:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #151515;
    --accent-bg: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #a8a8a8;
    --text-muted: #666666;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Background Effects */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.3) 0%, transparent 90%),
                radial-gradient(ellipse at bottom right, rgba(245, 87, 108, 0.15) 0%, transparent 90%);
    z-index: -1;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem 2rem;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #ffffff !important;
    font-weight: 600;
    font-size: 1.25rem;
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: #ffffff !important;
    background-clip: unset !important;
}

.logo span,
.logo:not(img) {
    color: #ffffff !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: #ffffff !important;
    background-clip: unset !important;
}

.logo-text {
    color: #ffffff !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: #ffffff !important;
    background-clip: unset !important;
}

.logo img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
    animation: fadeInUp 1s ease 0.2s both;
}

.app-icon {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    margin: 0 auto 2rem;
    box-shadow: var(--shadow-strong);
    animation: float 6s ease-in-out infinite;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    -webkit-background-clip: text;
    -webkit-text-fill-color: #ffffff !important;
    background-clip: text;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.app-store-btn {
    display: inline-block;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.app-store-btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

.app-store-btn img {
    height: 60px;
    width: auto;
}

.feature-highlight {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.features-header {
    text-align: center;
    margin-bottom: 5rem;
}

.features-title {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* App Preview */
.app-preview {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    margin: 4rem auto;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.app-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
}

.preview-content {
    text-align: center;
    margin-bottom: 3rem;
}

.preview-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.preview-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.preview-gallery-container {
    position: relative;
    overflow: hidden;
    padding: 1rem 0;
}

.preview-gallery {
    display: flex;
    gap: 1.5rem;
    animation: autoScroll 30s linear infinite;
    width: fit-content;
}

.preview-gallery:hover {
    animation-play-state: paused;
}

.preview-image {
    flex: 0 0 auto;
    width: 280px;
    height: auto;
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease;
    object-fit: cover;
}

.preview-image:hover {
    transform: translateY(-8px);
}

/* CSS mask creates true transparency fade on desktop */

/* Auto-scroll animation */
@keyframes autoScroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(calc(-50% - 0.75rem));
    }
}

/* Mindset Section */
.mindset {
    padding: 3rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.mindset-content {
    text-align: center;
}

.mindset-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mindset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.mindset-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: left;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
}

.mindset-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-strong);
    border-color: var(--accent-color);
}

.mindset-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.mindset-item p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Research Studies Styles */
.research-studies {
    margin: 3rem 0;
}

.study-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 0.5rem 2rem 0.5rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
}

.study-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-strong);
    border-color: var(--accent-color);
}

.study-item h3 {
    margin-top: 0 !important;
    margin-bottom: 1rem;
    padding-top: 1rem !important;
    font-size: 1.4rem;
    font-weight: 600;
    font-style: italic;
}

.study-item h3 a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.study-item h3 a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.study-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 1rem;
    border-left: 4px solid gray;
    padding-left: 1rem;
}

.study-citation {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

.key-findings {
    margin: 3rem 0;
}

.practical-applications {
    margin: 3rem 0;
}

.practical-applications p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* Evidence Section */
.evidence {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.evidence-content {
    max-width: 800px;
    margin: 0 auto;
}

.evidence-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.evidence-cta {
    margin-top: 2rem;
}

.evidence-link {
    display: inline-block;
    color: var(--accent-color);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    transition: all 0.3s ease;
    background: transparent;
}

.evidence-link:hover {
    background: var(--accent-color);
    color: var(--primary-bg);
    transform: translateY(-2px);
}

/* Content Sections */
.content {
    max-width: 800px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content h2 {
    font-size: 2rem;
    font-weight: 600;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}

.content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 1.5rem 0 1rem;
    color: var(--text-primary);
}

.content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.content ul, .content ol {
    margin: 1rem 0 1rem 2rem;
    color: var(--text-secondary);
}

.content li {
    margin-bottom: 0.5rem;
}

/* Document-specific styles for Privacy and EULA pages */
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.document-header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeInUp 0.8s ease;
}

.document-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.effective-date {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.document-content {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.document-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-secondary);
}

.intro-text {
    font-size: 1rem;
    /* color: var(--text-secondary); */
    margin-bottom: 2rem;
    padding: 1.5rem;
    text-align: center;
}

.notice {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
    font-weight: 500;
    text-align: center;
}

.section {
    margin-bottom: 3rem;
}

.section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    /* border-left: 4px solid var(--accent-color); */
    /* padding-left: 1rem; */
}

.section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
    color: var(--text-secondary);
}

.section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.section ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.section li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.section a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.section a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.highlight-box {
    background: var(--accent-bg);
    border-radius: 16px;
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid var(--glass-border);
    position: relative;
}

.highlight-box::before {
    content: '🔒';
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
}

/* Research page specific highlight box */
.research-highlight::before {
    content: '🔬';
}

.data-category {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.data-category h4 {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.contact-info {
    background: var(--accent-bg);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    margin: 2rem 0;
    border: 1px solid var(--glass-border);
}

.contact-info h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* Contact Section */
.contact {
    text-align: center;
    padding: 6rem 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
}

.contact-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.contact-email {
    font-size: 1.25rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-email:hover {
    color: var(--accent-hover);
}

/* Footer */
.footer {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

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

.footer-text {
    color: var(--text-muted);
    font-size: 0.8rem;
}

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

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

/* Desktop - show fade effects */
@media (min-width: 769px) {
    .preview-gallery-container {
        mask: linear-gradient(to right, transparent 0%, black 120px, black calc(100% - 120px), transparent 100%);
        -webkit-mask: linear-gradient(to right, transparent 0%, black 120px, black calc(100% - 120px), transparent 100%);
    }
    
    .preview-gallery {
        animation-duration: 40s; /* Slower on desktop */
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero {
        padding: 0 1rem;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .features {
        padding: 4rem 1rem;
    }

    .features-title {
        font-size: 2.5rem;
    }

    .app-preview {
        padding: 2rem 1rem;
        margin: 2rem 1rem;
    }

    .preview-title {
        font-size: 2rem;
    }

    .preview-gallery {
        gap: 1rem;
        animation-duration: 25s; /* Faster on mobile */
    }

    .preview-image {
        width: 240px;
    }

    .contact {
        padding: 4rem 1rem;
    }

    .contact-title {
        font-size: 2rem;
    }

    .content {
        padding: 6rem 1rem 2rem;
    }

                .content h1 {
                font-size: 2.5rem;
            }

            .main-content {
                padding: 6rem 1rem 3rem;
            }

            .document-title {
                font-size: 2.3rem;
            }

            .document-content {
                padding: 2rem 1.5rem;
            }

            .section h2 {
                font-size: 1.5rem;
            }

            .footer-links {
                gap: 1rem;
                flex-direction: column;
            }
        }

@media (max-width: 480px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .preview-image {
        width: 220px;
    }

    .content h1 {
        font-size: 2rem;
    }

    .document-title {
        font-size: 1.5rem;
    }

    .document-content {
        padding: 1.5rem 1rem;
    }
}