:root {
    --primary-blue: #3b82f6;
    --secondary-gray: #6b7280;
    --dark-bg: #141519;
    --text-white: #ffffff;
    --text-muted: #9ca3af;
    --success-green: #10b981;
    --warning-yellow: #f59e0b;
    --danger-red: #ef4444;
    --purple: #8b5cf6;
    --border-color: #374151;
    --card-bg: #1f2937;
}

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

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

/* Navigation */
.navbar {
    background-color: rgba(20, 21, 25, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white) !important;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-blue), var(--purple));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.nav-link {
    color: var(--text-white) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-blue) !important;
}

.btn-primary {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #2563eb;
    border-color: #2563eb;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--secondary-gray);
    border-color: var(--secondary-gray);
    color: var(--text-white);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: #4b5563;
    border-color: #4b5563;
    color: var(--text-white);
    transform: translateY(-1px);
}

.btn-outline-light {
    border-color: var(--border-color);
    color: var(--text-white);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-outline-light:hover {
    background-color: var(--text-white);
    color: var(--dark-bg);
}

/* Beta Banner */
.beta-banner {
    background: linear-gradient(90deg, var(--primary-blue), var(--purple));
    padding: 0.75rem 0;
    text-align: center;
    margin-top: 76px;
}

.beta-banner h6 {
    color: var(--text-white);
    font-weight: 600;
    margin: 0;
}

.beta-banner a {
    color: var(--text-white);
    text-decoration: none;
}

.beta-banner a:hover {
    text-decoration: underline;
}

/* Hero Section */
.hero-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #1a1b23 100%);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-white), var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.introduction-section {
    background: rgba(31, 41, 55, 0.5);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.introduction-section h4 {
    color: var(--primary-blue);
    font-weight: 600;
}

.introduction-section .lead {
    font-size: 1.1rem;
    color: var(--text-white);
    margin-bottom: 1rem;
}

.introduction-section p {
    color: var(--text-muted);
    line-height: 1.7;
}

.hero-buttons {
    margin: 2rem 0;
}

.hero-buttons .btn {
    font-size: 1.1rem;
    padding: 1rem 2rem;
    margin-right: 1rem;
    margin-bottom: 1rem;
}

.works-with h6 {
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.works-with i {
    transition: transform 0.3s ease;
}

.works-with i:hover {
    transform: scale(1.1);
}

.hero-image img {
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Sections */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.features-overview {
    background: var(--dark-bg);
}

/* Feature Sections */
.feature-section {
    padding: 5rem 0;
}

.feature-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.feature-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    font-weight: 500;
}

.feature-list i {
    font-size: 1.2rem;
    width: 24px;
}

.bg-dark-subtle {
    background-color: #1a1b23 !important;
}

/* Mockup Styles */
.analytics-mockup,
.feedback-mockup,
.exercise-mockup {
    padding: 2rem;
}

.analytics-mockup .card,
.feedback-mockup .card,
.exercise-mockup .card {
    background-color: var(--card-bg) !important;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.progress-circle {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

.circle-progress {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: conic-gradient(var(--primary-blue) 0deg 259deg, var(--border-color) 259deg 360deg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.circle-progress::before {
    content: '';
    width: 80px;
    height: 80px;
    background-color: var(--card-bg);
    border-radius: 50%;
    position: absolute;
}

.percentage {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
    z-index: 1;
}

.metric {
    margin-bottom: 1rem;
}

.metric .label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.progress {
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
}

.progress-bar {
    border-radius: 4px;
}

.feedback-item {
    background-color: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--primary-blue);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.suggestions ul li {
    margin-bottom: 0.5rem;
}

.campaign-stats .stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.campaign-stats .stat-item:last-child {
    border-bottom: none;
}

.stat-item .label {
    color: var(--text-muted);
}

.stat-item .value {
    font-weight: 600;
}

.recommendation {
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning-yellow);
    padding: 1rem;
    border-radius: 8px;
}

/* Pricing */
.pricing-preview {
    background-color: #1a1b23;
}

.pricing-card {
    transition: transform 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
}

.pricing-card.featured {
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.08);
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-white);
    margin: 1rem 0;
}

.period {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* FAQ */
.faq-section {
    background-color: var(--dark-bg);
}

.accordion-item {
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
}

.accordion-button {
    background-color: var(--card-bg) !important;
    color: var(--text-white) !important;
    border: none;
    font-weight: 600;
}

.accordion-button:not(.collapsed) {
    background-color: var(--primary-blue) !important;
    color: var(--text-white) !important;
}

.accordion-button:focus {
    box-shadow: none;
    border: none;
}

.accordion-body {
    background-color: var(--card-bg);
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

/* Final CTA */
.final-cta {
    background: linear-gradient(135deg, var(--primary-blue), var(--purple));
}

.cta-buttons .btn {
    font-size: 1.1rem;
    padding: 1rem 2rem;
    margin: 0.5rem;
}

/* Footer */
.footer {
    background-color: #0f1015;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-right: 2rem;
    transition: color 0.3s ease;
}

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

.contact-info {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.contact-info a {
    color: var(--primary-blue);
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .feature-title {
        font-size: 1.5rem;
    }
    
    .hero-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
        margin-right: 0;
    }
    
    .introduction-section {
        padding: 1.5rem;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 4rem 0;
    }
    
    .feature-section {
        padding: 3rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .price {
        font-size: 2.5rem;
    }
}

/* Utility Classes */
.text-purple {
    color: var(--purple) !important;
}

.bg-primary {
    background-color: var(--primary-blue) !important;
}

.text-success {
    color: var(--success-green) !important;
}

.text-warning {
    color: var(--warning-yellow) !important;
}

.text-danger {
    color: var(--danger-red) !important;
}

/* Animation Classes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Form Styles */
.form-control {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-white);
    border-radius: 8px;
    padding: 0.75rem 1rem;
}

.form-control:focus {
    background-color: var(--card-bg);
    border-color: var(--primary-blue);
    color: var(--text-white);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-gray);
}