/* Modern Portfolio CSS - Unified Design System */
/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-color: #2c5530;
    --secondary-color: #4a7c59;
    --accent-color: #7db46c;
    --light-green: #a8d8a8;
    --text-dark: #2d3748;
    --text-light: #718096;
    --background-light: #f7fafc;
    --white: #ffffff;
    --success-color: #48bb78;
    --error-color: #f56565;
    
    /* Shadows & Effects */
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
    --transition-slow: all 0.5s ease;
    
    /* Typography */
    --font-primary: 'Lato', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing System (8px grid) */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-light);
    font-weight: var(--font-weight-normal);
}

/* Typography System */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--primary-color);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--text-dark);
}

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

a:hover {
    color: var(--primary-color);
}

/* Layout Components */
.container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-2xl) 0;
}

.section-sm {
    padding: var(--space-xl) 0;
}

.section-lg {
    padding: var(--space-3xl) 0;
}

/* Navigation Styles */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 5%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(44, 85, 48, 0.1);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
}

.logo {
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-links li a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
    transition: var(--transition);
    position: relative;
    padding: var(--space-xs) 0;
}

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

.nav-links li a:hover::after,
.nav-links li a.active::after {
    width: 100%;
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--primary-color);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 2px;
}

/* Button System */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-semibold);
    transition: var(--transition);
    box-shadow: var(--shadow);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    border: none;
    font-family: inherit;
}

.btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
    color: var(--white);
}

/* Card System */
.card {
    background: var(--white);
    padding: var(--space-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
}

.card-content {
    color: var(--text-light);
    line-height: 1.7;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-auto-lg {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(rgba(44, 85, 48, 0.7), rgba(44, 85, 48, 0.5)), url('images/banner.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    padding: 0 5%;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 85, 48, 0.3);
    z-index: 1;
}

.hero-content {
    max-width: var(--container-xl);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-text h1 {
    font-size: 4rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    margin-bottom: var(--space-sm);
    line-height: 1.1;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-text h2 {
    font-size: 1.8rem;
    font-weight: var(--font-weight-normal);
    color: var(--light-green);
    margin-bottom: var(--space-md);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-text p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    max-width: 800px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-buttons {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

/* Page Headers */
.page-header {
    padding: 120px 5% var(--space-2xl);
    text-align: center;
    background: var(--white);
    position: relative;
}

.page-title {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
    position: relative;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Stats Section */
.stats-section {
    background: var(--white);
    padding: var(--space-2xl) 0;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: var(--space-2xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    text-align: center;
}

.stat-item {
    padding: var(--space-md);
}

.stat-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--space-xs);
    display: block;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-light);
    font-weight: var(--font-weight-medium);
}

/* Form System */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--text-dark);
    font-weight: var(--font-weight-medium);
    font-size: 0.9rem;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-sm);
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 85, 48, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

/* Alert/Message System */
.alert {
    padding: var(--space-sm);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.alert-success {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(72, 187, 120, 0.3);
}

.alert-error {
    background: rgba(245, 101, 101, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(245, 101, 101, 0.3);
}

/* Featured Content */
.featured {
    border-left: 4px solid var(--accent-color);
    background: linear-gradient(135deg, var(--white), rgba(125, 180, 108, 0.02));
    position: relative;
}

.featured::before {
    content: '⭐';
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    font-size: 1.2rem;
}

/* Image System */
.img-responsive {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.img-hover:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
    z-index: 1000;
}

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

.scroll-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    color: var(--white);
}

/* Footer */
footer {
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: var(--space-lg) 5%;
    margin-top: var(--space-2xl);
}

footer a {
    color: var(--light-green);
    text-decoration: none;
    transition: var(--transition);
}

footer a:hover {
    color: var(--white);
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

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

    .nav-links {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: var(--space-sm) 5%;
        gap: var(--space-sm);
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    /* Typography responsive adjustments */
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    
    .hero-text h1 { font-size: 2.8rem; }
    .hero-text h2 { font-size: 1.4rem; }
    .hero-text p { font-size: 1.1rem; }
    
    .page-title { font-size: 2.5rem; }
    .section-title { font-size: 2rem; }
    
    /* Grid responsive adjustments */
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .hero {
        background-attachment: scroll;
    }
}

@media (max-width: 480px) {
    :root {
        --space-sm: 0.75rem;
        --space-md: 1rem;
        --space-lg: 1.5rem;
        --space-xl: 2rem;
        --space-2xl: 3rem;
    }
    
    .container {
        padding: 0 var(--space-sm);
    }
    
    .navbar {
        padding: var(--space-sm) 3%;
    }
    
    .hero-text h1 { font-size: 2.2rem; }
    .hero-text h2 { font-size: 1.2rem; }
    .hero-text p { font-size: 1rem; }
    
    .page-title { font-size: 2rem; }
    .section-title { font-size: 1.5rem; }
    
    .card {
        padding: var(--space-md);
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.hidden { display: none; }
.visible { display: block; }