:root {
    --bg-color: #f0f0f0;
    --card-bg: rgba(255, 255, 255, 0.7);
    --text-color: #333;
    --button-bg: #4CAF50;
    --button-hover: #52c157;
    --end-button-bg: #c9362cf1;
    --end-button-hover: #e73434;
    --table-header-bg: rgba(242, 242, 242, 0.7);
    --input-bg: rgba(255, 255, 255, 0.5);
    --input-border: #ddd;
    --same-s: rgb(16, 117, 51);
    --click-on: rgb(61, 184, 255);
    --winner-th: rgba(255, 247, 0, 0.872);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --card-bg: rgba(30, 30, 30, 0.7);
        --text-color: #e0e0e0;
        --button-bg: #388E3C;
        --button-hover: #2E7D32;
        --end-button-bg: #b32727;
        --end-button-hover: #a62626;
        --table-header-bg: rgba(66, 66, 66, 0.7);
        --input-bg: rgba(60, 60, 60, 0.5);
        --input-border: #555;
        --same-s: rgb(51, 219, 110);
        --click-on: rgb(61, 184, 255);
        --winner-th: rgba(129, 125, 4, 0.956);
    }
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -100;
    filter: blur(120px);
    overflow: hidden;
}

.background-animation div {
    position: absolute;
    border-radius: 50%;
    opacity: 0.7;
    animation: moveBackground 20s linear infinite;
}

@keyframes moveBackground {
    0% { transform: translate(0, 0); }
    25% { transform: translate(3%, 3%); }
    50% { transform: translate(0, 6%); }
    75% { transform: translate(-3%, 3%); }
    100% { transform: translate(0, 0); }
}

.container {
    max-width: 800px;
    width: 90%;
    padding: 20px;
    margin-top: 4rem;
}

.card {
    background-color: var(--card-bg);
    backdrop-filter: blur(100px);
    padding: 30px;
    border-radius: 35px;
    box-shadow:0 0 20px rgba(0, 0, 0, 0.335);
    backdrop-filter: blur(50px);
}

h1 {
    text-align: center;
    color: var(--text-color);
}

a {
    color: var(--text-color);
}

p {
    text-align: center;
    color: var(--text-color);
}

#timetotal {
    text-align: center;
    color: var(--text-color);
}

#timerCard {
    margin-top:30px;
    margin-bottom: 4rem;
    top: 10px;
    left: 50%;
    display: flex;
    align-items: center;
    padding: 15px 30px;
    z-index: 1000;
}

#timerCard i {
    font-size: 24px;
    margin-right: 10px;
}

#timer {
    font-size: 24px;
    font-weight: bold;
}

input, button {
    display: block;
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid var(--input-border);
    border-radius: 15px;
    font-size: 16px;
    box-sizing: border-box;
}

input {
    background-color: var(--input-bg);
    color: var(--text-color);
}

button {
    background-color: var(--button-bg);
    color: white;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}

button:hover {
    background-color: var(--button-hover);
}

button:active {
    transform: scale(0.98);
}

.scoreboard {
    background-color: var(--card-bg);
    backdrop-filter: blur(5px);
    border: none;
    border-radius: 20px;
    padding: 20px;
    margin: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: transform 0.3s ease-in-out;
}

.scoreboard:hover {
    transform: translateY(-5px);
}

.scoreboard h2 {
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.score {
    font-size: 28px;
    font-weight: bold;
    margin: 0 15px;
    transition: transform 0.3s ease-in-out;
}

.score:hover {
    transform: scale(1.1);
}

.score-buttons button,
.score-buttons-plus button {
    width: 40px;
    height: 40px;
    margin: 0 5px;
    font-size: 20px;
    line-height: 40px;
    padding: 0;
    transition: transform 0.1s ease-in-out;
}

.score-buttons button:first-child {
    background-color: var(--end-button-bg);
}

.score-buttons button:first-child:hover {
    background-color: var(--end-button-hover);
}

.score-buttons-plus button {
    width: 40px;
    height: 40px;
    margin: 0 5px;
    font-size: 20px;
    line-height: 40px;
    padding: 0;
}

.score-buttons button:hover,
.score-buttons-plus button:hover {
    transform: scale(1.1);
}

.score-buttons button:active,
.score-buttons-plus button:active {
    transform: scale(0.9);
}

.score-buttons-plus button:first-child {
    background-color: var(--button-bg);
}

.score-buttons-plus button:first-child:hover {
    background-color: var(--button-hover);
}

#endGame {
    background-color: var(--button-bg);
}

#endGame:hover {
    background-color: var(--end-button-hover);
}

#cancelGame {
    background-color: var(--end-button-bg);
}

#cancelGame:hover {
    background-color: var(--end-button-hover);
}

#newGameBtn {
    background-color: var(--end-button-bg);
}

#newGameBtn:hover {
    background-color: var(--end-button-hover);
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 10px;
    margin-top: 20px;
}

th, td {
    padding: 15px;
    text-align: center;
    font-weight: bold;
    background-color: var(--card-bg);
    backdrop-filter: blur(5px);
}

th {
    background-color: var(--table-header-bg);
    font-weight: bold;
}

tr {
    transition: all 0.3s ease;
}

tr:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

td:first-child, th:first-child {
    border-top-left-radius: 15px;
    border-bottom-left-radius: 15px;
}

td:last-child, th:last-child {
    border-top-right-radius: 15px;
    border-bottom-right-radius: 15px;
}

.tied-rank {
    color: var(--same-s);
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    .card {
        padding: 20px;
    }
}

@keyframes floatingAnimation {
    0% { transform: translate(0, 0); }
    50% { transform: translate(5px, -5px); }
    100% { transform: translate(0, 0); }
}

.background-animation div {
    animation: floatingAnimation 5s infinite ease-in-out; /* 從10s減少到5s */
}

.card, .scoreboard {
    transition: transform 0.3s ease-in-out;
}

.card:hover, .scoreboard:hover {
    transform: translateY(-5px);
}

.score {
    transition: transform 0.3s ease-in-out;
}

.score:hover {
    transform: scale(1.1);
}

.container > div {
    transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
}

@keyframes floatingAnimation {
    0% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(10px, -10px);
    }
    100% {
        transform: translate(0, 0);
    }
}

.background-animation div {
    animation: floatingAnimation 10s infinite ease-in-out;
}

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

.card, .scoreboard {
    animation: fadeInUp 0.5s ease-out;
}

/* 為按鈕添加脈動效果 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

@media (max-width: 768px) {
    @keyframes pulse {
        0% { transform: scale(1); }
        50% { transform: scale(1.05); }
        100% { transform: scale(1); }
    }
}



#restartGameBtn, #sg2, #sg1 {
    animation: pulse 2s infinite;
}

/* 為輸入框添加聚焦時的動畫 */
@keyframes focusInput {
    0% { box-shadow: 0 0 0 0 var(--click-on); }
    70% { box-shadow: 0 0 0 10px rgba(76, 175, 80, 0); }
    100% { box-shadow: 0 0 0 0 rgba(76, 175, 80, 0); }
}

input:focus {
    animation: focusInput 1s;
}

/* 為計時器添加顏色變化動畫 */
@keyframes timerColorChange {
    0% { color: var(--text-color); }
    50% { color: var(--button-bg); }
    100% { color: var(--text-color); }
}

.fa-clock {
    animation: timerColorChange 2s infinite;
}

.fa-final {
    color: var(--text-color) !important;
}

/* 為表格行添加交替色彩動畫 */
@keyframes rowColorChange {
    0% { background-color: var(--card-bg); }
    50% { background-color: var(--winner-th);}
    100% { background-color: var(--card-bg); }
}

tr:nth-child(2) {
    animation: rowColorChange 2s infinite;
}





/* 修改 #helpButton 的樣式 */
#helpButton {
    position: fixed;
    bottom: 15px;
    right: 15px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--card-bg); /* 降低不透明度 */
    color: var(--text-color); /* 使用變量以適應深淺色模式 */
    font-size: 24px;
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    backdrop-filter: blur(50px); /* 添加高斯模糊效果 */
    -webkit-backdrop-filter: blur(50px); /* 為 Safari 添加前綴 */
  }
  
#helpButton:hover {
    background-color: rgba(128, 128, 128, 0.8);
    transform: scale(1.1);
}

/* 修改 .modal 的樣式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.034);
    backdrop-filter: blur(60px);
    -webkit-backdrop-filter: blur(60px); /* 為 Safari 添加前綴 */
}

/* 修改 .modal-content 的樣式 */
.modal-content {
    background-color: var(--card-bg);
    backdrop-filter: blur(50px);
    margin: 15% auto;
    padding: 20px;
    border-radius: 35px;
    width: 80%;
    max-width: 600px;
    max-height: 80%;
    overflow-x: hidden;
    overflow-y: scroll;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease-in-out;
}

/* 當 modal 顯示時的樣式 */
.modal.show .modal-content {
    opacity: 1;
    transform: scale(1);
}

/* 置中顯示標題 */
.modal-content h2 {
    text-align: center;
}

/* 針對移動設備的樣式 */
@media (max-width: 768px) {
.modal {
    backdrop-filter: blur(60px);
    -webkit-backdrop-filter: blur(60px);
}

.modal-content {
    background-color: var(--card-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
}
}

.close {
    float:right;
}