:root {
    --bg-body: #0f1115;
    --bg-surface: #181b21;
    --bg-surface-hover: #232730;
    --primary: #6366f1; /* Indigo */
    --primary-hover: #4f46e5;
    --accent: #ec4899; /* Pink */
    --text-main: #ffffff;
    --text-secondary: #9ca3af;
    --border: rgba(255, 255, 255, 0.08);
    --glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
    --container-width: 1100px;
    --font-main: "Inter", system-ui, -apple-system, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.08), transparent 25%);
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header / Nav */
.navbar {
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #fff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Hero Section */
.hero {
    padding: 60px 0 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 540px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 100px;
    color: #818cf8;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.hero-title span {
    color: var(--primary);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 90%;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--primary);
    color: white;
    font-weight: 600;
    padding: 16px 32px;
    border-radius: 100px;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
    width: fit-content;
}

.download-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(99, 102, 241, 0.4);
}

.download-btn:active {
    transform: translateY(0);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.stat-item h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    z-index: 2;
    width: 280px;
    border-radius: 40px;
    border: 8px solid #2a2d35;
    background: #181b21;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    aspect-ratio: 9/19;
}

.phone-mockup img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.visual-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
    z-index: 1;
    filter: blur(40px);
}

/* Features Grid */
.features {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.feature-card:hover {
    background: var(--bg-surface-hover);
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.2);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.nav-tag {
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.screen-carousel {
    position: relative;
    width: 100%;
    height: 100%;
}

.screen-carousel img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.screen-carousel img.active {
    opacity: 1;
}

/* FAQ Section */
.faq {
    padding: 80px 0;
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-trigger {
    width: 100%;
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-main);
}

.faq-trigger:hover {
    color: var(--primary);
}

.faq-icon {
    transition: transform 0.3s ease;
}

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

.faq-content {
    height: 0;
    overflow: hidden;
    transition: height 0.3s ease;
}

.faq-inner {
    padding-bottom: 24px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Footer */
.footer {
    padding: 60px 0 40px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 32px 0;
}

.footer-links a {
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

.copyright {
    color: rgba(156, 163, 175, 0.6);
    font-size: 0.875rem;
}

/* SEO Hidden */
.seo-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
        padding-top: 40px;
    }

    .hero-content {
        margin: 0 auto;
    }

    .hero-stats {
        justify-content: center;
    }

    .download-btn {
        width: 100%;
        max-width: 320px;
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}