/* Dorabot Cung Hoc · Sinh vien (sinh-vien.php, assets/uni.js) — giao dien nguoi lon, gon, de doc lau. */
:root {
  --bg: #F5F7F6; --card: #fff; --ink: #14201E; --ink2: #4A5B57; --mut: #7A8A86; --line: #E2E8E6;
  --teal: #1A7F75; --teal-d: #12645C; --teal-l: #E3F3F1; --or: #E8833A; --or-l: #FDF0E6; --red: #C8463D; --red-l: #FBEAE8;
  --ok: #2E8B57; --ok-l: #E5F4EB; --blue: #2F6FB3; --blue-l: #E7F0FA; --pur: #6B4FB3; --pur-l: #EFEAFA;
  --r: 14px; --sh: 0 1px 2px rgba(20,32,30,.06), 0 4px 14px rgba(20,32,30,.05);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', sans-serif; -webkit-text-size-adjust: 100%; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 24px; margin: 0 0 4px; line-height: 1.25; }
h2 { font-size: 19px; margin: 0 0 10px; }
h3 { font-size: 16px; margin: 18px 0 8px; }
p { margin: 0 0 10px; }
.boot { display: grid; place-items: center; height: 100vh; font-size: 54px; }
.muted { color: var(--mut); } .ink2 { color: var(--ink2); } .small { font-size: 13px; } .tiny { font-size: 12px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; } .grow { flex: 1; min-width: 0; } .between { justify-content: space-between; }
.col { display: flex; flex-direction: column; gap: 10px; }
.mt { margin-top: 14px; } .mt2 { margin-top: 24px; } .mb { margin-bottom: 14px; }
.hide { display: none !important; }

/* khung */
.shell { display: grid; grid-template-columns: 236px 1fr; min-height: 100vh; }
.nav { background: #fff; border-right: 1px solid var(--line); padding: 16px 10px; display: flex; flex-direction: column; gap: 2px; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; gap: 10px; align-items: center; padding: 4px 8px 14px; color: var(--ink); font-weight: 800; }
.brand img { width: 34px; height: 34px; }
.brand small { display: block; font-weight: 600; color: var(--teal); font-size: 12px; }
.nav .it { display: flex; gap: 10px; align-items: center; padding: 9px 10px; border-radius: 10px; color: var(--ink2); font-weight: 600; }
.nav .it:hover { background: var(--bg); text-decoration: none; }
.nav .it.on { background: var(--teal-l); color: var(--teal-d); }
.nav .it .i { width: 22px; text-align: center; }
.nav .it .soon { margin-left: auto; font-size: 11px; color: var(--mut); font-weight: 500; }
.nav .quota { margin: 10px 6px 4px; padding: 10px; border: 1px solid var(--line); border-radius: 12px; font-size: 12.5px; color: var(--ink2); }
.bar { height: 6px; background: var(--line); border-radius: 9px; overflow: hidden; margin: 6px 0 4px; }
.bar > i { display: block; height: 100%; background: var(--teal); border-radius: 9px; }
.main { padding: 26px 30px 90px; max-width: 1060px; width: 100%; }
.mtop { display: none; }
.tabs { display: none; }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .nav { display: none; }
  .main { padding: 12px 16px 96px; }
  .mtop { display: flex; justify-content: space-between; align-items: center; margin: 0 0 12px; }
  .mtop .brand { padding: 0; }
  .tabs { display: flex; position: fixed; left: 0; right: 0; bottom: 0; background: #fff; border-top: 1px solid var(--line); z-index: 20; padding: 4px 4px calc(4px + env(safe-area-inset-bottom)); }
  .tabs a { flex: 1; text-align: center; font-size: 11px; color: var(--mut); padding: 4px 0; font-weight: 600; }
  .tabs a .i { display: block; font-size: 19px; line-height: 1.3; }
  .tabs a.on { color: var(--teal-d); }
  h1 { font-size: 21px; }
}

/* the */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 16px; box-shadow: var(--sh); }
.card + .card { margin-top: 12px; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.grid2 { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
@media (max-width: 700px) { .grid2 { grid-template-columns: 1fr; } }
.ph { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.chip { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; border-radius: 99px; background: var(--bg); border: 1px solid var(--line); font-size: 12.5px; font-weight: 600; color: var(--ink2); white-space: nowrap; }
.chip.teal { background: var(--teal-l); border-color: transparent; color: var(--teal-d); }
.chip.or { background: var(--or-l); border-color: transparent; color: #9A4F14; }
.chip.red { background: var(--red-l); border-color: transparent; color: var(--red); }
.chip.ok { background: var(--ok-l); border-color: transparent; color: var(--ok); }
.chip.blue { background: var(--blue-l); border-color: transparent; color: var(--blue); }
.chip.pur { background: var(--pur-l); border-color: transparent; color: var(--pur); }
.empty { text-align: center; padding: 30px 16px; color: var(--ink2); }
.empty .big { font-size: 40px; }
.note { background: var(--blue-l); color: #1D4A78; border-radius: 12px; padding: 10px 12px; font-size: 13.5px; }
.note.warn { background: var(--or-l); color: #7A3F10; }
.note.bad { background: var(--red-l); color: #8A2A23; }

/* nut, o nhap */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 0; border-radius: 11px; padding: 10px 16px; font: inherit; font-weight: 700; cursor: pointer; background: var(--teal); color: #fff; text-decoration: none !important; }
.btn:hover { background: var(--teal-d); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn.ghost:hover { background: var(--bg); }
.btn.or { background: var(--or); } .btn.or:hover { background: #CF6F28; }
.btn.danger { background: var(--red); }
.btn.sm { padding: 6px 11px; font-size: 13.5px; border-radius: 9px; }
.btn.block { width: 100%; }
.in { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 9px 11px; font: inherit; background: #fff; color: var(--ink); }
.in:focus { outline: 2px solid var(--teal-l); border-color: var(--teal); }
textarea.in { min-height: 90px; resize: vertical; line-height: 1.6; }
.f { display: block; margin-bottom: 12px; }
.f > span { display: block; font-weight: 600; font-size: 13.5px; margin-bottom: 4px; color: var(--ink2); }
.chk { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; }
.chk input { margin-top: 4px; }
.seg { display: inline-flex; background: var(--bg); border: 1px solid var(--line); border-radius: 11px; padding: 3px; gap: 2px; flex-wrap: wrap; }
.seg button { border: 0; background: transparent; padding: 7px 12px; border-radius: 8px; font: inherit; font-weight: 600; color: var(--ink2); cursor: pointer; }
.seg button.on { background: #fff; color: var(--teal-d); box-shadow: var(--sh); }
.err { color: var(--red); font-size: 13.5px; min-height: 18px; }

/* modal, toast */
.modal { position: fixed; inset: 0; background: rgba(10,20,18,.45); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal .box { background: #fff; border-radius: 16px; padding: 20px; width: min(560px, 100%); max-height: 90vh; overflow: auto; }
.modal .foot { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; flex-wrap: wrap; }
.toast { position: fixed; left: 50%; bottom: 80px; transform: translateX(-50%); background: #14201E; color: #fff; padding: 10px 16px; border-radius: 12px; z-index: 60; max-width: 92vw; font-size: 14px; }

/* dang nhap, onboarding */
.login { min-height: 100vh; display: grid; grid-template-columns: 1.1fr 1fr; gap: 30px; align-items: center; max-width: 1020px; margin: 0 auto; padding: 30px 20px; }
.login h1 { font-size: 30px; margin: 10px 0; }
.pitch { padding-left: 0; list-style: none; } .pitch li { margin: 8px 0; padding-left: 4px; }
.or-sep { text-align: center; color: var(--mut); font-size: 13px; margin: 14px 0; }
/* Vao bang Zalo (uni.js zaloLogin) */
.zl-in { margin-top: 12px; border: 1px solid #CFE0FF; background: #F3F8FF; border-radius: 12px; padding: 12px 14px; font-size: 14px; }
.zl-in .zl-btn { display: block; text-align: center; background: #0068FF; color: #fff; border-radius: 999px; padding: 10px 14px; font-weight: 700; text-decoration: none; margin: 8px 0 6px; }
.zl-in .zl-kw { font-weight: 800; background: #fff; border: 1px dashed #0068FF; border-radius: 6px; padding: 0 6px; }
.zl-in p { margin: 0; }
@media (max-width: 800px) { .login { grid-template-columns: 1fr; padding-top: 20px; } }
.onb { max-width: 620px; margin: 20px auto; }

/* trang chu muc tieu */
.goal { background: linear-gradient(135deg, #1A7F75, #22958A); color: #fff; border: 0; }
.goal .muted, .goal .small { color: rgba(255,255,255,.82); }
.goal .big { font-size: 34px; font-weight: 800; line-height: 1.1; }
.goal .gauge { height: 10px; background: rgba(255,255,255,.25); border-radius: 9px; position: relative; margin: 12px 0 6px; }
.goal .gauge i { position: absolute; top: 0; bottom: 0; background: rgba(255,255,255,.55); border-radius: 9px; }
.goal .gauge b { position: absolute; top: -4px; width: 3px; height: 18px; background: #FFD08A; border-radius: 2px; }
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; margin-top: 12px; }
.skills .sk { background: rgba(255,255,255,.14); border-radius: 10px; padding: 8px 10px; }
.skills .sk b { display: block; font-size: 18px; }
.todo { display: flex; gap: 12px; align-items: center; padding: 12px 0; border-top: 1px solid var(--line); }
.todo:first-child { border-top: 0; }
.todo .ic { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-size: 20px; background: var(--teal-l); flex: none; }
.todo.done { opacity: .55; }
.tile { display: block; color: inherit; }
.tile:hover { text-decoration: none; border-color: var(--teal); }
.tile .ic { font-size: 26px; }
.list .li { display: flex; gap: 10px; align-items: center; padding: 11px 0; border-top: 1px solid var(--line); color: inherit; }
.list .li:first-child { border-top: 0; }
.list a.li:hover { text-decoration: none; background: var(--bg); }

/* lam de */
.runner-top { position: sticky; top: 0; z-index: 15; background: var(--bg); padding: 8px 0 10px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.timer { font-variant-numeric: tabular-nums; font-weight: 800; padding: 6px 12px; border-radius: 10px; background: #fff; border: 1px solid var(--line); }
.timer.low { color: var(--red); border-color: var(--red); }
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 16px; align-items: start; }
.split .passage { position: sticky; top: 70px; max-height: calc(100vh - 90px); overflow: auto; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .split .passage { top: 104px; max-height: 40vh; z-index: 5; box-shadow: 0 6px 14px rgba(20,32,30,.12); } }
.passage { white-space: pre-wrap; font-size: 15.5px; line-height: 1.75; }
.passage .blank { display: inline-block; min-width: 46px; text-align: center; border-bottom: 2px solid var(--teal); font-weight: 700; color: var(--teal-d); }
.q { padding: 12px 0; border-top: 1px dashed var(--line); }
.q:first-child { border-top: 0; }
.q .qn { display: inline-grid; place-items: center; min-width: 28px; height: 28px; border-radius: 8px; background: var(--teal-l); color: var(--teal-d); font-weight: 800; font-size: 13px; margin-right: 6px; padding: 0 6px; }
.opts { display: grid; gap: 6px; margin-top: 8px; }
.opt { display: flex; gap: 8px; align-items: flex-start; border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; cursor: pointer; background: #fff; }
.opt:hover { border-color: var(--teal); }
.opt input { margin-top: 4px; }
.opt.sel { border-color: var(--teal); background: var(--teal-l); }
.opt.right { border-color: var(--ok); background: var(--ok-l); }
.opt.wrong { border-color: var(--red); background: var(--red-l); }
.opts.inline { grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); }
.shared { background: var(--bg); border-radius: 10px; padding: 10px 12px; font-size: 14px; }
.listen { display: flex; gap: 10px; align-items: center; background: var(--blue-l); border-radius: 12px; padding: 10px 12px; margin: 8px 0; flex-wrap: wrap; }
.script { background: var(--bg); border-radius: 10px; padding: 10px 12px; font-size: 14px; margin-top: 8px; }
.script p { margin: 0 0 4px; }
.gtable { border-collapse: collapse; margin: 8px 0; font-size: 14px; }
.gtable td, .gtable th { border: 1px solid var(--line); padding: 5px 9px; text-align: left; }
.gtable th { background: var(--bg); }
.task { white-space: pre-wrap; }
.letter { background: #FFFBF3; border: 1px solid #F1E3C8; border-radius: 10px; padding: 12px; white-space: pre-wrap; font-size: 14.5px; margin: 8px 0; }
.wc { font-size: 13px; color: var(--mut); text-align: right; }
.wc.under { color: var(--red); }
.rec { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 12px; background: var(--bg); border-radius: 12px; margin-top: 10px; }
.rec .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--red); animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .2; } }
.cue { border: 2px solid var(--teal); border-radius: 12px; padding: 12px 14px; margin: 8px 0; }
.cue ul { margin: 6px 0 0; padding-left: 20px; }

/* ket qua */
.score-big { font-size: 40px; font-weight: 800; line-height: 1; color: var(--teal-d); }
.crit { width: 100%; border-collapse: collapse; font-size: 14px; }
.crit td { border-top: 1px solid var(--line); padding: 8px 6px; vertical-align: top; }
.crit td.s { font-weight: 800; white-space: nowrap; width: 54px; }
.fix { padding: 8px 0; border-top: 1px dashed var(--line); font-size: 14px; }
.fix del { color: var(--red); text-decoration: line-through; }
.fix ins { color: var(--ok); text-decoration: none; font-weight: 700; }
.verdict { font-weight: 800; }
.v-correct { color: var(--ok); } .v-partial { color: #B06A12; } .v-wrong { color: var(--red); } .v-no_work { color: var(--mut); }
.step { display: flex; gap: 10px; padding: 8px 0; border-top: 1px dashed var(--line); }
.step .m { flex: none; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: 13px; }
.step.ok .m { background: var(--ok-l); color: var(--ok); }
.step.bad .m { background: var(--red-l); color: var(--red); }
.step.first-err { background: var(--red-l); border-radius: 8px; padding-left: 6px; }
.hint { background: var(--or-l); border-radius: 10px; padding: 10px 12px; margin-top: 8px; }
.md p { margin: 0 0 8px; } .md ul, .md ol { margin: 4px 0 8px; padding-left: 22px; } .md h4 { margin: 10px 0 4px; font-size: 15px; }
.md code { background: var(--bg); padding: 1px 5px; border-radius: 5px; }

/* the on */
.flash { min-height: 220px; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 26px; cursor: pointer; }
.flash .front { font-size: 22px; font-weight: 700; }
.flash .back { margin-top: 14px; color: var(--ink2); font-size: 16px; }
.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 12px; }
.grades .btn { padding: 10px 4px; font-size: 13.5px; }
.chap { border: 1px solid var(--line); border-radius: 12px; margin-top: 10px; background: #fff; }
.chap > summary { padding: 12px 14px; cursor: pointer; font-weight: 700; list-style: none; display: flex; gap: 8px; align-items: center; }
.chap > summary::-webkit-details-marker { display: none; }
.chap[open] > summary { border-bottom: 1px solid var(--line); }
.chap .body { padding: 12px 14px; }
.drop { border: 2px dashed var(--line); border-radius: 14px; padding: 24px; text-align: center; cursor: pointer; background: #fff; }
.drop:hover, .drop.over { border-color: var(--teal); background: var(--teal-l); }
.files .fi { display: flex; gap: 8px; align-items: center; padding: 6px 0; font-size: 14px; }
.thumbs { display: flex; gap: 8px; flex-wrap: wrap; }
.thumbs img { width: 86px; height: 86px; object-fit: cover; border-radius: 10px; border: 1px solid var(--line); }
.ask-a { background: var(--bg); border-radius: 12px; padding: 12px; margin-top: 8px; }
.spin { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--teal-l); border-top-color: var(--teal); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -3px; }
@keyframes spin { to { transform: rotate(360deg); } }
.chart svg { max-width: 100%; height: auto; }

/* Dot H (27/10/2026) — Dora Learn: mau chinh xanh duong #1D5FD1 (truoc dung chung xanh ngoc voi Teacher / LMS) */
:root { --teal: #1D5FD1; --teal-d: #1747A0; --teal-l: #E5EDFB; }
.goal { background: linear-gradient(135deg, #1D5FD1, #3B7BE0); }

/* Tach Dora Uni / Dora Learn (28/10/2026): Uni mau man #C2255C (body[data-product=uni], sinh-vien.php?product=uni) */
body[data-product="uni"] { --teal: #C2255C; --teal-d: #9A1B48; --teal-l: #FBE7EF; }
body[data-product="uni"] .goal { background: linear-gradient(135deg, #C2255C, #E0507F); }
/* chip chon (muc tieu nguoi tu hoc, loc khoa hoc) */
.chip.pick { cursor: pointer; font-size: 13.5px; padding: 6px 12px; font-family: inherit; text-decoration: none; }
.chip.pick.on { background: var(--teal-l); border-color: var(--teal); color: var(--teal-d); }
.chip.pick.mine:not(.on) { border-color: var(--teal-l); }
/* han nop (Uni) */
.list .li.task.done { opacity: .55; }
.list .li.task.done b { text-decoration: line-through; }
.tick { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--line); background: #fff; color: #fff; font-weight: 800; cursor: pointer; display: grid; place-items: center; padding: 0; font-size: 14px; }
.tick:hover { border-color: var(--teal); }
.li.task.done .tick { background: var(--ok); border-color: var(--ok); }
.tick.exam { border: 0; background: var(--teal-l); cursor: default; font-size: 15px; }
/* khoa hoc (Learn) */
.kgrid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.kcard { display: flex; gap: 12px; align-items: flex-start; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 14px; color: inherit; box-shadow: var(--sh); }
.kcard:hover { text-decoration: none; border-color: var(--teal); }
.kcard b { display: block; line-height: 1.35; }
.kcov { flex: none; width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center; font-size: 26px; }
.kprice { color: var(--teal-d); }
.grid > .card + .card, .kgrid > .card + .card { margin-top: 0; }   /* luoi o: khong lech hang */
/* Dora Uni dot 2: lich hoc, ke hoach on thi, dong ho de thu, the nhac */
.note-in { border-color: var(--teal-l); background: linear-gradient(0deg, var(--teal-l), #fff 60%); }
.cls-t { flex: none; width: 54px; font-weight: 800; color: var(--teal-d); font-size: 14px; line-height: 1.2; }
.cls-t small { display: block; font-weight: 600; color: var(--mut); font-size: 12px; }
.tkb-week { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.tkb-week > .card + .card { margin-top: 0; }
.tkb-day.today { border-color: var(--teal); }
.plan .big { font-size: 26px; font-weight: 800; line-height: 1.2; }
.mock-t { position: sticky; top: 8px; z-index: 5; margin: 0 0 12px auto; width: max-content; background: var(--ink); color: #fff; font-weight: 800; padding: 8px 14px; border-radius: 99px; box-shadow: var(--sh); font-variant-numeric: tabular-nums; }
.mock-t.warn { background: var(--or); }
.mock-t.over { background: var(--red); }