#panel,
.settings-panel,
.preview-box,
.upload-area,
.progress-container {
    backdrop-filter: blur(6px);
}

: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);
    --card-bg: var(--app-card);
}

#main_bg {
    background-image: url(../assets/images/background/miku_3.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);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: linear-gradient(135deg, var(--app-glass), rgba(245, 252, 249, 0.62));
    border: 1px solid rgba(255, 255, 255, 0.45);
}

#panel h1 {
    font-size: 23px;
    color: var(--text-main);
    margin-bottom: 12px;
    letter-spacing: 0.2px;
    font-family: var(--app-font-serif);
}

.workbench-layout {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(400px, 5fr) minmax(360px, 5fr);
    gap: 14px;
}

.preview-column {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
}

.preview-box {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    padding: 10px;
    box-shadow: var(--app-shadow-card);
}

.column-title {
    font-size: 13px;
    color: var(--app-accent-strong);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-family: var(--app-font-serif);
}

.preview-area {
    flex: 1;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 8px;
    border: 1px dashed var(--app-line);
    overflow: hidden;
}

.preview-area img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 4px;
}

.preview-placeholder {
    font-size: 14px;
    color: var(--text-sub);
    font-family: var(--app-font-serif);
}

.preview-info {
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-sub);
    font-family: var(--app-font-serif);
    min-height: 20px;
}

.preview-info .size-reduced {
    color: var(--app-accent);
    font-weight: 500;
}

.preview-info .size-increased {
    color: #d97f3e;
    font-weight: 500;
}

.control-column {
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding-right: 4px;
}

.upload-section {
    position: relative;
    margin-bottom: 12px;
    flex-shrink: 0;
}

.upload-area {
    border: 1px dashed var(--app-line-strong);
    border-radius: 12px;
    padding: 28px 16px;
    text-align: center;
    background: linear-gradient(160deg, var(--app-glass-strong), rgba(234, 248, 242, 0.72));
    cursor: pointer;
    transition: all 0.24s ease;
}

.upload-area:hover {
    background: linear-gradient(160deg, var(--app-surface-input), rgba(227, 246, 239, 0.78));
    border-color: var(--app-accent);
    transform: translateY(-1px);
    box-shadow: var(--app-shadow-card);
}

.upload-area.drag-over {
    border-color: var(--app-accent);
    background: var(--app-accent-hover);
}

.upload-content svg {
    color: var(--app-accent);
    margin-bottom: 16px;
}

.upload-content p {
    font-size: 16px;
    color: var(--app-text);
    margin: 8px 0;
    font-family: var(--app-font-serif);
}

.upload-content .sub-text {
    font-size: 13px;
    color: var(--text-sub);
    font-family: var(--app-font-serif);
}

.settings-panel {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 14px 16px;
    margin-bottom: 12px;
    border: 1px solid var(--line-soft);
    flex-shrink: 0;
    box-shadow: var(--app-shadow-card);
}

.setting-group {
    margin-bottom: 12px;
}

.setting-group:last-child {
    margin-bottom: 0;
}

.setting-group label {
    display: block;
    font-size: 14px;
    color: var(--text-main);
    margin-bottom: 6px;
    font-family: var(--app-font-serif);
}

.setting-group select,
.setting-group input[type="range"] {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    font-size: 14px;
    background: var(--app-surface-input);
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: var(--app-font-serif);
}

.setting-group select:focus {
    outline: none;
    border-color: var(--app-accent);
    box-shadow: 0 0 0 3px var(--app-accent-hover);
}

.setting-group input[type="range"] {
    padding: 0;
    cursor: pointer;
}

.setting-group input[type="checkbox"] {
    accent-color: var(--app-accent);
}

.setting-group input[type="number"] {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    font-size: 14px;
    background: var(--app-surface-input);
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: var(--app-font-serif);
}

.setting-group input[type="number"]:focus {
    outline: none;
    border-color: var(--app-accent);
    box-shadow: 0 0 0 3px var(--app-accent-hover);
}

.setting-group input[type="number"]:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.setting-hint {
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-sub);
    font-family: var(--app-font-serif);
}

.mode-switch {
    margin-top: 4px;
    padding: 10px 0 0;
    border-top: 1px solid var(--line-soft);
}

.mode-switch label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-main);
    cursor: pointer;
    font-family: var(--app-font-serif);
}

.mode-switch input[type="checkbox"] {
    width: auto;
    accent-color: var(--app-accent);
}

.action-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-bottom: 8px;
    flex-shrink: 0;
}

.btn-primary,
.btn-secondary {
    padding: 12px 28px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--app-font-serif);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: white;
    box-shadow: var(--app-shadow-subtle);
}

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

.btn-primary:disabled {
    background: rgba(150, 150, 150, 0.6);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: rgba(104, 120, 130, 0.8);
    color: white;
}

.btn-secondary:hover {
    background: rgba(82, 98, 109, 0.92);
    transform: translateY(-1px);
}

.progress-container {
    background: var(--app-glass);
    border-radius: 12px;
    padding: 14px 16px;
    border: 1px solid var(--line-soft);
    flex-shrink: 0;
    box-shadow: var(--app-shadow-card);
}

.progress-bar {
    width: 100%;
    height: 24px;
    background: rgba(220, 220, 220, 0.5);
    border-radius: 12px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-strong));
    border-radius: 12px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    text-align: center;
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-sub);
    font-family: var(--app-font-serif);
}

@media (max-width: 1000px) {
    .workbench-layout {
        grid-template-columns: 1fr;
    }

    .preview-column {
        flex-direction: row;
        min-height: 250px;
    }
}