* {
    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;
}

/* Header Styles */
.main-header {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
    text-decoration: none;
}

.main-nav {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.main-nav a {
    color: #333;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.main-nav a:hover {
    background: #f0f0f0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-logout {
    background: #dc3545;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    text-decoration: none;
    font-size: 0.9rem;
}

.btn-logout:hover {
    background: #c82333;
}

/* Main Container */
.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero-section {
    text-align: center;
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.hero-section h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

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

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.features-grid .feature-card:nth-child(1),
.features-grid .feature-card:nth-child(2) {
    grid-column: span 3;
}

.features-grid .feature-card:nth-child(3),
.features-grid .feature-card:nth-child(4),
.features-grid .feature-card:nth-child(5) {
    grid-column: span 2;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #667eea;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Content Card */
.content-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.page-header {
    text-align: center;
    color: white;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

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

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: #666;
    font-size: 0.9rem;
}

.login-form,
.upload-form,
.ping-form,
.search-form,
.settings-form,
.page-form {
    max-width: 500px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #667eea;
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #5568d3;
}

.btn-primary {
    background: #667eea;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-block {
    width: 100%;
    display: block;
    text-align: center;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Tables */
.file-table,
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.file-table th,
.file-table td,
.info-table th,
.info-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.file-table th,
.info-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

/* Page List */
.page-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.page-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

.page-link:hover {
    background: #5568d3;
}

/* Output Box */
.output-box {
    margin-top: 2rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 5px;
    border: 1px solid #ddd;
}

.output-box pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Results List */
.results-list {
    margin-top: 1.5rem;
}

.result-item {
    padding: 1.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-bottom: 1rem;
    background: #f8f9fa;
}

.result-item h3 {
    color: #667eea;
    margin-bottom: 0.5rem;
}

.result-item p {
    color: #666;
    line-height: 1.6;
}

.search-info {
    margin-bottom: 1rem;
    color: #666;
}

/* Quick Links */
.quick-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Info Section */
.info-section {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    margin-top: 2rem;
}

.info-section h2 {
    color: #667eea;
    margin-bottom: 1rem;
}

.info-section p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1rem;
}

/* Footer */
.main-footer {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
    color: #666;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Page Content */
.page-content {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 5px;
    border: 1px solid #ddd;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid .feature-card {
        grid-column: span 1 !important;
    }
    
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-nav {
        justify-content: center;
    }
}