:root {
    --color-bg: #fafafa;
    --color-bg-card: #ffffff;
    --color-text-primary: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-accent: #059669;
    --color-accent-hover: #047857;
    --color-border: #e2e8f0;
    --color-border-focus: #059669;
    --color-prefix: #059669;
    --color-comment: #64748b;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 6px 20px rgba(5, 150, 105, 0.12);
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    text-align: center;
    margin-bottom: 48px;
}

.title {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    gap: 2px;
}

.title-prefix {
    color: var(--color-prefix);
}

.cursor {
    color: var(--color-accent);
    animation: blink 1s step-end infinite;
}

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

.description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.search-section {
    margin-bottom: 48px;
}

.search-container {
    display: flex;
    align-items: center;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 4px;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.search-container:focus-within {
    border-color: var(--color-border-focus);
    box-shadow: var(--shadow-md), 0 0 0 3px rgba(5, 150, 105, 0.1);
}

.search-prefix {
    font-family: var(--font-mono);
    color: var(--color-prefix);
    padding: 0 12px;
    font-size: 1rem;
    user-select: none;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1rem;
    font-family: var(--font-mono);
    color: var(--color-text-primary);
    background: transparent;
    padding: 12px 0;
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-btn {
    background-color: var(--color-accent);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-btn:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
}

.search-btn:active {
    transform: translateY(0);
}

.search-hint {
    margin-top: 8px;
    padding-left: 4px;
}

.hint-text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-comment);
}

.cards-section {
    flex: 1;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.section-prefix {
    color: var(--color-prefix);
}

.cards-grid {
    column-count: 2;
    column-gap: 20px;
}

.card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    break-inside: avoid;
    margin-bottom: 20px;
}

.card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.card-icon img {
    width: 20px;
    height: 20px;
    filter: brightness(0) saturate(100%) invert(29%) sepia(89%) saturate(748%) hue-rotate(132deg) brightness(94%) contrast(93%);
}

.card:hover .card-icon img {
    filter: brightness(0) saturate(100%) invert(28%) sepia(84%) saturate(612%) hue-rotate(129deg) brightness(93%) contrast(91%);
}

.card-title {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.card-description {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 16px;
}

.card-footer {
    display: flex;
    justify-content: flex-end;
}

.card-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent);
    transition: all var(--transition-fast);
}

.card:hover .card-link {
    color: var(--color-accent-hover);
}

.footer {
    margin-top: 48px;
    text-align: center;
    padding: 20px 0;
}

.footer-text {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.comment {
    color: var(--color-comment);
}

.footer-link {
    color: var(--color-accent);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

@media (max-width: 600px) {
    .container {
        padding: 24px 16px;
    }
    
    .header {
        margin-bottom: 32px;
    }
    
    .title {
        font-size: 1.8rem;
    }
    
    .description {
        font-size: 0.9rem;
    }
    
    .search-section {
        margin-bottom: 32px;
    }
    
    .search-container {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .search-prefix {
        padding: 8px 10px;
    }
    
    .search-input {
        flex: 1 1 calc(100% - 40px);
        order: 2;
        padding: 10px 0;
    }
    
    .search-btn {
        flex: 1;
        order: 3;
        margin: 4px;
    }
    
    .cards-grid {
        column-count: 1;
        column-gap: 16px;
    }
    
    .card {
        padding: 20px;
        margin-bottom: 16px;
    }
    
    .footer {
        margin-top: 32px;
    }
}

@media (max-width: 400px) {
    .title {
        font-size: 1.5rem;
    }
    
    .description br {
        display: none;
    }
}