:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

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

/* Login Page Styles */
.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
}

.login-card {
    background: white;
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    max-width: 440px;
    width: 100%;
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.auth-step {
    animation: fadeIn 0.3s ease-in;
}

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

.verification-text {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.code-input-container {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 2rem 0;
}

.code-digit {
    width: 3rem;
    height: 3.5rem;
    font-size: 1.75rem;
    text-align: center;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.2s;
}

.code-digit:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.resend-section {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.resend-timer {
    display: block;
    margin-bottom: 0.5rem;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    text-decoration: underline;
    font-size: 0.875rem;
    padding: 0.25rem;
}

.btn-link:disabled {
    color: var(--text-secondary);
    cursor: not-allowed;
    text-decoration: none;
}

.back-link {
    color: var(--primary-color);
    cursor: pointer;
    margin-bottom: 1.5rem;
    display: inline-block;
    font-size: 0.9rem;
}

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

.divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--border-color);
}

.divider::before { left: 0; }
.divider::after { right: 0; }

.divider span {
    background: white;
    padding: 0 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.login-footer {
    text-align: center;
    margin-top: 2rem;
    color: white;
}

.login-footer p {
    margin: 0.5rem 0;
}

.footer-note {
    font-size: 0.875rem;
    opacity: 0.9;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    transition: all 0.2s;
    font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

/* Buttons */
.btn {
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-full {
    width: 100%;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
}

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

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #fcd34d;
}

/* Header */
.header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-email {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Navigation */
.nav-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    overflow-x: auto;
}

.nav-tab {
    padding: 0.875rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s;
    margin-bottom: -2px;
    white-space: nowrap;
}

.nav-tab:hover {
    color: var(--primary-color);
}

.nav-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.card-header {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* Questions */
.question-container {
    max-width: 900px;
    margin: 0 auto;
}

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

.question-text {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.question-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.option-button {
    padding: 1.5rem;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
}

.option-button:hover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.option-explanation {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-weight: 400;
}

.progress-bar {
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    margin-bottom: 2rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-light) 100%);
    transition: width 0.3s ease;
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

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

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-color);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tbody tr:hover {
    background-color: var(--bg-color);
}

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

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Badges */
.badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.badge-option {
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.badge-option:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.badge-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.badge-preview {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
    font-weight: 700;
    border-radius: 8px;
    font-size: 0.875rem;
}

.badge-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
}

/* Badge Classifications */
.badge-ai-free {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.badge-human-led {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.badge-co-created {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
}

.badge-ai-led {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.badge-ai-generated {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 16px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
    animation: slideUp 0.3s ease;
}

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

.modal-header {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.modal-footer {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Spinner */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

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

/* Utilities */
.hidden {
    display: none !important;
}

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

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

/* Account Type Selector */
.account-type-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.account-type-option {
    cursor: pointer;
}

.account-type-option input[type="radio"] {
    display: none;
}

.account-type-card {
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    transition: all 0.2s;
    height: 100%;
}

.account-type-option:hover .account-type-card {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.02);
}

.account-type-option input[type="radio"]:checked + .account-type-card {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.account-type-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.account-type-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.1rem;
}

/* Artifact ID Display */
.artifact-id-display {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    margin: 1rem 0;
    border: 2px dashed var(--primary-color);
    word-break: break-all;
}

/* Checkbox/Radio */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
}

.checkbox-group input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

/* Search */
.search-box {
    position: relative;
    margin-bottom: 1.5rem;
}

.search-input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.25rem;
}

/* Subsections */
.subsection-item {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary-color);
}

.subsection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

/* Downloads */
.download-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.download-item {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--bg-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.download-item:hover {
    background: var(--card-bg);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.download-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.download-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .login-card {
        padding: 2rem 1.5rem;
    }

    .code-digit {
        width: 2.5rem;
        height: 3rem;
        font-size: 1.5rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-tabs {
        overflow-x: scroll;
    }

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

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

    th, td {
        padding: 0.75rem 0.5rem;
    }
}