:root {
    --bg-dark: #1e1e1e;
    --text-light: #ffffff;
    --text-dark: #2d3748;
    --text-muted: #718096;
    --accent: #ffffff;
    --accent-secondary: #667eea;
    --bg-body: #f7fafc;
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-dark);
    -webkit-font-smoothing: antialiased;
}

/* Header */
header {
    background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    color: var(--text-light);
    padding-top: 60px;
    position: relative;
    overflow: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    padding-bottom: 180px; /* Space for the wave backdrop */
    position: relative;
    z-index: 10;
}

.header-image {
    flex: 1;
    display: flex;
    justify-content: center;
    margin-bottom: -120px; /* Overlap the wave even more */
}

.header-image img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    /* Box shadow removed */
    transform: rotate(-3deg) scale(1);
    max-height: 480px; /* Slightly larger */
    object-fit: contain;
    transition: transform 0.3s ease;
}

.header-image img:hover {
    transform: rotate(-1deg) scale(1.02);
}

.header-text {
    flex: 1;
}

header h1 {
    font-size: 3.5rem;
    margin: 0 0 20px 0;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2); /* Help text stand out on backdrop */
}

.subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    color: rgba(255,255,255,0.9);
    font-weight: 400;
    line-height: 1.6;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.btn-download {
    display: inline-block;
    background-color: var(--accent);
    color: #1a202c;
    padding: 16px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.125rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    z-index: 11; /* Ensure button is above backdrop */
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    background-color: #ffffff;
}

/* Wave Backdrop */
.wave-container {
    line-height: 0;
    width: 100%;
    position: absolute; /* Set as backdrop */
    bottom: 0;
    left: 0;
    z-index: 1;
    pointer-events: none; /* Don't block clicks */
}

.wave-container svg {
    display: block;
    width: 100%;
    height: auto;
    max-height: 360px; /* Taller backdrop */
}

/* Main Content */
main {
    padding: 0 0 100px 0; /* Top padding removed */
}

.content-container {
    max-width: 900px;
}

/* Typography for Markdown Content */
main h1, main h2, main h3 {
    margin-top: 6rem;
    margin-bottom: 2.5rem;
    color: #1a202c;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.02em;
}

main h1:first-of-type {
    margin-top: 2rem; /* Add some top margin for the first heading to breathe */
}

main h1 { font-size: 2.25rem; border-bottom: 2px solid #e2e8f0; padding-bottom: 0.5rem; }
main h2 { font-size: 1.875rem; }
main h3 { font-size: 1.5rem; }

main p {
    line-height: 1.8;
    font-size: 1.125rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

main ul, main ol {
    margin-bottom: 2rem;
    padding-left: 2rem;
    font-size: 1.125rem;
    color: var(--text-dark);
    line-height: 1.8;
}

/* Feature Grid Styling */
/* Target the first UL after the first H1 (Features) */
main h1:first-of-type + ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    padding: 0;
    list-style: none;
}

main h1:first-of-type + ul li {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid #edf2f7;
}

main h1:first-of-type + ul li:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

main h1:first-of-type + ul li strong {
    display: block;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: #2b6cb0; /* Accent color for titles */
}

/* Footer */
footer {
    background-color: #1a202c;
    color: #a0aec0;
    padding: 60px 0;
    text-align: center;
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 850px) {
    .header-container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .header-image img {
        transform: rotate(0);
        max-width: 90%;
        margin-bottom: 20px;
    }

    header h1 {
        font-size: 2.5rem;
    }
    
        .subtitle {
    
            font-size: 1.125rem;
    
        }

        .btn-download {
    
            display: block;
    
            margin: 10px auto;
    
            max-width: 250px;
    
        }
    
    }