/* ============================================================
   PatternFeed — design system
   Dark, high-contrast, gradient-forward. Built for thumbs.
   ============================================================ */

:root{
  --bg:#08080c;
  --bg-soft:#101018;
  --bg-card:#14141f;
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --txt:#f4f4f8;
  --txt-dim:#a9a9bd;
  --txt-faint:#6d6d84;

  --accent:#7c5cff;
  --accent-2:#ff4d94;
  --ok:#2fd8a0;
  --warn:#ffb547;
  --bad:#ff5f6d;

  --code-bg:#0c0c14;

  --r-lg:22px;
  --r-md:16px;
  --r-sm:10px;

  --safe-t:env(safe-area-inset-top,0px);
  --safe-b:env(safe-area-inset-bottom,0px);
  --tabh:60px;

  --ff: ui-sans-serif,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --ff-mono: ui-monospace,"SF Mono","Cascadia Mono",Menlo,Consolas,monospace;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}

html,body{height:100%;margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:var(--ff);
  overscroll-behavior:none;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;color:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
[hidden]{display:none!important}

/* ============================ SPLASH ============================ */
.splash{
  position:fixed;inset:0;z-index:100;
  display:grid;place-items:center;
  background:radial-gradient(120% 90% at 50% 0%,#231a4d 0%,#0b0b12 55%,#08080c 100%);
  transition:opacity .5s ease,visibility .5s;
}
.splash.is-gone{opacity:0;visibility:hidden}
.splash-logo{text-align:center;animation:rise .7s cubic-bezier(.2,.9,.2,1) both}
.splash-mark{display:flex;flex-direction:column;gap:7px;align-items:center;margin-bottom:20px}
.splash-mark span{
  display:block;height:9px;border-radius:99px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  animation:stack 1.4s ease-in-out infinite;
}
.splash-mark span:nth-child(1){width:66px}
.splash-mark span:nth-child(2){width:46px;animation-delay:.14s}
.splash-mark span:nth-child(3){width:26px;animation-delay:.28s}
.splash-logo h1{font-size:31px;font-weight:800;letter-spacing:-.6px}
.splash-logo p{color:var(--txt-faint);font-size:13.5px;margin-top:6px;letter-spacing:.2px}
@keyframes stack{0%,100%{transform:translateY(0);opacity:.75}50%{transform:translateY(-5px);opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ============================ APP FRAME ============================ */
.app{position:fixed;inset:0;display:flex;flex-direction:column;overflow:hidden}
.view{position:absolute;inset:0;bottom:0}
.view-scroll{
  overflow-y:auto;overflow-x:hidden;
  -webkit-overflow-scrolling:touch;
  padding-top:calc(var(--safe-t) + 8px);
}
.scroll-pad{height:calc(var(--tabh) + var(--safe-b) + 30px)}

/* ============================ FEED ============================ */
.view-feed{display:flex;flex-direction:column}

.feed-topbar{
  position:absolute;top:0;left:0;right:0;z-index:20;
  padding:calc(var(--safe-t) + 9px) 12px 10px;
  background:linear-gradient(to bottom,rgba(6,6,10,.92) 0%,rgba(6,6,10,.55) 62%,transparent 100%);
  pointer-events:none;
}
.feed-topbar > *{pointer-events:auto}

.segbar{display:flex;gap:3px;margin-bottom:11px;height:2.5px}
.seg{flex:1;background:rgba(255,255,255,.2);border-radius:99px;overflow:hidden}
.seg.is-done{background:rgba(255,255,255,.72)}
.seg.is-now{background:rgba(255,255,255,.2)}
.seg.is-now::after{
  content:"";display:block;height:100%;width:100%;
  background:#fff;transform-origin:left;
  animation:segfill .45s ease both;
}
@keyframes segfill{from{transform:scaleX(0)}to{transform:scaleX(1)}}

.feed-topbar-row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.feed-topbar-right{display:flex;align-items:center;gap:8px}

.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 12px 6px 8px;border-radius:99px;
  background:rgba(255,255,255,.1);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(14px);
  font-size:13px;font-weight:650;letter-spacing:.1px;
  max-width:66vw;
}
.chip-icon{font-size:14px;line-height:1}
.chip-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.streak-mini{
  display:flex;align-items:center;gap:3px;
  font-size:13px;font-weight:750;
  padding:5px 10px;border-radius:99px;
  background:rgba(255,181,71,.14);border:1px solid rgba(255,181,71,.3);
  color:#ffca70;
}
.icon-btn{
  width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;font-size:16px;
  background:rgba(255,255,255,.1);border:1px solid var(--line-strong);
  backdrop-filter:blur(14px);
}
.icon-btn:active{transform:scale(.9)}

.feed{
  flex:1;min-height:0;
  overflow-y:scroll;overflow-x:hidden;
  scroll-snap-type:y mandatory;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none;
  outline:none;
}
.feed::-webkit-scrollbar{display:none}

.swipe-hint{
  position:absolute;left:50%;transform:translateX(-50%);
  bottom:calc(var(--tabh) + var(--safe-b) + 16px);
  z-index:15;text-align:center;color:rgba(255,255,255,.6);
  font-size:11.5px;letter-spacing:.9px;text-transform:uppercase;font-weight:650;
  animation:bob 1.9s ease-in-out infinite;pointer-events:none;
  transition:opacity .4s;
}
.swipe-hint.is-gone{opacity:0}
.swipe-hint-arrow{font-size:19px;line-height:.7}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,-8px)}}

/* ============================ CARD ============================ */
.card{
  height:100%;width:100%;
  scroll-snap-align:start;scroll-snap-stop:always;
  position:relative;
  display:flex;flex-direction:column;
  padding:calc(var(--safe-t) + 74px) 20px calc(var(--tabh) + var(--safe-b) + 26px);
  overflow:hidden;
}
.card-bg{position:absolute;inset:0;z-index:0;opacity:.95}
.card-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to bottom,rgba(4,4,8,.34) 0%,rgba(4,4,8,.06) 34%,rgba(4,4,8,.55) 80%,rgba(4,4,8,.9) 100%);
}
.card-inner{
  position:relative;z-index:2;
  flex:1;min-height:0;
  display:flex;flex-direction:column;
  overflow-y:auto;overflow-x:hidden;
  scrollbar-width:none;
  animation:cardIn .42s cubic-bezier(.2,.9,.2,1) both;
}
.card-inner::-webkit-scrollbar{display:none}
@keyframes cardIn{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:none}}

.kicker{
  display:inline-flex;align-items:center;gap:6px;align-self:flex-start;
  font-size:10.5px;font-weight:800;letter-spacing:1.3px;text-transform:uppercase;
  padding:5px 11px;border-radius:99px;margin-bottom:14px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  backdrop-filter:blur(10px);
}

.card h3.c-title{
  font-size:26px;line-height:1.16;font-weight:800;letter-spacing:-.6px;
  margin-bottom:12px;text-wrap:balance;
}
.card .c-body{font-size:15.5px;line-height:1.62;color:#e5e5ef}
.card .c-body strong{color:#fff;font-weight:750}
.card .c-body em{color:#ffd9a8;font-style:normal;font-weight:650}
.card .c-body + .c-body{margin-top:11px}
.card .c-body code{
  font-family:var(--ff-mono);font-size:.88em;
  background:rgba(255,255,255,.13);padding:1.5px 6px;border-radius:6px;
  border:1px solid rgba(255,255,255,.1);
}

.spacer{flex:1;min-height:10px}

/* Centred card types hold short text that would otherwise sit under the
   action rail, so keep their content clear of it. */
.card-hook .card-inner,
.card-flex .card-inner,
.card-quiz .card-inner{padding-right:52px}

/* -------- HOOK card (the scroll-stopper) -------- */
.card-hook .card-inner{justify-content:center}
.card-hook .hook-txt{
  font-size:37px;line-height:1.1;font-weight:850;letter-spacing:-1.4px;
  text-wrap:balance;
}
.card-hook .hook-sub{
  margin-top:18px;font-size:16px;line-height:1.55;
  color:rgba(255,255,255,.84);font-weight:500;
}
.card-hook .hook-mark{
  font-size:58px;line-height:1;margin-bottom:18px;
  filter:drop-shadow(0 8px 22px rgba(0,0,0,.5));
}

/* -------- COVER card (topic intro) -------- */
.card-cover .card-inner{justify-content:center;text-align:center;align-items:center}
.cover-mark{
  width:96px;height:96px;border-radius:28px;display:grid;place-items:center;
  font-size:47px;margin-bottom:22px;
  background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.26);
  backdrop-filter:blur(14px);
  box-shadow:0 22px 60px rgba(0,0,0,.45);
  animation:pop .5s cubic-bezier(.2,1.5,.4,1) both;
}
@keyframes pop{from{transform:scale(.6);opacity:0}to{transform:none;opacity:1}}
.cover-tag{
  font-size:10.5px;font-weight:800;letter-spacing:1.6px;text-transform:uppercase;
  color:rgba(255,255,255,.7);margin-bottom:9px;
}
.cover-name{font-size:38px;font-weight:850;letter-spacing:-1.2px;line-height:1.08}
.cover-hook{margin-top:13px;font-size:16.5px;line-height:1.5;color:rgba(255,255,255,.86);max-width:20em}
.cover-meta{
  margin-top:24px;display:flex;gap:9px;flex-wrap:wrap;justify-content:center;
}
.cover-meta span{
  font-size:11.5px;font-weight:700;padding:5px 11px;border-radius:99px;
  background:rgba(0,0,0,.3);border:1px solid rgba(255,255,255,.18);
}

/* -------- CODE -------- */
.codebox{
  margin-top:14px;border-radius:var(--r-md);overflow:hidden;
  background:var(--code-bg);border:1px solid var(--line-strong);
  box-shadow:0 14px 40px rgba(0,0,0,.45);
}
.codebar{
  display:flex;align-items:center;gap:7px;
  padding:8px 12px;border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.035);
}
.codebar i{width:9px;height:9px;border-radius:50%;background:#3a3a4c;display:block}
.codebar i:first-child{background:#ff5f56}
.codebar i:nth-child(2){background:#ffbd2e}
.codebar i:nth-child(3){background:#27c93f}
.codebar span{
  margin-left:5px;font-family:var(--ff-mono);font-size:11px;color:var(--txt-faint);
}
.codebox pre{
  margin:0;padding:13px 14px;overflow-x:auto;
  font-family:var(--ff-mono);font-size:12.2px;line-height:1.65;
  -webkit-overflow-scrolling:touch;
}
.codebox pre::-webkit-scrollbar{height:0}
.codebox.is-bad{border-color:rgba(255,95,109,.4)}
.codebox.is-good{border-color:rgba(47,216,160,.38)}
.code-verdict{
  display:flex;align-items:center;gap:7px;
  padding:8px 13px;font-size:12px;font-weight:700;
  border-top:1px solid var(--line);
}
.is-bad .code-verdict{background:rgba(255,95,109,.12);color:#ff97a1}
.is-good .code-verdict{background:rgba(47,216,160,.11);color:#6ee7bd}

/* Java token colours */
.t-key{color:#ff7bc0;font-weight:600}
.t-type{color:#5ee2c9}
.t-str{color:#ffd58a}
.t-num{color:#c0a5ff}
.t-com{color:#6a6a85;font-style:italic}
.t-ann{color:#ffa96b}
.t-fn{color:#8ec7ff}

/* -------- ANATOMY (labelled parts) -------- */
.anat{margin-top:14px;display:flex;flex-direction:column;gap:9px}
.anat-row{
  display:flex;gap:11px;align-items:flex-start;
  padding:12px 13px;border-radius:var(--r-md);
  background:rgba(255,255,255,.07);border:1px solid var(--line);
  animation:slideIn .4s ease both;
}
.anat-row:nth-child(1){animation-delay:.04s}
.anat-row:nth-child(2){animation-delay:.1s}
.anat-row:nth-child(3){animation-delay:.16s}
.anat-row:nth-child(4){animation-delay:.22s}
.anat-row:nth-child(5){animation-delay:.28s}
@keyframes slideIn{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:none}}
.anat-n{
  flex:0 0 25px;height:25px;border-radius:8px;display:grid;place-items:center;
  font-size:12px;font-weight:800;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.2);
}
.anat-tx b{display:block;font-size:14px;margin-bottom:2px;font-weight:750}
.anat-tx span{font-size:13.2px;line-height:1.5;color:#d6d6e4}
.anat-tx code{font-family:var(--ff-mono);font-size:.9em;background:rgba(0,0,0,.35);padding:1px 5px;border-radius:5px}

/* -------- VS (comparison) -------- */
.vs{margin-top:15px;display:flex;flex-direction:column;gap:8px}
.vs-head{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.vs-head div{
  padding:10px;border-radius:12px;text-align:center;
  font-size:13.5px;font-weight:800;letter-spacing:-.2px;
}
.vs-head div:first-child{background:rgba(124,92,255,.24);border:1px solid rgba(124,92,255,.45)}
.vs-head div:last-child{background:rgba(255,77,148,.22);border:1px solid rgba(255,77,148,.42)}
.vs-row{
  display:grid;grid-template-columns:1fr 1fr;gap:8px;
}
.vs-row > div{
  padding:11px;border-radius:12px;font-size:13px;line-height:1.5;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
}
.vs-lbl{
  font-size:10.5px;font-weight:800;letter-spacing:1.1px;text-transform:uppercase;
  color:var(--txt-faint);text-align:center;padding:3px 0 1px;
}
.vs-punch{
  margin-top:13px;padding:13px 14px;border-radius:var(--r-md);
  background:linear-gradient(135deg,rgba(124,92,255,.2),rgba(255,77,148,.15));
  border:1px solid rgba(255,255,255,.2);
  font-size:14.5px;line-height:1.5;font-weight:650;
}

/* -------- MAP (ascii diagram) -------- */
.mapbox{
  margin-top:14px;padding:15px 12px;border-radius:var(--r-md);
  background:var(--code-bg);border:1px solid var(--line-strong);
  overflow-x:auto;-webkit-overflow-scrolling:touch;
}
.mapbox::-webkit-scrollbar{height:0}
.mapbox pre{
  margin:0;font-family:var(--ff-mono);font-size:11.4px;line-height:1.55;
  color:#a9c8ff;white-space:pre;
}

/* -------- STORY (analogy) -------- */
.story{
  margin-top:14px;padding:16px;border-radius:var(--r-md);
  background:rgba(255,255,255,.07);border:1px solid var(--line);
  border-left:3px solid var(--warn);
}
.story-ico{font-size:30px;margin-bottom:9px;display:block}
.story p{font-size:15px;line-height:1.62;color:#eaeaf4}

/* -------- WILD (real world) -------- */
.wild{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.wild-item{
  display:flex;gap:11px;align-items:center;
  padding:11px 13px;border-radius:13px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
}
.wild-ico{font-size:20px;flex:0 0 auto}
.wild-tx b{display:block;font-size:13.8px;font-weight:750}
.wild-tx span{font-size:12.6px;color:var(--txt-dim);line-height:1.45}

/* -------- QUIZ card -------- */
.quiz-q{
  margin-top:8px;font-size:21px;line-height:1.35;font-weight:750;letter-spacing:-.3px;
}
.quiz-reveal{
  margin-top:16px;width:100%;padding:14px;border-radius:14px;
  background:rgba(255,255,255,.12);border:1px solid var(--line-strong);
  font-size:14.5px;font-weight:700;backdrop-filter:blur(10px);
  transition:transform .12s;
}
.quiz-reveal:active{transform:scale(.97)}
.quiz-a{
  margin-top:14px;padding:15px;border-radius:var(--r-md);
  background:rgba(47,216,160,.13);border:1px solid rgba(47,216,160,.36);
  font-size:14.8px;line-height:1.6;
  animation:cardIn .32s ease both;
}
.quiz-a b{color:#7ff0c5}

/* -------- FLEX (memorise this) -------- */
.card-flex .card-inner{justify-content:center}
.flex-quote{
  font-size:25px;line-height:1.36;font-weight:750;letter-spacing:-.5px;
  padding-left:16px;border-left:4px solid rgba(255,255,255,.5);
  text-wrap:balance;
}
.flex-note{margin-top:20px;font-size:14.5px;line-height:1.6;color:rgba(255,255,255,.8)}
.flex-badge{
  margin-bottom:18px;align-self:flex-start;
  font-size:10.5px;font-weight:800;letter-spacing:1.4px;text-transform:uppercase;
  padding:6px 12px;border-radius:99px;
  background:rgba(0,0,0,.35);border:1px solid rgba(255,255,255,.28);
}

/* -------- RAIL (right side actions) -------- */
.rail{
  position:absolute;right:12px;bottom:calc(var(--tabh) + var(--safe-b) + 30px);
  z-index:6;display:flex;flex-direction:column;gap:15px;align-items:center;
}
.rail button{
  display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:10px;font-weight:700;color:rgba(255,255,255,.9);
  text-shadow:0 1px 6px rgba(0,0,0,.6);
}
.rail-ico{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  font-size:20px;
  background:rgba(0,0,0,.34);border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(12px);
  transition:transform .16s cubic-bezier(.2,1.6,.4,1),background .2s;
}
.rail button:active .rail-ico{transform:scale(.86)}
.rail button.is-on .rail-ico{background:rgba(255,77,148,.34);border-color:rgba(255,77,148,.6)}
.rail button.is-done .rail-ico{background:rgba(47,216,160,.32);border-color:rgba(47,216,160,.6)}
.heartburst{
  position:absolute;left:50%;top:50%;z-index:9;pointer-events:none;
  font-size:96px;transform:translate(-50%,-50%) scale(0);
}
.heartburst.go{animation:burst .8s cubic-bezier(.2,1.6,.4,1) both}
@keyframes burst{
  0%{transform:translate(-50%,-50%) scale(0);opacity:0}
  22%{transform:translate(-50%,-50%) scale(1.18);opacity:1}
  60%{transform:translate(-50%,-50%) scale(1);opacity:1}
  100%{transform:translate(-50%,-130%) scale(.85);opacity:0}
}

/* ============================ PAGE HEADERS ============================ */
.page-head{padding:14px 18px 6px}
.page-head h2{font-size:31px;font-weight:850;letter-spacing:-1px}
.page-sub{color:var(--txt-faint);font-size:13.5px;margin-top:4px}

.searchwrap{margin-top:15px}
.search{
  width:100%;padding:12px 15px;border-radius:14px;
  background:var(--bg-soft);border:1px solid var(--line);
  color:var(--txt);font-size:15px;outline:none;
}
.search:focus{border-color:rgba(124,92,255,.6);background:#141420}
.search::placeholder{color:var(--txt-faint)}

.catrow{
  display:flex;gap:8px;margin-top:14px;padding-bottom:4px;
  overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;
}
.catrow::-webkit-scrollbar{display:none}
.catpill{
  flex:0 0 auto;padding:8px 14px;border-radius:99px;
  font-size:12.8px;font-weight:700;white-space:nowrap;
  background:var(--bg-soft);border:1px solid var(--line);color:var(--txt-dim);
}
.catpill.is-on{background:#fff;color:#0a0a12;border-color:#fff}

/* ============================ TOPIC GRID ============================ */
.topic-grid{
  padding:14px 14px 0;
  display:grid;grid-template-columns:repeat(2,1fr);gap:11px;
}
.tcard{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  min-height:152px;padding:14px;
  display:flex;flex-direction:column;justify-content:space-between;
  border:1px solid var(--line);text-align:left;
  transition:transform .14s;
}
.tcard:active{transform:scale(.965)}
.tcard > *{position:relative;z-index:1}
.tcard > .tcard-bg{position:absolute;inset:0;z-index:0}
.tcard-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(165deg,rgba(0,0,0,0) 20%,rgba(0,0,0,.42) 100%)}
.tcard-ico{font-size:31px}
.tcard-name{font-size:16px;font-weight:800;letter-spacing:-.4px;line-height:1.18;margin-top:auto}
.tcard-hook{font-size:11.8px;color:rgba(255,255,255,.78);line-height:1.4;margin-top:4px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tcard-bar{margin-top:10px;height:3.5px;border-radius:99px;background:rgba(0,0,0,.4);overflow:hidden}
.tcard-bar i{display:block;height:100%;background:#fff;border-radius:99px;transition:width .5s}
.tcard-badge{
  position:absolute;top:11px;right:11px;z-index:2;
  font-size:10px;font-weight:800;padding:3.5px 8px;border-radius:99px;
  background:rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.22);
}
.tcard.is-complete .tcard-badge{background:rgba(47,216,160,.85);border-color:transparent;color:#04241a}

.empty{padding:50px 24px;text-align:center;color:var(--txt-faint);font-size:14.5px}

/* ============================ QUIZ VIEW ============================ */
.quizwrap{padding:12px 16px 0}
.qcard{
  border-radius:var(--r-lg);padding:18px;margin-bottom:12px;
  background:var(--bg-card);border:1px solid var(--line);
}
.qcard-top{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.qcard-chip{
  font-size:10.5px;font-weight:800;letter-spacing:.9px;text-transform:uppercase;
  padding:4px 9px;border-radius:99px;background:rgba(124,92,255,.2);
  border:1px solid rgba(124,92,255,.4);color:#c3b1ff;
}
.qcard-q{font-size:17px;line-height:1.42;font-weight:700;letter-spacing:-.2px}
.qcard-a{
  margin-top:13px;padding:13px;border-radius:13px;font-size:14.2px;line-height:1.58;
  background:rgba(47,216,160,.1);border:1px solid rgba(47,216,160,.3);color:#dff7ec;
}
.qcard-btn{
  margin-top:13px;width:100%;padding:11px;border-radius:12px;
  background:rgba(255,255,255,.09);border:1px solid var(--line-strong);
  font-size:13.5px;font-weight:700;
}
.qgrade{display:flex;gap:8px;margin-top:11px}
.qgrade button{
  flex:1;padding:10px;border-radius:12px;font-size:13px;font-weight:750;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.06);
}
.qgrade button.g-no{color:#ff97a1;border-color:rgba(255,95,109,.35)}
.qgrade button.g-yes{color:#6ee7bd;border-color:rgba(47,216,160,.35)}

.quizbar{
  display:flex;gap:8px;padding:0 16px 12px;
}
.quizbar button{
  flex:1;padding:11px;border-radius:12px;font-size:13px;font-weight:750;
  background:var(--bg-soft);border:1px solid var(--line);color:var(--txt-dim);
}
.quizbar button.is-on{background:#fff;color:#0a0a12;border-color:#fff}

/* ============================ YOU VIEW ============================ */
.you-hero{
  margin:12px 16px;padding:22px 18px;border-radius:var(--r-lg);
  background:linear-gradient(135deg,#2a1d5e,#4a1d47 55%,#1a1230);
  border:1px solid var(--line-strong);text-align:center;
}
.you-ring{
  width:104px;height:104px;margin:0 auto 14px;border-radius:50%;
  display:grid;place-items:center;position:relative;
  background:conic-gradient(var(--accent) calc(var(--p,0) * 1%),rgba(255,255,255,.13) 0);
}
.you-ring::before{content:"";position:absolute;inset:8px;border-radius:50%;background:#1b1436}
.you-ring b{position:relative;font-size:27px;font-weight:850;letter-spacing:-1px}
.you-ring i{position:relative;display:block;font-size:9.5px;font-weight:800;letter-spacing:1.3px;color:var(--txt-dim);font-style:normal;margin-top:-2px}
.you-lvl{font-size:19px;font-weight:800;letter-spacing:-.4px}
.you-lvl-sub{font-size:13px;color:var(--txt-dim);margin-top:4px}

.statgrid{padding:0 16px;display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:14px}
.stat{
  padding:15px;border-radius:var(--r-md);
  background:var(--bg-card);border:1px solid var(--line);
}
.stat b{display:block;font-size:25px;font-weight:850;letter-spacing:-.9px}
.stat span{font-size:11.5px;color:var(--txt-faint);font-weight:650;letter-spacing:.4px;text-transform:uppercase}

.sect-h{padding:8px 18px 10px;font-size:12px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase;color:var(--txt-faint)}

.prog-list{padding:0 16px}
.prog-row{
  display:flex;align-items:center;gap:12px;padding:12px 0;
  border-bottom:1px solid var(--line);
}
.prog-ico{font-size:22px;flex:0 0 auto;width:26px;text-align:center}
.prog-mid{flex:1;min-width:0}
.prog-mid b{display:block;font-size:14px;font-weight:700;margin-bottom:5px}
.prog-track{height:5px;border-radius:99px;background:rgba(255,255,255,.1);overflow:hidden}
.prog-track i{display:block;height:100%;border-radius:99px;transition:width .5s}
.prog-pct{font-size:12.5px;font-weight:750;color:var(--txt-dim);flex:0 0 auto;min-width:38px;text-align:right}

.savedlist{padding:0 16px}
.saved-row{
  display:flex;gap:11px;align-items:center;padding:12px;margin-bottom:9px;
  border-radius:14px;background:var(--bg-card);border:1px solid var(--line);text-align:left;width:100%;
}
.saved-row .s-ico{font-size:21px}
.saved-row .s-tx{flex:1;min-width:0}
.saved-row .s-tx b{display:block;font-size:13.6px;font-weight:700;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.saved-row .s-tx span{font-size:11.6px;color:var(--txt-faint)}
.saved-row .s-go{color:var(--txt-faint);font-size:17px}

.dangerzone{padding:20px 16px 0}
.btn-danger{
  width:100%;padding:13px;border-radius:13px;font-size:13.5px;font-weight:700;
  background:rgba(255,95,109,.12);border:1px solid rgba(255,95,109,.35);color:#ff97a1;
}

/* ============================ TABBAR ============================ */
.tabbar{
  position:absolute;bottom:0;left:0;right:0;z-index:30;
  height:calc(var(--tabh) + var(--safe-b));
  padding-bottom:var(--safe-b);
  display:grid;grid-template-columns:repeat(4,1fr);
  background:rgba(9,9,14,.92);
  backdrop-filter:blur(22px);
  border-top:1px solid var(--line);
}
.tab{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  color:var(--txt-faint);transition:color .2s;
}
.tab-ico{font-size:19px;line-height:1;transition:transform .18s}
.tab-txt{font-size:9.5px;font-weight:750;letter-spacing:.4px}
.tab.is-active{color:#fff}
.tab.is-active .tab-ico{transform:translateY(-1px) scale(1.12)}
.tab:active .tab-ico{transform:scale(.86)}

/* ============================ OVERLAYS ============================ */
.toast{
  position:fixed;left:50%;transform:translateX(-50%);
  bottom:calc(var(--tabh) + var(--safe-b) + 18px);z-index:60;
  padding:11px 18px;border-radius:99px;
  background:rgba(255,255,255,.96);color:#0a0a12;
  font-size:13.2px;font-weight:750;white-space:nowrap;
  box-shadow:0 10px 34px rgba(0,0,0,.5);
  animation:toastIn .3s cubic-bezier(.2,1.5,.4,1) both;
}
@keyframes toastIn{from{opacity:0;transform:translate(-50%,14px)}to{opacity:1;transform:translate(-50%,0)}}

.install-banner{
  position:fixed;left:12px;right:12px;z-index:55;
  bottom:calc(var(--tabh) + var(--safe-b) + 14px);
  padding:14px;border-radius:var(--r-lg);
  background:rgba(22,22,34,.97);border:1px solid var(--line-strong);
  backdrop-filter:blur(20px);
  box-shadow:0 16px 44px rgba(0,0,0,.6);
  animation:toastIn .35s cubic-bezier(.2,1.4,.4,1) both;
}
.install-txt strong{display:block;font-size:14.5px;font-weight:800}
.install-txt span{font-size:12.5px;color:var(--txt-dim)}
.install-actions{display:flex;gap:9px;margin-top:12px}
.btn-ghost,.btn-solid{
  flex:1;padding:10px;border-radius:11px;font-size:13.2px;font-weight:750;
}
.btn-ghost{background:rgba(255,255,255,.08);border:1px solid var(--line-strong);color:var(--txt-dim)}
.btn-solid{background:#fff;color:#0a0a12}

.levelup{
  position:fixed;inset:0;z-index:70;display:grid;place-items:center;
  background:rgba(4,4,8,.8);backdrop-filter:blur(8px);padding:24px;
}
.levelup-card{
  width:100%;max-width:320px;padding:28px 22px;border-radius:26px;text-align:center;
  background:linear-gradient(160deg,#2c1f63,#48204a);
  border:1px solid var(--line-strong);
  animation:pop .45s cubic-bezier(.2,1.5,.4,1) both;
}
.levelup-ring{
  width:78px;height:78px;margin:0 auto 16px;border-radius:50%;
  display:grid;place-items:center;font-size:30px;font-weight:850;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 12px 34px rgba(124,92,255,.5);
}
.levelup-card h3{font-size:23px;font-weight:850;letter-spacing:-.6px}
.levelup-card p{font-size:14px;color:rgba(255,255,255,.82);margin-top:7px;margin-bottom:20px}

/* ============================ TABLET / DESKTOP ============================ */
@media (min-width:720px){
  .app{max-width:460px;margin:0 auto;
    border-left:1px solid var(--line);border-right:1px solid var(--line)}
  body{background:#04040a}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .card-hook .hook-txt{font-size:40px}
}
/* small phones: shrink monospace so diagrams and code fit without scrolling */
@media (max-width:392px){
  .mapbox pre{font-size:10.4px}
  .codebox pre{font-size:11.4px}
  .card h3.c-title{font-size:24px}
  .card-hook .hook-txt{font-size:33px}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}