* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0a1a3a 0%, #1a3a6a 100%);
    color: #fff;
    min-height: 100vh;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(0, 20, 50, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #00d4ff;
    text-shadow: 0 0 10px rgba(0,212,255,0.5);
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}
.nav-links a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s, text-shadow 0.3s;
}
.nav-links a:hover {
    color: #00d4ff;
    text-shadow: 0 0 10px rgba(0,212,255,0.7);
}
.hamburger {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #0a1a3a, #1a3a6a);
    border-bottom: 2px solid #00d4ff;
}
.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #00d4ff;
    text-shadow: 0 0 20px rgba(0,212,255,0.5);
}
.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #ccc;
}
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: linear-gradient(135deg, #00d4ff, #0088cc);
    color: #fff;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(0,212,255,0.3);
}
.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0,212,255,0.5);
}
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
.stat-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
    transition: transform 0.3s;
}
.stat-card:hover {
    transform: scale(1.05);
}
.stat-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #00d4ff;
}
.stat-card p {
    font-size: 2rem;
    font-weight: bold;
}
.features {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
.features h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: #00d4ff;
}
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}
.feature-item {
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255,255,255,0.2);
}
.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,212,255,0.2);
}
.feature-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #00d4ff;
}
.game-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
#gameCanvasWrapper {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(0,212,255,0.3);
}
#gameCanvas {
    display: block;
    background: linear-gradient(180deg, #0a1a3a, #1a3a6a);
    cursor: crosshair;
}
#gameUI {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 1.5rem;
    min-width: 250px;
    border: 1px solid rgba(255,255,255,0.2);
}
.game-stats p {
    margin: 0.8rem 0;
    font-size: 1.1rem;
}
.game-controls {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-top: 1rem;
}
.popup {
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,212,255,0.9);
    color: #fff;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-size: 1.2rem;
    z-index: 1000;
    animation: fadeInOut 2s ease-in-out;
}
@keyframes fadeInOut {
    0% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
    20% { opacity: 1; transform: translateX(-50%) translateY(0); }
    80% { opacity: 1; }
    100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
}
.hidden { display: none; }
.shop-grid, .achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
.shop-item, .achievement-card {
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
    transition: transform 0.3s;
}
.shop-item:hover, .achievement-card:hover {
    transform: scale(1.05);
}
.price {
    font-size: 1.5rem;
    color: #ffd700;
    margin: 1rem 0;
}
.leaderboard-container, .achievements-container {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}
.leaderboard-container h2, .achievements-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #00d4ff;
}
#leaderboardList {
    list-style: none;
}
#leaderboardList li {
    background: rgba(255,255,255,0.1);
    margin: 0.5rem 0;
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    font-size: 1.1rem;
}
.admin-form {
    max-width: 500px;
    margin: 2rem auto;
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 15px;
}
.admin-form label {
    display: block;
    margin: 1rem 0;
    color: #ccc;
}
.admin-form input, .admin-form textarea {
    width: 100%;
    padding: 0.5rem;
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 5px;
    color: #fff;
    margin-top: 0.3rem;
}
.login-form {
    max-width: 400px;
    margin: 5rem auto;
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
}
.login-form input {
    width: 100%;
    padding: 0.8rem;
    margin: 0.5rem 0;
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 5px;
    color: #fff;
}
.success {
    color: #00ff88;
    text-align: center;
    margin: 1rem 0;
}
.error {
    color: #ff4444;
    text-align: center;
    margin: 1rem 0;
}
footer {
    text-align: center;
    padding: 1.5rem;
    background: rgba(0,20,50,0.9);
    margin-top: 2rem;
}
footer a {
    color: #00d4ff;
    text-decoration: none;
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: rgba(0,20,50,0.95);
        position: absolute;
        top: 60px;
        left: 0;
        padding: 1rem;
    }
    .nav-links.active {
        display: flex;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
    .game-container {
        flex-direction: column;
        align-items: center;
    }
    #gameCanvas {
        width: 100%;
        height: auto;
    }
}