/* 全局样式 */
:root {
    --primary-color: #6658d3;
    --primary-light: rgba(102, 88, 211, 0.1);
    --primary-dark: #4a3fc7;
    --accent-color: #8075e5;
    --text-color: #333333;
    --text-light: #6c757d;
    --bg-color: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e9ecef;
    --border-input: #ced4da;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --transition-speed: 0.3s;
    --header-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --mobile-input-height: 100px;
    --mobile-padding: 10px;
    --mobile-border-radius: 8px;
}

.dark-mode {
    --primary-color: #9c8df8;
    --primary-light: rgba(156, 141, 248, 0.2);
    --primary-dark: #7c6de5;
    --accent-color: #aca0f8;
    --text-color: #e1e1e1;
    --text-light: #a8a8a8;
    --bg-color: linear-gradient(135deg, #2d2d35 0%, #1a1a24 100%);
    --bg-light: #2a2a2a;
    --bg-white: #333340;
    --border-color: #444;
    --border-input: #555;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --header-bg: linear-gradient(135deg, #464c9e 0%, #573b7a 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Roboto', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
    transition: background 0.5s ease;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background-color: var(--bg-white);
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow-color);
    overflow: hidden;
    transition: background-color 0.5s ease, box-shadow 0.5s ease;
}

header {
    background: var(--header-bg);
    color: white;
    padding: 30px;
    text-align: center;
    position: relative;
    transition: background 0.5s ease;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

header h1 i {
    margin-right: 10px;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 深色模式切换 */
.theme-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
}

/* 语言切换 */
.lang-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.lang-switch {
    display: inline-block;
    position: relative;
    cursor: pointer;
}

.lang-switch input {
    display: none;
}

.lang-switch .lang-text {
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
    background-color: rgba(255, 255, 255, 0.2);
}

.lang-switch .lang-text:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Add a subtle pulse animation when changing language */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.lang-switch-wrapper.pulse {
    animation: pulse 0.5s ease;
}

/* 标签页样式 */
.tabs {
    display: flex;
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.5s ease;
}

.tab-btn {
    padding: 15px 25px;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    position: relative;
}

.tab-btn i {
    margin-right: 8px;
}

.tab-btn:hover {
    background-color: var(--primary-light);
}

.tab-btn.active {
    color: var(--primary-color);
    font-weight: 600;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

/* 内容区域样式 */
.tab-content {
    padding: 20px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

/* 输入区域样式 */
.input-section {
    margin-bottom: 30px;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    transition: color 0.5s ease;
}

h2 i {
    margin-right: 10px;
    color: var(--primary-color);
}

h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-color);
    transition: color 0.5s ease;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    transition: color 0.5s ease;
}

.textarea-container {
    position: relative;
    width: 100%;
    display: flex;
    flex-direction: column;
}

textarea {
    width: 100%;
    height: 120px;
    padding: 12px;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    transition: border 0.3s ease, background-color 0.5s ease, color 0.5s ease;
    background-color: var(--bg-white);
    color: var(--text-color);
}

.textarea-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    align-self: flex-end;
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border-input);
    background-color: var(--bg-light);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.icon-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.icon-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--shadow-color);
}

.icon-btn i {
    margin-right: 0;
    font-size: 1rem;
}

.clear-btn {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border-color: rgba(220, 53, 69, 0.2);
}

.clear-btn:hover {
    background-color: rgba(220, 53, 69, 0.2);
    color: var(--danger-color);
}

.random-btn {
    background-color: rgba(102, 88, 211, 0.1);
    color: var(--primary-color);
    border-color: rgba(102, 88, 211, 0.2);
}

.random-btn:hover {
    background-color: rgba(102, 88, 211, 0.2);
}

.character-count {
    margin-top: 5px;
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-light);
}

.input-with-buttons {
    display: flex;
    align-items: center;
    width: fit-content;
}

.key-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-input);
    background-color: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.key-btn:first-child {
    border-radius: 6px 0 0 6px;
    border-right: none;
}

.key-btn:last-child {
    border-radius: 0 6px 6px 0;
    border-left: none;
}

.key-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

input[type="number"] {
    width: 70px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--border-input);
    font-family: inherit;
    font-size: 1rem;
    text-align: center;
    transition: border 0.3s ease, background-color 0.5s ease, color 0.5s ease;
    background-color: var(--bg-white);
    color: var(--text-color);
    -moz-appearance: textfield; /* Firefox */
}

/* 去除数字输入框的上下箭头 */
input[type="number"]::-webkit-inner-spin-button, 
input[type="number"]::-webkit-outer-spin-button { 
    -webkit-appearance: none;
    margin: 0;
}

textarea:focus, input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.actions {
    display: flex;
    gap: 10px;
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

button i {
    margin-right: 8px;
}

button[id$="encrypt"] {
    background-color: var(--primary-color);
    color: white;
}

button[id$="decrypt"] {
    background-color: var(--primary-dark);
    color: white;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

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

/* 输出区域样式 */
.output-section {
    background-color: var(--bg-light);
    border-radius: 8px;
    padding: 20px;
    transition: background-color 0.5s ease;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.copy-btn {
    background-color: var(--primary-light);
    color: var(--primary-color);
    border: 1px solid var(--border-input);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    position: relative;
}

.copy-btn span {
    display: inline-block;
}

.copy-btn i {
    margin-right: 5px;
    font-size: 1rem;
}

.copy-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.copy-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.output {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 15px;
    min-height: 100px;
    margin-bottom: 20px;
    white-space: pre-wrap;
    word-break: break-all;
    transition: background-color 0.5s ease, border 0.5s ease, color 0.5s ease;
    color: var(--text-color);
    position: relative;
}

.output.highlight {
    animation: highlight 1s ease;
}

@keyframes highlight {
    0% { background-color: var(--primary-light); }
    100% { background-color: var(--bg-white); }
}

/* 暴力破解结果样式 */
.bruteforce-results {
    display: none;
    margin-top: 30px;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-light);
    transition: all 0.3s ease;
}

.bruteforce-results.show {
    display: block;
    animation: fadeIn 0.5s ease;
}

.bruteforce-results h3 {
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.results-container {
    max-height: 500px;
    overflow-y: auto;
    padding-right: 10px;
}

.result-item {
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 6px;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.result-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--shadow-color);
}

.result-item.highlighted {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
}

/* 添加排序控制和可靠性评分样式 */
.sort-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.sort-btn {
    padding: 8px 15px;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.sort-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.sort-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px dashed var(--border-color);
}

.key-label {
    font-weight: 500;
    color: var(--primary-color);
}

.score-label {
    font-size: 0.9rem;
    color: var(--text-light);
    background-color: rgba(102, 88, 211, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid rgba(102, 88, 211, 0.2);
}

/* 栅栏可视化 */
.visualization {
    margin-top: 20px;
    display: none;
}

.visualization.show {
    display: block;
    animation: fadeIn 0.5s ease;
}

.rail-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 15px;
    overflow-x: auto;
    max-width: 100%;
    transition: background-color 0.5s ease, border 0.5s ease;
}

.rail {
    display: flex;
    gap: 5px;
    flex-wrap: nowrap;
}

.rail-cell {
    min-width: 30px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-input);
    border-radius: 4px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
    color: var(--text-color);
}

/* Rail Fence adaptive sizing based on input length */
.rail-container.long-text .rail-cell {
    min-width: 24px;
    width: 24px;
    height: 24px;
    font-size: 0.8rem;
}

.rail-container.very-long-text .rail-cell {
    min-width: 18px;
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
}

.rail-cell.filled {
    background-color: var(--primary-light);
    border-color: var(--primary-color);
    animation: pop 0.3s ease;
}

@keyframes pop {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* 历史记录部分 */
.history-section {
    padding: 0 20px 20px;
    display: none;
}

.history-section.show {
    display: block;
}

.history-container {
    max-height: 200px;
    overflow-y: auto;
    background-color: var(--bg-light);
    border-radius: 6px;
    padding: 10px;
    border: 1px solid var(--border-color);
    transition: background-color 0.5s ease, border 0.5s ease;
}

.history-item {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.history-item:last-child {
    border-bottom: none;
}

.history-item:hover {
    background-color: var(--primary-light);
}

.history-info {
    flex: 1;
}

.history-type {
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 3px;
    display: flex;
    align-items: center;
}

.history-type i {
    margin-right: 5px;
}

.history-text {
    font-size: 0.9rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 500px;
}

.history-actions {
    display: flex;
    gap: 5px;
}

.history-btn {
    background: none;
    border: none;
    color: var(--text-light);
    padding: 5px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.history-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    transform: translateY(0);
    box-shadow: none;
}

/* 底部样式 */
footer {
    background-color: var(--bg-light);
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
    color: var(--text-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.5s ease, border-top 0.5s ease;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    color: var(--text-light);
    transition: color 0.3s ease;
}

.social-icons a:hover {
    color: var(--primary-color);
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--success-color);
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transform: translateX(200%);
    transition: transform 0.5s ease;
    z-index: 1000;
}

.notification.show {
    transform: translateX(0);
}

.notification i {
    margin-right: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .actions {
        flex-direction: column;
        gap: 10px;
        position: relative;
    }
    
    .swap-btn {
        margin-left: 0;
        width: 100% !important;
        height: auto;
        order: -1;
        padding: 10px 15px;
        background-color: var(--bg-light);
    }
    
    .results-container {
        grid-template-columns: 1fr;
    }
    
    .container {
        border-radius: 8px;
        max-width: 100%;
        margin: 0;
    }
    
    header {
        padding: 20px 15px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }

    header p {
        font-size: 1rem;
    }

    .theme-switch-wrapper {
        position: static;
        justify-content: center;
        margin-top: 15px;
    }
    
    .lang-switch-wrapper {
        position: static;
        justify-content: center;
        margin: 15px auto 10px;
        width: fit-content;
    }
    
    .tab-btn {
        padding: 12px 10px;
        font-size: 0.9rem;
        flex-grow: 1;
        text-align: center;
    }

    .tab-btn i {
        margin-right: 4px;
    }

    .input-section, .output-section {
        padding: 15px;
    }

    textarea {
        min-height: 120px;
    }

    button {
        padding: 10px 15px;
        width: 100%;
        font-size: 0.95rem;
    }

    .input-with-buttons {
        width: 100%;
    }

    input[type="number"] {
        padding: 10px;
        font-size: 1rem;
    }

    .key-btn {
        width: 40px;
        height: 40px;
    }

    .form-group {
        margin-bottom: 15px;
    }

    footer {
        flex-direction: column;
        gap: 10px;
        padding: 15px;
    }
    
    .rail-cell {
        min-width: 25px;
        width: 25px;
        height: 25px;
        font-size: 0.8rem;
    }

    .rail-container.long-text .rail-cell {
        min-width: 20px;
        width: 20px;
        height: 20px;
        font-size: 0.75rem;
    }
    
    .rail-container.very-long-text .rail-cell {
        min-width: 16px;
        width: 16px;
        height: 16px;
        font-size: 0.65rem;
    }

    .history-item {
        padding: 12px;
        flex-direction: column;
        align-items: flex-start;
    }

    .history-actions {
        margin-top: 10px;
        width: 100%;
        justify-content: flex-end;
    }

    /* 提高滚动的流畅度 */
    body {
        -webkit-overflow-scrolling: touch;
    }

    /* 提升表单元素的可用性 */
    input, textarea, select, button {
        -webkit-tap-highlight-color: transparent; /* 移除iOS默认的点击高亮 */
    }

    /* 触摸反馈效果 */
    .tab-btn:active, button:active, .icon-btn:active, .key-btn:active, .copy-btn:active {
        transform: scale(0.95);
        transition: transform 0.1s;
        opacity: 0.9;
    }

    /* 提高点击区域 */
    .tab-btn, .icon-btn, .key-btn, .copy-btn, .history-btn {
        min-height: 44px;
        min-width: 44px;
    }

    /* 移动端专用的滚动容器优化 */
    .history-container, .results-container {
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

    /* 优化长文本输入框 */
    textarea {
        transition: height 0.2s ease;
    }

    /* 消除触摸时的蓝色边框 */
    a, button, input, textarea {
        -webkit-tap-highlight-color: rgba(0,0,0,0);
    }

    /* 优化固定位置元素 */
    .notification {
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
    }

    /* 优化复制按钮 */
    .output-header {
        display: flex;
        justify-content: flex-end;
    }
    
    .copy-btn {
        /* 圆角正方形按钮 */
        width: 36px;
        height: 36px;
        min-width: initial;
        min-height: initial;
        padding: 0;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-left: auto;
        transition: all 0.2s ease;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        position: relative;
        background-color: var(--primary-light);
        color: var(--primary-color);
    }
    
    /* 悬停效果 */
    .copy-btn:hover {
        transform: translateY(-2px);
        background-color: var(--primary-color);
        color: white;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    }
    
    .copy-btn i {
        margin-right: 0;
        font-size: 1rem;
    }
    
    /* 隐藏复制按钮中的文字 */
    .copy-btn span {
        display: none;
    }
    
    /* 添加点击波纹效果 */
    @keyframes ripple {
        0% { transform: scale(0.8); opacity: 1; }
        100% { transform: scale(1.5); opacity: 0; }
    }
    
    .copy-btn:active::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 30px;
        height: 30px;
        background: rgba(102, 88, 211, 0.3);
        border-radius: 50%;
        transform: translate(-50%, -50%) scale(0);
        animation: ripple 0.6s ease-out;
    }

    /* 添加性能优化 */
    .container, .output, .button, .tabs, header, footer {
        will-change: transform;
    }
    
    /* 优化输入区域 */
    textarea {
        border-radius: var(--mobile-border-radius);
        padding: var(--mobile-padding);
        height: var(--mobile-input-height);
        line-height: 1.4;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }
    
    /* 改进输出区域显示 */
    .output {
        border-radius: var(--mobile-border-radius);
        padding: var(--mobile-padding);
        line-height: 1.4;
        word-break: break-word;
        hyphens: auto;
    }
    
    /* 改进暴力破解结果区域 */
    .bruteforce-results {
        padding: 15px 10px;
        border-radius: var(--mobile-border-radius);
    }
    
    .result-item {
        padding: 10px;
        margin-bottom: 8px;
        border-radius: var(--mobile-border-radius);
    }
    
    /* 栅栏可视化优化 */
    .rail-container {
        padding: 10px;
        border-radius: var(--mobile-border-radius);
    }
    
    /* 确保表单输入整齐对齐 */
    .input-with-buttons {
        display: flex;
        align-items: stretch;
        height: 40px;
    }
    
    input[type="number"] {
        height: 100%;
    }
    
    .key-btn {
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Improve modal for mobile */
    .modal-content {
        width: 95%;
        margin: 2% auto;
        max-height: 90vh;
    }
    
    .common-words-controls {
        flex-direction: column;
    }
    
    .search-container, .add-word-container {
        width: 100%;
    }
    
    .common-word-item {
        flex-direction: column;
        padding: 15px 10px;
    }
    
    .word-column, .frequency-column, .type-column {
        width: 100%;
        margin-bottom: 8px;
        text-align: left;
    }
    
    .frequency-control {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .delete-word-btn {
        position: absolute;
        top: 5px;
        right: 5px;
        /* Improve tap target size for mobile */
        padding: 10px;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: rgba(255, 82, 82, 0.1);
        border-radius: 50%;
        z-index: 5;
    }
    
    /* Add a larger touch area for the delete button */
    .delete-word-btn::before {
        content: '';
        position: absolute;
        top: -5px;
        left: -5px;
        right: -5px;
        bottom: -5px;
        z-index: -1;
    }
    
    /* Ensure the common word item has enough space for the delete button */
    .common-word-item {
        position: relative;
        padding-right: 50px;
    }
}

/* 添加反转按钮样式 */
.swap-btn {
    background-color: var(--bg-white);
    color: var(--text-light);
    border: 1px solid var(--border-input);
    margin-left: auto;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-speed) ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.swap-btn i {
    font-size: 1rem;
    line-height: 1;
    margin: 0;
}

.swap-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.swap-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--shadow-color);
}

/* 额外添加针对更小屏幕的优化 */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .container {
        border-radius: 6px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    }

    header {
        padding: 15px 10px;
    }

    header h1 {
        font-size: 1.5rem;
        margin-bottom: 5px;
    }

    header p {
        font-size: 0.85rem;
    }

    .tab-content {
        padding: 15px 10px;
    }

    .tab-btn {
        padding: 10px 5px;
        font-size: 0.85rem;
    }

    h2 {
        font-size: 1.3rem;
        margin-bottom: 12px;
        padding-bottom: 8px;
    }

    h3 {
        font-size: 1.05rem;
    }

    label {
        font-size: 0.9rem;
        margin-bottom: 5px;
    }

    .textarea-container textarea {
        padding: 10px;
        min-height: 100px;
        font-size: 0.95rem;
    }

    .character-count {
        font-size: 0.8rem;
        margin-top: 2px;
    }

    .output {
        font-size: 0.9rem;
        padding: 10px;
        min-height: 80px;
        margin-bottom: 15px;
    }

    .notification {
        width: 90%;
        left: 5%;
        right: auto;
        padding: 8px 10px;
        font-size: 0.9rem;
    }

    /* 优化按钮的触摸区域 */
    .icon-btn {
        width: 38px;
        height: 38px;
    }

    /* 扩大表单元素的触摸区域 */
    .key-btn {
        width: 38px;
        height: 38px;
    }

    /* 优化历史记录显示 */
    .history-text {
        max-width: 100%;
        font-size: 0.85rem;
    }

    .rail-cell {
        min-width: 22px;
        width: 22px;
        height: 22px;
        font-size: 0.7rem;
    }

    .rail-container.long-text .rail-cell {
        min-width: 18px;
        width: 18px;
        height: 18px;
        font-size: 0.65rem;
    }
    
    .rail-container.very-long-text .rail-cell {
        min-width: 14px;
        width: 14px;
        height: 14px;
        font-size: 0.6rem;
    }

    .copy-btn {
        width: 32px;
        height: 32px;
        border-radius: 6px;
    }
    
    .copy-btn i {
        font-size: 0.9rem;
    }
    
    /* 改进输入表单和按钮的间距 */
    .form-group {
        margin-bottom: 12px;
    }
    
    /* 主要操作按钮优化 */
    button[id$="encrypt"],
    button[id$="decrypt"] {
        padding: 12px 0;
        font-size: 0.9rem;
    }

    /* 增加操作按钮的间距 */
    .actions {
        gap: 8px;
    }
    
    /* 输出区域的间距优化 */
    .output-section {
        padding: 15px 10px;
    }
}

@media (max-width: 360px) {
    header h1 {
        font-size: 1.4rem;
    }
    
    .tab-btn {
        padding: 8px 3px;
        font-size: 0.8rem;
    }
    
    .tab-btn i {
        margin-right: 3px;
    }
    
    .copy-btn {
        width: 30px;
        height: 30px;
    }
    
    .copy-btn i {
        font-size: 0.85rem;
    }
    
    button[id$="encrypt"],
    button[id$="decrypt"] {
        font-size: 0.85rem;
        padding: 10px 0;
    }
}

/* 输入高亮动画效果 */
@keyframes inputHighlight {
    0% { box-shadow: 0 0 0 0 rgba(102, 88, 211, 0); border-color: var(--border-input); }
    50% { box-shadow: 0 0 0 4px rgba(102, 88, 211, 0.2); border-color: var(--primary-color); }
    100% { box-shadow: 0 0 0 0 rgba(102, 88, 211, 0); border-color: var(--border-input); }
}

textarea.highlight-input {
    animation: inputHighlight 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 增强的可靠性评分 UI 样式 */
.score-details-toggle {
    cursor: pointer;
    margin-left: 8px;
    color: #6c757d;
    transition: color 0.2s ease;
}

.score-details-toggle:hover {
    color: #0056b3;
}

.score-details {
    background-color: rgba(240, 248, 255, 0.9);
    border-radius: 6px;
    padding: 10px;
    margin: 8px 0;
    border-left: 3px solid #0d6efd;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.score-component {
    display: flex;
    align-items: center;
    margin-bottom: 6px;
}

.component-label {
    min-width: 130px;
    margin-right: 10px;
    font-size: 0.85rem;
    color: #495057;
}

.progress-bar {
    flex-grow: 1;
    height: 8px;
    background-color: #e9ecef;
    border-radius: 4px;
    overflow: hidden;
    margin: 0 10px;
}

.progress {
    height: 100%;
    background-color: #0d6efd;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.component-value {
    min-width: 30px;
    text-align: right;
    font-size: 0.85rem;
    font-weight: bold;
    color: #0d6efd;
}

.common-words-found {
    margin-top: 8px;
    font-size: 0.85rem;
    color: #6c757d;
    border-top: 1px dashed #dee2e6;
    padding-top: 6px;
}

.common-words-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 5px;
}

.word-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    background-color: #e9f5ff;
    color: #0d6efd;
    border: 1px solid #c5e1ff;
}

/* 结果项调整 */
.result-item {
    margin-bottom: 15px;
    cursor: pointer;
}

.result-header {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.key-label {
    font-weight: bold;
    margin-right: 10px;
}

.score-label {
    color: #0d6efd;
    font-weight: 500;
}

.result-text {
    background-color: #f8f9fa;
    padding: 10px;
    border-radius: 4px;
    border-left: 3px solid #6c757d;
    font-family: monospace;
    white-space: pre-wrap;
    word-break: break-word;
}

/* 高亮结果项 */
.result-item.highlighted .result-text {
    background-color: #fff8e6;
    border-left-color: #ffc107;
}

.result-item:hover .result-text {
    background-color: #f0f6ff;
    border-left-color: #0d6efd;
}

/* Common Words Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--bg-white);
    margin: 5% auto;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    width: 80%;
    max-width: 900px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    animation: modalFadeIn 0.3s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

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

.modal-header {
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--primary-color);
    color: white;
    border-radius: 10px 10px 0 0;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: white;
}

.close-modal {
    color: var(--text-color);
    font-size: 1.8rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s;
}

.close-modal:hover {
    color: var(--accent-color);
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.common-words-controls {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.search-container, .add-word-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

#search-common-words, #new-common-word {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-white);
    color: var(--text-color);
    font-size: 0.9rem;
    width: 250px;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
}

#add-common-word {
    padding: 8px 16px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

#add-common-word:hover {
    background-color: var(--accent-hover-color);
}

.common-words-list {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    background-color: var(--bg-white);
    box-shadow: 0 2px 5px var(--shadow-color);
}

.list-header {
    display: flex;
    padding: 10px 15px;
    background-color: var(--primary-light);
    font-weight: bold;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

.word-column {
    flex: 2;
    font-weight: 500;
}

.frequency-column {
    flex: 1;
    text-align: center;
    font-family: monospace;
    font-size: 0.95rem;
}

.type-column {
    flex: 1;
    text-align: center;
}

#common-words-container {
    max-height: 400px;
    overflow-y: auto;
}

.common-word-item {
    display: flex;
    padding: 8px 15px;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s;
    align-items: center;
}

.common-word-item:nth-child(odd) {
    background-color: var(--bg-light);
}

.common-word-item:hover {
    background-color: rgba(102, 88, 211, 0.05);
}

.word-type {
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 0.8rem;
    display: inline-block;
}

.word-type-default {
    background-color: #e9ecef;
    color: #495057;
}

.word-type-custom {
    background-color: var(--accent-color);
    color: white;
}

/* Add styles for the word added notification and delete button */
.word-added-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--accent-color);
    color: white;
    padding: 12px 20px;
    border-radius: 4px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    z-index: 1100;
    transform: translateX(120%);
    transition: transform 0.3s ease-out;
    max-width: 300px;
}

.word-added-notification.show {
    transform: translateX(0);
}

.no-results {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-style: italic;
}

.delete-word-btn {
    background: none;
    border: none;
    color: #ff5252;
    cursor: pointer;
    padding: 5px;
    margin-left: 10px;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.delete-word-btn:hover {
    background-color: rgba(255, 82, 82, 0.1);
}

/* Add styles for the view dictionary button */
.view-dict-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 12px;
    margin: 10px 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    z-index: 1;
}

.view-dict-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.enhanced-analysis {
    margin-top: 15px;
    padding: 15px;
    background-color: var(--card-bg);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

/* Add styles for the frequency adjustment controls */
.frequency-control {
    display: flex;
    align-items: center;
    gap: 5px;
    justify-content: center;
}

.frequency-slider {
    width: 80px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: #ddd;
    outline: none;
    border-radius: 2px;
    cursor: pointer;
}

.frequency-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
    transition: all 0.2s ease;
}

.frequency-slider::-webkit-slider-thumb:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

.frequency-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
    transition: all 0.2s ease;
}

.frequency-slider::-moz-range-thumb:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

.frequency-value {
    min-width: 50px;
    font-size: 0.85rem;
    color: var(--text-color);
    font-family: monospace;
    text-align: center;
}

.freq-label {
    color: var(--text-light);
    margin-right: 2px;
    cursor: help;
    font-size: 14px;
}

.freq-label i {
    transition: color 0.2s;
}

.freq-label:hover i {
    color: var(--primary-color);
}

/* Key display for monoalphabetic cipher */
.key-display {
    margin: 15px 0;
    padding: 15px;
    background-color: #f5f5f5;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.key-mapping {
    font-family: 'Courier New', monospace;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.plaintext-row, .ciphertext-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.alphabet {
    letter-spacing: 5px;
    font-weight: bold;
}

#key-display {
    letter-spacing: 5px;
    font-weight: bold;
    color: #6658d3;
}

.key-input-container {
    display: flex;
    gap: 10px;
}

#monoalpha-key {
    flex: 1;
    font-family: 'Courier New', monospace;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.generate-key-btn {
    background-color: #6658d3;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    transition: background-color 0.2s;
}

.generate-key-btn:hover {
    background-color: #5346c9;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .key-display {
        background-color: #2a2a2a;
    }
}

/* Key mapping display in brute force results */
.key-mapping-display {
    margin: 15px 0;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid var(--primary-color);
    font-family: 'Courier New', monospace;
}

.key-mapping-display .plaintext-row,
.key-mapping-display .ciphertext-row {
    display: flex;
    gap: 10px;
    align-items: center;
    margin: 5px 0;
}

.key-mapping-display .alphabet {
    letter-spacing: 3px;
    font-weight: bold;
}

.apply-key-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 10px 15px;
    margin-top: 12px;
    width: 100%;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.apply-key-btn::before {
    content: '\f00c';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    margin-right: 8px;
}

.apply-key-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.apply-key-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .key-display {
        background-color: #2a2a2a;
    }
    
    .key-mapping-display {
        background-color: #2a2a2a;
    }
    
    .apply-key-btn {
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    }
}

/* Playfair Cipher Styles */
.playfair-matrix-display {
    margin: 15px 0;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.playfair-matrix-display:hover {
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.playfair-matrix {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-top: 15px;
    max-width: 350px;
}

.matrix-cell {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    border: 1px solid var(--border-input);
    border-radius: 8px;
    font-weight: bold;
    font-size: 18px;
    font-family: 'Courier New', monospace;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.matrix-cell:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    z-index: 2;
}

.matrix-cell::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 50%);
    pointer-events: none;
}

.matrix-cell.keyword {
    background-color: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(102, 88, 211, 0.2);
}

.matrix-cell.keyword:hover {
    background-color: var(--primary-color);
    color: white;
}

.matrix-cell.highlight {
    animation: pulse-highlight 1s ease infinite;
}

@keyframes pulse-highlight {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(102, 88, 211, 0.4); }
    50% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(102, 88, 211, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(102, 88, 211, 0); }
}

.filler-options {
    display: flex;
    gap: 20px;
    margin-top: 10px;
    padding: 10px;
    background-color: var(--bg-light);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px 15px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.radio-label:hover {
    background-color: var(--primary-light);
}

.radio-label input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-input);
    border-radius: 50%;
    outline: none;
    transition: all 0.3s ease;
    position: relative;
}

.radio-label input[type="radio"]:checked {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
}

.radio-label input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--primary-color);
}

.pairs-display {
    margin-top: 25px;
    display: none;
    animation: fadeIn 0.5s ease;
    background-color: var(--bg-light);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.pairs-display.show {
    display: block;
    animation: slideUp 0.5s ease;
}

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

.pairs-container {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 15px;
    padding: 15px;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: background-color 0.5s ease, border 0.5s ease;
    max-height: 300px;
    overflow-y: auto;
}

.letter-pair {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    background-color: var(--primary-light);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    font-size: 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.letter-pair:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.letter-pair .arrow {
    color: var(--primary-color);
    font-size: 18px;
    margin: 0 5px;
}

.letter-pair[data-rule="same-row"] {
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 3px solid #ffc107;
}

.letter-pair[data-rule="same-column"] {
    background-color: rgba(40, 167, 69, 0.1);
    border-left: 3px solid #28a745;
}

.letter-pair[data-rule="rectangle"] {
    background-color: rgba(0, 123, 255, 0.1);
    border-left: 3px solid #007bff;
}

.playfair-rule-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
    padding: 10px;
    background-color: var(--bg-white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.rule-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

.rule-color {
    width: 15px;
    height: 15px;
    border-radius: 3px;
}

.rule-color.same-row {
    background-color: #ffc107;
}

.rule-color.same-column {
    background-color: #28a745;
}

.rule-color.rectangle {
    background-color: #007bff;
}

.playfair-note {
    margin-top: 15px;
    padding: 10px 15px;
    background-color: rgba(102, 88, 211, 0.1);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-color);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .playfair-matrix-display {
        background-color: #2a2a2a;
    }
    
    .matrix-cell {
        background-color: #333;
        color: #eee;
    }
    
    .matrix-cell.keyword {
        background-color: rgba(102, 88, 211, 0.2);
        color: #9c8df8;
    }
    
    .matrix-cell.keyword:hover {
        background-color: rgba(102, 88, 211, 0.4);
        color: white;
    }
    
    .letter-pair[data-rule="same-row"] {
        background-color: rgba(255, 193, 7, 0.15);
    }
    
    .letter-pair[data-rule="same-column"] {
        background-color: rgba(40, 167, 69, 0.15);
    }
    
    .letter-pair[data-rule="rectangle"] {
        background-color: rgba(0, 123, 255, 0.15);
    }
    
    .playfair-note {
        background-color: rgba(102, 88, 211, 0.15);
    }
}

/* Mobile responsiveness for Playfair */
@media (max-width: 768px) {
    .playfair-matrix {
        max-width: 100%;
        gap: 5px;
    }
    
    .matrix-cell {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .letter-pair {
        padding: 6px 10px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .matrix-cell {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .playfair-rule-legend {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
}

/* Vigenère Cipher Styles */
.vigenere-key-display {
    margin: 15px 0;
    padding: 15px;
    background-color: #f5f5f5;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.expansion-display {
    margin-top: 10px;
    padding: 15px;
    background-color: var(--bg-white);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
    font-size: 16px;
    letter-spacing: 2px;
    line-height: 1.5;
    overflow-x: auto;
    white-space: nowrap;
}

.expansion-display .plaintext, 
.expansion-display .keyword {
    display: block;
    margin-bottom: 5px;
}

.expansion-display .plaintext {
    color: var(--text-color);
}

.expansion-display .keyword {
    color: var(--primary-color);
    font-weight: 700;
}

.expansion-display .letter {
    display: inline-block;
    width: 14px;
    text-align: center;
    position: relative;
}

.expansion-display .letter.key-letter {
    color: var(--primary-color);
    font-weight: 700;
}

.expansion-display .letter.shift-arrow {
    position: relative;
    color: var(--accent-color);
    width: 14px;
    font-weight: normal;
    font-size: 12px;
}

.expansion-display .letter.encrypted {
    color: #28a745;
    font-weight: 700;
}

.vigenere-table-container {
    margin-top: 15px;
    padding: 15px;
    background-color: var(--bg-white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

.vigenere-table {
    font-family: 'Courier New', monospace;
    border-collapse: collapse;
    margin: 0 auto;
}

.vigenere-table th, .vigenere-table td {
    width: 30px;
    height: 30px;
    text-align: center;
    border: 1px solid #ddd;
    font-size: 14px;
    transition: all 0.2s ease;
}

.vigenere-table th {
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-weight: 700;
}

.vigenere-table td:first-child {
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-weight: 700;
}

.vigenere-table td.highlighted {
    background-color: rgba(102, 88, 211, 0.2);
    color: var(--primary-color);
    font-weight: 700;
    box-shadow: 0 0 8px rgba(102, 88, 211, 0.5);
    z-index: 2;
    position: relative;
}

.vigenere-table th.highlighted {
    background-color: rgba(102, 88, 211, 0.3);
    color: var(--primary-color);
    font-weight: 700;
    box-shadow: 0 0 5px rgba(102, 88, 211, 0.4);
    z-index: 1;
    position: relative;
}

.vigenere-key-length-info {
    margin-top: 10px;
    padding: 10px 15px;
    background-color: rgba(102, 88, 211, 0.1);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-color);
}

.vigenere-step {
    margin-bottom: 10px;
    padding: 10px;
    background-color: var(--bg-white);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.vigenere-step:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background-color: rgba(102, 88, 211, 0.05);
    border-color: var(--primary-color);
}

.vigenere-steps-container {
    max-height: 300px;
    overflow-y: auto;
    padding: 5px;
    margin: 10px 0;
    border-radius: 6px;
}

.vigenere-step .step-title {
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--primary-color);
}

.vigenere-step .step-content {
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .vigenere-key-display {
        background-color: #2a2a2a;
    }
    
    .vigenere-table th, .vigenere-table td:first-child {
        background-color: rgba(102, 88, 211, 0.2);
    }
    
    .vigenere-table td {
        border-color: #444;
    }
    
    .vigenere-key-length-info {
        background-color: rgba(102, 88, 211, 0.15);
    }
}

/* Mobile responsiveness for Vigenère */
@media (max-width: 768px) {
    .vigenere-table th, .vigenere-table td {
        width: 25px;
        height: 25px;
        font-size: 12px;
    }
    
    .expansion-display {
        font-size: 14px;
        letter-spacing: 1px;
    }
    
    .expansion-display .letter {
        width: 12px;
    }
}

@media (max-width: 480px) {
    .vigenere-table th, .vigenere-table td {
        width: 22px;
        height: 22px;
        font-size: 10px;
    }
    
    .expansion-display {
        font-size: 12px;
        letter-spacing: 0;
    }
    
    .expansion-display .letter {
        width: 10px;
    }
}