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

:root {
    --bg-color: #030305;
    --bg-secondary: #0a0a0f;
    --bg-tertiary: #12121a;
    --text-main: #ffffff;
    --text-muted: #9494a8;
    --primary: #00eaff;
    --secondary: #ff00c8;
    --accent: #7000ff;
    --success: #00ff88;
    --error: #ff4757;
    --warning: #ffa502;
    --glass-bg: rgba(20, 20, 25, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --card-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 25px;
    padding: 30px 20px;
    background: var(--glass-bg);
    border-radius: var(--card-radius);
    border: 1px solid var(--glass-border);
    position: relative;
}

.back-link {
    position: absolute;
    top: 20px;
    left: 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--primary);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header h1 i {
    margin-right: 12px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Toolbar */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
    padding: 15px 20px;
    background: var(--glass-bg);
    border-radius: var(--card-radius);
    border: 1px solid var(--glass-border);
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tool-group label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.tool-group select {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
    transition: var(--transition);
}

.tool-group select:focus {
    border-color: var(--primary);
}

.tool-group.buttons {
    display: flex;
    gap: 10px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn i {
    font-size: 0.85rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 234, 255, 0.3);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
}

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

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--glass-border);
}

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

.btn-danger {
    background: transparent;
    color: var(--error);
    border: 1px solid rgba(255, 71, 87, 0.3);
}

.btn-danger:hover {
    background: rgba(255, 71, 87, 0.1);
    border-color: var(--error);
}

/* Editor Container */
.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

/* Editor Panel */
.editor-panel {
    background: var(--glass-bg);
    border-radius: var(--card-radius);
    border: 1px solid var(--glass-border);
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--glass-border);
}

.panel-header h2 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.panel-header h2 i {
    margin-right: 8px;
    color: var(--primary);
}

.status {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

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

#input-editor {
    width: 100%;
    min-height: 400px;
    padding: 16px;
    background: transparent;
    border: none;
    outline: none;
    resize: vertical;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-main);
}

#input-editor::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.output-area {
    min-height: 400px;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Syntax Highlighting */
.json-key {
    color: var(--primary);
}

.json-string {
    color: var(--success);
}

.json-number {
    color: var(--secondary);
}

.json-boolean {
    color: var(--accent);
}

.json-null {
    color: var(--warning);
}

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

/* Info Panel */
.info-panel {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    padding: 20px;
    background: var(--glass-bg);
    border-radius: var(--card-radius);
    border: 1px solid var(--glass-border);
    margin-bottom: 20px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
}

.info-item i {
    color: var(--primary);
    font-size: 1rem;
}

.info-item strong {
    color: var(--text-main);
    margin-left: 4px;
}

/* Error Panel */
.error-panel {
    display: none;
    padding: 15px 20px;
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid rgba(255, 71, 87, 0.3);
    border-radius: var(--card-radius);
    margin-bottom: 20px;
}

.error-panel.show {
    display: block;
}

.error-content {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--error);
}

.error-content i {
    font-size: 1.2rem;
}

#error-message {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-tertiary);
    border: 1px solid var(--primary);
    border-radius: 10px;
    padding: 12px 24px;
    color: var(--text-main);
    font-size: 0.9rem;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

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

.toast.success {
    border-color: var(--success);
}

.toast.success i {
    color: var(--success);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .tool-group.buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }

    #input-editor,
    .output-area {
        min-height: 300px;
    }
}