radius: var(--radius);
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: 16px;
}

.adopted-by i {
    font-size: 20px;
    color: var(--primary-green);
}

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

/* ==========================================
   MAP SECTION - CLICK TO TOGGLE VERSION
   ========================================== */
.map-section {
    padding: 100px 20px;
    background: var(--light-gray);
}

.map-container {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 600px;
    position: relative;
}

.map-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--primary-green);
    position: relative;
}

.map-placeholder > i {
    font-size: 100px;
    margin-bottom: 20px;
    opacity: 0.2;
}

.map-placeholder > p {
    font-size: 20px;
    font-weight: 500;
    opacity: 0.4;
}

/* Farm Markers - Enhanced */
.farm-marker {
    position: absolute;
    font-size: 36px;
    color: var(--primary-green);
    cursor: pointer;
    transition: var(--transition);
    animation: markerPulse 2s ease-in-out infinite;
    z-index: 10;
    user-select: none;
}

@keyframes markerPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.farm-marker:hover {
    transform: scale(1.2) !important;
    color: var(--dark-green);
    animation: none;
}

.farm-marker:active {
    transform: scale(1.1) !important;
}

/* Active state khi tooltip mở */
.farm-marker.active {
    transform: scale(1.3) !important;
    color: var(--dark-green);
    z-index: 100;
    animation: none;
}

/* Marker Tooltip - Click Version */
.marker-tooltip {
    position: absolute;
    bottom: calc(100% + 20px);
    left: 50%;
    transform: translateX(-50%) translateY(-20px) scale(0.9);
    background: var(--white);
    padding: 25px;
    padding-top: 35px;
    border-radius: var(--radius-lg);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.25);
    min-width: 290px;
    max-width: 320px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
    pointer-events: none;
    border: 2px solid var(--primary-green);
}

/* Tooltip active state */
.marker-tooltip.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0) scale(1);
    pointer-events: auto;
}

/* Close button */
.tooltip-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    background: var(--light-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-dark);
    border: none;
    z-index: 1;
}

.tooltip-close:hover {
    background: var(--primary-green);
    color: var(--white);
    transform: rotate(90deg);
}

/* Arrow tooltip */
.marker-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 14px solid transparent;
    border-top-color: var(--primary-green);
    filter: drop-shadow(0 3px 3px rgba(0, 0, 0, 0.1));
}

.marker-tooltip::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 12px solid transparent;
    border-top-color: var(--white);
    z-index: 1;
    margin-top: -2px;
}

/* Tooltip content */
.tooltip-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--light-gray);
}

.tooltip-icon {
    font-size: 32px;
    color: var(--primary-green);
}

.tooltip-title {
    flex: 1;
}

.tooltip-title strong {
    display: block;
    color: var(--primary-green);
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 3px;
}

.tooltip-title span {
    display: block;
    color: var(--text-light);
    font-size: 12px;
}

.tooltip-body {
    margin-bottom: 15px;
}

.tooltip-info {
    margin: 10px 0;
    font-size: 14px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
    line-height: 1.6;
}

.tooltip-info i {
    color: var(--primary-green);
    font-size: 15px;
    min-width: 18px;
}

.tooltip-info strong {
    color: var(--text-dark);
    font-weight: 600;
}

/* Tooltip footer */
.tooltip-footer {
    display: flex;
    gap: 8px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--light-gray);
}

.tooltip-btn {
    flex: 1;
    padding: 10px 15px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

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

.tooltip-btn-primary:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.tooltip-btn-secondary {
    background: var(--light-gray);
    color: var(--text-dark);
}

.tooltip-btn-secondary:hover {
    background: var(--medium-gray);
}

/* Vị trí markers */
.marker-1 {
    top: 25%;
    left: 20%;
    animation-delay: 0s;
}

.marker-2 {
    top: 45%;
    right: 25%;
    animation-delay: 0.5s;
}

.marker-3 {
    bottom: 30%;
    left: 40%;
    animation-delay: 1s;
}

.marker-4 {
    top: 60%;
    right: 45%;
    animation-delay: 1.5s;
}

/* Overlay khi tooltip mở */
.map-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 5;
    backdrop-filter: blur(2px);
}

.map-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact-section {
    padding: 100px 20px;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: var(--font-size-xl);
    color: var(--text-dark);
    margin-bottom: 12px;
}

.contact-info > p {
    color: var(--text-light);
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-green);
    border-radius: var(--radius);
    color: var(--primary-green);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-text strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.contact-text p {
    color: var(--text-light);
    margin: 0;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-green);
    border-radius: var(--radius);
    color: var(--primary-green);
    font-size: 18px;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-green);
    color: var(--white);
    transform: translateY(-4px);
}

.contact-form-wrapper {
    background: var(--light-gray);
    padding: 40px;
    border-radius: var(--radius-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group label i {
    color: var(--primary-green);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius);
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(59, 166, 107, 0.1);
}

.form-submit {
    padding: 16px 32px;
    background: var(--primary-green);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.form-submit:hover {
    background: var(--dark-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 60px 20px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-logo i {
    font-size: 28px;
    color: var(--primary-green);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    color: var(--white);
    font-size: 18px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-green);
    transform: translateY(-4px);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    margin-bottom: 20px;
    color: var(--white);
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-green);
    padding-left: 8px;
}

.newsletter-form {
    display: flex;
    gap: 8px;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: var(--font-size-base);
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.newsletter-form button {
    padding: 12px 20px;
    background: var(--primary-green);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form button:hover {
    background: var(--dark-green);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-green);
}

/* ==========================================
   MODAL
   ========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-gray);
    border-radius: 50%;
    color: var(--text-dark);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1;
}

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

.modal-body {
    padding: 40px;
}

.modal-body h2 {
    font-size: var(--font-size-xl);
    color: var(--text-dark);
    margin-bottom: 12px;
}

.modal-body > p {
    color: var(--text-light);
    margin-bottom: 24px;
}

/* ==========================================
   NOTIFICATION
   ========================================== */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    background: var(--white);
    padding: 16px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: var(--z-tooltip);
    transform: translateX(400px);
    transition: var(--transition);
}

.notification.show {
    transform: translateX(0);
}

.notification i {
    font-size: 24px;
    color: var(--primary-green);
}

.notification.error i {
    color: #e74c3c;
}

.notification.info i {
    color: var(--sky-blue);
}

/* ==========================================
   SCROLL TO TOP
   ========================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: var(--z-fixed);
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--dark-green);
    transform: translateY(-4px);
}

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

/* Tablet */
@media (max-width: 1024px) {
    .hero-container,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-image {
        height: 400px;
    }
    
    .features-grid,
    .trees-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --font-size-xxxl: 36px;
        --font-size-xxl: 28px;
        --font-size-xl: 22px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 40px 20px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-actions .btn {
        display: none;
    }
    
    .hero {
        padding: 100px 20px 60px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .hero-image {
        display: none;
    }
    
    .visual-arrow {
        display: none;
    }
    
    .about-visual {
        flex-direction: column;
    }
    
    .features-grid,
    .trees-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .map-container {
        height: 450px;
    }
    
    .farm-marker {
        font-size: 30px;
    }
    
    .marker-tooltip {
        min-width: 260px;
        max-width: 90vw;
        padding: 20px;
        padding-top: 30px;
        left: 50%;
        right: auto;
        transform: translateX(-50%) translateY(-20px) scale(0.9);
    }
    
    .marker-tooltip.active {
        transform: translateX(-50%) translateY(0) scale(1);
    }
    
    .tooltip-header {
        flex-direction: column;
        text-align: center;
    }
    
    .tooltip-footer {
        flex-direction: column;
    }
    
    .tooltip-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .map-container {
        height: 400px;
    }
    
    .farm-marker {
        font-size: 26px;
    }
    
    .marker-tooltip {
        bottom: auto;
        top: calc(100% + 20px);
        transform: translateX(-50%) translateY(20px) scale(0.9);
    }
    
    .marker-tooltip.active {
        transform: translateX(-50%) translateY(0) scale(1);
    }
    
    .marker-tooltip::after {
        top: auto;
        bottom: 100%;
        border-top-color: transparent;
        border-bottom-color: var(--primary-green);
    }
    
    .marker-tooltip::before {
        top: auto;
        bottom: 100%;
        border-top-color: transparent;
        border-bottom-color: var(--white);
        margin-top: 0;
        margin-bottom: -2px;
    }
}

/* ==========================================
   ADVANCED ANIMATIONS FOR TOOLTIPS
   ========================================== */

/* Ripple effect khi click marker */
@keyframes ripple {
    0% {
        box-shadow: 0 0 0 0 rgba(59, 166, 107, 0.7);
    }
    100% {
        box-shadow: 0 0 0 20px rgba(59, 166, 107, 0);
    }
}

.farm-marker:active::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    animation: ripple 0.6s ease-out;
}

/* Shake animation cho marker khi có tooltip mở */
@keyframes shake {
    0%, 100% { transform: scale(1.3) translateX(0); }
    25% { transform: scale(1.3) translateX(-3px); }
    75% { transform: scale(1.3) translateX(3px); }
}

.farm-marker.active {
    animation: shake 0.5s ease-in-out;
}

/* Glow effect cho active marker */
.farm-marker.active::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(59, 166, 107, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
}

/* Tooltip entrance animation variants */
.marker-tooltip.active {
    animation: tooltipBounceIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes tooltipBounceIn {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(-30px) scale(0.8);
    }
    50% {
        transform: translateX(-50%) translateY(5px) scale(1.05);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

/* Pulse animation cho tooltip buttons */
@keyframes buttonPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.tooltip-btn-primary {
    animation: buttonPulse 2s ease-in-out infinite;
}

.tooltip-btn-primary:hover {
    animation: none;
}

/* Print styles */
@media print {
    .navbar,
    .scroll-top,
    .modal,
    .notification {
        display: none !important;
    }
}