:root {
    --bg-app: #1A0A14;
    --bg-panel: #2D1425;
    --bg-panel-hover: #3E1B32;
    --bg-input: #11050D;

    --border-color: #4A223B;
    --border-focus: #E84393;

    --text-main: #FDF2F8;
    --text-muted: #FBCFE8;

    --color-primary: #E84393;
    --color-primary-hover: #D81B60;
    --color-secondary: #FD79A8;
    --color-secondary-hover: #F8B4D9;

    --color-danger: #EF4444;
    --color-danger-bg: rgba(239, 68, 68, 0.1);
    --color-success: #10B981;
    --color-success-bg: rgba(16, 185, 129, 0.1);

    /* JSON Syntax Colors */
    --syn-key: #FD79A8;
    --syn-string: #A7F3D0;
    --syn-number: #FCD34D;
    --syn-bool: #C4B5FD;
    --syn-null: #9CA3AF;

    --font-ui: 'Inter', system-ui, sans-serif;
    --font-mono: 'Space Mono', monospace;

    --radius: 12px;
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--bg-app);
    color: var(--text-main);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Utilities */
.hidden {
    display: none !important;
}

.cursor-pointer {
    cursor: pointer;
}

/* Buttons & Inputs */
.btn {
    font-family: inherit;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-secondary {
    background: var(--bg-panel);
    color: var(--color-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-panel-hover);
    border-color: var(--color-secondary);
}

.btn-icon {
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: 6px;
    padding: 0.4rem;
    cursor: pointer;
    display: flex;
    transition: all 0.2s;
}

.btn-icon:hover {
    background: var(--bg-panel-hover);
    color: var(--color-primary);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    color: var(--text-muted);
}

#search-input {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 20px;
    padding: 0.4rem 1rem 0.4rem 2.25rem;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    outline: none;
    width: 250px;
    transition: all 0.2s;
}

#search-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(232, 67, 147, 0.2);
}

/* Layout */
.navbar {
    height: 64px;
    background: rgba(45, 20, 37, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    flex-shrink: 0;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-primary);
}

.brand h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #fff;
}

.actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.app-main {
    display: flex;
    flex: 1;
    overflow: hidden;
    padding: 1rem;
    gap: 1rem;
}

.pane {
    flex: 1;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.pane-header {
    height: 50px;
    padding: 0 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.2);
}

.pane-header h2 {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-secondary);
}

.status-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.status-badge.valid {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.status-badge.invalid {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

/* Left Pane */
.code-editor {
    flex: 1;
    width: 100%;
    background: var(--bg-input);
    border: none;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: 1.25rem;
    resize: none;
    outline: none;
    line-height: 1.5;
}

/* Right Pane */
.tree-container {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Tree Render Styles */
.tree-node {
    padding-left: 1.5rem;
    position: relative;
}

.tree-node.root {
    padding-left: 0.5rem;
}

.tree-toggle {
    position: absolute;
    left: 0.25rem;
    top: 0.2rem;
    cursor: pointer;
    color: var(--text-muted);
    width: 16px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.tree-toggle:hover {
    color: var(--color-primary);
}

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

.tree-key {
    color: var(--syn-key);
    cursor: pointer;
    border-radius: 3px;
    padding: 0 0.2rem;
    transition: background 0.1s;
}

.tree-value {
    cursor: pointer;
    border-radius: 3px;
    padding: 0 0.2rem;
    transition: background 0.1s;
    word-break: break-all;
}

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

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

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

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

.tree-key:hover,
.tree-value:hover {
    background: rgba(232, 67, 147, 0.15);
    box-shadow: 0 0 0 1px var(--color-primary);
}

.tree-active-match {
    background: rgba(232, 67, 147, 0.4) !important;
    color: #fff !important;
    box-shadow: 0 0 0 1px var(--color-primary) !important;
}

.tree-search-match {
    background: rgba(253, 121, 168, 0.2);
    border-bottom: 2px solid var(--color-primary);
}

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

/* Path Results Panel */
.path-results-panel {
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.3);
    padding: 1.25rem;
    flex-shrink: 0;
}

.path-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.path-header h3 {
    font-size: 0.9rem;
    color: var(--color-primary);
}

.selected-value {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    max-width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    background: var(--bg-input);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.path-group {
    margin-bottom: 0.75rem;
}

.path-group:last-child {
    margin-bottom: 0;
}

.path-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.path-input-group {
    display: flex;
}

.path-input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-right: none;
    color: var(--color-secondary);
    border-radius: 6px 0 0 6px;
    padding: 0.5rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    outline: none;
}

.path-input:focus {
    border-color: var(--border-focus);
}

.btn-copy {
    background: var(--bg-panel-hover);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0 0.75rem;
    border-radius: 0 6px 6px 0;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-copy:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--color-primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.9rem;
    box-shadow: 0 10px 25px rgba(232, 67, 147, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

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

@media (max-width: 768px) {
    .app-main {
        flex-direction: column;
    }

    .pane {
        flex: none;
        height: 50vh;
    }
}