:root {
    --bg-dark: #111827;
    --bg-card: #1f2937;
    --accent-teal: #2DD4BF;
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --container-width: 1000px;
    --font-heading: 'inter', sans-serif;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: radial-gradient(circle at top right, rgba(45, 212, 191, 0.1), transparent 40%);
    padding: 40px 0 80px;
    text-align: center;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 60px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-teal);
    letter-spacing: -0.5px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 30px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--accent-teal);
}

.hero-title {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, #9ca3af);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.cta-button {
    display: inline-block;
    background: var(--accent-teal);
    color: #111827;
    padding: 14px 32px;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(45, 212, 191, 0.3);
}

/* App Showcase */
.app-showcase {
    margin-top: 60px;
    width: 100%;
}

.screenshot-scroll {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    padding: 20px 20px 40px;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    /* Firefox */
    -ms-overflow-style: none;
    /* IE/Edge */
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.screenshot-scroll::-webkit-scrollbar {
    display: none;
}

.screenshot-scroll img {
    height: 400px;
    width: auto;
    border-radius: 12px;
    box-shadow:
        0 20px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    scroll-snap-align: center;
    transition: transform 0.3s ease;
}

.screenshot-scroll img:hover {
    transform: translateY(-10px) scale(1.02);
    z-index: 10;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 32px;
    text-align: center;
    margin-bottom: 60px;
}

/* Features */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(45, 212, 191, 0.2);
}

.icon-box {
    width: 48px;
    height: 48px;
    background: rgba(45, 212, 191, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-teal);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 10px;
    font-size: 20px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Guide */
.guide {
    background: #0f1522;
    /* Slightly darker */
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-teal);
    opacity: 0.5;
    min-width: 40px;
}

.step-content h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
}

/* Credits */
.credits {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 60px 0;
}

.tech-stack {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin: 20px 0;
}

.tech-stack span {
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 12px;
    border-radius: 99px;
    font-size: 12px;
    color: var(--text-secondary);
}

.copyright {
    color: var(--text-secondary);
    font-size: 14px;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 20px;
    }

    .nav-links a {
        margin: 0 15px;
    }

    .hero-title {
        font-size: 36px;
    }
}