/**
 * LCS最长公共子序列可视化样式
 * @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-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: #8b5cf6;
    box-shadow: 0 0 15px rgba(139, 92, 246, 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: 30px;
    text-align: right;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    font-weight: bold;
}

.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;
    position: relative;
}

.seq-char.comparing {
    background: rgba(251, 191, 36, 0.4);
    border: 2px solid #fbbf24;
    box-shadow: 0 0 15px rgba(251, 191, 36, 0.5);
    transform: scale(1.1);
}

.seq-char.matched {
    background: rgba(139, 92, 246, 0.4);
    border: 2px solid #8b5cf6;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.5);
}

.seq-char.in-lcs {
    background: rgba(34, 197, 94, 0.4);
    border: 2px solid #22c55e;
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.5);
}

/* ==================== DP矩阵 ==================== */
.dp-matrix-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;
}

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

.dp-matrix {
    border-collapse: separate;
    border-spacing: 3px;
    margin: 0 auto;
}

.dp-matrix th, .dp-matrix td {
    width: 40px;
    height: 40px;
    text-align: center;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.dp-matrix th {
    background: rgba(139, 92, 246, 0.2);
    color: rgba(255, 255, 255, 0.8);
    font-weight: bold;
}

.dp-matrix th.corner {
    background: transparent;
}

.dp-matrix td {
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.6);
    position: relative;
}

.dp-matrix td.empty {
    color: rgba(255, 255, 255, 0.2);
}

.dp-matrix td.current {
    background: rgba(251, 191, 36, 0.4);
    color: #fff;
    box-shadow: 0 0 15px rgba(251, 191, 36, 0.5);
    transform: scale(1.1);
    z-index: 10;
}

.dp-matrix td.filled {
    background: rgba(139, 92, 246, 0.3);
    color: #fff;
}

.dp-matrix td.match {
    background: rgba(34, 197, 94, 0.4);
    color: #fff;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.4);
}

.dp-matrix td.path {
    background: rgba(34, 197, 94, 0.5);
    color: #fff;
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.6);
}

.dp-matrix td.diagonal-arrow::before {
    content: '↖';
    position: absolute;
    top: 2px;
    left: 2px;
    font-size: 10px;
    color: rgba(255, 255, 255, 0.5);
}

.dp-matrix td.up-arrow::before {
    content: '↑';
    position: absolute;
    top: 2px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: rgba(255, 255, 255, 0.5);
}

.dp-matrix td.left-arrow::before {
    content: '←';
    position: absolute;
    top: 50%;
    left: 2px;
    transform: translateY(-50%);
    font-size: 10px;
    color: rgba(255, 255, 255, 0.5);
}

/* ==================== LCS结果 ==================== */
.lcs-result-section {
    margin-bottom: 20px;
}

.lcs-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.lcs-chars {
    display: flex;
    gap: 8px;
    min-height: 50px;
    align-items: center;
}

.lcs-char {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    border-radius: 8px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 18px;
    font-weight: bold;
    color: #fff;
    box-shadow: 0 4px 15px rgba(34, 197, 94, 0.4);
    animation: lcsCharAppear 0.4s ease-out;
}

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

.lcs-length {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    padding: 10px 25px;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 20px;
}

.lcs-length span {
    color: #22c55e;
    font-weight: bold;
    font-size: 1.3rem;
}

/* ==================== 动画效果 ==================== */
.dp-matrix td.highlight-source {
    box-shadow: inset 0 -3px 0 #3b82f6;
}

.dp-matrix td.highlight-target {
    box-shadow: inset -3px 0 0 #ec4899;
}

/* 回溯路径动画 */
@keyframes pathPulse {
    0%, 100% {
        box-shadow: 0 0 15px rgba(34, 197, 94, 0.6);
    }
    50% {
        box-shadow: 0 0 25px rgba(34, 197, 94, 0.9);
    }
}

.dp-matrix td.path-animate {
    animation: pathPulse 0.5s ease-in-out;
}

/* 完成动画 */
.lcs-char.celebrate {
    animation: celebrateLcs 0.5s ease-in-out;
}

@keyframes celebrateLcs {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2) rotate(5deg); }
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .input-row {
        flex-direction: column;
        align-items: center;
    }
    
    .input-group {
        max-width: 100%;
    }
    
    .dp-matrix th, .dp-matrix td {
        width: 32px;
        height: 32px;
        font-size: 11px;
    }
    
    .seq-char {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }
}