* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    padding: 30px;
    width: 90%;
    max-width: 500px;
    text-align: center;
    backdrop-filter: blur(10px);
    position: relative;
}

.settings-button-container {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
}

.settings-btn {
    background: #f0f0f0;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-btn:hover {
    background: #e0e0e0;
    transform: rotate(90deg);
}

h1 {
    color: #4a4a8c;
    margin-bottom: 20px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    cursor: pointer;
    user-select: none;
    transition: color 0.3s ease;
}

h1:hover {
    color: #667eea;
}

#game-container {
    margin: 25px 0;
}

#board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 8px;
    background-color: #4a4a8c;
    border: 3px solid #4a4a8c;
    border-radius: 10px;
    padding: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    position: relative;
}

.cell-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
}

.cell-base {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #f0f0f0;
    border-radius: 8px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1;
}

.cell-base::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50%;
    height: 50%;
    border: 2px dashed #aaa;
    border-radius: 50%;
}

.cell-piece {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 2;
    transition: transform 0.15s ease; /* 加快悬停动画 */
    touch-action: none; /* 禁用默认触摸行为 */
}

.cell-piece:hover:not(.empty) {
    transform: scale(0.95) !important;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.cell-piece.empty {
    background-color: transparent;
    box-shadow: none;
}

.controls {
    margin: 25px 0;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: bold;
    color: #4a4a8c;
    text-align: left;
}

input {
    padding: 12px;
    font-size: 16px;
    border: 2px solid #ddd;
    border-radius: 8px;
    transition: border-color 0.3s;
}

input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 8px rgba(102, 126, 234, 0.3);
}

.button-group {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

button {
    flex: 1;
    padding: 12px 20px;
    font-size: 16px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

button:active {
    transform: translateY(0);
}

#seed-display {
    font-weight: bold;
    margin: 15px 0;
    padding: 10px;
    background-color: #eef2ff;
    border-radius: 8px;
    color: #4a4a8c;
}

#observe-timer {
    font-size: 20px;
    font-weight: bold;
    margin: 15px 0;
    padding: 10px;
    background-color: #fff3cd;
    border-radius: 8px;
    color: #856404;
}

#observe-timer.hidden {
    display: none;
}

#timer {
    font-size: 20px;
    font-weight: bold;
    margin: 15px 0;
    padding: 10px;
    background-color: #eef2ff;
    border-radius: 8px;
    color: #4a4a8c;
}

#message {
    font-size: 22px;
    font-weight: bold;
    min-height: 30px;
    margin: 15px 0;
    padding: 10px;
    border-radius: 8px;
    color: #4a4a8c;
}

.win {
    background-color: #d4edda;
    color: #155724;
    animation: winPulse 1s infinite;
}

@keyframes winPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.win-animation {
    animation: winBlink 0.5s infinite alternate;
}

@keyframes winBlink {
    from { opacity: 1; box-shadow: 0 0 10px rgba(0, 255, 0, 0.5); }
    to { opacity: 0.7; box-shadow: 0 0 20px rgba(0, 255, 0, 0.8); }
}

/* 加快滑动动画 */
.slide-transition {
    transition: transform 0.15s ease; /* 默认动画时间，将被JavaScript动态覆盖 */
}

/* 设置框样式 */
.modal {
    display: flex;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: white;
    border-radius: 15px;
    padding: 30px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
    color: #aaa;
}

.close:hover {
    color: #000;
}

.modal-content h2 {
    color: #4a4a8c;
    margin-bottom: 20px;
    text-align: center;
}

.setting-group {
    margin-bottom: 25px;
}

.setting-group h3 {
    color: #4a4a8c;
    margin-bottom: 15px;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 5px;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 0 10px;
}

.setting-item label {
    flex: 1;
    text-align: left;
    margin-right: 15px;
}

.setting-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
}

.setting-item input[type="range"] {
    flex: 2;
    margin: 0 10px;
}

.setting-item select {
    flex: 2;
    padding: 8px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
}

.setting-item span {
    flex: 1;
    text-align: right;
    font-weight: bold;
    color: #4a4a8c;
}

.modal-buttons {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 20px;
}

.modal-buttons button {
    flex: 1;
    padding: 12px;
    font-size: 16px;
}

.changelog-content {
    text-align: left;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    margin-top: 10px;
}

.changelog-content ol {
    padding-left: 20px;
}

.changelog-content li {
    margin-bottom: 10px;
    line-height: 1.5;
}

/* 移动端适配 */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    
    .container {
        padding: 20px;
        width: 95%;
    }
    
    .settings-button-container {
        top: 15px;
        right: 15px;
    }
    
    .settings-btn {
        width: 35px;
        height: 35px;
        font-size: 18px;
    }
    
    h1 {
        font-size: 2em;
        margin-bottom: 15px;
    }
    
    #board {
        gap: 6px;
        padding: 8px;
        border-width: 2px;
    }
    
    .cell-container {
        aspect-ratio: 1;
    }
    
    .controls {
        margin: 20px 0;
    }
    
    .input-group {
        gap: 6px;
    }
    
    input {
        padding: 10px;
        font-size: 16px;
    }
    
    .button-group {
        gap: 10px;
        margin-top: 8px;
    }
    
    button {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    #seed-display, #observe-timer, #timer, #message {
        font-size: 16px;
        padding: 8px;
    }
    
    #message {
        font-size: 18px;
        min-height: 25px;
    }
    
    .modal-content {
        padding: 20px;
        width: 95%;
    }
    
    .setting-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .setting-item label {
        margin-right: 0;
        width: 100%;
    }
    
    .setting-item input[type="range"],
    .setting-item select {
        width: 100%;
        margin: 0;
    }
    
    .setting-item span {
        text-align: left;
        width: 100%;
    }
    
    .modal-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 15px;
    }
    
    .settings-button-container {
        top: 10px;
        right: 10px;
    }
    
    .settings-btn {
        width: 30px;
        height: 30px;
        font-size: 16px;
    }
    
    h1 {
        font-size: 1.8em;
        margin-bottom: 10px;
    }
    
    #board {
        gap: 4px;
        padding: 6px;
        border-width: 2px;
    }
    
    .controls {
        margin: 15px 0;
    }
    
    .input-group {
        gap: 5px;
    }
    
    input {
        padding: 8px;
        font-size: 14px;
    }
    
    .button-group {
        gap: 8px;
        margin-top: 6px;
    }
    
    button {
        padding: 8px 12px;
        font-size: 13px;
    }
    
    #seed-display, #observe-timer, #timer {
        font-size: 14px;
        padding: 6px;
    }
    
    #message {
        font-size: 16px;
        min-height: 20px;
        padding: 6px;
    }
}