/* CodeChef Page Specific Styles - Cybersecurity/Hacker Aesthetic */

/* Custom Properties */
:root {
    --primary-green: #00ff41;
    --secondary-green: #00cc33;
    --accent-green: #39ff14;
    --dim-green: #00aa22;
    --dark-bg: #0a0a0a;
    --darker-bg: #000000;
    --terminal-bg: #1a1a1a;
    --terminal-border: #333333;
    --text-green: #00ff41;
    --text-light: #cccccc;
    --text-dim: #888888;
    --warning-red: #ff3333;
    --glow-green: rgba(0, 255, 65, 0.3);
    --glow-accent: rgba(57, 255, 20, 0.3);
}

/* Global Overrides for CodeChef */
body {
    background: var(--dark-bg);
    color: var(--text-light);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    padding: 120px 0 80px;
    min-height: 80vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Remove snowflake effect (body::before from global styles) */
body::before {
    display: none !important;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    z-index: 1;
}

.matrix-rain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.matrix-rain canvas {
    width: 100%;
    height: 100%;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
}

/* Remove container background box (rounded rectangle frame) */
.hero-section .container {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
}

.app-info {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

.app-icon-large {
    position: relative;
    flex-shrink: 0;
}

.app-icon-large img {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    box-shadow: 0 0 30px var(--glow-green);
    transition: all 0.3s ease;
}

.app-icon-large:hover img {
    box-shadow: 0 0 50px var(--glow-green);
    transform: scale(1.05);
}

.icon-glow {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: radial-gradient(circle, var(--glow-green) 0%, transparent 70%);
    border-radius: 34px;
    z-index: -1;
    animation: pulse 2s ease-in-out infinite alternate;
}

@keyframes pulse {
    0% { opacity: 0.5; transform: scale(0.95); }
    100% { opacity: 0.8; transform: scale(1.05); }
}

.app-details {
    text-align: left;
    flex: 1;
}

.app-details h1.app-title {
    margin-bottom: 15px;
    text-align: left;
}

.title-main {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-green);
    text-shadow: 0 0 20px var(--glow-green);
    line-height: 1;
}

.title-subtitle {
    display: block;
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-dim);
    margin-top: 5px;
    font-family: 'JetBrains Mono', monospace;
}

.app-tagline {
    font-size: 1.4rem;
    color: var(--primary-green);
    margin-bottom: 20px;
    font-weight: 600;
    text-shadow: 0 0 10px var(--glow-green);
    text-align: left;
}

.app-description {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 30px;
    max-width: 500px;
    text-align: left;
}

.app-actions {
    display: flex;
    gap: 20px;
    align-items: center;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 25px;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--secondary-green) 100%);
    color: var(--darker-bg);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px var(--glow-green);
    border: 1px solid var(--primary-green);
}

.download-btn:hover {
    background: linear-gradient(135deg, var(--secondary-green) 0%, var(--primary-green) 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--glow-green);
}

.download-btn.large {
    padding: 18px 35px;
    font-size: 1.1rem;
}

.price-tag {
    background: var(--terminal-bg);
    color: var(--primary-green);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    border: 1px solid var(--terminal-border);
}

/* Terminal Window */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.terminal-window {
    background: var(--terminal-bg);
    border-radius: 12px;
    border: 1px solid var(--terminal-border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 255, 65, 0.1);
    width: 100%;
    max-width: 550px;
    font-family: 'JetBrains Mono', monospace;
    overflow: hidden;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.terminal-window:hover {
    transform: translateY(-2px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0, 255, 65, 0.15);
}

.terminal-window::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.03) 0%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

.terminal-header {
    background: #2a2a2a;
    padding: 10px 15px;
    border-radius: 12px 12px 0 0;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--terminal-border);
    position: relative;
    z-index: 2;
}

.terminal-buttons {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    align-items: center;
}

.terminal-buttons .btn {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    transition: opacity 0.2s ease;
    flex-shrink: 0;
    padding: 0; /* <-- 添加这一行！这将消除过大的内边距。 */
}

.terminal-buttons .btn:hover {
    opacity: 0.8;
}

.terminal-buttons .red { background: #ff5f56; }
.terminal-buttons .yellow { background: #ffbd2e; }
.terminal-buttons .green { background: #27ca3f; }

.terminal-title {
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.3px;
}

.terminal-content {
    padding: 24px 20px;
    font-size: 0.95rem;
    text-align: left;
    line-height: 1.8;
    min-height: 200px;
    position: relative;
    z-index: 2;
}

.terminal-line {
    margin-bottom: 10px;
    color: var(--text-light);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    word-break: break-all;
}

.terminal-line:last-child {
    margin-bottom: 0;
}

.prompt {
    color: var(--primary-green);
    font-weight: 600;
    flex-shrink: 0;
    display: inline-block;
    text-shadow: 0 0 8px var(--glow-green);
    margin-right: 4px;
}

.command {
    color: var(--text-light);
    flex: 1;
    word-break: break-all;
}

.terminal-output {
    color: var(--primary-green);
    margin-bottom: 14px;
    margin-left: 0;
    padding-left: 0;
    font-weight: 500;
    text-align: left;
    text-shadow: 0 0 6px var(--glow-green);
    word-break: break-all;
    display: block;
    line-height: 1.6;
}

.terminal-line .terminal-output {
    margin-left: 0;
    margin-bottom: 0;
}

.cursor {
    color: var(--primary-green);
    animation: blink 1s infinite;
    display: inline-block;
    font-weight: 600;
    text-shadow: 0 0 8px var(--glow-green);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Demo Section */
.demo-section {
    padding: 80px 0;
    background: var(--darker-bg);
    border-top: 1px solid var(--terminal-border);
}

.demo-container {
    background: var(--terminal-bg);
    border-radius: 16px;
    padding: 40px;
    border: 1px solid var(--terminal-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    margin-top: 40px;
}

.demo-input, .demo-output {
    margin-bottom: 30px;
}

.demo-input label, .demo-output label {
    display: block;
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: 10px;
    font-family: 'JetBrains Mono', monospace;
}

.demo-input textarea, .demo-output textarea {
    width: 100%;
    height: 120px;
    background: var(--dark-bg);
    border: 1px solid var(--terminal-border);
    border-radius: 8px;
    padding: 15px;
    color: var(--text-light);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.demo-input textarea:focus, .demo-output textarea:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 10px var(--glow-green);
}

.demo-controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.demo-btn {
    background: var(--dark-bg);
    color: var(--text-light);
    border: 1px solid var(--terminal-border);
    padding: 12px 20px;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.demo-btn:hover {
    background: var(--terminal-border);
    color: var(--primary-green);
}

.demo-btn.active {
    background: var(--primary-green);
    color: var(--darker-bg);
    border-color: var(--primary-green);
    box-shadow: 0 0 15px var(--glow-green);
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background: var(--dark-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background: var(--terminal-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--terminal-border);
    text-align: left;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-green), transparent);
    transition: left 0.5s ease;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-green);
    box-shadow: 0 15px 40px rgba(0, 255, 65, 0.1);
    background: #252525 !important;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: none;
}

.feature-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Encoding Section */
.encoding-section {
    padding: 80px 0;
    background: var(--darker-bg);
    border-top: 1px solid var(--terminal-border);
}

.encoding-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.encoding-category {
    background: var(--terminal-bg);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--terminal-border);
}

.encoding-category h3 {
    color: var(--primary-green);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: left;
}

.encoding-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.encoding-tag {
    background: var(--dark-bg);
    color: var(--text-light);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace;
    border: 1px solid var(--terminal-border);
    transition: all 0.3s ease;
}

.encoding-tag:hover {
    background: var(--primary-green);
    color: var(--darker-bg);
    border-color: var(--primary-green);
}

/* Use Cases Section */
.use-cases-section {
    padding: 80px 0;
    background: var(--dark-bg);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.use-case-card {
    background: var(--terminal-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--terminal-border);
    text-align: left;
    transition: all 0.3s ease;
}

.use-case-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-green);
    box-shadow: 0 15px 40px rgba(0, 255, 65, 0.1);
    background: #252525 !important;
}

.use-case-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: none;
}

.use-case-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 15px;
}

.use-case-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* App Info Section */
.app-info-section {
    padding: 80px 0;
    background: var(--darker-bg);
    border-top: 1px solid var(--terminal-border);
}

.app-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.info-card {
    background: var(--terminal-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--terminal-border);
}

.info-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 20px;
}

.info-card ul {
    list-style: none;
    padding: 0;
}

.info-card li {
    color: var(--text-light);
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    padding-left: 20px;
}

.info-card li:last-child {
    border-bottom: none;
}

.info-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-green);
    font-weight: bold;
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    color: var(--text-light);
    text-align: center;
    border-top: 1px solid var(--terminal-border);
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-green);
    text-shadow: 0 0 20px var(--glow-green);
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-actions {
    margin-bottom: 30px;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.cta-features span {
    color: var(--primary-green);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: left;
    margin-bottom: 20px;
    color: var(--primary-green) !important;
    text-shadow: 0 0 20px var(--glow-green);
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: var(--primary-green) !important;
    background-clip: unset !important;
}

.section-subtitle {
    text-align: left;
    color: var(--text-dim);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

/* Navigation Brand Link Override */
.nav-brand a {
    text-decoration: none;
    color: var(--text-light);
}

.nav-brand a:hover {
    color: var(--primary-green);
    transition: color 0.3s ease;
}

/* Header Override */
.header {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--terminal-border);
}

.nav-link {
    color: var(--text-light);
}

.nav-link:hover {
    color: var(--primary-green);
}

/* Footer Override */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid var(--terminal-border);
}

.footer-title {
    color: var(--primary-green);
}

.contact-btn {
    background: var(--terminal-bg);
    color: var(--primary-green);
    border: 1px solid var(--terminal-border);
}

.contact-btn:hover {
    background: var(--primary-green);
    color: var(--darker-bg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        padding: 100px 0 60px;
        min-height: auto;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: left;
    }
    
    .app-info {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
        gap: 20px;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .terminal-window {
        max-width: 100%;
        margin: 0 auto;
    }
    
    .terminal-content {
        padding: 20px 15px;
        font-size: 0.85rem;
    }
    
    .terminal-header {
        padding: 12px 15px;
    }
    
    .terminal-title {
        font-size: 0.8rem;
    }
    
    .demo-controls {
        gap: 10px;
    }
    
    .demo-btn {
        padding: 10px 15px;
        font-size: 0.85rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .encoding-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .app-info-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 80px 0 40px;
    }
    
    .title-main {
        font-size: 2rem;
    }
    
    .app-tagline {
        font-size: 1.2rem;
    }
    
    .app-description {
        font-size: 1rem;
    }
    
    .download-btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .download-btn.large {
        padding: 15px 25px;
        font-size: 1rem;
    }
    
    .demo-container {
        padding: 25px;
    }
    
    .demo-input textarea, .demo-output textarea {
        height: 100px;
        font-size: 0.85rem;
    }
    
    .feature-card, .use-case-card, .info-card {
        padding: 25px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .terminal-content {
        padding: 18px 12px;
        font-size: 0.8rem;
        line-height: 1.6;
    }
    
    .terminal-header {
        padding: 10px 12px;
    }
    
    .terminal-buttons .btn {
        width: 10px;
        height: 10px;
    }
    
    .terminal-title {
        font-size: 0.75rem;
    }
    
    .prompt {
        font-size: 0.9em;
    }
    
    .terminal-output {
        font-size: 0.9em;
        margin-bottom: 12px;
    }
}

/* Animation Effects */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.use-case-card,
.info-card,
.encoding-category {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--terminal-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-green);
}



/* 隐藏动态生成的雪花 */
.snowflake {
    display: none !important;
}

/* 如果需要，也可以隐藏鼠标点击产生的波纹和冰晶效果 */
.water-ripple, .ice-crystal {
    display: none !important;
}

/* 1. 强制覆盖冰晶的闪烁动画，让其完全透明 */
@keyframes twinkle {
    0%, 50%, 100% { 
        opacity: 0 !important; 
        display: none !important;
        visibility: hidden !important;
        transform: scale(0) !important;
    }
}

/* 2. 针对性拦截 body 下没有类名且带有闪烁动画的 div (JS生成的冰晶) */
body > div:not([class]):not([id])[style*="twinkle"] {
    display: none !important;
}

/* 3. 同时隐藏全局背景中可能残留的 CSS 光晕效果 */
.hero-background::before,
.hero-background::after {
    display: none !important;
    content: none !important;
}

/* 4. 彻底隐藏漂浮的冰块背景 */
@keyframes floatIce {
    from, to { opacity: 0 !important; display: none !important; }
}