* { margin: 0; padding: 0; box-sizing: border-box; -webkit-user-select: none; user-select: none;}
body {
    font-family: 'Noto Sans SC', sans-serif; 
    background-color: #fce4ec;
    color: #333;
    position: relative;
    overflow: hidden;
    -webkit-user-select: none; /* Safari */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
    user-select: none; /* Chrome, Opera, and others */
}
.body-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: url('../img/bg.webp') no-repeat center center / cover;
    filter: blur(5px);
}
#app {
    min-height: 100vh;
    margin: 0;
    padding: 6px 20px;
}

[v-cloak] {
    display: none !important;
}
.text-center { text-align: center; }
.text-right { text-align: right; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-1 { flex: 1; width: 0; }
.flex-col { display: flex; flex-direction: column; }
.ai-c { align-items: center; }
.jc-sb{ justify-content: space-between; }
.jc-c { justify-content: center; }
.jc-sa { justify-content: space-around; }
.p10{padding:10px;}.p15{padding:15px;}.p20{padding:20px;}
.m10{margin:10px;}.m15{margin:15px;}.m20{margin:20px;}
.mb10{margin-bottom:10px;}.mb15{margin-bottom:15px;}.mb20{margin-bottom:20px;}
.mr10{margin-right:10px;}.mr15{margin-right:15px;}.mr20{margin-right:20px;}
.mx10{margin:0 10px;}.mx15{margin:0 15px;}.mx20{margin:0 20px;}
.my10{margin:10px 0;}.my15{margin:15px 0;}.my20{margin:20px 0;}
.w100{width:100%;}
.h100{height:100%;}

.container {
    background-color: #ffffff;
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    padding: 30px;
    text-align: center;
    width: 100%;
    /* max-width: 800px; */
    max-width: max(80%, 800px);
    position: relative;
    overflow: hidden;
}

.mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9; /* Ensure it's above other content */
}
.audio-img {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 8;
    width: 30px;
    cursor: pointer;
}
.audio-img.off {
    opacity: .3;
}
.go-top {
    position: absolute;
    bottom: 10px;
    right: 10px;
    z-index: 2;
    padding: 4px;
}


.container::before, .container::after {
    content: '';
    position: absolute;
    background-color: #ffdab9; /* PeachPuff for cute elements */
    border-radius: 50%;
    opacity: 0.7;
}

.container::before {
    width: 80px;
    height: 80px;
    top: -40px;
    left: -40px;
}

.container::after {
    width: 120px;
    height: 120px;
    bottom: -60px;
    right: -60px;
}


header h1 {
    color: #ff6f91; 
    font-size: 3em;
    margin-bottom: 30px;
}
header h1:before, header h1:after {
    content: ''; 
    margin: 0 10px;
    background: url(../img/nezha1.webp) no-repeat center center;
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-size: contain;
    position: relative;
    top: 4px;
}

header p {
    color: #888;
    font-size: 1.2em;
    margin-bottom: 30px;
}


.hanzi-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 15px;
    margin-top: 20px;
    height: 70vh;
    overflow-y: auto;
    padding: 10px;
}

.hanzi-item {
    background-color: #ffe4e1; /* MistyRose */
    border: 3px solid #ff6347;
    border-radius: 15px;
    padding: 15px;
    font-size: 3em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100px; /* fixed height for hanzi items */
    color: #4CAF50;
}
.hanzi-item.on {
    background: #ffca87;
}

.hanzi-item.locked {
    background-color: rgb(252 228 236); /* LightGray */
    border-color: #fce4ec;
    cursor: not-allowed;
    padding-left: 0px;
    color: #909090;
}

.hanzi-item.locked::after {
    content: '';
    position: absolute;
    font-size: 1.5em;
    /* color: #696969; */
    width: 30%;
    height: 60%;
    right: 0;
    bottom: -6px;
    background: url(../img/nezha.png) no-repeat center center;
    background-size: auto 90%;
    opacity: 1;
}

.hanzi-item:not(.locked):hover {
    background-color: #ffcccb; /* Light red */
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.hanzi-item.correct {
    background-color: #90ee90; 
    border-color: #32cd32;
}

.hanzi-item.wrong {
    background-color: #ffb6c1; 
    border-color: #ff0000;
}



#learning-section {
    margin-bottom: 20px;
}

.character-display {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
}

.nav-button {
    background-color: #ff9a8b;
    color: white;
    border: none;
    padding: 15px 25px;
    font-size: 2em;
    border-radius: 15px;
    cursor: pointer;
    margin: 0 15px;
    transition: background-color 0.3s ease;
}

.nav-button:hover {
    background-color: #ff6f91;
}

.char-card {
    background-color: #e0f2f7; 
    border-radius: 20px;
    padding: 20px 40px;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.05);
    min-width: 250px;
}

.big-char {
    font-size: 8em; 
    font-weight: bold;
    color: #4CAF50; 
    margin-bottom: 10px;
    line-height: 1; 
    cursor: pointer;
}

.pinyin {
    font-size: 2.5em;
    color: #FFC107; 
    margin-bottom: 5px;
}

.meaning {
    font-size: 1.5em;
    color: #7B1FA2; 
    margin-bottom: 20px;
}

.play-button {
    background-color: #9c27b0;
    color: white;
    border: none;
    padding: 12px 25px;
    font-size: 1.2em;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.play-button:hover {
    background-color: #6a1b9a;
}

.instructions {
    font-size: 1.3em;
    color: #0078d7;
    margin-top: 30px;
    margin-bottom: 20px;
    cursor: pointer;
}

.game-selection {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
}

.game-button {
    position: relative;
    background-color: #66bb6a;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.5em;
    border-radius: 15px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    flex-grow: 1;
    max-width: 250px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.game-button.own {
    background-color: #ff9a8b;
}
.game-button.own:after {
        content: '';
    position: absolute;
    bottom: 11px;
    right: 0;
    width: 30px;
    height: 36px;
    background: url('../img/step.webp') no-repeat center center;
    background-size: auto 100%;
}

.game-button:hover {
    background-color: #4CAF50;
    transform: translateY(-3px);
}


#game-section {
    background-color: #fff9c4; 
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.05);
}

#game-section h2 {
    color: #FF9800;
    font-size: 2.5em;
    margin-bottom: 25px;
}

#game-content {
    background-color: #ffffff;
    border-radius: 15px;
    padding: 25px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.05);
}

#game-content .question-text {
    font-size: 3em;
    font-weight: bold;
    color: #00BCD4;
    margin-bottom: 20px;
}

#game-content .options-grid {
    /* display: grid; */
    /* grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); */
    gap: 15px;
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    max-width: 600px;
}

.option-button {
    flex: 1;
    background-color: #81c784;
    color: white;
    border: none;
    padding: 15px 10px;
    font-size: 2.3em;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    word-break: break-word;
}

.option-button:hover {
    background-color: #66bb6a;
    transform: translateY(-2px);
}

.option-button.correct {
    background-color: #4CAF50; 
}

.option-button.wrong {
    background-color: #FF5252;
}

.game-feedback {
    min-height: 1.8em;
    margin-bottom: 20px;
    font-size: 1.8em;
    font-weight: bold;
}

#feedback-icon {
    margin-right: 10px;
}
#feedback-text {
    color: #555;
}
#feedback-text b {
    color: #4CAF50;
}

.game-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.action-button {
    background-color: #FFAB40; 
    color: white;
    border: none;
    padding: 12px 25px;
    font-size: 1.2em;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.action-button:hover {
    background-color: #FF8F00;
}

#stroke-ani {
    border: 1px solid #FFAB40;
    position: relative;
}
#stroke-write {
    border: 1px solid #66bb6a;
    position: relative;
}
#stroke-write:before, #stroke-ani:before{ content: ''; position: absolute; z-index: 0; top: 50%; left: 0; width: 100%; height: 0; border-top: 1px dashed #999;}
#stroke-write:after, #stroke-ani:after{ content: ''; position: absolute; z-index: 0; top: 0; left: 50%; width: 0px; height: 100%; border-left: 1px dashed #999;}
.draw-box {
    margin: 0 auto;
    position: relative;
    border: 2px solid #FF5252;
    margin-right: 3vw;
}
.draw-box img {
    display: block;
    /* max-width: 18vw; */
    /* width: 18vw; */
    height: 32vw;
    max-height: 390px;
}
.draw-box span {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 90%;
    background-color: #fff;
    transition: all .3s;
}
.draw-wrap .option-button {
    padding: 5px 10px;
    margin: 6px 0;
}

.hidden {
    display: none !important;
}

footer {
    margin-top: 40px;
    color: #aaa;
    font-size: 0.9em;
}

@media (min-width: 700px) {
  /* .draw-box img{
    height: 30vw;
    max-height: 390px;
  } */
}
@media (orientation: landscape) {
  .draw-box img{
    height: 23vw;
    max-height: 250px;
  }
}

/* 小于500宽度的样式 */
@media (max-width: 500px) {
    .container {
        padding: 15px;
    }
    #game-section {
        padding: 16px 10px;
    }
    .game-button {
        font-size: 1em;
        padding: 10px;
    }
    #game-content {
        padding: 16px 10px;
    }
    .game-feedback {
        font-size: 1.2em;
        margin-bottom: 10px;
    }
    #game-content .question-text {
        font-size: 2em;
    }
    .option-button {
        font-size: 1.5em;
        padding: 10px 6px;
    }
    .action-button {
        font-size: 1em;
        padding: 10px 20px;
    }
    .draw-box img{
        width: 40vw;
        height: 56vw;
        max-height: auto;
    }
    header h1 {
        font-size: 2.2em;
        margin-bottom: 20px;
    }
    #game-section h2 {
        font-size: 2.2em;
        margin-bottom: 10px;
    }
    .hanzi-list {
        grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
        height: 67vh;
    }
    .big-char {
        font-size: 6em;
    }
    .pinyin {
        font-size: 2em;
    }
    .instructions {
        margin-top: 16px;
    }
}