#main_bg {
    background-image: url(../assets/images/background/miku_night.webp);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    position: fixed;
    min-height: 100vh;
    width: 100%;
    z-index: -1;
}

#panel {
    font-family: var(--app-font-serif);
    backdrop-filter: blur(2px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.ss-head {
    background: linear-gradient(135deg, var(--app-glass-strong), rgba(240, 255, 249, 0.72));
    border: 1px solid var(--app-line);
    border-radius: 14px;
    padding: 8px 14px;
    margin-bottom: 6px;
    box-shadow: var(--app-shadow-card);
    flex-shrink: 0;
}

.ss-head h1 {
    font-size: 18px;
    color: var(--app-text-heading);
    margin-bottom: 2px;
    letter-spacing: .4px;
}

.ss-head p {
    font-size: 12px;
    color: var(--app-muted);
}

.ss-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.ss-left-pane,
.ss-right-pane {
    width: 100%;
    min-height: 0;
    min-width: 0;
    background: var(--app-glass);
    border: 1px solid var(--app-line);
    border-radius: 14px;
    padding: 8px;
    box-shadow: var(--app-shadow-card);
    overflow: hidden;
    box-sizing: border-box;
}

.ss-left-pane {
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
}

.ss-right-pane {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ss-section-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--app-text-heading);
    margin-top: 4px;
    padding-bottom: 2px;
    border-bottom: 1px dashed var(--app-line);
}

.ss-control-grid3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
}

label {
    font-size: 12px;
    color: var(--app-text);
    display: flex;
    flex-direction: column;
    gap: 5px;
}

input,
select,
button {
    border: 1px solid var(--app-line);
    border-radius: 9px;
    padding: 8px 10px;
    background: var(--app-surface-input);
    font-size: 12px;
    box-sizing: border-box;
    transition: border-color .18s var(--app-ease), box-shadow .18s var(--app-ease), transform .18s var(--app-ease);
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--app-accent);
    box-shadow: 0 0 0 2px var(--app-accent-glow);
}

.ss-dropzone {
    min-height: 150px;
    border: 1px dashed var(--app-line-strong);
    border-radius: 12px;
    background: var(--app-overlay-dark);
    background-size: cover;
    background-position: center;
    display: grid;
    place-items: center;
    cursor: pointer;
    overflow: hidden;
    transition: border-color .18s var(--app-ease), box-shadow .18s var(--app-ease);
}

.ss-dropzone p {
    font-size: 13px;
    color: var(--app-text-inverse);
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.15);
    text-align: center;
    line-height: 1.4;
    pointer-events: none;
}

.ss-dropzone small {
    font-size: 11px;
    color: var(--app-text-inverse-muted);
    pointer-events: none;
}

.ss-dropzone.has-image p,
.ss-dropzone.has-image small {
    opacity: 0;
}

.ss-dropzone.dragover {
    border-color: var(--app-accent);
    box-shadow: 0 0 0 3px var(--app-accent-glow) inset;
}

.ss-dropzone + input[type="file"] {
    display: none;
}

.ss-cell-info {
    display: inline-block;
    padding: 8px 10px;
    border: 1px solid var(--app-line);
    border-radius: 9px;
    background: var(--app-card);
    color: var(--app-text);
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ss-frame-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ss-frame-row .ss-btn-ghost {
    flex-shrink: 0;
    cursor: pointer;
}

.ss-btn-ghost {
    background: var(--app-card);
    color: var(--app-text);
    cursor: pointer;
    padding: 8px 12px;
}

.ss-btn-ghost:hover {
    background: var(--app-accent-hover);
}

.ss-frame-input {
    flex: 1;
    min-width: 0;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 12px;
    color: var(--app-text);
    white-space: nowrap;
}

.ss-frame-input input[type="number"] {
    width: 64px;
    flex-shrink: 0;
    text-align: center;
}

.ss-tip {
    font-size: 11px;
    color: var(--app-muted);
}

.ss-action-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 2px;
}

.ss-btn {
    border: none;
    background: linear-gradient(135deg, var(--app-accent-strong), var(--app-accent));
    color: var(--app-text-inverse);
    cursor: pointer;
    padding: 9px 16px;
    font-weight: 600;
}

.ss-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--app-accent-glow);
}

.ss-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.ss-status {
    font-size: 12px;
    color: var(--app-muted);
}

.ss-preview {
    flex: 1;
    min-height: 0;
    background: var(--app-glass-strong);
    border: 1px solid var(--app-line);
    border-radius: var(--app-radius-md);
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow: hidden;
}

.ss-preview b {
    font-size: 12px;
    color: var(--app-text);
    font-weight: 600;
    flex-shrink: 0;
}

.ss-preview-wrap {
    flex: 1;
    min-height: 0;
    position: relative;
    background: var(--app-overlay-dark);
    border-radius: 9px;
    border: 1px solid var(--app-line-subtle);
    overflow: hidden;
}

.ss-preview-wrap canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

@media (max-width: 1280px) {
    .ss-layout { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
    .ss-control-grid3 { grid-template-columns: 1fr; }
}