:root {
    --primary-color: #4CAF50;
    --danger-color: #f44336;
    --warning-color: #ffc107;
    --info-color: #2196F3;
    --light-bg: #f5f5f5;
    --dark-text: #333;
    --light-text: #666;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --border-radius: 8px;
    --sidebar-width: 250px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background: var(--light-bg);
    min-height: 100vh;
}

/* Mobile Navigation */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--dark-text);
    padding: 10px;
}

.navbar {
    background: var(--white);
    padding: 1rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-text);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: background 0.3s;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a:hover {
    background: var(--light-bg);
}

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

/* Main Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Login Page - Mobile Responsive */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.login-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    padding: 2rem;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--dark-text);
}

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

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

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s;
    text-decoration: none;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-block {
    width: 100%;
}

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

.btn-primary:hover {
    background: #45a049;
    transform: translateY(-1px);
}

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

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

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

.btn-secondary {
    background: #666;
    color: var(--white);
}

/* Steps Container - Mobile Responsive */
.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.step-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.step-header {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.step-header h3 {
    color: var(--dark-text);
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.step-header h4 {
    color: var(--light-text);
    font-size: 1rem;
    font-weight: normal;
}

.step-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem 0;
    text-align: center;
}

.qr-container {
    text-align: center;
    width: 100%;
}

.qr-image {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: 0.5rem;
    background: var(--white);
}

.status-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.status-icon.success {
    color: var(--primary-color);
}

.status-icon.error {
    color: var(--danger-color);
}

.status-icon.warning {
    color: var(--warning-color);
}

/* Forms - Mobile Responsive */
.form-container {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.form-row {
    display: flex;
    flex-direction: column;
}

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

/* Tables - Mobile Responsive */
.table-container {
    overflow-x: auto;
    margin-bottom: 1rem;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    -webkit-overflow-scrolling: touch;
}

.table-responsive {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.table-responsive th,
.table-responsive td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.table-responsive th {
    background: var(--light-bg);
    font-weight: 600;
    color: var(--dark-text);
    position: sticky;
    top: 0;
}

.table-responsive tr:hover {
    background: rgba(0, 0, 0, 0.02);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.alert-success {
    background: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

.alert-error {
    background: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

.alert-warning {
    background: #fff3e0;
    color: #ef6c00;
    border: 1px solid #ffcc80;
}

.alert-info {
    background: #e3f2fd;
    color: #1565c0;
    border: 1px solid #bbdefb;
}

/* Persona Editor */
.persona-editor {
    width: 100%;
    min-height: 300px;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
}

/* File Upload */
.file-upload {
    border: 2px dashed #ddd;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.3s;
    margin-bottom: 1rem;
}

.file-upload:hover {
    border-color: var(--primary-color);
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload-label {
    display: block;
    cursor: pointer;
    padding: 1rem;
}

/* Button Group */
.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-group .btn {
    flex: 1;
    min-width: 120px;
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 0.5rem 0;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.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-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.flex-wrap { flex-wrap: wrap; }
.w-100 { width: 100%; }

/* Mobile Menu */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow);
        z-index: 1000;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links a {
        width: 100%;
        text-align: left;
        padding: 1rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        width: 100%;
    }
    
    .table-responsive {
        font-size: 14px;
    }
    
    .table-responsive th,
    .table-responsive td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0.5rem;
    }
    
    .login-card {
        padding: 1.5rem;
    }
    
    .step-card {
        padding: 1rem;
    }
    
    .form-container {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-bg: #1a1a1a;
        --dark-text: #ffffff;
        --light-text: #cccccc;
        --white: #2d2d2d;
        --shadow: 0 2px 10px rgba(0,0,0,0.3);
    }
    
    .form-control {
        background: #333;
        border-color: #444;
        color: var(--dark-text);
    }
    
    .table-responsive th {
        background: #333;
    }
    
    .table-responsive tr:hover {
        background: rgba(255, 255, 255, 0.05);
    }
    
    .persona-editor {
        background: #333;
        color: var(--dark-text);
        border-color: #444;
    }
    
    .file-upload {
        border-color: #444;
        background: #333;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .mobile-menu-toggle {
        display: none !important;
    }
    
    .container {
        padding: 0;
        max-width: 100%;
    }
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo {
    height: 28px;
    width: 28px;
    object-fit: contain;
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 600;
    white-space: nowrap;
}