:root {
    --primary-color: #107c41; /* Excel Green */
    --primary-dark: #0b5a2e;
    --secondary-color: #2b3e50;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --gray: #6c757d;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* Navbar */
.navbar {
    background: var(--white);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.logo .highlight {
    color: var(--primary-color);
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    color: var(--secondary-color);
    transition: color 0.3s;
}

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

.btn-nav {
    background: var(--primary-color);
    color: white !important;
    padding: 10px 20px;
    border-radius: 6px;
    transition: background 0.3s !important;
}

.btn-nav:hover {
    background: var(--primary-dark) !important;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: radial-gradient(circle at top right, #e8f5e9 0%, #ffffff 50%);
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 30px;
}

.hero-btns {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 124, 65, 0.3);
}

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

.btn-secondary {
    background: white;
    color: var(--secondary-color);
    border: 1px solid #e0e0e0;
}

.btn-secondary:hover {
    border-color: var(--secondary-color);
}

.tech-badge {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--gray);
}

.tech-badge span i {
    margin-right: 5px;
}

/* Hero Image / Window Frame */
.hero-image {
    flex: 1;
}

.window-frame {
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid #eee;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform 0.5s;
}

.window-frame:hover {
    transform: perspective(1000px) rotateY(0) rotateX(0);
}

.window-header {
    background: #f1f3f4;
    padding: 12px;
    display: flex;
    gap: 8px;
    border-bottom: 1px solid #e0e0e0;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.red { background: #ff5f56; }
.yellow { background: #ffbd2e; }
.green { background: #27c93f; }

.app-preview {
    display: flex;
    height: 350px;
}

.sidebar {
    width: 200px;
    background: #f8f9fa;
    border-right: 1px solid #eee;
    padding: 15px;
}

.file-item {
    padding: 10px;
    margin-bottom: 8px;
    border-radius: 6px;
    color: var(--gray);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-item.active {
    background: #e8f5e9;
    color: var(--primary-color);
}

.main-area {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.progress-card {
    background: white;
    border: 1px solid #eee;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.progress-card h3 {
    font-size: 1rem;
    margin-bottom: 15px;
}

.progress-bar {
    height: 8px;
    background: #eee;
    border-radius: 4px;
    margin-bottom: 10px;
    overflow: hidden;
}

.fill {
    height: 100%;
    background: var(--primary-color);
}

.success-stat {
    display: flex;
    gap: 20px;
}

.stat-item {
    flex: 1;
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.stat-item h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.stat-item p {
    font-size: 0.8rem;
    color: var(--gray);
}

/* Features Section */
.features {
    padding: 100px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 30px;
    background: white;
    border-radius: 12px;
    border: 1px solid #eee;
    transition: transform 0.3s;
}

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

.icon-box {
    width: 60px;
    height: 60px;
    background: #e8f5e9;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* How it works */
.how-it-works {
    padding: 100px 0;
    background: var(--light-bg);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    padding: 0 20px;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin: 0 auto 20px;
}

.step-line {
    flex: 0.5;
    height: 2px;
    background: #ddd;
    margin-top: 25px;
}

/* CTA */
.cta-section {
    padding: 100px 0;
    background: var(--primary-color);
    text-align: center;
    color: white;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.cta-section p {
    margin-bottom: 40px;
    opacity: 0.9;
    font-size: 1.1rem;
}

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

.btn-light:hover {
    background: #f1f1f1;
}

.small-text {
    margin-top: 15px;
    font-size: 0.8rem !important;
    opacity: 0.7;
}

/* Footer */
footer {
    background: var(--secondary-color);
    color: white;
    padding: 50px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 30px;
    margin-bottom: 30px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-links a {
    margin-left: 20px;
    color: rgba(255,255,255,0.7);
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.copyright {
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .tech-badge {
        justify-content: center;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-line {
        display: none;
    }
    
    .step {
        margin-bottom: 30px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
}