:root {
    --color-brand: #e30613;
    --color-bg: #0e1116;
    --color-surface: #141922;
    --color-border: #232a34;
    --color-text: #e5e7eb;
    --color-muted: #9ca3af;
    --color-brand-dim: rgba(227, 6, 19, 0.12);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 12px;

    --space-1: .25rem;
    --space-2: .5rem;
    --space-3: .75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;

    --text-xs: .75rem;
    --text-sm: .875rem;
    --text-md: 1rem;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
    transition: box-shadow .25s ease;
    min-width: 40%;
    max-width: 80%;
}

.card:hover {
    box-shadow: 0 8px 32px var(--color-brand-dim);
}

.section-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--color-brand);
    letter-spacing: 0.09em;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.card h2 {
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--color-brand);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.09em;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-brand);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}

.drop-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color .2s, background .2s, color .2s;
    font-size: var(--text-sm);
    color: var(--color-muted);
    user-select: none;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--color-brand);
    background: var(--color-brand-dim);
    color: var(--color-brand);
}

.drop-zone svg {
    margin-bottom: var(--space-3);
    color: var(--color-muted);
    transition: color .2s;
}

.drop-zone:hover svg,
.drop-zone.dragover svg {
    color: var(--color-brand);
}

.drop-zone p {
    color: inherit;
    font-size: var(--text-sm);
}

.drop-zone span.pick {
    color: var(--color-brand);
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
}

.drop-zone .filename {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-brand);
    font-weight: 600;
}

.drop-zone input[type="file"],
#file-input {
    display: none;
}

body.dragging-active {
    cursor: no-drop !important;
}

body.dragging-active .drop-zone {
    cursor: move !important;
}

.file-list {
    margin-top: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    max-width: 100%;
    min-width: 33%;
    place-self: anchor-center;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.file-item .name {
    width: 94%;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    color: var(--color-text);
    font-weight: 600;
}

.file-item .size {
    color: var(--color-muted);
    font-size: var(--text-xs);
}

.file-status {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.badge {
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 999px;
    font-weight: 700;
}

.badge-ok {
    background: var(--color-success-dim-2);
    color: var(--color-success-light);
}

.badge-warn {
    background: var(--color-warning-dim);
    color: var(--color-warning);
}

.format-badge {
    display: inline-block;
    background: var(--color-bg);
    color: var(--color-muted);
    border: 1px solid var(--color-border);
    font-size: var(--text-xs);
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-left: var(--space-2);
    vertical-align: middle;
}

.format-badge.detected {
    border-color: var(--color-brand);
    color: var(--color-brand);
    background: var(--color-brand-dim);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

@media (max-width: 600px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

.row {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-5);
    flex-wrap: wrap;
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    flex: 1;
    min-width: 25%;
}

.field-group label {
    margin-bottom: 0;
}

.hint {
    font-size: var(--text-xs);
    color: var(--color-muted);
    margin-top: 2px;
}

label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-1);
}

select,
input[type="text"],
input[type="number"] {
    width: 100%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    outline: none;
    transition: border-color .2s;
    appearance: none;
    -webkit-appearance: none;

    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.25rem center;
    padding-right: 2.5rem;
}

#fallback {
    width: auto;
}

select:focus,
input:focus {
    border-color: var(--color-brand);
}

select option {
    background: var(--color-surface);
}

.toggle-group {
    display: flex;
    gap: var(--space-2);
}

.toggle-btn {
    flex: 1;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-muted);
    cursor: pointer;
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all .2s;
}

.toggle-btn.active {
    background: var(--color-brand-dim);
    border-color: var(--color-brand);
    color: var(--color-brand);
    font-weight: 700;
}

.checkbox-row {
    padding-top: 0.3rem;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-muted);
    cursor: pointer;
    margin-bottom: var(--space-4);
}

.checkbox-row input {
    width: auto;
    accent-color: var(--color-brand);
}

.actions {
    display: flex;
    gap: var(--space-3);
    align-items: center;
    flex-wrap: wrap;
    margin-top: var(--space-5);
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    font-size: var(--text-sm);
    font-weight: 700;
    transition: all .15s;
}

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

.btn-primary:hover {
    background: var(--color-brand-darker);
    box-shadow: 0 4px 12px var(--color-brand-dim-hover);
}

.btn-primary:disabled {
    background: var(--color-border);
    color: var(--color-muted);
    cursor: not-allowed;
}

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

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

#status {
    font-size: var(--text-sm);
    color: var(--color-muted);
    display: flex;
    justify-self: center;
}

#status.ok {
    color: var(--color-success-light);
}

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

.tag {
    display: inline-block;
    background: var(--color-brand-dim);
    color: var(--color-brand);
    font-size: var(--text-xs);
    font-weight: 700;
    padding: 2px 10px;
    border-radius: var(--radius-sm);
}

.messages {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.msg {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    display: flex;
    gap: var(--space-2);
    align-items: flex-start;
}

.msg-warn {
    background: var(--color-warning-dim);
    color: var(--color-warning);
    border-left: 3px solid var(--color-warning-border);
}

.msg-info {
    background: var(--color-info-dim);
    color: var(--color-info);
    border-left: 3px solid var(--color-info-border);
}

.msg-success {
    background: var(--color-success-dim);
    color: var(--color-success-light);
    border-left: 3px solid var(--color-success-border);
}

.msg-error {
    background: var(--color-error-dim);
    color: var(--color-error);
    border-left: 3px solid var(--color-error-border);
}

.stats {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-bottom: var(--space-4);
}

.stat {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    min-width: 110px;
}

.stat .val {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-brand);
}

.stat .lbl {
    font-size: var(--text-xs);
    color: var(--color-muted);
    margin-top: 2px;
}

.preview-wrap {
    overflow: auto;
    max-height: 350px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    margin-top: var(--space-4);
    scrollbar-color: var(--color-border) var(--color-bg);
    text-align: -webkit-center;
}

.preview-wrap::-webkit-scrollbar {
    height: 6px;
    width: 6px;
}

.preview-wrap::-webkit-scrollbar-track {
    background: var(--color-bg);
}

.preview-wrap::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 999px;
}

.preview-wrap::-webkit-scrollbar-thumb:hover {
    background: var(--color-brand);
}

table {
    min-height: max-content;
    min-width: max-content;
    border-collapse: collapse;
    font-size: var(--text-xs);
    font-family: ui-monospace, "Courier New", monospace;
}

th {
    background: var(--color-bg);
    color: var(--color-brand);
    text-align: left;
    padding: var(--space-2) var(--space-3);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
    position: sticky;
    top: 0;
    font-weight: 700;
}

td {
    padding: 5px var(--space-3);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    white-space: nowrap;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--color-overlay-light-2);
}

td.zero {
    color: var(--color-muted);
}

.result-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

#step-config,
#step-result {
    display: none;
}