/**
 * Simple Inventory Management System - Premium Stylesheet
 * Modern design with vibrant colors, glassmorphism, and smooth animations
 */

/* ===== CSS Variables ===== */
:root {
    /* Primary Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;

    /* Secondary Colors */
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;

    /* Neutral Colors */
    --dark-bg: #0f172a;
    --dark-card: #1e293b;
    --dark-border: #334155;
    --light-text: #f1f5f9;
    --muted-text: #94a3b8;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

    /* Shadows */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: var(--light-text);
    min-height: 100vh;
    line-height: 1.6;
}

/* ===== Navigation Bar ===== */
.navbar-custom {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--dark-border);
    box-shadow: var(--shadow-lg);
    padding: 1rem 0;
    /* Fix: Establish navbar as top stacking context so dropdowns
       are not trapped behind page content / cards with backdrop-filter */
    position: relative;
    z-index: 1050;
}

/* Fix: Ensure dropdown menus always render above all page layers */
.navbar-custom .dropdown-menu {
    z-index: 9999 !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--light-text) !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    color: var(--primary-light) !important;
    transform: translateY(-2px);
}

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

.nav-link {
    color: var(--muted-text) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover {
    color: var(--light-text) !important;
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.nav-link.active {
    color: var(--primary-light) !important;
    background: rgba(99, 102, 241, 0.2);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-welcome {
    color: var(--light-text);
    font-size: 0.9rem;
}

.navbar-toggler {
    border-color: var(--dark-border);
}

.dropdown-menu {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-lg);
}

.dropdown-item {
    color: var(--muted-text);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-item:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--light-text);
}

/* ===== Main Container ===== */
.main-container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    min-height: calc(100vh - 200px);
    /* Fix: Sit below navbar stacking context so dropdowns render on top */
    position: relative;
    z-index: 1;
}

/* ===== Cards ===== */
.card {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.card-header {
    background: rgba(99, 102, 241, 0.1);
    border-bottom: 1px solid var(--dark-border);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.card-body {
    padding: 1.5rem;
}

/* Allow horizontal scrolling for tables inside cards
   (the .card overflow:hidden clips table-responsive otherwise) */
.card-body>.table-responsive {
    overflow-x: auto;
}

.card:has(.table-responsive) {
    overflow: visible;
}

/* ===== Dashboard Cards ===== */
.stat-card {
    background: rgba(30, 41, 59, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.stat-card.success::before {
    background: var(--gradient-success);
}

.stat-card.danger::before {
    background: var(--gradient-danger);
}

.stat-card.warning::before {
    background: var(--gradient-warning);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    opacity: 0.3;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--light-text);
    margin-bottom: 0.25rem;
}

.stat-card .stat-label {
    color: var(--muted-text);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===== Buttons ===== */
.btn {
    border-radius: var(--radius-md);
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, #5568d3 0%, #6a3f8f 100%);
    color: white;
}

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

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

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

.btn-outline-light {
    border: 1px solid var(--light-text);
    color: var(--light-text);
}

.btn-outline-light:hover {
    background: var(--light-text);
    color: var(--dark-bg);
}

/* ===== Forms ===== */
.form-control,
.form-select {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid var(--dark-border);
    color: var(--light-text);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    background: rgba(30, 41, 59, 0.8);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    color: var(--light-text);
}

.form-label {
    color: var(--light-text);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

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

/* ===== Tables ===== */
.table {
    color: var(--light-text);
}

.table thead th {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--dark-border);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    padding: 1rem;
}

.table tbody tr {
    border-color: var(--dark-border);
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    background: rgba(99, 102, 241, 0.05);
    transform: scale(1.01);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
}

/* ===== Badges ===== */
.badge {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.85rem;
}

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

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

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

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

/* ===== Alerts ===== */
.alert {
    border-radius: var(--radius-lg);
    border: none;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fcd34d;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border-left: 4px solid var(--info-color);
}

/* ===== Pagination ===== */
.pagination {
    gap: 0.5rem;
}

.page-link {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--dark-border);
    color: var(--light-text);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.page-link:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
    color: var(--light-text);
}

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

/* ===== Footer ===== */
.footer {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--dark-border);
    padding: 1.5rem 0;
    text-align: center;
    color: var(--muted-text);
    margin-top: 3rem;
}

/* ===== Login Page ===== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card {
    max-width: 450px;
    width: 100%;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

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

.login-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--muted-text);
}

/* ===== DataTables Customization ===== */
.dataTables_wrapper {
    color: var(--light-text);
}

.dataTables_filter input,
.dataTables_length select {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid var(--dark-border);
    color: var(--light-text);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
}

.dataTables_info,
.dataTables_paginate {
    color: var(--muted-text);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .main-container {
        padding: 0 1rem;
        margin: 1rem auto;
    }

    .stat-card {
        margin-bottom: 1rem;
    }

    .navbar-user {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        margin-top: 1rem;
    }

    .table {
        font-size: 0.875rem;
    }

    .card-body {
        padding: 1rem;
    }
}

/* ===== Utility Classes ===== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--dark-border);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.transition-all {
    transition: all 0.3s ease;
}

/* ===== Loading Spinner ===== */
.spinner-border {
    border-color: var(--primary-color);
    border-right-color: transparent;
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--dark-border);
    border-radius: var(--radius-md);
}

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