/* css/style.css - 游戏样式表 */

/* 页面基础样式 */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #333;
    font-family: 'Press Start 2P', cursive; /* 使用像素风格字体，需要提前引入 */
    overflow: hidden; /* 防止出现滚动条 */
}

/* 游戏容器样式 */
#game-container {
    position: relative;
    border: 3px solid #000;
    box-shadow: 0 0 10px rgba(0,0,0,0.5); /* 添加阴影效果 */
    background-color: #70c5ce; /* 天蓝色背景，类似原版Flappy Bird */
    overflow: hidden; /* 确保超出容器的内容不可见 */
}

/* 游戏画布样式 */
#game-canvas {
    display: block; /* 消除画布底部的额外空间 */
    background-image: url('../assets/background.png');
    background-repeat: repeat-x; /* 背景图片水平重复 */
    background-size: contain; /* 背景图片自适应容器大小 */
}

/* 游戏界面层样式 */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.7); /* 半透明黑色遮罩 */
    color: white;
    padding: 20px;
    box-sizing: border-box;
}

/* 游戏标题容器样式 */
.game-title {
    margin-bottom: 15px; /* 进一步减小底部间距 */
    animation: float 2s ease-in-out infinite; /* 添加浮动动画 */
}

/* 游戏标题图片样式 */
#title-image {
    max-width: 180px; /* 增加最大宽度到180px */
    height: auto;
}

/* 标题浮动动画 */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* 游戏副标题样式 */
.screen h2 {
    font-size: 2em;
    margin-bottom: 15px;
    text-shadow: 1px 1px #000;
}

/* 游戏文本样式 */
.screen p {
    font-size: 1em;
    margin-bottom: 10px;
}

/* 游戏按钮通用样式 */
.screen button {
    font-family: inherit; /* 继承像素字体 */
    font-size: 1em;
    padding: 10px 20px;
    margin: 10px;
    border: 2px solid #fff;
    background-color: #555;
    color: #fff;
    cursor: pointer;
    box-shadow: 2px 2px #000;
    transition: background-color 0.2s, transform 0.1s;
}

/* 按钮悬停效果 */
.screen button:hover {
    background-color: #777;
}

/* 按钮点击效果 */
.screen button:active {
    transform: translateY(2px);
    box-shadow: none;
}

/* 难度选择界面样式 */
#difficulty-selection {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 12px 0;  /* 调整与标题的间距 */
}

#difficulty-selection p {
    margin-bottom: 6px;
    font-size: 0.75em;
    color: #fff;
    text-shadow: 1px 1px #000;
    animation: floatText 2s ease-in-out infinite;
}

@keyframes floatText {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

/* 难度选择按钮容器 */
.difficulty-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;  /* 保持按钮之间的间距 */
    justify-content: center;
    align-items: center;
    padding: 5px;
}

/* 难度选择按钮特殊样式 */
.difficulty-btn {
    width: 90px;
    height: 30px;
    padding: 0 !important;
    border: none !important;
    background-color: transparent !important;
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    box-shadow: none !important;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    position: relative;
    filter: brightness(0.85);
    transform-origin: center;
    animation: buttonFloat 3s ease-in-out infinite;
    animation-delay: var(--delay, 0s);
}

#easy-btn { 
    --delay: 0s; 
    background-image: url('../assets/btn_easy.png') !important;
}

#normal-btn { 
    --delay: 0.2s; 
    background-image: url('../assets/btn_normal.png') !important;
}

#hard-btn { 
    --delay: 0.4s; 
    background-image: url('../assets/btn_hard.png') !important;
}

@keyframes buttonFloat {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(3px); }
}

.difficulty-btn:hover {
    transform: scale(1.08) translateX(4px);
    filter: brightness(1.2);
    animation: none;
}

.difficulty-btn:active {
    transform: scale(0.95) translateX(-2px);
    filter: brightness(1);
}

/* 选中状态的按钮样式 */
.difficulty-btn.selected {
    filter: brightness(1.3);
    animation: selectedPulse 2s infinite;
}

@keyframes selectedPulse {
    0% { transform: scale(1.06) translateX(0); filter: brightness(1.3); }
    50% { transform: scale(1.1) translateX(3px); filter: brightness(1.4); }
    100% { transform: scale(1.06) translateX(0); filter: brightness(1.3); }
}

/* 开始游戏按钮样式 */
#start-game-btn {
    margin-top: 15px;
    width: 100px;  /* 与难度按钮相同宽度 */
    height: 35px;  /* 与难度按钮相同高度 */
    padding: 0 !important;
    border: none !important;
    background-color: transparent !important;
    background-image: url('../assets/btn_start.png') !important;
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    box-shadow: none !important;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    filter: brightness(0.85);
    animation: startBtnFloat 3s ease-in-out infinite;
}

@keyframes startBtnFloat {
    0%, 100% { 
        transform: translateY(0); 
        filter: brightness(0.85);
    }
    50% { 
        transform: translateY(-3px); 
        filter: brightness(1);
    }
}

#start-game-btn:hover {
    transform: scale(1.08) translateY(-2px);
    filter: brightness(1.2);
    animation: none;
}

#start-game-btn:active {
    transform: scale(0.95);
    filter: brightness(1);
}

#start-game-btn.disabled {
    filter: brightness(0.5);
    animation: none;
    pointer-events: none;
}

/* 游戏控制按钮样式 */
.game-button {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 8px 16px;
    background-color: rgba(255, 255, 255, 0.8);
    border: 2px solid #333;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    z-index: 1000; /* 确保按钮显示在最上层 */
    pointer-events: auto; /* 允许点击事件 */
}

/* 游戏按钮悬停效果 */
.game-button:hover {
    background-color: rgba(255, 255, 255, 1);
}

/* 游戏UI界面样式 */
#game-ui {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    color: white;
    font-size: 1.2em;
    text-shadow: 1px 1px #000;
    z-index: 100;
}

/* 道具状态显示样式 */
#powerup-status {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    color: white;
    text-shadow: 1px 1px #000;
}

/* 道具图标样式 */
.powerup-icon {
    width: 30px;
    height: 30px;
    position: absolute;
    z-index: 2;
}

/* 道具计时器样式 */
.powerup-timer {
    width: 50px;
    height: 50px;
    position: absolute;
    z-index: 1;
}

/* 隐藏元素样式 */
.hidden {
    display: none !important;
}

/* Add more specific styles for bird, pipes, coins, powerups later */

#over-image {
    max-width: 320px;
    width: 90%;
    height: auto;
    animation: float 1.5s ease-in-out infinite;
    margin: 0 auto 10px auto;
    display: block;
}

#score-display {
    margin: 15px 0;
    text-align: center;
}

#score-display p {
    font-size: 1em;
    margin-bottom: 8px;
    color: #fff;
    text-shadow: 1px 1px #000;
    animation: floatText 2s ease-in-out infinite;
}

#game-over-buttons {
    display: flex;
    flex-direction: row;
    gap: 40px;
    align-items: flex-start;
    justify-content: center;
    margin-top: 15px;
}

.game-over-btn-group {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#restart-game-btn.image-btn,
#main-menu-btn.image-btn {
    width: 70px;
    height: 48px;
    margin-bottom: 8px;
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    background-color: transparent !important;
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
    filter: brightness(0.85);
    animation: startBtnFloat 3s ease-in-out infinite;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    padding: 0 !important;
}

.btn-label {
    font-size: 1em;
    color: #e65c00;
    text-shadow: 1px 1px #fff, 2px 2px #000;
    font-family: inherit;
    letter-spacing: 2px;
    user-select: none;
}

#main-menu-btn.image-btn {
    background-image: url('../assets/home.png') !important;
}
#restart-game-btn.image-btn {
    background-image: url('../assets/restart.png') !important;
}