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

body {
    font-family: "Nunito", sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.navigation {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-btn {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    font-size: 14px;
}

.nav-btn:hover, .nav-btn.active {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(30, 60, 114, 0.3);
}

.back-btn {
    background: #6c757d;
    margin-right: 10px;
}

.back-btn:hover {
    background: #5a6268;
}

.content {
    background: white;
    margin: 40px 0;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.page-section {
    display: none;
}

.page-section.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-section h2 {
    color: #1e3c72;
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: 3px solid #64b5f6;
    padding-bottom: 10px;
}

.page-section h3 {
    color: #2a5298;
    font-size: 1.3rem;
    margin: 25px 0 15px 0;
}

.page-section p {
    margin-bottom: 15px;
    text-align: justify;
}

.page-section ul {
    margin: 15px 0;
    padding-left: 30px;
}

.page-section li {
    margin-bottom: 8px;
}

.highlight {
    background: linear-gradient(120deg, #a8edea 0%, #fed6e3 100%);
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border-left: 4px solid #1e3c72;
}

.contact-info {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    text-align: center;
}

.footer {
    background: #1e3c72;
    color: white;
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
}

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

    .content {
        padding: 20px;
        margin: 20px 0;
    }

    .nav-buttons {
        flex-direction: column;
        align-items: center;
    }

    .nav-btn {
        width: 200px;
    }
}

@media (max-width: 600px) {
    .nav-btn {
        font-size: 14px;
        padding: 10px 20px;
        width: 95%;
    }
}

@media (max-width: 500px) {
    .nav-btn {
        width: 92%;
        font-size: 13.5px;
    }
}

@media (max-width: 400px) {
    .nav-buttons {
        gap: 12px;
    }

    .nav-btn {
        width: 90%;
        padding: 10px 18px;
        font-size: 13px;
    }

    .back-btn {
        font-size: 13px;
        padding: 10px 18px;
    }
}

@media (max-width: 360px) {
    .nav-btn {
        font-size: 12px;
        padding: 9px 16px;
    }
}

@media (max-width: 320px) {
    .nav-btn {
        width: 100%;
        font-size: 11.5px;
    }
}

@media (max-width: 280px) {
    .nav-btn {
        font-size: 10.5px;
        padding: 8px 14px;
    }
}

@media screen and (max-width: 768px) and (orientation: landscape) {
    .nav-buttons {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }

    .nav-btn {
        width: auto;
        min-width: 150px;
        font-size: 13px;
    }
}

@media screen and (max-width: 480px) and (orientation: landscape) {
    .nav-btn {
        font-size: 12px;
        padding: 8px 14px;
        width: auto;
    }
}

@media (min-width: 401px) and (max-width: 600px) {
    .nav-btn {
        width: 95%;
        font-size: 14px;
    }
}

@media screen and (max-height: 375px) {
    .nav-btn {
        padding: 8px 14px;
        font-size: 12px;
    }
}