/* Kids Learn With Concept - admin panel and teacher area.
   Deliberately its own stylesheet: the public site's style.css is tuned for a
   colourful children's page, and a work surface people use for an hour at a
   time needs calmer type and denser tables. */

:root{
  --kl-ink:#1B2430; --kl-muted:#5B6673; --kl-line:#DFE5EC; --kl-bg:#F4F7FA;
  --kl-primary:#2F8FD0; --kl-primary-dark:#1F6FA8; --kl-accent:#F7A823;
  --kl-ok:#2E8B4F; --kl-okbg:#E9F6EE; --kl-err:#C2412D; --kl-errbg:#FBEDEA;
  --kl-warnbg:#FFF6E3; --kl-warnline:#E8B964;
  --kl-radius:12px; --kl-shadow:0 2px 10px rgba(27,36,48,.06);
}
*{box-sizing:border-box}
body{margin:0;font:15px/1.55 "Segoe UI",system-ui,-apple-system,sans-serif;color:var(--kl-ink);background:var(--kl-bg)}
a{color:var(--kl-primary-dark);text-decoration:none}
a:hover{text-decoration:underline}
h1{font-size:25px;margin:0 0 6px}
h2{font-size:19px;margin:26px 0 10px}
h3{font-size:16px;margin:0 0 6px}
code{background:#EEF2F7;padding:1px 5px;border-radius:4px;font-size:12.5px}
.kl-muted{color:var(--kl-muted)}
.kl-small{font-size:13px}
.kl-fine{font-size:12px;color:var(--kl-muted);line-height:1.45}

/* ---------------------------------------------------------------- shell */
.kl-shell{display:flex;min-height:100vh}
.kl-side{width:232px;flex:none;background:#16222F;color:#C7D3E0;padding:18px 0 30px;position:sticky;top:0;height:100vh;overflow:auto}
.kl-brand{display:block;padding:0 20px 18px;color:#fff;font-weight:800;font-size:17px;line-height:1.2}
.kl-brand span{display:block;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--kl-accent);font-weight:700;margin-top:3px}
.kl-lbl{padding:16px 20px 7px;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:#6F8296}
.kl-nv{display:flex;align-items:center;gap:9px;padding:9px 20px;color:#C7D3E0;font-size:14px}
.kl-nv:hover{background:#1E2D3E;color:#fff;text-decoration:none}
.kl-nv.on{background:var(--kl-primary);color:#fff;font-weight:600}
.kl-nv .kl-cnt{margin-left:auto;background:var(--kl-accent);color:#36270A;font-size:11px;font-weight:700;padding:1px 7px;border-radius:20px}
.kl-main{flex:1;min-width:0;display:flex;flex-direction:column}
.kl-top{display:flex;align-items:center;gap:14px;padding:15px 26px;background:#fff;border-bottom:1px solid var(--kl-line)}
.kl-top h1{font-size:20px;margin:0}
.kl-top .kl-sp{flex:1}
.kl-inner{padding:22px 26px 60px}
.kl-wrap{max-width:860px;margin:0 auto;padding:30px 20px 70px}
.kl-plainbody{background:var(--kl-bg)}

/* ------------------------------------------------------------- controls */
.kl-btn{display:inline-block;padding:9px 16px;border:1px solid transparent;border-radius:9px;
  font:600 14px/1.2 inherit;cursor:pointer;background:#fff;color:var(--kl-ink);border-color:var(--kl-line)}
.kl-btn:hover{text-decoration:none;border-color:#BFCAD8}
.kl-btn-primary{background:var(--kl-primary);border-color:var(--kl-primary);color:#fff}
.kl-btn-primary:hover{background:var(--kl-primary-dark);border-color:var(--kl-primary-dark)}
.kl-btn-danger{background:#fff;border-color:#E6B6AC;color:var(--kl-err)}
.kl-btn-danger:hover{background:var(--kl-errbg)}
.kl-btn-ok{background:var(--kl-ok);border-color:var(--kl-ok);color:#fff}
.kl-btn-ghost{background:#fff}
.kl-btn-sm{padding:6px 11px;font-size:13px}
.kl-btn-xs{padding:4px 9px;font-size:12px;border-radius:7px}
.kl-btn-block{display:block;width:100%;text-align:center}
.kl-in,.kl-sel,textarea.kl-in{width:100%;padding:9px 11px;border:1px solid var(--kl-line);
  border-radius:9px;font:15px/1.4 inherit;background:#fff;color:var(--kl-ink)}
.kl-in:focus,.kl-sel:focus{outline:2px solid #BFE0F5;outline-offset:0;border-color:var(--kl-primary)}
textarea.kl-in{resize:vertical}
label{display:block;font-size:13px;font-weight:600;margin:12px 0 5px}
.kl-field{margin-bottom:12px}
.kl-row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.kl-row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.kl-hint{font-size:12px;color:var(--kl-muted);margin-top:4px}
.kl-req{color:var(--kl-err)}

/* ---------------------------------------------------------------- cards */
.kl-card{background:#fff;border:1px solid var(--kl-line);border-radius:var(--kl-radius);
  padding:18px;box-shadow:var(--kl-shadow);margin-bottom:16px}
.kl-card.wide{max-width:none}
.kl-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:13px;margin-bottom:20px}
.kl-stat{background:#fff;border:1px solid var(--kl-line);border-radius:var(--kl-radius);padding:15px 17px;box-shadow:var(--kl-shadow)}
.kl-stat b{display:block;font-size:26px;line-height:1.1;color:var(--kl-ink)}
.kl-stat span{font-size:12.5px;color:var(--kl-muted)}

/* --------------------------------------------------------------- tables */
.kl-tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--kl-line);
  border-radius:var(--kl-radius);overflow:hidden;font-size:14px}
.kl-tbl th{background:#EEF3F8;text-align:left;padding:10px 12px;font-size:12px;
  text-transform:uppercase;letter-spacing:.05em;color:var(--kl-muted);font-weight:700}
.kl-tbl td{padding:11px 12px;border-top:1px solid var(--kl-line);vertical-align:top}
.kl-tbl tr.pend td{background:#FFFBF2}
.kl-acts{display:flex;gap:6px;flex-wrap:wrap;align-items:center}

/* --------------------------------------------------------------- badges */
.kl-badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11.5px;font-weight:700;
  background:#EEF2F7;color:var(--kl-muted)}
.kl-badge.ok{background:var(--kl-okbg);color:var(--kl-ok)}
.kl-badge.pend{background:var(--kl-warnbg);color:#8A5B00}
.kl-badge.err{background:var(--kl-errbg);color:var(--kl-err)}

/* --------------------------------------------------------------- alerts */
.kl-alert{padding:11px 14px;border-radius:10px;margin-bottom:14px;font-size:14px;border:1px solid transparent}
.kl-alert ul{margin:6px 0 0 18px;padding:0}
.kl-ok{background:var(--kl-okbg);border-color:#BFE3CD;color:#1F5F39}
.kl-err{background:var(--kl-errbg);border-color:#EEC3B9;color:#8E2F1F}
.kl-warn{background:var(--kl-warnbg);border-color:var(--kl-warnline);color:#7A5410}
.kl-info{background:#EAF4FB;border-color:#B9D9EE;color:#1C5578}

/* ------------------------------------------------------------ sign-in */
.kl-authbody{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px;
  background:linear-gradient(160deg,#1E3A52,#2F8FD0)}
.kl-authcard{background:#fff;border-radius:16px;padding:30px 28px;width:100%;max-width:380px;
  box-shadow:0 18px 50px rgba(0,0,0,.22)}
.kl-authlogo{display:block;font-weight:800;font-size:18px;color:var(--kl-ink);margin-bottom:18px}
.kl-authlogo span{color:var(--kl-primary)}
.kl-authcard h1{font-size:22px}

/* --------------------------------------------------------------- empty */
.kl-empty{text-align:center;padding:46px 20px;background:#fff;border:1px dashed var(--kl-line);border-radius:var(--kl-radius)}
.kl-empty .big{font-size:40px;margin-bottom:8px}

.kl-tabs{display:flex;gap:7px;margin-bottom:16px;flex-wrap:wrap}
.kl-tabs a{padding:7px 14px;border-radius:20px;background:#fff;border:1px solid var(--kl-line);font-size:13.5px;font-weight:600}
.kl-tabs a.on{background:var(--kl-ink);border-color:var(--kl-ink);color:#fff}
.kl-tabs a:hover{text-decoration:none}

.kl-thumb{width:46px;height:60px;object-fit:cover;border-radius:6px;border:1px solid var(--kl-line);background:#fff}
.kl-avatar{width:44px;height:44px;border-radius:50%;object-fit:cover;border:2px solid #fff;box-shadow:0 0 0 1px var(--kl-line)}

@media (max-width:900px){
  .kl-shell{flex-direction:column}
  .kl-side{width:100%;height:auto;position:static}
  .kl-row2,.kl-row3{grid-template-columns:1fr}
  .kl-inner{padding:18px 15px 50px}
}

/* ============================================ teacher registration page ==
   A public page, so it does not use the panel shell. It has to do a selling
   job as well as collect fields - a teacher deciding whether to bother is
   the whole conversion problem here. */

.kl-reg{min-height:100vh;background:linear-gradient(165deg,#132C40 0%,#1E5A85 55%,#2F8FD0 100%);
  padding:0 0 60px;color:#fff}
.kl-reg-top{max-width:1080px;margin:0 auto;padding:22px 20px 0;display:flex;align-items:center;gap:14px}
.kl-reg-top a.logo{color:#fff;font-weight:800;font-size:18px}
.kl-reg-top a.logo span{color:var(--kl-accent)}
.kl-reg-top .sp{flex:1}
.kl-reg-top a.signin{color:#CDE4F5;font-size:14px}
.kl-reg-hero{max-width:1080px;margin:0 auto;padding:34px 20px 26px;text-align:center}
.kl-reg-hero .eyebrow{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  padding:5px 14px;border-radius:30px;font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase}
.kl-reg-hero h1{font-size:38px;line-height:1.15;margin:16px 0 10px;color:#fff;font-weight:800}
.kl-reg-hero h1 em{font-style:normal;color:var(--kl-accent)}
.kl-reg-hero p{max-width:620px;margin:0 auto;font-size:16.5px;line-height:1.6;color:#D7E8F5}

.kl-reg-perks{max-width:1080px;margin:0 auto;padding:6px 20px 30px;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:14px}
.kl-perk{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.17);border-radius:14px;padding:17px 18px}
.kl-perk .i{font-size:26px;display:block;margin-bottom:7px}
.kl-perk b{display:block;font-size:15px;margin-bottom:4px;color:#fff}
.kl-perk span{font-size:13.5px;line-height:1.5;color:#CBE0EF}

.kl-reg-grid{max-width:1080px;margin:0 auto;padding:0 20px;display:grid;
  grid-template-columns:minmax(0,1fr) 330px;gap:22px;align-items:start}
.kl-reg-form{background:#fff;border-radius:18px;padding:26px 26px 24px;color:var(--kl-ink);
  box-shadow:0 20px 50px rgba(0,0,0,.25)}
.kl-reg-form h2{margin:0 0 4px;font-size:22px}
.kl-steps{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.17);border-radius:16px;padding:20px}
.kl-steps h3{color:#fff;font-size:16px;margin-bottom:12px}
.kl-step{display:flex;gap:12px;margin-bottom:15px}
.kl-step .n{flex:none;width:27px;height:27px;border-radius:50%;background:var(--kl-accent);color:#36270A;
  font-weight:800;font-size:13px;display:grid;place-items:center}
.kl-step b{display:block;color:#fff;font-size:14px;margin-bottom:2px}
.kl-step span{font-size:13px;line-height:1.5;color:#C8DEEE}

@media (max-width:900px){
  .kl-reg-grid{grid-template-columns:1fr}
  .kl-reg-hero h1{font-size:28px}
}

/* ======================================================= review screens ==
   Reading a PDF in the panel: the file on the left, the decision on the right. */
.kl-revwrap{display:grid;grid-template-columns:minmax(0,1fr) 325px;gap:18px;align-items:start}
.kl-revdoc{border:1px solid var(--kl-line);border-radius:var(--kl-radius);background:#fff;overflow:hidden}
.kl-revbar{display:flex;align-items:center;gap:10px;padding:9px 12px;border-bottom:1px solid var(--kl-line);background:var(--kl-bg);flex-wrap:wrap}
.kl-revbar .sp{flex:1}
.kl-revframe{display:block;width:100%;height:78vh;min-height:500px;border:0;background:#525659}
.kl-revside{display:flex;flex-direction:column;gap:14px;position:sticky;top:14px}
.kl-revside .kl-card{margin:0}
.kl-revlist{margin:0 0 4px 16px;padding:0}
.kl-revlist li{font-size:13px;line-height:1.5;color:var(--kl-muted);margin-bottom:6px}
.kl-revcheck{display:flex;gap:9px;align-items:flex-start;font-size:13px;line-height:1.45;margin:4px 0 10px;cursor:pointer;font-weight:400}
.kl-revcheck input{margin-top:3px;flex:none}

/* Tick-list used by the worksheet importer. */
.kl-picklist{max-height:340px;overflow:auto;border:1px solid var(--kl-line);border-radius:10px;padding:6px;background:#fff}
.kl-pick{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border-radius:8px;cursor:pointer;font-weight:400}
.kl-pick:hover{background:var(--kl-bg)}
.kl-pick input{margin-top:3px;flex:none}

/* A table that would otherwise force the whole page sideways on a phone. */
.kl-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.kl-scroll .kl-tbl{min-width:640px}

/* ============================================================== mobile ==
   Android and iOS. Three things matter most and none of them are layout:
   an input smaller than 16px makes iOS Safari zoom the page on focus and it
   never zooms back; a tap target under 44px is missed as often as hit; and a
   phone with a notch hides content behind the home indicator unless the safe
   area is respected. */

html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{overflow-wrap:break-word}

@media (max-width:900px){
  .kl-revwrap{grid-template-columns:1fr}
  .kl-revside{position:static}
  .kl-revframe{height:62vh;min-height:360px}

  /* The sidebar becomes a horizontal strip instead of eating the screen. */
  .kl-side{height:auto;padding:12px 0 10px;position:static;
    padding-bottom:calc(10px + env(safe-area-inset-bottom))}
  .kl-brand{padding:0 16px 12px}
  .kl-lbl{padding:10px 16px 5px}
  .kl-side{display:flex;flex-wrap:wrap;align-items:center;gap:4px}
  .kl-brand{width:100%}
  .kl-lbl{width:100%}
  .kl-nv{padding:10px 14px;border-radius:9px;margin:0 4px;min-height:44px}
  .kl-top{padding:12px 16px;position:sticky;top:0;z-index:20}
  .kl-top h1{font-size:17px}
  .kl-inner{padding:16px 14px calc(50px + env(safe-area-inset-bottom))}
}

@media (max-width:640px){
  h1{font-size:21px}
  h2{font-size:17px;margin:20px 0 9px}

  /* 16px exactly: anything smaller and iOS Safari zooms in on focus. */
  .kl-in,.kl-sel,textarea.kl-in{font-size:16px;padding:11px 12px}
  .kl-btn{min-height:44px;padding:11px 16px}
  .kl-btn-sm,.kl-btn-xs{min-height:38px;padding:8px 13px;font-size:13px}
  .kl-acts{gap:8px}
  .kl-acts .kl-btn{flex:1 1 auto}

  /* Tables become stacked cards - a six-column grid is unreadable on a phone
     however much it scrolls. */
  .kl-tbl,.kl-tbl tbody,.kl-tbl tr,.kl-tbl td{display:block;width:100%}
  .kl-tbl{border:0;background:transparent}
  .kl-tbl thead,.kl-tbl th{display:none}
  .kl-tbl tr{background:#fff;border:1px solid var(--kl-line);border-radius:var(--kl-radius);
    margin-bottom:11px;padding:12px;box-shadow:var(--kl-shadow)}
  .kl-tbl td{border:0;padding:5px 0}
  .kl-tbl td:empty{display:none}
  .kl-scroll{overflow:visible}
  .kl-scroll .kl-tbl{min-width:0}

  .kl-stats{grid-template-columns:1fr 1fr;gap:10px}
  .kl-stat b{font-size:21px}
  .kl-card{padding:15px}
  .kl-authcard{padding:24px 20px}
  .kl-wrap{padding:20px 15px calc(50px + env(safe-area-inset-bottom))}
  .kl-tabs a{flex:1 1 auto;text-align:center}
  .kl-thumb{width:40px;height:52px}

  /* The registration page. */
  .kl-reg-hero{padding:24px 16px 20px}
  .kl-reg-hero h1{font-size:25px}
  .kl-reg-hero p{font-size:15px}
  .kl-reg-perks{grid-template-columns:1fr;gap:10px;padding-bottom:22px}
  .kl-reg-grid{padding:0 15px}
  .kl-reg-form{padding:20px 18px;border-radius:14px}
  .kl-reg{padding-bottom:calc(40px + env(safe-area-inset-bottom))}
}

/* A phone held sideways has very little height; do not let the PDF frame
   take all of it. */
@media (max-height:520px) and (orientation:landscape){
  .kl-revframe{height:300px;min-height:0}
}

/* Respect a reduced-motion preference, and print without the chrome. */
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media print{.kl-side,.kl-top,.kl-acts,.kl-tabs{display:none!important}
  .kl-inner{padding:0}.kl-card{box-shadow:none;border-color:#ccc}}

/* ======================================================== public pages ==
   teachers.php - the only page of this stylesheet a parent sees. */
.kl-pubtop{display:flex;align-items:center;gap:12px;padding:14px 20px;background:#fff;
  border-bottom:1px solid var(--kl-line);flex-wrap:wrap}
.kl-pubtop .logo{font-weight:800;font-size:17px;color:var(--kl-ink)}
.kl-pubtop .logo span{color:var(--kl-primary)}
.kl-pubtop .sp{flex:1}
.kl-pubhero{background:linear-gradient(160deg,#163A55,#2F8FD0);color:#fff;padding:40px 20px 36px;text-align:center}
.kl-pubhero h1{font-size:33px;margin:0 0 10px;color:#fff;font-weight:800}
.kl-pubhero h1 em{font-style:normal;color:var(--kl-accent)}
.kl-pubhero p{max-width:580px;margin:0 auto;color:#D7E8F5;font-size:16px;line-height:1.6}

.kl-vidgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:16px}
.kl-vidcard{background:#fff;border:1px solid var(--kl-line);border-radius:14px;overflow:hidden;box-shadow:var(--kl-shadow)}
.kl-vidcard .im{display:block;position:relative;aspect-ratio:16/9;background:#12202C}
.kl-vidcard .im img{width:100%;height:100%;object-fit:cover;display:block}
.kl-vidcard .im .ph{position:absolute;inset:0;display:grid;place-items:center;color:#5C7A91}
.kl-vidcard .im .play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:48px;height:48px;border-radius:50%;background:rgba(0,0,0,.6);color:#fff;
  display:grid;place-items:center;font-size:17px}
.kl-vidcard .bd{padding:13px 14px 14px}
.kl-vidcard h3{font-size:15.5px;margin:7px 0 5px;line-height:1.35}
.kl-vidcard p{font-size:13px;color:var(--kl-muted);margin:0 0 9px;line-height:1.5}
.kl-vidcard .by{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--kl-muted);
  border-top:1px solid var(--kl-line);padding-top:9px}
.kl-vidcard .by img{width:30px;height:30px;border-radius:50%;object-fit:cover}

.kl-tgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(198px,1fr));gap:15px}
.kl-tcard{background:#fff;border:1px solid var(--kl-line);border-radius:14px;padding:18px 15px;
  text-align:center;box-shadow:var(--kl-shadow)}
.kl-tcard img,.kl-tcard .ph{width:72px;height:72px;border-radius:50%;object-fit:cover;margin:0 auto 10px;display:block}
.kl-tcard .ph{background:var(--kl-bg);display:grid;place-items:center;font-size:30px}
.kl-tcard h3{font-size:15.5px;margin:0 0 3px}
.kl-tcard .q{font-size:12.5px;color:var(--kl-primary-dark);margin:0 0 3px;font-weight:600}
.kl-tcard .s{font-size:12.5px;color:var(--kl-muted);margin:0 0 7px}
.kl-tcard .b{font-size:12.5px;color:var(--kl-muted);margin:0 0 8px;line-height:1.5}
.kl-tcard .n{font-size:12px;color:var(--kl-muted);margin:0}

.kl-cta{background:#fff;border:1px solid var(--kl-line);border-radius:16px;padding:26px 22px;
  text-align:center;margin:34px 0 10px;box-shadow:var(--kl-shadow)}
.kl-cta p{max-width:520px;margin:0 auto 16px;color:var(--kl-muted)}
.kl-cta .kl-btn{margin:0 4px}

@media (max-width:640px){
  .kl-pubhero{padding:30px 16px 28px}
  .kl-pubhero h1{font-size:24px}
  .kl-vidgrid{grid-template-columns:1fr}
  .kl-tgrid{grid-template-columns:1fr 1fr}
  .kl-cta{padding:20px 16px}
  .kl-cta .kl-btn{display:block;width:100%;margin:8px 0}
}

/* The real site logo on the public pages, rather than a text wordmark - a
   parent arriving from the home page should see the same mark they clicked. */
.kl-pubtop .logo,.kl-reg-top a.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.kl-pubtop .logo img,.kl-reg-top a.logo img{width:62px;height:auto;display:block;
  background:#fff;border-radius:9px;padding:3px}
.kl-pubtop .logo .wm{font-weight:800;font-size:16.5px;color:var(--kl-ink);line-height:1.15}
.kl-pubtop .logo .wm b{color:var(--kl-primary);font-weight:800}
.kl-reg-top a.logo .wm{font-weight:800;font-size:16.5px;color:#fff;line-height:1.15}
.kl-reg-top a.logo .wm b{color:var(--kl-accent);font-weight:800}
@media (max-width:480px){
  .kl-pubtop .logo img,.kl-reg-top a.logo img{width:46px}
  .kl-pubtop .logo .wm,.kl-reg-top a.logo .wm{font-size:14px}
}

/* The importer shows a thumbnail per row, so a 38-item list is scannable. */
.kl-pick .kl-thumb{flex:none;margin-right:2px}
.kl-pick{align-items:center}

/* The bulk bar above a folder's worksheet list. */
.kl-bulkbar{display:flex;align-items:center;gap:9px;flex-wrap:wrap;background:#fff;
  border:1px solid var(--kl-line);border-radius:var(--kl-radius);padding:10px 13px;margin-bottom:12px}
.kl-bulkbar .sp{flex:1}
.kl-bulkbar label{display:flex;align-items:center;gap:7px;margin:0;font-weight:600;font-size:13.5px}
@media (max-width:640px){
  .kl-bulkbar{position:sticky;top:0;z-index:10}
  .kl-bulkbar .sp{display:none}
  .kl-bulkbar .kl-btn{flex:1 1 auto}
}