/* ==========================================================================
   BOSTON STUDY HUB ACADEMY — accounts, pathway, unit player
   ========================================================================== */

/* ---------------- accounts ---------------- */
.auth-screen{
  position:fixed;inset:0;z-index:200;display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  background:var(--bg);overflow-y:auto;
}
.auth-brand{
  padding:56px clamp(28px,5vw,72px);display:flex;flex-direction:column;justify-content:center;
  background:
    radial-gradient(700px 420px at 90% -10%, rgba(94,234,212,.16), transparent 60%),
    radial-gradient(600px 380px at 0% 110%, rgba(96,165,250,.12), transparent 60%),
    linear-gradient(160deg,#0E1626,#080C14 65%);
  border-right:1px solid var(--line);position:relative;overflow:hidden;
}
.auth-brand::after{
  content:'';position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  border:1px solid rgba(94,234,212,.14);
}
.ab-top{display:flex;align-items:center;gap:12px;margin-bottom:44px}
.ab-name{font-family:var(--display);font-size:20px;line-height:1.05}
.ab-sub{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--dim-2)}
.auth-brand h1{
  font-family:var(--display);font-size:clamp(32px,3.6vw,48px);font-weight:500;line-height:1.08;
  letter-spacing:-.02em;margin:0 0 16px;max-width:14ch;
}
.auth-brand h1 em{font-style:italic;color:var(--mint)}
.auth-brand p{color:#B7C4D8;font-size:15px;max-width:48ch}
.ab-list{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:12px;max-width:52ch}
.ab-list li{font-size:13.6px;color:#AEBCCF;padding-left:26px;position:relative}
.ab-list li::before{content:'✓';position:absolute;left:0;top:0;color:var(--mint);font-weight:700}
.ab-list b{color:#fff}
.ab-foot{margin-top:36px;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim-2);
  border-top:1px solid var(--line);padding-top:14px}

.auth-panel{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 22px;gap:16px}
.auth-card{
  width:min(430px,100%);background:linear-gradient(170deg,#121A28,#0A0F18);
  border:1px solid var(--line-2);border-radius:20px;padding:26px;box-shadow:0 30px 80px -40px #000;
}
.auth-seg{width:100%;margin-bottom:20px}
.auth-seg button{flex:1;padding:9px 10px}
.auth-card .field{margin-bottom:14px}
.auth-submit{width:100%;margin-top:6px}
.auth-error{
  background:var(--rose-soft);border:1px solid rgba(251,113,133,.35);color:#FFC9D1;
  border-radius:8px;padding:9px 12px;font-size:12.6px;margin-bottom:12px;
}
.auth-offline{display:block;width:100%;margin-top:14px;color:var(--dim);font-size:12.5px;text-align:center;padding:8px}
.auth-offline:hover{color:var(--mint)}
.auth-note{font-size:11px;color:var(--dim-2);line-height:1.5;margin-top:12px;text-align:center}
.auth-small{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim-2)}
body.auth-mode{overflow:hidden}

.acct{display:flex;align-items:center;gap:9px;padding:9px 10px;border:1px solid var(--line);border-radius:11px;background:rgba(255,255,255,.02)}
.acct-ava{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--mint-soft);
  color:var(--mint);font-weight:700;font-size:12px;flex:0 0 auto}
.acct-txt{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.acct-txt b{font-size:12.4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.acct-txt span{font-size:10px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim-2)}
.acct-out{margin-left:auto;color:var(--dim-2);font-size:14px;padding:2px 4px;border-radius:6px}
.acct-out:hover{color:var(--rose);background:rgba(251,113,133,.1)}

.nav-count{font-size:9.5px;color:var(--dim-2);border:1px solid var(--line);border-radius:999px;padding:0 6px;margin-left:auto}
.nav a.active .nav-count{color:var(--mint);border-color:rgba(94,234,212,.35)}

/* ---------------- pathway ---------------- */
.path-hero{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:26px;align-items:center;
  border:1px solid var(--line);border-radius:20px;padding:26px 28px;
  background:
    radial-gradient(520px 260px at 92% -10%, rgba(94,234,212,.16), transparent 60%),
    linear-gradient(160deg,#101828,#0A0F19 65%);
}
.path-hero h2{font-family:var(--display);font-size:clamp(22px,2.6vw,30px);font-weight:500;margin:4px 0 6px}
.path-hero p{color:#B7C4D8;font-size:14px;max-width:58ch;margin-bottom:14px}
.path-hero-right{display:flex;flex-direction:column;align-items:center;gap:12px}
.path-stats{display:flex;gap:20px;justify-content:center}
.path-stat{text-align:center}
.path-stat b{font-family:var(--display);font-size:22px;display:block;line-height:1}
.path-stat b span{font-size:12px;color:var(--dim-2)}
.path-stat small{font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim-2)}

.term{margin-top:30px}
.term-head{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.term-head h3{font-size:16px;font-weight:600}
.term-badge{font-size:10px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;padding:5px 10px;border-radius:7px;border:1px solid;white-space:nowrap}
.term-badge.mint{color:var(--mint);border-color:rgba(94,234,212,.32);background:var(--mint-soft)}
.term-badge.amber{color:var(--amber);border-color:rgba(251,191,36,.3);background:var(--amber-soft)}
.term-badge.violet{color:var(--violet);border-color:rgba(167,139,250,.3);background:var(--violet-soft)}
.term-prog{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--dim)}
.term-prog b{font-family:var(--mono);font-size:12px}

.unit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:10px}
.unit-card{
  display:flex;flex-direction:column;gap:4px;padding:14px;border:1px solid var(--line);
  border-radius:13px;background:linear-gradient(170deg,var(--panel),var(--bg-2));
  min-height:132px;transition:.16s;position:relative;overflow:hidden;
}
.unit-card:hover{transform:translateY(-2px);border-color:var(--line-2)}
.unit-card.open{border-color:rgba(251,191,36,.32);box-shadow:inset 0 0 0 1px rgba(251,191,36,.08)}
.unit-card.done{border-color:rgba(94,234,212,.28)}
.unit-card.done::after{content:'';position:absolute;inset:0;background:linear-gradient(160deg,rgba(94,234,212,.06),transparent 55%);pointer-events:none}
.unit-card.locked{opacity:.66;filter:saturate(.7)}
.unit-card.locked:hover{transform:none}
.uc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}
.uc-n{font-family:var(--mono);font-size:11px;color:var(--dim-2);letter-spacing:.06em}
.unit-card.done .uc-n{color:var(--mint)}
.uc-mark{font-size:10px;font-weight:700;color:var(--mint);letter-spacing:.04em}
.uc-mark.open{color:var(--amber);text-transform:uppercase;letter-spacing:.12em}
.uc-mark.lock{opacity:.6;font-size:11px}
.unit-card b{font-size:13.4px;line-height:1.25;position:relative;z-index:1}
.uc-sub{font-size:11.5px;color:var(--dim);line-height:1.35;flex:1;position:relative;z-index:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.uc-type{font-size:9px;letter-spacing:.13em;text-transform:uppercase;color:var(--dim-2);margin-top:2px}

/* ---------------- unit player ---------------- */
.unit-head{margin-bottom:20px}
.unit-head h1{font-family:var(--display);font-size:clamp(26px,3.4vw,38px);font-weight:500;margin:12px 0 8px;letter-spacing:-.02em}
.unit-obj{color:#C3CFDF;font-size:14.5px;max-width:80ch}
.unit-tabs{display:flex;gap:2px;margin-top:18px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.unit-tabs button{
  padding:9px 15px;font-size:13.2px;color:var(--dim);border-bottom:2px solid transparent;
  margin-bottom:-1px;font-weight:500;
}
.unit-tabs button:hover{color:var(--text)}
.unit-tabs button.on{color:var(--mint);border-color:var(--mint)}

.theory-block{display:grid;grid-template-columns:30px minmax(0,1fr);gap:12px;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.06)}
.theory-block:last-child{border-bottom:0}
.theory-n{font-family:var(--mono);font-size:11px;color:var(--mint);padding-top:3px}
.theory-block h3{font-size:14.5px;margin-bottom:5px}
.theory-block p{font-size:13.9px;color:#BCC9DA;margin:0;line-height:1.62}

.tip-list{list-style:none;padding:0;margin:0;display:grid;gap:9px}
.tip-list li{font-size:13.4px;color:#C3CFDF;padding-left:18px;position:relative}
.tip-list li::before{content:'';position:absolute;left:0;top:7px;width:6px;height:6px;border-radius:50%;background:var(--amber)}

.grammar-rule{font-size:14.4px;color:#D6E0EE;background:rgba(94,234,212,.06);border-left:2px solid var(--mint);padding:10px 14px;border-radius:0 8px 8px 0;margin:0}
.examples{display:grid;gap:10px;margin-top:14px}
.ex-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 0;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.ex-bad,.ex-good{padding:9px 12px;font-size:13.2px;display:flex;gap:8px;align-items:flex-start}
.ex-bad{background:rgba(251,113,133,.07);color:#F3C5CC}
.ex-bad span{color:var(--rose);font-weight:700}
.ex-good{background:rgba(94,234,212,.07);color:#CFF5EC}
.ex-good span{color:var(--mint);font-weight:700}
.ex-why{grid-column:1/-1;padding:7px 12px;font-size:11.8px;color:var(--dim);border-top:1px solid var(--line);background:rgba(255,255,255,.015)}

.vocab-list{display:grid;gap:0}
.v-row{padding:10px 0;border-bottom:1px dashed rgba(255,255,255,.06)}
.v-row:last-child{border-bottom:0}
.v-top{display:flex;align-items:baseline;gap:8px}
.v-top b{font-size:14px}
.v-pos{font-size:10px;color:var(--dim-2);text-transform:uppercase;letter-spacing:.08em}
.v-def{font-size:12.8px;color:#C3CFDF;margin:2px 0}
.v-col{font-size:11.8px;color:var(--dim)}.v-col b{color:var(--mint);font-weight:600}
.v-ex{font-size:11.8px;color:var(--dim-2);font-style:italic;margin-top:2px}

.idiom-list{display:grid;gap:12px}
.id-row{display:flex;flex-direction:column;gap:2px;padding-bottom:10px;border-bottom:1px dashed rgba(255,255,255,.06)}
.id-row:last-child{border-bottom:0}
.id-row b{font-size:13.4px;color:var(--violet)}
.id-row span{font-size:12.4px;color:#C3CFDF}
.id-row em{font-size:11.8px;color:var(--dim-2)}

.task-box{font-size:13.8px;color:#E4EBF5;background:rgba(251,191,36,.06);border-left:2px solid var(--amber);padding:10px 14px;border-radius:0 8px 8px 0}
.check-list{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.check-list li{font-size:13px;color:#C3CFDF;padding-left:18px;position:relative}
.check-list li::before{content:'☐';position:absolute;left:0;color:var(--mint)}
.speak-list{margin:0;padding-left:18px;color:#C3CFDF;font-size:13.4px}
.speak-list li{margin-bottom:7px}
.phrase-chip{font-size:11.6px;color:var(--violet);border:1px solid rgba(167,139,250,.28);background:var(--violet-soft);padding:3px 9px;border-radius:999px}

.quiz-result{display:flex;align-items:center;gap:16px;margin-top:16px;padding:16px 18px;border-radius:12px;border:1px solid}
.quiz-result.pass{background:rgba(94,234,212,.08);border-color:rgba(94,234,212,.3)}
.quiz-result.fail{background:rgba(251,191,36,.07);border-color:rgba(251,191,36,.3)}
.qr-score{font-family:var(--display);font-size:38px;line-height:1;color:var(--mint)}
.quiz-result.fail .qr-score{color:var(--amber)}
.quiz-result b{font-size:13.5px;display:block;margin-bottom:2px}

@media (max-width:980px){
  .auth-screen{grid-template-columns:minmax(0,1fr)}
  .auth-brand{display:none}
  .path-hero{grid-template-columns:minmax(0,1fr);gap:18px}
  .path-hero-right{flex-direction:row;justify-content:flex-start;gap:18px;flex-wrap:wrap;align-items:center}
  .path-stats{justify-content:flex-start}
  .ex-row{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .unit-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .unit-card{min-height:118px;padding:11px}
  .unit-card b{font-size:12.4px}
  .uc-sub{display:none}
}

.auth-screen[hidden]{display:none!important}
.ex-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.ex-card{display:flex;flex-direction:column;gap:4px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:var(--shadow-sm);transition:.15s}
.ex-card:hover{transform:translateY(-2px);border-color:#e6cfc9;box-shadow:0 14px 30px -20px rgba(15,23,42,.45)}
.ex-card.locked{opacity:.6}
.ex-card.locked:hover{transform:none}
.ex-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:2px}
.ex-card b{font-size:13px;line-height:1.3}
.ex-card .mini{font-size:11px}
#runnerWrap .opts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
#runnerWrap .opt{padding:11px 13px;align-items:center;line-height:1.45}
#runnerWrap .qcard{padding:14px 16px}
@media (max-width:820px){#runnerWrap .opts{grid-template-columns:1fr}}
.g-area{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm);overflow:hidden}
.g-area summary{display:flex;align-items:center;gap:12px;padding:14px 16px;cursor:pointer;list-style:none}
.g-area summary::-webkit-details-marker{display:none}
.g-area summary::after{content:'⌄';margin-left:6px;color:var(--dim-2);font-size:14px;transition:transform .2s}
.g-area[open] summary::after{transform:rotate(180deg)}
.g-num{font-family:var(--mono);font-size:11px;color:var(--dim-2)}
.g-title{font-weight:600;flex:1;font-size:14px;color:var(--text)}
.g-body{padding:0 16px 16px;border-top:1px solid var(--line)}
.g-tip{font-size:12.8px;color:var(--dim);margin:10px 0 0}
.g-items{display:grid;gap:8px;margin:12px 0}
.g-items .qcard{padding:12px 14px;box-shadow:none}
.g-items .qh{font-size:13.4px}
.g-items .opts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.g-items .opt{padding:10px 12px;align-items:center;line-height:1.45}
@media (max-width:820px){.g-items .opts{grid-template-columns:1fr}}
.g-done{display:none}
.is-done{display:none}
.retry-note{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:10px;padding:10px 12px;border-radius:10px;background:var(--panel-2);border:1px solid var(--line);font-size:12.8px;color:#3b4558}
.retry-note.pass{background:#EAF9F3;border-color:#C4EBDD}
.quiz-result b{color:var(--text)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.opt{position:relative}
[data-eo] input,[data-go] input,[data-opt] input{position:absolute;opacity:0;width:1px;height:1px;margin:0;pointer-events:none}
.opt:focus-within{box-shadow:0 0 0 2px var(--brand);border-color:var(--brand)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.error-item{padding:14px 16px}
.error-q{font-size:14px;margin:0 0 6px}
.error-answer{display:inline-block;font-size:12.6px;color:#0B6B4E;background:#E9F8F2;border:1px solid #C4EBDD;padding:3px 9px;border-radius:7px;margin-bottom:6px}
.chip-done{font-size:11px;color:var(--dim);border:1px solid var(--line);border-radius:999px;padding:3px 8px;background:#fff}
.clip-row{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);flex-wrap:wrap}
.clip-meta{display:flex;flex-direction:column;min-width:160px;flex:1}
.clip-meta b{font-size:13px}
.clip-meta span{font-size:11px;color:var(--dim-2)}
.clip-row audio{height:34px;max-width:320px;flex:1}
.paper-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:12px}
.paper-head h1{font-family:var(--display);font-size:clamp(24px,3vw,34px);font-weight:500;margin:0 0 4px}
.paper-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 14px;margin-bottom:14px;position:sticky;top:58px;z-index:20}
.palette-label{font-size:11px;color:var(--dim-2);white-space:nowrap}
.palette{display:flex;gap:4px;flex-wrap:wrap;max-width:560px}
.pdot{width:24px;height:24px;border-radius:6px;border:1px solid var(--line);font-size:10px;display:grid;place-items:center;background:#fff;color:var(--dim)}
.pdot.ans{background:var(--brand-soft);border-color:#e2b9b4;color:var(--brand);font-weight:700}
.pdot.flag{border-color:var(--amber);background:#FFF6E3}
.pdot.cur{outline:2px solid var(--brand);outline-offset:1px}
.review-row{padding:9px 0;border-bottom:1px dashed var(--line)}
.review-row.bad .review-q{color:#8E3035}
.review-q{display:flex;gap:9px;font-size:13.2px}
.review-a{font-size:11.5px;color:var(--dim);margin-top:2px;padding-left:24px}
.psep{width:1px;align-self:stretch;background:var(--line);margin:0 4px}
.palette{max-width:640px}
.lesson-grid{display:grid;gap:10px}
.lesson-stage{display:grid;grid-template-columns:82px minmax(0,1fr) 180px;gap:14px;padding:14px 16px;background:#fff;border:1px solid var(--line);border-radius:14px}
.lesson-time{font-family:var(--mono);font-size:12px;color:var(--brand);padding-top:2px}
.lesson-time span{display:block;font-size:10px;color:var(--dim-2);margin-top:3px}
.lesson-main h3{margin:0;font-size:15px}
.lesson-teacher,.lesson-student{font-size:12.4px;color:var(--dim);margin:5px 0 0}
.lesson-teacher b,.lesson-student b{color:var(--ink)}
.lesson-body{margin-top:8px;font-size:13px}
.lesson-list{margin:4px 0 0 18px;font-size:13px;line-height:1.6}
.lesson-reveal{font-size:10px;border:1px solid var(--line);background:#fff;border-radius:6px;padding:1px 6px;color:var(--brand);cursor:pointer;margin-left:6px}
.lesson-model{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:8px}
.lesson-model>div{background:var(--bg-2);border-radius:9px;padding:8px 10px}
.lesson-model p{margin:3px 0 0;font-size:13px}
.lesson-controls{display:flex;flex-direction:column;gap:6px;align-items:flex-end}
.lesson-timer .timerbar{flex-direction:column;gap:2px;padding:0}
.video-frame{position:relative;padding-top:56.25%;border-radius:12px;overflow:hidden;background:#000}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
@media(max-width:900px){.lesson-stage{grid-template-columns:1fr}.lesson-controls{flex-direction:row;align-items:center;justify-content:flex-start}.lesson-model{grid-template-columns:1fr}}
.check-row{display:flex;align-items:flex-start;gap:9px;padding:6px 0;font-size:13.2px;border-bottom:1px dashed var(--line)}
.check-row input{margin-top:3px;accent-color:var(--brand)}
#tTarget{white-space:normal}
@media(max-width:720px){.tbl{display:block;overflow-x:auto;white-space:nowrap}.split{grid-template-columns:1fr!important}.lesson-stage{grid-template-columns:1fr}}
.ed-row{display:grid;gap:6px;padding:10px 0;border-bottom:1px dashed var(--line)}
.ed-row .ed-del{justify-self:end}
.ed-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}
@media(max-width:720px){.ed-grid{grid-template-columns:1fr 1fr}}