/* Inventory Manager Web Portal Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* Header */
.header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.header h1 {
    text-align: center;
    font-weight: 300;
}

/* Navigation */
.nav {
    background: #34495e;
    padding: 0.5rem 0;
    margin-bottom: 2rem;
}

.nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

.nav a:hover, .nav a.active {
    background: #2c3e50;
}

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

.card h2 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

/* File Upload Area */
.upload-area {
    border: 3px dashed #bdc3c7;
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background: #f8f9fa;
}

.upload-area:hover {
    border-color: #3498db;
    background: #e3f2fd;
}

.upload-area.dragover {
    border-color: #2ecc71;
    background: #e8f5e8;
}

.upload-area input[type="file"] {
    display: none;
}

.upload-icon {
    font-size: 3rem;
    color: #95a5a6;
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.9rem;
    color: #95a5a6;
}

/* Progress Bar */
.progress-container {
    margin: 1rem 0;
    display: none;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #ecf0f1;
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2ecc71);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: #7f8c8d;
}

/* Results Display */
.results-container {
    display: none;
    margin-top: 2rem;
}

.result-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-box {
    background: white;
    padding: 1rem;
    border-radius: 6px;
    text-align: center;
    border-left: 4px solid #3498db;
}

.stat-box.success { border-left-color: #2ecc71; }
.stat-box.warning { border-left-color: #f39c12; }
.stat-box.error { border-left-color: #e74c3c; }

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: #2c3e50;
}

.stat-label {
    font-size: 0.9rem;
    color: #7f8c8d;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin-top: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

tr:hover {
    background: #f8f9fa;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}

.btn-success { background: #2ecc71; }
.btn-success:hover { background: #27ae60; }

.btn-warning { background: #f39c12; }
.btn-warning:hover { background: #e67e22; }

.btn-danger { background: #e74c3c; }
.btn-danger:hover { background: #c0392b; }

.btn-secondary { background: #95a5a6; }
.btn-secondary:hover { background: #7f8c8d; }

/* Error and Success Messages */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

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

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

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

/* Loading Spinner */
.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* Search Form */
.search-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

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

.form-group input, .form-group select {
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .nav ul {
        flex-direction: column;
        gap: 0;
    }

    .nav a {
        display: block;
        text-align: center;
    }

    .result-summary {
        grid-template-columns: repeat(2, 1fr);
    }

    .search-form {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.hidden { display: none; }

/* Status badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
}

.badge-success { background: #2ecc71; color: white; }
.badge-warning { background: #f39c12; color: white; }
.badge-error { background: #e74c3c; color: white; }
.badge-info { background: #3498db; color: white; }