/* CSS Variables for Theme Consistency */
:root {
    /* Color Palette */
    --color-primary: #667eea;
    --color-secondary: #764ba2;
    --color-text-primary: #2d3748;
    --color-text-secondary: #718096;
    --color-bg-light: #ffffff;
    --color-bg-subtle: #f8f9ff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    --gradient-bg-card: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-bg-subtle) 100%);
    
    /* Spacing */
    --spacing-sm: 20px;
    --spacing-md: 40px;
    --spacing-lg: 50px;
    --gap-sm: 6px;
    --gap-md: 18px;
    --gap-lg: 20px;
    
    /* Border Radius */
    --radius-sm: 2px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-circle: 50%;
    
    /* Transitions */
    --transition-standard: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-animation: 0.5s ease-out;
    
    /* Shadows */
    --shadow-sm: 0 4px 15px rgba(102, 126, 234, 0.3);
    --shadow-md: 0 12px 30px rgba(102, 126, 234, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
    background: var(--gradient-primary);
    color: #333;
    line-height: 1.6;
    padding: var(--spacing-sm);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Main Container */
main.dashboard {
    width: 100%;
    max-width: 1200px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg);
    animation: fadeIn 0.6s ease-out;
    contain: layout style paint;
}

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

/* Header */
h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    text-align: center;
}

h1::after {
    content: "";
    display: block;
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--radius-sm);
}

.subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: 0;
    font-weight: 400;
}

/* Service List Container */
#output {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--gap-lg);
    margin-top: var(--spacing-md);
}

/* Service Link */
.service-link {
    display: flex;
    align-items: center;
    gap: var(--gap-md);
    padding: 24px;
    background: var(--gradient-bg-card);
    border: 1px solid rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-standard);
    position: relative;
    overflow: hidden;
    animation: slideIn var(--transition-animation) backwards;
    will-change: transform, box-shadow;
    contain: layout style paint;
}

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

.service-link:nth-child(1) { animation-delay: 0.05s; }
.service-link:nth-child(2) { animation-delay: 0.1s; }
.service-link:nth-child(3) { animation-delay: 0.15s; }
.service-link:nth-child(4) { animation-delay: 0.2s; }
.service-link:nth-child(5) { animation-delay: 0.25s; }
.service-link:nth-child(6) { animation-delay: 0.3s; }
.service-link:nth-child(7) { animation-delay: 0.35s; }

.service-link::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
    opacity: 0;
    transition: opacity var(--transition-standard);
}

.service-link:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: rgba(102, 126, 234, 0.3);
}

.service-link:hover::before {
    opacity: 1;
}

.service-link:active {
    transform: translateY(-4px);
}

/* Service Icon */
.service-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-circle);
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 1;
    contain: layout style paint;
}

/* Service Info */
.service-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
    position: relative;
    z-index: 1;
}

.service-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.service-host {
    font-size: 0.875rem;
    color: var(--color-primary);
    font-weight: 500;
}

.service-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
    line-height: 1.5;
}

/* Focus Styles for Accessibility */
.service-link:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 3px;
}

.service-link:focus:not(:focus-visible) {
    outline: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    main.dashboard {
        padding: 30px var(--spacing-sm);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    #output {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    .service-link {
        padding: 18px;
    }
    
    .service-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
}