/* ==========================================
   PRODUCT MANAGEMENT SPA - STYLES
   Modern, Flat Design with Corporate Look
   ========================================== */

/* ==========================================
   ROOT VARIABLES
   ========================================== */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #f3f4f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* ==========================================
   GLOBAL STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #fafafa;
}

/* ==========================================
   CONTAINER LAYOUT
   ========================================== */
.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: white;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

@media (min-width: 768px) {
    .container {
        height: auto;
        max-width: 1000px;
        margin: var(--spacing-lg) auto;
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
    }
}

/* ==========================================
   HEADER
   ========================================== */
.header {
    background: white;
    padding: var(--spacing-md) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (min-width: 768px) {
    .header {
        padding: var(--spacing-xl) var(--spacing-xl);
        border-bottom: 2px solid var(--primary-color);
    }
}

.header h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0;
}

@media (min-width: 768px) {
    .header h1 {
        font-size: 28px;
    }
}

.header p {
    font-size: 12px;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
    display: block;
}

@media (min-width: 768px) {
    .header p {
        font-size: 14px;
    }
}

/* ==========================================
   CONTENT AREA
   ========================================== */
.content-wrapper {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
}

@media (min-width: 768px) {
    .content-wrapper {
        padding: var(--spacing-xl);
    }
}

/* ==========================================
   SEARCH SECTION
   ========================================== */
.search-section {
    margin-bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

@media (min-width: 768px) {
    .search-section {
        flex-direction: row;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-xl);
    }
}

.search-input {
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    font-size: 14px;
    color: var(--text-dark);
    transition: border-color 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
    color: var(--text-light);
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    text-decoration: none;
    pointer-events: auto;
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

.btn-add {
    background-color: var(--primary-color);
    color: white;
    width: auto;
    pointer-events: auto;
    flex-shrink: 0;
}

.btn-add:hover {
    background-color: var(--primary-dark);
}

.btn-add:active {
    transform: scale(0.98);
}

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

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

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-dark);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #f0f1f3;
}

.btn-secondary:active {
    transform: scale(0.98);
}

.btn-edit, .btn-delete {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 11px;
    border-radius: var(--radius-md);
    width: auto;
    margin-right: var(--spacing-xs);
}

@media (min-width: 768px) {
    .btn-edit, .btn-delete {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 13px;
    }
}

.btn-edit {
    background-color: #0891b2;
    color: white;
}

.btn-edit:hover {
    background-color: #0e7490;
}

.btn-edit:active {
    transform: scale(0.98);
}

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

.btn-delete:hover {
    background-color: #dc2626;
}

.btn-delete:active {
    transform: scale(0.98);
}

/* ==========================================
   TABLE STYLES
   ========================================== */
.products-table {
    flex: 1;
    overflow-x: auto;
    overflow-y: auto;
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .products-table {
        margin-bottom: 0;
    }
}

/* Table Layout */
.products-card-list {
    display: none;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0;
    display: table;
}

.table thead {
    background-color: var(--secondary-color);
    position: sticky;
    top: 0;
}

.table thead th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 700;
    color: var(--text-dark);
    border-bottom: 2px solid var(--primary-color);
    font-size: 12px;
    white-space: nowrap;
}

@media (min-width: 768px) {
    .table thead th {
        padding: var(--spacing-lg);
        font-size: 14px;
    }
}

.table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: #f9fafb;
}

.table tbody td {
    padding: var(--spacing-sm);
    vertical-align: middle;
    font-size: 11px;
}

@media (min-width: 768px) {
    .table tbody td {
        padding: var(--spacing-lg);
        font-size: 14px;
    }
}

.table tbody td:last-child {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    justify-content: center;
}

/* ==========================================
   PRICE BADGE
   ========================================== */
.price-badge {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 10px;
    display: inline-block;
}

@media (min-width: 768px) {
    .price-badge {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 13px;
    }
}

/* ==========================================
   ALERTS
   ========================================== */
#alertContainer {
    margin-bottom: var(--spacing-lg);
}

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
}

.alert-success {
    background-color: #d1fae5;
    border-color: #6ee7b7;
    color: #065f46;
}

.alert-danger {
    background-color: #fee2e2;
    border-color: #fca5a5;
    color: #7f1d1d;
}

.alert .close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 16px;
    padding: 0;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.alert .close:hover {
    opacity: 1;
}

/* ==========================================
   NO PRODUCTS STATE
   ========================================== */
.no-products {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--text-light);
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.no-products p {
    font-size: 14px;
    margin: 0;
}

/* ==========================================
   LOADING SPINNER
   ========================================== */
.loading {
    display: none;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.spinner-border {
    border: 3px solid var(--secondary-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading p {
    color: var(--text-light);
    font-size: 14px;
}

/* ==========================================
   FORM CONTROLS
   ========================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
}

.form-control {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    font-size: 14px;
    color: var(--text-dark);
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
    color: var(--text-light);
}

/* ==========================================
   MODALS
   ========================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: flex-end;
    animation: slideUp 0.3s ease-out;
    padding: var(--spacing-md);
}

@media (min-width: 768px) {
    .modal {
        align-items: center;
        justify-content: center;
        padding: 0;
    }
}

.modal.show {
    display: flex;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

.modal-dialog {
    width: 100%;
    max-width: 100%;
    margin: 0;
    background: white;
    border-radius: 0;
    max-height: 90vh;
    overflow-y: auto;
}

@media (min-width: 768px) {
    .modal-dialog {
        max-width: 500px;
        margin: auto;
        border-radius: var(--radius-lg);
        max-height: 80vh;
    }
}

.modal-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    border: none;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--secondary-color);
    flex-shrink: 0;
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 28px;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
    margin-left: auto;
    flex-shrink: 0;
}

.modal-close:hover {
    color: var(--text-dark);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    background-color: var(--secondary-color);
    flex-shrink: 0;
}

/* ==========================================
   MODAL BACKDROP
   ========================================== */
.modal-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1040;
}

.modal-backdrop.show {
    display: block;
}

/* ==========================================
   RESPONSIVE ADJUSTMENTS
   ========================================== */
/* Desktop only layout */

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.mt-5 {
    margin-top: 0;
}

.fade {
    opacity: 1;
    transition: opacity 0.2s;
}

.fade.in,
.fade.show {
    opacity: 1;
}