/**
 * Myers差异算法可视化样式
 * @author changyadai
 */

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body > .container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 20px;
}

.container {
    text-align: center;
    padding: 25px;
    width: 100%;
    max-width: 1000px;
}

.nav-link {
    position: absolute;
    top: 25px;
    left: 25px;
}

/* ==================== 输入区域 ==================== */
.input-section {
    margin-bottom: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.input-mode-toggle {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
}

.mode-btn {
    padding: 8px 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: transparent;
    color: rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.mode-btn.active {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
    color: #fff;
}

.input-row {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.input-group {
    flex: 1;
    max-width: 300px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    color: #fff;
    font-size: 1rem;
    font-family: 'Consolas', 'Monaco', monospace;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #ef4444;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.3);
}

/* ==================== 序列显示 ==================== */
.sequences-display {
    margin-bottom: 20px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
}

.sequence-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.sequence-row:last-child {
    margin-bottom: 0;
}

.seq-label {
    width: 50px;
    text-align: right;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.sequence-chars {
    display: flex;
    gap: 5px;
}

.seq-char {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    font-weight: bold;
    color: #fff;
    transition: all 0.3s ease;
}

.seq-char.highlight {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
}

.seq-char.delete {
    background: rgba(239, 68, 68, 0.4);
    border: 1px solid #ef4444;
}

.seq-char.insert {
    background: rgba(34, 197, 94, 0.4);
    border: 1px solid #22c55e;
}

.seq-char.keep {
    background: rgba(156, 163, 175, 0.3);
    border: 1px solid rgba(156, 163, 175, 0.5);
}

/* ==================== 编辑图 ==================== */
.edit-graph-section {
    margin-bottom: 20px;
}

.section-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.edit-graph-container {
    overflow: auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.edit-graph {
    display: inline-block;
    position: relative;
}

.graph-row {
    display: flex;
}

.graph-cell {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.graph-node {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transition: all 0.3s ease;
    z-index: 2;
}

.graph-node.visited {
    background: rgba(239, 68, 68, 0.6);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.graph-node.path {
    background: #fbbf24;
    box-shadow: 0 0 15px rgba(251, 191, 36, 0.8);
    transform: scale(1.3);
}

.graph-node.current {
    background: #22c55e;
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.8);
    transform: scale(1.5);
    animation: pulse 0.5s ease-in-out infinite alternate;
}

@keyframes pulse {
    from { transform: scale(1.3); }
    to { transform: scale(1.6); }
}

/* 边（箭头） */
.graph-edge {
    position: absolute;
    background: rgba(255, 255, 255, 0.15);
    transition: all 0.3s ease;
}

.graph-edge.horizontal {
    width: 28px;
    height: 2px;
    left: 6px;
    top: 50%;
    transform: translateY(-50%);
}

.graph-edge.vertical {
    width: 2px;
    height: 28px;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
}

.graph-edge.diagonal {
    width: 36px;
    height: 2px;
    left: 6px;
    top: 6px;
    transform-origin: left center;
    transform: rotate(45deg);
}

.graph-edge.visited {
    background: rgba(239, 68, 68, 0.5);
}

.graph-edge.path {
    background: #fbbf24;
    height: 3px;
    box-shadow: 0 0 10px rgba(251, 191, 36, 0.6);
}

/* 头部标签 */
.graph-header {
    display: flex;
}

.header-cell {
    width: 40px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

.side-label {
    width: 30px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* D值指示器 */
.d-value-indicator {
    margin-top: 15px;
    padding: 10px 25px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 20px;
    display: inline-block;
    color: #ef4444;
    font-size: 1rem;
}

#dValue {
    font-weight: bold;
    font-size: 1.2rem;
}

/* ==================== 差异结果 ==================== */
.diff-result-section {
    margin-bottom: 20px;
}

.diff-result {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    min-height: 60px;
}

.diff-item {
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    animation: diffAppear 0.3s ease-out;
}

@keyframes diffAppear {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.diff-item.keep {
    background: rgba(156, 163, 175, 0.2);
    color: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(156, 163, 175, 0.4);
}

.diff-item.delete {
    background: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    border: 1px solid #ef4444;
    text-decoration: line-through;
}

.diff-item.insert {
    background: rgba(34, 197, 94, 0.3);
    color: #86efac;
    border: 1px solid #22c55e;
}

.diff-item.delete::before {
    content: '- ';
}

.diff-item.insert::before {
    content: '+ ';
}

/* ==================== 蛇形移动动画 ==================== */
.snake-trail {
    position: absolute;
    width: 8px;
    height: 8px;
    background: rgba(34, 197, 94, 0.6);
    border-radius: 50%;
    pointer-events: none;
    animation: snakeFade 0.5s ease-out forwards;
}

@keyframes snakeFade {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.5);
    }
}

/* ==================== 完成动画 ==================== */
.diff-item.celebrate {
    animation: celebrateDiff 0.4s ease-in-out;
}

@keyframes celebrateDiff {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .input-row {
        flex-direction: column;
        align-items: center;
    }
    
    .input-group {
        max-width: 100%;
    }
    
    .graph-cell {
        width: 32px;
        height: 32px;
    }
    
    .header-cell, .side-label {
        width: 32px;
        height: 32px;
    }
}