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

:root {
    --meta-blue: #1877F2;
    --meta-blue-dark: #0C63D4;
    --meta-green: #42B72A;
    --meta-gray: #E4E6EB;
    --meta-dark: #1C1E21;
    --meta-text: #050505;
    --meta-text-secondary: #65676B;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: #F0F2F5;
    color: var(--meta-text);
    line-height: 1.6;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
}

/* Header */
.header {
    background: white;
    border-bottom: 1px solid var(--meta-gray);
    padding: 16px 32px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--meta-text);
}

.header-actions {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-success {
    padding: 10px 24px;
    border-radius: var(--border-radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--meta-blue-dark);
}

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

.btn-secondary {
    background: var(--meta-gray);
    color: var(--meta-text);
}

.btn-secondary:hover {
    background: #D8DADF;
}

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

.btn-success:hover {
    background: #36A420;
}

/* Progress Bar */
.progress-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 32px;
    background: #FAFAFA;
    border-bottom: 1px solid var(--meta-gray);
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.4;
    transition: opacity 0.3s;
}

.progress-step.active {
    opacity: 1;
}

.progress-step.completed {
    opacity: 1;
}

.step-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--meta-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    transition: all 0.3s;
}

.progress-step.active .step-circle {
    background: var(--meta-blue);
    color: white;
}

.progress-step.completed .step-circle {
    background: var(--meta-green);
    color: white;
}

.progress-step.completed .step-circle::before {
    content: '✓';
}

.progress-line {
    width: 80px;
    height: 2px;
    background: var(--meta-gray);
    margin: 0 16px;
}

/* Main Content */
.main-content {
    padding: 40px 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.step-content {
    display: none;
}

.step-content.active {
    display: block;
    animation: fadeIn 0.3s;
}

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

h2 {
    font-size: 28px;
    margin-bottom: 32px;
    color: var(--meta-text);
}

/* Form Sections */
.form-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--meta-text);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--meta-gray);
    border-radius: var(--border-radius);
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--meta-blue);
}

textarea {
    resize: vertical;
}

.char-count {
    float: right;
    font-size: 13px;
    color: var(--meta-text-secondary);
    margin-top: 4px;
}

/* Objective Cards */
.objective-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.objective-card {
    border: 2px solid var(--meta-gray);
    border-radius: var(--border-radius);
    padding: 24px;
    cursor: pointer;
    transition: all 0.2s;
}

.objective-card:hover {
    border-color: var(--meta-blue);
    box-shadow: var(--shadow);
}

.objective-card.selected {
    border-color: var(--meta-blue);
    background: #F0F8FF;
}

.objective-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.objective-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.objective-card p {
    color: var(--meta-text-secondary);
    font-size: 14px;
    margin-bottom: 12px;
}

.objective-card ul {
    list-style: none;
    padding: 0;
}

.objective-card ul li {
    padding: 4px 0;
    font-size: 13px;
    color: var(--meta-text-secondary);
}

.objective-card ul li::before {
    content: '✓ ';
    color: var(--meta-green);
}

/* Budget */
.budget-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.budget-option {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.date-range {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Audience Tabs */
.audience-tabs, .creative-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--meta-gray);
}

.tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--meta-text-secondary);
    transition: all 0.2s;
}

.tab-btn.active {
    color: var(--meta-blue);
    border-bottom-color: var(--meta-blue);
}

.tab-content {
    display: none;
}

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

/* Saved Audiences */
.saved-audiences {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.audience-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border: 2px solid var(--meta-gray);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.audience-item:hover {
    border-color: var(--meta-blue);
    box-shadow: var(--shadow);
}

.audience-item input[type="checkbox"] {
    margin-top: 4px;
}

.audience-info h4 {
    font-size: 16px;
    margin-bottom: 4px;
}

.audience-info p {
    font-size: 14px;
    color: var(--meta-text-secondary);
    margin-bottom: 8px;
}

.tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--meta-gray);
    border-radius: 16px;
    font-size: 12px;
    color: var(--meta-text-secondary);
}

/* Location & Interest Chips */
.location-chips, .interest-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--meta-blue);
    color: white;
    border-radius: 16px;
    font-size: 14px;
}

.chip button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
}

/* Age Range */
.age-range {
    display: flex;
    align-items: center;
    gap: 12px;
}

.age-range input {
    width: 80px;
}

/* Suggestions */
.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.suggestion-item {
    padding: 8px 16px;
    background: white;
    border: 1px solid var(--meta-gray);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.suggestion-item:hover {
    background: var(--meta-gray);
    border-color: var(--meta-blue);
}

/* Audience Estimate */
.audience-estimate {
    margin-top: 24px;
    padding: 20px;
    background: #F7F9FA;
    border-radius: var(--border-radius);
}

.audience-estimate h4 {
    margin-bottom: 12px;
}

.estimate-bar {
    height: 8px;
    background: var(--meta-gray);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.estimate-fill {
    height: 100%;
    background: var(--meta-blue);
    transition: width 0.3s;
}

.audience-estimate p {
    font-size: 18px;
    font-weight: 600;
    color: var(--meta-blue);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--meta-gray);
    border-radius: var(--border-radius);
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.upload-area:hover {
    border-color: var(--meta-blue);
    background: #F0F8FF;
}

.upload-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.upload-area h3 {
    margin-bottom: 8px;
}

.upload-area p {
    color: var(--meta-text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

/* Media Library */
.media-library, .uploaded-creatives {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.media-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 1;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.media-item:hover {
    transform: scale(1.05);
}

.media-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.media-checkbox {
    position: absolute;
    top: 8px;
    right: 8px;
}

.media-checkbox input[type="checkbox"] {
    width: 24px;
    height: 24px;
    cursor: pointer;
}

/* AI Generate */
.ai-generate {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.ai-generate h3 {
    font-size: 24px;
    margin-bottom: 24px;
}

/* Ad Copy Section */
.ad-copy-section {
    margin-top: 32px;
    padding: 24px;
    background: #F7F9FA;
    border-radius: var(--border-radius);
}

.ad-copy-section h3 {
    margin-bottom: 20px;
}

/* Placement Section */
.placement-section {
    margin-top: 32px;
    padding: 24px;
    background: white;
    border: 1px solid var(--meta-gray);
    border-radius: var(--border-radius);
}

.placement-section h3 {
    margin-bottom: 16px;
}

.placement-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.placement-options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

/* Button Group */
.button-group {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 32px;
}

/* Preview Container */
.preview-container {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 32px;
}

.preview-sidebar {
    background: #F7F9FA;
    padding: 24px;
    border-radius: var(--border-radius);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.preview-sidebar h3 {
    margin-bottom: 20px;
    font-size: 18px;
}

.summary-item {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--meta-gray);
}

.summary-item label {
    display: block;
    font-size: 13px;
    color: var(--meta-text-secondary);
    margin-bottom: 4px;
}

.summary-item span {
    font-size: 15px;
    font-weight: 600;
}

.estimated-results {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 2px solid var(--meta-gray);
}

.estimated-results h4 {
    margin-bottom: 16px;
    font-size: 16px;
}

.result-metric {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 14px;
}

/* Device Selector */
.device-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    justify-content: center;
}

.device-btn {
    padding: 10px 20px;
    background: white;
    border: 2px solid var(--meta-gray);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 15px;
    transition: all 0.2s;
}

.device-btn.active {
    background: var(--meta-blue);
    color: white;
    border-color: var(--meta-blue);
}

/* Placement Previews */
.placement-previews {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.preview-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.preview-card h4 {
    margin-bottom: 16px;
    font-size: 16px;
    font-weight: 600;
}

/* Device Mockups */
.device-mockup {
    background: #F0F2F5;
    border-radius: 20px;
    padding: 16px;
    max-width: 375px;
    margin: 0 auto;
}

.device-mockup.story {
    background: black;
    border-radius: 30px;
    padding: 20px 10px;
}

/* Facebook Post */
.fb-post, .ig-post {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.post-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
}

.profile-pic {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--meta-blue);
}

.post-info h5 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 2px;
}

.post-info span {
    font-size: 13px;
    color: var(--meta-text-secondary);
}

.post-text {
    padding: 0 12px 12px;
    font-size: 15px;
}

.post-image {
    width: 100%;
    background: var(--meta-gray);
}

.post-image img {
    width: 100%;
    display: block;
}

.post-footer {
    padding: 12px;
    border-top: 1px solid var(--meta-gray);
}

.post-cta h6 {
    font-size: 14px;
    margin-bottom: 4px;
}

.post-cta p {
    font-size: 13px;
    color: var(--meta-text-secondary);
    margin-bottom: 8px;
}

.cta-button {
    width: 100%;
    padding: 10px;
    background: var(--meta-blue);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.cta-button:hover {
    background: var(--meta-blue-dark);
}

.post-actions {
    display: flex;
    justify-content: space-around;
    padding: 8px 12px;
    border-top: 1px solid var(--meta-gray);
    font-size: 15px;
    color: var(--meta-text-secondary);
}

.post-actions span {
    cursor: pointer;
}

/* Instagram Post */
.ig-post .post-actions {
    border-top: none;
    justify-content: flex-start;
    gap: 16px;
    font-size: 24px;
}

.ig-post .post-text {
    font-size: 14px;
}

/* Story */
.story-container {
    position: relative;
    aspect-ratio: 9/16;
    border-radius: 20px;
    overflow: hidden;
}

.story-header {
    position: absolute;
    top: 16px;
    left: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-size: 14px;
    z-index: 10;
}

.story-header .profile-pic {
    width: 32px;
    height: 32px;
    border: 2px solid white;
}

.sponsored-label {
    margin-left: auto;
    font-size: 12px;
    opacity: 0.8;
}

.story-content {
    width: 100%;
    height: 100%;
}

.story-content img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.story-footer {
    position: absolute;
    bottom: 20px;
    left: 16px;
    right: 16px;
}

.story-footer .cta-button {
    background: rgba(255, 255, 255, 0.9);
    color: var(--meta-text);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    max-width: 500px;
    text-align: center;
    animation: slideUp 0.3s;
}

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

.success-icon {
    width: 80px;
    height: 80px;
    background: var(--meta-green);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    margin: 0 auto 24px;
}

.modal-content h2 {
    margin-bottom: 16px;
}

.campaign-id {
    margin: 24px 0;
    padding: 12px;
    background: var(--meta-gray);
    border-radius: var(--border-radius);
    font-family: monospace;
}

/* Responsive */
@media (max-width: 768px) {
    .preview-container {
        grid-template-columns: 1fr;
    }

    .progress-bar {
        overflow-x: auto;
    }

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

    .budget-container,
    .date-range {
        grid-template-columns: 1fr;
    }

    .placement-previews {
        grid-template-columns: 1fr;
    }
}