/* =====================================================================
   Altlearn — ILDH online course · site styles
   Mobile first. Brand: navy #1B2B4B, amber #E07B3A, cream #F8F4EE.
   Bangla type: Tiro Bangla (self-hosted in assets/). No bold on Bangla,
   no letter-spacing on Bangla.
   ===================================================================== */

@font-face{
  font-family:'Tiro Bangla';
  src:url(assets/TiroBangla-Regular.ttf) format('truetype');
  font-weight:400;font-style:normal;font-display:swap;
}

:root{
  --navy:#1B2B4B; --navy2:#2A3D63; --amber:#E07B3A; --amber-soft:#FBEADF;
  --cream:#F8F4EE; --paper:#FFFFFF; --ink:#1A1A1A; --muted:#6B6B6B;
  --line:#E2DDD6; --grey:#A8A29A; --ok:#2E7D4F; --ok-soft:#E3F2E8;
  --bad:#B3261E; --bad-soft:#FBE4E2;
  --r:12px; --gap:16px;
  --bn:'Tiro Bangla','Kalpurush','Noto Serif Bengali',Georgia,serif;
  --mono:'Courier New',ui-monospace,monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--cream);color:var(--ink);
  font-family:var(--bn);font-size:18px;line-height:1.8;
}
img{max-width:100%}
a{color:var(--navy);text-underline-offset:3px}
b,strong{font-weight:400;color:var(--navy);background:linear-gradient(transparent 62%,var(--amber-soft) 62%)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px}
[hidden]{display:none !important}

/* ---------- top bar ---------- */
.top{
  background:var(--navy);color:var(--cream);position:sticky;top:0;z-index:20;
  display:flex;align-items:center;gap:12px;padding:10px 16px;min-height:56px;
}
.top .logo{height:24px;display:block}
.top .ttl{font-size:15px;line-height:1.5;opacity:.92;flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top .back{
  background:none;border:0;color:var(--cream);font-size:15px;padding:8px 6px;cursor:pointer;min-height:44px;
  display:flex;align-items:center;gap:4px;
}
.top .back svg{width:18px;height:18px}

.wrap{max-width:760px;margin:0 auto;padding:20px 16px 72px}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--amber)}
.eyebrow .bn{font-family:var(--bn);letter-spacing:0;text-transform:none;font-size:14px}
h1,h2,h3{font-weight:400;color:var(--navy);line-height:1.5;margin:0 0 8px}
h1{font-size:26px} h2{font-size:22px} h3{font-size:19px}
p{margin:0 0 14px}
.muted{color:var(--muted)}
.small{font-size:15px;line-height:1.7}
.center{text-align:center}

/* ---------- cards & buttons ---------- */
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:18px 18px 16px;margin:0 0 var(--gap)}
.card.flat{background:transparent;border-style:dashed}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:50px;padding:10px 22px;border-radius:10px;border:1.5px solid var(--navy);
  background:var(--navy);color:var(--cream);font-size:17px;line-height:1.5;cursor:pointer;text-decoration:none;
}
.btn.amber{background:var(--amber);border-color:var(--amber);color:#fff}
.btn.ghost{background:transparent;color:var(--navy)}
.btn.block{display:flex;width:100%}
.btn[disabled]{opacity:.5;cursor:default}
.btn svg{width:20px;height:20px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row.end{justify-content:flex-end}
.row.between{justify-content:space-between}
.linkbtn{background:none;border:0;color:var(--navy);text-decoration:underline;text-underline-offset:3px;cursor:pointer;padding:8px 0;font-size:16px}

/* ---------- forms ---------- */
.field{margin:0 0 16px}
.field label{display:block;font-size:16px;color:var(--navy);margin:0 0 4px}
.field .hint{font-size:14px;color:var(--muted);line-height:1.6;margin-top:4px}
.field input[type=text],.field input[type=tel],.field input[type=email],.field input[type=password],
.field input[type=number],.field input[type=datetime-local],.field select,.field textarea{
  width:100%;min-height:50px;padding:10px 14px;border:1.5px solid var(--line);border-radius:10px;background:#fff;font-size:18px;
}
.field textarea{min-height:96px;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--navy);outline:none;box-shadow:0 0 0 3px rgba(224,123,58,.25)}
.field.err input,.field.err select,.field.err textarea{border-color:var(--bad)}
.field .emsg{color:var(--bad);font-size:15px;line-height:1.6;margin-top:4px}
.pin{letter-spacing:.6em;font-family:var(--mono);font-size:24px !important;text-align:center;max-width:220px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:16px;line-height:1.7;cursor:pointer;margin:0 0 12px}
.check input{width:22px;height:22px;margin-top:4px;flex:none;accent-color:var(--navy)}

.alert{border-radius:10px;padding:12px 14px;margin:0 0 16px;font-size:16px;line-height:1.7}
.alert.bad{background:var(--bad-soft);color:#7A1C16}
.alert.ok{background:var(--ok-soft);color:#1D5134}
.alert.info{background:#EEF1F7;color:var(--navy)}

/* ---------- loading ---------- */
.loading{padding:60px 0;text-align:center;color:var(--muted)}
.spin{width:34px;height:34px;border:3px solid var(--line);border-top-color:var(--amber);border-radius:50%;
  margin:0 auto 14px;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spin{animation-duration:3s}}

/* ---------- login page hero ---------- */
.hero{background:var(--navy);color:var(--cream);padding:34px 16px 30px;border-bottom:4px solid var(--amber)}
.hero .in{max-width:760px;margin:0 auto}
.hero img{height:30px;margin-bottom:18px}
.hero h1{color:var(--cream);font-size:28px;margin:6px 0 8px}
.hero p{color:#DCD6CC;font-size:16px;margin:0}
.facts{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.facts span{border:1px solid rgba(248,244,238,.35);border-radius:99px;padding:4px 12px;font-size:14px}

/* ---------- dashboard ---------- */
.hello{display:flex;justify-content:space-between;align-items:flex-end;gap:10px;margin-bottom:14px}
.meter{height:10px;background:var(--line);border-radius:6px;overflow:hidden;margin:10px 0 6px}
.meter i{display:block;height:100%;background:var(--amber);border-radius:6px;transition:width .5s}
.nextcard{background:var(--navy);color:var(--cream);border:0}
.nextcard h2{color:var(--cream)}
.nextcard .muted{color:#CFC8BC}
.steps{list-style:none;margin:0;padding:0}
.steps .unit{font-size:15px;color:var(--muted);margin:22px 0 8px;display:flex;align-items:center;gap:8px}
.steps .unit:after{content:"";flex:1;height:1px;background:var(--line)}
.step{
  display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;margin-bottom:8px;min-height:64px;color:inherit;text-decoration:none;
}
button.step{width:100%;text-align:left;cursor:pointer;font:inherit}
.step .ic{width:36px;height:36px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;
  background:var(--cream);color:var(--muted);font-size:15px}
.step .ic svg{width:18px;height:18px}
.step .tx{flex:1;min-width:0;line-height:1.55}
.step .tx .t{color:var(--navy);display:block}
.step .tx .s{font-size:14px;color:var(--muted)}
.step .go{color:var(--navy);font-size:14px;white-space:nowrap}
.step.locked{opacity:.55}
.step.passed .ic{background:var(--ok-soft);color:var(--ok)}
.step.now{border-color:var(--amber);box-shadow:0 0 0 2px var(--amber-soft)}
.step.now .ic{background:var(--amber);color:#fff}
.step.read .ic{background:var(--amber-soft);color:var(--amber)}

/* ---------- lesson ---------- */
.lhead{margin-bottom:10px}
.lhead .unit{font-size:14px;color:var(--amber)}
.dots{display:flex;gap:6px;margin:10px 0 18px}
.dots i{flex:1;height:5px;border-radius:3px;background:var(--line)}
.dots i.seen{background:var(--grey)}
.dots i.cur{background:var(--amber)}
.screen h2{font-size:23px;margin-bottom:14px}
.screen p{font-size:18px}
.screen ul,.screen ol{padding-left:24px;margin:0 0 16px}
.screen li{margin:0 0 8px}
.term{border-left:4px solid var(--navy);background:#fff;border-radius:0 10px 10px 0;padding:10px 14px;margin:0 0 16px}
.term .k{font-size:13px;color:var(--muted);display:block}
.term .w{color:var(--navy);font-size:19px;display:block;line-height:1.5}
.term .d{font-size:16px;line-height:1.7}
.note{border-left:4px solid var(--amber);background:var(--amber-soft);border-radius:0 10px 10px 0;padding:10px 14px;margin:0 0 16px;font-size:17px}
.source{font-size:14px;color:var(--muted);line-height:1.6;margin:-6px 0 16px}
.outcomes{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:0 0 18px}
.outcomes ul{margin:4px 0 0;padding-left:22px}
.lnav{position:sticky;bottom:0;background:linear-gradient(rgba(248,244,238,0),var(--cream) 30%);padding:18px 0 12px;margin-top:10px}
.lnav .row{justify-content:space-between}
.lnav .btn{flex:1;max-width:48%}

/* check-in */
.ci{background:#fff;border:1.5px solid var(--navy);border-radius:12px;padding:16px;margin:0 0 18px}
.ci .lab{font-size:13px;color:var(--amber);display:block;margin-bottom:4px}
.opt{
  display:flex;gap:10px;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);
  border-radius:10px;padding:10px 14px;margin:0 0 8px;cursor:pointer;min-height:50px;line-height:1.6;font-size:17px;
}
.opt .l{color:var(--amber);flex:none;min-width:22px}
.opt:hover{border-color:var(--grey)}
.opt.sel{border-color:var(--navy);background:#EEF1F7}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt[disabled]{cursor:default}
.fb{border-radius:10px;padding:10px 14px;font-size:16px;line-height:1.7;margin-top:6px}
.fb.ok{background:var(--ok-soft);color:#1D5134}
.fb.bad{background:var(--bad-soft);color:#7A1C16}

/* summary cards (the built-in "slides") */
.slides{position:relative}
.slide{
  background:var(--navy);color:var(--cream);border-radius:14px;padding:26px 22px;min-height:230px;
  display:flex;flex-direction:column;justify-content:center;border-bottom:5px solid var(--amber);
}
.slide .n{font-size:14px;color:var(--amber);margin-bottom:10px}
.slide .h{font-size:24px;line-height:1.5;margin-bottom:8px;color:#fff}
.slide .b{font-size:18px;line-height:1.75;color:#E6E0D6}
.slidenav{display:flex;align-items:center;justify-content:space-between;margin-top:10px}
.slidenav button{background:#fff;border:1px solid var(--line);border-radius:50%;width:48px;height:48px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.slidenav button svg{width:20px;height:20px}
.gslides{position:relative;padding-top:59%;border-radius:12px;overflow:hidden;background:#000;margin-top:14px}
.gslides iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* ---------- activities ---------- */
.act{background:#fff;border:1px solid var(--line);border-top:4px solid var(--amber);border-radius:12px;padding:16px;margin:0 0 18px}
.act .lab{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--amber);text-transform:uppercase}
.act .lab .bn{font-family:var(--bn);letter-spacing:0;text-transform:none;font-size:14px}
.act .instr{font-size:16px;margin:4px 0 12px}
.act .tips{font-size:14px;color:var(--muted);margin:10px 0 0;padding-left:20px}
.gcard{background:var(--cream);border-radius:10px;padding:16px;margin:10px 0;font-size:17px;min-height:96px}
.gcard .c{font-size:14px;color:var(--muted)}
.gopts{display:flex;gap:8px;flex-wrap:wrap}
.gopts .btn{flex:1 1 40%;min-height:48px;font-size:16px;padding:8px 12px}
.tick{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}
.tick:last-child{border-bottom:0}
.tick input{width:24px;height:24px;flex:none;margin-top:3px;accent-color:var(--ok)}
.tick .p{display:block;font-size:14px;color:var(--muted);font-family:var(--bn);line-height:1.6}
.tick.done .t{text-decoration:line-through;text-decoration-color:var(--grey)}
.op{border:1px solid var(--line);border-radius:10px;padding:12px;margin:0 0 10px}
.op code{font-family:var(--mono),var(--bn);font-size:15px;background:var(--cream);padding:2px 6px;border-radius:5px;word-break:break-word}
.op .row{margin-top:8px}
.op .btn{min-height:40px;padding:4px 14px;font-size:15px}
.words{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.words span{background:var(--navy);color:var(--cream);border-radius:8px;padding:6px 12px;font-family:var(--mono);font-size:18px}
.words span small{display:block;font-family:var(--bn);font-size:13px;opacity:.8}
.logitem{border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin:0 0 8px;font-size:15px;line-height:1.7;word-break:break-word}
.post{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.post .ph{display:flex;gap:10px;align-items:center;padding:10px 12px}
.post .av{width:36px;height:36px;border-radius:50%;background:var(--amber)}
.post .pb{padding:0 14px 12px;font-size:16px;white-space:pre-wrap}
.post .src{padding:0 14px 12px;font-size:13px;color:var(--muted)}
.ok-list{list-style:none;padding:0;margin:10px 0 0;font-size:15px}
.ok-list li{padding:2px 0}
.ok-list .y{color:var(--ok)} .ok-list .n{color:var(--muted)}

/* ---------- quiz & test ---------- */
.q{margin:0 0 22px}
.q .qt{font-size:18px;color:var(--navy);margin-bottom:10px;display:flex;gap:8px}
.q .qt .no{color:var(--amber);flex:none}
.q.ok .qt:after{content:"✓";color:var(--ok);margin-left:auto}
.q.no .qt:after{content:"✗";color:var(--bad);margin-left:auto}
.score{font-size:52px;color:var(--navy);line-height:1.3}
.score small{font-size:22px;color:var(--muted)}
.bar{height:8px;background:var(--line);border-radius:5px;overflow:hidden;margin:8px 0 16px}
.bar i{display:block;height:100%;background:var(--navy)}
.scale{display:flex;gap:6px}
.scale button{flex:1;min-height:48px;border:1.5px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;font-size:18px}
.scale button.sel{background:var(--navy);border-color:var(--navy);color:#fff}
.scalelab{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-top:4px}
.yn{display:flex;gap:6px}
.yn button{flex:1;min-height:46px;border:1.5px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;font-size:16px}
.yn button.sel{background:var(--navy);border-color:var(--navy);color:#fff}
.stmt{padding:12px 0;border-bottom:1px solid var(--line)}
.stmt p{margin:0 0 8px;font-size:17px}
.areas .ar{margin:0 0 10px}
.areas .an{font-size:15px;color:var(--navy)}
.areas .ab{height:7px;background:var(--line);border-radius:4px;margin:3px 0;overflow:hidden}
.areas .ab span{display:block;height:100%}
.areas .pre{background:var(--grey)} .areas .post{background:var(--amber)}

/* ---------- certificate & verify ---------- */
.verified{display:flex;gap:12px;align-items:center;background:var(--ok-soft);border-radius:12px;padding:14px 16px;margin:0 0 16px}
.verified svg{width:34px;height:34px;color:var(--ok);flex:none}
.sharebox{display:flex;gap:8px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 8px 8px 12px;font-family:var(--mono);font-size:14px;word-break:break-all}
.sharebox span{flex:1}
.wide{max-width:1180px}

/* ---------- toast ---------- */
.toast{visibility:hidden;position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(120px);background:var(--navy);color:var(--cream);
  padding:10px 18px;border-radius:10px;font-size:15px;z-index:50;transition:transform .25s;max-width:90vw;text-align:center}
.toast.show{visibility:visible;transform:translateX(-50%) translateY(0)}

.foot{text-align:center;font-size:14px;color:var(--muted);padding:24px 16px 40px}
.foot .mono{font-family:var(--mono);letter-spacing:.15em;font-size:12px}

@media (min-width:700px){
  h1{font-size:30px}
  .wrap{padding-top:28px}
}
@media print{
  .top,.lnav,.foot,.toast{display:none !important}
}