/* ===== CSS RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #25D366;
    --primary-dark: #1da851;
    --secondary-color: #128C7E;
    --accent-color: #075E54;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-400: #9ca3af;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Animation */
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

.section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav {
    padding: var(--spacing-md) 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.logo {
    width: 28px;
    height: 28px;
    filter: brightness(0) saturate(100%) invert(15%) sepia(30%) saturate(5000%) hue-rotate(135deg) brightness(95%) contrast(95%);
}

.brand-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.nav-links {
    display: none;
    align-items: center;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-base);
}

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

.nav-toggle {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-base);
}

/* ===== HERO SECTION ===== */
.hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-3xl);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e5e7eb" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>') center/50px 50px;
    opacity: 0.3;
    z-index: 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

@media (min-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-5xl);
    }
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
    .hero-cta {
        flex-direction: row;
    }
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

@media (min-width: 640px) {
    .hero-features {
        flex-direction: row;
        gap: var(--spacing-lg);
    }
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.feature-item .icon {
    color: var(--primary-color);
    font-weight: 600;
}

.hero-image {
    position: relative;
    text-align: center;
}

.screenshot {
    width: 100%;
    max-width: 240px;
    height: 450px;
    object-fit: cover;
    object-position: top;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-slow);
}

.screenshot:hover {
    transform: scale(1.02);
}

.floating-card {
    position: absolute;
    bottom: 30px;
    right: 30px;
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    animation: float 3s ease-in-out infinite;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.progress-bar {
    width: 100%;
    height: 4px;
    background-color: var(--gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-fill {
    width: 75%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    animation: progress 2s ease-in-out infinite;
}

@keyframes progress {
    0% { width: 0%; }
    50% { width: 75%; }
    100% { width: 100%; }
}

.card-stats {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.features .container {
    max-width: 1400px;
}

@media (min-width: 1280px) {
    .features .container {
        padding: 0 var(--spacing-md);
    }
}

.section-header {
    margin-bottom: var(--spacing-3xl);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    justify-items: center;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
        max-width: 1200px;
        margin: 0 auto;
    }
}

@media (min-width: 1280px) {
    .features-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: var(--spacing-md);
        max-width: 1400px;
    }
}

.feature-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
    max-width: 280px;
    width: 100%;
}

@media (min-width: 1280px) {
    .feature-card {
        max-width: 250px;
    }
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

/* Exceção para o ícone do "uso ilimitado" (4º card) */
.feature-card:nth-child(4) .feature-icon svg {
    width: 40px;
    height: 40px;
}

@media (min-width: 1280px) {
    .feature-icon {
        width: 48px;
        height: 48px;
        margin: 0 auto var(--spacing-xs);
    }
    
    .feature-icon svg {
        width: 28px;
        height: 28px;
    }
    
    /* Exceção para o ícone do "uso ilimitado" em telas grandes */
    .feature-card:nth-child(4) .feature-icon svg {
        width: 36px;
        height: 36px;
    }
}

.feature-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

@media (min-width: 1280px) {
    .feature-title {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-xs);
    }
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: var(--font-size-sm);
}

@media (min-width: 1280px) {
    .feature-description {
        line-height: 1.4;
    }
}

/* ===== PRICING SECTION ===== */
.pricing {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

.toggle-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.badge {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-left: var(--spacing-xs);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 32px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--gray-200);
    border-radius: 32px;
    transition: var(--transition-base);
}

.slider:before {
    position: absolute;
    content: "";
    height: 24px;
    width: 24px;
    left: 4px;
    bottom: 4px;
    background-color: var(--white);
    border-radius: 50%;
    transition: var(--transition-base);
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(28px);
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    border: 2px solid var(--gray-200);
    position: relative;
    transition: all var(--transition-base);
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.plan-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.plan-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.plan-name {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.plan-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.currency {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-color);
}

.period {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.savings {
    background-color: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}

.plan-description {
    color: var(--text-secondary);
}

.plan-features {
    margin-bottom: var(--spacing-xl);
}

.plan-features .feature-item {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-100);
}

.plan-features .feature-item:last-child {
    border-bottom: none;
}

.pricing-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.testimonial-card {
    background: var(--gray-50);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.testimonial-content {
    font-style: italic;
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    color: var(--text-primary);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-role {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.testimonial-rating {
    font-size: var(--font-size-sm);
}

/* ===== FAQ SECTION ===== */
.faq {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: background-color var(--transition-base);
}

.faq-question:hover {
    background-color: var(--gray-50);
}

.faq-question h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.faq-toggle {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    color: var(--primary-color);
    transition: transform var(--transition-base);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== CTA SECTION ===== */
.cta {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.cta-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

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

.cta .btn-primary:hover {
    background-color: var(--gray-100);
    transform: translateY(-2px);
}

.cta-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.guarantee-icon {
    font-size: var(--font-size-base);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    width: 28px;
    height: 28px;
    filter: brightness(0) saturate(100%) invert(15%) sepia(30%) saturate(5000%) hue-rotate(135deg) brightness(95%) contrast(95%);
}

.footer-description {
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--gray-400) !important;
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-links a:link,
.footer-links a:visited,
.footer-links a:active {
    color: var(--gray-400) !important;
}

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

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--gray-800);
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
    }
}

.footer-copyright {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: var(--gray-400);
    transition: color var(--transition-base);
}

.social-link:hover {
    color: var(--primary-color);
}

/* ===== RESPONSIVE UTILITIES ===== */
@media (max-width: 767px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .btn-large {
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    .hero-cta {
        align-items: stretch;
    }
    
    .floating-card {
        right: 10px;
        bottom: 10px;
        min-width: 150px;
    }
}

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

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

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===== FOCUS STYLES ===== */
.btn:focus,
.nav-link:focus,
.faq-question:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== DEMO VIDEO SECTION ===== */
.demo-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
}

.demo-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2325D366' fill-opacity='0.02'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.demo-content {
    position: relative;
    z-index: 1;
}

.demo-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.demo-title {
    color: var(--primary-color);
    font-weight: 700;
}

.video-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    background: var(--white);
    transition: all var(--transition-base);
    aspect-ratio: 16/9;
}

.video-container:hover {
    transform: translateY(-8px);
    box-shadow: 0 35px 70px rgba(0, 0, 0, 0.2);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    height: 100%;
    cursor: pointer;
    overflow: hidden;
    background: var(--gray-100);
}

.thumbnail-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.video-thumbnail:hover .thumbnail-image {
    transform: scale(1.05);
}

.thumbnail-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(37, 211, 102, 0.1) 0%,
        rgba(18, 140, 126, 0.1) 50%,
        rgba(7, 94, 84, 0.2) 100%
    );
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.video-thumbnail:hover .thumbnail-overlay {
    background: linear-gradient(
        135deg,
        rgba(37, 211, 102, 0.15) 0%,
        rgba(18, 140, 126, 0.15) 50%,
        rgba(7, 94, 84, 0.25) 100%
    );
}

.play-button {
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-base);
    animation: pulse 2s infinite;
}

.video-thumbnail:hover .play-button {
    transform: scale(1.1);
    animation: none;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

.video-info {
    text-align: center;
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.video-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.video-info p {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

.duration {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    backdrop-filter: blur(10px);
}

#demo-video-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
}

/* Responsive Design */
@media (max-width: 768px) {
    .demo-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .video-info h3 {
        font-size: var(--font-size-lg);
    }
    
    .video-info p {
        font-size: var(--font-size-sm);
    }
    
    .play-button svg {
        width: 60px;
        height: 60px;
    }
}

@media (max-width: 480px) {
    .play-button svg {
        width: 50px;
        height: 50px;
    }
    
    .video-info h3 {
        font-size: var(--font-size-base);
    }
    
    .video-info p {
        font-size: var(--font-size-xs);
    }
}

/* ===== SELECTION STYLES ===== */
::selection {
    background-color: var(--primary-color);
    color: var(--white);
}