/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

/* 全站禁止选中/复制 */
* {
    -webkit-touch-callout: none;
}
html, body, div, span, p, a, button, h1, h2, h3, h4, h5, h6,
li, ol, ul, table, tr, td, th, label, kbd, select, option {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* 输入框允许正常选中/聚焦 */
input, textarea, [contenteditable] {
    user-select: text;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
}
button, .panel-header, .mod-option, .switch, .history-list li,
a, .control-button, .settings-btn, .help-button, .settings-button,
.help-close, .douyin-close, .clear-history-btn {
    -webkit-touch-callout: none;
    position: relative;
}

/* 透明遮罩层：阻止长按按钮文字被选中 */
button::after,
.control-button::after,
.settings-btn::after,
.panel-header::after,
.mod-option::after,
.help-close::after,
.douyin-close::after,
.clear-history-btn::after,
#startButton::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: transparent;
    -webkit-touch-callout: none;
    user-select: none;
    -webkit-user-select: none;
}

html, body {
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 10px;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    background: #0a0f1e;
    position: relative;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

/* ===== 动态星空背景 ===== */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse 80% 50% at 20% 10%, rgba(34, 197, 94, 0.18) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(168, 85, 247, 0.14) 0%, transparent 60%),
        radial-gradient(ellipse 50% 60% at 50% 40%, rgba(74, 222, 128, 0.1) 0%, transparent 50%),
        linear-gradient(180deg, #0a0f1e 0%, #111827 40%, #0f172a 70%, #0a0f1e 100%);
    animation: bgPulse 8s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { opacity: 0.8; }
    100% { opacity: 1; }
}

/* 星星粒子 */
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 25% 25%, rgba(255,255,255,0.5), transparent),
        radial-gradient(1.5px 1.5px at 40% 10%, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 55% 30%, rgba(255,255,255,0.4), transparent),
        radial-gradient(1.5px 1.5px at 70% 8%, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 85% 20%, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 15% 40%, rgba(255,255,255,0.3), transparent),
        radial-gradient(1.5px 1.5px at 60% 45%, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 90% 35%, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 30% 50%, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 75% 55%, rgba(255,255,255,0.3), transparent),
        radial-gradient(1.5px 1.5px at 45% 60%, rgba(255,255,255,0.6), transparent);
    animation: starTwinkle 3s ease-in-out infinite alternate;
}

@keyframes starTwinkle {
    0% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* ===== 布局 ===== */
.page-shell {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1060px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.game-shell {
    position: relative;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 14px;
    box-shadow:
        0 0 40px rgba(34, 197, 94, 0.15),
        0 0 80px rgba(168, 85, 247, 0.1),
        0 8px 32px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

/* 画布边框发光 */
.game-shell::before {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: 15px;
    padding: 1px;
    background: linear-gradient(
        135deg,
        rgba(34, 197, 94, 0.4),
        rgba(168, 85, 247, 0.25),
        rgba(74, 222, 128, 0.4),
        rgba(34, 197, 94, 0.2)
    );
    background-size: 300% 300%;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: 2;
    pointer-events: none;
    animation: borderGlow 4s ease-in-out infinite;
}

@keyframes borderGlow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ===== HUD ===== */
.hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    font-size: 14px;
    font-weight: 600;
    color: #e2e8f0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.9));
    border-bottom: 1px solid rgba(34, 197, 94, 0.2);
    position: relative;
    z-index: 3;
}

.hud-left,
.hud-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.hud-title {
    font-size: 17px;
    font-weight: 800;
    background: linear-gradient(135deg, #4ade80, #22c55e, #a855f7);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleShine 3s ease-in-out infinite;
    text-shadow: none;
    filter: drop-shadow(0 0 8px rgba(34, 197, 94, 0.4));
}

@keyframes titleShine {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.score-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: "JetBrains Mono", "Courier New", monospace;
    letter-spacing: 1px;
    flex: 1 1 auto;
    justify-content: center;
}

#score {
    color: #4ade80;
    text-shadow: 0 0 8px rgba(74, 222, 128, 0.4);
    transition: transform 0.15s ease;
    white-space: nowrap;
}

#score.pop {
    transform: scale(1.15);
    color: #a855f7;
    text-shadow: 0 0 16px rgba(168, 85, 247, 0.6);
}

#best {
    color: #94a3b8;
    white-space: nowrap;
}

/* HUD 内的帮助与设置按钮 */
.help-button,
.settings-button {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 16px;
    font-weight: 800;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-appearance: none;
    user-select: none;
    -webkit-user-select: none;
    flex-shrink: 0;
}

/* 帮助按钮 - 右侧，绿色 */
.help-button {
    border: 2px solid rgba(74, 222, 128, 0.4);
    background: rgba(34, 197, 94, 0.18);
    color: #bbf7d0;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.2);
}

.help-button:active {
    background: rgba(34, 197, 94, 0.4);
    border-color: rgba(134, 239, 172, 0.7);
    transform: scale(0.92);
}

/* 设置按钮 - 左侧，紫色 */
.settings-button {
    border: 2px solid rgba(168, 85, 247, 0.35);
    background: rgba(168, 85, 247, 0.12);
    color: #c084fc;
    box-shadow: 0 0 8px rgba(168, 85, 247, 0.15);
}

.settings-button:active {
    background: rgba(168, 85, 247, 0.3);
    border-color: rgba(192, 132, 252, 0.6);
    transform: rotate(60deg) scale(0.9);
}

/* ===== 设置面板 ===== */
.settings-modal {
    position: absolute;
    inset: 0;
    z-index: 25;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-modal.hidden {
    display: none;
}

.settings-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 30, 0.65);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.settings-card {
    position: relative;
    z-index: 1;
    width: 88%;
    max-width: 380px;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 18px;
    box-shadow:
        0 0 40px rgba(168, 85, 247, 0.15),
        0 16px 48px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.25s ease;
}

.settings-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px 14px;
    border-bottom: 1px solid rgba(168, 85, 247, 0.15);
}

.settings-card-title {
    font-size: 18px;
    font-weight: 800;
    color: #1e293b;
}

.settings-pause-badge {
    font-size: 12px;
    font-weight: 700;
    color: #7c3aed;
    background: rgba(168, 85, 247, 0.12);
    padding: 4px 10px;
    border-radius: 8px;
}

.settings-card-body {
    padding: 16px 22px 22px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.settings-section h3 {
    font-size: 15px;
    font-weight: 700;
    color: #7c3aed;
    margin-bottom: 10px;
}

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 14px;
    color: #475569;
    gap: 12px;
}

.settings-row + .settings-row {
    border-top: 1px solid #f1f5f9;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    max-width: 200px;
}

.volume-control input[type="range"] {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: #e2e8f0;
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #a855f7, #7c3aed);
    box-shadow: 0 2px 6px rgba(168, 85, 247, 0.3);
    cursor: pointer;
}

.volume-value {
    font-size: 13px;
    font-weight: 600;
    color: #64748b;
    min-width: 36px;
    text-align: right;
}

.settings-actions {
    display: flex;
    gap: 10px;
    padding-top: 4px;
}

.settings-btn {
    flex: 1;
    padding: 12px;
    min-height: 44px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    -webkit-appearance: none;
    user-select: none;
    -webkit-user-select: none;
}

.restart-btn {
    background: rgba(239, 68, 68, 0.08);
    color: #ef4444;
    border: 2px solid rgba(239, 68, 68, 0.2);
}

.restart-btn:active {
    background: rgba(239, 68, 68, 0.18);
    border-color: rgba(239, 68, 68, 0.4);
}

.resume-btn {
    background: linear-gradient(135deg, #22c55e, #15803d);
    color: #fff;
    box-shadow: 0 4px 14px rgba(21, 128, 61, 0.3);
}

.resume-btn:active {
    transform: scale(0.97);
    filter: brightness(0.95);
}

/* ===== 倒计时层 ===== */
.countdown-overlay {
    position: absolute;
    inset: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 30, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.countdown-overlay.hidden {
    display: none;
}

.countdown-text {
    font-size: 96px;
    font-weight: 900;
    color: #fff;
    text-shadow:
        0 0 40px rgba(34, 197, 94, 0.8),
        0 0 80px rgba(168, 85, 247, 0.5),
        0 8px 24px rgba(0, 0, 0, 0.4);
    animation: countBounce 0.6s ease;
}

@keyframes countBounce {
    0%   { transform: scale(0.3); opacity: 0; }
    50%  { transform: scale(1.15); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

/* ===== 帮助弹窗 ===== */
.help-modal {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
}

.help-modal.hidden {
    display: none;
}

.help-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 30, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.help-card {
    position: relative;
    z-index: 1;
    width: 88%;
    max-width: 340px;
    max-height: 45vh;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 14px;
    box-shadow:
        0 0 40px rgba(34, 197, 94, 0.2),
        0 16px 48px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from { transform: scale(0.9) translateY(10px); opacity: 0; }
    to   { transform: scale(1) translateY(0); opacity: 1; }
}

.help-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 2;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(34, 197, 94, 0.1);
}

.help-card-title {
    font-size: 14px;
    font-weight: 800;
    color: #1e293b;
}

.help-close {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 50%;
    background: rgba(34, 197, 94, 0.08);
    color: #64748b;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    -webkit-appearance: none;
    user-select: none;
    -webkit-user-select: none;
    flex-shrink: 0;
}

.help-close:active {
    background: rgba(34, 197, 94, 0.2);
    color: #1e293b;
}

.help-card-body {
    padding: 8px 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.help-section h3 {
    font-size: 12px;
    font-weight: 700;
    color: #16a34a;
    margin-bottom: 3px;
}

.help-section p {
    font-size: 11px;
    color: #475569;
    line-height: 1.5;
}

.help-section kbd {
    display: inline-block;
    padding: 1px 5px;
    border-radius: 3px;
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-size: 10px;
    color: #334155;
    font-weight: 600;
}

.help-warning {
    margin-top: 2px;
    padding: 8px 10px;
    background: linear-gradient(135deg, rgba(250, 204, 21, 0.12), rgba(251, 146, 60, 0.08));
    border: 1px solid rgba(250, 204, 21, 0.3);
    border-radius: 8px;
    font-size: 10px;
    color: #92400e;
    line-height: 1.5;
    text-align: center;
}

/* ===== 画布容器 ===== */
.canvas-stage {
    position: relative;
    width: 100%;
    line-height: 0;
}

/* ===== 画布 ===== */
#game {
    display: block;
    width: 100%;
    height: auto;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

/* ===== 遮罩层 ===== */
#overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    background: rgba(10, 15, 30, 0.7);
    backdrop-filter: blur(16px) saturate(120%);
    -webkit-backdrop-filter: blur(16px) saturate(120%);
    color: white;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    z-index: 2;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

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

#overlay h1 {
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(135deg, #4ade80, #22c55e, #a855f7);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleShine 3s ease-in-out infinite;
    filter: drop-shadow(0 0 12px rgba(74, 222, 128, 0.5));
}

#overlayText {
    font-size: 14px;
    line-height: 1.7;
    text-align: center;
    max-width: 90%;
    opacity: 0.9;
    color: #cbd5e1;
}

/* ===== 开始按钮 ===== */
#startButton {
    padding: 14px 40px;
    min-height: 48px;
    border: none;
    border-radius: 14px;
    font-size: 17px;
    font-weight: 700;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    position: relative;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    box-shadow:
        0 0 24px rgba(34, 197, 94, 0.5),
        0 4px 16px rgba(22, 163, 74, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    animation: btnPulse 2s ease-in-out infinite;
}

@keyframes btnPulse {
    0%, 100% { box-shadow: 0 0 24px rgba(34, 197, 94, 0.5), 0 4px 16px rgba(22, 163, 74, 0.3), inset 0 1px 0 rgba(255,255,255,0.2); }
    50% { box-shadow: 0 0 40px rgba(34, 197, 94, 0.7), 0 6px 24px rgba(22, 163, 74, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
}

#startButton:active {
    transform: scale(0.96);
    box-shadow: 0 0 16px rgba(34, 197, 94, 0.4), 0 2px 8px rgba(22, 163, 74, 0.2);
    animation: none;
}

/* ===== 移动端控制按钮 ===== */
.mobile-controls {
    display: flex;
    gap: 12px;
    padding: 0 2px;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.control-button {
    flex: 1;
    height: 64px;
    min-height: 48px;
    border: none;
    border-radius: 16px;
    font-size: 20px;
    font-weight: 700;
    color: white;
    cursor: pointer;
    user-select: none;
    -webkit-appearance: none;
    touch-action: manipulation;
    transition: background 0.05s;
}

.jump-button {
    background: linear-gradient(135deg, #22c55e, #15803d);
    box-shadow:
        0 0 20px rgba(34, 197, 94, 0.35),
        0 4px 14px rgba(21, 128, 61, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.duck-button {
    background: linear-gradient(135deg, #a855f7, #7c3aed);
    box-shadow:
        0 0 20px rgba(168, 85, 247, 0.35),
        0 4px 14px rgba(124, 58, 237, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.control-button:active {
    filter: brightness(0.85);
}

/* ===== 页脚 ===== */
.footer-link {
    text-align: center;
    font-size: 14px;
}

.footer-link a {
    text-decoration: none;
    font-weight: 800;
    background: linear-gradient(
        90deg,
        #ff0000, #ff8800, #ffdd00, #22c55e, #00bfff, #8b5cf6, #ff00ff
    );
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: rainbowScroll 2.5s linear infinite;
}

@keyframes rainbowScroll {
    0%   { background-position: 0% 50%; }
    100% { background-position: 300% 50%; }
}

/* ===== 修改器 & 得分记录面板 ===== */
.modifier-panel,
.score-history {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 14px;
    box-shadow:
        0 0 24px rgba(34, 197, 94, 0.08),
        0 4px 16px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    min-height: 40px;
    cursor: pointer;
    user-select: none;
    background: rgba(248, 250, 252, 0.6);
    border-bottom: 1px solid rgba(34, 197, 94, 0.1);
    transition: background 0.15s;
    -webkit-tap-highlight-color: transparent;
}

.panel-header:active {
    background: rgba(241, 245, 249, 0.8);
}

.panel-title {
    font-size: 14px;
    font-weight: 700;
    color: #1e293b;
    flex: 0 0 auto;
}

.toggle-arrow {
    font-size: 11px;
    color: #22c55e;
    transition: transform 0.2s;
    flex-shrink: 0;
}

.panel-body {
    padding: 8px 14px;
}

.panel-body.collapsed,
.panel-body.hidden {
    display: none;
}

/* 修改器行 */
.modifier-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
    flex-wrap: wrap;
    gap: 6px;
}

.modifier-row + .modifier-row {
    border-top: 1px solid rgba(34, 197, 94, 0.06);
}

.modifier-label {
    font-size: 12px;
    font-weight: 600;
    color: #475569;
    min-width: 36px;
}

.modifier-options {
    display: flex;
    gap: 4px;
}

.mod-option {
    padding: 4px 10px;
    min-height: 28px;
    min-width: 38px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    background: #fff;
    font-size: 11px;
    font-weight: 600;
    color: #64748b;
    cursor: pointer;
    transition: all 0.15s;
    -webkit-appearance: none;
}

.mod-option:active {
    border-color: #94a3b8;
    color: #334155;
    background: #f8fafc;
    transform: scale(0.96);
}

.mod-option.active {
    border-color: #22c55e;
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    color: #16a34a;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.15);
}

/* 修改器提示 */
.panel-hint {
    font-size: 10px;
    color: #94a3b8;
    font-weight: 400;
    flex: 1;
    text-align: right;
    margin-right: 6px;
}

/* ===== 得分记录面板 ===== */
.history-count {
    font-size: 12px;
    background: linear-gradient(135deg, #22c55e, #a855f7);
    color: #fff;
    padding: 2px 9px;
    border-radius: 10px;
    font-weight: 600;
}

.history-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.history-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 10px;
    background: rgba(248, 250, 252, 0.7);
    font-size: 14px;
    border: 1px solid rgba(34, 197, 94, 0.06);
    transition: background 0.15s;
}

.history-list li:first-child {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(168, 85, 247, 0.06));
    border-color: rgba(34, 197, 94, 0.15);
}

.history-list li:first-child .hist-rank {
    color: #22c55e;
}

.hist-rank {
    font-weight: 700;
    min-width: 26px;
    font-size: 13px;
    color: #16a34a;
}

.hist-score {
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-weight: 700;
    color: #1e293b;
    flex: 1;
    letter-spacing: 0.5px;
}

.hist-date {
    font-size: 11px;
    color: #94a3b8;
}

.hist-empty {
    color: #94a3b8;
    text-align: center;
    padding: 12px 0;
    background: none;
    border: none;
}

.clear-history-btn {
    margin-top: 10px;
    width: 100%;
    padding: 11px;
    min-height: 44px;
    border: 2px solid rgba(239, 68, 68, 0.2);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.5);
    color: #ef4444;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-appearance: none;
}

.clear-history-btn:active {
    background: rgba(254, 242, 242, 0.8);
    border-color: rgba(239, 68, 68, 0.4);
}

/* ===== 桌面端增强（>= 641px） ===== */
@media (min-width: 641px) {
    html, body {
        padding: 20px 16px;
    }

    .page-shell {
        gap: 18px;
    }

    .game-shell {
        border-radius: 22px;
    }

    .game-shell::before {
        border-radius: 23px;
    }

    .hud {
        padding: 16px 26px;
        font-size: 18px;
    }

    .hud-title {
        font-size: 20px;
    }

    .score-wrap {
        gap: 24px;
    }

    #overlay h1 {
        font-size: 36px;
    }

    #overlayText {
        font-size: 16px;
        max-width: 80%;
    }

    .help-button:hover {
        background: rgba(34, 197, 94, 0.35);
        border-color: rgba(134, 239, 172, 0.7);
    }

    .settings-button:hover {
        background: rgba(168, 85, 247, 0.25);
        border-color: rgba(192, 132, 252, 0.55);
    }

    #startButton:hover {
        transform: translateY(-2px);
        box-shadow:
            0 0 36px rgba(34, 197, 94, 0.6),
            0 8px 24px rgba(22, 163, 74, 0.4),
            inset 0 1px 0 rgba(255,255,255,0.3);
    }

    .control-button {
        height: 68px;
    }

    .modifier-panel,
    .score-history {
        border-radius: 16px;
    }

    .panel-header {
        padding: 14px 24px;
    }

    .panel-header:hover {
        background: rgba(241, 245, 249, 0.8);
    }

    .panel-body {
        padding: 16px 24px;
    }

    .mod-option {
        padding: 6px 16px;
        font-size: 14px;
    }

    .mod-option:hover {
        border-color: #22c55e;
        color: #16a34a;
        background: #f0fdf4;
        transform: translateY(-1px);
    }

    .restart-btn:hover {
        background: rgba(239, 68, 68, 0.18);
        border-color: rgba(239, 68, 68, 0.4);
    }

    .resume-btn:hover {
        transform: translateY(-1px);
        filter: brightness(1.1);
    }

    .clear-history-btn:hover {
        background: rgba(254, 242, 242, 0.8);
        border-color: rgba(239, 68, 68, 0.4);
    }

    .footer-link {
        font-size: 32px;
    }

    .footer-link a:hover {
        filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.6));
        animation-duration: 1s;
    }
}

/* ===== 移动端 HUD 两行布局 ===== */
@media (max-width: 640px) {
    html,
    body {
        width: 100%;
        max-width: 100%;
        align-items: stretch;
        justify-content: flex-start;
        overflow-x: hidden;
        background: #070b14;
    }

    html {
        padding: 0;
    }

    body {
        padding: 8px 12px 16px;
    }

    .page-shell {
        width: 100%;
        max-width: 430px;
        min-width: 0;
        margin: 0 auto;
        gap: 10px;
    }

    .game-shell,
    .modifier-panel,
    .friends-panel,
    .leaderboard-panel,
    .score-history {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        border-radius: 16px;
    }

    .hud {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
            "left right"
            "score score";
        gap: 8px 10px;
        padding: 9px 10px 10px;
        font-size: 12px;
        background: linear-gradient(180deg, rgba(16, 24, 39, 0.98), rgba(18, 28, 46, 0.95));
    }

    .hud-left {
        grid-area: left;
        min-width: 0;
        gap: 7px;
    }

    .hud-right {
        grid-area: right;
        min-width: 0;
        gap: 7px;
        justify-content: flex-end;
    }

    .hud-title {
        font-size: 14px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 110px;
    }

    .nickname-display {
        font-size: 11px;
        padding: 3px 9px;
        min-width: 44px;
        max-width: 92px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .score-wrap {
        grid-area: score;
        width: 100%;
        min-width: 0;
        gap: 10px;
        font-size: 13px;
        justify-content: space-between;
        padding: 6px 10px;
        border-radius: 12px;
        background: rgba(2, 6, 23, 0.26);
        border: 1px solid rgba(148, 163, 184, 0.12);
        letter-spacing: 0.5px;
    }

    #best {
        font-size: 11px;
    }

    .pk-button {
        width: auto;
        height: 30px;
        padding: 0 10px;
        font-size: 11px;
        border-radius: 14px;
        flex-shrink: 0;
    }

    .help-button,
    .settings-button {
        width: 30px;
        height: 30px;
        font-size: 14px;
        border-width: 1px;
    }

    .mobile-controls {
        width: 100%;
        gap: 12px;
        padding: 2px 2px 0;
    }

    .control-button {
        min-width: 0;
        height: 60px;
        border-radius: 16px;
        font-size: 18px;
        box-shadow: none;
    }

    .modifier-panel .panel-body {
        padding: 10px 14px 12px;
    }

    .modifier-row {
        display: grid;
        grid-template-columns: 44px minmax(0, 1fr);
        gap: 8px;
        padding: 6px 0;
    }

    .modifier-label {
        align-self: center;
        font-size: 13px;
        color: #cbd5e1;
    }

    .modifier-options {
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-end;
        gap: 6px;
        min-width: 0;
    }

    .mod-option {
        flex: 0 1 48px;
        min-width: 44px;
        min-height: 34px;
        padding: 5px 7px;
        border-radius: 10px;
        background: rgba(15, 23, 42, 0.9);
        border-color: rgba(148, 163, 184, 0.36);
        color: #cbd5e1;
        font-size: 12px;
    }

    .mod-option.active {
        background: rgba(22, 163, 74, 0.16);
        color: #86efac;
        border-color: #16a34a;
    }

    .panel-header {
        min-width: 0;
        min-height: 46px;
        padding: 11px 16px;
        gap: 9px;
        background: rgba(15, 23, 42, 0.92);
        border-bottom-color: rgba(148, 163, 184, 0.12);
    }

    .panel-title {
        min-width: 0;
        color: #e2e8f0;
        font-size: 15px;
    }

    .panel-hint {
        min-width: 0;
        text-align: right;
        color: #94a3b8;
        font-size: 10px;
        line-height: 1.2;
    }

    .history-count {
        min-width: 28px;
        text-align: center;
        padding: 3px 9px;
    }

    .panel-body {
        padding: 12px 14px 14px;
        background: rgba(8, 13, 24, 0.72);
    }

    .leaderboard-tabs {
        margin-bottom: 12px;
        border-radius: 12px;
        background: rgba(15, 23, 42, 0.75);
        border-color: rgba(148, 163, 184, 0.14);
    }

    .lb-tab {
        min-height: 40px;
        background: transparent;
        color: #94a3b8;
    }

    .lb-tab.active {
        background: rgba(124, 58, 237, 0.18);
        color: #e9d5ff;
    }

    .leaderboard-list,
    .history-list,
    .sidebar-friends-list {
        gap: 7px;
        overflow-y: auto;
        overscroll-behavior: contain;
        padding-right: 1px;
    }

    .leaderboard-list {
        max-height: min(52vh, 520px);
    }

    .history-list {
        max-height: min(48vh, 480px);
    }

    .sidebar-friends-list {
        max-height: min(36vh, 320px);
    }

    .lb-row,
    .history-list li,
    .sidebar-friend-row {
        min-height: 44px;
        padding: 10px 12px;
        border-radius: 12px;
        background: rgba(15, 23, 42, 0.9);
        border-color: rgba(148, 163, 184, 0.08);
    }

    .lb-row:first-child,
    .history-list li:first-child,
    .lb-is-me {
        background: rgba(20, 83, 45, 0.26);
        border-color: rgba(34, 197, 94, 0.16);
    }

    .lb-rank,
    .lb-nickname,
    .lb-score,
    .hist-score,
    .sidebar-friend-name {
        color: #e2e8f0;
    }

    .hist-rank {
        color: #22c55e;
    }

    .hist-date,
    .sidebar-friend-best {
        color: #94a3b8;
    }

    .refresh-btn {
        width: 30px;
        height: 30px;
        background: rgba(124, 58, 237, 0.16);
        border-color: rgba(168, 85, 247, 0.28);
        color: #c4b5fd;
    }

    .footer-link {
        font-size: 16px;
        padding: 2px 0;
    }

    .help-modal {
        position: fixed;
        inset: 0;
        padding: 12px;
        align-items: center;
        justify-content: center;
    }

    .help-card {
        width: min(90%, 320px);
        max-width: 100%;
        max-height: 40vh;
        border-radius: 12px;
        background: rgba(20, 22, 30, 0.98);
        border: 1px solid rgba(148, 163, 184, 0.14);
    }

    .help-card-header {
        position: sticky;
        top: 0;
        z-index: 2;
        padding: 8px 12px;
        background: rgba(20, 22, 30, 0.98);
        border-bottom-color: rgba(148, 163, 184, 0.14);
    }

    .help-card-title {
        color: #e2e8f0;
        font-size: 13px;
    }

    .help-close {
        width: 26px;
        height: 26px;
        background: rgba(34, 197, 94, 0.12);
        color: #cbd5e1;
        flex-shrink: 0;
        font-size: 16px;
    }

    .help-card-body {
        padding: 8px 12px 12px;
        gap: 8px;
    }

    .help-section h3 {
        color: #22c55e;
        font-size: 12px;
        margin-bottom: 3px;
    }

    .help-section p {
        color: #cbd5e1;
        font-size: 11px;
        line-height: 1.45;
    }

    .help-section kbd {
        background: rgba(15, 23, 42, 0.95);
        border-color: rgba(148, 163, 184, 0.35);
        color: #e2e8f0;
        font-size: 10px;
    }

    .help-warning {
        color: #fde68a;
        background: rgba(120, 53, 15, 0.24);
        border-color: rgba(251, 191, 36, 0.24);
        font-size: 10px;
        padding: 6px 8px;
    }
}

/* ===== 超小屏 (≤380px) 进一步缩小 ===== */
@media (max-width: 380px) {
    .hud {
        padding: 8px;
        gap: 7px;
    }

    .hud-left,
    .hud-right {
        gap: 5px;
    }

    .hud-title {
        font-size: 12px;
        max-width: 78px;
    }

    .nickname-display {
        font-size: 10px;
        padding: 2px 7px;
        min-width: 38px;
        max-width: 72px;
    }

    .score-wrap {
        gap: 6px;
        font-size: 11px;
        padding: 5px 8px;
    }

    #best {
        font-size: 10px;
    }

    .pk-button {
        height: 28px;
        padding: 0 8px;
        font-size: 10px;
    }

    .help-button,
    .settings-button {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .help-card {
        max-height: 35vh;
        max-width: 290px;
    }

    .help-card-header {
        padding: 6px 10px;
    }

    .help-card-title {
        font-size: 12px;
    }

    .help-card-body {
        padding: 6px 10px 10px;
        gap: 6px;
    }

    .help-section h3 {
        font-size: 11px;
    }

    .help-section p {
        font-size: 10px;
        line-height: 1.4;
    }

    .help-close {
        width: 24px;
        height: 24px;
        font-size: 14px;
    }
}

/* ===== 超小屏 (≤380px) 其他调整 ===== */
@media (max-width: 380px) {
    #overlay h1 {
        font-size: 22px;
    }

    #overlayText {
        font-size: 13px;
    }

    #startButton {
        padding: 12px 32px;
        font-size: 15px;
    }

    .control-button {
        height: 56px;
        font-size: 17px;
        border-radius: 14px;
    }

    .mobile-controls {
        gap: 10px;
    }

    .mod-option {
        padding: 6px 10px;
        font-size: 12px;
        min-width: 38px;
    }

    .modifier-label {
        font-size: 13px;
    }

    .panel-header {
        padding: 11px 14px;
    }

    .panel-body {
        padding: 10px 14px;
    }

    .panel-title {
        font-size: 14px;
    }

    .history-list li {
        padding: 7px 10px;
        font-size: 13px;
    }
    .countdown-text {
        font-size: 64px;
    }
}

/* ===== 移动端性能优化（<= 640px） ===== */
@media (max-width: 640px) {
    /* 关闭装饰性背景动画，减轻 GPU 负担 */
    body::before {
        animation: none;
    }
    body::after {
        animation: none;
    }

    /* 完全移除 backdrop-filter，这是移动端卡顿的最大元凶 */
    .game-shell,
    .settings-backdrop,
    .help-backdrop,
    .countdown-overlay,
    .douyin-backdrop,
    .settings-card,
    .help-card,
    #overlay,
    .modifier-panel,
    .score-history,
    .leaderboard-panel {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    /* 用不透明背景替代毛玻璃效果 */
    .game-shell {
        background: rgba(20, 22, 30, 0.97);
    }

    .settings-card,
    .help-card {
        background: rgba(20, 22, 30, 0.98);
    }

    #overlay {
        background: rgba(10, 13, 20, 0.92);
    }

    .modifier-panel,
    .score-history {
        background: rgba(20, 22, 30, 0.95);
    }

    /* 关闭画布边框发光动画 */
    .game-shell::before {
        animation: none;
    }

    /* 简化阴影 */
    .game-shell {
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    }

    /* 关闭脉冲动画 */
    #startButton {
        animation: none;
    }

    /* GPU 加速 */
    #game {
        transform: translateZ(0);
        will-change: transform;
    }

    .hud {
        transform: translateZ(0);
    }

    /* 减少不必要的重绘 */
    .game-shell {
        contain: layout style;
    }
}

/* ===== 抖音二维码弹窗 ===== */
.douyin-modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.douyin-modal.hidden {
    display: none;
}

.douyin-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 30, 0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.douyin-card {
    position: relative;
    z-index: 1;
    background: #fff;
    border-radius: 18px;
    padding: 16px;
    box-shadow:
        0 0 60px rgba(34, 197, 94, 0.25),
        0 0 100px rgba(168, 85, 247, 0.2),
        0 16px 48px rgba(0, 0, 0, 0.4);
    animation: modalIn 0.3s ease;
    max-width: 90vw;
    max-height: 90vh;
}

.douyin-card img {
    display: block;
    width: 260px;
    max-width: 70vw;
    height: auto;
    border-radius: 10px;
    user-select: auto;
    -webkit-user-select: auto;
    -webkit-touch-callout: default;
    pointer-events: auto;
}

.douyin-close {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, #22c55e, #a855f7);
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    transition: all 0.2s;
    -webkit-appearance: none;
    user-select: none;
    -webkit-user-select: none;
}

.douyin-close:active {
    transform: scale(0.9);
}

@media (min-width: 641px) {
    .douyin-card {
        padding: 20px;
    }
    .douyin-card img {
        width: 300px;
    }
    .douyin-close:hover {
        transform: scale(1.1);
    }
}

/* ===== 昵称显示 ===== */
.nickname-display {
    font-size: 12px;
    font-weight: 700;
    color: #facc15;
    background: rgba(250, 204, 21, 0.12);
    padding: 3px 12px;
    border-radius: 10px;
    border: 1px solid rgba(250, 204, 21, 0.25);
    opacity: 0;
    transform: translateX(-8px);
    transition: all 0.3s ease;
    white-space: nowrap;
    cursor: pointer;
    min-width: 48px;
    -webkit-appearance: none;
    font-family: inherit;
}

.nickname-display:hover {
    background: rgba(250, 204, 21, 0.2);
    border-color: rgba(250, 204, 21, 0.45);
}

.nickname-display.nickname-loaded {
    opacity: 1;
    transform: translateX(0);
}

/* ===== PK 按钮 ===== */
.pk-button {
    width: auto;
    height: 32px;
    padding: 0 10px;
    border: 2px solid rgba(168, 85, 247, 0.4);
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.18), rgba(139, 92, 246, 0.12));
    color: #c084fc;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-appearance: none;
    user-select: none;
    -webkit-user-select: none;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 12px rgba(168, 85, 247, 0.12);
}

.pk-button:active {
    background: rgba(168, 85, 247, 0.35);
    border-color: rgba(192, 132, 252, 0.6);
    transform: scale(0.94);
}

@media (min-width: 641px) {
    .pk-button {
        height: 34px;
        padding: 0 14px;
        font-size: 13px;
    }
    .pk-button:hover {
        background: rgba(168, 85, 247, 0.3);
        border-color: rgba(192, 132, 252, 0.55);
        box-shadow: 0 0 20px rgba(168, 85, 247, 0.25);
    }
}

/* ===== PK HUD 信息 ===== */
.pk-hud-info {
    font-size: 11px;
    color: #c084fc;
    background: rgba(168, 85, 247, 0.1);
    padding: 2px 8px;
    border-radius: 8px;
    white-space: nowrap;
}

.pk-hud-info.hidden {
    display: none;
}

/* ===== PK 匹配等待弹窗 ===== */
.pk-matchmaking-overlay {
    position: absolute;
    inset: 0;
    z-index: 28;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 30, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.pk-matchmaking-overlay.hidden {
    display: none;
}

.pk-matching-card {
    text-align: center;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.pk-matching-card p {
    font-size: 16px;
    font-weight: 600;
    color: #cbd5e1;
}

.pk-cancel-btn {
    padding: 10px 32px;
    min-height: 44px;
    border: 2px solid rgba(239, 68, 68, 0.35);
    border-radius: 12px;
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-appearance: none;
}

.pk-cancel-btn:active {
    background: rgba(239, 68, 68, 0.25);
    border-color: rgba(239, 68, 68, 0.55);
}

/* PK 旋转动画 */
.pk-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(168, 85, 247, 0.2);
    border-top-color: #a855f7;
    border-radius: 50%;
    animation: pkSpin 0.8s linear infinite;
}

@keyframes pkSpin {
    to { transform: rotate(360deg); }
}

/* ===== PK 找到对手弹窗 ===== */
.pk-match-found-overlay {
    position: absolute;
    inset: 0;
    z-index: 29;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 30, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.pk-match-found-overlay.hidden {
    display: none;
}

.pk-match-found-card {
    text-align: center;
    color: #fff;
}

.pk-match-found-card p {
    font-size: 24px;
    font-weight: 800;
    color: #4ade80;
    text-shadow: 0 0 20px rgba(74, 222, 128, 0.4);
    animation: modalIn 0.3s ease;
}

/* ===== 好友 PK 邀请弹窗 ===== */
.pk-invite-overlay {
    position: absolute;
    inset: 0;
    z-index: 31;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 30, 0.64);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.pk-invite-overlay.hidden {
    display: none;
}

.pk-invite-card {
    width: min(360px, calc(100% - 40px));
    padding: 24px;
    border: 1px solid rgba(148, 163, 184, 0.28);
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.96);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
    color: #fff;
    text-align: center;
    animation: modalIn 0.24s ease;
}

.pk-invite-card h2 {
    margin: 0 0 10px;
    font-size: 22px;
    line-height: 1.2;
}

.pk-invite-card p {
    margin: 0;
    color: #cbd5e1;
    font-size: 15px;
    line-height: 1.5;
}

.pk-invite-actions {
    display: flex;
    gap: 12px;
    margin-top: 22px;
}

.pk-invite-actions button {
    flex: 1;
    min-height: 44px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    -webkit-appearance: none;
}

.pk-invite-decline {
    border: 1px solid rgba(148, 163, 184, 0.35);
    background: rgba(15, 23, 42, 0.75);
    color: #cbd5e1;
}

.pk-invite-accept {
    border: 1px solid rgba(34, 197, 94, 0.45);
    background: #22c55e;
    color: #052e16;
}

/* ===== PK 等待对手弹窗 ===== */
.pk-waiting-overlay {
    position: absolute;
    inset: 0;
    z-index: 24;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 30, 0.55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.pk-waiting-overlay.hidden {
    display: none;
}

.pk-waiting-card {
    text-align: center;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.pk-waiting-icon {
    font-size: 48px;
    margin: 0;
}

.pk-waiting-card .pk-spinner {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

.pk-waiting-card p {
    font-size: 15px;
    font-weight: 600;
    color: #cbd5e1;
}

.pk-force-quit-btn {
    margin-top: 8px;
    padding: 10px 28px;
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.4);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.pk-force-quit-btn:hover {
    background: rgba(239, 68, 68, 0.3);
}

/* ===== PK 结果弹窗 ===== */
.pk-result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 6px 0;
}

.pk-result-score {
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-weight: 700;
    color: #22c55e;
    font-size: 18px;
}

.pk-result-dist {
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-size: 12px;
    color: #94a3b8;
}
.pk-result-overlay {
    position: absolute;
    inset: 0;
    z-index: 26;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 30, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.pk-result-overlay.hidden {
    display: none;
}

.pk-result-card {
    text-align: center;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 18px;
    padding: 32px 28px;
    box-shadow:
        0 0 40px rgba(168, 85, 247, 0.2),
        0 16px 48px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 280px;
    max-width: 90%;
}

.pk-result-card h2 {
    font-size: 28px;
    font-weight: 900;
}

.pk-result-card .pk-result-win {
    color: #16a34a;
    text-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
}

.pk-result-card .pk-result-lose {
    color: #dc2626;
    text-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.pk-result-card .pk-result-draw {
    color: #a855f7;
    text-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
}

.pk-result-card p {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
}

/* ===== 在线排行榜面板 ===== */
.leaderboard-panel {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 14px;
    box-shadow:
        0 0 24px rgba(168, 85, 247, 0.08),
        0 4px 16px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.leaderboard-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 10px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid rgba(168, 85, 247, 0.15);
}

.lb-tab {
    flex: 1;
    padding: 8px 0;
    min-height: 38px;
    border: none;
    background: rgba(248, 250, 252, 0.6);
    color: #64748b;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    -webkit-appearance: none;
}

.lb-tab + .lb-tab {
    border-left: 1px solid rgba(168, 85, 247, 0.1);
}

.lb-tab.active {
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.12), rgba(139, 92, 246, 0.08));
    color: #7c3aed;
    font-weight: 700;
}

.lb-tab:active {
    background: rgba(168, 85, 247, 0.15);
}

.leaderboard-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.lb-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 10px;
    background: rgba(248, 250, 252, 0.7);
    font-size: 14px;
    border: 1px solid rgba(168, 85, 247, 0.06);
    transition: background 0.15s;
}

.lb-row:first-child {
    background: linear-gradient(135deg, rgba(250, 204, 21, 0.08), rgba(168, 85, 247, 0.06));
    border-color: rgba(250, 204, 21, 0.15);
}

.lb-is-me {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(168, 85, 247, 0.06));
    border-color: rgba(34, 197, 94, 0.2);
}

.lb-rank {
    font-weight: 700;
    min-width: 30px;
    font-size: 13px;
    color: #1e293b;
}

.lb-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #94a3b8;
    flex-shrink: 0;
    transition: background 0.3s;
}

.lb-dot.online {
    background: #22c55e;
    box-shadow: 0 0 5px rgba(34, 197, 94, 0.4);
}

.lb-nickname {
    font-weight: 600;
    color: #334155;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lb-score {
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-weight: 700;
    color: #1e293b;
    letter-spacing: 0.5px;
}

.refresh-btn {
    width: 28px;
    height: 28px;
    border: 1px solid rgba(168, 85, 247, 0.2);
    border-radius: 50%;
    background: rgba(168, 85, 247, 0.08);
    color: #7c3aed;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    -webkit-appearance: none;
    flex-shrink: 0;
}

.refresh-btn:active {
    background: rgba(168, 85, 247, 0.2);
    transform: rotate(180deg);
}

@media (min-width: 641px) {
    .leaderboard-panel {
        border-radius: 16px;
    }
    .lb-tab:hover {
        background: rgba(168, 85, 247, 0.1);
    }
    .refresh-btn:hover {
        background: rgba(168, 85, 247, 0.18);
        transform: rotate(90deg);
    }
}

/* ===== 移动端优化 PK + 排行榜 ===== */
@media (max-width: 640px) {
    .pk-matchmaking-overlay,
    .pk-match-found-overlay,
    .pk-waiting-overlay,
    .pk-invite-overlay,
    .pk-result-overlay {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .pk-result-card {
        background: rgba(20, 22, 30, 0.98);
    }

    .leaderboard-panel {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(20, 22, 30, 0.95);
    }
}


/* ===== 排行榜玩家弹窗 ===== */
.player-popup {
    position: absolute;
    inset: 0;
    z-index: 31;
    display: flex;
    align-items: center;
    justify-content: center;
}

.player-popup.hidden {
    display: none;
}

.player-popup-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 30, 0.4);
}

.player-popup-card {
    position: relative;
    z-index: 1;
    width: 80%;
    max-width: 300px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    box-shadow: 0 0 30px rgba(168, 85, 247, 0.2), 0 12px 36px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.2s ease;
}

.player-popup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px 10px;
}

.popup-nickname {
    font-size: 18px;
    font-weight: 800;
    color: #1e293b;
}

.popup-close-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    font-size: 18px;
    color: #64748b;
    cursor: pointer;
    -webkit-appearance: none;
}

.player-popup-body {
    padding: 0 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 14px;
    color: #475569;
}

.popup-add-friend-btn {
    width: 100%;
    padding: 10px;
    min-height: 42px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
    -webkit-appearance: none;
}

.popup-add-friend-btn:active {
    transform: scale(0.97);
}

.popup-msg {
    font-size: 12px;
    font-weight: 600;
    text-align: center;
}

.popup-msg.success { color: #16a34a; }
.popup-msg.error { color: #ef4444; }
.popup-msg.hidden { display: none; }

/* 排行榜行可点击 */
.lb-row {
    cursor: pointer;
}

.lb-row:hover {
    background: rgba(59, 130, 246, 0.05);
}

/* ===== 好友侧边栏 ===== */
.friends-panel {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 14px;
    box-shadow: 0 0 24px rgba(59, 130, 246, 0.08), 0 4px 16px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.sidebar-friends-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 240px;
    overflow-y: auto;
}

.sidebar-friend-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(248, 250, 252, 0.6);
    border: 1px solid rgba(59, 130, 246, 0.06);
    transition: background 0.15s;
    cursor: pointer;
}

.sidebar-friend-row:hover,
.sidebar-friend-row:active {
    background: rgba(59, 130, 246, 0.06);
}

.sidebar-online-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sidebar-online-dot.online {
    background: #22c55e;
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.5);
}

.sidebar-online-dot.offline {
    background: #94a3b8;
}

.sidebar-friend-name {
    flex: 1;
    font-size: 13px;
    font-weight: 600;
    color: #1e293b;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-friend-best {
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-size: 11px;
    color: #94a3b8;
}

.sidebar-pk-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    -webkit-appearance: none;
    flex-shrink: 0;
    background: rgba(168, 85, 247, 0.1);
    color: #a855f7;
}

.sidebar-pk-btn:active {
    background: rgba(168, 85, 247, 0.25);
}

.sidebar-pk-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.sidebar-del-btn {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 50%;
    font-size: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-appearance: none;
    flex-shrink: 0;
    background: rgba(239, 68, 68, 0.08);
    color: #dc2626;
}

.sidebar-del-btn:active {
    background: rgba(239, 68, 68, 0.2);
}


/* 配置提示 */
.profile-hint {
    font-size: 11px;
    color: #94a3b8;
    font-style: italic;
}

/* 移动端适配 */
@media (max-width: 640px) {
    .friends-panel {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(20, 22, 30, 0.95);
    }
}

/* ===== 个人中心弹窗 ===== */
.profile-modal {
    position: absolute;
    inset: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-modal.hidden {
    display: none;
}

.profile-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 30, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.profile-card {
    position: relative;
    z-index: 1;
    width: 88%;
    max-width: 420px;
    max-height: 85%;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 18px;
    box-shadow: 0 0 40px rgba(168, 85, 247, 0.2), 0 16px 48px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.25s ease;
}

.profile-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px 14px;
    border-bottom: 1px solid rgba(168, 85, 247, 0.15);
}

.profile-card-title {
    font-size: 18px;
    font-weight: 800;
    color: #1e293b;
}

.profile-card-body {
    padding: 16px 22px 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.profile-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.profile-label {
    font-size: 13px;
    font-weight: 700;
    color: #7c3aed;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.profile-id-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-uid {
    flex: 1;
    padding: 8px 12px;
    background: #f1f5f9;
    border-radius: 8px;
    font-size: 11px;
    font-family: "JetBrains Mono", "Courier New", monospace;
    color: #475569;
    word-break: break-all;
    user-select: text;
    -webkit-user-select: text;
}

.profile-copy-btn {
    padding: 8px 12px;
    min-height: 36px;
    border: 2px solid rgba(168, 85, 247, 0.25);
    border-radius: 8px;
    background: rgba(168, 85, 247, 0.08);
    color: #7c3aed;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
    -webkit-appearance: none;
    flex-shrink: 0;
}

.profile-copy-btn:active {
    background: rgba(168, 85, 247, 0.2);
}

.profile-nick-row {
    display: flex;
    gap: 8px;
}

.profile-nick-input {
    flex: 1;
    padding: 10px 12px;
    min-height: 40px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 14px;
    color: #1e293b;
    outline: none;
    transition: border-color 0.2s;
    -webkit-appearance: none;
}

.profile-nick-input:focus {
    border-color: #a855f7;
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
}

.profile-save-btn {
    padding: 0 16px;
    min-height: 40px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #a855f7, #7c3aed);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
    -webkit-appearance: none;
    flex-shrink: 0;
}

.profile-save-btn:active {
    transform: scale(0.96);
}

.profile-best-score {
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-size: 24px;
    font-weight: 800;
    color: #22c55e;
}

.profile-divider {
    height: 1px;
    background: #e2e8f0;
    margin: 2px 0;
}

.profile-add-friend-row {
    display: flex;
    gap: 8px;
}

.profile-add-input {
    flex: 1;
    padding: 10px 12px;
    min-height: 40px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 13px;
    color: #1e293b;
    outline: none;
    transition: border-color 0.2s;
    -webkit-appearance: none;
    font-family: "JetBrains Mono", "Courier New", monospace;
}

.profile-add-input:focus {
    border-color: #22c55e;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

.profile-add-btn {
    padding: 0 14px;
    min-height: 40px;
    border: 2px solid #22c55e;
    border-radius: 10px;
    background: rgba(34, 197, 94, 0.08);
    color: #16a34a;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
    -webkit-appearance: none;
    flex-shrink: 0;
}

.profile-add-btn:active {
    background: rgba(34, 197, 94, 0.2);
}

.profile-add-msg {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 0;
}

.profile-add-msg.success {
    color: #16a34a;
}

.profile-add-msg.error {
    color: #ef4444;
}

.profile-add-msg.hidden {
    display: none;
}

.friend-count {
    font-size: 11px;
    color: #94a3b8;
    font-weight: 400;
}

.friends-list-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 200px;
    overflow-y: auto;
}

.friends-empty {
    font-size: 13px;
    color: #94a3b8;
    text-align: center;
    padding: 16px 0;
}

.friend-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(248, 250, 252, 0.8);
    border: 1px solid rgba(168, 85, 247, 0.08);
    transition: background 0.15s;
}

.friend-nickname {
    flex: 1;
    font-size: 14px;
    font-weight: 600;
    color: #1e293b;
}

.friend-best {
    font-family: "JetBrains Mono", "Courier New", monospace;
    font-size: 12px;
    font-weight: 600;
    color: #22c55e;
}

.friend-pk-btn {
    padding: 6px 12px;
    min-height: 32px;
    border: 2px solid rgba(168, 85, 247, 0.3);
    border-radius: 8px;
    background: rgba(168, 85, 247, 0.1);
    color: #7c3aed;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
    -webkit-appearance: none;
    flex-shrink: 0;
}

.friend-pk-btn:active {
    background: rgba(168, 85, 247, 0.25);
}

.friend-delete-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.08);
    color: #ef4444;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    -webkit-appearance: none;
    flex-shrink: 0;
}

.friend-delete-btn:active {
    background: rgba(239, 68, 68, 0.2);
}

/* 移动端兼容 */
@media (max-width: 640px) {
    .profile-modal {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
    .profile-card {
        background: rgba(20, 22, 30, 0.98);
    }
}

/* ===== iPhone 刘海屏 / 底部安全区域适配 ===== */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    html, body {
        padding-bottom: calc(10px + env(safe-area-inset-bottom));
    }
}

/* ===== 系统减少动画偏好 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    body::before,
    body::after {
        animation: none;
    }

    .game-shell::before {
        animation: none;
    }

    #startButton {
        animation: none;
    }

    .hud-title,
    #overlay h1 {
        animation: none;
        background: linear-gradient(135deg, #4ade80, #a855f7);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .footer-link a {
        animation: none;
        background: linear-gradient(90deg, #4ade80, #a855f7);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    #score.pop {
        transform: none;
    }
}