:root {
    --bg-color: #0F172A;
    --surface-color: #1E293B;
    --primary-color: #06B6D4;
    --secondary-color: #A855F7;
    --accent-green: #22C55E;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.navbar {
    padding: 20px 0;
    position: sticky;
    top: 0;
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 700;
    font-size: 1.2rem;
}

.logo img {
    height: 40px;
    width: 40px;
    border-radius: 8px;
}

nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

nav a {
    color: var(--text-muted);
    font-weight: 500;
}

nav a:hover {
    color: var(--primary-color);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-color) !important;
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 700 !important;
}

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

/* Hero */
.hero {
    position: relative;
    padding: 80px 0 150px 0;
    background: radial-gradient(circle at top right, rgba(6, 182, 212, 0.1), transparent 40%),
                radial-gradient(circle at bottom left, rgba(168, 85, 247, 0.1), transparent 40%);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-text .highlight {
    color: var(--primary-color);
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn-main {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px 40px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.3);
}

.btn-main:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(6, 182, 212, 0.4);
}

.btn-outline {
    border: 2px solid rgba(255,255,255,0.2);
    padding: 15px 40px;
    border-radius: 12px;
    font-weight: 600;
}

.btn-outline:hover {
    border-color: var(--text-main);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.pulsating-brain {
    font-size: 250px; /* Big icon as placeholder */
    color: var(--secondary-color);
    filter: drop-shadow(0 0 50px rgba(168, 85, 247, 0.5));
    animation: pulse 3s infinite ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); filter: drop-shadow(0 0 30px rgba(168, 85, 247, 0.3)); }
    50% { transform: scale(1.05); filter: drop-shadow(0 0 60px rgba(168, 85, 247, 0.6)); }
    100% { transform: scale(1); filter: drop-shadow(0 0 30px rgba(168, 85, 247, 0.3)); }
}

.wave-bottom {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    line-height: 0;
}

.wave-bottom svg {
    display: block;
    width: 100%;
    height: 100px;
}

/* Features */
.features {
    padding: 100px 0;
    background-color: var(--surface-color);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255,255,255,0.05);
    padding: 40px;
    border-radius: 20px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    background-color: rgba(255, 255, 255, 0.05);
}

.icon-box {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 25px;
}

.color-cyan { background: rgba(6, 182, 212, 0.1); color: var(--primary-color); }
.color-purple { background: rgba(168, 85, 247, 0.1); color: var(--secondary-color); }
.color-green { background: rgba(34, 197, 94, 0.1); color: var(--accent-green); }

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-muted);
}

/* How to Play */
.how-to {
    padding: 100px 0;
}

.steps {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 250px;
    text-align: center;
    position: relative;
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    background-color: var(--surface-color);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.step h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

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

/* Download Section */
.download-section {
    padding: 100px 0;
    background: linear-gradient(to right, #1E293B, #0F172A);
    text-align: center;
}

.download-box {
    background: rgba(255,255,255,0.05);
    border-radius: 30px;
    padding: 60px;
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid rgba(255,255,255,0.1);
}

.download-box h2 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    background-color: var(--accent-green);
    color: #000;
    padding: 20px 60px;
    border-radius: 15px;
    font-weight: 800;
    font-size: 1.3rem;
    margin: 30px 0;
}

.btn-download:hover {
    transform: scale(1.05);
    background-color: #4ade80;
}

.small-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Footer */
footer {
    padding: 50px 0;
    background-color: #0B1120;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-right {
    text-align: right;
}

.website-link {
    color: var(--primary-color);
    font-weight: 600;
}

.social-icon {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin: 0 10px;
}

.social-icon:hover {
    color: var(--text-main);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* Hide nav links on mobile for simplicity, or use hamburger */
    }
    
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: 40px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .pulsating-brain {
        font-size: 150px;
        margin-bottom: 30px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-right {
        text-align: center;
    }
}