/* ===== 群广场 ===== */
.search-add-bar {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 24px;
}
.search-add-bar input {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    background: var(--bg);
    color: var(--fg);
    transition: border-color 0.2s;
}
.search-add-bar input:focus {
    outline: none;
    border-color: var(--fg);
}
.add-btn {
    padding: 10px 18px;
    border: 2px solid var(--fg);
    border-radius: 4px;
    background: var(--fg);
    color: var(--bg);
    font-size: 14px;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.3s ease;
}
.add-btn:hover {
    background: var(--bg);
    color: var(--fg);
}

/* 加载状态 */
.loading-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--muted);
}
.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--fg);
    border-radius: 50%;
    margin: 0 auto 16px;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--muted);
}
.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}
.empty-state p {
    font-size: 16px;
    margin: 0;
}
.empty-hint {
    font-size: 13px !important;
    color: var(--border);
    margin-top: 8px !important;
}

/* 群卡片网格 */
.groups-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.group-card {
    border: 2px solid var(--border);
    border-radius: 6px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
    position: relative;
}
.group-card:hover {
    border-color: var(--fg);
    background: var(--hover-bg);
}
.group-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 10px;
    border: 2px solid var(--light-border);
}
.group-name {
    font-size: 15px;
    font-weight: bold;
    margin-bottom: 4px;
    word-break: break-all;
    line-height: 1.4;
}
.group-count {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 10px;
}
.group-count span {
    font-weight: bold;
    color: var(--fg);
}
.group-join-btn {
    display: inline-block;
    padding: 6px 24px;
    background: var(--fg);
    color: var(--bg);
    border: 2px solid var(--fg);
    border-radius: 4px;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.3s ease;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}
.group-join-btn:hover {
    background: var(--bg);
    color: var(--fg);
}
.group-time {
    font-size: 12px;
    color: var(--muted);
    margin-top: 4px;
}
.group-temp-badge {
    display: inline-block;
    font-size: 11px;
    padding: 1px 6px;
    border: 1px solid var(--fg);
    border-radius: 3px;
    margin-left: 4px;
    vertical-align: middle;
}
.group-qr-img {
    width: 100px;
    height: 100px;
    object-fit: contain;
    margin-top: 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: zoom-in;
    position: relative;
    z-index: 1;
}

/* 二维码弹窗 */
.qr-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.88);
    z-index: 9999;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: zoom-out;
}
.qr-modal.show {
    display: flex;
}
.qr-modal img {
    max-width: 85vw;
    max-height: 75vh;
    object-fit: contain;
    border: 2px solid #fff;
    border-radius: 6px;
}
.qr-modal-close {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    margin-top: 20px;
}

/* 移动端：列表样式 */
@media (max-width: 768px) {
    .groups-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .group-card {
        flex-direction: row;
        text-align: left;
        padding: 14px;
        gap: 14px;
        align-items: center;
    }
    .group-avatar {
        width: 48px;
        height: 48px;
        margin-bottom: 0;
        flex-shrink: 0;
    }
    .group-card-body {
        flex: 1;
        min-width: 0;
    }
    .group-name {
        font-size: 14px;
    }
    .group-join-btn {
        padding: 5px 16px;
        font-size: 13px;
        flex-shrink: 0;
        margin-bottom: 0;
    }
    .group-qr-img {
        width: 48px;
        height: 48px;
        margin-top: 0;
        flex-shrink: 0;
    }
    .group-count {
        margin-bottom: 4px;
    }
    .group-time {
        margin-top: 2px;
    }
}
@media (min-width: 769px) and (max-width: 1024px) {
    .groups-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}