.lt-nav { display: flex; gap: 4px; margin-left: 10px; }
.lt-nav a { color: var(--brand); text-decoration: none; font-weight: 600; font-size: .9rem; padding: 6px 10px; border-radius: 8px; }
.lt-nav a:hover { background: var(--red-soft); }
@media (max-width: 720px) { .lt-nav { display: none; } }

.lt-hero { background: linear-gradient(120deg, #14285a 0%, #23397a 55%, #c8102e 130%); color: #fff; border-radius: 20px; padding: 28px 26px; margin-bottom: 22px; box-shadow: 0 14px 34px rgba(20, 40, 90, .22); }
.lt-hero .tag { display: inline-block; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.35); border-radius: 99px; padding: 4px 12px; font-size: .78rem; font-weight: 600; }
.lt-hero h1 { color: #fff; font-family: var(--f-head); font-size: clamp(1.5rem, 4vw, 2.1rem); margin: 10px 0 6px; line-height: 1.2; }
.lt-hero p { margin: 0; opacity: .92; max-width: 640px; }
.lt-steps { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 14px; font-size: .9rem; }
.lt-steps span b { background: #fff; color: #c8102e; border-radius: 50%; width: 22px; height: 22px; display: inline-grid; place-items: center; font-size: .78rem; margin-right: 6px; }

.lt-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 900px) { .lt-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .lt-grid { grid-template-columns: 1fr; } }
.lt-card { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 16px; display: flex; flex-direction: column; gap: 10px; box-shadow: 0 8px 22px rgba(20,40,90,.06); transition: transform .15s, box-shadow .15s; }
.lt-card:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(200,16,46,.12); }
.lt-card .hd { display: flex; align-items: center; gap: 10px; }
.lt-card .ic { font-size: 1.8rem; }
.lt-card h3 { margin: 0; font-size: 1.1rem; color: var(--brand); }
.lt-card small { color: var(--ink-soft); }
.lt-card .bt { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.lt-ex { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; text-align: left; border: 1.5px solid var(--line); background: var(--paper); border-radius: 12px; padding: 9px 11px; cursor: pointer; font: inherit; color: var(--ink); }
.lt-ex:hover { border-color: var(--red); background: #fff; }
.lt-ex b { font-size: .92rem; }
.lt-ex span { font-size: .75rem; color: var(--ink-soft); }
.lt-ex .chip { margin-top: 3px; font-size: .7rem; padding: 1px 7px; }

.lt-head { margin: 4px 0 14px; }
.lt-head h1 { font-family: var(--f-head); font-size: clamp(1.3rem, 3.2vw, 1.7rem); margin: 4px 0; color: var(--brand); }
.lt-ins { background: var(--red-soft); border-radius: 12px; padding: 10px 14px; font-size: .92rem; margin-bottom: 14px; }
.lt-item { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; margin-bottom: 12px; }
.lt-q { display: flex; gap: 10px; align-items: flex-start; }
.lt-q .n { flex: none; width: 28px; height: 28px; border-radius: 8px; background: var(--brand); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: .85rem; }
.lt-q p { margin: 2px 0 0; font-family: "Lora", Georgia, serif; font-size: 1.02rem; line-height: 1.5; white-space: pre-line; -webkit-user-select: none; user-select: none; }
.lt-hints { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 8px 38px; align-items: center; }
.lt-hints em { font-style: normal; font-size: .75rem; color: var(--ink-soft); font-weight: 600; }
.lt-hints span { background: #eef3ff; color: #1d3f8a; border-radius: 99px; padding: 2px 10px; font-size: .8rem; font-weight: 600; }
.lt-hints span.used { background: var(--green-soft); color: var(--green); }
.lt-item textarea { width: 100%; min-height: 70px; resize: vertical; margin-left: 0; font: inherit; border: 1.5px solid var(--line); border-radius: 10px; padding: 10px 12px; background: var(--paper); }
.lt-item textarea:focus { outline: 2px solid var(--brand); border-color: transparent; background: #fff; }
.lt-bar { position: sticky; bottom: 0; background: rgba(255,255,255,.96); backdrop-filter: blur(6px); border-top: 1px solid var(--line); padding: 12px 0; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; justify-content: space-between; margin-top: 6px; }

.lt-res-top { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; margin-bottom: 14px; }
.lt-score { font-family: var(--f-head); font-size: 2rem; color: var(--red); font-weight: 800; line-height: 1; }
.lt-score small { display: block; font-family: inherit; font-size: .8rem; color: var(--ink-soft); font-weight: 600; margin-top: 4px; }
.lt-res-top p { flex: 1; min-width: 240px; margin: 0; }
.lt-ans { margin: 10px 0 0 38px; display: grid; gap: 8px; }
.lt-ans .row { border-radius: 10px; padding: 8px 12px; font-size: .93rem; }
.lt-ans .me { background: var(--paper); border: 1px dashed var(--line); }
.lt-ans .praise { background: var(--green-soft); color: #145c32; }
.lt-ans .fb { background: #fff8eb; }
.lt-ans .fix { background: #fff; border: 1px solid var(--line); }
.lt-ans .lt-model { background: #eef3ff; color: #1d3f8a; }
.lt-ans .lt-model span { display: block; white-space: pre-line; font-weight: 600; }
.lt-ans .row b.l { display: block; font-size: .72rem; letter-spacing: .05em; text-transform: uppercase; opacity: .75; margin-bottom: 2px; }
.v-good { background: var(--green-soft); color: var(--green); }
.v-ok { background: #e8f1ff; color: #1d4ed8; }
.v-needs_work { background: var(--amber-soft); color: var(--amber); }
.v-missing { background: var(--paper); color: var(--ink-soft); }
@media (max-width: 560px) { .lt-hints, .lt-ans { margin-left: 0; } }

.lt-cta { margin: 22px 0 6px; border-radius: 18px; padding: 20px; background: linear-gradient(135deg, #14285a, #2a3f7e); color: #fff; display: grid; gap: 10px; }
.lt-cta h2 { margin: 0; font-size: 1.2rem; color: #fff; }
.lt-cta p { margin: 0; opacity: .92; }
.lt-cta .row { display: flex; gap: 10px; flex-wrap: wrap; }
.lt-cta .btn-light { background: #fff; color: #c8102e; border-color: #fff; }
.lt-wait { text-align: center; padding: 40px 10px; }
.lt-spin { width: 42px; height: 42px; border-radius: 50%; border: 4px solid var(--red-soft); border-top-color: var(--red); animation: ltspin 1s linear infinite; margin: 0 auto 12px; }
@keyframes ltspin { to { transform: rotate(360deg); } }
.lt-foot { text-align: center; color: var(--ink-soft); font-size: .85rem; padding: 26px 16px 40px; }
.lt-foot a { color: var(--brand); }

.topbar .brand { text-decoration: none; }

.lt-sec { font-family: var(--f-head); font-size: 1.15rem; color: var(--brand); margin: 22px 0 12px; display: flex; align-items: baseline; gap: 10px; }
.lt-sec small { font-family: inherit; font-size: .8rem; color: var(--ink-soft); font-weight: 600; }
.lt-tally { display: flex; flex-direction: column; gap: 6px; }
.lt-tally span { border-radius: 99px; padding: 5px 12px; font-weight: 700; font-size: .9rem; white-space: nowrap; }
.lt-tally .ok { background: var(--green-soft); color: var(--green); }
.lt-tally .fix { background: var(--amber-soft); color: var(--amber); }
.lt-tally .miss { background: var(--paper); color: var(--ink-soft); }

/* Hall of Fame chạy ngang */
.lt-hof { margin-top: 10px; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 18px 18px 20px; box-shadow: 0 8px 22px rgba(20,40,90,.06); }
.lt-hof h2 { margin: 0 0 4px; font-size: 1.15rem; color: var(--brand); }
.lt-hof .muted { margin: 0 0 10px; }
.hmq { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 3%, #000 97%, transparent); mask-image: linear-gradient(90deg, transparent, #000 3%, #000 97%, transparent); }
.hmt { display: flex; gap: 14px; width: max-content; animation: hmqm 48s linear infinite; }
.hmq:hover .hmt, .hmq:active .hmt { animation-play-state: paused; }
.hfi { margin: 0; flex: 0 0 190px; }
.hfi img { display: block; width: 100%; aspect-ratio: 640 / 852; object-fit: cover; border-radius: 12px; border: 1px solid var(--line); box-shadow: 0 6px 18px rgba(20,40,90,.12); background: var(--paper); -webkit-user-select: none; user-select: none; }
.hfi figcaption { display: flex; gap: 6px; align-items: center; justify-content: center; font-size: .8rem; font-weight: 600; margin-top: 6px; text-align: center; color: var(--ink); }
.hfi figcaption b { background: var(--red); color: #fff; border-radius: 6px; padding: 1px 6px; font-size: .75rem; }
@keyframes hmqm { from { transform: translateX(0); } to { transform: translateX(calc(-50% - 7px)); } }
@media (max-width: 560px) { .hfi { flex-basis: 150px; } .hmt { animation-duration: 38s; } }