/* ui-demo — chọn ghế demo theo sơ đồ tổ chức (Fable 24/09/2026). Không viền: khối phân bằng nền chuyển màu nhẹ. */
.dn-the:has(.dvx){max-width:1180px}
.dvx{display:flex;flex-direction:column;gap:14px}
.dvx-ic{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.dvx-dau{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}
.dvx-dau h2{margin:0;font-size:22px}
.dvx-dau p{margin:2px 0 0;font-size:13.5px;color:var(--chu3)}
.dvx-tim{display:flex;align-items:center;gap:8px;background:var(--nen);border-radius:14px;padding:0 14px;color:var(--chu3);min-width:240px}
.dvx-tim input{border:0;background:transparent;font:inherit;font-size:14px;padding:11px 0;flex:1;outline:none;color:var(--chu)}
.dvx-goi-y{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.dvx-goi-y>span{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--canh);font-weight:600}
.dvx-goi-y>span .dvx-ic{width:15px;height:15px}
.dvx-goi-y button{border:0;border-radius:999px;background:linear-gradient(135deg,var(--nhan-nhat),var(--nen));color:var(--nhan);font:inherit;font-size:13px;font-weight:600;padding:8px 14px;cursor:pointer;min-height:36px}
.dvx-goi-y button:hover{background:var(--nhan);color:#fff}
.dvx-luoi{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;align-items:start}
.dvx-khoi{--k:var(--nhan);border-radius:22px;padding:12px;background:linear-gradient(180deg,color-mix(in srgb,var(--k) 11%,var(--the)),color-mix(in srgb,var(--k) 3%,var(--the)) 140px)}
.dvx-khoi.ls{--k:var(--tot)}.dvx-khoi.kh{--k:var(--nhan)}.dvx-khoi.hc{--k:var(--canh)}.dvx-khoi.ql{--k:var(--sop-lien-ket,var(--chu2))}
.dvx-khoi header{display:flex;align-items:center;gap:10px;padding:2px 2px 10px}
.dvx-khoi header b{display:block;font-size:14.5px}
.dvx-khoi header small{display:block;font-size:11.5px;color:var(--chu3)}
.dvx-khoi header em{margin-left:auto;font-style:normal;font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--k);background:var(--the);border-radius:999px;padding:1px 8px}
.dvx-khoi-ic{width:36px;height:36px;border-radius:12px;background:var(--k);color:#fff;display:inline-flex;align-items:center;justify-content:center;flex:none}
.dvx-to{margin-top:8px}
.dvx-to h5{margin:0 4px 5px;font-size:11.5px;font-weight:600;color:var(--chu3)}
.dvx-ghe{display:flex;align-items:center;gap:10px;width:100%;border:0;background:var(--the);border-radius:14px;padding:8px 10px;margin-bottom:5px;font:inherit;text-align:left;cursor:pointer;min-height:48px;box-shadow:0 1px 2px rgba(30,20,70,.05);transition:transform .12s,box-shadow .12s}
.dvx-ghe:hover{transform:translateY(-1px);box-shadow:0 8px 20px -12px rgba(30,20,70,.35)}
.dvx-ghe:hover .dvx-vao{opacity:1;color:var(--k)}
.dvx-tat{width:32px;height:32px;border-radius:10px;flex:none;display:inline-flex;align-items:center;justify-content:center;font-size:11.5px;font-weight:700;color:var(--k);background:color-mix(in srgb,var(--k) 14%,var(--the))}
.dvx-khoi .dvx-tat{color:var(--k)}
.dvx-ghe-chu{flex:1;min-width:0;display:flex;flex-direction:column}
.dvx-ghe-chu b{font-size:13px;line-height:1.3;color:var(--chu);font-weight:600}
.dvx-ghe-chu small{font-size:11.5px;color:var(--chu3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dvx-truong{font-style:normal;color:var(--canh);font-size:13px}
.dvx-vao{opacity:.3;color:var(--chu3);display:inline-flex}
.dvx-vao .dvx-ic{width:16px;height:16px}
.dvx-chan{display:flex;align-items:center;gap:6px;margin:0;font-size:12px;color:var(--chu3)}
.dvx-chan .dvx-ic{width:15px;height:15px}
@media (max-width:1100px){.dvx-luoi{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.dvx-luoi{grid-template-columns:1fr}.dvx-tim{min-width:0;width:100%}.dvx-dau h2{font-size:19px}}
/* Viên "tính năng → ghế": tên tính năng đậm, ghế nhỏ bên dưới (24/09/2026). */
.dvx-goi-y button{display:inline-flex;flex-direction:column;align-items:flex-start;gap:1px;border-radius:14px;padding:8px 14px;text-align:left;line-height:1.25}
.dvx-goi-y button b{font-size:13px;font-weight:650}
.dvx-goi-y button small{font-size:11.5px;font-weight:500;opacity:.75}
.dvx-goi-y button:hover small{opacity:.9}
/* lối tắt tính năng (Smile Design…, 28/09/2026): hàng riêng mỗi ca mẫu một nút, nền đậm hơn một nấc để người xem thấy ngay */
.dvx-smile>span{color:var(--nhan)}
.dvx-goi-y button.dvx-nhanh{background:linear-gradient(135deg,color-mix(in srgb,var(--nhan) 20%,var(--the)),var(--nhan-nhat))}
.dvx-goi-y button.dvx-nhanh small{color:inherit;opacity:.8}
.dvx-goi-y button.dvx-nhanh.dvx-thu{background:var(--nhan);color:#fff}
.dvx-goi-y button.dvx-nhanh.dvx-thu small{opacity:.9}