* {
    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: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Navigation */
nav {
    background: rgba(255, 255, 255, 0.95);
    padding: 15px 0;
    margin-bottom: 20px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    padding: 0 20px;
}

nav ul li a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s;
}

nav ul li a:hover, nav ul li a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

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

header {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    text-align: center;
}

header h1 {
    font-size: 3em;
    color: #667eea;
    margin-bottom: 10px;
}

header .tagline {
    font-size: 1.3em;
    color: #666;
}

.hero {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 60px 40px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.hero h2 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2em;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.content-section {
    background: white;
    padding: 40px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.content-section h2 {
    font-size: 2.2em;
    color: #667eea;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.content-section h3 {
    font-size: 1.6em;
    color: #764ba2;
    margin-top: 30px;
    margin-bottom: 15px;
}

.content-section p {
    font-size: 1.1em;
    margin-bottom: 15px;
    color: #555;
}

.content-section ul {
    margin-left: 30px;
    margin-bottom: 20px;
}

.content-section ul li {
    margin-bottom: 10px;
    color: #555;
    font-size: 1.05em;
}

.icon {
    font-size: 1.5em;
}

.backup-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.backup-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.backup-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.backup-card h3 {
    color: white;
    margin-top: 0;
    font-size: 1.5em;
    margin-bottom: 15px;
}

.backup-card .card-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

/* Vendor Logo */
.vendor-logo {
    max-width: 300px;
    height: auto;
    margin: 30px 0;
    display: block;
}

.vendor-header {
    display: flex;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.vendor-info {
    flex: 1;
    min-width: 300px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.feature-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.feature-card h4 {
    font-size: 1.3em;
    margin-bottom: 10px;
    color: white;
}

.feature-card p {
    font-size: 1em;
    color: rgba(255, 255, 255, 0.95);
}

.rule-321 {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: white;
    padding: 50px;
    border-radius: 20px;
    margin: 40px 0;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.rule-321 h2 {
    font-size: 3em;
    margin-bottom: 20px;
    color: white;
}

.rule-321 p {
    font-size: 1.3em;
    line-height: 1.8;
    color: white;
}

.rule-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.rule-item {
    background: rgba(255, 255, 255, 0.2);
    padding: 25px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.rule-item .number {
    font-size: 4em;
    font-weight: bold;
    margin-bottom: 10px;
}

.rule-item h4 {
    font-size: 1.2em;
    margin-bottom: 10px;
}

.best-practices {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 40px;
    border-radius: 20px;
    margin-bottom: 30px;
}

.best-practices h2 {
    color: white;
    margin-bottom: 25px;
}

.practices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 25px;
}

.practice-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 25px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.practice-item .practice-icon {
    font-size: 2.5em;
    margin-bottom: 15px;
}

.practice-item h4 {
    font-size: 1.3em;
    margin-bottom: 10px;
}

.practice-item p {
    font-size: 1em;
    color: rgba(255, 255, 255, 0.95);
}

footer {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    color: #666;
    margin-top: 40px;
}

footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
}

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

.sources {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    margin-top: 20px;
}

.sources h3 {
    color: #667eea;
    margin-bottom: 15px;
}

.sources ul {
    list-style: none;
    padding: 0;
}

.sources li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.sources li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

.sources a {
    color: #667eea;
    text-decoration: none;
}

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

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

    .hero h2 {
        font-size: 1.8em;
    }

    .backup-types {
        grid-template-columns: 1fr;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .vendor-header {
        flex-direction: column;
        text-align: center;
    }
}