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

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

.game-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    padding: 20px;
    max-width: 900px;
    width: 100%;
    position: relative;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

header h1 {
    color: #4a5568;
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

header p {
    color: #718096;
    font-size: 1.2em;
    margin-bottom: 15px;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

select {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 20px;
    padding: 8px 15px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
}

select:hover {
    border-color: #667eea;
}

.victory-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
}

.moves-counter {
    background: #f7fafc;
    padding: 8px 15px;
    border-radius: 20px;
    border: 2px solid #e2e8f0;
    font-weight: bold;
    color: #4a5568;
}

.game-board {
    position: relative;
    width: 800px;
    height: 600px;
    margin: 0 auto;
    background: linear-gradient(135deg, #e8f5e8 0%, #f0f8ff 100%);
    border-radius: 15px;
    border: 3px solid #e2e8f0;
    overflow: hidden;
}

.location {
    position: absolute;
    width: 100px;
    height: 100px;
    background: white;
    border: 3px solid #cbd5e0;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.location:hover {
    transform: scale(1.05);
    border-color: #667eea;
    box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

.location.drop-target {
    border-color: #48bb78;
    background: #f0fff4;
    transform: scale(1.1);
}

.location.invalid-target {
    border-color: #f56565;
    background: #fff5f5;
}

.location-icon {
    font-size: 2em;
    margin-bottom: 5px;
}

.location-name {
    font-size: 0.8em;
    color: #4a5568;
    font-weight: bold;
}

/* 位置布局 */
.house { top: 100px; left: 100px; }
.bone { top: 100px; left: 250px; }
.boat { top: 100px; left: 500px; }
.tree { top: 250px; left: 250px; }
.well { top: 250px; left: 350px; }
.flower { top: 250px; left: 500px; }
.carrot { top: 400px; left: 250px; }

.connections {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.connection {
    opacity: 0.7;
    transition: all 0.3s ease;
}

.connection:hover {
    opacity: 1;
    stroke-width: 4;
}

.connection.conditional {
    stroke-dasharray: 8,4;
    animation: dash 2s linear infinite;
    opacity: 0.8;
}

.connection.active {
    stroke: #48bb78 !important;
    stroke-width: 4;
    opacity: 1;
    filter: drop-shadow(0 0 6px rgba(72, 187, 120, 0.6));
}

.connection.active marker polygon {
    fill: #48bb78;
}

.connection.inactive {
    stroke: #f56565 !important;
    opacity: 0.4;
    filter: grayscale(50%);
}

.connection.inactive marker polygon {
    fill: #f56565;
}

@keyframes dash {
    to {
        stroke-dashoffset: -24;
    }
}

/* 规则标注样式 */
.rule-label {
    font-family: 'Arial', sans-serif;
    font-size: 11px;
    font-weight: bold;
    fill: #4a5568;
    text-shadow: 1px 1px 2px rgba(255,255,255,0.8);
    pointer-events: none;
    user-select: none;
    transition: all 0.3s ease;
}

.connection.active + .rule-label,
.connection.active ~ .rule-label {
    fill: #48bb78;
    font-weight: 900;
    filter: drop-shadow(0 0 3px rgba(72, 187, 120, 0.5));
}

.connection.inactive + .rule-label,
.connection.inactive ~ .rule-label {
    fill: #f56565;
    opacity: 0.6;
}

/* 增强游戏板的视觉效果 */
.game-board::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(72, 187, 120, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* 位置节点增强效果 */
.location {
    z-index: 5;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.9);
}

.location::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, transparent, rgba(102, 126, 234, 0.2), transparent);
    border-radius: 17px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.location:hover::before {
    opacity: 1;
}

/* 动物拖拽时的路径预览 */
.connection.preview {
    stroke: #ffd700;
    stroke-width: 5;
    opacity: 0.8;
    filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.6));
    animation: pulse 1s ease-in-out infinite alternate;
}

@keyframes pulse {
    from { opacity: 0.6; }
    to { opacity: 1; }
}

.animal {
    position: absolute;
    width: 40px;
    height: 40px;
    font-size: 2em;
    cursor: grab;
    z-index: 10;
    transition: all 0.3s ease;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    user-select: none;
}

.animal:active {
    cursor: grabbing;
    transform: scale(1.2);
    z-index: 20;
}

.animal.dragging {
    opacity: 0.8;
    transform: scale(1.3) rotate(5deg);
    z-index: 30;
}

.animals-container {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 5px;
}

/* 模态框样式 */
.victory-modal, .rules-panel, .hint-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.victory-content, .rules-panel > *, .hint-panel > * {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    max-width: 500px;
    margin: 20px;
}

.victory-content h2 {
    color: #48bb78;
    font-size: 2.5em;
    margin-bottom: 20px;
}

.rules-panel, .hint-panel {
    background: rgba(0,0,0,0.7);
}

.rules-content, .hint-panel > div {
    background: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.rules-content h3, .hint-panel h3 {
    color: #4a5568;
    margin-bottom: 25px;
    font-size: 1.8em;
    text-align: center;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 15px;
}

.rule-section {
    margin-bottom: 25px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.rule-section h4 {
    color: #4a5568;
    margin-bottom: 15px;
    font-size: 1.2em;
}

.path-types {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 15px;
}

.path-type {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.path-example {
    width: 30px;
    height: 3px;
    border-radius: 2px;
}

.path-example.solid {
    background: #666;
}

.path-example.dashed {
    background: linear-gradient(to right, #ff6b6b 50%, transparent 50%);
    background-size: 8px 3px;
}

.path-example.active {
    background: #48bb78;
    box-shadow: 0 0 6px rgba(72, 187, 120, 0.6);
}

.path-example.inactive {
    background: #f56565;
    opacity: 0.6;
}

.condition-rules {
    list-style: none;
    padding: 0;
}

.condition-rules li {
    margin: 12px 0;
    padding: 10px;
    background: white;
    border-radius: 8px;
    border-left: 3px solid #667eea;
    color: #4a5568;
    font-weight: 500;
}

.route {
    font-weight: bold;
    color: #667eea;
    font-size: 1.1em;
}

.rules-content ul {
    text-align: left;
    margin: 15px 0;
    padding-left: 20px;
}

.rules-content li {
    margin: 8px 0;
    color: #4a5568;
    line-height: 1.5;
}

/* 响应式设计 */
@media (max-width: 900px) {
    .game-board {
        width: 100%;
        height: 400px;
        transform: scale(0.8);
    }
    
    header h1 {
        font-size: 2em;
    }
    
    .controls {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 600px) {
    .game-container {
        margin: 10px;
        padding: 15px;
    }
    
    .game-board {
        transform: scale(0.6);
        height: 300px;
    }
    
    header h1 {
        font-size: 1.5em;
    }
    
    header p {
        font-size: 1em;
    }
}