:root {
    --ctp-base: #1e1e2e;
    --ctp-mantle: #181825;
    --ctp-crust: #11111b;
    --ctp-surface0: #313244;
    --ctp-surface1: #45475a;
    --ctp-subtext0: #a6adc8;
    --ctp-text: #cdd6f4;
    --ctp-lavender: #b4befe;
    --ctp-blue: #89b4fa;
    --ctp-mauve: #cba6f7;
    --ctp-green: #a6e3a1;
    --ctp-red: #f38ba8;
}

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

body {
    background-color: var(--ctp-base);
    color: var(--ctp-text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.top-nav {
    width: 100%;
    background-color: var(--ctp-mantle);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: center;
    border-bottom: 1px solid var(--ctp-surface1);
}

.back-link {
    color: var(--ctp-blue);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.15s ease;
}

.back-link:hover {
    color: var(--ctp-lavender);
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 24px;
    max-width: 600px;
    width: 100%;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

h1 {
    color: var(--ctp-lavender);
    font-size: 2rem;
}

.score-board {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--ctp-mantle);
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--ctp-surface1);
}

.score-label {
    color: var(--ctp-subtext0);
    font-size: 1rem;
}

.score-value {
    color: var(--ctp-green);
    font-size: 1.5rem;
    font-weight: bold;
}

.game-wrapper {
    position: relative;
    width: 500px;
    height: 500px;
    max-width: 100%;
    max-height: 100%;
    background-color: var(--ctp-crust);
    border-radius: 8px;
    border: 2px solid var(--ctp-surface1);
    overflow: hidden;
}

#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(17, 17, 27, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.overlay.hidden {
    display: none;
}

.overlay-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.overlay-content h2 {
    color: var(--ctp-lavender);
    font-size: 2rem;
}

.instructions {
    color: var(--ctp-subtext0);
    font-size: 0.9rem;
}

.final-score-label {
    color: var(--ctp-subtext0);
    font-size: 1.1rem;
}

.final-score-value {
    color: var(--ctp-green);
    font-size: 3rem;
    font-weight: bold;
}

.btn {
    padding: 10px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background-color: var(--ctp-blue);
    color: var(--ctp-base);
    font-weight: bold;
}

.btn-primary:hover {
    background-color: var(--ctp-lavender);
}

.btn-secondary {
    background-color: var(--ctp-surface0);
    color: var(--ctp-text);
}

.btn-secondary:hover {
    background-color: var(--ctp-surface1);
}

.btn-secondary:disabled,
.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.controls {
    display: flex;
    gap: 12px;
}

footer {
    color: var(--ctp-subtext0);
    font-size: 0.85rem;
    text-align: center;
}

@media (max-width: 600px) {
    .container {
        padding: 12px;
        gap: 12px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .game-wrapper {
        width: 100%;
        height: auto;
        aspect-ratio: 1 / 1;
    }

    header {
        flex-direction: column;
        gap: 8px;
    }
}