/* ---------- Vòng ký ức ---------- */
.ring{position:relative;isolation:isolate;height:clamp(480px,58vw,700px);border:1px solid var(--line);border-radius:8px;overflow:hidden;background:radial-gradient(ellipse 55% 50% at 50% 50%,#F3E3C2 0,#FBF4E6 70%);touch-action:pan-y;user-select:none;-webkit-user-select:none;outline:none}
.ring:focus-visible{box-shadow:0 0 0 2px var(--blue)}
.ring-tiles{position:absolute;inset:0}
.rt{position:absolute;left:0;top:0;width:clamp(118px,15vw,210px);aspect-ratio:3/2;padding:0;border:0;background:#111;cursor:pointer;transform-origin:center;will-change:transform;filter:grayscale(.35) brightness(.9);transition:filter .6s var(--ease,ease),box-shadow .6s;box-shadow:0 10px 26px rgba(60,40,15,.25)}
.rt canvas{display:block;width:100%;height:100%;pointer-events:none}
.ring.has-hover .rt{filter:grayscale(1) sepia(.15) opacity(.38)}
.ring.has-hover .rt.on{filter:none;box-shadow:0 0 0 1px rgba(154,110,34,.6),0 24px 50px rgba(60,40,15,.35),0 0 60px rgba(232,184,102,.45)}
.rt:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
.rt-vid{position:absolute;left:6px;bottom:6px;display:inline-flex;align-items:center;gap:4px;font:600 10.5px var(--f-body);color:#fff;background:rgba(0,0,0,.55);padding:2px 6px;border-radius:3px}
.rt-y{position:absolute;right:6px;top:5px;font:600 10.5px var(--f-body);color:rgba(255,255,255,.85);text-shadow:0 1px 4px rgba(0,0,0,.8)}
.ring-center{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;pointer-events:none;color:#2B241C}
.ring-center .logo{width:34px;height:auto}
.ring-center b{font-weight:300;font-size:clamp(20px,2.6vw,30px);letter-spacing:-.03em}
.ring-center small{font:600 10.5px var(--f-body);letter-spacing:.06em;text-transform:uppercase;color:#7A6E5E}
.ring-bar{position:absolute;left:0;right:0;bottom:0;display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;padding:14px 18px;border-top:1px solid rgba(43,36,28,.08);background:linear-gradient(rgba(251,244,230,0),rgba(251,244,230,.92));font:600 11.0px var(--f-body);letter-spacing:.05em;text-transform:uppercase;color:#7A6E5E;z-index:400;pointer-events:none}
.rc-t{color:#2B241C;text-align:center;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ring-ctl{position:absolute;right:14px;top:14px;display:flex;gap:6px;z-index:400}
.ring-ctl button{width:34px;height:34px;border-radius:4px;border:1px solid rgba(43,36,28,.18);background:rgba(251,246,236,.6);color:#2B241C;font-size:20px;cursor:pointer;line-height:1}
.ring-ctl button:hover{background:#B8862F;border-color:#B8862F}
.ring-note{margin-top:10px;font:600 10.5px var(--f-body);letter-spacing:.05em;text-transform:uppercase;color:var(--ink-soft)}
@media (max-width:640px){.ring{height:480px}.rt{width:104px}.ring-center b{font-size:18px}.ring-bar{grid-template-columns:auto 1fr;font-size:10px}.rc-y{display:none}}
.lb{position:fixed;inset:0;z-index:90;display:grid;place-items:center;padding:16px}
.lb[hidden]{display:none}
.lb-bg{position:absolute;inset:0;background:rgba(246,238,224,.95);backdrop-filter:blur(8px)}
.lb-in{position:relative;width:min(1100px,100%);max-height:100%;display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:28px;align-items:center;color:#2B241C;animation:fadeUp .45s var(--ease,ease)}
@media (max-width:820px){.lb-in{grid-template-columns:1fr;gap:16px;overflow:auto}}
.lb-media{position:relative}
.lb-media canvas{display:block;width:100%;height:auto;aspect-ratio:3/2;max-width:100%;box-shadow:0 30px 80px rgba(0,0,0,.6)}
.lb-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:72px;height:72px;border-radius:50%;border:1px solid rgba(255,255,255,.5);background:rgba(184,134,47,.85);color:#fff;cursor:pointer;display:grid;place-items:center}
.lb-play[hidden]{display:none}
.lb-info{display:flex;flex-direction:column;gap:8px;min-width:0}
.lb-n,.lb-y{font:600 11.0px var(--f-body);letter-spacing:.06em;color:#7A6E5E}
.lb-y{font-size:44px;font-family:var(--f-display);font-weight:200;letter-spacing:-.04em;color:#9A6E22;line-height:1}
.lb-info h3{font-size:clamp(24px,2.6vw,34px);font-weight:300;letter-spacing:-.03em}
.lb-info p{color:#6B5F50;line-height:1.65}
.lb-info small{font:600 10.5px var(--f-body);text-transform:uppercase;letter-spacing:.05em;color:#7A6E5E}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:4px;border:1px solid rgba(43,36,28,.2);background:rgba(251,246,236,.6);color:#2B241C;font-size:24px;cursor:pointer}
.lb-prev{left:-58px}.lb-next{right:-58px}
@media (max-width:1240px){.lb-prev{left:8px;top:32%}.lb-next{right:8px;top:32%}}
.lb-x{position:absolute;right:-8px;top:-44px;background:none;border:0;color:#6B5F50;font-size:32px;cursor:pointer}
@media (max-width:820px){.lb-x{right:4px;top:-40px}}
@media (prefers-reduced-motion:reduce){.lb-in{animation:none}}