/* Base styles */
:root {
    /* Primary colors */
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --primary-active: #0a58ca;
    --primary-light: rgba(13, 110, 253, 0.1);
    
    /* Success colors */
    --success-color: #198754;
    --success-hover: #157347;
    --success-active: #146c43;
    --success-light: rgba(25, 135, 84, 0.1);
    
    /* Warning colors */
    --warning-color: #ffc107;
    --warning-hover: #ffca2c;
    --warning-active: #ffcd39;
    --warning-light: rgba(255, 193, 7, 0.1);
    
    /* Danger colors */
    --danger-color: #dc3545;
    --danger-hover: #bb2d3b;
    --danger-active: #b02a37;
    --danger-light: rgba(220, 53, 69, 0.1);
    
    /* Info colors */
    --info-color: #0dcaf0;
    --info-hover: #31d2f2;
    --info-active: #3dd5f3;
    --info-light: rgba(13, 202, 240, 0.1);
    
    /* Secondary colors */
    --secondary-color: #6c757d;
    --secondary-hover: #5c636a;
    --secondary-active: #565e64;
    --secondary-light: rgba(108, 117, 125, 0.1);
    
    /* Dark colors */
    --dark-color: #212529;
    --dark-hover: #1c1f23;
    --dark-active: #1a1e21;
    --dark-light: rgba(33, 37, 41, 0.1);
    
    /* Light colors */
    --light-color: #f8f9fa;
    --light-hover: #e9ecef;
    --light-active: #dde2e6;
    --light-dark: rgba(248, 249, 250, 0.1);
    
    /* Gray colors */
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Text colors */
    --primary-text: #1e293b;
    --primary-text: #1e293b;
    --text-muted: #6c757d;
    --text-light: #f8f9fa;
    
    /* Border colors */
    --border-color: #dee2e6;
    --border-light: #e9ecef;
    --border-dark: #adb5bd;
    
    /* Background colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --bg-dark: #212529;
    
    /* Shadow colors */
    --shadow-sm: rgba(0, 0, 0, 0.05);
    --shadow-md: rgba(0, 0, 0, 0.075);
    --shadow-lg: rgba(0, 0, 0, 0.15);
}

body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 500;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

.display-4 {
    font-size: 2.5rem;
    font-weight: 300;
    line-height: 1.2;
}

/* Form styles */
.form-control {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.25rem var(--primary-light);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--bg-secondary);
    opacity: 1;
}

.form-control-lg {
    min-height: calc(1.5em + 1rem + 2px);
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
    border-radius: 0.375rem;
}

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

.form-text {
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Button styles */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    border-radius: 0.375rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn:hover {
    color: var(--text-primary);
}

.btn:focus {
    outline: 0;
    box-shadow: 0 0 0 0.25rem var(--primary-light);
}

.btn:disabled,
.btn.disabled {
    pointer-events: none;
    opacity: 0.65;
}

.btn-primary {
    color: var(--text-light);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    color: var(--text-light);
    background-color: var(--primary-hover);
    border-color: var(--primary-active);
}

.btn-primary:focus {
    color: var(--text-light);
    background-color: var(--primary-hover);
    border-color: var(--primary-active);
    box-shadow: 0 0 0 0.25rem var(--primary-light);
}

.btn-primary:active {
    color: var(--text-light);
    background-color: var(--primary-active);
    border-color: var(--primary-active);
}

.btn-primary:disabled,
.btn-primary.disabled {
    color: var(--text-light);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-success {
    color: var(--text-light);
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-success:hover {
    color: var(--text-light);
    background-color: var(--success-hover);
    border-color: var(--success-active);
}

.btn-success:focus {
    color: var(--text-light);
    background-color: var(--success-hover);
    border-color: var(--success-active);
    box-shadow: 0 0 0 0.25rem var(--success-light);
}

.btn-success:active {
    color: var(--text-light);
    background-color: var(--success-active);
    border-color: var(--success-active);
}

.btn-success:disabled,
.btn-success.disabled {
    color: var(--text-light);
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-warning {
    color: var(--text-primary);
    background-color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-warning:hover {
    color: var(--text-primary);
    background-color: var(--warning-hover);
    border-color: var(--warning-active);
}

.btn-warning:focus {
    color: var(--text-primary);
    background-color: var(--warning-hover);
    border-color: var(--warning-active);
    box-shadow: 0 0 0 0.25rem var(--warning-light);
}

.btn-warning:active {
    color: var(--text-primary);
    background-color: var(--warning-active);
    border-color: var(--warning-active);
}

.btn-warning:disabled,
.btn-warning.disabled {
    color: var(--text-primary);
    background-color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-danger {
    color: var(--text-light);
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-danger:hover {
    color: var(--text-light);
    background-color: var(--danger-hover);
    border-color: var(--danger-active);
}

.btn-danger:focus {
    color: var(--text-light);
    background-color: var(--danger-hover);
    border-color: var(--danger-active);
    box-shadow: 0 0 0 0.25rem var(--danger-light);
}

.btn-danger:active {
    color: var(--text-light);
    background-color: var(--danger-active);
    border-color: var(--danger-active);
}

.btn-danger:disabled,
.btn-danger.disabled {
    color: var(--text-light);
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-secondary {
    color: var(--text-light);
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    color: var(--text-light);
    background-color: var(--secondary-hover);
    border-color: var(--secondary-active);
}

.btn-secondary:focus {
    color: var(--text-light);
    background-color: var(--secondary-hover);
    border-color: var(--secondary-active);
    box-shadow: 0 0 0 0.25rem var(--secondary-light);
}

.btn-secondary:active {
    color: var(--text-light);
    background-color: var(--secondary-active);
    border-color: var(--secondary-active);
}

.btn-secondary:disabled,
.btn-secondary.disabled {
    color: var(--text-light);
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-lg {
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
    border-radius: 0.375rem;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    border-radius: 0.25rem;
}

/* Card styles */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: var(--bg-primary);
    background-clip: border-box;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem var(--shadow-md);
}

.card-body {
    flex: 1 1 auto;
    padding: 1.5rem;
}

.card-title {
    margin-bottom: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Table styles */
.table-responsive {
    overflow-x: auto;
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem var(--shadow-md);
}

.table {
    width: 100%;
    margin-bottom: 1rem;
    color: var(--text-primary);
    vertical-align: top;
    border-color: var(--border-color);
}

.table > :not(caption) > * > * {
    padding: 0.75rem;
    background-color: var(--bg-primary);
    border-bottom-width: 1px;
    box-shadow: inset 0 0 0 9999px transparent;
}

.table > tbody {
    vertical-align: inherit;
}

.table > thead {
    vertical-align: bottom;
}

.table-hover tbody tr:hover {
    background-color: var(--primary-light);
}

.table th {
    font-weight: 600;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    color: var(--text-secondary);
    vertical-align: middle;
}

/* Badge styles */
.badge {
    display: inline-block;
    padding: 0.5em 0.75em;
    font-size: 0.75em;
    font-weight: 500;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.375rem;
}

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

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

.bg-warning {
    background-color: var(--warning-color) !important;
    color: var(--text-primary) !important;
}

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

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

.bg-secondary {
    background-color: var(--secondary-color) !important;
    color: var(--text-light) !important;
}

/* Modal styles */
.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    pointer-events: auto;
    background-color: var(--bg-primary);
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    outline: 0;
    box-shadow: 0 0.5rem 1rem var(--shadow-lg);
}

.modal-header {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    border-top-left-radius: calc(0.5rem - 1px);
    border-top-right-radius: calc(0.5rem - 1px);
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    flex-wrap: wrap;
    flex-shrink: 0;
    align-items: center;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    border-bottom-right-radius: calc(0.5rem - 1px);
    border-bottom-left-radius: calc(0.5rem - 1px);
}

.modal-dialog-centered {
    display: flex;
    align-items: center;
    min-height: calc(100% - 1rem);
}

/* Navigation styles */
.navbar {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    box-shadow: 0 2px 4px var(--shadow-md);
}

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

.navbar-dark .navbar-brand,
.navbar-dark .nav-link {
    color: var(--text-light);
}

.nav-tabs {
    border-bottom: 2px solid var(--border-color);
}

.nav-tabs .nav-link {
    margin-bottom: -2px;
    border: none;
    color: var(--gray-700);
    font-size: 1.25rem;
    padding: 0.75rem 1rem;
    transition: all 0.15s ease-in-out;
}

.nav-tabs .nav-link:hover {
    border: none;
    color: var(--primary-color);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background-color: transparent;
    border: none;
    border-bottom: 2px solid var(--primary-color);
    font-weight: 500;
}

/* Alert styles */
.alert {
    position: relative;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.5rem;
}

.alert-info {
    color: var(--info-color);
    background-color: var(--info-light);
    border-color: var(--info-color);
}

.alert-success {
    color: var(--success-color);
    background-color: var(--success-light);
    border-color: var(--success-color);
}

.alert-warning {
    color: var(--warning-color);
    background-color: var(--warning-light);
    border-color: var(--warning-color);
}

.alert-danger {
    color: var(--danger-color);
    background-color: var(--danger-light);
    border-color: var(--danger-color);
}

/* Login page specific styles */
.login-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--bg-primary);
    border-radius: 0.5rem;
    box-shadow: 0 0.5rem 1rem var(--shadow-lg);
}

.login-container .form-control {
    margin-bottom: 1rem;
}

.login-container .btn {
    width: 100%;
    margin-top: 1rem;
}

/* QR code styles */
.qr-code-container {
    text-align: center;
    padding: 1rem;
}

.qr-code-container img {
    max-width: 250px;
    height: auto;
    margin-bottom: 1rem;
}

/* Balance display styles */
.balance-display {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 1rem 0;
}

/* Button group styles */
.btn-group {
    display: inline-flex;
    position: relative;
    gap: 0.5rem;
}

/* Text utilities */
.text-muted {
    color: var(--text-muted) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

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

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

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

.text-info {
    color: var(--info-color) !important;
}

/* Background utilities */
.bg-light {
    background-color: var(--bg-secondary) !important;
}

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

/* Border utilities */
.border {
    border: 1px solid var(--border-color) !important;
}

.border-top {
    border-top: 1px solid var(--border-color) !important;
}

.border-bottom {
    border-bottom: 1px solid var(--border-color) !important;
}

/* Responsive styles */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
    .btn {
        font-size: 1rem;
        padding: 0.5rem 1rem;
    }
    .form-control {
        font-size: 1rem;
        padding: 0.5rem;
    }
    .card-title {
        font-size: 1.25rem;
    }
    .display-4 {
        font-size: 2.5rem;
    }
    .table {
        font-size: 1rem;
    }
    .modal-title {
        font-size: 1.25rem;
    }
    .navbar-brand {
        font-size: 1.25rem;
    }
    .nav-link {
        font-size: 1rem;
    }
}