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

:root {
    --bg: #0d0d0e;
    --surface: #13161e;
    --surface2: #1a1e29;
    --surface3: #222737;
    --border: #2a2f42;
    --border-light: #363d56;
    --text: #e2e6f3;
    --text-muted: #7a82a0;
    --text-dim: #4a5070;
    --accent: #5b8dee;
    --accent-glow: rgba(91, 141, 238, 0.18);
    --green: #4ade80;
    --green-glow: rgba(74, 222, 128, 0.15);
    --red: #f87171;
    --red-glow: rgba(248, 113, 113, 0.15);
    --yellow: #fbbf24;
    --purple: #a78bfa;
    --cyan: #22d3ee;
    --orange: #fb923c;
    --radius: 10px;
}

body {
    font-family: 'Syne', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 16px;
}


#json-tools {
    height:100vh;
    background-color: var(--surface2);
}

#json-tools #main{
    height:80vh
}

.logo-icon {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.logo span {
    color: var(--accent);
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--text);
    font-family: 'Syne', sans-serif;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.btn:hover {
    background: var(--surface3);
    border-color: var(--border-light);
}

.btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 16px var(--accent-glow);
}

.btn.primary:hover {
    filter: brightness(1.1);
}

.btn.danger {
    background: transparent;
    border-color: var(--red);
    color: var(--red);
}

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

.btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: var(--surface2);
    border: 1px solid var(--border);
    transition: all 0.3s;
    white-space: nowrap;
}

.status-bar.valid {
    border-color: var(--green);
    color: var(--green);
    background: var(--green-glow);
}

.status-bar.invalid {
    border-color: var(--red);
    color: var(--red);
    background: var(--red-glow);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
    flex-shrink: 0;
}

/* Main layout */
main {
    display: flex;
    flex: 1;
    overflow: hidden;
    gap: 0;
}

.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    flex-shrink: 0;
    gap: 8px;
}

.panel-header .ph-actions {
    display: flex;
    gap: 6px;
}

.ph-btn {
    padding: 3px 10px;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    font-family: 'Syne', sans-serif;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.ph-btn:hover {
    color: var(--text);
    border-color: var(--border-light);
    background: var(--surface2);
}

.divider {
    width: 4px;
    background: var(--border);
    cursor: col-resize;
    flex-shrink: 0;
    position: relative;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.divider:hover, .divider.dragging {
    background: var(--accent);
}

.divider::after {
    content: '';
    width: 2px;
    height: 32px;
    background: var(--text-dim);
    border-radius: 2px;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.divider:hover::after {
    opacity: 1;
    background: white;
}

/* Editor */
.editor-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
}

.line-numbers {
    width: 48px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 16px 0;
    overflow: hidden;
    flex-shrink: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-dim);
    text-align: right;
    padding-right: 10px;
    user-select: none;
}

textarea {
    flex: 1;
    background: var(--bg);
    color: var(--text);
    border: none;
    outline: none;
    resize: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    padding: 16px;
    tab-size: 2;
    caret-color: var(--accent);
    overflow: auto;
    white-space: pre;
    overflow-wrap: normal;
}

textarea::selection {
    background: rgba(91, 141, 238, 0.25);
}

textarea::placeholder {
    color: var(--text-dim);
}

/* Tree view */
.tree-view {
    flex: 1;
    overflow: auto;
    padding: 12px 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    background: var(--bg);
}

.tree-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-dim);
    gap: 12px;
    font-family: 'Syne', sans-serif;
    font-size: 14px;
}

.tree-empty svg {
    width: 40px;
    height: 40px;
    opacity: 0.3;
}

.tree-node {
    user-select: none;
}

.tree-row {
    display: flex;
    align-items: flex-start;
    padding: 2px 4px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.1s;
    gap: 4px;
    min-height: 24px;
}

.tree-row:hover {
    background: var(--surface2);
}

.tree-toggle {
    width: 16px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--text-dim);
    font-size: 10px;
    transition: transform 0.15s;
}

.tree-toggle.open {
    transform: rotate(90deg);
}

.tree-toggle.leaf {
    cursor: default;
    color: transparent;
}

.tree-key {
    color: var(--accent);
    font-weight: 500;
}

.tree-colon {
    color: var(--text-dim);
    margin: 0 4px;
}

.tree-val-string {
    color: var(--green);
}

.tree-val-number {
    color: var(--orange);
}

.tree-val-bool {
    color: var(--purple);
}

.tree-val-null {
    color: var(--text-dim);
    font-style: italic;
}

.tree-val-bracket {
    color: var(--text-muted);
}

.tree-count {
    color: var(--text-dim);
    font-size: 11px;
    margin-left: 6px;
}

.tree-children {
    padding-left: 20px;
}

.tree-children.hidden {
    display: none;
}

/* Error panel */
.error-panel {
    background: var(--red-glow);
    border-top: 1px solid var(--red);
    padding: 10px 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--red);
    flex-shrink: 0;
    display: none;
    gap: 8px;
    align-items: flex-start;
}

.error-panel.visible {
    display: flex;
}

.error-icon {
    flex-shrink: 0;
    margin-top: 1px;
}

/* Footer */
footer {
    height: 28px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 20px;
    font-size: 11px;
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
    flex-shrink: 0;
}

.footer-stat {
    display: flex;
    align-items: center;
    gap: 5px;
}

.footer-stat span {
    color: var(--text-muted);
}

footer .sep {
    width: 1px;
    height: 14px;
    background: var(--border);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--surface3);
    border: 1px solid var(--border-light);
    color: var(--text);
    padding: 9px 18px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Syne', sans-serif;
    opacity: 0;
    transition: all 0.25s;
    pointer-events: none;
    white-space: nowrap;
    z-index: 100;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

@media (max-width: 640px) {
    .logo-text {
        display: none;
    }

    .toolbar {
        gap: 4px;
    }

    .btn {
        padding: 5px 10px;
        font-size: 12px;
    }
}