:root {
    --bg: #0d1117;
    --bg-glow: #1a2540;
    --fg: #e6edf3;
    --muted: #7d8590;
    --accent: #58a6ff;
    --accent-2: #a371f7;
    --border: #30363d;
    --card: #161b22;
    --card-hover: #1c2333;
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, var(--bg-glow) 0%, transparent 60%),
        var(--bg);
    background-attachment: fixed;
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem;
    line-height: 1.5;
}

main {
    max-width: 560px;
    width: 100%;
    animation: rise 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

.bolt {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    display: inline-block;
    filter: drop-shadow(0 0 24px rgba(88, 166, 255, 0.4));
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--muted);
    font-size: 1.0625rem;
}

.nodes {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    margin-bottom: 3rem;
}

.node {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.875rem;
    text-decoration: none;
    color: var(--fg);
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.node:hover,
.node:focus-visible {
    background: var(--card-hover);
    border-color: var(--accent);
    transform: translateX(4px);
    outline: none;
}

.node:active {
    transform: translateX(2px) scale(0.995);
}

.node-flag {
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.node-info {
    flex-grow: 1;
    min-width: 0;
}

.node-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.125rem;
    letter-spacing: -0.01em;
}

.node-host {
    font-family: 'SF Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.8125rem;
    color: var(--muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.node-arrow {
    font-size: 1.5rem;
    color: var(--muted);
    transition: color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
}

.node:hover .node-arrow,
.node:focus-visible .node-arrow {
    color: var(--accent);
    transform: translateX(4px);
}

footer {
    text-align: center;
    color: var(--muted);
    font-size: 0.8125rem;
    font-family: 'SF Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    opacity: 0.6;
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.25rem;
    }

    .bolt {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .node {
        padding: 1rem 1.125rem;
        gap: 1rem;
    }

    .node-flag {
        font-size: 2rem;
    }

    .node-name {
        font-size: 1.0625rem;
    }

    .node-host {
        font-size: 0.75rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    main {
        animation: none;
    }

    .node,
    .node-arrow {
        transition: none;
    }

    .node:hover,
    .node:focus-visible {
        transform: none;
    }
}