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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.9;
}

main {
    padding: 40px 20px;
}

.app-section {
    margin-bottom: 40px;
}

.app-section h2 {
    color: #667eea;
    font-size: 1.8em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
}

.links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.link-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.link-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    border-color: #667eea;
}

.link-card h3 {
    color: #667eea;
    font-size: 1.4em;
    margin-bottom: 10px;
}

.link-card p {
    color: #666;
}

.content-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

.content-page h1 {
    color: #667eea;
    margin-bottom: 10px;
}

.content-page .last-updated {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 30px;
}

.content-page h2 {
    color: #333;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.content-page p, .content-page ul, .content-page ol {
    margin-bottom: 15px;
    color: #555;
}

.content-page ul, .content-page ol {
    margin-left: 30px;
}

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

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.back-link:hover {
    text-decoration: underline;
}

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

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.warning-box {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
}

.warning-box strong {
    color: #856404;
}

.info-box {
    background: #d1ecf1;
    border-left: 4px solid #17a2b8;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
}

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #666;
    border-top: 1px solid #ddd;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    .links {
        grid-template-columns: 1fr;
    }
    
    .content-page {
        padding: 20px 15px;
    }
}