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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

/* ========================================
   VARIABLES
   ======================================== */

:root {
    /* Colors */
    --primary-green: #0f5b3f;
    --primary-green-light: #1a6b4f;
    --accent-yellow: #c9db57;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --border-light: #e2e8f0;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

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

/* ========================================
   HEADER STYLES
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-green);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-green);
    transition: var(--transition);
}

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

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 2rem;
}

.hero h2 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    line-height: 1.7;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.cta-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* ========================================
   SECTION STYLES
   ======================================== */

section {
    padding: 5rem 0;
}

section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-green);
    border-radius: 2px;
}

/* ========================================
   TEAM SECTION
   ======================================== */

.team-section {
    background: var(--white);
}

.team-grid-2x2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.team-member {
    background: var(--white);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.member-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-light));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    position: relative;
}

.member-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.avatar-text {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    position: absolute;
    z-index: 1;
}

.team-member h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.member-role {
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 1rem;
}

.member-info {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 10px;
    margin-top: 1rem;
}

.member-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* GitHub Link Styles */
.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-light);
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

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

.github-icon {
    width: 16px;
    height: 16px;
    transition: var(--transition);
}

/* ========================================
   PROJECT SECTION
   ======================================== */

.project-section {
    background: var(--bg-light);
}

.project-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.project-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

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

.project-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.project-card p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.project-card ul {
    list-style: none;
    padding: 0;
}

.project-card li {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.project-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-yellow);
    font-weight: bold;
}


/* ========================================
   GITHUB PROJECT SECTION
   ======================================== */

.github-section {
    background: var(--bg-light);
}

.github-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.github-content p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1.1rem;
    line-height: 1.6;
}

.github-project-link {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: var(--white);
    color: var(--text-dark);
    text-decoration: none;
    border-radius: 15px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    border: 2px solid var(--border-light);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.github-project-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(15, 91, 63, 0.1), transparent);
    transition: var(--transition);
}

.github-project-link:hover {
    background: var(--primary-green);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-green);
}

.github-project-link:hover::before {
    left: 100%;
}

.github-icon-large {
    width: 24px;
    height: 24px;
    transition: var(--transition);
}

.repo-name {
    font-size: 0.9rem;
    opacity: 0.8;
    font-weight: 500;
}

.github-project-link:hover .repo-name {
    opacity: 1;
}

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

.footer {
    background: var(--text-dark);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

.footer p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

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

@media (max-width: 768px) {
    .nav {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    section {
        padding: 3rem 0;
    }
    
    section h2 {
        font-size: 2rem;
    }
    
    .team-grid-2x2 {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .project-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .team-member,
    .project-card {
        padding: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 2rem;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .team-member,
    .project-card {
        padding: 1rem;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

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

.team-member,
.project-card {
    animation: fadeInUp 0.6s ease-out;
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

a:focus,
button:focus {
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}