/**
 * CSGOJ 分栏面板（叠在 csg_tokens 之上，全站复用）
 * 气质：细边、浅底、小圆角、紧凑字阶；禁渐变、玻璃拟态、实心色头。
 */

:root {
    --csg-panel-border: var(--csg-line, #dee2e6);
    --csg-panel-bg: var(--csg-surface, #fff);
    --csg-panel-muted: var(--csg-surface-muted, #f8f9fa);
    --csg-panel-text: var(--csg-text, #212529);
    --csg-panel-text-muted: var(--csg-text-muted, #6c757d);
    --csg-panel-accent: #2563eb;
    --csg-panel-accent-fg: #1d4ed8;
    --csg-panel-accent-pale: var(--csg-info-bg, #f0f6fc);
    --csg-panel-accent-bd: var(--csg-info-bd, #8ab0d4);
    --csg-panel-head-pad-y: 0.625rem;
    --csg-panel-head-pad-x: 0.875rem;
    --csg-panel-toolbar-pad: 0.5rem 0.875rem;
}

/* ---------- 分栏骨架 ---------- */

.csg-split {
    display: grid;
    min-width: 0;
    border: 1px solid var(--csg-panel-border);
    background: var(--csg-panel-bg);
    border-radius: var(--csg-radius, 2px);
    overflow: hidden;
}

.csg-split--2col {
    grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
}

.csg-split > .csg-panel + .csg-panel {
    border-left: 1px solid var(--csg-panel-border);
}

.csg-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    background: var(--csg-panel-bg);
}

.csg-panel--fill {
    min-height: calc(100vh - 7.5rem);
}

.csg-panel__head {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: var(--csg-panel-head-pad-y) var(--csg-panel-head-pad-x);
    border-bottom: 1px solid var(--csg-panel-border);
    background: var(--csg-panel-muted);
    flex-shrink: 0;
}

.csg-panel__head.is-hidden {
    display: none;
}

.csg-panel__icon {
    flex-shrink: 0;
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--csg-panel-border);
    border-radius: var(--csg-radius, 2px);
    background: var(--csg-panel-bg);
    color: var(--csg-panel-accent);
    font-size: 0.95rem;
}

.csg-panel__titles {
    min-width: 0;
    flex: 1;
}

.csg-panel__title {
    margin: 0;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--csg-panel-text);
    letter-spacing: 0.01em;
}

.csg-panel__meta {
    display: block;
    margin-top: 0.125rem;
    font-size: 0.6875rem;
    line-height: 1.2;
    color: var(--csg-panel-text-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.csg-panel__toolbar {
    padding: var(--csg-panel-toolbar-pad);
    border-bottom: 1px solid var(--csg-panel-border);
    flex-shrink: 0;
}

.csg-panel__search {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0.3125rem 0.5rem;
    border: 1px solid var(--csg-panel-border);
    border-radius: var(--csg-radius, 2px);
    background: var(--csg-panel-bg);
    transition: border-color var(--csg-dur-fast, 160ms) ease,
        box-shadow var(--csg-dur-fast, 160ms) ease;
}

.csg-panel__search:focus-within {
    border-color: var(--csg-panel-accent-bd);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.12);
}

.csg-panel__search > .bi {
    flex-shrink: 0;
    font-size: 0.8125rem;
    color: var(--csg-panel-text-muted);
}

.csg-panel__search-input {
    flex: 1;
    min-width: 0;
    border: 0;
    padding: 0;
    background: transparent;
    font-size: 0.8125rem;
    line-height: 1.35;
    color: var(--csg-panel-text);
    outline: none;
}

.csg-panel__search-input::placeholder {
    color: var(--csg-panel-text-muted);
    opacity: 0.85;
}

.csg-panel__scroll {
    flex: 1;
    min-height: 0;
    overflow: auto;
    overflow-x: hidden;
}

.csg-panel__body {
    padding: 0.875rem 1rem 1.25rem;
}

.csg-panel__empty,
.csg-panel__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 10rem;
    padding: 2rem 1rem;
    text-align: center;
    color: var(--csg-panel-text-muted);
    font-size: 0.8125rem;
}

.csg-panel__empty > .bi {
    font-size: 1.5rem;
    opacity: 0.45;
}

.csg-panel__hint {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.625rem;
    border: 1px solid var(--csg-panel-accent-bd);
    border-radius: var(--csg-radius, 2px);
    background: var(--csg-panel-accent-pale);
    color: var(--csg-info, #1e4b7a);
    font-size: 0.8125rem;
    line-height: 1.35;
}

@media (max-width: 991.98px) {
    .csg-split--2col {
        grid-template-columns: 1fr;
    }

    .csg-split > .csg-panel + .csg-panel {
        border-left: 0;
        border-top: 1px solid var(--csg-panel-border);
    }

    .csg-panel--fill {
        min-height: auto;
    }

    .csg-panel--list .csg-panel__scroll {
        max-height: 22rem;
    }
}