/*
 * Inventory Tracker - Custom Styles
 * Modern, clean design for university inventory management
 */

/* ============================================
   CSS Variables (Easy customization)
   ============================================ */
:root {
    --primary-color: #4361ee;
    --primary-dark: #3651d4;
    --secondary-color: #7209b7;
    --success-color: #06d6a0;
    --warning-color: #ffd166;
    --danger-color: #ef476f;
    --info-color: #118ab2;
    --dark-color: #1d3557;
    --light-color: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-500: #adb5bd;
    --gray-700: #495057;
    --sidebar-width: 250px;
    --navbar-height: 60px;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f0f2f5;
    color: var(--dark-color);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* ============================================
   Navbar Styles
   ============================================ */
.navbar-custom {
    background: linear-gradient(135deg, var(--dark-color) 0%, #2d4a6f 100%);
    padding: 0.75rem 1.5rem;
    box-shadow: var(--box-shadow);
    border: none;
}

.navbar-custom .navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    color: #fff !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-custom .navbar-brand i {
    font-size: 1.6rem;
    color: var(--success-color);
}

.navbar-custom .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    padding: 0.6rem 1rem !important;
    border-radius: 8px;
    margin: 0 0.15rem;
    transition: var(--transition);
}

.navbar-custom .nav-link:hover,
.navbar-custom .nav-link.active {
    color: #fff !important;
    background: rgba(255, 255, 255, 0.15);
}

.navbar-custom .nav-link i {
    margin-right: 0.4rem;
}

.navbar-custom .dropdown-menu {
    border: none;
    box-shadow: var(--box-shadow-lg);
    border-radius: var(--border-radius);
    padding: 0.5rem;
}

.navbar-custom .dropdown-item {
    border-radius: 8px;
    padding: 0.6rem 1rem;
}

.navbar-custom .dropdown-item:hover {
    background-color: var(--gray-100);
}

/* ============================================
   Card Styles
   ============================================ */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    overflow: hidden;
}

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

.card-header {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 600;
    padding: 1rem 1.25rem;
}

.card-body {
    padding: 1.25rem;
}

/* Stat Cards */
.stat-card {
    border-radius: var(--border-radius);
    padding: 1.5rem;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(30deg);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    opacity: 0.8;
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
}

.stat-card h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-card p {
    margin: 0;
    opacity: 0.9;
    font-weight: 500;
}

.stat-card.primary { background: linear-gradient(135deg, var(--primary-color), #6c7ae0); }
.stat-card.success { background: linear-gradient(135deg, var(--success-color), #0abf8a); }
.stat-card.warning { background: linear-gradient(135deg, #f59e0b, var(--warning-color)); color: var(--dark-color); }
.stat-card.danger { background: linear-gradient(135deg, var(--danger-color), #f472b6); }
.stat-card.info { background: linear-gradient(135deg, var(--info-color), #38bdf8); }
.stat-card.secondary { background: linear-gradient(135deg, var(--secondary-color), #a855f7); }

/* ============================================
   Table Styles
   ============================================ */
.table {
    margin-bottom: 0;
}

.table thead th {
    background: var(--dark-color);
    color: #fff;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    padding: 1rem;
    border: none;
}

.table tbody td {
    padding: 0.875rem 1rem;
    vertical-align: middle;
    border-color: var(--gray-200);
}

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

.table tbody tr:hover {
    background-color: var(--gray-100);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

/* ============================================
   Button Styles
   ============================================ */
.btn {
    font-weight: 500;
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    transition: var(--transition);
    border: none;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #5a72eb);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #0abf8a);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #f472b6);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b, var(--warning-color));
    color: var(--dark-color);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #38bdf8);
    color: #fff;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--gray-500), var(--gray-700));
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.1rem;
}

/* ============================================
   Badge Styles
   ============================================ */
.badge {
    font-weight: 500;
    padding: 0.4em 0.8em;
    border-radius: 6px;
    font-size: 0.75rem;
}

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

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

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

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

/* Status badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35em 0.75em;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.status-badge.in-stock {
    background: rgba(6, 214, 160, 0.15);
    color: #059669;
}

.status-badge.low-stock {
    background: rgba(239, 71, 111, 0.15);
    color: var(--danger-color);
}

/* ============================================
   Form Styles
   ============================================ */
.form-control,
.form-select {
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    padding: 0.7rem 1rem;
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

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

.input-group-text {
    background: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-radius: 8px;
}

/* ============================================
   Alert Styles
   ============================================ */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: rgba(6, 214, 160, 0.15);
    color: #059669;
}

.alert-danger {
    background: rgba(239, 71, 111, 0.15);
    color: #dc2626;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #d97706;
}

.alert-info {
    background: rgba(17, 138, 178, 0.15);
    color: var(--info-color);
}

/* ============================================
   Login/Register Page Styles
   ============================================ */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--dark-color) 0%, #2d4a6f 50%, var(--primary-color) 100%);
    padding: 2rem;
}

.auth-card {
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    width: 100%;
    max-width: 420px;
}

.auth-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 2.5rem 2rem;
    text-align: center;
}

.auth-header .logo-icon {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
}

.auth-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.auth-header p {
    opacity: 0.9;
    margin: 0;
}

.auth-body {
    padding: 2rem;
}

.auth-footer {
    text-align: center;
    padding: 1.5rem 2rem;
    background: var(--gray-100);
    border-top: 1px solid var(--gray-200);
}

/* ============================================
   Dashboard Specific Styles
   ============================================ */
.page-header {
    margin-bottom: 1.5rem;
}

.page-header h2 {
    font-weight: 700;
    color: var(--dark-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-header .welcome-text {
    color: var(--gray-500);
    font-size: 0.95rem;
}

.quick-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Transaction list item */
.transaction-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.transaction-item:last-child {
    border-bottom: none;
}

.transaction-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-size: 1.1rem;
}

.transaction-icon.in {
    background: rgba(6, 214, 160, 0.15);
    color: var(--success-color);
}

.transaction-icon.out {
    background: rgba(239, 71, 111, 0.15);
    color: var(--danger-color);
}

.transaction-details {
    flex: 1;
}

.transaction-details .item-name {
    font-weight: 600;
    color: var(--dark-color);
}

.transaction-details .meta {
    font-size: 0.8rem;
    color: var(--gray-500);
}

.transaction-qty {
    font-weight: 700;
    font-size: 0.95rem;
}

/* Low stock item */
.low-stock-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: rgba(239, 71, 111, 0.08);
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.low-stock-item:last-child {
    margin-bottom: 0;
}

.low-stock-item .item-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.low-stock-item .warning-icon {
    color: var(--danger-color);
    font-size: 1.25rem;
}

.low-stock-item .item-name {
    font-weight: 600;
}

.low-stock-item .stock-level {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* ============================================
   Stock Transaction Page
   ============================================ */
.transaction-type-selector {
    display: flex;
    gap: 0.5rem;
}

.transaction-type-selector .btn-check:checked + .btn-outline-success {
    background: var(--success-color);
    border-color: var(--success-color);
    color: #fff;
}

.transaction-type-selector .btn-check:checked + .btn-outline-danger {
    background: var(--danger-color);
    border-color: var(--danger-color);
    color: #fff;
}

.transaction-type-selector .btn {
    flex: 1;
    padding: 1rem;
    font-weight: 600;
}

/* ============================================
   Reports Page
   ============================================ */
.report-filter-card {
    background: linear-gradient(135deg, var(--gray-100), #fff);
}

.report-summary-card {
    text-align: center;
    padding: 1.5rem;
}

.report-summary-card .icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
    font-size: 1.5rem;
}

.report-summary-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
}

.empty-state .icon {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: 1rem;
}

.empty-state h4 {
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--gray-500);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    .stat-card h2 {
        font-size: 1.75rem;
    }

    .stat-card .stat-icon {
        font-size: 2rem;
        right: 1rem;
    }

    .navbar-custom .nav-link {
        padding: 0.5rem 0.75rem !important;
    }

    .auth-card {
        margin: 1rem;
    }

    .auth-header {
        padding: 2rem 1.5rem;
    }

    .auth-body {
        padding: 1.5rem;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .no-print, .navbar-custom, .btn, .nav-tabs, form.row { display: none !important; }

    body { background: #fff; color: #000; font-size: 12px; }

    .container { max-width: 100% !important; padding: 0 !important; margin: 0 !important; }

    .card {
        box-shadow: none;
        border: none !important;
        margin-bottom: 8px !important;
    }

    .card-header { background: #fff !important; border-bottom: 1px solid #999 !important; }

    .table { font-size: 11px; }
    .table thead th {
        background: #f0f0f0 !important;
        color: #000 !important;
        border-bottom: 1px solid #000 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    .table td, .table th { padding: 4px 6px !important; }

    .badge, .status-badge {
        border: 1px solid #555 !important;
        color: #000 !important;
        background: #fff !important;
    }

    .alert { border: 1px solid #999 !important; background: #fff !important; color: #000 !important; }

    a[href]:after { content: "" !important; }

    @page { margin: 12mm; }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hover-lift {
    transition: var(--transition);
}

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

.rounded-xl {
    border-radius: var(--border-radius);
}

.shadow-custom {
    box-shadow: var(--box-shadow);
}

.shadow-custom-lg {
    box-shadow: var(--box-shadow-lg);
}