:root {
    --bg: #0f172a;
    --bg-soft: #111827;
    --panel: rgba(20, 28, 45, 0.88);
    --panel-border: rgba(255, 255, 255, 0.12);
    --text: #e5edf8;
    --muted: #9ab0c7;
    --good: #67e8f9;
    --warn: #fb7185;
    --btn: #1f2937;
    --btn-hover: #334155;
    --primary: #22d3ee;
    --primary-ink: #062b31;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Plus Jakarta Sans", "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(900px 500px at 85% 15%, rgba(34, 211, 238, 0.2), transparent 65%),
        radial-gradient(900px 500px at 10% 85%, rgba(251, 113, 133, 0.18), transparent 65%),
        linear-gradient(145deg, #020617, var(--bg));
    padding: 0 16px 40px;
}

.glow {
    position: fixed;
    width: 340px;
    height: 340px;
    border-radius: 999px;
    pointer-events: none;
    z-index: -1;
    filter: blur(2px);
    opacity: 0.65;
}

.glow-a {
    top: 2%;
    left: 6%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.42), transparent 70%);
}

.glow-b {
    bottom: 2%;
    right: 4%;
    background: radial-gradient(circle, rgba(251, 113, 133, 0.4), transparent 70%);
}

.site-header {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    letter-spacing: 0.04em;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.site-nav a {
    text-decoration: none;
    color: var(--muted);
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 8px 14px;
    transition: all 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--text);
    border-color: var(--panel-border);
    background: rgba(255, 255, 255, 0.06);
}

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

.hero {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 28px;
    padding: clamp(24px, 5vw, 42px);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.32);
}

.hero h1 {
    margin: 8px 0;
    font-size: clamp(1.8rem, 4.4vw, 3rem);
}

.hero p {
    margin: 0;
    color: var(--muted);
    max-width: 720px;
}

.eyebrow {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--good);
    font-size: 0.74rem;
}

.workspace {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.utility-strip {
    margin-top: 16px;
}

.utility-panel {
    display: none;
}

.utility-panel.active {
    display: block;
}

.util-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 10px;
}

.util-chip {
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--muted);
    font-weight: 600;
    cursor: pointer;
}

.util-chip:hover {
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.3);
}

.util-chip.active {
    background: linear-gradient(120deg, rgba(34, 211, 238, 0.22), rgba(251, 113, 133, 0.22));
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.34);
}

.panel {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    padding: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.24);
}

.panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.tree-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.panel h2 {
    margin: 0;
    font-size: 1.05rem;
}

.toggle-row {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--muted);
}

.toggle-row label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.mono-output {
    margin-top: 12px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(2, 6, 23, 0.62);
    color: var(--text);
    padding: 14px;
    min-height: 180px;
    overflow: auto;
    white-space: pre-wrap;
    line-height: 1.4;
    font-family: "JetBrains Mono", Consolas, monospace;
}

.import-row {
    margin-top: 12px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 10px;
}

.text-input {
    width: 100%;
    height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(2, 6, 23, 0.62);
    color: var(--text);
    padding: 0 12px;
    font-family: "JetBrains Mono", Consolas, monospace;
}

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

textarea {
    width: 100%;
    min-height: 340px;
    margin-top: 12px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(2, 6, 23, 0.62);
    color: var(--text);
    padding: 14px;
    resize: vertical;
    font-family: "JetBrains Mono", Consolas, monospace;
    line-height: 1.45;
}

.actions {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: var(--btn);
    color: var(--text);
    padding: 9px 14px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
}

.btn:hover {
    background: var(--btn-hover);
}

.btn-primary {
    border-color: transparent;
    background: var(--primary);
    color: var(--primary-ink);
}

.btn-subtle {
    background: rgba(255, 255, 255, 0.06);
}

.status {
    margin: 12px 0 0;
    color: var(--muted);
    min-height: 22px;
}

.status.success {
    color: var(--good);
}

.status.error {
    color: var(--warn);
}

.tree-panel {
    margin-top: 16px;
}

.tree-root {
    margin-top: 10px;
    border-top: 1px dashed rgba(255, 255, 255, 0.18);
    padding-top: 14px;
    font-family: "JetBrains Mono", Consolas, monospace;
    font-size: 0.92rem;
}

.tree-root details {
    margin: 6px 0;
    padding-left: 8px;
}

.tree-root summary {
    cursor: pointer;
    color: var(--good);
}

.node-line {
    color: var(--text);
    margin: 4px 0;
}

.node-key {
    color: #93c5fd;
}

.node-type {
    color: #f9a8d4;
}

.node-value {
    color: #bbf7d0;
}

@media (max-width: 900px) {
    .workspace {
        grid-template-columns: 1fr;
    }

    .import-row {
        grid-template-columns: 1fr;
    }

    textarea {
        min-height: 260px;
    }
}