:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #10b981;
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --card-border: #e5e7eb;
    --text-primary: #181818;
    --text-secondary: #6b7280;
    --input-bg: #f9fafb;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --json-key: #0550ae;
    --json-string: #0a3069;
    --json-number: #0550ae;
    --json-boolean: #cf222e;
    --json-null: #6e7781;
    --tree-line: #d0d7de;
}

.dark-mode {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --card-border: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --input-bg: #0f172a;
    --json-key: #79c0ff;
    --json-string: #a5d6ff;
    --json-number: #79c0ff;
    --json-boolean: #ff7b72;
    --json-null: #8b949e;
    --tree-line: #444c56;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

/* Container */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
    border: 1.5px solid var(--card-border);
    border-radius: 10px;
    background: var(--card-bg);
    transition: background 0.3s, border-color 0.3s;
    margin-bottom: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 20px;
    padding: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    color: var(--text-primary);
    font-size: 1.1rem;
}

/* Client-side note */
.client-side-note {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-top: 10px;
    padding: 8px 16px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    display: inline-block;
}

.dark-mode .client-side-note {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
}

/* Topbar */
.topbar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1.2rem;
    margin-top: 1.2rem;
    padding: 0 20px;
}

.github-link svg,
#theme-icon svg {
    width: 28px !important;
    height: 28px !important;
    display: block;
    color: var(--text-primary);
    fill: var(--text-primary);
    transition: color 0.2s, fill 0.2s;
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.2em;
    border-radius: 50%;
    background: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}

.theme-toggle-btn:focus {
    outline: none;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.github-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

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

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab-btn {
    flex: 1;
    min-width: 120px;
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-secondary);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.tab-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Sections */
.input-section,
.output-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    transition: background 0.3s, border-color 0.3s;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.section-header h2 {
    font-size: 1.2rem;
    color: var(--text-primary);
}

.input-actions {
    display: flex;
    gap: 10px;
}

/* Input Row: drag & drop + textarea sejajar */
.input-row {
    display: flex;
    gap: 18px;
    align-items: stretch;
    margin-bottom: 0;
}

.file-drop-zone {
    min-width: 220px;
    max-width: 260px;
    flex: 0 0 220px;
    height: 100%;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.input-textarea-wrap {
    flex: 1 1 0%;
    display: flex;
    flex-direction: column;
}

.input-textarea-wrap textarea {
    min-height: 150px;
    height: 100%;
}

@media (max-width: 900px) {
    .input-row {
        flex-direction: column;
        gap: 12px;
    }
    .file-drop-zone {
        max-width: 100%;
        min-width: 0;
        width: 100%;
    }
    .input-textarea-wrap {
        width: 100%;
    }
}

/* File Drop Zone */
.file-drop-zone {
    border: 2px dashed var(--card-border);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
    margin-bottom: 15px;
}

.file-drop-zone:hover,
.file-drop-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.file-drop-zone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.drop-content {
    pointer-events: none;
}

.drop-content svg {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.drop-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Textarea */
textarea {
    width: 100%;
    min-height: 150px;
    padding: 15px;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9rem;
    resize: vertical;
    transition: border-color 0.3s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--primary-color);
    color: white;
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-secondary {
    background: var(--card-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--text-secondary);
    color: white;
}

.action-btn {
    width: 100%;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    transition: all 0.3s ease;
    margin-top: 15px;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.3);
}

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

/* Output Actions */
.output-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

/* Error Message */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error-color);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 20px;
    color: var(--error-color);
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
}

/* Status Message */
.status-message {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 500;
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

.status-message.success {
    background: var(--success-color);
    color: white;
}

.status-message.error {
    background: var(--error-color);
    color: white;
}

@keyframes slideUp {
    from { opacity: 0; transform: translate(-50%, 20px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* JSON Output */
.json-output {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 20px;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    max-height: 500px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

.json-output.minified {
    word-break: break-all;
}

/* Tree View */
.tree-view {
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 20px;
    overflow-x: auto;
    max-height: 600px;
    overflow-y: auto;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9rem;
}

.tree-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.tree-node {
    margin-left: 20px;
    position: relative;
}

.tree-node::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 0;
    height: 100%;
    border-left: 1px dashed var(--tree-line);
}

.tree-node:last-child::before {
    height: 12px;
}

.tree-item {
    position: relative;
    padding: 4px 0;
}

.tree-item::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 12px;
    width: 12px;
    border-top: 1px dashed var(--tree-line);
}

.tree-root {
    margin-left: 0;
}

.tree-root::before {
    display: none;
}

.tree-toggle {
    cursor: pointer;
    user-select: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

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

.tree-toggle .arrow {
    display: inline-block;
    width: 16px;
    height: 16px;
    text-align: center;
    transition: transform 0.2s;
}

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

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

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

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

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

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

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

.tree-count {
    color: var(--text-secondary);
    font-size: 0.85em;
    margin-left: 5px;
}

.tree-children {
    display: block;
}

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

/* Table View */
.table-view {
    overflow-x: auto;
    max-height: 600px;
    overflow-y: auto;
}

.table-info {
    margin-bottom: 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.json-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.json-table th,
.json-table td {
    padding: 12px 15px;
    text-align: left;
    border: 1px solid var(--card-border);
}

.json-table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 10;
}

.json-table tr:nth-child(even) {
    background: var(--input-bg);
}

.json-table tr:hover {
    background: rgba(99, 102, 241, 0.1);
}

.json-table td {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.json-table td:hover {
    white-space: normal;
    word-break: break-word;
}

.table-nested {
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: var(--input-bg);
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
}

.no-table-data {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

/* Footer */
footer {
    color: #181818 !important;
    background: transparent;
    text-align: center;
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3em;
    margin-top: 0.5em;
    margin-bottom: 20px;
}
footer a {
    color: var(--footer-link) !important;
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.2s;
}
footer .copyright {
    color: #222 !important;
    font-size: 0.98em;
    font-weight: 500;
    letter-spacing: 0.01em;
    margin-top: 0.5em;
    margin-bottom: 0;
    display: block;
}
.dark-mode footer {
    color: #e5e7eb !important;
    background: transparent;
}
.dark-mode footer a {
    color: #a5b4fc !important;
}
.dark-mode footer .copyright {
    color: #e5e7eb !important;
}

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        padding: 15px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .tabs {
        flex-direction: column;
    }

    .tab-btn {
        flex: none;
        width: 100%;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
}