/* Stock Management System - Complete CSS */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

/* Navigation */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
    margin-bottom: 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.navbar-brand {
    font-weight: bold;
    color: var(--primary-color);
    font-size: 1.5rem;
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar-nav .nav-link {
    color: var(--dark-color);
    font-weight: 500;
    margin: 0 0.5rem;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color);
    background-color: rgba(0,123,255,0.1);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--dark-color);
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

/* Button group */
.btn-group {
    display: inline-flex;
    flex-wrap: nowrap;
    gap: 0.25rem;
}

/* Small buttons */
.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background-color: #1e7e34;
    transform: translateY(-1px);
}

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

.btn-danger:hover {
    background-color: #c82333;
    transform: translateY(-1px);
}

.btn-warning {
    background-color: var(--warning-color);
    color: var(--dark-color);
}

.btn-warning:hover {
    background-color: #e0a800;
    transform: translateY(-1px);
}

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

.btn-info:hover {
    background-color: #138496;
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background-color: #545b62;
    transform: translateY(-1px);
}

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

.card-header {
    background: #f8f9fa;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #dee2e6;
    font-weight: 600;
    color: var(--dark-color);
}

.card-body {
    padding: 1.5rem;
}

/* Dashboard Stats */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-left: 4px solid var(--primary-color);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-right: 1rem;
    flex-shrink: 0;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: bold;
    color: var(--dark-color);
    margin: 0;
    line-height: 1;
}

.stat-info p {
    color: var(--secondary-color);
    margin: 0.5rem 0 0 0;
    font-size: 0.875rem;
}

/* Dashboard Actions */
.dashboard-actions {
    background: #fff;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.action-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    text-decoration: none;
    color: inherit;
    border: 2px solid transparent;
    transition: all 0.3s;
}

.action-card:hover {
    background: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0,123,255,0.15);
    text-decoration: none;
    color: inherit;
}

.action-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.action-card h3 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.action-card p {
    color: var(--secondary-color);
    margin: 0;
    font-size: 0.875rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -0.5rem;
    margin-left: -0.5rem;
}

.col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
    padding: 0 0.5rem;
}

.col-md-4 {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
    padding: 0 0.5rem;
}

.col-md-3 {
    flex: 0 0 25%;
    max-width: 25%;
    padding: 0 0.5rem;
}

.col-md-12 {
    flex: 0 0 100%;
    max-width: 100%;
    padding: 0 0.5rem;
}

/* Tables */
.table {
    width: 100%;
    margin-bottom: 1rem;
    color: var(--dark-color);
    background-color: transparent;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.75rem;
    vertical-align: top;
    border-top: 1px solid #dee2e6;
    text-align: left;
}

.table thead th {
    vertical-align: bottom;
    border-bottom: 2px solid #dee2e6;
    border-top: 0;
    font-weight: 600;
    background-color: #f8f9fa;
}

.table tbody tr:hover {
    background-color: rgba(0,0,0,.02);
}

.table-responsive {
    display: block;
    width: 100%;
    overflow-x: auto;
}

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}

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

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

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

.alert-info {
    background-color: #d1ecf1;
    border-color: #bee5eb;
    color: #0c5460;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25em 0.4em;
    font-size: 75%;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
}

.badge-primary {
    color: #fff;
    background-color: var(--primary-color);
}

.badge-success {
    color: #fff;
    background-color: var(--success-color);
}

.badge-danger {
    color: #fff;
    background-color: var(--danger-color);
}

.badge-warning {
    color: var(--dark-color);
    background-color: var(--warning-color);
}

.badge-info {
    color: #fff;
    background-color: var(--info-color);
}

.badge-secondary {
    color: #fff;
    background-color: var(--secondary-color);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1050;
    width: 100%;
    height: 100%;
    overflow: hidden;
    outline: 0;
    background-color: rgba(0,0,0,0.5);
    display: none;
}

.modal.show {
    display: block;
}

.modal-dialog {
    position: relative;
    width: auto;
    margin: 1.75rem auto;
    max-width: 500px;
}

.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    pointer-events: auto;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid rgba(0,0,0,.2);
    border-radius: 0.3rem;
    outline: 0;
}

.modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #dee2e6;
    border-top-left-radius: calc(0.3rem - 1px);
    border-top-right-radius: calc(0.3rem - 1px);
}

.modal-title {
    margin-bottom: 0;
    line-height: 1.5;
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
    border-top: 1px solid #dee2e6;
    border-bottom-right-radius: calc(0.3rem - 1px);
    border-bottom-left-radius: calc(0.3rem - 1px);
}

.close {
    float: right;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    opacity: .5;
    cursor: pointer;
    background: transparent;
    border: 0;
}

.close:hover {
    color: #000;
    text-decoration: none;
    opacity: .75;
}

/* Utility classes */
.d-flex {
    display: flex;
}

.justify-content-between {
    justify-content: space-between;
}

.align-items-center {
    align-items: center;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 1rem;
}

.mb-0 {
    margin-bottom: 0 !important;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--secondary-color);
}

.mb-4 {
    margin-bottom: 1.5rem;
}

/* Form select */
.form-select {
    width: auto;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
    background-color: #fff;
    cursor: pointer;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    appearance: auto;
}

.form-select:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
}

/* Form check */
.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.form-check-input {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
    flex-shrink: 0;
}

.form-check-label {
    cursor: pointer;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .stat-info h3 {
        font-size: 1.5rem;
    }
    
    .navbar .container {
        flex-direction: column;
        padding: 10px;
    }
    
    .navbar-nav {
        margin-top: 1rem;
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-nav .nav-link {
        margin: 0.25rem 0;
        text-align: center;
    }
    
    .form-row {
        flex-direction: column;
        margin: 0;
    }
    
    .col-md-6,
    .col-md-4,
    .col-md-3,
    .col-md-12 {
        flex: 0 0 100%;
        max-width: 100%;
        padding: 0.25rem 0;
    }
}