body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Header Navigation */
.header-nav {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.header-nav .brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-nav .nav-link {
    color: #667eea;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.header-nav .nav-link:hover {
    background: #667eea;
    color: white;
}

.header-nav .nav-link.active {
    background: #667eea;
    color: white;
}

/* Hero Section */
.hero-section {
    background: white;
    border-radius: 15px;
    padding: 3.5rem 3rem;
    margin-bottom: 2.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    text-align: center;
}

.hero-section h1 {
    color: #2d3748;
    font-weight: 700;
    font-size: 2.75rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-section .lead {
    color: #4a5568;
    font-size: 1.35rem;
    font-weight: 400;
    margin-bottom: 0;
}

/* Content Card */
.content-card {
    background: white;
    border-radius: 15px;
    padding: 3rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    margin-bottom: 2.5rem;
}

.content-card h4 {
    color: #2d3748;
    font-weight: 700;
    font-size: 1.75rem;
    margin-bottom: 2rem;
}

.content-card p {
    color: #4a5568;
    line-height: 1.8;
    font-size: 1.05rem;
    margin-bottom: 1.25rem;
}

.content-card p.lead {
    font-size: 1.15rem;
    font-weight: 500;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

/* Feature Box */
.feature-box {
    padding: 1.5rem;
    border-left: 4px solid #667eea;
    margin-bottom: 1.25rem;
    background-color: #f7fafc;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.feature-box:hover {
    background-color: #edf2f7;
    transform: translateX(5px);
}

.feature-box i {
    color: #667eea;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.feature-box strong {
    font-size: 1.05rem;
    color: #2d3748;
}

/* Note Box */
.note-box {
    background: linear-gradient(135deg, #fff3cd 0%, #ffe8a1 100%);
    border: 2px solid #ffc107;
    padding: 2.25rem;
    border-radius: 10px;
    margin: 2.5rem 0;
    box-shadow: 0 4px 15px rgba(255, 193, 7, 0.2);
}

.note-box h5 {
    color: #856404;
    font-weight: 700;
    font-size: 1.35rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.note-box h5 i {
    font-size: 1.5rem;
}

.note-box p, .note-box ul {
    color: #856404;
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
    line-height: 1.7;
}

.note-box ul {
    padding-left: 1.75rem;
}

.note-box li {
    margin-bottom: 0.5rem;
}

/* Comparison Cards */
.comparison-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    height: 100%;
}

.comparison-card .card-header {
    padding: 1.25rem;
    font-weight: 700;
    font-size: 1.1rem;
}

.comparison-card .card-header i {
    margin-right: 0.5rem;
    font-size: 1.2rem;
}

.comparison-card .card-body {
    padding: 1.5rem;
}

.comparison-card ul {
    margin: 0;
    padding-left: 1.75rem;
}

.comparison-card li {
    margin-bottom: 0.75rem;
    font-size: 1.05rem;
    line-height: 1.6;
}

/* CTA Button */
.cta-section {
    background: white;
    border-radius: 15px;
    padding: 3.5rem;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    margin-bottom: 2.5rem;
}

.cta-section h4 {
    color: #2d3748;
    font-weight: 700;
    font-size: 1.85rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.1rem;
}

.btn-cta {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 1.15rem 3.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    border-radius: 10px;
    font-size: 1.25rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    color: white;
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-cta i {
    margin-left: 0.75rem;
    font-size: 1.3rem;
}

/* Developer Section */
.developer-section {
    background: white;
    border-radius: 15px;
    padding: 2.5rem;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    margin-bottom: 3rem;
}

.developer-section h5 {
    color: #2d3748;
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.developer-section p {
    color: #4a5568;
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

.developer-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-developer {
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 1rem;
}

.btn-linkedin {
    background: #0077b5;
    color: white;
}

.btn-linkedin:hover {
    background: #005885;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 119, 181, 0.4);
    color: white;
}

.btn-portfolio {
    background: #667eea;
    color: white;
}

.btn-portfolio:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    color: white;
}

.btn-email {
    background: #ea4335;
    color: white;
}

.btn-email:hover {
    background: #d33426;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(234, 67, 53, 0.4);
    color: white;
}

@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }

    .hero-section .lead {
        font-size: 1.15rem;
    }

    .content-card h4 {
        font-size: 1.5rem;
    }

    .developer-links {
        flex-direction: column;
    }

    .btn-developer {
        width: 100%;
        justify-content: center;
    }
}