:root {
    --safe-top: env(safe-area-inset-top, 20px);
    --safe-bottom: env(safe-area-inset-bottom, 20px);
    --safe-left: env(safe-area-inset-left, 20px);
    --safe-right: env(safe-area-inset-right, 20px);

    /* Default Theme Colors */
    --bg-color: #111;
    --text-color: #fff;
    --text-muted: #aaa;
    --text-title: rgba(255, 255, 255, 0.4);
    --primary-color: #4CAF50;
    --panel-bg: rgba(10, 10, 10, 0.85);
    --modal-bg-1: rgba(255, 255, 255, 0.1);
    --modal-bg-2: rgba(255, 255, 255, 0.05);
    --modal-border: rgba(255, 255, 255, 0.2);
    --btn-bg: rgba(255, 255, 255, 0.05);
    --btn-border: rgba(255, 255, 255, 0.15);
    --btn-hover: rgba(255, 255, 255, 0.15);
    --btn-primary-bg: rgba(76, 175, 80, 0.2);
    --btn-primary-hover: rgba(76, 175, 80, 0.4);
    --ai-stats-color: rgba(255, 255, 255, 0.7);
    --pause-icon: #ffffff;

    --ai-red: #FF5252;
    --ai-blue: #00BFFF;
    --ai-yellow: #FFD700;
}

body.theme-retro {
    --bg-color: #9bbc0f;
    --text-color: #0f380f;
    --text-muted: #306230;
    --text-title: rgba(15, 56, 15, 0.4);
    --primary-color: #0f380f;
    --panel-bg: rgba(139, 172, 15, 0.95);
    --modal-bg-1: rgba(15, 56, 15, 0.1);
    --modal-bg-2: rgba(15, 56, 15, 0.05);
    --modal-border: rgba(15, 56, 15, 0.3);
    --btn-bg: rgba(15, 56, 15, 0.1);
    --btn-border: rgba(15, 56, 15, 0.3);
    --btn-hover: rgba(15, 56, 15, 0.2);
    --btn-primary-bg: rgba(15, 56, 15, 0.2);
    --btn-primary-hover: rgba(15, 56, 15, 0.4);
    --ai-stats-color: rgba(15, 56, 15, 0.8);
    --pause-icon: #000000;

    --ai-red: #306230;
    --ai-blue: #306230;
    --ai-yellow: #306230;
}

body.theme-neon {
    --bg-color: #050510;
    --text-color: #e0e0ff;
    --text-muted: #8888aa;
    --text-title: rgba(0, 255, 255, 0.4);
    --primary-color: #39ff14;
    --panel-bg: rgba(5, 5, 20, 0.95);
    --modal-bg-1: rgba(0, 255, 255, 0.05);
    --modal-bg-2: rgba(255, 0, 255, 0.05);
    --modal-border: rgba(0, 255, 255, 0.3);
    --btn-bg: rgba(0, 255, 255, 0.1);
    --btn-border: rgba(0, 255, 255, 0.3);
    --btn-hover: rgba(0, 255, 255, 0.2);
    --btn-primary-bg: rgba(57, 255, 20, 0.2);
    --btn-primary-hover: rgba(57, 255, 20, 0.4);
    --ai-stats-color: rgba(0, 255, 255, 0.8);
    --pause-icon: #ffffff;

    --ai-red: #ff0055;
    --ai-blue: #00ffff;
    --ai-yellow: #ffee00;
}

body.theme-cats {
    --bg-color: #F8F9FA;
    --text-color: #333333;
    --text-muted: #888888;
    --text-title: var(--primary-color);
    --primary-color: #FFB3BA;
    --panel-bg: rgba(255, 255, 255, 0.95);
    --modal-bg-1: rgba(255, 255, 255, 0.9);
    --modal-bg-2: rgba(240, 240, 240, 0.9);
    --modal-border: rgba(0, 0, 0, 0.1);
    --btn-bg: rgba(0, 0, 0, 0.05);
    --btn-border: rgba(0, 0, 0, 0.1);
    --btn-hover: rgba(0, 0, 0, 0.1);
    --btn-primary-bg: rgba(255, 179, 186, 0.3);
    --btn-primary-hover: rgba(255, 179, 186, 0.6);
    --ai-stats-color: rgba(0, 0, 0, 0.6);
    --pause-icon: var(--primary-color);

    --ai-red: #B36D74;
    --ai-blue: #4E855C;
    --ai-yellow: #4E789B;
}

body {
    margin: 0;
    overflow: hidden;
    background-color: var(--bg-color);
    color: var(--text-color);
    touch-action: none;
    font-family: sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

canvas {
    display: block;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

#center-anchor {
    position: absolute;
    top: 45%;
    left: 0;
    width: 100%;
    height: 0;
    display: block;
    z-index: 20;
}

#hero-text {
    position: absolute;
    bottom: 10px;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 0 20px;
    box-sizing: border-box;
    transition: opacity 1s ease;
}

#mainTitle {
    font-family: "Arial Black", Impact, sans-serif;
    font-weight: 900;
    font-size: clamp(2rem, 8vw, 10rem);
    margin: 0;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-title);
    text-shadow: 0px 8px 25px rgba(0, 0, 0, 0.4);
    transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body.theme-cats #mainTitle {
    text-shadow: 0px 0px 20px var(--primary-color);
}

body.theme-cats #mainTitle svg {
    filter: drop-shadow(0px 0px 15px var(--primary-color)) !important;
}

#subTitle {
    position: absolute;
    top: 10px;
    left: 0;
    width: 100%;
    font-size: clamp(1rem, 3vw, 24px);
    color: var(--text-muted);
    margin: 0;
    transition: opacity 1s ease;
    text-shadow: 0px 2px 5px rgba(0, 0, 0, 0.5);
    text-align: center;
    letter-spacing: 2px;
}

body.theme-cats #subTitle {
    text-shadow: none;
}

#player-score {
    position: absolute;
    top: calc(var(--safe-top) + 5px);
    left: calc(var(--safe-left) + 6px);
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
    display: none;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
}

body.theme-cats #player-score {
    text-shadow: none;
}

#ai-stats {
    position: absolute;
    top: var(--safe-top);
    right: calc(var(--safe-right) + 60px);
    font-family: 'Courier New', Courier, monospace;
    font-size: 11px;
    font-weight: bold;
    color: var(--ai-stats-color);
    text-align: right;
    pointer-events: none;
    z-index: 5;
    white-space: pre;
    line-height: 1;
    display: flex;
    flex-direction: column;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.4);
}

body.theme-cats #ai-stats {
    text-shadow: none;
}

#overlay-message {
    position: absolute;
    top: 25%;
    left: 0;
    width: 100%;
    text-align: center;
    font-family: "Arial Black", Impact, sans-serif;
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: 900;
    color: var(--text-color);
    pointer-events: none;
    opacity: 0;
    transition: opacity 1s ease;
    text-shadow: 0px 4px 15px rgba(0, 0, 0, 0.8);
    z-index: 15;
    letter-spacing: 2px;
    text-transform: uppercase;
}

body.theme-cats #overlay-message {
    text-shadow: 0px 2px 10px rgba(0, 0, 0, 0.2);
}

#nav-container {
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    display: flex;
    gap: 15px;
    pointer-events: auto;
    flex-wrap: wrap;
    justify-content: center;
    transition: opacity 0.5s ease;
}

#game-menu {
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: opacity 1s ease;
}

.nav-btn,
.game-btn {
    padding: 12px 32px;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    color: var(--text-color);
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    border-radius: 50px;
    cursor: pointer;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 2px;
    text-decoration: none;
    text-align: center;
    box-sizing: border-box;
}

.game-btn {
    width: 220px;
    max-width: 80%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.game-btn.primary {
    background: var(--btn-primary-bg);
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-size: 1.2rem;
    padding: 16px 20px;
}

.nav-btn:hover,
.game-btn:hover {
    background: var(--btn-hover);
    transform: translateY(-3px);
    border-color: var(--text-color);
}

.game-btn.primary:hover {
    background: var(--btn-primary-hover);
    border-color: var(--text-color);
    color: var(--text-color);
}

body.theme-neon .nav-btn,
body.theme-neon .game-btn {
    box-shadow: 0 0 10px var(--btn-border);
    text-shadow: 0 0 5px var(--text-color);
}

.content-panel {
    position: absolute;
    top: 0;
    left: -100%;
    width: min(400px, 80%);
    height: 100%;
    background: var(--panel-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    transition: left 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 20;
    padding: 40px;
    padding-top: var(--safe-top);
    box-sizing: border-box;
    border-right: 1px solid var(--modal-border);
    display: flex;
    flex-direction: column;
    pointer-events: auto;
}

.content-panel.active {
    left: 0;
}

.content-modal::-webkit-scrollbar {
    width: 8px;
}

.content-modal::-webkit-scrollbar-track {
    background: transparent;
}

.content-modal::-webkit-scrollbar-thumb {
    background: var(--btn-border);
    border-radius: 10px;
}

.content-modal::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

.content-modal {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    opacity: 0;
    pointer-events: none;
    width: min(500px, 90%);
    background: linear-gradient(135deg, var(--modal-bg-1), var(--modal-bg-2));
    border-radius: 24px;
    padding: 20px 25px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 20;
    border: 1px solid var(--modal-border);
    box-sizing: border-box;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 90vh;
    overflow-y: auto;
    overscroll-behavior: contain;
}

body.theme-cats .content-modal {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.content-modal.active {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.content-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
    z-index: 30;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
}

body.theme-cats .content-overlay {
    background: rgba(255, 255, 255, 0.85);
}

.content-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.close-btn {
    margin-top: auto;
    padding: 12px 30px;
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    color: var(--text-color);
    border-radius: 50px;
    cursor: pointer;
    transition: 0.3s;
    align-self: center;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
}

.close-btn:hover {
    background: var(--btn-hover);
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: bold;
    padding: 6px 0;
    border-bottom: 1px solid var(--modal-border);
}

.setting-row:last-of-type {
    border-bottom: none;
}

input[type="checkbox"] {
    width: 24px;
    height: 24px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.slider-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 6px;
    margin-top: 5px;
    min-height: 44px;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: bold;
    text-transform: uppercase;
    padding: 0 5px;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: transparent;
    outline: none;
    height: 24px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 22px;
    width: 22px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    margin-top: -9px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

body.theme-cats input[type="range"]::-webkit-slider-thumb {
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: var(--btn-border);
    border-radius: 2px;
}

body.theme-retro input[type="range"]::-webkit-slider-thumb {
    border-radius: 0;
    height: 24px;
    width: 12px;
    box-shadow: none;
    border: 2px solid var(--bg-color);
    margin-top: -9px;
}

body.theme-retro input[type="range"]::-webkit-slider-runnable-track {
    background: var(--text-color);
    height: 6px;
    border-radius: 0;
}

body.theme-neon input[type="range"]::-webkit-slider-thumb {
    box-shadow: 0 0 15px var(--primary-color);
}

.theme-toggle {
    display: flex;
    gap: 4px;
    flex-wrap: nowrap;
    justify-content: flex-end;
}

.theme-btn {
    background: var(--btn-bg);
    color: var(--text-color);
    border: 1px solid var(--btn-border);
    padding: 6px 8px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.2s;
    font-size: 0.8rem;
}

.theme-btn.active {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 10px var(--primary-color);
}

body.theme-cats .theme-btn.active {
    box-shadow: none;
}

.help-text {
    font-size: 1rem;
    line-height: 1.6;
    text-align: left;
    color: var(--text-color);
}

.help-highlight {
    font-weight: bold;
}

.leaderboard-name {
    flex: 1;
    text-align: left;
    padding-left: 10px;
    color: var(--primary-color);
}

.setting-row.leaderboard-me {
    background: var(--btn-primary-bg) !important;
    border-radius: 12px;
    padding: 10px 15px;
    margin: 4px -10px;
    border-bottom: none;
}

.setting-row.leaderboard-me span {
    color: var(--text-color) !important;
}

@media (max-height: 500px) and (orientation: landscape) {
    #center-anchor {
        top: 40%;
    }

    #mainTitle {
        font-size: clamp(2rem, 15vh, 6rem);
    }

    #game-menu {
        flex-direction: row;
        top: 50px;
        gap: 10px;
    }

    .game-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        width: auto;
    }

    .game-btn.primary {
        padding: 10px 20px;
        font-size: 1rem;
    }

    .content-modal {
        padding: 10px 20px;
        gap: 5px;
        max-height: 95vh;
    }

    .setting-row {
        padding: 4px 0;
        font-size: 1rem;
    }
}

#pause-btn {
    position: absolute;
    top: calc(var(--safe-top) + 5px);
    right: 6px;
    width: 35px;
    height: 35px;
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    pointer-events: auto;
}

#pause-btn:hover {
    transform: scale(1.1);
    background: var(--btn-hover);
    border-color: var(--text-color);
}

body.theme-neon #pause-btn {
    box-shadow: 0 0 10px var(--btn-border);
}

#pause-btn svg {
    width: 18px;
    height: 18px;
    fill: var(--pause-icon);
    transition: fill 0.3s ease;
}

#pause-menu {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body.theme-cats #pause-menu {
    background: rgba(255, 255, 255, 0.5);
}

body.theme-retro #pause-menu {
    background: rgba(15, 56, 15, 0.25);
}

#pause-menu.active {
    opacity: 1;
    pointer-events: auto;
}

#pause-menu-content {
    background: linear-gradient(135deg, var(--modal-bg-1), var(--modal-bg-2));
    border: 1px solid var(--modal-border);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    min-width: 280px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

body.theme-cats #pause-menu-content {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

#pause-menu-content h2 {
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--text-color);
    font-size: 2rem;
    letter-spacing: 2px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

body.theme-cats #pause-menu-content h2 {
    text-shadow: none;
}