/* ============================================
   Computer Shop Inventory - Modern CSS
   Mobile-First Responsive Design
   ============================================ */

/* ============================================
   CSS Variables & Theme Colors
   ============================================ */
:root {
    /* Primary Colors */
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --primary-lighter: #eff6ff;

    /* Secondary Colors */
    --secondary: #7c3aed;
    --secondary-dark: #6d28d9;

    /* Accent Colors */
    --accent: #f59e0b;
    --accent-dark: #d97706;

    /* Success/Warning/Error/Info */
    --success: #10b981;
    --success-bg: #d1fae5;
    --warning: #f59e0b;
    --warning-bg: #fef3c7;
    --danger: #ef4444;
    --danger-bg: #fee2e2;
    --info: #3b82f6;
    --info-bg: #dbeafe;

    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Semantic Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --bg-body: #f9fafb;
    --bg-white: #ffffff;

    /* 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Spacing */
    --sidebar-width: 260px;
    --topbar-height: 64px;
    --container-max-width: 1400px;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Helvetica Neue', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin-bottom: 1rem;
}

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

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

/* ============================================
   Layout Structure
   ============================================ */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-height);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 1000;
    color: white;
}

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

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.topbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

/* User Menu */
.user-menu {
    position: relative;
}

.user-menu-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition);
    font-size: 0.875rem;
}

.user-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.user-menu-toggle i.fa-user-circle {
    font-size: 1.5rem;
}

.badge-role {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition);
}

.user-menu:hover .user-menu-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-dropdown a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.user-menu-dropdown a:hover {
    background: var(--gray-50);
    color: var(--danger);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--topbar-height));
    background: white;
    box-shadow: var(--shadow-md);
    overflow-y: auto;
    overflow-x: hidden;
    transition: transform var(--transition-slow);
    z-index: 900;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: none; /* Hide on desktop, show on mobile */
}

.sidebar-header h3 {
    margin: 0;
    font-size: 1.125rem;
    color: var(--primary);
}

.sidebar-nav {
    padding: 1rem 0;
}

.sidebar-menu {
    list-style: none;
}

.menu-section {
    padding: 1.5rem 1.5rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.menu-item a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.menu-item a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary);
    transform: scaleY(0);
    transition: transform var(--transition);
}

.menu-item a i {
    width: 20px;
    text-align: center;
    font-size: 1.125rem;
}

.menu-item a:hover {
    background: var(--primary-lighter);
    color: var(--primary);
}

.menu-item.active a {
    background: var(--primary-lighter);
    color: var(--primary);
    font-weight: 600;
}

.menu-item.active a::before {
    transform: scaleY(1);
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    padding: 2rem;
    min-height: calc(100vh - var(--topbar-height));
    transition: margin-left var(--transition-slow);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

/* ============================================
   Page Header
   ============================================ */
.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header > div {
    flex: 1;
}

.page-header h1 {
    margin-bottom: 0.25rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: all var(--transition);
}

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

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--gray-50);
}

.card-header h2 {
    margin: 0;
    font-size: 1.125rem;
}

.card-body {
    padding: 1.5rem;
}

/* Statistics Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, white 0%, var(--gray-50) 100%);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

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

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-lighter) 0%, var(--primary-lighter) 100%);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

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

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

/* ============================================
   Alerts
   ============================================ */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: slideInDown var(--transition-slow);
}

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

.alert strong {
    font-weight: 600;
}

.alert-link {
    color: inherit;
    text-decoration: underline;
    font-weight: 600;
    margin-left: 0.5rem;
}

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

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

.alert-danger,
.alert-error {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: #991b1b;
}

.alert-info {
    background: var(--info-bg);
    border-color: var(--info);
    color: #1e40af;
}

/* ============================================
   Tables
   ============================================ */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table thead {
    background: var(--gray-50);
}

.table thead th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

.table tbody td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

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

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

/* ============================================
   Badges
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
}

.badge-sale {
    background: #dcfce7;
    color: #166534;
}

.badge-stock_in {
    background: #dbeafe;
    color: #1e40af;
}

.badge-stock_out {
    background: #fee2e2;
    color: #991b1b;
}

.badge-active {
    background: var(--success-bg);
    color: #065f46;
}

.badge-inactive {
    background: var(--gray-200);
    color: var(--gray-700);
}

.badge-admin {
    background: linear-gradient(135deg, #818cf8 0%, #6366f1 100%);
    color: white;
}

.badge-storekeeper {
    background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    color: white;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.badge-info {
    background: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 100%);
    color: white;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, var(--accent-dark) 100%);
    color: white;
}

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

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn i {
    font-size: 1rem;
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

label i {
    color: var(--primary);
    margin-right: 0.375rem;
    width: 16px;
    text-align: center;
}

.form-control,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
select,
textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--text-primary);
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition);
    font-family: inherit;
}

.form-control:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="search"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="datetime-local"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* Placeholder styling */
input::placeholder,
textarea::placeholder,
select::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

input:focus::placeholder,
textarea:focus::placeholder,
select:focus::placeholder {
    opacity: 0.5;
}

/* Number input spinner buttons */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    opacity: 1;
}

/* Disabled inputs */
input:disabled,
select:disabled,
textarea:disabled {
    background: var(--gray-100);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Remove autofill background color */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px white inset !important;
    -webkit-text-fill-color: var(--text-primary) !important;
}

/* Password input wrapper */
.password-input-wrapper {
    position: relative;
    display: block;
    width: 100%;
}

.password-input-wrapper input {
    padding-right: 3rem !important;
    width: 100%;
}

.password-toggle {
    position: absolute !important;
    right: 0.25rem !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    background: #f3f4f6 !important;
    border: 2px solid #d1d5db !important;
    border-radius: 0.375rem !important;
    padding: 0.5rem !important;
    cursor: pointer !important;
    color: #4b5563 !important;
    transition: all 0.2s ease !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 100 !important;
    height: 36px !important;
    width: 36px !important;
    min-width: 36px !important;
    flex-shrink: 0 !important;
}

.password-toggle:hover {
    color: white !important;
    background: #2563eb !important;
    border-color: #2563eb !important;
    transform: translateY(-50%) scale(1.05) !important;
}

.password-toggle:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.password-toggle:active {
    background: var(--gray-200);
    transform: translateY(-50%) scale(0.95);
}

.password-toggle i {
    font-size: 1rem;
    pointer-events: none;
    display: block;
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.readonly-input,
input[readonly],
input:read-only {
    background: var(--gray-50) !important;
    color: var(--text-muted) !important;
    cursor: not-allowed;
}

/* Form helper text */
.form-text,
small.form-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* Input with icons */
.input-group {
    position: relative;
    display: flex;
    align-items: stretch;
}

.input-group input {
    flex: 1;
}

/* Form validation states */
input.is-invalid,
select.is-invalid,
textarea.is-invalid {
    border-color: var(--danger);
}

input.is-valid,
select.is-valid,
textarea.is-valid {
    border-color: var(--success);
}

.invalid-feedback {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.8125rem;
    color: var(--danger);
}

.valid-feedback {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.8125rem;
    color: var(--success);
}

/* Form specific styles */
.transaction-form {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.form-actions {
    display: flex;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 1.5rem;
}

.info-box {
    background: linear-gradient(135deg, var(--info-bg) 0%, #f0f9ff 100%);
    border-left: 4px solid var(--info);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.info-box h4 {
    color: var(--info);
    font-size: 1rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-box h4::before {
    content: '\f05a';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
}

.info-box p {
    margin: 0.5rem 0;
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.info-box p:last-child {
    margin-bottom: 0;
}

.info-box strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   Login Page
   ============================================ */
.login-page {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: 2.5rem;
    animation: fadeInUp var(--transition-slow);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.login-header h1 {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
    margin: 0;
}

.login-form {
    margin-bottom: 1.5rem;
}

.login-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.login-footer .text-muted {
    font-size: 0.875rem;
}

/* ============================================
   Profile Page
   ============================================ */
.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.account-detail-item {
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.detail-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
    font-weight: 600;
}

.detail-label i {
    color: var(--primary);
    margin-right: 0.5rem;
    width: 16px;
    text-align: center;
}

.detail-value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.security-tips {
    list-style: none;
    padding: 0;
    margin: 0;
}

.security-tips li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.security-tips li:last-child {
    border-bottom: none;
}

.security-tips li i {
    font-size: 1.125rem;
    flex-shrink: 0;
}

/* Responsive profile grid */
@media (max-width: 767px) {
    .profile-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Action Buttons
   ============================================ */
.action-buttons {
    display: flex;
    gap: 0.375rem;
    align-items: center;
    flex-wrap: wrap;
}

.action-buttons .btn {
    padding: 0.375rem 0.625rem;
}

.action-buttons .btn i {
    margin: 0;
}

/* Responsive action buttons */
@media (max-width: 767px) {
    .action-buttons {
        gap: 0.25rem;
    }

    .action-buttons .btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.75rem;
    }
}

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

.empty-state i {
    font-size: 3rem;
    color: var(--gray-300);
    margin-bottom: 1rem;
    display: block;
}

.empty-state h3 {
    color: var(--text-secondary);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.empty-state .btn {
    margin-top: 1rem;
}

/* ============================================
   Modals
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn var(--transition);
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideInUp var(--transition-slow);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--gray-50);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--primary);
}

.modal-header .close {
    font-size: 1.75rem;
    font-weight: 300;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}

.modal-header .close:hover {
    color: var(--danger);
    background: var(--danger-bg);
}

.modal-content form {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    background: var(--gray-50);
    margin: 0 -1.5rem -1.5rem;
}

/* ============================================
   Utilities
   ============================================ */
.text-muted {
    color: var(--text-muted);
}

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

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

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

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

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* ============================================
   Mobile Sidebar Toggle
   ============================================ */
.sidebar.collapsed {
    transform: translateX(-100%);
}

body.sidebar-open {
    overflow: hidden;
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 899;
}

body.sidebar-open .sidebar-overlay {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   Responsive Design - Mobile First
   ============================================ */

/* Mobile devices (< 768px) */
@media (max-width: 767px) {
    :root {
        --sidebar-width: 280px;
        --topbar-height: 56px;
    }

    .topbar {
        padding: 0 1rem;
    }

    .topbar-brand {
        font-size: 1rem;
    }

    .user-menu-toggle span {
        display: none;
    }

    .user-menu-toggle {
        padding: 0.5rem;
    }

    .badge-role {
        display: none;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-header {
        display: block;
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.125rem; }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-icon {
        font-size: 2rem;
        width: 50px;
        height: 50px;
    }

    .stat-info h3 {
        font-size: 1.5rem;
    }

    .card-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .card-body {
        padding: 1rem;
    }

    .table {
        font-size: 0.8125rem;
    }

    .table thead th,
    .table tbody td {
        padding: 0.625rem 0.5rem;
    }

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

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .transaction-form {
        padding: 1.25rem;
    }

    .login-card {
        padding: 1.5rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .modal-content {
        max-width: 100%;
        margin: 0 0.5rem;
    }

    .modal-header {
        padding: 1rem;
    }

    .modal-header h2 {
        font-size: 1rem;
    }

    .modal-content form {
        padding: 1rem;
    }

    .modal-footer {
        flex-direction: column;
        gap: 0.5rem;
    }

    .modal-footer .btn {
        width: 100%;
    }
}

/* Tablets (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .main-content {
        padding: 1.5rem;
    }

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

/* Tablets in landscape and small desktops */
@media (min-width: 1024px) {
    .sidebar-toggle {
        display: none;
    }
}

/* Large desktops */
@media (min-width: 1400px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Print styles */
@media print {
    .topbar,
    .sidebar,
    .sidebar-toggle,
    .btn,
    .alert {
        display: none !important;
    }

    .main-content {
        margin: 0;
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid var(--border-color);
        page-break-inside: avoid;
    }
}

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

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

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

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

/* ============================================
   Animations
   ============================================ */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Skeleton loading */
.skeleton {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Fade in animation */
.fade-in {
    animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   Focus Visible (Accessibility)
   ============================================ */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline-offset: 4px;
}