/* ==================== CSS VARIABLES & COLORS ==================== */
:root {
    --color-blue: #1976D2;
    --color-orange: #F57C00;
    --color-green: #388E3C;
    --color-red: #D32F2F;
    --color-warning: #FBC02D;
    --color-grey-50: #FAFAFA;
    --color-grey-100: #F5F5F5;
    --color-grey-200: #EEEEEE;
    --color-grey-300: #E0E0E0;
    --color-grey-500: #9E9E9E;
    --color-grey-700: #616161;
    --color-grey-900: #212121;
    --color-bg: #F5F5F5;
    --color-bg-dark: #424242;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #E0E0E0;
    --color-shadow: rgba(0, 0, 0, 0.1);

    --sidebar-width: 250px;
    --topbar-height: 60px;
    --spacing-unit: 8px;
    --border-radius: 4px;
    --transition: 0.2s ease-in-out;
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: 'Roboto', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* ==================== LAYOUT ==================== */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--color-grey-900);
    color: white;
    display: flex;
    flex-direction: column;
    box-shadow: 2px 0 8px var(--color-shadow);
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-blue);
    letter-spacing: 2px;
}

.logo-version {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all var(--transition);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
}

.nav-item.active {
    background-color: rgba(25, 118, 210, 0.1);
    color: var(--color-blue);
    border-left-color: var(--color-blue);
}

.nav-item i {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.version-info {
    display: flex;
    flex-direction: column;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    gap: 4px;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-bar {
    height: var(--topbar-height);
    background-color: white;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 2px 4px var(--color-shadow);
    padding: 0 24px;
}

.top-bar-content {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.page-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--color-text);
}

.top-bar-actions {
    display: flex;
    gap: 12px;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-grey-700);
    border-radius: 50%;
    transition: all var(--transition);
}

.btn-icon:hover {
    background-color: var(--color-grey-100);
    color: var(--color-blue);
}

.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

/* ==================== CONTENT & WIDGETS ==================== */
.dashboard-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.widget-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.widget-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px var(--color-shadow);
    overflow: hidden;
    transition: box-shadow var(--transition);
    border-left: 4px solid transparent;
}

.widget-card:hover {
    box-shadow: 0 4px 12px var(--color-shadow);
}

.stat-card {
    border-left-color: var(--color-blue);
}

.widget-header {
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
}

.widget-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    margin: 0;
}

.widget-subtitle {
    font-size: 12px;
    color: var(--color-text-light);
    margin: 4px 0 0;
}

.widget-body {
    padding: 16px;
}

.stat-body {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.stat-icon {
    font-size: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--color-grey-100);
}

.stat-icon i {
    font-size: 32px !important;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
}

/* ==================== TABLES ==================== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table thead {
    background-color: var(--color-grey-100);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--color-grey-700);
    border-bottom: 2px solid var(--color-border);
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--color-grey-200);
}

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

.data-table tbody tr:hover {
    background-color: var(--color-grey-50);
}

.data-table tbody tr.low-stock {
    background-color: rgba(211, 47, 47, 0.05);
}

.data-table-nested {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    margin-top: 12px;
}

.data-table-nested th {
    background-color: var(--color-grey-100);
    padding: 8px;
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--color-border);
}

.data-table-nested td {
    padding: 8px;
    border-bottom: 1px solid var(--color-grey-200);
}

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

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

.text-bold {
    font-weight: 600;
}

.text-danger {
    color: var(--color-red);
}

.text-warning {
    color: var(--color-orange);
}

.text-success {
    color: var(--color-green);
}

.text-orange {
    color: var(--color-orange);
}

/* ==================== BUTTONS ==================== */
.btn {
    padding: 10px 16px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background-color: #1565C0;
    box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all var(--transition);
}

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

.btn-info:hover {
    background-color: rgba(25, 118, 210, 0.1);
}

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

.btn-warning:hover {
    background-color: rgba(245, 124, 0, 0.1);
}

.btn-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: all var(--transition);
}

.btn-close:hover {
    background-color: var(--color-grey-100);
}

/* ==================== BADGES & STATUS ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
}

.badge i {
    font-size: 14px !important;
}

.badge-success {
    background-color: rgba(56, 142, 60, 0.1);
    color: var(--color-green);
}

.badge-warning {
    background-color: rgba(251, 192, 45, 0.1);
    color: #F57F17;
}

.badge-danger {
    background-color: rgba(211, 47, 47, 0.1);
    color: var(--color-red);
}

.status-draft {
    background-color: rgba(158, 158, 158, 0.1);
    color: var(--color-grey-700);
}

.status-confirmed {
    background-color: rgba(25, 118, 210, 0.1);
    color: var(--color-blue);
}

.status-partially_received {
    background-color: rgba(245, 124, 0, 0.1);
    color: var(--color-orange);
}

.status-received {
    background-color: rgba(56, 142, 60, 0.1);
    color: var(--color-green);
}

.status-cancelled {
    background-color: rgba(211, 47, 47, 0.1);
    color: var(--color-red);
}

/* ==================== ALERTS ==================== */
.alert {
    padding: 12px 16px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    margin-bottom: 16px;
}

.alert i {
    font-size: 20px !important;
}

.alert-info {
    background-color: rgba(25, 118, 210, 0.1);
    color: var(--color-blue);
}

.alert-warning {
    background-color: rgba(245, 124, 0, 0.1);
    color: var(--color-orange);
}

.alert-danger {
    background-color: rgba(211, 47, 47, 0.1);
    color: var(--color-red);
}

/* ==================== PAGE ELEMENTS ==================== */
.page-header {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    align-items: center;
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.stat-summary {
    background-color: white;
    padding: 16px;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-blue);
    box-shadow: 0 2px 4px var(--color-shadow);
}

.stat-label {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
}

/* ==================== MODAL ==================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: white;
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 18px;
    margin: 0;
    color: var(--color-text);
}

.modal-body {
    padding: 20px;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-item label {
    font-size: 12px;
    color: var(--color-text-light);
    font-weight: 600;
    text-transform: uppercase;
}

.detail-item span {
    font-size: 14px;
    color: var(--color-text);
}

/* ==================== HIGHLIGHTS ==================== */
.highlight-danger {
    background-color: rgba(211, 47, 47, 0.05) !important;
}

.small-icon {
    font-size: 16px !important;
    vertical-align: middle;
    margin-left: 4px;
}

/* ==================== SCROLLBAR ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-grey-300);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-grey-500);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .nav-item span {
        display: none;
    }

    .logo-version {
        display: none;
    }

    .widget-row {
        grid-template-columns: 1fr;
    }

    .detail-grid {
        grid-template-columns: 1fr;
    }

    .stat-body {
        flex-direction: column;
    }
}