/* ===== Luyện IELTS Listening ===== */
.ls { --nv: #14285a; --rd: #c8102e; }
.ls-hero { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px; align-items: center; background: linear-gradient(125deg, #14285a 0%, #23397a 58%, #c8102e 135%); color: #fff; border-radius: 22px; padding: 26px 28px; margin: 4px 0 18px; box-shadow: 0 14px 34px rgba(20,40,90,.16); }
.ls-hero h1 { color: #fff; margin: 10px 0 8px; font-size: 2rem; font-family: var(--f-head); }
.ls-hero p { margin: 0 0 12px; line-height: 1.6; opacity: .94; max-width: 760px; }
.ls-hero .tag { display: inline-block; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.3); border-radius: 99px; padding: 4px 12px; font-size: .8rem; }
.ls-hero .lt-steps span { color: #fff; }
.ls-me { background: #fff; color: var(--nv); border-radius: 18px; padding: 16px 22px; text-align: center; min-width: 180px; display: grid; gap: 3px; }
.ls-me b { font: 800 2rem/1.1 Montserrat, sans-serif; color: var(--rd); }
.ls-me small { color: #5a6580; }
.ls-me a { margin-top: 6px; font-weight: 700; color: #fff; background: var(--rd); border-radius: 10px; padding: 7px 10px; text-decoration: none; font-size: .9rem; }
@media (max-width: 700px) { .ls-hero { grid-template-columns: minmax(0, 1fr); padding: 20px 18px; } .ls-hero h1 { font-size: 1.55rem; } }

.sb { display: inline-block; font-style: normal; font-weight: 800; font-size: .72rem; letter-spacing: .05em; text-transform: uppercase; color: #fff; border-radius: 6px; padding: 3px 8px; margin-right: 8px; vertical-align: 2px; }
.sb.s1 { background: #0e7c66; } .sb.s2 { background: #2456b8; } .sb.s3 { background: #8a3fbf; } .sb.s4 { background: #c8102e; }
.ls-sec { font-size: .98rem; color: var(--nv); margin: 24px 0 10px; font-weight: 700; }
.ls-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 12px; }
.ls-card { display: flex; flex-direction: column; gap: 4px; background: #fff; border: 1.5px solid var(--line); border-radius: 16px; padding: 14px 16px; text-decoration: none; color: var(--ink); transition: transform .12s, border-color .12s, box-shadow .12s; }
.ls-card:hover { transform: translateY(-2px); border-color: var(--nv); box-shadow: 0 8px 20px rgba(20,40,90,.1); }
.ls-card.fin { border-color: #86efac; background: linear-gradient(180deg, #f0fdf4, #fff); }
.ls-card .no { font-size: .75rem; font-weight: 800; color: var(--rd); text-transform: uppercase; letter-spacing: .05em; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.ls-card .no em { font-style: normal; text-transform: none; letter-spacing: 0; background: #fff1f2; color: var(--rd); border: 1px solid #fecdd3; border-radius: 99px; padding: 1px 8px; font-weight: 700; }
.ls-card b { font-size: 1.02rem; color: var(--nv); line-height: 1.35; }
.ls-card i { font-style: normal; font-size: .84rem; color: #5f6b85; line-height: 1.45; }
.ls-card .meta { font-size: .8rem; color: #5a6580; margin-top: 4px; }
.ls-card .bar { height: 6px; background: #eef0f5; border-radius: 99px; overflow: hidden; margin-top: 4px; }
.ls-card .bar i { display: block; height: 100%; background: linear-gradient(90deg, #10b981, #22408a); }

.ls-crumb { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin: 4px 0 12px; font-size: .9rem; color: #5a6580; }
.ls-crumb a { font-weight: 700; color: var(--nv); text-decoration: none; }
.ls-head { background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--rd); border-radius: 16px; padding: 18px 20px; margin-bottom: 14px; }
.ls-head h1 { margin: 0 0 6px; font-size: clamp(1.25rem, 3.4vw, 1.65rem); color: var(--nv); font-family: var(--f-head); }
.ls-head p { margin: 4px 0; color: #4a5570; }
.ls-mode { display: grid; gap: 10px; }
.ls-mode h3 { margin: 4px 0; color: var(--nv); font-size: 1.05rem; }
.ls-mode .mdo { text-align: left; display: grid; gap: 4px; background: #fff; border: 2px solid var(--line); border-radius: 14px; padding: 14px 16px; cursor: pointer; font: inherit; color: var(--ink); transition: border-color .12s, transform .12s; }
.ls-mode .mdo:hover { border-color: var(--nv); transform: translateY(-1px); }
.ls-mode .mdo.x:hover { border-color: var(--rd); }
.ls-mode .mdo b { font-size: 1.05rem; color: var(--nv); }
.ls-mode .mdo.x b { color: var(--rd); }
.ls-mode .mdo span { color: #4a5570; line-height: 1.5; }

/* Thanh phát audio */
.ls-player { position: sticky; top: 64px; z-index: 20; display: flex; gap: 10px; align-items: center; background: var(--nv); color: #fff; border-radius: 16px; padding: 10px 14px; margin-bottom: 14px; box-shadow: 0 10px 26px rgba(20,40,90,.22); }
.ls-player.exam { background: linear-gradient(90deg, #8f0b20, #c8102e); }
.ls-player .pp { flex: none; width: 46px; height: 46px; border-radius: 50%; border: 0; background: #fff; color: var(--rd); font-size: 1.15rem; font-weight: 800; cursor: pointer; }
.ls-player .pp.lock { cursor: default; opacity: .85; }
.ls-player .sk { flex: none; border: 1px solid rgba(255,255,255,.4); background: transparent; color: #fff; border-radius: 10px; padding: 7px 9px; font: 600 .82rem/1 inherit; cursor: pointer; }
.ls-player .tl { flex: 1; min-width: 0; display: grid; gap: 5px; }
.ls-player .bar { height: 8px; background: rgba(255,255,255,.25); border-radius: 99px; cursor: pointer; overflow: hidden; }
.ls-player.exam .bar { cursor: default; }
.ls-player .bar i { display: block; height: 100%; width: 0; background: #fff; border-radius: 99px; }
.ls-player .tl span { font-size: .78rem; opacity: .9; font-variant-numeric: tabular-nums; }
.ls-player select { flex: none; border: 0; border-radius: 9px; padding: 6px 6px; font: 600 .85rem inherit; color: var(--nv); }
.ls-player .xm { flex: none; font-size: .78rem; font-weight: 700; background: rgba(255,255,255,.16); border-radius: 99px; padding: 5px 10px; }
@media (max-width: 560px) { .ls-player { top: 56px; padding: 8px 10px; gap: 8px; } .ls-player .xm { display: none; } }

/* Đề */
.ls-q { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 18px 20px; }
.ls-q .qs { font: 800 .8rem/1 Montserrat, sans-serif; letter-spacing: .06em; text-transform: uppercase; color: var(--rd); }
.ls-q .ins { margin: 8px 0 12px; color: #33405e; }
.ls-q .sheet { border: 1.5px solid #d7dcea; border-radius: 12px; padding: 14px 18px; background: #fbfcff; }
.ls-q .sheet h3 { margin: 0 0 10px; text-align: center; color: var(--nv); font-size: 1.05rem; }
.ls-q .sheet h4 { margin: 14px 0 4px; color: var(--nv); font-size: .95rem; }
.ls-q .sheet p { margin: 7px 0; line-height: 2; }
.ls-q .sheet p.li { padding-left: 18px; position: relative; }
.ls-q .sheet p.li::before { content: "•"; position: absolute; left: 4px; color: var(--rd); font-weight: 800; }
.gap { display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; vertical-align: middle; }
.gap > b { width: 24px; height: 24px; border-radius: 7px; background: var(--nv); color: #fff; display: inline-grid; place-items: center; font-size: .78rem; }
.gap input { width: 9.5em; max-width: 46vw; border: 0; border-bottom: 2px solid #9aa6c4; background: #fff; padding: 3px 6px; font: 600 1rem inherit; color: var(--nv); border-radius: 4px 4px 0 0; }
.gap input:focus { outline: 0; border-bottom-color: var(--rd); background: #fff7f8; }
.gap.ok input { border-bottom-color: #16a34a; background: #f0fdf4; color: #166534; }
.gap.ok > b { background: #16a34a; }
.gap.no input { border-bottom-color: #dc2626; background: #fef2f2; color: #991b1b; text-decoration: line-through; }
.gap.no > b { background: #dc2626; }
.gap .key { font-weight: 800; color: #166534; background: #dcfce7; border-radius: 6px; padding: 1px 7px; }
.gap .re { border: 0; background: #eef2ff; border-radius: 7px; cursor: pointer; padding: 2px 5px; font-size: .9rem; }
.ls-q .act { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.ls-q .act .btn { width: auto; }
.btn.pulse { animation: lsPulse 1.2s ease-in-out infinite; }
@keyframes lsPulse { 50% { box-shadow: 0 0 0 8px rgba(200,16,46,.22); } }

/* Kết quả & script */
.ls-res { display: flex; gap: 18px; align-items: center; margin: 14px 0; background: #fff; border: 1.5px solid var(--line); border-left: 6px solid var(--rd); border-radius: 16px; padding: 16px 20px; }
.ls-res .sc { flex: none; text-align: center; }
.ls-res .sc b { font: 800 2.6rem/1 Montserrat, sans-serif; color: var(--rd); }
.ls-res .sc span { display: block; color: #5a6580; font-weight: 700; }
.ls-res h3 { margin: 0 0 4px; color: var(--nv); }
.ls-res p { margin: 0 0 10px; color: #3c4763; }
.ls-res .row { display: flex; gap: 8px; flex-wrap: wrap; }
.ls-res .btn { width: auto; }
.ls-scr { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 16px 20px; margin-bottom: 18px; }
.ls-scr .hd { display: grid; gap: 4px; margin-bottom: 10px; }
.ls-scr h3 { margin: 0; color: var(--nv); }
.ls-scr .ln { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 10px; margin: 0; padding: 7px 8px; border-radius: 10px; cursor: pointer; line-height: 1.65; transition: background .15s; }
.ls-scr .ln:hover { background: #f5f7fc; }
.ls-scr .ln.now { background: #fff6e0; }
.ls-scr .ln.flash { background: #ffe4e8; }
.ls-scr .who { font-weight: 700; color: var(--nv); font-size: .88rem; padding-top: 2px; }
.ls-scr mark { background: #fde68a; color: inherit; border-radius: 4px; padding: 0 3px; font-weight: 700; }
.ls-scr mark sup { color: #fff; background: var(--rd); border-radius: 4px; padding: 0 4px; margin-right: 3px; font-size: .68rem; }
@media (max-width: 560px) { .ls-scr .ln { grid-template-columns: minmax(0, 1fr); gap: 0; } .ls-res { flex-direction: column; align-items: flex-start; } }

/* Tra từ */
.lk-pop { position: fixed; z-index: 2147483000; width: 320px; max-width: calc(100vw - 16px); background: #fff; border: 1px solid #d7dcea; border-radius: 14px; box-shadow: 0 16px 40px rgba(20,40,90,.22); padding: 12px 14px; display: grid; gap: 6px; }
.lk-pop .lkh { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.lk-pop .lkh b { color: var(--nv, #14285a); font-size: 1.05rem; }
.lk-pop .lkh small { color: #5a6580; font-weight: 500; }
.lk-pop .lkh i { color: #c8102e; font-size: .8rem; }
.lk-pop .x { border: 0; background: transparent; cursor: pointer; font-size: 1rem; color: #5a6580; }
.lk-pop .lkb { display: grid; gap: 6px; }
.lk-pop .vi { font-weight: 700; color: #c8102e; }
.lk-pop .btn { width: auto; justify-self: start; }
.lk-fab { position: fixed; z-index: 2147483000; border: 0; background: #14285a; color: #fff; border-radius: 99px; padding: 8px 14px; font: 700 .9rem inherit; box-shadow: 0 8px 20px rgba(20,40,90,.3); }

/* Từ vựng của tôi */
.ls-tabs { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.ls-tabs button { border: 1.5px solid var(--line); background: #fff; color: var(--nv); border-radius: 99px; padding: 6px 14px; font: 600 .88rem inherit; cursor: pointer; }
.ls-tabs button.on { background: var(--nv); border-color: var(--nv); color: #fff; }
.ls-vocab { display: grid; gap: 10px; margin-bottom: 18px; }
.ls-vocab .vw { display: flex; justify-content: space-between; gap: 12px; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 12px 16px; }
.ls-vocab .vw.kn { opacity: .7; }
.ls-vocab .vw b { color: var(--nv); font-size: 1.05rem; }
.ls-vocab .vw small { color: #5a6580; }
.ls-vocab .vw i { color: #c8102e; font-size: .8rem; }
.ls-vocab .vi { font-weight: 700; color: #c8102e; margin: 2px 0; }
.ls-vocab .ex { font-family: Lora, serif; font-style: italic; color: #4a5570; font-size: .92rem; }
.ls-vocab .bt { display: flex; flex-direction: column; gap: 6px; flex: none; }
.ls-vocab .bt button { border: 1.5px solid var(--line); background: #fff; border-radius: 9px; padding: 5px 9px; cursor: pointer; font: 600 .82rem inherit; color: var(--nv); }
#res, .ls-scr, .ls-res { scroll-margin-top: 150px; }
@media (max-width: 560px) { .gap input { width: 7.2em; } .ls-q { padding: 14px 12px; } .ls-q .sheet { padding: 12px; } }
.sb.s0 { background: linear-gradient(90deg, #14285a, #c8102e); }
.ls-full { gap: 8px; border: 2px solid #f3c1ca; background: linear-gradient(180deg, #fff5f7, #fff); }
.ls-full .btn { width: auto; align-self: flex-start; }
.ls-full .pts { font-size: .82rem; color: #5a6580; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.ls-full .pts a { border: 1.5px solid var(--line); border-radius: 99px; padding: 3px 10px; font-weight: 700; color: var(--nv); text-decoration: none; background: #fff; }
.ls-full .pts a:hover { border-color: var(--nv); }
.ls-q .sheet + .qs { margin-top: 22px; }
.lk-tip { margin: 12px 0 0; }
.ls-res .sc em { display: block; font-style: normal; font-weight: 800; color: #fff; background: var(--rd); border-radius: 8px; padding: 2px 8px; margin-top: 4px; font-size: .85rem; }
.ls-scr h4.pt { margin: 14px 0 4px; color: var(--rd); font-size: .95rem; text-transform: uppercase; letter-spacing: .05em; }
.ls-vt { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.ls-vt button { border: 0; background: var(--nv); color: #fff; border-radius: 10px; padding: 8px 14px; font: 700 .88rem inherit; cursor: pointer; }
.ls-vt button:nth-child(2) { background: var(--rd); }
.ls-vt button:nth-child(3) { background: #0e7c66; }
.ls-fc { min-height: 220px; display: grid; place-items: center; align-content: center; gap: 8px; text-align: center; background: #fff; border: 2px solid var(--line); border-radius: 20px; padding: 24px; cursor: pointer; box-shadow: 0 10px 26px rgba(20,40,90,.08); margin: 8px 0 14px; }
.ls-fc.back { background: #fff8e6; border-color: #fcd98b; }
.ls-fc .big { font-size: 2rem; color: var(--nv); }
.ls-fc b { color: var(--nv); font-size: 1.3rem; }
.ls-fc i { color: var(--rd); font-size: .85rem; }
.ls-fc .vi { font-weight: 800; color: var(--rd); font-size: 1.2rem; }
.ls-fc .ex { font-family: Lora, serif; font-style: italic; color: #4a5570; }
.ls-fc.done { cursor: default; }
.ls-fc .row, .ls-fcb { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.ls-fcb .btn, .ls-fc .btn { width: auto; }
.ls-qz { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 20px; margin-bottom: 18px; }
.ls-qz > b { font-size: 1.5rem; color: var(--nv); }
.ls-qz .ex { font-family: Lora, serif; font-style: italic; color: #4a5570; margin: 6px 0; }
.ls-qz .op { display: grid; gap: 8px; margin-top: 12px; }
.ls-qz .op button { text-align: left; border: 1.5px solid var(--line); background: #fff; border-radius: 12px; padding: 11px 14px; font: 600 .98rem inherit; color: var(--ink); cursor: pointer; }
.ls-qz .op button:hover:not(:disabled) { border-color: var(--nv); }
.ls-qz .op button.ok { background: #dcfce7; border-color: #16a34a; color: #166534; }
.ls-qz .op button.no { background: #fee2e2; border-color: #dc2626; color: #991b1b; }
.lt-nav a { white-space: nowrap; }
/* Cấp độ Basic / Intermediate */
.ls-lv { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 0 0 6px; }
.ls-lv .lv { display: grid; gap: 4px; text-align: left; background: #fff; border: 2px solid var(--line); border-radius: 16px; padding: 12px 16px; cursor: pointer; font: inherit; color: var(--ink); }
.ls-lv .lv b { font-size: 1.05rem; color: var(--nv); }
.ls-lv .lv span { font-size: .85rem; color: #5a6580; }
.ls-lv .lv.on { border-color: var(--rd); background: linear-gradient(180deg, #fff5f7, #fff); box-shadow: 0 8px 20px rgba(200,16,46,.10); }
.ls-lv .lv.on b { color: var(--rd); }
.ls-lvnote { background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 12px; padding: 10px 14px; font-size: .9rem; color: #14532d; margin: 8px 0 0; }
@media (max-width: 640px) { .ls-lv { grid-template-columns: 1fr; } }
.ls-q .sheet.dict { background: #fff; }
.ls-q .sheet.dict .dl { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 8px; margin: 0; padding: 4px 6px; border-radius: 8px; line-height: 2.1; }
.ls-q .sheet.dict .dl .who { font-weight: 700; color: var(--nv); font-size: .9rem; }
.ls-q .sheet.dict.done .dl { cursor: pointer; }
.ls-q .sheet.dict.done .dl:hover { background: #f5f7fc; }
.ls-q .sheet.dict .dl.now { background: #fff6e0; }
.ls-q .sheet.dict .dl.flash { background: #ffe4e8; }
.ls-q .sheet.dict .gap input { width: 7.2em; }
.ls-q .sheet.dict h4 { color: var(--rd); }
@media (max-width: 560px) { .ls-q .sheet.dict .dl { grid-template-columns: minmax(0, 1fr); gap: 0; } }