:root {
    --bg-color: #0f0c29;
    --game-bg: rgba(20, 20, 30, 0.8);
    --text-color: #ffffff;
    --snake-color: #00ff87;
    --food-color: #ff0055;
    --accent-color: #60efff;
    --grid-color: rgba(255, 255, 255, 0.03);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
    /* 防止移动端双击缩放和高亮 */
    -webkit-tap-highlight-color: transparent;
}

html {
    background-color: var(--bg-color);
}

body {
    background: linear-gradient(135deg, var(--bg-color), #302b63, #24243e);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    touch-action: none; /* 禁止默认触摸动作，如缩放 */
}

.game-container {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    max-height: 100vh;
    overflow-y: auto;
    position: relative; /* 为绝对定位按钮提供参考 */
}

.top-controls {
    display: none; /* 默认隐藏，仅移动端显示 */
}

.header-main {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

/* 震动动画 */
@keyframes shake {
    0% { transform: translate(0, 0); }
    25% { transform: translate(-5px, 5px); }
    50% { transform: translate(5px, -5px); }
    75% { transform: translate(-5px, -5px); }
    100% { transform: translate(0, 0); }
}

.shake {
    animation: shake 0.2s cubic-bezier(.36,.07,.19,.97) both;
}

header {
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    flex-shrink: 0;
    padding: 0 10px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(45deg, var(--snake-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 255, 135, 0.3);
    text-align: left;
}

.score-board {
    display: flex;
    gap: 20px;
    width: 100%;
    justify-content: flex-start;
}

.score-box {
    background: rgba(0, 0, 0, 0.4);
    padding: 10px 20px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
}

.score-box span:first-child {
    font-size: 0.8rem;
    color: #a0a0b0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.score-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-color);
    text-shadow: 0 0 10px rgba(96, 239, 255, 0.5);
}

.canvas-wrapper {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5), 
                0 0 20px rgba(0, 255, 135, 0.2) inset;
    border: 2px solid rgba(255, 255, 255, 0.1);
    background-color: var(--game-bg);
    flex-shrink: 0;
    width: 400px;
    height: 400px;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    image-rendering: auto; /* 更改为 auto 以获得更平滑的渲染 */
    object-fit: contain; /* 保持比例并包含在容器内 */
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay h2 {
    font-size: 2.5rem;
    color: var(--food-color);
    text-shadow: 0 0 15px rgba(255, 0, 85, 0.6);
    margin-bottom: 10px;
}

.overlay p {
    font-size: 1.2rem;
    color: #e0e0e0;
}

#final-score {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--snake-color);
}

.glow-on-hover {
    padding: 12px 30px;
    border: none;
    outline: none;
    color: #fff;
    background: #111;
    cursor: pointer;
    position: relative;
    z-index: 0;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.glow-on-hover:before {
    content: '';
    background: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
    position: absolute;
    top: -2px;
    left:-2px;
    background-size: 400%;
    z-index: -1;
    filter: blur(5px);
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    animation: glowing 20s linear infinite;
    opacity: 0;
    transition: opacity .3s ease-in-out;
    border-radius: 10px;
}

.glow-on-hover:active {
    color: #000;
    transform: scale(0.95);
}

.glow-on-hover:active:after {
    background: transparent;
}

.glow-on-hover:hover:before {
    opacity: 1;
}

.glow-on-hover:after {
    z-index: -1;
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(30, 30, 40, 0.8);
    left: 0;
    top: 0;
    border-radius: 10px;
}

@keyframes glowing {
    0% { background-position: 0 0; }
    50% { background-position: 400% 0; }
    100% { background-position: 0 0; }
}

.controls-hint {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px 25px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.controls-hint p {
    font-size: 0.9rem;
    color: #b0b0c0;
    margin: 5px 0;
}

/* 虚拟控制按钮样式 */
.virtual-controls {
    display: none; /* 默认隐藏 */
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    width: 100%;
    padding-bottom: 10px;
    user-select: none;
}

.control-row {
    display: flex;
    gap: 15px;
    justify-content: center;
    width: 100%;
}

.d-pad-btn {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    cursor: pointer;
    backdrop-filter: blur(5px);
    transition: all 0.1s ease;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}

.d-pad-btn svg {
    width: 32px;
    height: 32px;
    pointer-events: none; /* 防止点击SVG不触发按钮事件 */
}

.d-pad-spacer {
    width: 65px;
    height: 65px;
    visibility: hidden;
}

.d-pad-btn:active, .d-pad-btn.active {
    background: var(--snake-color);
    color: #000;
    transform: scale(0.92);
    box-shadow: 0 0 20px var(--snake-color), inset 0 0 10px rgba(0,0,0,0.5);
    border-color: var(--snake-color);
}

/* 移动端特定控件 - 默认隐藏 */
.mobile-controls-area {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.switch-btn {
    background: rgba(0, 255, 135, 0.15);
    border: 1px solid var(--snake-color);
    color: var(--snake-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

/* 网格模式颜色 */
.switch-btn.grid-mode {
    background: rgba(0, 255, 135, 0.15);
    border-color: var(--snake-color);
    color: var(--snake-color);
}

/* 自由模式颜色 */
.switch-btn.free-mode {
    background: rgba(96, 239, 255, 0.15);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.switch-btn:active {
    transform: scale(0.95);
}

/* 摇杆样式 */
#joystick-container {
    width: 100%;
    height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

#joystick-container.hidden, #dpad-container.hidden {
    display: none !important;
}

#joystick-zone {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    position: relative;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3) inset;
}

#joystick-knob {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--snake-color);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 10px var(--snake-color);
    pointer-events: none; /* 让触摸事件穿透到 zone */
    transition: transform 0.1s; /* 添加一点平滑回弹，但在拖动时我们会覆盖这个 */
}

.joystick-hint {
    margin-top: 10px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

/* 移动端适配 */
@media (max-width: 768px) {
    body {
        align-items: flex-start; /* 防止键盘弹出遮挡 */
        padding-top: 0;
        overflow-y: hidden; /* 禁止页面滚动 */
        height: 100vh;
        position: fixed; /* 锁定页面 */
        width: 100%;
    }

    .game-container {
        width: 100%;
        max-width: 100%;
        height: 100vh;
        border-radius: 0;
        border: none;
        padding: 10px;
        justify-content: flex-start;
        gap: 10px;
        background: linear-gradient(180deg, rgba(15, 12, 41, 0.95) 0%, rgba(30, 25, 60, 0.95) 100%);
        box-shadow: none;
        backdrop-filter: none;
        overflow: hidden;
        position: relative;
    }

    .top-controls.mobile-only {
        display: block; /* 仅移动端显示 */
        position: static;
    }
    
    header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 5px 10px;
        height: auto;
        min-height: 50px;
        gap: 10px;
        margin-bottom: 5px;
        width: 100%;
    }

    h1 {
        display: none; 
    }
    
    .header-main {
        width: auto;
        flex: 1;
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: flex-start;
    }

    .score-board {
        width: auto;
        display: flex;
        justify-content: flex-start;
        gap: 8px;
    }

    .score-box {
        min-width: 70px;
        padding: 4px 10px;
        flex: none;
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 0;
        background: rgba(0, 0, 0, 0.3);
    }

    .score-box span:first-child {
        font-size: 0.6rem;
    }

    .score-value {
        font-size: 1.1rem;
    }
    
    .top-controls {
        display: block !important;
        margin-left: auto;
        width: auto;
    }

    .switch-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    .canvas-wrapper {
        width: 100%;
        max-width: none; 
        height: auto;
        flex: 1; /* 核心：占据中间剩余的所有空间 */
        display: flex;
        justify-content: center;
        align-items: center;
        margin: 0;
        background: rgba(0,0,0,0.2);
        border-radius: 5px;
    }
    
    canvas {
        width: 100%;
        height: 100%;
        object-fit: contain; 
    }

    .controls-hint {
        display: none; 
    }
    
    .mobile-controls-area {
        display: flex; /* 显示移动端控件 */
        margin-top: auto; 
        padding-bottom: 20px;
        height: 220px; 
        justify-content: flex-start;
    }
    
    /* 调整虚拟按键布局 */
    .virtual-controls {
        display: flex;
        transform: scale(0.9); /* 稍微缩小以适应 */
        margin-top: 0;
    }
}

/* ============ 狂暴模式样式 ============ */

/* 画布红色脉冲边框 */
.canvas-wrapper.rage-mode {
    border: 2px solid #ff2020;
    box-shadow: 0 0 30px rgba(255, 32, 32, 0.6),
                0 0 60px rgba(255, 32, 32, 0.3),
                0 0 20px rgba(255, 0, 0, 0.4) inset;
    animation: rage-border-pulse 0.8s ease-in-out infinite alternate;
}

@keyframes rage-border-pulse {
    0% {
        border-color: #ff2020;
        box-shadow: 0 0 20px rgba(255, 32, 32, 0.4),
                    0 0 40px rgba(255, 32, 32, 0.2),
                    0 0 15px rgba(255, 0, 0, 0.3) inset;
    }
    100% {
        border-color: #ff6600;
        box-shadow: 0 0 40px rgba(255, 102, 0, 0.7),
                    0 0 80px rgba(255, 32, 32, 0.4),
                    0 0 25px rgba(255, 60, 0, 0.5) inset;
    }
}

/* 狂暴模式指示器 */
.rage-indicator {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    pointer-events: none;
}

.rage-indicator.hidden {
    display: none !important;
}

.rage-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 32, 32, 0.85);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 0 8px rgba(255, 100, 0, 0.8);
    box-shadow: 0 0 15px rgba(255, 32, 32, 0.5);
}

.rage-icon {
    animation: rage-icon-shake 0.3s ease-in-out infinite alternate;
    display: inline-block;
}

@keyframes rage-icon-shake {
    0% { transform: rotate(-10deg) scale(1.1); }
    100% { transform: rotate(10deg) scale(1.2); }
}

.rage-label {
    letter-spacing: 2px;
    text-transform: uppercase;
}

.rage-stats {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: #ffcc00;
    font-weight: 600;
    text-shadow: 0 0 6px rgba(255, 200, 0, 0.6);
}

.rage-sep {
    opacity: 0.5;
}

/* 胜利画面 */
#victory-screen {
    background: rgba(0, 0, 0, 0.85);
    z-index: 30;
}

.victory-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.victory-title {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(45deg, #ffd700, #ff8c00, #ffd700);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: none;
    filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.6));
    animation: victory-glow 1.5s ease-in-out infinite alternate;
}

@keyframes victory-glow {
    0% { filter: drop-shadow(0 0 15px rgba(255, 215, 0, 0.4)); }
    100% { filter: drop-shadow(0 0 35px rgba(255, 215, 0, 0.9)); }
}

.victory-score {
    font-size: 1.3rem;
    color: #fff;
}

.victory-score span {
    color: #ffd700;
    font-weight: 700;
    font-size: 1.6rem;
}

/* 撒花画布 - 全屏覆盖在body层级 */
.confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 100;
    pointer-events: none;
}

.confetti-canvas.hidden {
    display: none !important;
}

/* 全局隐藏辅助类 */
.hidden {
    display: none !important;
}