:root[data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --accent: #ec4899;
    --accent-hover: #db2777;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: rgba(255, 255, 255, 0.2);
    --table-header: rgba(30, 41, 59, 0.9);
    --table-row-hover: rgba(255, 255, 255, 0.05);
}

:root[data-theme="light"] {
    --bg-gradient: linear-gradient(135deg, #f0f9ff 0%, #e0e7ff 100%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.4);
    --text-main: #0f172a;
    --text-muted: #475569;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --accent: #db2777;
    --accent-hover: #be185d;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: rgba(0, 0, 0, 0.2);
    --table-header: rgba(241, 245, 249, 0.9);
    --table-row-hover: rgba(0, 0, 0, 0.03);
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 1rem;
    gap: 1rem;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    flex-shrink: 0;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 1.5rem;
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.btn-icon {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: background 0.2s;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
}

:root[data-theme="dark"] .moon-icon { display: none; }
:root[data-theme="light"] .sun-icon { display: none; }

/* Main Layout */
.main-layout {
    display: flex;
    flex: 1;
    gap: 1rem;
    overflow: hidden;
}

/* Left Panel */
.left-panel {
    width: 320px;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
    flex-shrink: 0;
}

.panel-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.panel-section h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.badge {
    background: var(--primary);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 99px;
    font-size: 0.8rem;
    font-weight: 600;
}

.upload-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 12px;
    padding: 2rem 1rem;
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.upload-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.upload-subtext {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.file-list-section {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.file-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-right: 0.5rem;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(150, 150, 150, 0.3);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(150, 150, 150, 0.5);
}

.empty-list-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 1rem;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.file-item.active {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.15);
}

.file-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.file-name {
    font-weight: 500;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.btn-delete-file {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
}

.btn-delete-file:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

/* Right Panel */
.right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.empty-state {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 1rem;
    color: var(--text-muted);
}

.empty-state.hidden {
    display: none;
}

.empty-icon {
    font-size: 4rem;
    opacity: 0.5;
}

.editor-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.editor-panel.hidden {
    display: none;
}

.action-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.active-file-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

/* Buttons */
.btn {
    font-family: inherit;
    font-weight: 500;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.2); }

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

/* Tabs */
.tabs-header {
    display: flex;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 1rem 1.5rem;
    font-weight: 600;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

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

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

.tabs-content {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.tab-pane {
    position: absolute;
    inset: 0;
    overflow-y: auto;
    padding: 1.5rem;
    display: none;
}

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

/* Form */
.meta-form {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.span-2 {
    grid-column: span 2;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
    padding-right: 2.5rem;
}
:root[data-theme="dark"] select.form-control {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
}
:root[data-theme="dark"] select.form-control option {
    background-color: var(--bg-gradient);
    color: #fff;
}


/* Table */
.table-actions {
    margin-bottom: 1rem;
    display: flex;
    justify-content: flex-end;
}

.table-container {
    overflow-x: auto;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    margin-bottom: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--glass-border);
}

th {
    background: var(--table-header);
    font-weight: 600;
    font-size: 0.9rem;
    position: sticky;
    top: 0;
    z-index: 10;
}

td {
    font-size: 0.9rem;
}

tr:hover td {
    background: var(--table-row-hover);
}

.col-checkbox {
    width: 40px;
    text-align: center;
}

.col-action {
    width: 80px;
    text-align: center;
}

table input[type="text"],
table input[type="number"] {
    width: 100%;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-main);
    padding: 0.4rem;
    border-radius: 4px;
    font-family: inherit;
}

table input[type="text"]:focus,
table input[type="number"]:focus,
table input[type="text"]:hover,
table input[type="number"]:hover {
    background: var(--input-bg);
    border-color: var(--input-border);
    outline: none;
}

/* Summary Bar */
.summary-bar {
    display: flex;
    gap: 2rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    font-size: 0.95rem;
}

/* XML Preview */
#tab-preview.active {
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

pre {
    flex: 1;
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 1.5rem;
    border-radius: 8px;
    overflow: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Footer */
footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* Utilities */
.text-right {
    text-align: right;
}

@media (max-width: 1024px) {
    .main-layout {
        flex-direction: column;
    }
    .left-panel {
        width: 100%;
        max-height: 400px;
    }
}