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

:root {
    --primary-color: #8B4513;
    --secondary-color: #D2691E;
    --dark-color: #4A2511;
    --light-color: #F5DEB3;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --border-color: #ddd;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--light-color) 0%, #fff 100%);
    color: var(--text-color);
    min-height: 100vh;
    line-height: 1.6;
}

/* Login Page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--dark-color) 0%, var(--primary-color) 50%, var(--secondary-color) 100%);
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: var(--primary-color);
    font-size: 2em;
    margin-bottom: 10px;
}

.login-header p {
    color: #666;
}

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

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: #888;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--dark-color) 0%, var(--primary-color) 100%);
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 1.8em;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-user span {
    padding: 8px 15px;
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
}

/* Navigation */
.nav {
    background: var(--primary-color);
    padding: 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 0;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 15px 25px;
    display: inline-block;
    transition: background 0.3s;
    border-bottom: 3px solid transparent;
}

.nav a:hover {
    background: var(--dark-color);
    border-bottom-color: var(--secondary-color);
}

.nav a.active {
    background: var(--dark-color);
    border-bottom-color: var(--light-color);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 30px auto;
    padding: 0 20px;
}

/* Cards */
.card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-left: 5px solid var(--primary-color);
}

.card h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.5em;
}

.card h3 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 1.2em;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left-color: var(--success-color);
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-left-color: var(--danger-color);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-left-color: var(--warning-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.form-grid .full-width {
    grid-column: 1 / -1;
}

.form-inline {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.form-inline input,
.form-inline select {
    flex: 1;
    min-width: 150px;
}

/* Buttons */
.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--dark-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

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

.btn-small {
    padding: 6px 12px;
    font-size: 0.9em;
}

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

/* Tables */
.table-responsive {
    overflow-x: auto;
}

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

.data-table thead {
    background: var(--primary-color);
    color: white;
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background: var(--light-color);
}

.data-table tbody tr.low-stock {
    background: #fff3cd;
}

/* Badges */
.badge {
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85em;
    font-weight: 600;
}

.badge-admin {
    background: var(--primary-color);
    color: white;
}

.badge-user {
    background: var(--secondary-color);
    color: white;
}

.badge-active {
    background: var(--success-color);
    color: white;
}

.badge-inactive {
    background: #6c757d;
    color: white;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-top: 4px solid var(--primary-color);
}

.stat-card.warning {
    border-top-color: var(--warning-color);
}

.stat-card.success {
    border-top-color: var(--success-color);
}

.stat-card h3 {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.stat-card .stat-value {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-card .stat-label {
    color: #888;
    font-size: 0.9em;
}

/* Info Display */
.info-display {
    padding: 12px 15px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-content {
        flex-direction: column;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .form-inline {
        flex-direction: column;
    }
    
    .form-inline input,
    .form-inline select {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease-out;
}