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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #1a2a3a;
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* === 通用样式 === */
.hidden {
    display: none !important;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
}

.screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* === 主菜单 === */
#main-menu {
    position: relative;
    flex-direction: column;
    overflow: hidden;
}

.menu-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.menu-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.35);
    z-index: 1;
}

.menu-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 20px;
    max-width: 480px;
    width: 100%;
}

.menu-content h1 {
    font-size: 2.5rem;
    color: white;
    text-shadow: 0 2px 8px rgba(0,0,0,0.4);
    margin-bottom: 4px;
}

.subtitle {
    font-size: 1rem;
    color: #b3e5fc;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.character-preview {
    margin-bottom: 16px;
}

#preview-canvas {
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    backdrop-filter: blur(4px);
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.btn {
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 700;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, filter 0.15s;
    letter-spacing: 1px;
    touch-action: manipulation;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

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

.btn-primary {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    box-shadow: 0 4px 12px rgba(255,107,53,0.4);
}

.btn-secondary {
    background: white;
    color: #1a5276;
    border: 2px solid #aed6f1;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.player-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    font-size: 0.9rem;
    color: white;
    background: rgba(255,255,255,0.2);
    padding: 10px 20px;
    border-radius: 24px;
    backdrop-filter: blur(4px);
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.track-info-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
    font-size: 0.85rem;
    color: white;
    background: rgba(255,255,255,0.25);
    padding: 6px 14px;
    border-radius: 24px;
    backdrop-filter: blur(4px);
}

.btn-small {
    padding: 4px 12px;
    font-size: 0.75rem;
    border-radius: 20px;
    background: rgba(255,255,255,0.6);
    color: #1a5276;
    border: none;
    font-weight: 700;
    cursor: pointer;
}

/* === 游戏容器 === */
#game-container {
    background: #fff;
}

#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: none;
}

/* === HUD === */
.hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 12px 16px;
    pointer-events: none;
    z-index: 10;
}

.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.hud-left, .hud-right {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hud-item {
    background: rgba(0,0,0,0.5);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

.hud-icon {
    margin-right: 4px;
}

.track-badge {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(231,76,60,0.4);
}

.hud-offroad {
    margin-top: 8px;
    background: rgba(192, 57, 43, 0.9);
    color: white;
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 700;
    text-align: center;
    animation: pulseWarning 1s infinite;
    backdrop-filter: blur(4px);
}

.hud-offroad span {
    display: block;
}

@keyframes pulseWarning {
    0%   { transform: scale(1); opacity: 1; }
    50%  { transform: scale(1.03); opacity: 0.85; }
    100% { transform: scale(1); opacity: 1; }
}

/* === 技能栏 === */
.skill-bar {
    position: absolute;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    pointer-events: auto;
    z-index: 20;
}

/* 圆形技能按钮 + SVG 环形冷却进度 */
.skill-circle-wrapper {
    position: relative;
    width: 72px;
    height: 72px;
}

.skill-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.skill-ring-bg {
    fill: none;
    stroke: rgba(255,255,255,0.3);
    stroke-width: 4;
}

.skill-ring-progress {
    fill: none;
    stroke: currentColor;
    stroke-width: 4;
    stroke-linecap: round;
    stroke-dasharray: 201; /* 2 * PI * 32 */
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 0.1s linear;
}

.skill-circle-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.6);
    background: rgba(0,0,0,0.6);
    color: white;
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.1s;
}

.skill-circle-btn:active {
    transform: translate(-50%, -50%) scale(0.92);
}

.skill-circle-btn:disabled {
    opacity: 0.8;
    cursor: not-allowed;
}

.skill-timer {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    text-shadow: 0 1px 3px rgba(0,0,0,0.8);
    pointer-events: none;
}

.skill-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.skill-label span:first-child {
    font-size: 0.85rem;
    color: white;
    font-weight: 700;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.skill-status {
    font-size: 0.75rem;
    color: #a0e0a0;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.skill-status.active {
    color: #ffd700;
    animation: pulseWarning 0.8s infinite;
}

.skill-status.cooldown {
    color: #ff8a80;
}

/* === 移动端控制 === */
.mobile-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 180px;
    z-index: 20;
    display: flex;
    pointer-events: none;
}

.touch-zone {
    flex: 1;
    pointer-events: auto;
}

.touch-left:active, .touch-right:active {
    background: rgba(255,255,255,0.08);
}

/* 虚拟摇杆样式 */
.joystick-zone {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 20;
    pointer-events: auto;
}

.joystick-base {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    border: 3px solid rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(6px);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.joystick-knob {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.85);
    box-shadow: 0 2px 10px rgba(0,0,0,0.25);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: none;
    pointer-events: none;
}

.joystick-base.active {
    background: rgba(255,255,255,0.22);
    border-color: rgba(255,255,255,0.55);
}

.joystick-knob.moving {
    background: rgba(255,255,255,0.95);
}

/* 加速按钮稍微上移，避免和摇杆在窄屏上打架 */
.btn-accelerate {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    font-size: 0.85rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(255,107,53,0.4);
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
}

.btn-accelerate:active {
    transform: scale(0.95);
    background: linear-gradient(135deg, #e55a2b, #e0851a);
}

.mobile-skill-wrapper {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: auto;
}

.btn-mobile-skill {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.8);
    background: rgba(0,0,0,0.6);
    color: white;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.desktop-hint {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    z-index: 10;
    pointer-events: none;
}

/* === 弹窗 === */
.modal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: white;
    border-radius: 20px;
    padding: 28px 24px;
    max-width: 380px;
    width: 90%;
    text-align: center;
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.85) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-content h2 {
    color: #1a5276;
    margin-bottom: 16px;
    font-size: 1.4rem;
}

.result-stats {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    background: #f4f6f7;
    border-radius: 10px;
    font-size: 0.95rem;
    color: #555;
}

.result-item strong {
    color: #1a5276;
}

.result-item.highlight {
    background: linear-gradient(135deg, #fdebd0, #f9e79f);
    font-weight: 700;
    display: none;
}

.result-item.highlight.show {
    display: flex;
}

.modal-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* === 商店 === */
.shop-content {
    max-width: 420px;
}

.shop-coins {
    font-size: 1rem;
    color: #c0392b;
    margin-bottom: 16px;
}

.shop-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.shop-tab {
    flex: 1;
    padding: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 2px solid #aed6f1;
    background: white;
    color: #1a5276;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.shop-tab.active {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(255,107,53,0.3);
}

.shop-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
    max-height: 50vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.shop-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px;
    background: #f8f9fa;
    border-radius: 14px;
    border: 2px solid transparent;
    transition: border-color 0.2s;
}

.shop-item.active-item {
    border-color: #27ae60;
    background: #eafaf1;
}

.shop-item-icon {
    width: 60px;
    height: 70px;
    flex-shrink: 0;
}

.shop-item-info {
    flex: 1;
    text-align: left;
}

.shop-item-info h3 {
    font-size: 1rem;
    color: #1a5276;
    margin-bottom: 2px;
}

.shop-item-info p {
    font-size: 0.8rem;
    color: #7f8c8d;
}

.shop-item-action {
    flex-shrink: 0;
}

.shop-item-action .btn {
    padding: 8px 18px;
    font-size: 0.85rem;
}

.owned-badge {
    background: #27ae60;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

.equipped-badge {
    background: #3498db;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

.locked-badge {
    background: #95a5a6;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

.track-item-difficulty {
    display: flex;
    gap: 3px;
    margin-top: 4px;
}

.difficulty-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ddd;
}

.difficulty-dot.filled {
    background: #e74c3c;
}

/* === 帮助 === */
.help-text {
    text-align: left;
    font-size: 0.9rem;
    line-height: 1.7;
    color: #444;
    margin-bottom: 16px;
}

.help-text p {
    margin-top: 10px;
    font-weight: 700;
    color: #1a5276;
}

.help-text ul {
    padding-left: 20px;
    margin-top: 6px;
}

.help-text li {
    margin-bottom: 4px;
}

kbd {
    background: #eee;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 0.85rem;
    font-family: monospace;
}

/* === 响应式 === */
@media (min-width: 768px) {
    .menu-content h1 {
        font-size: 3.2rem;
    }
}

@media (max-width: 767px) {
    .desktop-hint {
        display: none !important;
    }
}

/* === 卡包商店 === */
.gacha-content {
    max-width: 420px;
}

.gacha-packs {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 20px;
    max-height: 60vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-right: 4px;
}

.gacha-pack-item {
    background: #f8f9fa;
    border-radius: 16px;
    padding: 16px;
    border: 2px solid transparent;
    transition: border-color 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.gacha-pack-item:hover {
    border-color: #ff6b35;
    transform: translateY(-1px);
}

.gacha-pack-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.gacha-pack-lrg-icon {
    font-size: 2.6rem;
    flex-shrink: 0;
}

.gacha-pack-title h3 {
    font-size: 1.1rem;
    color: #1a5276;
    margin-bottom: 2px;
    text-align: left;
}

.gacha-pack-title p {
    font-size: 0.8rem;
    color: #7f8c8d;
    text-align: left;
}

.gacha-pack-stats {
    display: flex;
    gap: 12px;
    font-size: 0.8rem;
    color: #555;
    background: rgba(255,255,255,0.6);
    padding: 6px 10px;
    border-radius: 10px;
}

/* 抽卡动画 */
.gacha-anim-content {
    max-width: 360px;
    position: relative;
    overflow: visible;
}

.gacha-card {
    width: 200px;
    height: 260px;
    margin: 0 auto;
    perspective: 800px;
}

.gacha-card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.gacha-card.flipped .gacha-card-inner {
    transform: rotateY(180deg);
}

.gacha-card-front,
.gacha-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    border: 3px solid rgba(255,255,255,0.2);
}

.gacha-card-front {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.gacha-card-front .gacha-card-text {
    font-size: 4rem;
    font-weight: 700;
    color: rgba(255,255,255,0.3);
    margin-top: 8px;
}

.gacha-card-pack-icon {
    font-size: 3.5rem;
}

.gacha-card-back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
}

.gacha-reward-icon {
    font-size: 3.5rem;
    margin-bottom: 8px;
}

.gacha-reward-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.gacha-reward-desc {
    font-size: 0.85rem;
    opacity: 0.9;
    padding: 0 12px;
}

.gacha-sparkles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.sparkle {
    position: absolute;
    font-size: 1.2rem;
    opacity: 0;
    animation: sparkleAnim 1.2s ease-out forwards;
}

@keyframes sparkleAnim {
    0%   { opacity: 0; transform: scale(0.5) rotate(0deg); }
    30%  { opacity: 1; transform: scale(1.3) rotate(20deg); }
    100% { opacity: 0; transform: scale(0.8) rotate(45deg) translateY(-20px); }
}

/* 卡包标签页中的列表 */
.gacha-pack-icon {
    font-size: 2.4rem;
    flex-shrink: 0;
}