/* ============================================================
   Signed-in app theme — "Lerne mit dem Hamster"
   Same family as the public pages (navy ink, school green, sky blue,
   Fraunces headlines, Inter Tight text, mono labels) plus a few
   classroom touches: textbook covers for subjects, exercise books for
   grades, a table of contents for lessons, squared notebook paper with a
   red margin under the tasks, and a teacher's handwriting for feedback.
   Loaded after styles.css (overrides it) and before pub.css.
   ============================================================ */

:root{
  --bg:#F2F7FC;
  --surface:#FFFFFF;
  --surface-2:#E8F1F9;
  --ink:#16304D;
  --muted:#5B6F87;
  --line:#D5E2EE;
  --accent:#2E6BD1;          /* blue pen: selection, focus, links */
  --accent-ink:#FFFFFF;
  --accent-soft:#E1ECFC;
  --brand:#158463;           /* school green: primary buttons, brand */
  --brand-dark:#0F6A4F;
  --brand-soft:#DDF2EA;
  --teal:#1C8A5C;            /* right answers */
  --teal-soft:#DCF3E6;
  --danger:#D2463C;          /* red pen: wrong answers, margin line */
  --star:#F2B23A;
  --sky:#DCEBFA;
  --paper-line:rgba(46,107,209,.10);
  --shadow:0 1px 2px rgba(22,48,77,.06), 0 14px 34px -20px rgba(22,48,77,.35);
  --radius:16px;
  --side:248px;
}
:root:not([data-theme="light"]){ color-scheme:light; }
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0E1828; --surface:#152238; --surface-2:#1B2B45; --ink:#E4EDF8; --muted:#93A7C0; --line:#2A3C59;
    --accent:#86AEF2; --accent-ink:#0E1828; --accent-soft:#22355A;
    --brand:#35B98B; --brand-dark:#2A9B74; --brand-soft:#173D33;
    --teal:#5CC796; --teal-soft:#183A2C; --danger:#F08A80; --star:#F5C35E; --sky:#1A2C4A;
    --paper-line:rgba(134,174,242,.09);
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 16px 40px -20px rgba(0,0,0,.8);
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0E1828; --surface:#152238; --surface-2:#1B2B45; --ink:#E4EDF8; --muted:#93A7C0; --line:#2A3C59;
  --accent:#86AEF2; --accent-ink:#0E1828; --accent-soft:#22355A;
  --brand:#35B98B; --brand-dark:#2A9B74; --brand-soft:#173D33;
  --teal:#5CC796; --teal-soft:#183A2C; --danger:#F08A80; --star:#F5C35E; --sky:#1A2C4A;
  --paper-line:rgba(134,174,242,.09);
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 16px 40px -20px rgba(0,0,0,.8);
}

body:not(.pub) [hidden]{display:none!important}

/* ---------- type ---------- */
body{font-family:"Inter Tight","Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif}
body:not(.pub) h1,body:not(.pub) h2,body:not(.pub) .folder-name,body:not(.pub) .pname,body:not(.pub) .lec-h,body:not(.pub) .rules-h{
  font-family:"Fraunces",Georgia,serif;font-optical-sizing:auto;font-weight:700;letter-spacing:-.015em}
body:not(.pub) h3{font-family:"Inter Tight",sans-serif;font-weight:700;letter-spacing:-.01em}
.eyebrow,.mono-label{
  font-family:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;font-weight:500;font-size:11.5px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--brand)}
.mono-label{display:inline-block}
body:not(.pub) ::selection{background:var(--sky)}
.wrap{max-width:1080px}

/* ---------- buttons ---------- */
.btn{border-radius:12px;font-weight:700;padding:11px 20px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 3px 0 var(--brand-dark)}
.btn-primary:hover{background:color-mix(in srgb,var(--brand) 90%,#000)}
.btn-primary:active{transform:translateY(2px);box-shadow:0 1px 0 var(--brand-dark)}
.btn-primary:disabled{opacity:.5;cursor:default;transform:none}
.btn-ghost{background:var(--surface);border:1px solid var(--line);box-shadow:0 2px 0 var(--line)}
.btn-ghost:hover{background:var(--surface-2)}
.back-btn{border-radius:99px;padding:7px 16px;box-shadow:none}

/* ---------- top bar ---------- */
.topbar{background:color-mix(in srgb,var(--surface) 90%,transparent);border-bottom:1px solid var(--line)}
.topbar .brand{font-family:"Fraunces",Georgia,serif;font-weight:700;letter-spacing:-.01em}
.topbar .brand-mark{background:var(--brand);transform:rotate(-6deg);border-radius:10px}
.langpick{border-radius:12px}
@media (max-width:560px){
  .topbar-in{padding:10px 16px;gap:10px}
  .topbar .brand{font-size:16px;gap:8px}
  .topbar .brand-mark{width:28px;height:28px}
  .langpick{padding:4px 8px}
  .langpick .globe{display:none}
  .langpick select{max-width:96px;font-size:13px}
  .wrap{padding:0 16px}
}

/* ---------- navigation: bottom bar (phones) / sidebar (wide) ---------- */
.side-brand,.side-card{display:none}
.nav-btn{border-radius:12px;color:var(--muted)}
.nav-btn[aria-current="page"]{background:var(--brand-soft);color:var(--brand)}
@media (min-width:1024px){
  body.logged:not(.pub){padding-bottom:0;padding-left:var(--side)}
  body.logged:not(.pub) .topbar .brand{display:none}
  body.logged .bottomnav{
    top:0;bottom:0;right:auto;width:var(--side);display:flex;flex-direction:column;gap:18px;padding:22px 16px;
    background:var(--surface);border-top:0;border-right:1px solid var(--line);backdrop-filter:none;
  }
  .side-brand{display:flex;align-items:center;gap:10px;padding:0 6px 14px;border-bottom:1px dashed var(--line);
    font-family:"Fraunces",Georgia,serif;font-weight:700;font-size:18px;line-height:1.15;color:var(--ink)}
  .side-mark{width:42px;height:42px;flex:none}
  .bottomnav-in{flex-direction:column;padding:0;gap:4px;max-width:none;margin:0}
  .nav-btn{flex:none;flex-direction:row;justify-content:flex-start;gap:12px;padding:11px 14px;font-size:15px;font-weight:600;position:relative}
  .nav-btn .ic{font-size:19px;width:24px;text-align:center}
  .nav-btn:hover{background:var(--surface-2);color:var(--ink)}
  .nav-btn[aria-current="page"]::before{content:"";position:absolute;left:-16px;top:8px;bottom:8px;width:4px;border-radius:0 4px 4px 0;background:var(--brand)}
  #nav-logout{margin-top:6px}
  .side-card{display:block;margin-top:auto;background:linear-gradient(160deg,var(--sky),var(--brand-soft));border-radius:16px;padding:14px 16px}
  .side-row{display:flex;align-items:baseline;gap:8px;margin-top:6px;font-size:13px;color:var(--muted)}
  .side-row b{font-family:"Fraunces",Georgia,serif;font-size:22px;color:var(--ink)}
  .side-tip{font-size:12.5px;color:var(--ink);margin-top:10px;line-height:1.45;opacity:.85}
}

/* ---------- dashboard ---------- */
.dash-hero{
  position:relative;overflow:hidden;display:grid;grid-template-columns:1fr 280px;gap:20px;align-items:center;
  margin-top:26px;padding:34px 34px;border-radius:24px;
  background:radial-gradient(120% 140% at 85% 10%,#FFFFFF 0,transparent 45%),linear-gradient(135deg,#D6E9FB,#E4F4EC);
  border:1px solid var(--line);
}
:root[data-theme="dark"] .dash-hero{background:linear-gradient(135deg,#17305A,#163D35)}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .dash-hero{background:linear-gradient(135deg,#17305A,#163D35)} }
.dash-hi{font-size:clamp(32px,4.4vw,50px);margin:6px 0 10px;line-height:1.05}
.dash-hi #home-name{font-style:italic;color:var(--brand)}
.dash-lead{color:var(--muted);font-size:16.5px;max-width:46ch}
.dash-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.dash-hero-art{position:relative;height:200px}
.dash-cloud{position:absolute;color:#fff;opacity:.95;filter:drop-shadow(0 6px 10px rgba(22,48,77,.08))}
.dash-cloud.c1{width:120px;left:0;top:6px}
.dash-cloud.c2{width:84px;right:0;bottom:22px}
:root[data-theme="dark"] .dash-cloud{opacity:.12}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .dash-cloud{opacity:.12} }
.dash-ava-ring{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:132px;height:132px;border-radius:50%;
  background:var(--surface);display:grid;place-items:center;box-shadow:0 0 0 10px rgba(255,255,255,.45),var(--shadow)}
.dash-ava-ring .mini-ava{width:92px;height:92px;border-radius:50%;font-size:52px;background:var(--surface-2)}
.dash-hm{position:absolute;width:62px;right:34px;top:12px;transform:rotate(12deg);animation:bob 3.2s ease-in-out infinite}
@keyframes bob{50%{transform:rotate(6deg) translateY(-6px)}}
.dash-star{position:absolute;color:var(--star)}
.dash-star.s1{width:24px;left:44px;bottom:28px}
.dash-star.s2{width:16px;left:72px;top:40px}
@media (max-width:760px){
  .dash-hero{grid-template-columns:1fr;padding:26px 22px}
  .dash-hero-art{display:none}
}
.dash-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 14px;display:flex;flex-direction:column;gap:2px}
.stat-ic{font-size:20px}
.stat b{font-family:"Fraunces",Georgia,serif;font-size:30px;line-height:1.1;font-variant-numeric:tabular-nums}
.stat span:last-child{font-size:13px;color:var(--muted)}
@media (max-width:760px){.dash-stats{grid-template-columns:repeat(2,1fr)}}
.dash-continue{display:flex;align-items:center;gap:18px;margin-top:16px;padding:18px 20px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}
.dc-book{flex:none;width:56px;height:68px;border-radius:6px 12px 12px 6px;display:grid;place-items:center;font-size:28px;
  background:linear-gradient(90deg,var(--brand-dark) 0 8px,var(--brand) 8px)}
.dc-txt{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.dc-txt b{font-size:17px}
.dc-txt #dc-crumb{font-size:13px;color:var(--muted)}
.dc-bar{height:6px;border-radius:6px;background:var(--surface-2);margin-top:8px;overflow:hidden;max-width:340px}
.dc-bar i{display:block;height:100%;background:var(--brand);border-radius:6px}
@media (max-width:560px){.dash-continue{flex-wrap:wrap}.dash-continue .btn{width:100%}}

.section{border-top:0;padding:38px 0 8px}
.section h2{font-size:clamp(26px,3.2vw,34px)}
.format{border-radius:var(--radius)}
.format-ic{background:var(--sky);border-radius:14px}
.contacts{border-radius:var(--radius)}

/* ---------- subjects = textbook covers ---------- */
.folders{gap:18px}
.folder{
  position:relative;overflow:hidden;border-radius:8px 18px 18px 8px;border:1px solid var(--line);
  padding:22px 20px 20px 30px;background:var(--surface);box-shadow:var(--shadow);gap:6px;
}
.folder::before{content:"";position:absolute;left:0;top:0;bottom:0;width:12px;background:var(--cv,var(--brand));
  box-shadow:inset -2px 0 0 rgba(0,0,0,.12)}
.folder::after{content:"";position:absolute;left:12px;top:0;bottom:0;width:6px;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.0) 0 10px,rgba(0,0,0,.08) 10px 12px)}
.folder:hover{transform:translateY(-3px) rotate(-.4deg);border-color:var(--cv,var(--brand))}
.folder-ic{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;font-size:30px;
  background:color-mix(in srgb,var(--cv,var(--brand)) 16%,var(--surface))}
.folder-name{font-size:22px;margin-top:8px}
.folder-meta{font-size:13px;color:var(--muted)}
.folder-open{align-self:flex-start;margin-top:8px;padding:4px 12px;border-radius:99px;font-size:12.5px;font-weight:700;
  background:color-mix(in srgb,var(--cv,var(--brand)) 14%,var(--surface));color:var(--cv,var(--brand))}
.folder-open::after{content:" →"}
.subject{min-height:200px}
.subject.s-lang{--cv:#2E6BD1}
.subject.s-math{--cv:#158463}
.subject.s-bio{--cv:#6A9A2A}
.subject.s-art{--cv:#C2567A}
.subject .folder-ic{width:62px;height:62px;font-size:34px}
/* section covers inside a grade: a calm rotating set of colours */
#books-grid .folder:nth-child(6n+1){--cv:#158463}
#books-grid .folder:nth-child(6n+2){--cv:#2E6BD1}
#books-grid .folder:nth-child(6n+3){--cv:#C98A1B}
#books-grid .folder:nth-child(6n+4){--cv:#8A5CC2}
#books-grid .folder:nth-child(6n+5){--cv:#C2567A}
#books-grid .folder:nth-child(6n+6){--cv:#1F8FA0}
#books-grid .folder-ic{font-size:0}
#books-grid .folder-ic::before{content:"§";font-family:"Fraunces",Georgia,serif;font-size:28px;font-weight:700;color:var(--cv)}
#books-grid .folder-name{font-size:19px;line-height:1.2}
.folder-prog b{color:var(--cv,var(--muted))}
.fp-track i{background:var(--cv,var(--teal))}
.folder-page-head{gap:14px;margin-bottom:8px}
.folder-ic-lg{width:60px;height:60px;border-radius:16px;display:grid;place-items:center;background:var(--sky);font-size:32px}
.folder-soon{border-radius:var(--radius);background:var(--surface);border:2px dashed var(--line)}

/* ---------- grades = exercise books ---------- */
.grades{grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:16px}
.grade{
  position:relative;aspect-ratio:3/4;padding:16px 14px;border-radius:6px 14px 14px 6px;align-items:center;justify-content:flex-end;gap:6px;
  background:var(--gc,#2E6BD1);border:0;color:#fff;box-shadow:var(--shadow),inset 8px 0 0 rgba(0,0,0,.14);
}
.grade::before{content:"";position:absolute;left:18%;right:12%;top:18%;height:34%;border-radius:6px;background:rgba(255,255,255,.92);
  background-image:repeating-linear-gradient(180deg,transparent 0 11px,rgba(46,107,209,.25) 11px 12px)}
.grade:hover{transform:translateY(-4px) rotate(-1deg);box-shadow:0 18px 30px -18px rgba(0,0,0,.5),inset 8px 0 0 rgba(0,0,0,.14)}
.grade-n{position:absolute;left:18%;right:12%;top:22%;text-align:center;color:var(--ink);font-family:"Fraunces",Georgia,serif;font-size:34px}
.grade-l{color:rgba(255,255,255,.92);font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase}
.grade:nth-child(6n+1){--gc:#2E6BD1}
.grade:nth-child(6n+2){--gc:#158463}
.grade:nth-child(6n+3){--gc:#D2463C}
.grade:nth-child(6n+4){--gc:#C98A1B}
.grade:nth-child(6n+5){--gc:#8A5CC2}
.grade:nth-child(6n+6){--gc:#1F8FA0}

/* group tasks banner */
.group-btn{border-radius:var(--radius);background:linear-gradient(135deg,var(--sky),var(--brand-soft));border:1px solid var(--line)}

/* ---------- section page: table of contents ---------- */
.sp-progress{border-radius:var(--radius);box-shadow:var(--shadow)}
.sp-node.done .sp-num{background:var(--brand);border-color:var(--brand)}
.sp-seg.done,.sp-bar i{background:var(--brand)}
.sp-st{color:var(--star)}
.sp-stars{color:var(--ink)}
.rules-btn{border-radius:99px}
.lesson-list{gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:8px 6px;box-shadow:var(--shadow)}
.lesson-list li + li .lesson-row{border-top:1px dashed var(--line)}
.lesson-row{border:0;border-radius:10px;background:transparent;padding:14px 14px}
.lesson-row:hover{transform:none;box-shadow:none;background:var(--surface-2)}
.lesson-row .n{border-radius:50%;background:var(--sky);color:var(--accent);font-family:"Fraunces",Georgia,serif;font-size:15px;width:34px;height:34px}
.lesson-row .txt{display:flex;flex-direction:column}
.lesson-row .txt b{font-size:16px}
.lesson-row .go{min-width:56px;text-align:right}
.lesson-row .go.scored{background:var(--brand-soft);color:var(--brand)}

/* ---------- lesson page ---------- */
.lesson-crumb{font-family:"JetBrains Mono",monospace;font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--brand)}
.lesson-goal{background:var(--surface);border:1px solid var(--line);border-left:5px solid var(--star);box-shadow:var(--shadow)}
.lesson-best{color:var(--brand)}

/* squared notebook paper with a red margin line (and punched holes) */
.lecture-card,.quiz-card,.result-card{
  position:relative;border-radius:6px 18px 18px 6px;border:1px solid var(--line);box-shadow:var(--shadow);
  background-color:var(--surface);
  background-image:
    linear-gradient(90deg,transparent 46px,color-mix(in srgb,var(--danger) 55%,transparent) 46px 48px,transparent 48px),
    linear-gradient(var(--paper-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--paper-line) 1px,transparent 1px);
  background-size:100% 100%,22px 22px,22px 22px;
  padding-left:66px;
}
.lecture-card::before,.quiz-card::before,.result-card::before{
  content:"";position:absolute;left:14px;top:40px;bottom:40px;width:14px;
  background:radial-gradient(circle,var(--bg) 0 5px,color-mix(in srgb,var(--line) 80%,transparent) 5px 6px,transparent 6.5px) 0 0/14px 64px repeat-y}
.lecture-card{max-width:72ch}
@media (max-width:560px){
  .lecture-card,.quiz-card,.result-card{padding-left:40px;background-image:
    linear-gradient(90deg,transparent 26px,color-mix(in srgb,var(--danger) 55%,transparent) 26px 28px,transparent 28px),
    linear-gradient(var(--paper-line) 1px,transparent 1px),linear-gradient(90deg,var(--paper-line) 1px,transparent 1px)}
  .lecture-card::before,.quiz-card::before,.result-card::before{left:6px;width:12px}
}
.quiz-help{background:color-mix(in srgb,var(--surface) 82%,var(--teal-soft));border:1px solid color-mix(in srgb,var(--teal) 25%,var(--line))}
.quiz-kind{background:var(--accent-soft);color:var(--accent)}
.quiz-prompt{color:var(--ink)}
.quiz-opt,.key,.mcard,.lcard{background:var(--surface)}
.quiz-opt{border-radius:14px;box-shadow:0 3px 0 var(--line)}
.quiz-opt:hover:not(:disabled){border-color:var(--accent);box-shadow:0 3px 0 var(--accent)}
.quiz-opt.right{box-shadow:0 3px 0 var(--teal)}
.quiz-opt.wrong{box-shadow:0 3px 0 var(--danger)}
.ncard{box-shadow:none}
/* the teacher's pen */
.quiz-feedback{font-family:"Caveat",cursive;font-size:27px;font-weight:700;line-height:1.1;min-height:30px}
.quiz-feedback.ok{color:var(--teal)}
.quiz-feedback.no{color:var(--danger)}
.quiz-track > i.ok{background:var(--teal)}
.quiz-track > i.now{background:var(--accent)}
.quiz-score{color:var(--brand)}
.lec-node.done{background:var(--brand);border-color:var(--brand)}
.lec-seg.done{background:var(--brand)}
.lec-node.on{border-color:var(--accent);color:var(--accent)}
.lec-point{background:color-mix(in srgb,var(--surface) 70%,var(--sky))}
.lec-ex{background:color-mix(in srgb,var(--surface) 70%,var(--teal-soft))}
.lec-demo{background:var(--surface)}
.rule-badge,.quiz-help-label{font-family:"Caveat",cursive;font-size:20px;letter-spacing:0;text-transform:none;font-weight:700}
.kind-chip{background:var(--surface)}

/* the result: a teacher's stamp on the page */
.result-card{text-align:center}
.result-emoji{display:inline-grid;place-items:center;width:110px;height:110px;border-radius:50%;margin-bottom:6px;
  border:4px double var(--danger);color:var(--danger);transform:rotate(-10deg);font-size:54px;background:color-mix(in srgb,var(--surface) 85%,var(--danger))}
.res-star.on{color:var(--star)}
.result-card h2{font-size:32px}
.rk-bar i{background:var(--brand)}

/* ---------- rules page ---------- */
.rules-box{border-radius:var(--radius);box-shadow:var(--shadow)}
.rule-card{border-left-color:var(--brand);background:var(--surface)}
.rule-n{background:var(--brand)}

/* ---------- profile ---------- */
.pcard,.panel{border-radius:var(--radius)}
.pstat b{font-family:"Fraunces",Georgia,serif}

/* footer inside the app */
.footer{border-top:1px dashed var(--line)}