:root {
    --bg: #0f172a;
    --card: #1e293b;
    --accent: #38bdf8;
    --accent-hover: #7dd3fc;
    --text: #f8fafc;
    --text-secondary: #94a3b8;
    --border: #334155;
    --success: #4ade80;
    --warning: #facc15;
    --error: #f87171;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 2rem 1rem;
    background: var(--bg);
    color: var(--text);
    font-family: "Inter", system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    min-height: 100vh;
}

h1 {
    text-align: center;
    color: var(--accent);
    margin-bottom: 2.5rem;
    font-weight: 700;
    font-size: 2.2rem;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, var(--accent), var(--accent-hover));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.tree {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.node {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 800px;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.node:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
}

.node h2 {
    margin: 0 0 0.5rem 0;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.node h2::before {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent);
}

.description {
    margin: 0.75rem 0 1.25rem 0;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.links a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin: 0;
    color: var(--text);
    background-color: rgba(56, 189, 248, 0.1);
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.links a:hover {
    background-color: var(--accent);
    color: var(--bg);
    transform: translateY(-1px);
}

.links a::before {
    content: "↓";
    font-size: 0.8em;
}

.subtree {
    padding-top: 1.5rem;
    margin-top: 1.5rem;
    border-left: 3px solid var(--accent);
    margin-left: 1.5rem;
    padding-left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
}

.subtree::before {
    content: "";
    position: absolute;
    top: 0;
    left: -3px;
    width: 3px;
    height: 1.5rem;
    background: linear-gradient(to bottom, var(--accent), transparent);
}

.footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }

    .node {
        padding: 1.25rem;
    }

    .subtree {
        margin-left: 0.75rem;
        padding-left: 1rem;
    }

    .status-badge {
        top: 1rem;
        right: 1rem;
    }

    .badge.expiry {
        display: none;
    }
}

@media (max-width: 480px) {
    body {
        padding: 1.5rem 0.75rem;
    }

    h1 {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .node {
        padding: 1rem;
        border-radius: 12px;
    }

    .node h2 {
        font-size: 1.2rem;
    }

    .description {
        font-size: 0.9rem;
    }

    .links {
        gap: 0.5rem;
    }

    .links a {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }

    .badge {
        display: none;
    }
}

.badge.container {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    flex-wrap: nowrap;
}

.badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
}

.badge.success {
    background-color: var(--success);
    color: #022c22;
}

.badge.warning {
    background-color: var(--warning);
    color: #022c22;
}

.badge.error {
    background-color: var(--error);
    color: #022c22;
}

.badge.expiry {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}