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

:root {
    --bg-color: #0a0a0f;
    --primary: #00ffff;
    --secondary: #ff00ff;
    --accent: #00ff88;
    --warning: #ffaa00;
    --danger: #ff4444;
    --text: #ffffff;
    --text-dim: #888888;
    --glow-primary: 0 0 10px #00ffff, 0 0 20px #00ffff, 0 0 30px #00ffff;
    --glow-secondary: 0 0 10px #ff00ff, 0 0 20px #ff00ff;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg-color);
    color: var(--text);
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    user-select: none;
    -webkit-user-select: none;
}

.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    justify-content: center;
    align-items: center;
    background: var(--bg-color);
}

.screen.active {
    display: flex;
}

/* 主菜单 */
.menu-container {
    text-align: center;
    padding: 20px;
}

.game-title {
    font-size: 4em;
    font-weight: bold;
    letter-spacing: 0.2em;
    color: var(--primary);
    text-shadow: var(--glow-primary);
    margin-bottom: 10px;
    animation: titlePulse 2s ease-in-out infinite;
}

@keyframes titlePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.subtitle {
    font-size: 1.2em;
    color: var(--text-dim);
    margin-bottom: 30px;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 25px;
}

.menu-btn {
    padding: 15px 40px;
    font-size: 1.3em;
    border: 2px solid var(--primary);
    background: transparent;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.3s;
    text-shadow: 0 0 5px var(--primary);
}

.menu-btn:hover {
    background: var(--primary);
    color: var(--bg-color);
    box-shadow: var(--glow-primary);
}

.menu-btn.disabled {
    border-color: var(--text-dim);
    color: var(--text-dim);
    cursor: not-allowed;
    text-shadow: none;
}

.menu-btn.disabled:hover {
    background: transparent;
    color: var(--text-dim);
    box-shadow: none;
}

.settings-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.settings-row label {
    color: var(--text-dim);
}

.settings-row select {
    padding: 8px 15px;
    background: var(--bg-color);
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 1em;
}

.icon-btn {
    width: 45px;
    height: 45px;
    font-size: 1.3em;
    border: 1px solid var(--primary);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s;
}

.icon-btn:hover {
    background: rgba(0, 255, 255, 0.2);
}

.icon-btn.muted {
    border-color: var(--danger);
    color: var(--danger);
}

.tip {
    font-size: 0.9em;
    color: var(--accent);
}

/* 游戏界面 */
#game {
    flex-direction: column;
}

#game-hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    background: rgba(0, 0, 0, 0.7);
    border-bottom: 1px solid var(--primary);
    z-index: 10;
}

.hud-left, .hud-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.hud-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

#distance {
    font-size: 1.5em;
    color: var(--primary);
    text-shadow: 0 0 5px var(--primary);
}

#status-text {
    font-size: 1em;
    color: var(--accent);
}

#timer {
    font-size: 1.5em;
    font-family: monospace;
    color: var(--secondary);
    text-shadow: 0 0 5px var(--secondary);
}

#countdown {
    font-size: 3em;
    font-weight: bold;
    color: var(--warning);
    text-shadow: 0 0 20px var(--warning);
}

#game-instructions {
    position: absolute;
    top: 50px;
    left: 0;
    right: 0;
    height: 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    background: rgba(0, 0, 0, 0.5);
    font-size: 0.85em;
    color: var(--text-dim);
    z-index: 5;
}

#game-instructions .desktop-hint {
    color: var(--primary);
    opacity: 0.7;
}

#game-instructions .icon-btn.small {
    width: 30px;
    height: 24px;
    font-size: 0.9em;
    padding: 0;
    margin-left: 10px;
}

/* 调试面板 */
#debug-panel {
    position: absolute;
    top: 80px;
    right: 10px;
    width: 220px;
    background: rgba(0, 0, 0, 0.9);
    border: 1px solid var(--primary);
    padding: 10px;
    z-index: 100;
    font-size: 0.85em;
}

#debug-panel.hide {
    display: none;
}

.debug-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--primary);
    color: var(--primary);
}

.debug-header button {
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    font-size: 1.1em;
}

.debug-row {
    margin: 8px 0;
}

.debug-row label {
    display: block;
    margin-bottom: 3px;
    color: var(--text-dim);
}

.debug-row label span {
    color: var(--accent);
    font-weight: bold;
}

.debug-row input[type="range"] {
    width: 100%;
    height: 20px;
}

#debug-acc {
    color: var(--warning);
    font-family: monospace;
}

#debug-meter {
    position: relative;
    height: 20px;
    background: #222;
    border: 1px solid #444;
    margin: 5px 0;
}

#debug-meter-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #00ff88, #ffff00, #ff4444);
    transition: width 0.05s;
}

.meter-mark {
    position: absolute;
    top: 0;
    width: 2px;
    height: 100%;
    background: #fff;
    opacity: 0.7;
}

#debug-action {
    display: inline-block;
    padding: 2px 8px;
    font-weight: bold;
    font-size: 1.1em;
}

#debug-action.run { color: #00ff88; }
#debug-action.jump { color: #ffff00; }
#debug-action.fall { color: #ff4444; }

@media (max-width: 600px) {
    #game-instructions .desktop-hint {
        display: none;
    }
}

#track-canvas {
    position: absolute;
    top: 75px;
    left: 0;
    width: 100%;
    height: calc(100% - 105px);
    display: block;
}

#speed-bar-container {
    position: absolute;
    bottom: 10px;
    left: 20px;
    right: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--primary);
    display: flex;
    align-items: center;
}

#speed-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    box-shadow: 0 0 10px var(--primary);
    transition: width 0.1s;
}

#speed-label {
    position: absolute;
    right: 10px;
    font-size: 0.8em;
    color: var(--text-dim);
}

/* 结果界面 */
.result-container, .records-container, .pause-container {
    text-align: center;
    padding: 30px;
    border: 2px solid var(--primary);
    background: rgba(0, 0, 0, 0.9);
    min-width: 350px;
}

.result-container h2, .records-container h2, .pause-container h2 {
    font-size: 2em;
    color: var(--primary);
    margin-bottom: 20px;
    text-shadow: var(--glow-primary);
}

#result-ranking {
    font-size: 1.5em;
    margin: 20px 0;
}

#result-ranking .rank-1 { color: gold; }
#result-ranking .rank-2 { color: silver; }
#result-ranking .rank-3 { color: #cd7f32; }

#result-time {
    font-size: 2em;
    color: var(--secondary);
    margin: 15px 0;
    font-family: monospace;
}

#result-record {
    color: var(--accent);
    margin-bottom: 20px;
}

.result-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

/* 记录列表 */
#records-list {
    margin: 20px 0;
    text-align: left;
}

.record-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.3);
}

.record-rank {
    color: var(--primary);
    width: 30px;
}

.record-time {
    color: var(--secondary);
    font-family: monospace;
}

.record-date {
    color: var(--text-dim);
    font-size: 0.9em;
}

/* 横屏提示 */
#rotate-hint {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.rotate-content {
    text-align: center;
}

.phone-icon {
    font-size: 4em;
    animation: rotate 1.5s ease-in-out infinite;
}

@keyframes rotate {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(90deg); }
}

#rotate-hint p {
    margin-top: 20px;
    font-size: 1.2em;
    color: var(--primary);
}

/* 响应式 */
@media (orientation: portrait) {
    #rotate-hint {
        display: flex;
    }
    .screen.active {
        display: none;
    }
}

@media (max-height: 400px) {
    .game-title {
        font-size: 2.5em;
    }
    .menu-btn {
        padding: 10px 30px;
        font-size: 1.1em;
    }
    .menu-buttons {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
}