:root {
    --bg-color: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --accent-color: #ff6b81;
    --success-color: #2ed573;
    --danger-color: #ff4757;
    --glass-border: 2px solid rgba(255, 255, 255, 0.8);
    --font-family: 'Inter', system-ui, sans-serif;
}

body {
    background: linear-gradient(135deg, #FBDA61 0%, #FF5ACD 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.card {
    background: var(--card-bg);
    border: var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: linear-gradient(45deg, #ff6b81, #ff4757);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 71, 87, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(255, 71, 87, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

.btn-secondary:hover {
    background: var(--accent-color);
    color: white;
}

/* Forms */
input[type="text"],
input[type="number"] {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1.2rem;
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.1rem;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(255, 107, 129, 0.2);
}

/* Game Canvas */
#gameCanvas {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    border: 4px solid white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 0 auto;
}

/* Player Controller */
.d-pad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 15px;
    width: 300px;
    height: 300px;
    margin: 2rem auto;
}

.control-btn {
    background: white;
    border: none;
    border-radius: 15px;
    color: var(--accent-color);
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 8px 0 rgba(0, 0, 0, 0.1);
    transition: all 0.1s;
}

.control-btn:active {
    transform: translateY(4px);
    box-shadow: 0 4px 0 rgba(0, 0, 0, 0.1);
    background: var(--accent-color);
    color: white;
}

.up {
    grid-column: 2;
    grid-row: 1;
}

.left {
    grid-column: 1;
    grid-row: 2;
}

.right {
    grid-column: 3;
    grid-row: 2;
}

.down {
    grid-column: 2;
    grid-row: 3;
}

/* Leaderboard */
.leaderboard {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 250px;
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 15px;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.leaderboard h3 {
    margin-top: 0;
    border-bottom: 2px solid rgba(0, 0, 0, 0.05);
    padding-bottom: 0.8rem;
    color: var(--accent-color);
    font-weight: 800;
    text-transform: uppercase;
    font-size: 1.2rem;
}

.player-score {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 0;
    font-weight: 600;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.player-score:last-child {
    border-bottom: none;
}