:root {
    --accent: var(--app-accent);
    --accent-strong: var(--app-accent-strong);
    --text-main: var(--app-text);
    --text-sub: var(--app-muted);
    --line-soft: var(--app-line-subtle);
    --card-bg: var(--app-card);
}

#main_bg {
    background-image: url(../assets/images/background/miku_gothic.webp);
    background-size: cover;
    background-position: center;
    position: fixed;
    min-height: 100vh;
    width: 100%;
    z-index: -1;
}

#panel {
    font-family: var(--app-font-serif);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    background: linear-gradient(135deg, rgba(255,255,255,0.72), rgba(245,252,249,0.62));
    border: 1px solid rgba(255,255,255,0.45);
}

.ss-head h1 { font-size: 22px; color: var(--text-main); margin-bottom: 6px; }
.ss-head p { font-size: 13px; color: var(--text-sub); margin-bottom: 16px; }

.ss-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 14px;
    align-items: start;
}

@media (max-width: 1100px) {
    .ss-layout { grid-template-columns: 1fr; }
}

.ss-col {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.ss-section {
    background: var(--card-bg);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    padding: 14px;
    backdrop-filter: blur(6px);
}

.ss-section h2 {
    font-size: 14px;
    color: var(--text-main);
    margin-bottom: 10px;
    padding-bottom: 7px;
    border-bottom: 1px solid var(--line-soft);
}

.ss-drop-zone {
    border: 1px dashed var(--app-line-strong);
    border-radius: 10px;
    padding: 24px 12px;
    text-align: center;
    background: linear-gradient(160deg, rgba(255,255,255,0.85), rgba(234,248,242,0.72));
    cursor: pointer;
    transition: all 0.24s ease;
    display: block;
}

.ss-drop-zone:hover {
    background: linear-gradient(160deg, rgba(255,255,255,0.94), rgba(227,246,239,0.78));
    border-color: var(--app-line-strong);
}

.ss-drop-zone p { font-size: 14px; color: var(--app-text); margin-bottom: 4px; }
.ss-drop-zone small { font-size: 12px; color: var(--text-sub); }

.ss-opt-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.ss-opt-row label {
    font-size: 13px;
    color: var(--text-main);
    min-width: 80px;
}

.ss-opt-row select,
.ss-opt-row input[type="number"] {
    padding: 6px 10px;
    border: 1px solid var(--line-soft);
    border-radius: 7px;
    font-size: 13px;
    background: var(--app-surface-input);
    font-family: var(--app-font-serif);
    flex: 1;
    max-width: 140px;
}

.ss-btn {
    padding: 9px 18px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-family: var(--app-font-serif);
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(35,126,102,0.28);
    width: 100%;
    margin-top: 8px;
}

.ss-btn:hover {
    background: linear-gradient(135deg, var(--app-accent-light), var(--app-accent-strong));
    transform: translateY(-1px);
}

.ss-btn:disabled {
    background: var(--app-line);
    cursor: not-allowed;
    transform: none;
}

.ss-btn-secondary {
    padding: 8px 16px;
    background: var(--app-accent-hover);
    color: white;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    font-size: 13px;
    font-family: var(--app-font-serif);
    transition: all 0.2s;
}

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

/* Sprite list */
.ss-sprite-list {
    max-height: 200px;
    overflow-y: auto;
    margin-top: 10px;
}

.ss-sprite-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 8px;
    background: rgba(255,255,255,0.7);
    border-radius: 6px;
    margin-bottom: 4px;
    font-size: 12px;
}

.ss-sprite-item img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 4px;
    background: var(--app-overlay-dark);
}

.ss-sprite-item .name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-main);
}

.ss-sprite-item .size {
    color: var(--text-sub);
    font-size: 11px;
    flex-shrink: 0;
}

.ss-sprite-item .remove {
    padding: 2px 8px;
    background: var(--app-error);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 10px;
}

/* Output canvas */
.ss-output-wrap {
    background: var(--app-overlay-dark);
    border-radius: 10px;
    padding: 10px;
    text-align: center;
    overflow: auto;
}

.ss-output-wrap canvas {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    image-rendering: pixelated;
}

.ss-output-info {
    font-size: 12px;
    color: var(--text-sub);
    margin-top: 8px;
}

.ss-json-box {
    background: var(--app-overlay-dark);
    color: var(--app-text-inverse);
    border-radius: 8px;
    padding: 10px;
    font-size: 11px;
    font-family: "Consolas", monospace;
    max-height: 180px;
    overflow-y: auto;
    white-space: pre-wrap;
    margin-top: 10px;
    line-height: 1.5;
}

.ss-action-row {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.ss-bg-toggle {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.ss-bg-toggle label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-main);
    cursor: pointer;
    background: rgba(255,255,255,0.6);
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid var(--line-soft);
}