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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --danger-color: #dc2626;
    --warning-color: #d97706;
    --info-color: #0891b2;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition: all 0.2s ease-in-out;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.header-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.header-content h1 i {
    font-size: 2rem;
}

.header-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    font-weight: 400;
}

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

/* Single Page Layout */
.single-page-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    min-height: calc(100vh - 200px);
}

.input-column {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    height: fit-content;
}

.output-column {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    height: fit-content;
}

/* Section Headers */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-header h2 i {
    color: var(--primary-color);
}

.step-indicator {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: var(--border-color);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
}

.step-indicator.active {
    background-color: var(--primary-color);
    color: white;
}

/* API Configuration */
.api-config {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.api-config h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.api-config h3 i {
    color: var(--warning-color);
}

.api-input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: center;
}

.input-wrapper {
    position: relative;
    flex: 1;
}

.api-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
    padding-right: 3rem;
}

.api-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.toggle-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

.api-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.status-indicator {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: 50%;
    background-color: var(--danger-color);
    transition: var(--transition);
}

.status-indicator.valid {
    background-color: var(--success-color);
}

.status-indicator.loading {
    background-color: var(--warning-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.api-warning {
    background-color: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.api-warning i {
    color: var(--info-color);
}

/* Upload Section */
.upload-section {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.upload-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.upload-section h3 i {
    color: var(--info-color);
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem 1rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background-color: var(--bg-secondary);
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-tertiary);
}

.file-upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgb(37 99 235 / 0.05);
}

.upload-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.upload-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.upload-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-tertiary);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-top: 1rem;
}

.file-details {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.file-details i {
    color: var(--info-color);
    font-size: 1.25rem;
}

/* Job Description Section */
.job-description-section {
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.job-description-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.job-description-section h3 i {
    color: var(--success-color);
}

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

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

.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    background-color: var(--bg-primary);
    transition: var(--transition);
}

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

.form-textarea {
    width: 100%;
    min-height: 150px;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: var(--transition);
}

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

.char-count {
    text-align: right;
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Customize Section */
.customize-section {
    text-align: center;
    margin-bottom: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

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

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

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

.btn-secondary:hover:not(:disabled) {
    background-color: #475569;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-success:hover:not(:disabled) {
    background-color: #047857;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #b91c1c;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.form-select-sm {
    padding: 0.5rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
}

.requirements-check {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.requirement-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    transition: var(--transition);
}

.requirement-item.met {
    color: var(--success-color);
}

.requirement-item i {
    font-size: 1rem;
}

.requirement-item.met i {
    color: var(--success-color);
}

/* Editor Section */
.editor-section {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.editor-tabs {
    display: flex;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.tab-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: var(--bg-primary);
}

.tab-content {
    padding: 1.5rem;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.editor-toolbar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.download-actions-inline {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

.json-editor {
    min-height: 400px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.json-editor-compact {
    min-height: 300px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    font-size: 0.875rem;
}

.resume-preview {
    min-height: 400px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    background-color: var(--bg-secondary);
}

.resume-preview-compact {
    min-height: 300px;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    background-color: var(--bg-secondary);
    font-size: 0.875rem;
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
}

.preview-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Output Section */
.output-section {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.output-tabs {
    display: flex;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.output-container .tab-content {
    padding: 1.5rem;
}

.customized-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.customization-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.summary-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.summary-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.download-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.template-selection h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.template-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.template-option {
    cursor: pointer;
}

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

.template-card {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
    transition: var(--transition);
    background-color: var(--bg-secondary);
}

.template-option input[type="radio"]:checked + .template-card {
    border-color: var(--primary-color);
    background-color: rgb(37 99 235 / 0.05);
}

.template-preview {
    height: 80px;
    margin-bottom: 0.5rem;
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
}

.modern-preview {
    background: linear-gradient(45deg, #f0f9ff 25%, transparent 25%), 
                linear-gradient(-45deg, #0ea5e9 25%, transparent 25%);
    background-size: 20px 20px;
}

.ats-preview {
    background: repeating-linear-gradient(
        0deg,
        #f8fafc,
        #f8fafc 2px,
        #e2e8f0 2px,
        #e2e8f0 4px
    );
}

.executive-preview {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.pdf-preview-container {
    margin-bottom: 1.5rem;
}

.pdf-preview {
    min-height: 500px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
}

.pdf-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.close-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

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

.progress-container {
    margin-bottom: 2rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 1rem;
}

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

.progress-text {
    text-align: center;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.progress-steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.step-item.active {
    border-color: var(--primary-color);
    background-color: rgb(37 99 235 / 0.05);
}

.step-item.completed {
    border-color: var(--success-color);
    background-color: rgb(5 150 105 / 0.05);
}

.step-item i {
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: var(--transition);
}

.step-item.active i {
    color: var(--primary-color);
}

.step-item.completed i {
    color: var(--success-color);
}

.error-content {
    text-align: center;
    color: var(--danger-color);
}

.error-content i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Footer */
.app-footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Compact PDF Section */
.pdf-content-compact {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.template-selection-compact {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.template-selection-compact label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0;
}

.pdf-preview-container-compact {
    height: 300px;
}

.pdf-preview-compact {
    height: 100%;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    overflow: hidden;
}

.pdf-preview-compact iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.pdf-actions-compact {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .single-page-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .input-column,
    .output-column {
        margin-bottom: 1rem;
    }
}

@media (max-width: 768px) {
    .header-content h1 {
        font-size: 2rem;
    }
    
    .header-content p {
        font-size: 1rem;
    }
    
    .main-content {
        padding: 1rem 0.5rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .api-input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .requirements-check {
        flex-direction: column;
        gap: 1rem;
    }
    
    .customization-summary {
        grid-template-columns: 1fr;
    }
    
    .download-actions {
        flex-direction: column;
    }
    
    .template-options {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .header-content h1 {
        font-size: 1.75rem;
    }
    
    .app-header {
        padding: 1.5rem 0;
    }
    
    .main-content {
        padding: 1rem 0.25rem;
    }
    
    .api-config,
    .upload-section,
    .job-description-section {
        padding: 0.75rem;
    }
    
    .input-column,
    .output-column {
        padding: 1rem;
    }
    
    .file-upload-area {
        padding: 2rem 1rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
}