/* ============================================================
   TrainGun - 赛博朋克暗黑风主题
   ============================================================ */

/* ---------- CSS 变量 (Design Tokens) ---------- */
:root {
    --primary: #00fff0;
    --primary-rgb: 0, 255, 240;
    --secondary: #ff00ff;
    --secondary-rgb: 255, 0, 255;
    --accent: #ff6b35;
    --accent-rgb: 255, 107, 53;
    --bg: #0a0a1a;
    --bg-card: rgba(18, 18, 42, 0.75);
    --bg-panel: rgba(12, 12, 30, 0.92);
    --text: #e0e0f0;
    --text-dim: #7a7a9a;
    --text-bright: #ffffff;
    --success: #00ff88;
    --danger: #ff3366;
    --warning: #ffaa00;

    --glow-sm: 0 0 5px;
    --glow-md: 0 0 15px;
    --glow-lg: 0 0 30px;
    --glow-xl: 0 0 60px;

    --radius: 4px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s ease;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Rajdhani', 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    user-select: none;
    cursor: default;
}

/* 隐藏滚动条 */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(var(--primary-rgb), 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--primary-rgb), 0.5);
}

/* ---------- 动态背景 ---------- */
.bg-grid {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    z-index: 0;
    background:
        repeating-linear-gradient(transparent 0,
            transparent 49px,
            rgba(var(--primary-rgb), 0.025) 50px),
        repeating-linear-gradient(90deg,
            transparent 0,
            transparent 49px,
            rgba(var(--primary-rgb), 0.025) 50px);
    animation: gridMove 40s linear infinite;
    pointer-events: none;
}

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

    100% {
        transform: translate(50px, 50px);
    }
}

.bg-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(var(--primary-rgb), 0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(var(--secondary-rgb), 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(var(--accent-rgb), 0.03) 0%, transparent 50%);
    pointer-events: none;
}

/* ---------- App 容器 ---------- */
#app {
    position: relative;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ---------- 视图系统 ---------- */
.view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.view.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    animation: viewFadeIn 0.5s ease-out;
}

@keyframes viewFadeIn {
    0% {
        opacity: 0;
        transform: scale(1.02) translateY(10px);
    }

    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* ---------- 主菜单 ---------- */
.menu-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    max-width: 1000px;
    width: 100%;
}

/* Logo */
.logo-container {
    text-align: center;
    margin-bottom: 1rem;
}

.logo {
    font-family: 'Orbitron', monospace;
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    color: var(--primary);
    letter-spacing: 0.4em;
    text-shadow:
        var(--glow-sm) rgba(var(--primary-rgb), 0.8),
        var(--glow-md) rgba(var(--primary-rgb), 0.4),
        var(--glow-lg) rgba(var(--primary-rgb), 0.2);
    animation: logoFlicker 5s ease-in-out infinite;
    position: relative;
}

@keyframes logoFlicker {

    0%,
    100% {
        opacity: 1;
        text-shadow:
            var(--glow-sm) rgba(var(--primary-rgb), 0.8),
            var(--glow-md) rgba(var(--primary-rgb), 0.4),
            var(--glow-lg) rgba(var(--primary-rgb), 0.2);
    }

    5% {
        opacity: 0.85;
        text-shadow: none;
    }

    6% {
        opacity: 1;
    }

    41% {
        opacity: 1;
    }

    42% {
        opacity: 0.8;
        text-shadow: var(--glow-sm) rgba(var(--primary-rgb), 0.3);
    }

    43% {
        opacity: 1;
    }

    44% {
        opacity: 0.9;
    }

    45% {
        opacity: 1;
        text-shadow:
            var(--glow-sm) rgba(var(--primary-rgb), 0.8),
            var(--glow-md) rgba(var(--primary-rgb), 0.4),
            var(--glow-lg) rgba(var(--primary-rgb), 0.2);
    }
}

.subtitle {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 0.5em;
    margin-top: 0.5rem;
    text-shadow: var(--glow-sm) rgba(var(--secondary-rgb), 0.5);
}

.logo-line {
    width: 120px;
    height: 2px;
    margin: 1.2rem auto 0;
    background: linear-gradient(90deg,
            transparent,
            rgba(var(--primary-rgb), 0.6),
            rgba(var(--secondary-rgb), 0.6),
            transparent);
}

/* ---------- 模式卡片网格 ---------- */
.mode-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    width: 100%;
    max-width: 900px;
}

.mode-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid rgba(var(--primary-rgb), 0.3);
    border-radius: var(--radius);
    padding: 1.5rem 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
            transparent,
            rgba(var(--primary-rgb), 0.8),
            transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.mode-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
            transparent,
            rgba(var(--secondary-rgb), 0.8),
            transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.mode-card:hover {
    border-color: rgba(var(--primary-rgb), 0.6);
    transform: translateY(-6px);
    box-shadow:
        0 10px 40px rgba(var(--primary-rgb), 0.15),
        inset 0 0 30px rgba(var(--primary-rgb), 0.03);
}

.mode-card:hover::before,
.mode-card:hover::after {
    opacity: 1;
}

.mode-card:hover .card-glow {
    opacity: 1;
}

.mode-card:active {
    transform: translateY(-2px) scale(0.98);
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center,
            rgba(var(--primary-rgb), 0.08) 0%,
            transparent 50%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.card-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.mode-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 0.8rem;
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.3));
}

.mode-title {
    font-family: 'Orbitron', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.mode-desc {
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.4;
    margin-bottom: 0.8rem;
}

.mode-tag {
    font-family: 'Orbitron', monospace;
    font-size: 0.65rem;
    color: rgba(var(--primary-rgb), 0.5);
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

/* ---------- 底部按钮 ---------- */
.footer-btns {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

/* ---------- 通用按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.8rem;
    background: transparent;
    border: 1px solid rgba(var(--secondary-rgb), 0.5);
    color: var(--secondary);
    font-family: 'Orbitron', monospace;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(var(--secondary-rgb), 0.1),
            transparent);
    transition: left 0.5s ease;
}

.btn:hover {
    background: rgba(var(--secondary-rgb), 0.1);
    border-color: var(--secondary);
    box-shadow: var(--glow-md) rgba(var(--secondary-rgb), 0.3);
    color: var(--text-bright);
}

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

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

.btn-icon {
    font-size: 1rem;
}

.btn-back {
    border-color: rgba(var(--primary-rgb), 0.4);
    color: var(--primary);
    font-size: 0.75rem;
}

.btn-back:hover {
    background: rgba(var(--primary-rgb), 0.1);
    border-color: var(--primary);
    box-shadow: var(--glow-md) rgba(var(--primary-rgb), 0.3);
}

/* ---------- 面板视图（灵敏度设置 & 统计） ---------- */
.panel-container {
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.panel-title {
    font-family: 'Orbitron', monospace;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    text-shadow: var(--glow-sm) rgba(var(--primary-rgb), 0.5);
    letter-spacing: 0.1em;
}

.panel-body {
    background: var(--bg-panel);
    border: 1px solid rgba(var(--primary-rgb), 0.15);
    border-radius: var(--radius);
    padding: 2rem;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
}

.placeholder-text {
    color: var(--text-dim);
    text-align: center;
    font-size: 1.1rem;
    padding: 3rem 0;
}

/* ---------- 训练场景视图 ---------- */
#game-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    background: #0a0a1a;
    cursor: none;
}

/* HUD 信息层 */
.hud {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    display: none;
}

.view.active .hud {
    display: block;
}

.hud-top-left {
    position: absolute;
    top: 20px;
    left: 30px;
}

.hud-top-center {
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
}

.hud-top-right {
    position: absolute;
    top: 20px;
    right: 30px;
}

.hud-bottom {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.hud-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0, 0, 0, 0.5);
    padding: 0.5rem 1.2rem;
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    border-radius: var(--radius);
    backdrop-filter: blur(5px);
}

.hud-label {
    font-family: 'Orbitron', monospace;
    font-size: 0.6rem;
    color: var(--text-dim);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.hud-value {
    font-family: 'Orbitron', monospace;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    text-shadow: var(--glow-sm) rgba(var(--primary-rgb), 0.5);
}

.hud-timer {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-bright);
    text-shadow:
        var(--glow-sm) rgba(var(--primary-rgb), 0.5),
        var(--glow-md) rgba(var(--primary-rgb), 0.2);
    background: rgba(0, 0, 0, 0.5);
    padding: 0.3rem 1.5rem;
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    border-radius: var(--radius);
}

/* 训练覆盖层（倒计时/暂停/结果） */
.training-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

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

.overlay-content {
    text-align: center;
    animation: viewFadeIn 0.3s ease-out;
}

.overlay-title {
    font-family: 'Orbitron', monospace;
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary);
    text-shadow:
        var(--glow-md) rgba(var(--primary-rgb), 0.6),
        var(--glow-lg) rgba(var(--primary-rgb), 0.3);
    margin-bottom: 1rem;
}

.overlay-text {
    font-size: 1.2rem;
    color: var(--text-dim);
    margin-bottom: 2rem;
}

/* ---------- 难度选择弹窗 ---------- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    z-index: 1;
    background: var(--bg-panel);
    border: 1px solid rgba(var(--primary-rgb), 0.3);
    border-radius: var(--radius);
    padding: 2.5rem;
    text-align: center;
    min-width: 400px;
    animation: viewFadeIn 0.3s ease-out;
    backdrop-filter: blur(20px);
}

.modal-title {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-shadow: var(--glow-sm) rgba(var(--primary-rgb), 0.5);
    margin-bottom: 0.3rem;
    letter-spacing: 0.1em;
}

.modal-subtitle {
    color: var(--text-dim);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.difficulty-options {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.btn-difficulty {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    padding: 1rem 1.5rem;
    background: rgba(var(--primary-rgb), 0.03);
    border: 1px solid rgba(var(--primary-rgb), 0.15);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    color: var(--text);
    font-family: 'Rajdhani', sans-serif;
}

.btn-difficulty:hover {
    background: rgba(var(--primary-rgb), 0.1);
    border-color: rgba(var(--primary-rgb), 0.5);
    transform: translateX(5px);
    box-shadow: 0 0 20px rgba(var(--primary-rgb), 0.1);
}

.btn-difficulty:active {
    transform: translateX(3px) scale(0.98);
}

.diff-icon {
    font-size: 1.5rem;
}

.diff-name {
    font-family: 'Orbitron', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-bright);
    letter-spacing: 0.1em;
    flex: 1;
}

.diff-desc {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* ---------- 通知系统 ---------- */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.notification {
    padding: 0.8rem 1.5rem;
    background: var(--bg-panel);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--text);
    backdrop-filter: blur(10px);
    animation: notifSlideIn 0.3s ease-out;
    pointer-events: auto;
}

.notification.success {
    border-left-color: var(--success);
}

.notification.error {
    border-left-color: var(--danger);
}

.notification.warning {
    border-left-color: var(--warning);
}

@keyframes notifSlideIn {
    0% {
        opacity: 0;
        transform: translateX(50px);
    }

    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes notifSlideOut {
    0% {
        opacity: 1;
        transform: translateX(0);
    }

    100% {
        opacity: 0;
        transform: translateX(50px);
    }
}

/* ---------- 输入框样式 ---------- */
.input-field {
    width: 100%;
    padding: 0.7rem 1rem;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    border-radius: var(--radius);
    color: var(--text);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

.input-field:focus {
    border-color: var(--primary);
    box-shadow: var(--glow-sm) rgba(var(--primary-rgb), 0.3);
}

.input-field::placeholder {
    color: var(--text-dim);
}

/* 下拉框 */
.select-field {
    width: 100%;
    padding: 0.7rem 1rem;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    border-radius: var(--radius);
    color: var(--text);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.select-field:focus {
    border-color: var(--primary);
    box-shadow: var(--glow-sm) rgba(var(--primary-rgb), 0.3);
}

/* ---------- 表单组 ---------- */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.form-label {
    font-family: 'Orbitron', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

/* DPI 快捷按钮 */
.dpi-presets {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.dpi-btn {
    padding: 0.3rem 0.8rem;
    background: transparent;
    border: 1px solid rgba(var(--primary-rgb), 0.2);
    color: var(--text-dim);
    font-family: 'Orbitron', monospace;
    font-size: 0.7rem;
    cursor: pointer;
    transition: var(--transition-fast);
    border-radius: 2px;
}

.dpi-btn:hover,
.dpi-btn.active {
    background: rgba(var(--primary-rgb), 0.15);
    border-color: var(--primary);
    color: var(--primary);
}

/* ---------- 统计面板样式 ---------- */
.stats-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(var(--primary-rgb), 0.15);
}

.stats-tab {
    padding: 0.6rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-dim);
    font-family: 'Orbitron', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: var(--transition-fast);
}

.stats-tab:hover {
    color: var(--text);
}

.stats-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.stats-best {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: rgba(var(--primary-rgb), 0.03);
    border: 1px solid rgba(var(--primary-rgb), 0.1);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
}

.stat-card-label {
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 0.3rem;
}

.stat-card-value {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-shadow: var(--glow-sm) rgba(var(--primary-rgb), 0.3);
}

/* 折线图容器 */
.chart-container {
    width: 100%;
    height: 200px;
    margin-top: 1rem;
    border: 1px solid rgba(var(--primary-rgb), 0.1);
    border-radius: var(--radius);
    overflow: hidden;
}

/* ---------- 训练结果页 ---------- */
.result-container {
    text-align: center;
    max-width: 500px;
    width: 90%;
}

.result-score {
    font-family: 'Orbitron', monospace;
    font-size: 5rem;
    font-weight: 900;
    color: var(--primary);
    text-shadow:
        var(--glow-md) rgba(var(--primary-rgb), 0.6),
        var(--glow-lg) rgba(var(--primary-rgb), 0.3);
    margin-bottom: 0.5rem;
}

.result-label {
    font-family: 'Orbitron', monospace;
    font-size: 0.9rem;
    color: var(--text-dim);
    letter-spacing: 0.3em;
    margin-bottom: 2rem;
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.result-stat {
    background: rgba(var(--primary-rgb), 0.03);
    border: 1px solid rgba(var(--primary-rgb), 0.1);
    border-radius: var(--radius);
    padding: 1rem;
}

.result-stat-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.result-stat-value {
    font-family: 'Orbitron', monospace;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-bright);
}

.result-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.new-record {
    font-family: 'Orbitron', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--warning);
    text-shadow: var(--glow-md) rgba(255, 170, 0, 0.5);
    animation: pulse 1s ease-in-out infinite;
    margin-bottom: 1rem;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

/* ---------- 倒计时 ---------- */
.countdown-number {
    font-family: 'Orbitron', monospace;
    font-size: 8rem;
    font-weight: 900;
    color: var(--primary);
    text-shadow:
        var(--glow-lg) rgba(var(--primary-rgb), 0.6),
        var(--glow-xl) rgba(var(--primary-rgb), 0.3);
    animation: countdownPop 0.5s ease-out;
}

@keyframes countdownPop {
    0% {
        transform: scale(2);
        opacity: 0;
    }

    50% {
        transform: scale(0.9);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    .mode-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }

    .logo {
        font-size: 2.5rem;
        letter-spacing: 0.2em;
    }

    .subtitle {
        font-size: 0.8rem;
        letter-spacing: 0.3em;
    }

    .footer-btns {
        flex-direction: column;
        gap: 0.8rem;
    }

    .modal-content {
        min-width: auto;
        margin: 1rem;
    }

    .result-stats {
        grid-template-columns: 1fr;
    }

    .stats-best {
        grid-template-columns: 1fr;
    }
}