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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #64748b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 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);
    --drawer-width: 280px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Drawer Styles */
.drawer {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: var(--drawer-width);
    background-color: var(--surface);
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.drawer.open {
    transform: translateX(0);
}

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

.drawer-header h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.drawer-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
}

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

.drawer-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color 0.2s;
    gap: 0.75rem;
}

.nav-item:hover {
    background-color: var(--background);
}

.drawer-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.logout-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    pointer-events: auto;
}

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

.nav-icon {
    font-size: 1.25rem;
}

.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 999;
}

.drawer-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    transition: margin-left 0.3s ease;
}

.app-header {
    background-color: var(--surface);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
}

.menu-button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 0.25rem;
    transition: background-color 0.2s;
}

.menu-button:hover {
    background-color: var(--background);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.app-main {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Screen Styles */
.screen-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.screen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.screen-header h2 {
    font-size: 2rem;
    font-weight: 600;
}

.screen-card {
    background-color: var(--surface);
    border-radius: 0.5rem;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.screen-card h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    margin: 0 0 1.5rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Code Display Styles */
.code-display {
    background-color: var(--background);
    border: 2px solid var(--primary-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
    margin-top: 0.5rem;
}

.code-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.code-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 0.5rem;
    font-family: 'Courier New', monospace;
    margin: 1rem 0;
    padding: 0.75rem;
    background-color: var(--surface);
    border-radius: 0.375rem;
}

.code-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    font-style: italic;
}

.field-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-style: italic;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-input,
.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

/* Button Styles */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

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

.btn-secondary:hover {
    background-color: #475569;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Alert Styles */
.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1.5rem;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

/* Link Styles */
.link-container {
    margin-top: 1.5rem;
    text-align: center;
}

.link {
    color: var(--primary-color);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

/* Table Styles */
.table-container {
    background-color: var(--surface);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background-color: var(--background);
}

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

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

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

/* Status Badge */
.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.status-completed {
    background-color: #d1fae5;
    color: #065f46;
}

.status-pending {
    background-color: #fef3c7;
    color: #92400e;
}

.status-failed {
    background-color: #fee2e2;
    color: #991b1b;
}

/* Filter Group */
.filter-group {
    display: flex;
    gap: 1rem;
}

/* Loading and Empty States */
.loading,
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 1.125rem;
}

/* Responsive Design */
@media (min-width: 768px) {
    .drawer {
        position: relative;
        transform: translateX(0);
    }

    .drawer-overlay {
        display: none;
    }

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

    .menu-button {
        display: none;
    }
}

@media (max-width: 767px) {
    .screen-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .button-group {
        flex-direction: column;
    }

    .data-table {
        font-size: 0.875rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
    }
}