:root{
  --bg:#fff8f2;
  --panel:#ffffff;
  --panel2:#fff1f3;
  --text:#39252a;
  --muted:#8f6671;
  --line:#f3cfd7;
  --accent:#e95b83;
  --accent2:#ffb347;
  --sakura:#ffd7e2;
  --matcha:#58b368;
  --good:#22a06b;
  --bad:#e5484d;
  --warn:#f59e0b;
  --shadow:0 22px 60px rgba(192,96,124,.18);
  --radius:26px;
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;
  background:
    radial-gradient(circle at 10% 5%,rgba(255,204,218,.9) 0,transparent 28%),
    radial-gradient(circle at 90% 0%,rgba(255,218,154,.55) 0,transparent 24%),
    linear-gradient(135deg,#fff8f2 0%,#fff0f5 52%,#fffaf0 100%);
  color:var(--text);
  min-height:100vh;
  display:flex;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.36;
  background-image:
    radial-gradient(circle at 15% 20%,#ffc5d5 0 5px,transparent 6px),
    radial-gradient(circle at 72% 18%,#ffd0a6 0 4px,transparent 5px),
    radial-gradient(circle at 82% 70%,#ffc5d5 0 6px,transparent 7px),
    radial-gradient(circle at 28% 80%,#ffd0a6 0 4px,transparent 5px);
  background-size:260px 260px;
}

h1,h2,h3,p{margin:0}
button,select,input{font:inherit}
button{transition:.18s ease}
button:hover{transform:translateY(-1px)}

.mobile-menu-btn{
  display:none;
  position:fixed;
  top:16px;
  left:16px;
  z-index:60;
  width:48px;
  height:48px;
  border:0;
  border-radius:16px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;
  font-size:22px;
  font-weight:900;
  box-shadow:var(--shadow);
}
.sidebar-overlay{
  display:none;
  position:fixed;
  inset:0;
  z-index:45;
  background:rgba(70,31,41,.32);
  backdrop-filter:blur(3px);
}
.sidebar-overlay.show{display:block}

.sidebar{
  width:300px;
  padding:28px;
  background:rgba(255,255,255,.72);
  border-right:1px solid rgba(233,91,131,.18);
  backdrop-filter:blur(22px);
  position:sticky;
  top:0;
  height:100vh;
  z-index:50;
}
.brand{
  display:flex;
  gap:14px;
  align-items:center;
  margin-bottom:34px;
}
.logo{
  width:56px;
  height:56px;
  border-radius:20px;
  background:linear-gradient(135deg,#ff8fb1,#ffd166);
  display:grid;
  place-items:center;
  font-weight:900;
  font-size:27px;
  color:#fff;
  box-shadow:0 12px 30px rgba(233,91,131,.24);
}
.brand h1{font-size:23px;color:#3a2630}
.brand p,.eyebrow,.muted{color:var(--muted)}
nav{display:grid;gap:10px}
.nav{
  border:1px solid transparent;
  background:transparent;
  color:#7b5360;
  text-align:left;
  padding:14px 16px;
  border-radius:18px;
  cursor:pointer;
  font-weight:800;
}
.nav:hover,.nav.active{
  background:linear-gradient(135deg,rgba(255,143,177,.22),rgba(255,209,102,.22));
  border-color:rgba(233,91,131,.22);
  color:#42262f;
}
.sidebar-card{
  margin-top:28px;
  padding:18px;
  border:1px solid rgba(233,91,131,.18);
  border-radius:22px;
  background:linear-gradient(135deg,rgba(255,255,255,.85),rgba(255,241,243,.9));
  display:grid;
  gap:6px;
  box-shadow:0 12px 36px rgba(233,91,131,.10);
}
.sidebar-card span{color:var(--muted);font-size:14px}

.main{
  flex:1;
  padding:34px;
  max-width:1320px;
  margin:0 auto;
  width:100%;
  position:relative;
  z-index:1;
}
.topbar{
  display:flex;
  justify-content:space-between;
  gap:20px;
  align-items:center;
  margin-bottom:28px;
}
.eyebrow{
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:12px;
  font-weight:900;
  margin-bottom:8px;
}
.topbar h2{font-size:36px;color:#3a2630}
.controls{display:flex;gap:10px;align-items:center}
select,input{
  background:#fff;
  color:var(--text);
  border:1px solid var(--line);
  border-radius:15px;
  padding:12px 14px;
  outline:none;
  box-shadow:0 8px 22px rgba(206,102,128,.08);
}
input::placeholder{color:#b38a94}

button{
  border:0;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;
  padding:12px 16px;
  border-radius:15px;
  font-weight:900;
  cursor:pointer;
  box-shadow:0 12px 26px rgba(233,91,131,.18);
}
button.secondary{
  background:linear-gradient(135deg,#fff,#fff3f6);
  color:#b83c62;
  border:1px solid var(--line);
}
button.ghost{
  background:rgba(255,255,255,.7);
  color:#9a5b6d;
  border:1px solid var(--line);
  box-shadow:none;
}
button.success{background:linear-gradient(135deg,#32c784,#86efac);color:#07351d}
button.danger{background:linear-gradient(135deg,#ef4444,#fb7185);color:#fff}

.screen{display:none}
.screen.active{display:block}

.hero-card{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:22px;
  padding:30px;
  margin-bottom:18px;
  border-radius:32px;
  background:
    radial-gradient(circle at right,rgba(255,209,102,.35),transparent 34%),
    linear-gradient(135deg,#ffffff,#fff2f5);
  border:1px solid rgba(233,91,131,.18);
  box-shadow:var(--shadow);
}
.hero-card h3{font-size:30px;margin:7px 0 10px;color:#3a2630}
.hero-card p{color:#835b66;line-height:1.6;max-width:760px}
.hero-kicker{
  color:#d94b76;
  font-weight:900;
  letter-spacing:.12em;
}
.hero-symbol{
  font-size:96px;
  font-weight:900;
  color:#ef7b9f;
  line-height:1;
  filter:drop-shadow(0 12px 22px rgba(233,91,131,.18));
}

.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  margin-bottom:18px;
}
.stat,.panel{
  background:rgba(255,255,255,.78);
  border:1px solid rgba(233,91,131,.18);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.stat{padding:22px}
.stat span{color:var(--muted);font-weight:800;font-size:14px}
.stat strong{display:block;margin-top:12px;font-size:36px;color:#3a2630}
.panel{padding:24px}
.panel h3{font-size:22px;margin-bottom:14px;color:#3a2630}

.plan-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.plan-grid div{
  background:linear-gradient(135deg,#fff,#fff7f0);
  border:1px solid var(--line);
  border-radius:20px;
  padding:18px;
}
.plan-grid p{color:var(--muted);margin-top:8px;line-height:1.55}

.study-layout{display:grid;grid-template-columns:1fr 320px;gap:18px}
.card-area{display:grid;gap:16px}
.flashcard{
  min-height:380px;
  border:1px solid rgba(233,91,131,.24);
  border-radius:34px;
  background:
    radial-gradient(circle at top right,rgba(255,209,102,.35),transparent 34%),
    linear-gradient(180deg,#ffffff,#fff2f6);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:18px;
  text-align:center;
  padding:32px;
  box-shadow:var(--shadow);
  cursor:pointer;
}
.badge{
  align-self:flex-start;
  background:rgba(233,91,131,.10);
  border:1px solid rgba(233,91,131,.20);
  color:#d94b76;
  padding:8px 12px;
  border-radius:999px;
  font-weight:900;
}
.japanese{
  font-size:62px;
  font-weight:900;
  line-height:1.15;
  color:#34232b;
}
.reading{font-size:22px;color:var(--muted)}
.answer{
  display:block;
  white-space:pre-line;
  font-size:34px;
  font-weight:900;
  color:#d94b76;
  text-align:center;
  margin-top:12px;
  max-width:760px;
  line-height:1.35;
}
.hidden{display:none!important}
.actions{display:flex;flex-wrap:wrap;gap:10px}
.compact{height:max-content}

.quiz-head,.library-head,.section-head{
  display:flex;
  justify-content:space-between;
  gap:18px;
  align-items:center;
}
.quiz-head p{margin-top:8px;color:var(--muted)}
.choices{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
  margin-top:22px;
}
.choice{
  background:#fff;
  color:var(--text);
  border:1px solid var(--line);
  box-shadow:none;
  text-align:left;
  white-space:pre-line;
}
.choice:hover{border-color:var(--accent);background:#fff5f8}
.feedback{margin-top:16px;font-weight:900}

.word-list{display:grid;gap:10px;margin-top:18px}
.word-item{
  display:grid;
  grid-template-columns:80px 1fr 1.2fr 90px;
  gap:14px;
  align-items:start;
  padding:14px;
  border:1px solid var(--line);
  border-radius:18px;
  background:rgba(255,255,255,.72);
}
.word-item .lvl{color:#d94b76;font-weight:900}
.word-item .jp{font-size:22px;font-weight:900;color:#3a2630}
.word-item .rd{color:var(--muted);font-size:14px;margin-top:4px}
.word-item .meaning{white-space:pre-line;color:#6b4651}
.pill{background:#fff0f4;color:#b04766;border-radius:999px;padding:6px 10px;text-align:center;font-size:12px;font-weight:900}

/* Kana */
.kana-layout{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(340px,.75fr);
  gap:18px;
}
.kana-tabs,.kana-category-tabs,.test-controls{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.kana-tab,.kana-cat{
  background:#fff;
  color:#b83c62;
  border:1px solid var(--line);
  box-shadow:none;
}
.kana-tab.active,.kana-cat.active{
  background:linear-gradient(135deg,#ff8fb1,#ffd166);
  color:#fff;
}
.kana-category-tabs{margin:14px 0 18px}
.kana-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(98px,1fr));
  gap:12px;
}
.kana-card{
  min-height:104px;
  background:linear-gradient(180deg,#fff,#fff7f9);
  border:1px solid var(--line);
  border-radius:22px;
  color:var(--text);
  box-shadow:0 12px 28px rgba(233,91,131,.10);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.kana-card:hover{
  border-color:var(--accent);
  background:#fff1f5;
}
.kana-char{
  font-size:34px;
  font-weight:900;
  color:#3a2630;
}
.kana-romaji{
  font-weight:900;
  color:#d94b76;
}
.kana-meaning{
  font-size:12px;
  color:var(--muted);
  text-align:center;
}
.kana-test-panel .muted{line-height:1.55}
.test-controls{margin:16px 0}
.kana-question-card{
  margin-top:16px;
  border:1px solid var(--line);
  border-radius:28px;
  background:
    radial-gradient(circle at right,rgba(255,209,102,.34),transparent 40%),
    linear-gradient(180deg,#fff,#fff7f0);
  min-height:220px;
  display:grid;
  place-items:center;
  padding:24px;
  text-align:center;
}
.kana-question{
  font-size:86px;
  font-weight:900;
  color:#3a2630;
  line-height:1;
}
.kana-choices{grid-template-columns:repeat(2,1fr)}
.kana-choice{text-align:center;font-weight:900}

@media(max-width:980px){
  body{display:block}
  .mobile-menu-btn{display:grid;place-items:center}
  .sidebar{
    position:fixed;
    left:14px;
    top:14px;
    bottom:14px;
    width:min(84vw,330px);
    height:auto;
    border-radius:30px;
    transform:translateX(calc(-100% - 32px));
    transition:.24s ease;
    box-shadow:0 30px 80px rgba(83,37,48,.22);
  }
  .sidebar.open{transform:translateX(0)}
  .main{padding:82px 18px 24px}
  .topbar,.quiz-head,.library-head,.section-head{
    align-items:stretch;
    flex-direction:column;
  }
  .controls{flex-direction:column}
  .stats-grid,.plan-grid,.study-layout,.choices,.kana-layout{
    grid-template-columns:1fr;
  }
  .word-item{grid-template-columns:1fr}
  .japanese{font-size:46px}
  .hero-card{align-items:flex-start;flex-direction:column}
  .hero-symbol{font-size:70px}
  .kana-question{font-size:72px}
  .kana-grid{grid-template-columns:repeat(auto-fill,minmax(82px,1fr))}
}

@media(max-width:520px){
  .main{padding-left:14px;padding-right:14px}
  .panel,.hero-card{padding:18px;border-radius:22px}
  .topbar h2{font-size:30px}
  .stat strong{font-size:30px}
  .stats-grid{gap:10px}
  .flashcard{min-height:320px;padding:22px;border-radius:26px}
  .actions button{width:100%}
  .kana-grid{grid-template-columns:repeat(3,1fr)}
  .kana-card{min-height:92px;border-radius:18px}
  .kana-char{font-size:30px}
  .choices{grid-template-columns:1fr}
}


/* V2 Features */
.mini-stats{margin-top:-4px}.listening-card,.speaking-panel{text-align:center}.listening-card .japanese,.speaking-panel .japanese{margin:22px 0 8px}.listening-question{font-size:42px;font-weight:900;color:#3a2630}.kanji-layout,.waifu-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:18px}.kanji-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(112px,1fr));gap:12px;margin-top:18px}.kanji-card{min-height:128px;background:linear-gradient(180deg,#fff,#fff7f9);border:1px solid var(--line);border-radius:24px;color:var(--text);box-shadow:0 12px 28px rgba(233,91,131,.10);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px}.kanji-big{font-size:52px;font-weight:900;color:#3a2630}.kanji-card small{color:#d94b76;font-weight:900}.kanji-detail{text-align:center}.kanji-detail-symbol{font-size:112px;font-weight:900;line-height:1;color:#d94b76;margin-bottom:14px}.kanji-detail p{margin:8px 0;color:#6b4651}.kanji-words{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:16px 0}.kanji-words span{background:#fff0f4;color:#8e4058;border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-weight:800}.waifu-card{text-align:center;background:radial-gradient(circle at top,rgba(255,209,102,.38),transparent 42%),linear-gradient(180deg,#fff,#fff2f6)}.waifu-avatar{font-size:96px;line-height:1;margin-bottom:14px}.waifu-card p{font-size:18px;line-height:1.7;color:#6b4651;margin:12px 0 20px}.waifu-picks{display:grid;gap:10px}.waifu-note{margin-top:16px;line-height:1.6}.speaking-panel #speakingResult{line-height:1.7}
@media(max-width:980px){.kanji-layout,.waifu-layout{grid-template-columns:1fr}.kanji-detail-symbol{font-size:86px}.waifu-avatar{font-size:76px}}


/* Complete Kanji Academy */
.kanji-test-panel{margin-top:18px}.kanji-test-card{min-height:190px}.kanji-test-question{font-size:54px;font-weight:900;color:#3a2630;line-height:1.2;max-width:860px}.typing-row{display:flex;gap:10px;margin-top:16px}.typing-row input{flex:1}.center-actions{justify-content:center}.kanji-test-choices .choice{text-align:center;font-weight:900}.kanji-detail .muted{line-height:1.55}.kanji-card span:not(.kanji-big){font-size:13px;line-height:1.25;max-width:96px}.kanji-card{padding:10px}
@media(max-width:620px){.typing-row{flex-direction:column}.kanji-test-question{font-size:38px}.kanji-test-choices{grid-template-columns:1fr}.kanji-card span:not(.kanji-big){max-width:none}.kanji-grid{grid-template-columns:repeat(3,1fr)}}

.flash-options{
  display:grid;
  gap:12px;
  margin:14px 0 16px;
}
.flash-options label{
  display:grid;
  gap:7px;
  color:var(--muted);
  font-weight:900;
  font-size:14px;
}
.flash-options input,.flash-options select{
  width:100%;
}
.study-tips{
  display:grid;
  gap:8px;
  margin-top:16px;
  padding:14px;
  border:1px solid var(--line);
  border-radius:18px;
  background:linear-gradient(135deg,#fff,#fff7f0);
  color:var(--muted);
  line-height:1.45;
}
.study-tips b{color:var(--text)}
.study-tips span{font-size:14px}
.recall-row{
  grid-column:1/-1;
  display:grid;
  grid-template-columns:1fr auto auto;
  gap:10px;
  width:100%;
}
.recall-row input{width:100%}
@media (max-width: 720px){
  .recall-row{grid-template-columns:1fr}
}