/* 重置与基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --cyber-blue: #00f3ff;
    --cyber-purple: #9d00ff;
    --cyber-pink: #ff00ff;
    --cyber-dark: #0a0a1a;
    --cyber-darker: #050510;
    --cyber-gray: #1a1a2e;
    --cyber-light: #e0e0ff;
    --grid-glow: rgba(0, 243, 255, 0.3);
    --tile-glow: rgba(157, 0, 255, 0.5);
}

body {
    font-family: 'Orbitron', sans-serif;
    background-color: var(--cyber-darker);
    color: var(--cyber-light);
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

/* 赛博朋克背景 */
.cyber-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: 
        radial-gradient(circle at 20% 30%, rgba(9, 0, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(255, 0, 221, 0.15) 0%, transparent 40%),
        linear-gradient(135deg, var(--cyber-darker) 0%, #0a0a2a 100%);
}

.grid-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 243, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 243, 255, 0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(30px, 30px); }
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particles::before, .particles::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--cyber-blue);
    border-radius: 50%;
    box-shadow: 
        20vw 10vh 0 0 var(--cyber-blue),
        40vw 60vh 0 0 var(--cyber-pink),
        60vw 30vh 0 0 var(--cyber-purple),
        80vw 80vh 0 0 var(--cyber-blue),
        10vw 70vh 0 0 var(--cyber-pink);
    animation: particlesMove 15s linear infinite;
}

.particles::after {
    width: 6px;
    height: 6px;
    animation-delay: -7.5s;
    box-shadow: 
        30vw 20vh 0 0 var(--cyber-pink),
        50vw 70vh 0 0 var(--cyber-blue),
        70vw 40vh 0 0 var(--cyber-purple),
        90vw 90vh 0 0 var(--cyber-pink),
        20vw 80vh 0 0 var(--cyber-blue);
}

@keyframes particlesMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-100px, -100px); }
}

/* 游戏包装器 */
.game-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* 头部样式 */
.cyber-header {
    padding: 1rem 0;
    margin-bottom: 1.5rem;
}

.header-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.cyber-title {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.cyber-glitch {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--cyber-blue);
    text-shadow: 
        0 0 10px var(--cyber-blue),
        0 0 20px var(--cyber-blue),
        0 0 30px var(--cyber-blue);
    position: relative;
    letter-spacing: 2px;
}

.cyber-glitch::before,
.cyber-glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.cyber-glitch::before {
    left: 2px;
    text-shadow: -2px 0 var(--cyber-pink);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

.cyber-glitch::after {
    left: -2px;
    text-shadow: -2px 0 var(--cyber-blue);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim2 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip: rect(31px, 9999px, 94px, 0); }
    5% { clip: rect(112px, 9999px, 76px, 0); }
    10% { clip: rect(85px, 9999px, 77px, 0); }
    15% { clip: rect(27px, 9999px, 97px, 0); }
    20% { clip: rect(64px, 9999px, 98px, 0); }
    25% { clip: rect(111px, 9999px, 114px, 0); }
    30% { clip: rect(25px, 9999px, 115px, 0); }
    35% { clip: rect(50px, 9999px, 120px, 0); }
    40% { clip: rect(67px, 9999px, 122px, 0); }
    45% { clip: rect(10px, 9999px, 92px, 0); }
    50% { clip: rect(85px, 9999px, 109px, 0); }
    55% { clip: rect(78px, 9999px, 103px, 0); }
    60% { clip: rect(46px, 9999px, 105px, 0); }
    65% { clip: rect(115px, 9999px, 120px, 0); }
    70% { clip: rect(1px, 9999px, 119px, 0); }
    75% { clip: rect(68px, 9999px, 102px, 0); }
    80% { clip: rect(105px, 9999px, 117px, 0); }
    85% { clip: rect(32px, 9999px, 67px, 0); }
    90% { clip: rect(65px, 9999px, 97px, 0); }
    95% { clip: rect(11px, 9999px, 7px, 0); }
    100% { clip: rect(99px, 9999px, 53px, 0); }
}

@keyframes glitch-anim2 {
    0% { clip: rect(65px, 9999px, 119px, 0); }
    5% { clip: rect(52px, 9999px, 99px, 0); }
    10% { clip: rect(79px, 9999px, 94px, 0); }
    15% { clip: rect(75px, 9999px, 87px, 0); }
    20% { clip: rect(67px, 9999px, 69px, 0); }
    25% { clip: rect(33px, 9999px, 84px, 0); }
    30% { clip: rect(39px, 9999px, 92px, 0); }
    35% { clip: rect(6px, 9999px, 54px, 0); }
    40% { clip: rect(99px, 9999px, 102px, 0); }
    45% { clip: rect(53px, 9999px, 79px, 0); }
    50% { clip: rect(34px, 9999px, 62px, 0); }
    55% { clip: rect(104px, 9999px, 108px, 0); }
    60% { clip: rect(103px, 9999px, 106px, 0); }
    65% { clip: rect(115px, 9999px, 74px, 0); }
    70% { clip: rect(23px, 9999px, 110px, 0); }
    75% { clip: rect(52px, 9999px, 56px, 0); }
    80% { clip: rect(11px, 9999px, 16px, 0); }
    85% { clip: rect(121px, 9999px, 19px, 0); }
    90% { clip: rect(18px, 9999px, 104px, 0); }
    95% { clip: rect(72px, 9999px, 62px, 0); }
    100% { clip: rect(7px, 9999px, 31px, 0); }
}

.cyber-subtitle {
    font-family: 'Share Tech Mono', monospace;
    color: var(--cyber-pink);
    font-size: 1.2rem;
    letter-spacing: 4px;
    margin-top: -0.5rem;
}

/* 分数显示 */
.cyber-score-display {
    display: flex;
    gap: 1rem;
}

.cyber-panel {
    background: rgba(26, 26, 46, 0.8);
    border: 1px solid var(--cyber-blue);
    border-radius: 8px;
    padding: 0.8rem 1.2rem;
    position: relative;
    box-shadow: 
        0 0 10px rgba(0, 243, 255, 0.3),
        inset 0 0 10px rgba(0, 243, 255, 0.1);
    backdrop-filter: blur(5px);
}

.cyber-panel::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(45deg, var(--cyber-blue), var(--cyber-purple), var(--cyber-pink), var(--cyber-blue));
    border-radius: 9px;
    z-index: -1;
    opacity: 0.5;
}

.score-container, .best-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
}

.score-label, .best-label {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.9rem;
    color: var(--cyber-blue);
    margin-bottom: 0.3rem;
    letter-spacing: 1px;
}

.score-value, .best-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--cyber-light);
    text-shadow: 0 0 8px var(--cyber-blue);
}

/* 赛博按钮 */
.cyber-button {
    background: rgba(26, 26, 46, 0.9);
    border: 1px solid var(--cyber-blue);
    color: var(--cyber-light);
    font-family: 'Orbitron', sans-serif;
    font-weight: 500;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    letter-spacing: 1px;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}

.cyber-button:hover {
    background: rgba(0, 243, 255, 0.1);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
    transform: translateY(-2px);
}

.cyber-button:active {
    transform: translateY(0);
}

.cyber-button i {
    color: var(--cyber-blue);
}

.cyber-button-glow {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 243, 255, 0.2), transparent);
    transition: left 0.7s ease;
}

.cyber-button:hover .cyber-button-glow {
    left: 100%;
}

/* 游戏主区域 */
.game-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    gap: 2rem;
    width: 100%;
}

.game-grid-container {
    position: relative;  /* 关键修复：使绝对定位的tile容器相对此容器定位 */
    width: 100%;
    max-width: 500px;
}

.grid-background {
    padding: 10px;
    width: 100%;
    aspect-ratio: 1 / 1;
    background: rgba(10, 10, 26, 0.3);  /* 可自定义背景 */
    border: 1px solid var(--cyber-blue);
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.2);
}

/* 网格单元格容器 - 使用Grid布局 */
.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 10px;
    width: 100%;
    height: 100%;
}

.grid-cell {
    background: rgba(10, 10, 26, 0.7);
    border-radius: 4px;
    border: 1px solid rgba(0, 243, 255, 0.2);
}

/* 方块容器 */
.tile-container {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    pointer-events: none;
}

/* 方块样式 */
.tile {
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 900;
    border-radius: 4px;
    transition: all 0.15s ease-in-out;
    z-index: 10;
    box-shadow: 
        0 0 15px var(--tile-glow),
        inset 0 0 10px rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

.tile::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    z-index: -1;
}

.tile-value {
    font-size: 1.8rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* 不同数值的方块颜色 - 赛博风格 */
.tile-2 { background: linear-gradient(135deg, #0a0a2a, #1a1a4a); color: #a0a0ff; box-shadow: 0 0 10px rgba(160, 160, 255, 0.5); }
.tile-4 { background: linear-gradient(135deg, #1a1a4a, #2a2a6a); color: #8080ff; box-shadow: 0 0 12px rgba(128, 128, 255, 0.6); }
.tile-8 { background: linear-gradient(135deg, #2a2a6a, #3a3a8a); color: #6060ff; box-shadow: 0 0 14px rgba(96, 96, 255, 0.7); }
.tile-16 { background: linear-gradient(135deg, #3a3a8a, #4a4aaa); color: #4040ff; box-shadow: 0 0 16px rgba(64, 64, 255, 0.8); }
.tile-32 { background: linear-gradient(135deg, #4a4aaa, #5a5aca); color: #00ccff; box-shadow: 0 0 18px rgba(0, 204, 255, 0.8); }
.tile-64 { background: linear-gradient(135deg, #5a5aca, #6a6aea); color: #00aaff; box-shadow: 0 0 20px rgba(0, 170, 255, 0.9); }
.tile-128 { background: linear-gradient(135deg, #6a6aea, #7a7aff); color: #0088ff; font-size: 1.6rem; box-shadow: 0 0 22px rgba(0, 136, 255, 1); }
.tile-256 { background: linear-gradient(135deg, #7a7aff, #8a8aff); color: #0066ff; font-size: 1.6rem; box-shadow: 0 0 24px rgba(0, 102, 255, 1); }
.tile-512 { background: linear-gradient(135deg, #8a8aff, #9a9aff); color: #0044ff; font-size: 1.6rem; box-shadow: 0 0 26px rgba(0, 68, 255, 1); }
.tile-1024 { background: linear-gradient(135deg, #9a9aff, #aaaaff); color: #00ffff; font-size: 1.4rem; box-shadow: 0 0 28px rgba(0, 255, 255, 1); }
.tile-2048 { background: linear-gradient(135deg, #aaaaff, #cc00ff); color: #ffffff; font-size: 1.4rem; box-shadow: 0 0 30px rgba(204, 0, 255, 1); animation: pulse 2s infinite; }

@keyframes pulse {
    0% { box-shadow: 0 0 30px rgba(204, 0, 255, 1); }
    50% { box-shadow: 0 0 40px rgba(204, 0, 255, 0.8); }
    100% { box-shadow: 0 0 30px rgba(204, 0, 255, 1); }
}

/* 合并动画（可选） */
.merge-animation {
    animation: mergeEffect 0.3s ease;
}

@keyframes mergeEffect {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* 游戏消息 */
.game-message {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    background: rgba(10, 10, 26, 0.95);
}

.message-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
    padding: 2rem;
}

.message-title {
    font-size: 2.5rem;
    color: var(--cyber-blue);
    text-shadow: 0 0 15px var(--cyber-blue);
}

.message-subtitle {
    font-family: 'Share Tech Mono', monospace;
    color: var(--cyber-light);
    font-size: 1.2rem;
    max-width: 80%;
}

.message-button {
    margin-top: 1rem;
    font-size: 1.1rem;
    padding: 1rem 2rem;
}

/* 游戏控制按钮 */
.game-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    max-width: 300px;
}

.controls-row {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.cyber-control-btn {
    background: rgba(26, 26, 46, 0.8);
    border: 1px solid var(--cyber-blue);
    color: var(--cyber-light);
    width: 70px;
    height: 70px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.cyber-control-btn:hover {
    background: rgba(0, 243, 255, 0.1);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
    transform: translateY(-3px);
}

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

.cyber-control-btn i {
    font-size: 1.5rem;
    color: var(--cyber-blue);
    margin-bottom: 0.3rem;
}

.cyber-control-btn span {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.8rem;
    color: var(--cyber-light);
}

/* 游戏说明 */
.game-instructions {
    width: 100%;
    max-width: 600px;
}

.instructions-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-family: 'Share Tech Mono', monospace;
}

.instruction-item i {
    color: var(--cyber-pink);
    font-size: 1.2rem;
}

.instruction-item strong {
    color: var(--cyber-blue);
    font-weight: 700;
}

/* 页脚 */
.cyber-footer {
    margin-top: 2rem;
    padding: 1rem 0;
    border-top: 1px solid rgba(0, 243, 255, 0.3);
}

.hacker-text {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.9rem;
    color: var(--cyber-blue);
    text-align: center;
    letter-spacing: 1px;
}

.cyber-text {
    animation: textFlicker 3s infinite;
}

@keyframes textFlicker {
    0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% { opacity: 1; }
    20%, 24%, 55% { opacity: 0.5; }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .game-wrapper { padding: 0.5rem; }
    .cyber-glitch { font-size: 2.5rem; }
    .cyber-subtitle { font-size: 1rem; }
    .header-content { flex-direction: column; align-items: center; gap: 1rem; }
    .cyber-score-display { width: 100%; justify-content: center; }
    .score-container, .best-container { min-width: 80px; }
    .score-value, .best-value { font-size: 1.7rem; }
    .game-grid-container { max-width: 90vw; }
    .tile-value { font-size: 1.5rem; }
    .tile-128 .tile-value, .tile-256 .tile-value, .tile-512 .tile-value { font-size: 1.3rem; }
    .tile-1024 .tile-value, .tile-2048 .tile-value { font-size: 1.1rem; }
    .cyber-control-btn { width: 60px; height: 60px; }
    .instructions-container { flex-direction: column; align-items: center; gap: 0.8rem; }
    .game-instructions,
.game-controls {
    display: none;
}
}

@media (max-width: 480px) {
    .cyber-glitch { font-size: 2rem; }
    .score-value, .best-value { font-size: 1.5rem; }
    .cyber-button { padding: 0.6rem 1rem; font-size: 0.9rem; }
    .tile-value { font-size: 1.2rem; }
    .cyber-control-btn { width: 50px; height: 50px; }
    .cyber-control-btn i { font-size: 1.2rem; }
    .cyber-control-btn span { font-size: 0.7rem; }
    .game-instructions,
.game-controls {
    display: none;
}
}

@media (min-width: 1200px) {
    .game-wrapper { max-width: 1400px; }
    .game-main { flex-direction: row; align-items: center; justify-content: space-around; }
    .game-controls { order: -1; max-width: 200px; }
    .game-instructions { max-width: 400px; }
}

@media (max-height: 700px) and (orientation: landscape) {
    .game-wrapper { padding: 0.5rem; }
    .cyber-header { margin-bottom: 0.5rem; }
    .cyber-glitch { font-size: 2rem; }
    .game-main { flex-direction: row; gap: 1rem; }
    .game-grid-container { max-width: 70vh; }
    .game-controls { max-width: 150px; }
    .cyber-control-btn { width: 50px; height: 50px; }
    .cyber-footer { margin-top: 0.5rem; padding: 0.5rem 0; }
}