:root {
    --bg-color: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.5);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-color: #6366f1;
    --primary-light: #818cf8;
    --gradient-hero: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --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-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 2rem;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundShift 20s ease infinite;
}

@keyframes backgroundShift {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

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

.app-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    animation: titleFloat 3s ease-in-out infinite;
    text-shadow: 0 0 60px rgba(102, 126, 234, 0.5);
}

@keyframes titleFloat {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.tagline {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Section Styles */
section {
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.fade-in {
    animation: cardFadeIn 0.6s ease forwards;
}

@keyframes cardFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: rgba(102, 126, 234, 0.3);
    background: rgba(30, 41, 59, 0.8);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    animation: iconBounce 2s ease-in-out infinite;
}

@keyframes iconBounce {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Support Section */
.support-content {
    max-width: 800px;
    margin: 0 auto;
}

.faq h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.faq-item {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateX(-20px);
}

.faq-item.fade-in {
    animation: slideInLeft 0.6s ease forwards;
}

@keyframes slideInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.faq-item:hover {
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.faq-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-light);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Privacy Policy Section */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

.privacy-card h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: var(--spacing-sm);
}

.privacy-card h4 {
    color: var(--primary-light);
    font-size: 1.1rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-xs);
}

.privacy-card a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.privacy-card a:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

/* Contact Section */
.contact {
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    opacity: 0;
    transform: scale(0.95);
}

.contact-content.fade-in {
    animation: scaleIn 0.6s ease forwards;
}

@keyframes scaleIn {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.contact-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.email-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: 1.125rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.email-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.email-button:hover::before {
    left: 100%;
}

.email-button:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(102, 126, 234, 0.5);
}

.email-button:active {
    transform: translateY(-1px) scale(1.02);
}

.email-icon {
    font-size: 1.5rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--spacing-2xl);
    color: var(--text-muted);
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-xl) 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .feature-card,
    .faq-item {
        break-inside: avoid;
    }
}