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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-logo {
    height: 30px;
    width: auto;
    object-fit: contain;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
}

nav {
    display: flex;
    gap: 1rem;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

nav a.logout-btn {
    background-color: #e74c3c;
}

nav a.logout-btn:hover {
    background-color: #c0392b;
}

/* Main Content */
main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Footer */
footer {
    background-color: #34495e;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
}

/* Messages */
.messages {
    margin-bottom: 1.5rem;
}

.message {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

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

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

.message.warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

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

/* Boxes */
.info-box,
.summary-box,
.actions-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 1rem;
    border-radius: 4px;
    border-left: 4px solid #dc3545;
    margin-bottom: 1.5rem;
}

.warning-message {
    background-color: #fff3cd;
    color: #856404;
    padding: 1rem;
    border-radius: 4px;
    border-left: 4px solid #ffc107;
    margin-bottom: 1.5rem;
}

.info-box h3,
.summary-box h3,
.actions-box h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.info-box ul {
    margin-left: 1.5rem;
}

.info-box li {
    margin-bottom: 0.5rem;
}

.info-box code {
    background-color: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.9em;
}

/* Summary Stats */
.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.stat {
    display: flex;
    flex-direction: column;
    padding: 0.75rem;
    background-color: #f8f9fa;
    border-radius: 4px;
}

.stat-label {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.5em;
    font-weight: 600;
    color: #2c3e50;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* File Upload */
.file-label {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #3498db;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.file-label:hover {
    background-color: #2980b9;
}

.file-icon {
    margin-right: 0.5rem;
}

input[type="file"] {
    display: none;
}

.file-name {
    display: inline-block;
    margin-left: 1rem;
    color: #666;
    font-style: italic;
}

.file-name.has-file {
    color: #2c3e50;
    font-style: normal;
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: translateY(1px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.button-text, .button-loader {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.spinner {
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid #ffffff;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.login-box {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    margin-bottom: 1.5rem;
    color: #2c3e50;
    text-align: center;
}

/* Upload Page */
.upload-container,
.validation-container,
.results-container {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.upload-form {
    margin-top: 1.5rem;
}

/* Network Cards */
.networks-list,
.results-list {
    margin-top: 1.5rem;
}

.network-card,
.result-card {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.network-header,
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #ecf0f1;
}

.network-header h4,
.result-header h4 {
    color: #2c3e50;
    font-size: 1.2rem;
}

.vlan-count {
    background-color: #3498db;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    main {
        padding: 0 1rem;
        margin: 1rem auto;
    }

    .summary-stats {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

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