/* ===============================================
   MODERN MINIMAL THEME - Inventory Management
   Professional, Clean, and User-Friendly
   =============================================== */

:root {
    /* Modern Color Palette */
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #dbeafe;
    --secondary: #64748b;
    --success: #10b981;
    --success-light: #d1fae5;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --info: #06b6d4;
    --info-light: #cffafe;
    
    /* Neutral Colors */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Layout */
    --sidebar-width: 260px;
    --topbar-height: 70px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
}

/* ===============================================
   BASE STYLES
   =============================================== */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===============================================
   SIDEBAR
   =============================================== */

.sidebar {
    position: fixed !important;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    height: 100vh;
    height: 100dvh;
    background: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: white;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.3s ease;
}

.sidebar-header {
    flex-shrink: 0;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: var(--gray-900);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: white;
}

.brand i {
    font-size: 1.75rem;
    color: var(--primary);
}

.sidebar-nav {
    flex: 1 1 auto;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem 0;
}

.nav-section {
    padding: 1rem 1.5rem 0.5rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--gray-300);
    text-decoration: none;
    transition: all 0.2s ease;
    position: relative;
    gap: 0.75rem;
}

.nav-item i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

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

.nav-item.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary);
}

.badge-danger {
    background: var(--danger);
    color: white;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.7rem;
    margin-left: auto;
}

/* ===============================================
   MAIN CONTENT
   =============================================== */

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

/* ===============================================
   TOPBAR
   =============================================== */

.topbar {
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-menu .btn-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--gray-700);
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: all 0.2s;
}

.user-menu .btn-link:hover {
    background: var(--gray-100);
}

.user-avatar {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

.user-name {
    font-weight: 500;
}

/* ===============================================
   PAGE CONTENT
   =============================================== */

.page-content {
    padding: 2rem;
    max-width: 1400px;
}

/* ===============================================
   CARDS
   =============================================== */

.card {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    background: white;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: white;
    border-bottom: 2px solid var(--gray-100);
    padding: 1.25rem 1.5rem;
}

.card-header h5 {
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
}

/* Stat Cards */
.stat-card {
    background: white;
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.stat-icon.primary {
    background: var(--primary-light);
    color: var(--primary);
}

.stat-icon.success {
    background: var(--success-light);
    color: var(--success);
}

.stat-icon.warning {
    background: var(--warning-light);
    color: var(--warning);
}

.stat-icon.danger {
    background: var(--danger-light);
    color: var(--danger);
}

.stat-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    color: var(--gray-900);
}

.stat-info p {
    margin: 0;
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ===============================================
   TABLES
   =============================================== */

.table-responsive {
    border-radius: var(--radius);
    overflow: hidden;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--gray-50);
    border-bottom: 2px solid var(--gray-200);
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 1rem;
    white-space: nowrap;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
}

.table tbody tr {
    transition: background 0.2s ease;
}

.table tbody tr:hover {
    background: var(--gray-50);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ===============================================
   BUTTONS
   =============================================== */

.btn {
    border-radius: var(--radius);
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    border: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

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

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

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

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

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

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

/* ===============================================
   BADGES
   =============================================== */

.badge {
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
    font-weight: 500;
    font-size: 0.75rem;
}

.badge.bg-success {
    background: var(--success-light) !important;
    color: var(--success);
}

.badge.bg-danger {
    background: var(--danger-light) !important;
    color: var(--danger);
}

.badge.bg-warning {
    background: var(--warning-light) !important;
    color: var(--warning);
}

.badge.bg-info {
    background: var(--info-light) !important;
    color: var(--info);
}

.badge.bg-primary {
    background: var(--primary-light) !important;
    color: var(--primary);
}

/* ===============================================
   FORMS
   =============================================== */

.form-control,
.form-select {
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    background: white;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

.form-label {
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.form-text {
    color: var(--gray-500);
    font-size: 0.75rem;
}

/* ===============================================
   ALERTS
   =============================================== */

.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.modern-alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.modern-alert i {
    font-size: 1.25rem;
}

.alert-success {
    background: var(--success-light);
    color: #065f46;
}

.alert-danger {
    background: var(--danger-light);
    color: #991b1b;
}

.alert-warning {
    background: var(--warning-light);
    color: #92400e;
}

.alert-info {
    background: var(--info-light);
    color: #0e7490;
}

/* ===============================================
   LOGIN PAGE
   =============================================== */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
}

.login-page .card {
    max-width: 450px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-lg);
}

.login-page .card-body {
    padding: 2.5rem;
}

/* ===============================================
   UTILITIES
   =============================================== */

.text-muted {
    color: var(--gray-500) !important;
}

code {
    background: var(--gray-100);
    color: var(--primary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
}

/* ===============================================
   PAGINATION
   =============================================== */

.pagination {
    gap: 0.25rem;
}

.page-link {
    border: none;
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    color: var(--gray-700);
    font-weight: 500;
    transition: all 0.2s;
}

.page-link:hover {
    background: var(--gray-100);
}

.page-item.active .page-link {
    background: var(--primary);
    color: white;
}

/* ===============================================
   PROGRESS BARS
   =============================================== */

.progress {
    height: 8px;
    border-radius: 9999px;
    background: var(--gray-200);
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    border-radius: 9999px;
    transition: width 0.3s ease;
}

/* ===============================================
   RESPONSIVE
   =============================================== */

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .page-content {
        padding: 1rem;
    }
    
    .topbar {
        padding: 0 1rem;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
}

/* ===============================================
   PRINT STYLES
   =============================================== */

@media print {
    .sidebar,
    .topbar,
    .no-print,
    .btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    body {
        background: white;
    }
}

/* ===============================================
   ANIMATIONS
   =============================================== */

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

.card {
    animation: fadeIn 0.3s ease;
}

/* ===============================================
   SCROLLBAR
   =============================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 9999px;
}

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

.sidebar-nav::-webkit-scrollbar {
    width: 6px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 9999px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.35);
}