/* 全局样式与霓虹街机风主题 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --neon-cyan: #00ffff;
    --neon-pink: #ff00ff;
    --neon-purple: #8a2be2;
    --neon-yellow: #ffff00;
    --neon-green: #39ff14;
    --neon-orange: #ff6600;
    --bg-dark: #0a0a0a;
    --bg-darker: #050505;
}

body {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background: var(--bg-dark);
    color: white;
    min-height: 100vh;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 0, 255, 0.1) 0%, transparent 50%);
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 255, 0.03) 2px,
        rgba(0, 255, 255, 0.03) 4px
    );
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* 霓虹标题效果 */
.game-header {
    text-align: center;
    margin: 20px 0;
}

.neon-title {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.neon-text {
    font-size: 3rem;
    font-weight: bold;
    text-transform: uppercase;
    position: relative;
    display: inline-block;
    animation: flicker 3s infinite;
}

.neon-text:nth-child(1) {
    color: var(--neon-cyan);
    text-shadow:
        0 0 10px var(--neon-cyan),
        0 0 20px var(--neon-cyan),
        0 0 40px var(--neon-cyan);
}

.neon-text:nth-child(2) {
    color: var(--neon-pink);
    text-shadow:
        0 0 10px var(--neon-pink),
        0 0 20px var(--neon-pink),
        0 0 40px var(--neon-pink);
    animation-delay: 0.5s;
}

.neon-text:nth-child(3) {
    color: var(--neon-yellow);
    text-shadow:
        0 0 10px var(--neon-yellow),
        0 0 20px var(--neon-yellow),
        0 0 40px var(--neon-yellow);
    animation-delay: 1s;
}

@keyframes flicker {
    0%, 19%, 21%, 23%, 100% {
        opacity: 1;
    }
    20%, 22% {
        opacity: 0.5;
    }
}

/* 信息面板 */
.info-panel {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.info-item {
    text-align: center;
    padding: 15px 30px;
    border: 2px solid var(--neon-purple);
    border-radius: 10px;
    background: rgba(138, 43, 226, 0.1);
    box-shadow:
        0 0 20px rgba(138, 43, 226, 0.5),
        inset 0 0 20px rgba(138, 43, 226, 0.2);
    transition: all 0.3s ease;
}

.info-item:hover {
    transform: translateY(-5px);
    box-shadow:
        0 5px 30px rgba(138, 43, 226, 0.8),
        inset 0 0 20px rgba(138, 43, 226, 0.3);
}

.info-label {
    font-size: 1rem;
    color: var(--neon-cyan);
    margin-bottom: 5px;
    text-shadow: 0 0 10px var(--neon-cyan);
}

.info-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--neon-pink);
    text-shadow:
        0 0 10px var(--neon-pink),
        0 0 20px var(--neon-pink);
}

/* 游戏区域 */
.game-area {
    position: relative;
    width: 100%;
    height: 400px;
    margin: 40px 0;
    border: 3px solid var(--neon-cyan);
    border-radius: 15px;
    background:
        linear-gradient(180deg, rgba(0, 255, 255, 0.05) 0%, rgba(0, 0, 0, 0.8) 100%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(0,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    overflow: hidden;
    box-shadow:
        0 0 30px rgba(0, 255, 255, 0.6),
        inset 0 0 30px rgba(0, 255, 255, 0.1);
}

.beat-line {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent,
        var(--neon-yellow),
        var(--neon-pink),
        var(--neon-yellow),
        transparent
    );
    box-shadow:
        0 0 20px var(--neon-yellow),
        0 0 40px var(--neon-pink);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.6;
        transform: translateX(-50%) scaleY(1);
    }
    50% {
        opacity: 1;
        transform: translateX(-50%) scaleY(1.1);
    }
}

.notes-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* 音符样式 */
.note {
    position: absolute;
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    font-size: 2rem;
    font-weight: bold;
    border: 2px solid var(--neon-cyan);
    border-radius: 50%;
    background: rgba(0, 255, 255, 0.1);
    box-shadow:
        0 0 20px rgba(0, 255, 255, 0.8),
        inset 0 0 20px rgba(0, 255, 255, 0.3);
    color: var(--neon-cyan);
    text-shadow:
        0 0 10px var(--neon-cyan),
        0 0 20px var(--neon-cyan);
    left: 100%;
    transform: translateX(60px);
    animation: noteMove 1.5s linear;
    user-select: none;
}

@keyframes noteMove {
    0% {
        left: 100%;
        transform: translateX(60px);
    }
    100% {
        left: 50%;
        transform: translateX(-25px);
    }
}

.note.hit {
    animation: hitEffect 0.3s ease-out;
}

.note.perfect {
    border-color: var(--neon-yellow);
    background: rgba(255, 255, 0, 0.2);
    color: var(--neon-yellow);
    box-shadow:
        0 0 30px var(--neon-yellow),
        inset 0 0 30px rgba(255, 255, 0, 0.5);
}

.note.good {
    border-color: var(--neon-green);
    background: rgba(57, 255, 20, 0.2);
    color: var(--neon-green);
    box-shadow:
        0 0 30px var(--neon-green),
        inset 0 0 30px rgba(57, 255, 20, 0.5);
}

.note.miss {
    border-color: var(--neon-orange);
    background: rgba(255, 102, 0, 0.2);
    color: var(--neon-orange);
    box-shadow:
        0 0 30px var(--neon-orange),
        inset 0 0 30px rgba(255, 102, 0, 0.5);
}

@keyframes hitEffect {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* 判定显示 */
.judgement-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    font-weight: bold;
    text-align: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
}

.judgement-display.show {
    animation: judgementPop 0.6s ease-out;
}

.judgement-display.perfect {
    color: var(--neon-yellow);
    text-shadow:
        0 0 20px var(--neon-yellow),
        0 0 40px var(--neon-yellow),
        0 0 60px var(--neon-yellow);
}

.judgement-display.good {
    color: var(--neon-green);
    text-shadow:
        0 0 20px var(--neon-green),
        0 0 40px var(--neon-green),
        0 0 60px var(--neon-green);
}

.judgement-display.miss {
    color: var(--neon-orange);
    text-shadow:
        0 0 20px var(--neon-orange),
        0 0 40px var(--neon-orange),
        0 0 60px var(--neon-orange);
}

@keyframes judgementPop {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.5);
    }
    20% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.2);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1);
    }
}

/* 击中特效 */
.hit-effects {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hit-effect {
    position: absolute;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    animation: explode 0.5s ease-out forwards;
}

.hit-effect.perfect {
    border: 3px solid var(--neon-yellow);
    box-shadow:
        0 0 30px var(--neon-yellow),
        inset 0 0 30px rgba(255, 255, 0, 0.5);
}

.hit-effect.good {
    border: 3px solid var(--neon-green);
    box-shadow:
        0 0 30px var(--neon-green),
        inset 0 0 30px rgba(57, 255, 20, 0.5);
}

@keyframes explode {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(3);
        opacity: 0;
    }
}

/* 控制面板 */
.control-panel {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.control-btn {
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: bold;
    background: transparent;
    border: 2px solid var(--neon-pink);
    color: var(--neon-pink);
    cursor: pointer;
    border-radius: 50px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    box-shadow:
        0 0 20px rgba(255, 0, 255, 0.5);
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 0, 255, 0.3),
        transparent
    );
    transition: left 0.5s;
}

.control-btn:hover::before {
    left: 100%;
}

.control-btn:hover {
    background: rgba(255, 0, 255, 0.2);
    box-shadow:
        0 0 30px var(--neon-pink),
        0 0 60px rgba(255, 0, 255, 0.4);
    transform: translateY(-3px);
}

.control-btn:active {
    transform: translateY(0);
}

/* 难度选择 */
.difficulty-selector {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.diff-btn {
    padding: 12px 30px;
    font-size: 1rem;
    background: transparent;
    border: 2px solid var(--neon-purple);
    color: var(--neon-purple);
    cursor: pointer;
    border-radius: 25px;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(138, 43, 226, 0.5);
    font-weight: bold;
}

.diff-btn:hover {
    background: rgba(138, 43, 226, 0.2);
    box-shadow:
        0 0 25px var(--neon-purple),
        0 0 50px rgba(138, 43, 226, 0.3);
    transform: translateY(-2px);
}

.diff-btn.active {
    background: rgba(138, 43, 226, 0.4);
    box-shadow:
        0 0 30px var(--neon-purple),
        inset 0 0 20px rgba(138, 43, 226, 0.5);
}

/* 游戏说明 */
.instructions {
    max-width: 600px;
    margin: 40px auto;
    padding: 25px;
    border: 2px solid var(--neon-cyan);
    border-radius: 15px;
    background: rgba(0, 255, 255, 0.05);
    box-shadow:
        0 0 25px rgba(0, 255, 255, 0.3),
        inset 0 0 25px rgba(0, 255, 255, 0.05);
}

.instructions h3 {
    color: var(--neon-cyan);
    font-size: 1.5rem;
    margin-bottom: 15px;
    text-shadow: 0 0 15px var(--neon-cyan);
    text-align: center;
}

.instructions p {
    color: #fff;
    margin: 10px 0;
    line-height: 1.6;
    font-size: 1rem;
}

/* 虚拟键盘 */
.virtual-keyboard {
    display: none;
    margin: 30px 0;
    padding: 20px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 15px;
    border: 2px solid var(--neon-green);
    box-shadow:
        0 0 25px rgba(57, 255, 20, 0.3),
        inset 0 0 25px rgba(57, 255, 20, 0.05);
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 5px 0;
}

.key-btn {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    font-weight: bold;
    background: rgba(0, 255, 255, 0.1);
    border: 2px solid var(--neon-cyan);
    border-radius: 10px;
    color: var(--neon-cyan);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow:
        0 0 15px rgba(0, 255, 255, 0.5),
        inset 0 0 15px rgba(0, 255, 255, 0.2);
    text-shadow: 0 0 10px var(--neon-cyan);
}

.key-btn:hover {
    background: rgba(0, 255, 255, 0.3);
    box-shadow:
        0 0 25px var(--neon-cyan),
        inset 0 0 20px rgba(0, 255, 255, 0.4);
    transform: scale(1.1);
}

.key-btn:active {
    background: rgba(0, 255, 255, 0.5);
    transform: scale(0.95);
    box-shadow:
        0 0 40px var(--neon-cyan),
        inset 0 0 30px rgba(0, 255, 255, 0.6);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .neon-text {
        font-size: 1.8rem;
        gap: 15px;
    }

    .info-panel {
        gap: 15px;
    }

    .info-item {
        padding: 10px 20px;
    }

    .info-value {
        font-size: 1.5rem;
    }

    .game-area {
        height: 300px;
    }

    .control-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }

    .virtual-keyboard {
        display: block;
    }

    .instructions {
        font-size: 0.9rem;
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .neon-text {
        font-size: 1.2rem;
        gap: 10px;
    }

    .game-area {
        height: 250px;
    }

    .note {
        width: 40px;
        height: 40px;
        line-height: 40px;
        font-size: 1.5rem;
    }

    .key-btn {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
}

/* 隐藏桌面端的虚拟键盘 */
@media (min-width: 769px) {
    .virtual-keyboard {
        display: none !important;
    }
}