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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 20px 30px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 28px;
    font-weight: bold;
    color: #667eea;
}

.logo i {
    font-size: 36px;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-link {
    color: #555;
    text-decoration: none;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-link:hover {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    transform: translateY(-2px);
}

/* Main Content Card */
.main-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    animation: fadeInUp 0.6s ease-out;
}

.page-title {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
    text-align: center;
    position: relative;
}

.page-subtitle {
    font-size: 18px;
    color: #666;
    text-align: center;
    margin-bottom: 40px;
}

/* Back Button */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    background: rgba(255, 255, 255, 0.95);
    color: #667eea;
    text-decoration: none;
    border-radius: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.back-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

/* Collapsible Sections */
.collapsible-section {
    margin-bottom: 25px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.collapsible-section:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.section-header {
    padding: 25px 30px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.section-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s ease;
}

.section-header:hover::before {
    left: 100%;
}

.section-header h2 {
    font-size: 24px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 15px;
}

.toggle-icon {
    font-size: 20px;
    transition: transform 0.3s ease;
}

.section-header.active .toggle-icon {
    transform: rotate(180deg);
}

.section-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background: white;
}

.section-content.active {
    max-height: 1000px;
    padding: 30px;
}

/* Checklist Styles */
.checklist-content {
    display: grid;
    gap: 25px;
}

.checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 15px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.checklist-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateX(5px);
}

.checklist-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.checklist-text h3 {
    color: #333;
    margin-bottom: 8px;
    font-size: 18px;
    font-weight: 600;
}

.checklist-text p {
    color: #666;
    line-height: 1.6;
    font-size: 15px;
}

/* Slideshow Styles */
.slideshow-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.slideshow-wrapper {
    position: relative;
    background: #f8f9fa;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.slide-container {
    width: 100%;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    position: relative;
}

.slide {
    width: 100%;
    height: 100%;
    display: none;
    align-items: center;
    justify-content: center;
    position: relative;
}

.slide.active {
    display: flex;
}

.slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 10px;
}

.slide-navigation {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 10;
}

.nav-btn {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #667eea;
    font-size: 18px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.nav-btn:hover {
    background: white;
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.nav-btn:disabled:hover {
    transform: none;
    background: rgba(255, 255, 255, 0.9);
}

.slide-counter {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    z-index: 10;
}

.slide-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: #667eea;
    transform: scale(1.2);
}

.dot:hover {
    background: #667eea;
    transform: scale(1.1);
}

.loading-message {
    color: #667eea;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.error-message {
    color: #e74c3c;
    font-size: 16px;
    text-align: center;
    padding: 20px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    color: #666;
}

.footer a {
    color: #667eea;
    text-decoration: none;
    margin: 0 10px;
}

.footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 15px 20px;
    }

    .logo {
        font-size: 20px;
    }

    .container {
        padding: 15px;
    }

    .main-card {
        padding: 25px;
    }

    .page-title {
        font-size: 28px;
    }

    .section-content.active {
        padding: 20px;
    }

    .slide-container {
        height: 350px;
    }

    .nav-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .slide-navigation {
        padding: 0 10px;
    }

    .checklist-item {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .checklist-icon {
        margin: 0 auto;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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