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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(to bottom, #1e3c72 0%, #2a5298 50%, #7ec8e3 100%);
    overflow: hidden;
}

.game-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

#gameCanvas {
    border: 3px solid #1a1a1a;
    background: linear-gradient(to bottom, #4a90e2 0%, #87ceeb 50%, #b0e0e6 100%);
    display: block;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    border-radius: 8px;
}

.start-screen,
.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.95);
    padding: 30px 40px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 10;
    max-width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.game-over-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.start-screen h1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.start-screen p {
    color: #555;
    margin-bottom: 20px;
    font-size: 1.1em;
    font-weight: 500;
}

.game-over h2 {
    color: #e74c3c;
    margin-bottom: 15px;
    font-size: 2em;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.game-over p {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.2em;
}

#finalScore {
    color: #27ae60;
    font-weight: bold;
    font-size: 1.5em;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 14px 35px;
    font-size: 1.1em;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    font-weight: 600;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

button:active {
    transform: translateY(0) scale(0.98);
}

.hidden {
    display: none;
}