:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;
    --text-primary: #ffffff;
    --text-secondary: #a1a1a6;
    --text-tertiary: #86868b;
    --accent-primary: #3827F5;
    --accent-secondary: #6616C9;
    --accent-tertiary: #4a1fd9;
    --accent-gradient: linear-gradient(135deg, #3827F5 0%, #6616C9 100%);
    --accent-glow: 0 0 20px rgba(56, 39, 245, 0.3);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    --font-main: "SF Pro Display", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition-fast: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-font-smoothing: antialiased; }

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
ul { list-style: none; }

h1, h2, h3, h4 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.1; }
h1 { font-size: clamp(3rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: var(--spacing-sm); }
h3 { font-size: 1.4rem; margin-bottom: var(--spacing-xs); }
p { color: var(--text-secondary); font-size: 1.1rem; font-weight: 400; }

.text-center { text-align: center; }
.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* Layout */
.container { width: 90%; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-sm); }
.section-padding { padding: var(--spacing-xl) 0; }
.bg-secondary { background-color: var(--bg-secondary); }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-md); }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--spacing-md); }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--spacing-md); }
.align-center { align-items: center; }

/* Navbar */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%;
    z-index: 1000; padding: var(--spacing-sm) 0;
    transition: var(--transition-fast);
}
.glass-effect {
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 700; font-size: 1.25rem; letter-spacing: -0.01em; }
.nav-links { display: none; }
@media (min-width: 768px) {
    .nav-links { display: flex; gap: var(--spacing-md); }
    .nav-links a { font-size: 0.9rem; color: var(--text-secondary); }
    .nav-links a:hover { color: var(--text-primary); }
}

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.8rem 1.6rem; border-radius: 999px;
    font-weight: 500; font-size: 1rem; cursor: pointer;
    border: none; transition: var(--transition-fast);
}
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-large { padding: 1.2rem 2.4rem; font-size: 1.2rem; }
.btn-primary { background: var(--accent-gradient); color: #fff; font-weight: 600; }
.btn-primary:hover { box-shadow: var(--accent-glow); transform: scale(1.02); }
.btn-secondary { background: rgba(255,255,255,0.1); color: var(--text-primary); margin-left: var(--spacing-sm); }
.btn-secondary:hover { background: rgba(255,255,255,0.2); }

/* Hero */
.hero-section {
    padding-top: 120px;
    padding-bottom: var(--spacing-lg);
    text-align: center;
    min-height: 100vh;
    display: flex; flex-direction: column; justify-content: center;
    overflow: hidden;
}
.hero-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(56, 39, 245, 0.1);
    border: 1px solid rgba(56, 39, 245, 0.3);
    border-radius: 999px;
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}
.hero-title { margin-bottom: 1rem; }
.hero-subtitle {
    font-size: clamp(1.5rem, 4vw, 2.8rem);
    font-weight: 700; line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}
.hero-description { max-width: 580px; margin: 0 auto var(--spacing-md); }
.hero-buttons { margin-bottom: var(--spacing-lg); }

/* Hero Slideshow */
.hero-slideshow {
    display: flex; flex-direction: column;
    align-items: center; gap: 1.5rem;
    margin-top: var(--spacing-md);
}

.phone-frame {
    position: relative;
    width: 260px;
    height: 560px;
    background: #1a1a1a;
    border-radius: 44px;
    border: 6px solid #333;
    box-shadow: 0 30px 80px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.05), inset 0 0 0 1px rgba(255,255,255,0.05);
    overflow: hidden;
}

.phone-notch {
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 100px; height: 28px;
    background: #1a1a1a;
    border-radius: 0 0 18px 18px;
    z-index: 10;
}

.phone-screen {
    position: relative;
    width: 100%; height: 100%;
    overflow: hidden;
    border-radius: 38px;
    background: #000;
}

.hero-slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}
.hero-slide.active { opacity: 1; }

.slide-dots {
    display: flex; gap: 8px;
}
.dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    cursor: pointer;
    transition: var(--transition-fast);
}
.dot.active { background: var(--accent-primary); transform: scale(1.3); }

/* Tagline */
.tagline-section { background: var(--bg-primary); }
.tagline {
    font-size: clamp(1.8rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

/* Features */
.features-grid { margin-top: var(--spacing-lg); }
.feature-card {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition-fast);
}
.feature-card:hover { transform: translateY(-5px); border-color: rgba(56, 39, 245, 0.2); }
.feature-icon { font-size: 2.2rem; margin-bottom: var(--spacing-sm); }

/* How it works */
.steps-container {
    display: flex; flex-direction: column;
    gap: var(--spacing-md); margin-top: var(--spacing-lg);
}
@media (min-width: 768px) {
    .steps-container { flex-direction: row; justify-content: space-between; }
}
.step { flex: 1; position: relative; padding: var(--spacing-md); }
.step-number {
    font-size: 4rem; font-weight: 700;
    color: rgba(255,255,255,0.05);
    position: absolute; top: 0; left: 0;
    line-height: 1; z-index: 0;
}
.step-content { position: relative; z-index: 1; margin-top: 1rem; }

/* Demo Section */
.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}
.demo-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: var(--transition-fast);
}
.demo-item:hover { transform: translateY(-8px); box-shadow: 0 20px 50px rgba(0,0,0,0.6); }
.demo-item img { width: 100%; height: auto; display: block; }
.demo-label {
    position: absolute;
    top: 1rem; left: 1rem;
    padding: 0.5rem 1rem;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(10px);
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.demo-label-after {
    background: rgba(56, 39, 245, 0.2);
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
}

/* Screenshots */
.screenshots-grid {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}
.screenshot-item {
    flex: 0 1 180px;
    min-width: 120px;
    max-width: 200px;
    aspect-ratio: 9/19.5;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.1);
    background: #111;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: var(--transition-fast);
}
.screenshot-item:hover { transform: translateY(-8px) scale(1.02); box-shadow: 0 20px 50px rgba(0,0,0,0.6); }
.screenshot-item img { width: 100%; height: 100%; object-fit: cover; }

/* Detail features */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.detail-item {
    display: flex; gap: 1rem; align-items: flex-start;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition-fast);
}
.detail-item:hover { border-color: rgba(56, 39, 245, 0.2); transform: translateY(-3px); }
.detail-icon { font-size: 2rem; flex-shrink: 0; }
.detail-item h4 { color: var(--text-primary); margin-bottom: 0.4rem; font-size: 1.1rem; }

/* Problems Section */
.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}
.problem-card {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition-fast);
}
.problem-card:hover { transform: translateY(-5px); border-color: rgba(56, 39, 245, 0.2); }
.problem-icon { font-size: 2.5rem; margin-bottom: var(--spacing-sm); }
.problem-card h4 { color: var(--text-primary); margin-bottom: 0.5rem; font-size: 1.1rem; }

/* Niches */
.niches-grid { margin-top: var(--spacing-lg); }
.niche-card {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.05);
    text-align: center;
    transition: var(--transition-fast);
}
.niche-card:hover { transform: translateY(-5px); border-color: rgba(56, 39, 245, 0.2); }
.niche-icon { font-size: 2.5rem; margin-bottom: var(--spacing-sm); }
.niche-card h4 { color: var(--text-primary); margin-bottom: 0.5rem; }

/* Privacy */
.privacy-section {
    background: linear-gradient(180deg, #000 0%, #0a0a0a 100%);
}
.privacy-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(56, 39, 245, 0.1);
    border-radius: 999px;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 600;
    border: 1px solid rgba(56, 39, 245, 0.3);
}
.privacy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}
.privacy-feature {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition-fast);
}
.privacy-feature:hover { transform: translateY(-5px); border-color: var(--accent-primary); }
.p-icon { font-size: 2.5rem; display: block; margin-bottom: var(--spacing-sm); }
.privacy-feature h4 { color: var(--text-primary); margin-bottom: 0.5rem; }

/* CTA Final */
.cta-final { background: var(--bg-primary); }

/* Contact */
.contact-card {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    max-width: 400px;
    margin: 2rem auto;
    border: 1px solid rgba(255,255,255,0.05);
}

/* Footer */
.footer { border-top: 1px solid rgba(255,255,255,0.1); padding: var(--spacing-lg) 0; }
.footer-content { display: flex; flex-direction: column; gap: var(--spacing-lg); }
@media (min-width: 768px) { .footer-content { flex-direction: row; justify-content: space-between; } }
.footer-links { display: flex; gap: var(--spacing-lg); flex-wrap: wrap; }
.link-group { display: flex; flex-direction: column; gap: 0.5rem; }
.link-group h4 { font-size: 0.9rem; text-transform: uppercase; color: var(--text-tertiary); margin-bottom: 0.5rem; }
.link-group a { color: var(--text-secondary); }
.link-group a:hover { color: var(--text-primary); }

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in-up { opacity: 0; animation: fadeInUp 0.8s var(--transition-smooth) forwards; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

.scroll-reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s var(--transition-smooth); }
.scroll-reveal.active { opacity: 1; transform: translateY(0); }

/* Section titles */
.section-title { margin-bottom: var(--spacing-sm); }
.section-description { font-size: 1.1rem; }

@media (max-width: 768px) {
    .section-padding { padding: 4rem 0; }
    .hero-section { padding-top: 100px; }
    .phone-frame { width: 220px; height: 475px; }
    .screenshot-item { flex: 0 1 140px; }
}