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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header */
header {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

nav h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

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

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero .subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Content Sections */
.content-section {
    padding: 4rem 0;
    background: white;
    margin: 2rem 0;
    border-radius: 10px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.content-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    text-align: center;
}

.content-section p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #555;
}

/* Mix Overview */
.mix-overview {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.mix-overview h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

.elements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.element-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.element-card:hover {
    transform: translateY(-5px);
}

.element-card h4 {
    color: #e74c3c;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Advertising Types */
.advertising-types h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

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

.type-item {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
}

.type-item h4 {
    color: #e74c3c;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.type-item ul {
    list-style: none;
}

.type-item li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.type-item li:last-child {
    border-bottom: none;
}

.advertising-advantages {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.advertising-advantages h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.advertising-advantages ul {
    list-style: none;
}

.advertising-advantages li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.advertising-advantages li:last-child {
    border-bottom: none;
}

/* Sales Promotion */
.promotion-types h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

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

.promotion-category {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
}

.promotion-category h4 {
    color: #e74c3c;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.promotion-category ul {
    list-style: none;
}

.promotion-category li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.promotion-category li:last-child {
    border-bottom: none;
}

.promotion-benefits {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.promotion-benefits h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.promotion-benefits ul {
    list-style: none;
}

.promotion-benefits li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.promotion-benefits li:last-child {
    border-bottom: none;
}

/* Personal Selling */
.selling-process h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.step {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
}

.step h4 {
    color: #e74c3c;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.selling-advantages {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.selling-advantages h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.selling-advantages ul {
    list-style: none;
}

.selling-advantages li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.selling-advantages li:last-child {
    border-bottom: none;
}

/* Public Relations */
.pr-activities h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

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

.activity-category {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
}

.activity-category h4 {
    color: #e74c3c;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.activity-category ul {
    list-style: none;
}

.activity-category li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.activity-category li:last-child {
    border-bottom: none;
}

.pr-benefits {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.pr-benefits h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.pr-benefits ul {
    list-style: none;
}

.pr-benefits li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.pr-benefits li:last-child {
    border-bottom: none;
}

/* Integration Strategies */
.integration-strategies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.strategy {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
}

.strategy h3 {
    color: #e74c3c;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .content-section h2 {
        font-size: 2rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    .elements-grid,
    .types-grid,
    .promotion-grid,
    .process-steps,
    .activities-grid,
    .integration-strategies {
        grid-template-columns: 1fr;
    }
}