/* Horizon Practice – giao diện.
   Bố cục: một cột nội dung 960px dưới dải đầu trang xanh lá có viền cam như đường chân trời lúc bình minh. */
:root {
  --g: #17B255;        /* xanh lá logo */
  --g-ink: #0A6B34;    /* chữ xanh trên nền sáng */
  --g-soft: #E6F6EC;
  --o: #F99C38;        /* cam logo */
  --o-ink: #A35200;    /* chữ cam trên nền sáng */
  --o-soft: #FFF1E2;
  --on-o: #2B1600;
  --bg: #F4F8F5;
  --card: #FFFFFF;
  --ink: #13291C;
  --mute: #566F60;
  --line: #D9E7DE;
  --field: #FFFFFF;
  --btn: #0B7F3E;
  --on-btn: #FFFFFF;
  --head: #0B7F3E;
  --on-head: #FFFFFF;
  --ok: #14883E;
  --on-ok: #FFFFFF;
  --bad: #C23B2E;
  --on-bad: #FFFFFF;
  --bad-soft: #FCE9E6;
  --sun: #FFD25C;
  --shadow: 0 1px 2px rgba(19, 41, 28, .06), 0 8px 24px rgba(19, 41, 28, .06);
  --f-display: "Lexend", "Be Vietnam Pro", system-ui, sans-serif;
  --f-body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --f-en: "Andika", "Be Vietnam Pro", system-ui, sans-serif;
  --r: 18px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --g: #2CC96B; --g-ink: #74E3A0; --g-soft: #173A27;
    --o: #FFAE5C; --o-ink: #FFBC78; --o-soft: #3A2A16; --on-o: #2B1600;
    --bg: #0D1813; --card: #13221A; --ink: #E3F1E8; --mute: #9AB8A6; --line: #27432F; --field: #0F1C15;
    --btn: #3DD07A; --on-btn: #04210E; --head: #0F2C1D; --on-head: #FFFFFF;
    --ok: #3DD07A; --on-ok: #04210E; --bad: #FF8A7A; --on-bad: #2A0A06; --bad-soft: #3A1C18;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --g: #2CC96B; --g-ink: #74E3A0; --g-soft: #173A27;
  --o: #FFAE5C; --o-ink: #FFBC78; --o-soft: #3A2A16; --on-o: #2B1600;
  --bg: #0D1813; --card: #13221A; --ink: #E3F1E8; --mute: #9AB8A6; --line: #27432F; --field: #0F1C15;
  --btn: #3DD07A; --on-btn: #04210E; --head: #0F2C1D; --on-head: #FFFFFF;
  --ok: #3DD07A; --on-ok: #04210E; --bad: #FF8A7A; --on-bad: #2A0A06; --bad-soft: #3A1C18;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 16px/1.55 var(--f-body);
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 50; background: var(--head); }
img { max-width: 100%; }
[hidden] { display: none !important; }
h1, h2, h3 { font-family: var(--f-display); font-weight: 600; line-height: 1.2; margin: 0; text-wrap: balance; }
h2 { font-size: 20px; color: var(--g-ink); }
h3 { font-size: 17px; }
p { margin: 0; }
a { color: var(--g-ink); }
button { font: inherit; color: inherit; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.wrap { max-width: 960px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.muted { color: var(--mute); }
.hint { font-size: 14px; color: var(--mute); }
.en { font-family: var(--f-en); }
.nowrap { white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.row.sp { justify-content: space-between; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.grid > * { min-width: 0; }

/* ---------- đầu trang ---------- */
.demo-bar { background: var(--o); color: var(--on-o); font-size: 14px; font-weight: 600; }
.demo-bar .wrap { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; justify-content: center; padding-block: 6px; text-align: center; }
.demo-bar button { background: rgba(255, 255, 255, .55); border: 0; border-radius: 999px; padding: 3px 12px; font-weight: 700; cursor: pointer; color: var(--on-o); }
.top { background: var(--head); color: var(--on-head); border-bottom: 4px solid var(--o); position: sticky; top: env(safe-area-inset-top, 0px); z-index: 40; }
.top .wrap { max-width: 1120px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding-block: 10px; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; text-decoration: none; color: inherit; }
.brand .chip { background: #FFFFFF; border-radius: 12px; padding: 6px 10px; display: grid; place-items: center; flex: none; }
.brand .chip img { height: 28px; display: block; }
.brand .pt { font: 600 15px var(--f-display); white-space: nowrap; }
.top.staff .brand .pt { display: none; }
@media (max-width: 640px) { .brand .pt { display: none; } }
.tabs { display: flex; gap: 4px; background: rgba(255, 255, 255, .14); padding: 4px; border-radius: 999px; overflow-x: auto; scrollbar-width: none; max-width: 100%; }
.tabs::-webkit-scrollbar { display: none; }
.tabs button { border: 0; background: none; color: var(--on-head); font: 600 14px var(--f-display); padding: 8px 14px; border-radius: 999px; cursor: pointer; white-space: nowrap; position: relative; }
.tabs button.on { background: #FFFFFF; color: #0B7F3E; }
.tabs .dot { display: inline-grid; place-items: center; min-width: 20px; height: 20px; padding: 0 6px; margin-left: 6px; border-radius: 999px; background: var(--o); color: var(--on-o); font-size: 12px; }
.who { margin-left: auto; display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 14px; }
.who .b { background: transparent; border: 1.5px solid rgba(255, 255, 255, .7); color: var(--on-head); }
@media (max-width: 760px) { .top .tabs { order: 3; width: 100%; } .who { font-size: 13px; } }
@media (max-width: 560px) { .who .nm { display: none; } }

main { padding-block: 20px 48px; }
main.wide { max-width: 1160px; }
.grid.stats { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.rep td.nm { min-width: 160px; }
.rep td.dt { min-width: 220px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 20px; box-shadow: var(--shadow); margin-bottom: 16px; min-width: 0; }
.card > h2 + .muted, .card > h2 + .hint { margin-top: 4px; }
.card-h { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.sec { margin-top: 16px; }

/* ---------- nút và ô nhập ---------- */
.b { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 42px; padding: 9px 16px; border-radius: 12px; border: 0; background: var(--btn); color: var(--on-btn); font: 600 15px var(--f-body); cursor: pointer; text-decoration: none; transition: transform .08s ease, filter .15s ease; }
.b:hover { filter: brightness(1.06); }
.b:active { transform: translateY(1px); }
.b.o { background: var(--o); color: var(--on-o); }
.b.gh { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.b.gh:hover { border-color: var(--g); }
.b.dg { background: var(--bad); color: var(--on-bad); }
.b.sm { min-height: 34px; padding: 5px 11px; font-size: 14px; border-radius: 10px; }
.b.lg { min-height: 52px; padding: 12px 22px; font-size: 17px; border-radius: 14px; }
.b:disabled, .b[aria-disabled="true"] { opacity: .45; cursor: not-allowed; filter: none; transform: none; }
:focus-visible { outline: 3px solid var(--o); outline-offset: 2px; }
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 5px; }
.fld { display: flex; flex-direction: column; min-width: 0; }
input, select, textarea { width: 100%; font: inherit; color: var(--ink); background: var(--field); border: 1.5px solid var(--line); border-radius: 12px; padding: 10px 12px; min-height: 44px; }
textarea { resize: vertical; line-height: 1.5; }
input[type="checkbox"], input[type="radio"] { width: 18px; height: 18px; min-height: 0; accent-color: var(--g); margin: 0; flex: none; }
input[type="file"] { padding: 8px; }
input:focus, select:focus, textarea:focus { border-color: var(--g); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--g) 25%, transparent); }
.chk { display: inline-flex; gap: 8px; align-items: center; font-weight: 500; font-size: 15px; margin: 0; cursor: pointer; }
details > summary { cursor: pointer; font-weight: 600; color: var(--g-ink); padding: 4px 0; }
details[open] > summary { margin-bottom: 10px; }

/* ---------- nhãn, thanh tiến độ, bảng ---------- */
.tag { display: inline-flex; align-items: center; gap: 4px; padding: 2px 10px; border-radius: 999px; font-size: 13px; font-weight: 600; background: var(--g-soft); color: var(--g-ink); white-space: nowrap; }
.tag.o { background: var(--o-soft); color: var(--o-ink); }
.tag.bad { background: var(--bad-soft); color: var(--bad); }
.tag.mute { background: color-mix(in srgb, var(--line) 60%, transparent); color: var(--mute); }
.tag.ok { background: var(--ok); color: var(--on-ok); }
.bar { height: 10px; background: color-mix(in srgb, var(--line) 80%, transparent); border-radius: 999px; overflow: hidden; }
.bar > i { display: block; height: 100%; border-radius: 999px; background: var(--g); transition: width .4s ease; }
.bar.sunrise > i { background: linear-gradient(90deg, var(--g), var(--o)); }
.scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; color: var(--mute); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
.code { font: 700 15px var(--f-display); letter-spacing: .06em; font-variant-numeric: tabular-nums; }
.stat { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border-radius: 14px; background: var(--g-soft); }
.stat b { font: 700 26px var(--f-display); color: var(--g-ink); font-variant-numeric: tabular-nums; }
.stat span { font-size: 13px; color: var(--mute); }
.stat.o { background: var(--o-soft); }
.stat.o b { color: var(--o-ink); }
.empty { text-align: center; padding: 22px 12px; color: var(--mute); }
.empty .ic { font-size: 38px; display: block; margin-bottom: 4px; }

/* ---------- đăng nhập ---------- */
.hero { position: relative; overflow: hidden; display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: center; padding: 22px 24px 0; }
.hero img { width: 150px; display: block; margin-bottom: 18px; }
.hero h1 { font-size: clamp(24px, 4vw, 32px); color: var(--g-ink); }
.hero h1 em { font-style: normal; color: var(--o-ink); }
.hero p { color: var(--mute); margin-top: 8px; max-width: 46ch; }
.hero .horizon { grid-column: 1 / -1; display: block; width: calc(100% + 48px); margin: 0 -24px; height: 46px; }
@media (max-width: 560px) { .hero { grid-template-columns: 1fr; text-align: center; } .hero img { margin: 0 auto 4px; width: 120px; } .hero p { margin-inline: auto; } }
.login-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.login-grid .card { margin: 0; display: flex; flex-direction: column; gap: 12px; }
.login-grid .card.stu { border-top: 5px solid var(--o); }
.login-grid .card.staff { border-top: 5px solid var(--g); }
#scode { font: 600 22px var(--f-display); letter-spacing: .08em; text-transform: uppercase; }
.err { color: var(--bad); font-weight: 600; font-size: 14px; min-height: 1em; }
.demo-acc { font-size: 14px; background: var(--o-soft); color: var(--ink); border-radius: 12px; padding: 10px 12px; }
.demo-acc button { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 2px 8px; cursor: pointer; font-weight: 600; margin: 2px 2px; }

/* ---------- vinh danh ---------- */
.honor-cat { margin: 18px 0 10px; font: 600 16px var(--f-display); color: var(--ink); }
.honors { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.honor { text-align: center; border: 1px solid var(--line); border-radius: 16px; padding: 16px 12px; background: var(--card); position: relative; overflow: hidden; }
.honor::before { content: ""; position: absolute; inset: 0 0 auto; height: 5px; background: linear-gradient(90deg, var(--g), var(--o)); }
.honor .ph { width: 92px; height: 92px; border-radius: 50%; margin: 6px auto 10px; background: linear-gradient(135deg, var(--g), var(--o)) center/cover no-repeat; display: grid; place-items: center; color: #FFFFFF; font: 700 30px var(--f-display); border: 3px solid var(--card); box-shadow: 0 0 0 2px var(--g); }
.honor b { display: block; font-family: var(--f-display); font-weight: 600; }
.honor .ttl { color: var(--o-ink); font: 700 19px var(--f-display); margin-top: 4px; }
.honor .q { font-style: italic; font-size: 14px; color: var(--mute); margin-top: 8px; }

/* ---------- học sinh ---------- */
.pts { display: grid; grid-template-columns: 1fr auto; gap: 14px 18px; align-items: center; background: linear-gradient(180deg, var(--o-soft), var(--card) 70%); }
.pts .big { font: 700 40px var(--f-display); color: var(--o-ink); line-height: 1; font-variant-numeric: tabular-nums; }
.pts .lv { display: flex; align-items: center; gap: 10px; }
.pts .lv i { font-style: normal; font-size: 36px; }
.pts .full { grid-column: 1 / -1; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; }
.bdg { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px 4px 6px; font-size: 13px; font-weight: 600; background: var(--card); }
.bdg i { font-style: normal; font-size: 18px; }
.bdg.off { opacity: .45; filter: grayscale(1); }
.bonus-row { font-size: 14px; padding: 6px 10px; border-radius: 10px; background: var(--g-soft); }
@media (max-width: 560px) { .pts { grid-template-columns: 1fr; } }
.asg { display: grid; grid-template-columns: 1fr auto; gap: 10px 14px; align-items: center; padding: 14px 0; border-top: 1px dashed var(--line); }
.asg:first-of-type { border-top: 0; }
.asg .t { font: 600 17px var(--f-display); }
@media (max-width: 520px) { .asg { grid-template-columns: 1fr; } .asg .b { width: 100%; } }
.stu-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; }
.ptchip { display: inline-flex; align-items: center; gap: 4px; padding: 6px 12px; border-radius: 999px; background: var(--o-soft); color: var(--o-ink); font: 700 16px var(--f-display); font-variant-numeric: tabular-nums; }
.lesson-head { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; }
.ring { --p: 0; width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--g) calc(var(--p) * 1%), color-mix(in srgb, var(--line) 80%, transparent) 0); flex: none; }
.ring b { width: 50px; height: 50px; border-radius: 50%; background: var(--card); display: grid; place-items: center; font: 700 15px var(--f-display); }
.acts { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.act { display: flex; gap: 12px; align-items: center; text-align: left; border: 1.5px solid var(--line); background: var(--card); border-radius: 16px; padding: 14px; cursor: pointer; min-height: 84px; }
.act:hover { border-color: var(--g); }
.act .ic { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 28px; background: var(--g-soft); flex: none; }
.act:nth-child(even) .ic { background: var(--o-soft); }
.act b { display: block; font: 600 16px var(--f-display); }
.act .tag { margin-top: 4px; }
.act.done { border-color: color-mix(in srgb, var(--g) 50%, var(--line)); }
.fbk { border-left: 5px solid var(--o); }
.taskbar { position: sticky; top: calc(env(safe-area-inset-top, 0px) + var(--head-h, 66px) + 8px); z-index: 30; padding: 10px 12px; }
.chips { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; padding-bottom: 2px; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: none; border: 1.5px solid var(--line); background: var(--card); color: var(--ink); border-radius: 999px; padding: 6px 12px; font-size: 14px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.chip.cur { border-color: var(--g); background: var(--g-soft); color: var(--g-ink); }
.chip.ok { color: var(--g-ink); }

/* câu luyện đọc */
.sent { padding: 16px 0; border-top: 1px dashed var(--line); display: flex; flex-direction: column; gap: 8px; }
.sent:first-of-type { border-top: 0; }
.say { font: 400 24px/1.5 var(--f-en); display: flex; flex-wrap: wrap; gap: 2px 8px; }
.wd { display: inline-flex; flex-direction: column; align-items: center; }
.w { cursor: pointer; border-radius: 6px; padding: 0 2px; transition: background .12s; }
.w:hover { background: var(--g-soft); }
.w.on { background: var(--sun); color: #2B1600; }
.w.hit { color: var(--g-ink); }
.w.miss { color: var(--o-ink); text-decoration: underline wavy var(--o); text-underline-offset: 5px; }
.ipa { font: 400 13px var(--f-body); color: var(--mute); }
.vi { color: var(--mute); font-size: 15px; }
.rec-msg { font-size: 14px; color: var(--mute); }
.rec-msg b { color: var(--ink); }
.score { font: 700 15px var(--f-display); }
audio { width: 100%; max-width: 420px; height: 40px; }
.rec-on { animation: pulse 1.1s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--bad) 25%, transparent); } }

/* chính tả */
.dict-in { font: 400 22px var(--f-en); }
.diff { font: 400 20px/1.6 var(--f-en); }
.diff .ok { color: var(--g-ink); }
.diff .no { color: var(--bad); text-decoration: line-through; }
.diff .add { color: var(--o-ink); text-decoration: underline; }

/* thẻ từ vựng */
.dots { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin: 6px 0 12px; }
.dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.dots i.on { background: var(--g); }
.dots i.cur { background: var(--o); transform: scale(1.3); }
.fwrap { perspective: 1200px; max-width: 520px; margin: 0 auto; }
.fcard { position: relative; height: 300px; cursor: pointer; transform-style: preserve-3d; transition: transform .55s cubic-bezier(.3, .7, .3, 1); }
.fcard.flip { transform: rotateY(180deg); }
.face { position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden; border-radius: 22px; border: 3px solid var(--g); background: var(--card); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; padding: 18px; text-align: center; }
.face.back { transform: rotateY(180deg); border-color: var(--o); background: linear-gradient(180deg, var(--o-soft), var(--card)); }
.face .em { font-size: 84px; line-height: 1.1; }
.face .fw { font: 700 36px var(--f-en); }
.face .fv { font: 700 30px var(--f-display); color: var(--o-ink); }
.face .fe { font: 400 19px var(--f-en); }
.face .fe mark { background: var(--sun); color: #2B1600; border-radius: 4px; padding: 0 2px; }
.face .fh { font-size: 13px; color: var(--mute); }
@media (prefers-reduced-motion: reduce) { .fcard { transition: none; } }

/* quiz */
.qtext { font: 400 24px/1.45 var(--f-en); margin: 14px 0 6px; }
.opts { display: grid; gap: 10px; margin-top: 10px; }
.opts.pic { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.opts.pic.n2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.opts.pic.n4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 560px) { .opts.pic.n4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .opts.pic .opt { font-size: 46px; min-height: 96px; } }
.opt { display: flex; align-items: center; gap: 10px; text-align: left; width: 100%; padding: 14px 16px; border-radius: 14px; border: 2px solid var(--line); background: var(--card); color: var(--ink); font: 400 20px var(--f-en); cursor: pointer; min-height: 56px; }
.opt .k { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--g-soft); color: var(--g-ink); font: 700 14px var(--f-display); flex: none; }
.opts.pic .opt { justify-content: center; font-size: 56px; padding: 14px 8px; min-height: 110px; }
.opts.pic .opt .k { display: none; }
.opt:hover:not(:disabled) { border-color: var(--g); }
.opt.right { background: var(--ok); color: var(--on-ok); border-color: var(--ok); }
.opt.wrong { background: var(--bad); color: var(--on-bad); border-color: var(--bad); }
.opt.right .k, .opt.wrong .k { background: rgba(255, 255, 255, .3); color: inherit; }
.opt:disabled { cursor: default; }
.stars { font-size: 44px; letter-spacing: 6px; }
.result { text-align: center; display: flex; flex-direction: column; gap: 10px; align-items: center; }

/* lý thuyết */
.theory h3 { color: var(--g-ink); font-size: 19px; margin-bottom: 10px; }
.theory ul { margin: 0 0 12px; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; }
.theory b { color: var(--o-ink); }
.ttable { margin: 8px 0 14px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.ttable th { background: var(--g-soft); color: var(--g-ink); }
.texs { display: flex; flex-direction: column; gap: 8px; margin: 8px 0 12px; }
.tex { display: flex; justify-content: space-between; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 12px; background: var(--g-soft); }
.tex .en { font-size: 19px; }
.tex mark { background: var(--sun); color: #2B1600; border-radius: 4px; padding: 0 2px; }
.ttips div { padding: 8px 12px; border-radius: 10px; background: var(--o-soft); margin-top: 6px; }

/* cửa hàng quà */
.gcats { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.gcat { border: 1.5px solid var(--line); background: var(--card); border-radius: 999px; padding: 6px 14px; font-weight: 600; cursor: pointer; font-size: 14px; }
.gcat.on { background: var(--g); border-color: var(--g); color: #04210E; }
.gifts { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
.gift { border: 1.5px solid var(--line); border-radius: 16px; padding: 12px; display: flex; flex-direction: column; gap: 6px; background: var(--card); }
.gift .gpic { height: 96px; border-radius: 12px; background: var(--o-soft) center/cover no-repeat; display: grid; place-items: center; font-size: 52px; }
.gift b { font-family: var(--f-display); font-weight: 600; }
.gift .cost { font: 700 17px var(--f-display); color: var(--o-ink); }
.gift .b { margin-top: auto; }
.rcode { font: 700 34px var(--f-display); letter-spacing: .12em; color: var(--o-ink); background: var(--o-soft); border: 2px dashed var(--o); border-radius: 14px; padding: 10px 18px; display: inline-block; }
.red { display: grid; grid-template-columns: auto 1fr auto; gap: 10px 12px; align-items: center; padding: 12px 0; border-top: 1px dashed var(--line); }
.red:first-of-type { border-top: 0; }
.red .em { font-size: 30px; }
@media (max-width: 560px) { .red { grid-template-columns: auto 1fr; } .red > :last-child { grid-column: 1 / -1; } }

/* ---------- giáo viên ---------- */
.ed-row { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 8px; align-items: start; padding: 10px 0; border-top: 1px dashed var(--line); }
.ed-row:first-of-type { border-top: 0; }
.ed-row.v { grid-template-columns: 70px 1fr 1fr 1fr 1.4fr auto; }
.ed-row .acts-mini { display: flex; gap: 4px; }
.ed-row input { min-height: 40px; padding: 8px 10px; font-size: 15px; }
@media (max-width: 760px) { .ed-row, .ed-row.v { grid-template-columns: 1fr; } }
.qed { border: 1px solid var(--line); border-radius: 14px; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.qed .ops { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 8px; }
.qed .op { display: flex; gap: 6px; align-items: center; }
.qlist { display: grid; gap: 10px; }
.src-files { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.steps { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.steps span { font: 600 13px var(--f-display); padding: 4px 12px; border-radius: 999px; background: var(--g-soft); color: var(--g-ink); }
.steps span.o { background: var(--o-soft); color: var(--o-ink); }
.lib-item { padding: 14px 0; border-top: 1px dashed var(--line); display: flex; flex-direction: column; gap: 6px; }
.lib-item:first-of-type { border-top: 0; }
.confirm { display: inline-flex; gap: 6px; align-items: center; flex-wrap: wrap; background: var(--bad-soft); padding: 4px 6px 4px 10px; border-radius: 12px; font-size: 14px; font-weight: 600; color: var(--bad); }
.confirm.o { background: var(--o-soft); color: var(--o-ink); }
.pv-bar { background: var(--o); color: var(--on-o); border-radius: 14px; padding: 10px 14px; display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; justify-content: space-between; font-weight: 600; margin-bottom: 14px; }
.pv-bar .b { background: rgba(255, 255, 255, .6); color: var(--on-o); }
.print-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.pcard { border: 2px dashed var(--line); border-radius: 14px; padding: 12px; display: flex; flex-direction: column; gap: 4px; }
.pcard img { height: 26px; align-self: flex-start; }
.pcard .code { font-size: 22px; color: var(--o-ink); }

/* ---------- kho tài liệu ---------- */
.tag.pg { background: color-mix(in srgb, var(--o) 16%, var(--card)); color: var(--o-ink); }
.doc { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 8px 12px; align-items: start; padding: 12px 0; border-top: 1px dashed var(--line); }
h2 + .doc, h3 + .doc, summary + .doc { border-top: 0; }
.doc .dic { width: 42px; height: 42px; border-radius: 12px; background: var(--g-soft); display: grid; place-items: center; font-size: 21px; }
.doc.pin .dic { background: var(--o-soft); }
.doc .dmain { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.doc .dt { font: 600 16px var(--f-display); color: var(--ink); text-decoration: none; overflow-wrap: anywhere; }
.doc .dt:hover { color: var(--g-ink); text-decoration: underline; }
.doc .ddesc { font-size: 14px; }
.doc audio { margin-top: 4px; }
.doc .dact { justify-content: flex-end; }
@media (max-width: 640px) { .doc { grid-template-columns: auto minmax(0, 1fr); } .doc .dact { grid-column: 1 / -1; justify-content: flex-start; } }
.docform { margin-top: 8px; padding: 12px; border: 1.5px dashed var(--line); border-radius: 14px; }

/* ---------- đọc hiểu ---------- */
.passage { margin-top: 10px; padding: 16px 18px; border-radius: 14px; border-left: 5px solid var(--g); background: color-mix(in srgb, var(--g-soft) 55%, var(--card)); }
.passage p { font: 400 19px/1.75 var(--f-en); margin: 0 0 12px; }
.passage p:last-child { margin-bottom: 0; }
.rq { padding: 14px 0; border-top: 1px dashed var(--line); }
.rq:first-of-type { border-top: 0; }
.rq > p { font-size: 18px; }
.rq .opts { margin-top: 8px; gap: 8px; }
.rq .opt { font-size: 17px; min-height: 48px; padding: 10px 14px; }
.opt.sel { border-color: var(--o); background: var(--o-soft); }
.opt.sel .k { background: var(--o); color: var(--on-o); }

/* ---------- hiệu ứng ---------- */
#toast { position: fixed; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%) translateY(20px); background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 999px; font-weight: 600; font-size: 15px; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 90; max-width: calc(100% - 32px); text-align: center; }
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.bad { background: var(--bad); color: var(--on-bad); }
#fx { position: fixed; inset: 0; pointer-events: none; z-index: 80; width: 100%; height: 100%; }
.pop { position: fixed; z-index: 85; pointer-events: none; font: 700 22px var(--f-display); color: var(--o-ink); background: var(--card); border: 2px solid var(--o); border-radius: 999px; padding: 4px 14px; animation: pop 1.3s ease-out forwards; }
@keyframes pop { 0% { opacity: 0; transform: translateY(10px) scale(.8); } 15% { opacity: 1; transform: translateY(0) scale(1.05); } 80% { opacity: 1; } 100% { opacity: 0; transform: translateY(-46px) scale(1); } }
@media (prefers-reduced-motion: reduce) { .pop { animation-duration: 2s; } .b, .bar > i { transition: none; } }
.spin { width: 18px; height: 18px; border-radius: 50%; border: 3px solid currentColor; border-right-color: transparent; animation: spin .8s linear infinite; display: inline-block; vertical-align: -3px; }
@keyframes spin { to { transform: rotate(360deg); } }
.foot { text-align: center; color: var(--mute); font-size: 13px; padding-bottom: 28px; }

@media print {
  .top, .demo-bar, .no-print, #toast { display: none !important; }
  body { background: #FFFFFF; }
  .card { box-shadow: none; border: 0; }
}