/**
 * AdVault - Modern SaaS & Direct-Response Design System
 * Palette: Deep Navy (#0B0F19), Clean White (#FFFFFF), Indigo (#4F46E5), Emerald (#10B981)
 */

:root {
    --adv-bg: #F8FAFC;
    --adv-surface: #FFFFFF;
    --adv-dark: #0B0F19;
    --adv-navy: #1E293B;
    --adv-primary: #4F46E5;
    --adv-primary-hover: #4338CA;
    --adv-accent: #6366F1;
    --adv-success: #10B981;
    --adv-success-hover: #059669;
    --adv-text: #0F172A;
    --adv-muted: #64748B;
    --adv-border: #E2E8F0;
    --adv-border-subtle: #F1F5F9;
    --adv-radius-sm: 8px;
    --adv-radius-md: 12px;
    --adv-radius-lg: 18px;
    --adv-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.08), 0 4px 12px -2px rgba(15, 23, 42, 0.03);
    --adv-shadow-lg: 0 20px 40px -10px rgba(79, 70, 229, 0.12), 0 8px 16px -4px rgba(15, 23, 42, 0.05);
}

/* Reset & Container */
.fb-app-wrap, .fb-content-section {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Inter", sans-serif;
    color: var(--adv-text);
    line-height: 1.6;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

/* Navigation Bar */
.fb-nav-bar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--adv-border);
    position: sticky;
    top: 0;
    z-index: 100;
    margin: 0 -20px 30px -20px;
    padding: 14px 24px;
}

.fb-nav-container {
    max-width: 1160px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.fb-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--adv-dark);
}

.fb-brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--adv-primary) 0%, var(--adv-accent) 100%);
    color: #fff;
    border-radius: var(--adv-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.25);
}

.fb-brand-icon.sm {
    width: 28px;
    height: 28px;
}

.fb-brand-name {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--adv-dark);
}

.fb-brand-tag {
    font-size: 11px;
    color: var(--adv-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: block;
    margin-top: -2px;
}

.fb-nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.fb-nav-link {
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--adv-muted);
    transition: color 0.2s;
}

.fb-nav-link:hover, .fb-nav-link.active {
    color: var(--adv-primary);
}

.fb-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    color: #065f46;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
}

.fb-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
}

.fb-dot.pulse {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: fbPulse 2s infinite;
}

@keyframes fbPulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Hero Section */
.fb-hero-section {
    text-align: center;
    padding: 20px 0 35px 0;
}

.fb-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #EEF2FF;
    border: 1px solid #E0E7FF;
    color: var(--adv-primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 16px;
}

.fb-badge-dot {
    width: 6px;
    height: 6px;
    background: var(--adv-primary);
    border-radius: 50%;
}

.fb-hero-title {
    font-size: 44px;
    font-weight: 900;
    letter-spacing: -1.2px;
    color: var(--adv-dark);
    margin: 0 0 16px 0;
    line-height: 1.15;
}

.fb-hero-sub {
    font-size: 18px;
    color: var(--adv-muted);
    max-width: 680px;
    margin: 0 auto 35px auto;
    line-height: 1.5;
}

/* Search Box Card */
.fb-search-box {
    background: var(--adv-surface);
    border: 2px solid var(--adv-border);
    border-radius: var(--adv-radius-lg);
    box-shadow: var(--adv-shadow-lg);
    padding: 16px;
    max-width: 820px;
    margin: 0 auto;
    transition: border-color 0.2s;
}

.fb-search-box:focus-within {
    border-color: var(--adv-primary);
}

.fb-search-form {
    display: flex;
    gap: 10px;
}

.fb-input-wrapper {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
}

.fb-input-prefix {
    position: absolute;
    left: 16px;
    color: var(--adv-muted);
    pointer-events: none;
    display: flex;
}

.fb-url-input {
    width: 100%;
    padding: 16px 90px 16px 46px;
    font-size: 15px;
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-md);
    background: #F8FAFC;
    color: var(--adv-dark);
    transition: all 0.2s;
    box-sizing: border-box;
}

.fb-url-input:focus {
    outline: none;
    background: #FFFFFF;
    border-color: var(--adv-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.fb-paste-btn {
    position: absolute;
    right: 10px;
    background: #E2E8F0;
    color: var(--adv-dark);
    border: none;
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.15s;
}

.fb-paste-btn:hover {
    background: #CBD5E1;
}

.fb-submit-btn {
    background: linear-gradient(135deg, var(--adv-primary) 0%, var(--adv-primary-hover) 100%);
    color: #fff;
    border: none;
    border-radius: var(--adv-radius-md);
    padding: 0 30px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.fb-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.fb-search-footer {
    margin-top: 10px;
    padding-top: 8px;
    font-size: 12px;
    color: var(--adv-muted);
}

.fb-hint-text {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Ad Placements (Clean, Native & Non-Obtrusive) */
.fb-ad-wrapper {
    margin: 25px 0;
    text-align: center;
}

.fb-native-ad-banner {
    background: linear-gradient(135deg, #F8FAFC 0%, #EEF2FF 100%);
    border: 1px dashed #CBD5E1;
    border-radius: var(--adv-radius-md);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    gap: 15px;
}

.fb-native-ad-banner.highlight {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    border-color: #A5B4FC;
}

.fb-ad-tag {
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--adv-muted);
    background: #E2E8F0;
    padding: 3px 6px;
    border-radius: 4px;
}

.fb-native-ad-inner {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.fb-native-ad-title {
    font-size: 14px;
    color: var(--adv-dark);
}

.fb-native-ad-desc {
    font-size: 13px;
    color: var(--adv-muted);
}

.fb-native-ad-cta {
    background: var(--adv-primary);
    color: #fff;
    text-decoration: none;
    font-size: 12px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 6px;
    margin-left: auto;
    transition: background 0.15s;
}

.fb-native-ad-cta:hover {
    background: var(--adv-primary-hover);
}

/* Alerts */
.fb-alert-banner {
    background: #FEF2F2;
    border: 1px solid #FECACA;
    color: #991B1B;
    padding: 14px 18px;
    border-radius: var(--adv-radius-sm);
    margin: 20px 0;
    font-size: 14px;
    font-weight: 600;
}

.fb-alert-banner.info {
    background: #EFF6FF;
    border-color: #BFDBFE;
    color: #1E40AF;
}

/* Result Dashboard */
.fb-result-dashboard {
    background: var(--adv-surface);
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-lg);
    box-shadow: var(--adv-shadow);
    overflow: hidden;
    margin-bottom: 40px;
}

.fb-result-header {
    background: #F8FAFC;
    border-bottom: 1px solid var(--adv-border);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.fb-advertiser-profile {
    display: flex;
    align-items: center;
    gap: 14px;
}

.fb-avatar-img {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.fb-avatar-fallback {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: #E2E8F0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fb-advertiser-title-line {
    display: flex;
    align-items: center;
    gap: 8px;
}

.fb-advertiser-name {
    font-size: 18px;
    font-weight: 800;
    color: var(--adv-dark);
    margin: 0;
}

.fb-active-badge {
    background: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
    font-size: 10px;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.fb-advertiser-sub-line {
    font-size: 13px;
    color: var(--adv-muted);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
}

.fb-external-link {
    color: var(--adv-primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

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

.fb-platforms-bar {
    display: flex;
    gap: 6px;
}

.fb-platform-pill {
    background: #E2E8F0;
    color: var(--adv-dark);
    font-size: 11px;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 4px;
}

/* Two-Column Grid */
.fb-result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding: 24px;
}

.fb-media-stage {
    background: #000;
    border-radius: var(--adv-radius-md);
    overflow: hidden;
    min-height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fb-media-stage video {
    width: 100%;
    max-height: 480px;
    display: block;
}

.fb-media-stage img {
    width: 100%;
    max-height: 480px;
    object-fit: contain;
    display: block;
}

.fb-media-stage iframe {
    width: 100%;
    min-height: 440px;
    border: none;
}

.fb-media-controls {
    display: flex;
    gap: 12px;
    margin-top: 14px;
}

.fb-btn {
    flex: 1;
    padding: 14px 18px;
    border-radius: var(--adv-radius-sm);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    transition: all 0.15s;
}

.fb-btn-primary-download {
    background: var(--adv-success);
    color: #fff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
}

.fb-btn-primary-download:hover {
    background: var(--adv-success-hover);
    transform: translateY(-1px);
}

.fb-btn-secondary-swipe {
    background: #F1F5F9;
    color: var(--adv-dark);
    border: 1px solid var(--adv-border);
}

.fb-btn-secondary-swipe:hover {
    background: #E2E8F0;
}

/* Copy Panel */
.fb-copy-card {
    background: #F8FAFC;
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-md);
    padding: 16px;
    margin-bottom: 14px;
}

.fb-copy-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.fb-card-title {
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--adv-muted);
}

.fb-copy-btn {
    background: #FFFFFF;
    border: 1px solid var(--adv-border);
    color: var(--adv-dark);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
}

.fb-copy-btn:hover {
    background: #F1F5F9;
    border-color: #CBD5E1;
}

.fb-copy-text {
    font-size: 14px;
    color: var(--adv-dark);
    white-space: pre-line;
    max-height: 180px;
    overflow-y: auto;
    line-height: 1.5;
}

.fb-headline-text {
    font-size: 15px;
    font-weight: 700;
    color: var(--adv-dark);
}

.fb-cta-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.fb-cta-pill {
    background: #1877F2;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 6px;
}

.fb-landing-url {
    font-size: 13px;
    color: var(--adv-primary);
    text-decoration: none;
    word-break: break-all;
}

.fb-landing-url:hover {
    text-decoration: underline;
}

.fb-fallback-notice {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: #EFF6FF;
    border: 1px solid #BFDBFE;
    border-radius: var(--adv-radius-sm);
    padding: 14px;
    font-size: 13px;
    color: #1E40AF;
}

/* Swipe Board */
.fb-swipe-board {
    background: #FFFFFF;
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-lg);
    padding: 24px;
    margin-bottom: 40px;
}

.fb-swipe-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

.fb-swipe-head h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 800;
}

.fb-swipe-head p {
    margin: 2px 0 0 0;
    font-size: 13px;
    color: var(--adv-muted);
}

.fb-clear-btn {
    background: none;
    border: none;
    color: #EF4444;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
}

.fb-swipe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.fb-swipe-card {
    background: #F8FAFC;
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-sm);
    overflow: hidden;
}

.fb-swipe-card img {
    width: 100%;
    height: 120px;
    object-fit: cover;
}

.fb-swipe-card-body {
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.fb-swipe-card-title {
    font-size: 13px;
    font-weight: 700;
    margin: 0;
}

/* Steps, Features, FAQ Sections */
.fb-section-header {
    text-align: center;
    margin-bottom: 35px;
}

.fb-sub-badge {
    font-size: 12px;
    font-weight: 800;
    color: var(--adv-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.fb-section-header h2 {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin: 8px 0;
    color: var(--adv-dark);
}

.fb-section-header p {
    font-size: 16px;
    color: var(--adv-muted);
    margin: 0;
}

.fb-steps-container, .fb-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 50px;
}

.fb-step-card, .fb-feature-item {
    background: var(--adv-surface);
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-md);
    padding: 24px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.fb-step-card:hover, .fb-feature-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--adv-shadow);
}

.fb-step-number {
    font-size: 24px;
    font-weight: 900;
    color: var(--adv-primary);
    margin-bottom: 12px;
}

.fb-step-card h3, .fb-feature-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 10px 0;
    color: var(--adv-dark);
}

.fb-step-card p, .fb-feature-item p {
    font-size: 14px;
    color: var(--adv-muted);
    margin: 0;
    line-height: 1.5;
}

.fb-feature-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

/* FAQ Accordion */
.fb-faq-accordion {
    max-width: 820px;
    margin: 0 auto 60px auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.fb-faq-item {
    background: var(--adv-surface);
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-md);
    padding: 16px 20px;
}

.fb-faq-question {
    font-size: 16px;
    font-weight: 700;
    color: var(--adv-dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.fb-faq-arrow {
    font-weight: bold;
    color: var(--adv-muted);
}

.fb-faq-answer {
    margin-top: 12px;
    font-size: 14px;
    color: var(--adv-muted);
    line-height: 1.6;
}

/* Footer */
.fb-site-footer {
    border-top: 1px solid var(--adv-border);
    padding: 40px 0 30px 0;
    margin-top: 40px;
}

.fb-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

.fb-footer-brand p {
    font-size: 13px;
    color: var(--adv-muted);
    margin-top: 12px;
    max-width: 320px;
}

.fb-footer-col h5 {
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--adv-dark);
    margin: 0 0 12px 0;
}

.fb-footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.fb-footer-col li {
    margin-bottom: 8px;
}

.fb-footer-col a {
    color: var(--adv-muted);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.15s;
}

.fb-footer-col a:hover {
    color: var(--adv-primary);
}

.fb-footer-disclaimer {
    border-top: 1px solid var(--adv-border);
    padding-top: 20px;
    font-size: 12px;
    color: #94A3B8;
    line-height: 1.6;
}

.fb-copyright {
    margin-top: 8px;
    color: var(--adv-muted);
}

/* Loading & Skeletons */
.fb-art-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: fbSpin 0.7s linear infinite;
    display: inline-block;
}

@keyframes fbSpin {
    to { transform: rotate(360deg); }
}

.fb-skeleton-card {
    background: #fff;
    border: 1px solid var(--adv-border);
    border-radius: var(--adv-radius-lg);
    padding: 24px;
    margin-bottom: 30px;
}

.fb-skel-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #E2E8F0;
}

.fb-skel-line {
    height: 12px;
    background: #E2E8F0;
    border-radius: 4px;
    margin-bottom: 8px;
}

.fb-skel-line.w-40 { width: 40%; }
.fb-skel-line.w-60 { width: 60%; }
.fb-skel-line.w-80 { width: 80%; }
.fb-skel-line.w-90 { width: 90%; }
.fb-skel-line.w-100 { width: 100%; }

.fb-skel-media {
    background: #E2E8F0;
    border-radius: var(--adv-radius-md);
    min-height: 300px;
}

.fb-skeleton-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 16px;
}

/* Responsive */
@media (max-width: 860px) {
    .fb-hero-title { font-size: 32px; }
    .fb-search-form { flex-direction: column; }
    .fb-submit-btn { padding: 14px; }
    .fb-result-grid { grid-template-columns: 1fr; }
    .fb-steps-container, .fb-features-grid { grid-template-columns: 1fr; }
    .fb-footer-grid { grid-template-columns: 1fr; gap: 20px; }
    .fb-nav-links { display: none; }
}