:root{
  font-family:Pretendard,"Noto Sans KR",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:#111111;
  font-synthesis:none;
  --navy:#ffffff;
  --blue:#2e68bc;
  --blue-soft:#eaf2ff;
  --ink:#111111;
  --muted:#111111;
  --line:#cfd4dc;
  --surface:#ffffff;
  --surface-soft:#f7f9fc;
}
*{box-sizing:border-box}
html{min-height:100%;background:#ffffff}
body{margin:0;min-height:100vh;background:#ffffff;position:relative;isolation:isolate;font-size:16px;line-height:1.78;color:#111111}
body::before,body::after{content:"";position:fixed;inset:0;z-index:-2;background:#ffffff;transform:none}
body::after{z-index:-1}
button{font:inherit}
button:focus-visible{outline:3px solid rgba(46,104,188,.34);outline-offset:2px}
.app-shell{width:min(100%,620px);min-height:100vh;margin:0 auto;padding:18px 14px 32px}
.glass{border:1px solid var(--line);background:#ffffff;box-shadow:0 4px 16px rgba(0,0,0,.06);-webkit-backdrop-filter:none;backdrop-filter:none}
.nexus-link{display:inline-flex;align-items:center;justify-content:center;min-height:42px;margin:0 0 12px;padding:0 14px;border:1px solid var(--line);border-radius:10px;background:#ffffff;color:#111111;font-size:14px;font-weight:800;letter-spacing:.03em;line-height:1;text-decoration:none;text-shadow:none}
.nexus-link:hover{background:#f7f9fc;border-color:#aeb8c5;color:#111111}
.nexus-link:focus-visible{outline:2px solid rgba(46,104,188,.45);outline-offset:3px}
.hero{border-radius:28px;padding:20px}
.brand-row{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}
.eyebrow{margin:0 0 6px;font-size:13px;font-weight:900;letter-spacing:.12em;color:var(--blue)}
h1{margin:0;font-size:clamp(1.9rem,7vw,2.55rem);line-height:1.02;letter-spacing:-.055em;color:#111111}
h1 span{color:#111111}
.icon-button{width:40px;height:40px;border:1px solid var(--line);border-radius:13px;background:#ffffff;color:#111111;font-size:1.4rem;cursor:pointer}
.day-dashboard{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.day-copy{display:grid;gap:2px;min-width:0}
.day-copy>span{font-weight:900;color:#111111;font-size:13px;letter-spacing:.06em}
.day-copy strong{font-size:1.2rem;letter-spacing:-.025em;line-height:1.4;color:#111111}
.day-copy small{color:#111111;line-height:1.55;font-size:13px}
.progress-ring{width:78px;height:78px;border-radius:50%;display:grid;place-content:center;text-align:center;background:conic-gradient(var(--blue) var(--progress,1%),#e5ecf5 0);position:relative;flex:0 0 auto}
.progress-ring::before{content:"";position:absolute;inset:7px;background:#ffffff;border-radius:50%}
.progress-ring span,.progress-ring small{position:relative;z-index:1}
.progress-ring span{font-size:1.5rem;font-weight:900;line-height:1;color:#111111}
.progress-ring small{font-size:12px;color:#111111}
.day-progress{margin-top:16px}
.day-progress>div:first-child{display:flex;justify-content:space-between;color:#111111;font-size:13px}
.day-progress strong{color:#111111}
.progress-track{height:8px;margin-top:7px;overflow:hidden;border-radius:999px;background:#e5e7eb}
.progress-track span{display:block;height:100%;width:0;border-radius:inherit;background:#2e68bc;transition:width .25s ease}
.category-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;margin:10px 0;padding:5px;border-radius:20px;overflow:hidden}
.category{min-width:0;border:0;border-radius:12px;padding:8px 2px 7px;color:#111111;background:#ffffff;cursor:pointer;font-size:12.5px;font-weight:800;white-space:nowrap}
.category span{display:grid;place-items:center;width:29px;height:29px;margin:0 auto 4px;border-radius:8px;background:#eaf2ff;color:#2e68bc;font-size:14px}
.category.active{color:#111111;background:#f7f9fc}
.category.active span{background:#2e68bc;color:#ffffff}
.learning-card{min-height:0;padding:22px 20px 24px;border-radius:28px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.badge,.part-badge{display:inline-flex;align-items:center;min-height:30px;border-radius:999px;padding:0 11px;font-size:13px;font-weight:900;color:#111111;background:#eef4f8}
.word-title{margin:28px 0 5px;color:#111111;font-family:Georgia,"Times New Roman",serif;font-size:clamp(2.25rem,11vw,3.25rem);letter-spacing:-.035em;word-break:break-word}
.word-pos{display:inline-block;margin-bottom:12px;color:#111111;font-size:14px}
.meaning{margin:0 0 20px;color:#111111;font-size:1.18rem;font-weight:850;line-height:1.55}
.section-label{margin:22px 0 7px;color:#2e68bc;font-size:13px;font-weight:900;letter-spacing:.08em}
.example-box,.tip-box,.chunk-box,.rule-box,.explanation-box{border:1px solid var(--line);border-radius:14px;padding:13px 14px;background:#ffffff;color:#111111}
.example-en{margin:0;color:#111111;font-family:Georgia,"Times New Roman",serif;font-size:1.02rem;line-height:1.7}
.example-ko{margin:8px 0 0;color:#111111;font-size:14.5px;line-height:1.62}
.tip-box{margin-top:12px;line-height:1.65;font-size:14.5px}
.sentence-title{margin:28px 0 10px;color:#111111;font-size:1rem}
.sentence-main{margin:0;color:#111111;font-family:Georgia,"Times New Roman",serif;font-size:clamp(1.42rem,6.5vw,2rem);line-height:1.55}
.chunk-box{margin-top:14px;line-height:1.65}
.grammar-title{margin:28px 0 10px;font-size:clamp(1.5rem,6vw,2rem);color:#111111;letter-spacing:-.035em}
.rule-box{font-weight:750;line-height:1.65}
.trap{margin-top:12px;border:1px solid var(--line);border-left:4px solid #2e68bc;padding:12px 14px;background:#ffffff;border-radius:0 14px 14px 0;color:#111111;line-height:1.65}
.quiz-area{margin-top:24px}
.question{margin:24px 0 15px;color:#111111;font-family:Georgia,"Times New Roman",serif;font-size:1.08rem;line-height:1.75;white-space:pre-line}
.quiz-options{display:grid;gap:8px}
.quiz-option{width:100%;border:1px solid var(--line);border-radius:13px;padding:12px 13px;text-align:left;background:#ffffff;color:#111111;cursor:pointer;font-size:15px;line-height:1.55}
.quiz-option.correct,.quiz-option.wrong{border-color:#b8c6d3;background:#f7f9fc;color:#111111}
.quiz-result{min-height:24px;margin:12px 2px 0;font-weight:800;color:#111111}
.explanation-box{margin-top:10px;font-size:14.5px;line-height:1.7}
.learning-actions{display:grid;grid-template-columns:.9fr 1.35fr;gap:9px;margin:12px 0}
.primary-button,.secondary-button{border-radius:17px;padding:15px 12px;font-size:15px;font-weight:850;cursor:pointer}
.primary-button{border:0;color:#ffffff;background:#2e68bc;box-shadow:0 4px 16px rgba(0,0,0,.06)}
.primary-button.completed{background:#326da8}
.secondary-button{border:1px solid var(--line);color:#111111;background:#ffffff}
.secondary-button[hidden]{display:none}
.navigation-row{display:grid;grid-template-columns:46px 1fr 46px;align-items:center;gap:9px;padding:10px;border-radius:20px;text-align:center}
.navigation-row button{width:42px;height:42px;border:1px solid var(--line);border-radius:13px;background:#ffffff;color:#111111;font-size:1.6rem;cursor:pointer}
.navigation-row button:disabled{opacity:.3;cursor:default}
.navigation-row div{display:grid;gap:1px}
.navigation-row strong{color:#111111;font-size:15px}
.navigation-row small{color:#111111;font-size:13px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:12px;padding:14px 10px;border-radius:20px}
.stats div{display:grid;gap:4px;text-align:center}
.stats div+div{border-left:1px solid var(--line)}
.stats span{color:#111111;font-size:13px}
.stats strong{color:#111111;font-size:1.2rem}
.footer-actions{display:flex;justify-content:center;gap:20px;margin:14px 0}
.text-button{padding:5px;border:0;background:#ffffff;color:#2e68bc;text-decoration:underline;cursor:pointer;font-size:14px}
.footer-context{margin:12px 4px 0;color:#111111;font-size:13.5px;line-height:1.72;text-align:center}
.footer-context p{margin:4px 0}
.site-footer{margin-top:8px;padding:16px 10px 28px;border:0;border-top:1px solid var(--line);border-radius:0;background:#ffffff;color:#111111;box-shadow:none;text-align:center}
.site-footer .footer-brand strong{display:block;color:#111111;font-size:15px;font-weight:650;line-height:1.5}
.site-footer .footer-brand p{margin:3px auto 0;color:#111111;font-size:13.5px;line-height:1.72}
.site-footer>.footer-meta{display:flex;flex-direction:column;align-items:center;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.footer-meta p{margin:0 auto;color:#111111;font-size:14px;line-height:1.75}
.footer-meta .ai-disclosure{margin-top:6px;max-width:560px;font-size:13.5px}
.footer-meta a{display:inline-block;margin-top:6px;color:#2e68bc;font-size:13.5px;font-weight:650;text-decoration:none}
.toast{position:fixed;left:50%;bottom:max(25px,env(safe-area-inset-bottom));z-index:10;transform:translate(-50%,20px);opacity:0;pointer-events:none;padding:11px 16px;border-radius:999px;background:#ffffff;color:#111111;font-size:14px;box-shadow:0 4px 16px rgba(0,0,0,.06);transition:.22s ease}
.toast.show{transform:translate(-50%,0);opacity:1}
@media(max-width:460px){
  body{font-size:16px;line-height:1.8}
  .app-shell{padding-left:10px;padding-right:10px}
  .hero,.learning-card{border-radius:24px}
  .category-tabs{gap:3px;padding:4px}
  .category{padding:7px 1px 6px;font-size:12.5px}
  .category span{width:28px;height:28px;margin-bottom:3px}
  .learning-card{min-height:0;padding:17px}
  .day-copy strong{font-size:1.1rem}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}