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

body {
    background: #3a5f6b;
    font-family: 'Open Sans', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 25px;
}

.presentation {
    max-width: 1300px;
    width: 100%;
    background: #ffffff;
    border-radius: 50px 50px 40px 40px;
    box-shadow: 0 40px 70px -20px #1e3f4a, 0 0 0 1px #d4e0e9 inset;
    overflow: hidden;
}

.slide-header {
    background: #3a5f6b;
    background: linear-gradient(145deg, #3a5f6b, #294a54);
    padding: 25px 45px;
    color: white;
    border-bottom: 6px solid #f4b350;
}

.stage {
    font-family: 'Raleway', sans-serif;
    font-size: 1.2rem;
    letter-spacing: 2px;
    opacity: 0.9;
    margin-bottom: 5px;
    text-transform: uppercase;
}

.title {
    font-family: 'Raleway', sans-serif;
    font-size: 3.6rem;
    font-weight: 800;
    line-height: 1.1;
    text-shadow: 0 3px 8px #00000040;
}

.subtitle {
    font-size: 1.4rem;
    opacity: 0.95;
    margin-top: 8px;
    font-weight: 400;
}

.slide-body {
    padding: 45px 50px 50px 50px;
    background: #fcfdff;
}

.section-header {
    margin-bottom: 40px;
    border-left: 18px solid #f4b350;
    padding-left: 25px;
}

.section-header h2 {
    font-family: 'Raleway', sans-serif;
    font-size: 2.5rem;
    color: #294a54;
    margin-bottom: 10px;
}

.definition-block {
    background: #fef9e6;
    border-radius: 40px;
    padding: 35px 40px;
    margin: 30px 0;
    border: 1px solid #f4b350;
    box-shadow: 0 15px 25px -20px #294a54;
}

.definition-title {
    font-family: 'Raleway', sans-serif;
    font-size: 2rem;
    color: #294a54;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.definition-title i {
    color: #f4b350;
    font-size: 2.5rem;
}

.definition-text {
    font-size: 1.3rem;
    line-height: 1.6;
    color: #2c3e50;
    margin-bottom: 20px;
    font-weight: 500;
    background: white;
    padding: 25px;
    border-radius: 30px;
    border: 2px dashed #f4b350;
}

.roles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin: 30px 0;
}

.role-card {
    background: #f8faff;
    border-radius: 30px;
    padding: 30px;
    border-bottom: 8px solid #f4b350;
    transition: 0.2s;
}

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

.role-icon {
    font-size: 2.5rem;
    color: #f4b350;
    margin-bottom: 20px;
}

.role-card h3 {
    font-family: 'Raleway', sans-serif;
    font-size: 1.8rem;
    color: #294a54;
    margin-bottom: 15px;
}

.role-card p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #2c3e50;
}

.role-card ul {
    list-style: none;
    margin-top: 15px;
}

.role-card li {
    margin-bottom: 8px;
}

.role-card li i {
    color: #f4b350;
    margin-right: 8px;
}

.creative-block {
    background: #e9f2f9;
    border-radius: 40px;
    padding: 30px 40px;
    margin: 35px 0;
    border-right: 16px solid #f4b350;
}

.creative-block h3 {
    font-family: 'Raleway', sans-serif;
    font-size: 1.8rem;
    color: #294a54;
    margin-bottom: 20px;
}

.creative-block p {
    font-size: 1.15rem;
    line-height: 1.6;
}

.creative-block ul {
    margin: 20px 0 0 30px;
}

.highlight-box {
    background: #f4b35020;
    border-radius: 30px;
    padding: 20px;
    margin: 20px 0;
    border-left: 12px solid #f4b350;
}

hr {
    border: 1px solid #d0e0ec;
    margin: 30px 0 15px;
}

.footer-note {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #3a5f6b;
    font-size: 1rem;
    margin-top: 20px;
}

.nav-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 35px;
    gap: 20px;
}

.nav-btn {
    background: #3a5f6b;
    color: white;
    padding: 12px 30px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    transition: 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.nav-btn:hover {
    background: #f4b350;
    color: #294a54;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px #00000020;
}

@media (max-width: 800px) {
    .title {
        font-size: 2.4rem;
    }
    .slide-body {
        padding: 25px;
    }
    .roles-grid {
        grid-template-columns: 1fr;
    }
    .nav-buttons {
        flex-direction: column;
    }
}