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

#panel {
    padding: 12px;
    overflow: hidden;
}

.converter-shell {
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    gap: 10px;
    height: 100%;
    min-height: 0;
    color: var(--app-text);
}

.compact-header,
.toolbar,
.editor-panel,
.info-card {
    border: 1px solid var(--app-line-subtle);
    border-radius: var(--app-radius-lg);
    background: var(--app-glass-strong);
    box-shadow: var(--app-shadow-card);
    backdrop-filter: blur(10px);
}

.compact-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
}

.header-main {
    min-width: 0;
}

.eyebrow {
    margin-bottom: 4px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--app-accent-strong);
    text-transform: uppercase;
}

.compact-header h1 {
    margin: 0;
    font-size: 24px;
    color: var(--app-text-heading);
}

.status-inline {
    min-width: 250px;
    max-width: 360px;
    padding: 10px 12px;
    border-radius: 14px;
    background: var(--app-glass);
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.status-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--app-accent-strong);
    text-transform: uppercase;
}

#convertStatus {
    font-size: 16px;
    color: var(--app-text);
}

#convertMeta {
    font-size: 12px;
    line-height: 1.45;
    color: var(--app-muted);
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
}

.toolbar-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.direction-switch {
    display: inline-flex;
    padding: 3px;
    border-radius: 12px;
    background: var(--app-glass);
    gap: 4px;
}

.direction-btn {
    border: none;
    border-radius: 10px;
    padding: 8px 12px;
    background: transparent;
    color: var(--app-text);
    font-size: 13px;
    font-weight: 700;
    font-family: var(--app-font-serif);
    cursor: pointer;
    transition: background-color 0.18s var(--app-ease), color 0.18s var(--app-ease), box-shadow 0.18s var(--app-ease);
}

.direction-btn.active {
    color: var(--app-text-inverse);
    background: linear-gradient(135deg, var(--app-accent-strong), var(--app-accent));
    box-shadow: var(--app-accent-glow);
}

.btn-primary,
.btn-secondary {
    border: none;
    border-radius: var(--app-radius-sm);
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--app-font-serif);
    cursor: pointer;
    transition: transform 0.18s var(--app-ease), box-shadow 0.18s var(--app-ease), background-color 0.18s var(--app-ease);
}

.btn-primary {
    color: var(--app-text-inverse);
    background: linear-gradient(135deg, var(--app-accent-strong), var(--app-accent));
}

.btn-secondary {
    color: var(--app-text);
    background: var(--app-glass);
}

.btn-secondary.danger {
    color: var(--app-text-inverse);
    background: linear-gradient(135deg, var(--app-error), #991b1b);
}

.btn-primary:hover,
.btn-secondary:hover {
    transform: translateY(-1px);
    box-shadow: var(--app-shadow-card);
}

.workspace {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    min-height: 0;
    overflow: hidden;
}

.editor-panel {
    padding: 12px;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 8px;
    min-width: 0;
}

.panel-header > div {
    min-width: 0;
}

.panel-header h2 {
    margin: 2px 0 0;
    font-size: 18px;
    color: var(--app-text-heading);
}

.panel-tag {
    display: inline-flex;
    align-items: center;
    min-height: 22px;
    padding: 0 9px;
    border-radius: 999px;
    background: var(--app-accent-hover);
    color: var(--app-accent-strong);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.panel-meta {
    flex-shrink: 0;
    white-space: nowrap;
    font-size: 11px;
    color: var(--app-muted);
    text-align: right;
}

.editor-panel textarea {
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
    flex: 1;
    min-height: 0;
    padding: 14px;
    border: 1px solid var(--app-line-strong);
    border-radius: 14px;
    background: var(--app-surface-input);
    color: var(--app-text);
    font-size: 13px;
    line-height: 1.6;
    font-family: Consolas, "Courier New", monospace;
    resize: none;
    outline: none;
    overflow: auto;
}

.editor-panel textarea:focus {
    border-color: var(--app-accent);
    box-shadow: 0 0 0 4px var(--app-accent-glow);
}

.insight-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    min-height: 0;
}

.info-card {
    padding: 10px 12px;
    min-height: 0;
    overflow: hidden;
}

.info-head h3 {
    margin: 0 0 8px;
    font-size: 14px;
    color: var(--app-text-heading);
}

.info-list,
.rule-list {
    margin: 0;
    padding-left: 18px;
    max-height: 78px;
    overflow: auto;
    color: var(--app-text);
    font-size: 12px;
    line-height: 1.55;
}

.info-list li + li,
.rule-list li + li {
    margin-top: 4px;
}

.empty-note {
    color: var(--app-muted);
}

@media (max-width: 1180px) {
    #panel {
        overflow-y: auto;
    }

    .converter-shell {
        grid-template-rows: auto auto auto auto;
        height: auto;
    }

    .compact-header,
    .toolbar,
    .workspace,
    .insight-grid {
        display: grid;
        grid-template-columns: 1fr;
    }

    .status-inline {
        max-width: none;
    }

    .workspace {
        min-height: auto;
    }

    .editor-panel textarea {
        min-height: 320px;
    }
}

@media (max-width: 860px) {
    #panel {
        padding: 10px;
    }

    .compact-header {
        padding: 10px 12px;
    }

    .compact-header h1 {
        font-size: 20px;
    }

    .toolbar-actions,
    .toolbar-group,
    .direction-switch {
        width: 100%;
    }

    .direction-btn,
    .toolbar-group button {
        flex: 1;
    }

    .info-list,
    .rule-list {
        max-height: none;
    }

    .editor-panel textarea {
        min-height: 260px;
    }
}