/* 关键渲染路径的CSS优先 */
:root {
    --primary-color: #1B3C59;    /* Navy Blue - represents reliability */
    --secondary-color: #F2E8DC;  /* Vintage Cream - historical feel */
    --accent-color: #B87333;     /* Copper - telegraph era */
    --alert-color: #E63946;      /* Signal Red - for important actions */
    --bg-color: #F1FAEE;         /* Off White - easy on eyes */
    --text-color: #2B2D42;       /* Dark Blue-Grey - readable */
    --border-radius: 8px;
    --transition-speed: 0.3s;
}

/* 添加hot-tag样式 */
.hot-tag {
    background-color: var(--alert-color);
    color: white;
    font-size: 0.5rem;
    padding: 2px 2px;
    border-radius: 4px;
    font-weight: 600;
    position: relative;
    top: -7px;
    margin-left: 2px;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    box-shadow: 0 1px 2px rgba(230, 57, 70, 0.2);
    animation: pulse-hot 2s infinite;
    line-height: 1.6;
}

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

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

html, body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.nav-container {
    background-color: var(--primary-color);
    padding: 0rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.translator-section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 3rem;
}

.converter-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* 非关键CSS可以放在这里 */
html {
    scroll-behavior: smooth;
}

/* Header Styles */
.header {
    background-color: var(--primary-color);
    padding: 1rem 0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.header h1 {
    color: var(--bg-color);
    margin: 0;
    font-size: 1.8rem;
}

.header .logo {
    width: 32px;
    height: 32px;
    animation: pulse 2s infinite;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-brand .nav-title {
    color: var(--bg-color);
    margin: 0;
    font-size: 1.8rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-brand .logo {
    width: 32px;
    height: 32px;
    animation: pulse 2s infinite;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--bg-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed);
    font-size: 1rem;
}

.nav-menu a:hover {
    color: var(--secondary-color);
}

/* 菜单按钮和下拉样式 */
.menu-btn {
    background: none;
    border: none;
    color: var(--bg-color);
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px;
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 22px;
    height: 18px;
}

.hamburger-icon span {
    display: block;
    height: 2px;
    width: 100%;
    background-color: var(--bg-color);
    transition: all 0.3s ease;
}

.menu-text {
    font-size: 14px;
    font-weight: 500;
}

.menu-panel {
    position: absolute;
    top: 100%;
    right: 0;
    width: 300px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    padding: 1rem;
    z-index: 1000;
    display: none;
}

.menu-dropdown.active .menu-panel {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

.menu-section {
    margin-bottom: 1.5rem;
}

.menu-section h3 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

.menu-section ul {
    list-style: none;
    padding: 0;
}

.menu-section li {
    margin: 0.5rem 0;
}

.menu-section a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-speed);
    display: block;
    padding: 0.5rem 0;
}

.menu-section a:hover {
    color: var(--accent-color);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--bg-color);
    margin: 5px 0;
    transition: var(--transition-speed);
}

/* Main Container Styles */
.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Translator Section */
.translator-section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 3rem;
}

.converter-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* 统一输入框样式 */
.text-input textarea,
.morse-output textarea {
    width: 100%;
    height: 200px;
    padding: 1rem;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    resize: none;
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    letter-spacing: 1px;
    margin: 1rem 0;
    background-color: white;
    transition: all var(--transition-speed);
    cursor: text;
}

.text-input textarea:hover,
.morse-output textarea:hover {
    border-color: var(--accent-color);
}

.text-input textarea:focus,
.morse-output textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(184, 115, 51, 0.2);
    outline: none;
}

.text-input textarea::placeholder,
.morse-output textarea::placeholder {
    color: #999;
    opacity: 0.8;
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
}

.button-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-speed);
    font-weight: 500;
}

.btn:hover {
    background-color: var(--accent-color);
}

.quick-examples {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.example {
    padding: 0.5rem 1rem;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color var(--transition-speed);
}

.example:hover {
    background-color: var(--accent-color);
    color: white;
}

/* Learning Section */
.learn-section {
    margin-bottom: 3rem;
}

.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.learning-card {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Reference Section */
.reference-section {
    margin-bottom: 3rem;
    background-color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.chart-intro {
    /* max-width: 800px;
    margin: 0 auto 2rem; */
    line-height: 1.7;
    color: var(--text-color);
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.reference-letters, .reference-numbers {
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.code-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.code-grid div {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 1rem 0.5rem;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.code-grid div:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 6px rgba(0,0,0,0.15);
}

.code-grid strong {
    color: var(--primary-color);
    font-size: 1.2rem;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.chart-note {
    margin-top: 3rem;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.chart-note h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.chart-note ul {
    list-style-type: none;
    padding-left: 0;
}

.chart-note li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.chart-note li:before {
    content: "•";
    color: var(--accent-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Footer Styles */
.footer {
    background-color: var(--primary-color);
    color: var(--bg-color);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: var(--bg-color);
    text-decoration: none;
    transition: color var(--transition-speed);
    line-height: 2;
}

.footer-section a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* Language Selector */
.language-selector select {
    padding: 0.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-color);
    background-color: transparent;
    color: var(--bg-color);
    cursor: pointer;
}

.language-selector select option {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
        flex-wrap: nowrap;
        justify-content: space-between;
    }
    
    .nav-brand {
        flex-basis: auto;
        margin-bottom: 0;
    }
    
    .nav-brand .nav-title {
        font-size: 1.4rem;
    }
    
    .logo {
        width: 28px;
        height: 28px;
    }
    
    .nav-menu {
        display: flex;
        flex-direction: row;
        width: auto;
    }
    
    .nav-menu .nav-item,
    .nav-menu .language-selector {
        display: none;
    }
    
    .menu-dropdown {
        display: block;
        position: relative;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .converter-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .button-group {
        justify-content: space-between;
        flex-wrap: wrap;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .text-input textarea,
    .morse-output textarea {
        height: 150px;
        font-size: 1rem;
        padding: 0.75rem;
    }
    
    .quick-examples {
        justify-content: center;
    }
    
    .example {
        font-size: 0.8rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .translator-section,
    .learn-section,
    .reference-section,
    .content-section {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    h1 {
        font-size: 1.6rem;
    }
    
    h2 {
        font-size: 1.4rem;
    }
    
    h3 {
        font-size: 1.2rem;
    }
    
    .reference-section {
        overflow-x: auto;
    }
    
    .code-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .code-grid div {
        padding: 0.75rem;
    }
    
    .code-grid strong {
        font-size: 1rem;
    }
    
    /* Improvements for letters page and alphabet display */
    .morse-alphabet-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 1rem;
    }
    
    .morse-letter-box {
        padding: 0.8rem 0.6rem;
    }
    
    .morse-letter-box h3 {
        font-size: 1.8rem;
    }
    
    .morse-letter-box .morse-code {
        font-size: 1.2rem;
    }
    
    .morse-letter-box .pronunciation {
        font-size: 0.8rem;
    }
    
    .alphabet-showcase {
        padding: 1rem;
        margin-top: 1rem;
        margin-bottom: 2rem;
    }
    
    .alphabet-heading {
        margin-bottom: 1rem;
    }
    
    .alphabet-intro {
        font-size: 0.9rem;
    }
    
    /* Letter detail pages */
    .letter-hero-section {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .letter-illustration svg {
        width: 200px;
        height: 200px;
    }
    
    .letter-details {
        width: 100%;
    }
    
    .learning-methods,
    .words-grid,
    .applications-content {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .word-item {
        padding: 0.75rem;
    }
    
    .timeline-event {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    /* Fix for translator elements on letter pages */
    .translator-section .converter-container {
        grid-template-columns: 1fr;
    }
    
    .translator-section .button-group {
        flex-wrap: wrap;
        justify-content: space-between;
    }
    
    .translator-section .btn {
        margin-bottom: 0.5rem;
        flex: 1 0 auto;
        min-width: 80px;
    }
}

/* Improved responsive styles for extra small screens */
@media (max-width: 480px) {
    .main-container {
        padding: 0 0.75rem;
        margin: 1rem auto;
    }
    
    .nav-brand .nav-title {
        font-size: 1.2rem;
    }
    
    .menu-panel {
        width: 280px;
        right: -10px;
    }
    
    .menu-text {
        display: none;
    }
    
    .hamburger-icon {
        width: 20px;
        height: 16px;
    }
    
    .menu-section h3 {
        font-size: 0.9rem;
    }
    
    .menu-section a {
        font-size: 0.85rem;
    }
    
    .morse-alphabet-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .morse-letter-box h3 {
        font-size: 1.6rem;
    }
    
    .morse-letter-box .morse-code {
        font-size: 1rem;
        margin: 0.5rem 0;
    }
    
    .letter-illustration svg {
        width: 150px;
        height: 150px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.5rem;
        font-size: 0.8rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn var(--transition-speed);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 修改输出动画效果，确保不会改变背景色 */
@keyframes outputHighlight {
    0% { border-color: var(--accent-color); }
    50% { border-color: var(--primary-color); }
    100% { border-color: var(--accent-color); }
}

.morse-output textarea.has-content {
    animation: outputHighlight 2s ease-in-out;
}

/* Content Sections */
.content-section {
    margin: 4rem 0;
    padding: 2rem 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.content-grid.reverse {
    direction: rtl;
}

.content-grid.reverse > * {
    direction: ltr;
}

.content-text h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.content-text ul {
    list-style-type: none;
    padding: 0;
}

.content-text ul li {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.content-text ul li:before {
    content: "•";
    color: var(--accent-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.content-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Features Section */
.features-section {
    margin: 4rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform var(--transition-speed);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.learn-more {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed);
}

.learn-more:hover {
    color: var(--primary-color);
}

/* FAQ Section */
.faq-section {
    margin: 4rem 0;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.faq-item {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.faq-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Responsive Design Updates */
@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .content-grid.reverse {
        direction: ltr;
    }

    .content-image {
        order: -1;
    }

    .feature-card,
    .faq-item {
        padding: 1.5rem;
    }
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    z-index: 1000;
}

/* Audio Visualizer */
.audio-visualizer {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    height: 30px;
    margin-left: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.audio-visualizer.active {
    opacity: 1;
}

.audio-visualizer .bar {
    width: 4px;
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 2px;
    transition: height 0.1s ease-in-out;
}

@keyframes soundBars {
    0% { height: 30%; }
    20% { height: 60%; }
    40% { height: 100%; }
    60% { height: 60%; }
    80% { height: 40%; }
    100% { height: 30%; }
}

.audio-visualizer.playing .bar {
    animation: soundBars 0.5s ease-in-out infinite;
}

.audio-visualizer.playing .bar:nth-child(1) { animation-delay: 0.0s; }
.audio-visualizer.playing .bar:nth-child(2) { animation-delay: 0.1s; }
.audio-visualizer.playing .bar:nth-child(3) { animation-delay: 0.2s; }
.audio-visualizer.playing .bar:nth-child(4) { animation-delay: 0.1s; }
.audio-visualizer.playing .bar:nth-child(5) { animation-delay: 0.0s; }

/* About Page Styles */
.about-hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, #4B7BF5 100%);
    color: white;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.about-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('/assets/dots-pattern.svg') repeat;
    opacity: 0.1;
    z-index: 1;
}

.about-hero h1,
.about-hero .tagline {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.about-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: white;
}

.about-hero .tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    color: white;
}

.about-description {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.about-description p {
    line-height: 1.6;
    margin-bottom: 1.5rem;
    color: #333;
}

.about-features {
    padding: 3rem 2rem;
    background-color: #f8f9fa;
}

.about-features .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.about-use-cases {
    padding: 3rem 2rem;
}

.about-use-cases .use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.use-case-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.use-case-card h3 {
    color: #FF4B4B;
    margin-bottom: 1rem;
}

.use-case-card ul {
    list-style-type: none;
    padding-left: 0;
}

.use-case-card li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.use-case-card li:before {
    content: "•";
    color: #FF4B4B;
    position: absolute;
    left: 0;
}

.about-morse-code,
.about-translator {
    padding: 3rem 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.about-morse-code {
    background-color: #f8f9fa;
}

.content-grid {
    display: grid;
    gap: 2rem;
}

.content-text h3 {
    color: #FF4B4B;
    margin: 2rem 0 1rem;
}

.content-text ul {
    list-style-type: none;
    padding-left: 0;
}

.content-text li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.content-text li:before {
    content: "•";
    color: #FF4B4B;
    position: absolute;
    left: 0;
}

@media (max-width: 768px) {
    .about-hero h1 {
        font-size: 2rem;
    }

    .about-hero .tagline {
        font-size: 1rem;
    }

    .about-features .features-grid,
    .about-use-cases .use-cases-grid {
        grid-template-columns: 1fr;
    }
}

.mobile-scroll-hint {
    display: none;
    text-align: center;
    margin: 1rem 0;
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.mobile-scroll-hint .arrow {
    display: inline-block;
    animation: bounce 1.5s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(0);
    }
    40% {
        transform: translateX(5px);
    }
    60% {
        transform: translateX(3px);
    }
}

@media (max-width: 768px) {
    .mobile-scroll-hint {
        display: block;
    }
    
    .reference-letters, .reference-numbers {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .code-grid {
        grid-template-columns: repeat(26, 70px);
        width: max-content;
        padding-bottom: 1rem;
    }
    
    .reference-numbers .code-grid {
        grid-template-columns: repeat(10, 70px);
    }
}

/* Binary Translator Specific Styles */
.text-display {
    margin: 10px 0;
    padding: 8px;
    background-color: #f5f5f5;
    border-radius: 4px;
    font-size: 0.9rem;
    min-height: 20px;
    word-break: break-all;
}

.representation-text {
    font-family: monospace;
    color: #1B3C59;
    font-weight: 500;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
    vertical-align: middle;
    margin-left: 10px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: #1B3C59;
}

input:focus + .slider {
    box-shadow: 0 0 1px #1B3C59;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.toggle-label {
    position: absolute;
    left: 70px;
    top: 8px;
    white-space: nowrap;
}

.binary-example {
    display: inline-block;
    cursor: pointer;
    margin: 5px;
    padding: 5px 12px;
    background-color: #f0eee6;
    border-radius: 16px;
    transition: all 0.2s ease;
    font-size: 0.85rem;
}

.binary-example:hover {
    background-color: #e2dfd4;
}

/* 语言选择器样式 */
.language-selector {
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
}

.language-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
}

.language-dot {
    width: 12px;
    height: 12px;
    background-color: var(--accent-color);
    border-radius: 50%;
    display: inline-block;
}

.language-support {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

#languageSelect {
    padding: 6px 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--bg-color-light);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

#languageSelect:hover {
    border-color: var(--accent-color);
}

#languageSelect:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(var(--accent-color-rgb), 0.2);
}