/* =========================================================================
   HSK1 SMART LEARN — styles.css
   Giữ tông màu đỏ san hô (coral) đồng bộ với giáo trình gốc, nhưng tổ
   chức lại thành giao diện app hiện đại, thân thiện học sinh Việt Nam.
   ========================================================================= */
:root{
  /* Ánh xạ sang Design System v3 chung của hệ thống (tokens.css) —
     KHÔNG định nghĩa màu mới, chỉ đổi tên biến để phần CSS còn lại của
     module này (vốn viết theo --coral/--ink/--paper...) tự động đồng bộ
     theme + dark mode với toàn site mà không phải sửa từng dòng. */
  --coral:var(--color-primary); --coral-dark:var(--color-primary-hover); --coral-light:var(--color-primary-soft); --pink-bg:var(--color-bg);
  --ink:var(--color-text); --ink-soft:var(--color-text-muted); --paper:var(--color-surface); --line:var(--color-border);
  --green:var(--color-success); --green-bg:var(--color-success-bg); --red:var(--color-error); --red-bg:var(--color-error-bg);
  --gold:var(--color-accent); --blue:var(--color-secondary); --blue-bg:var(--color-secondary-soft);
  --radius:var(--radius-lg); --radius-sm:var(--radius-sm);
  --shadow:var(--shadow-2);
  --shadow-lift:var(--shadow-3);
  --ease:var(--ease-standard);
  font-family:var(--font-family-base);
}
.zh, [class*="-zh"]{ font-family:'Noto Sans SC','PingFang SC',sans-serif; }
h1,h2,h3,.hsk-brand,.hsk-topbar-title{ font-family:var(--font-family-display); }
*{box-sizing:border-box;}
html,body{margin:0;padding:0;background:var(--pink-bg);color:var(--ink);}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}

/* Module này chạy LỒNG BÊN TRONG trang hệ thống (có #site-header/#site-footer
   riêng ở trên/dưới) — không chiếm 100vh toàn màn hình như bản gốc độc lập,
   để header/footer chung của site luôn hiển thị. */
#hsk-app{display:flex;min-height:calc(100vh - var(--header-height) - 40px);background:var(--pink-bg);}
#hsk-sidenav{
  width:230px;flex-shrink:0;background:var(--gradient-hero);
  color:var(--color-text-on-primary);padding:18px 0;position:sticky;top:var(--header-height);align-self:flex-start;
  height:calc(100vh - var(--header-height));overflow-y:auto;border-radius:0 var(--radius-lg) var(--radius-lg) 0;
}
.hsk-brand{display:flex;gap:10px;align-items:center;padding:6px 20px 20px;font-weight:700;font-size:17px;border-bottom:1px solid rgba(255,255,255,.18);margin-bottom:10px;}
.hsk-nav-item{display:flex;align-items:center;gap:10px;padding:11px 20px;color:rgba(255,255,255,.85);font-size:14.5px;border-left:3px solid transparent;}
.hsk-nav-item:hover{background:rgba(255,255,255,.08);}
.hsk-nav-item.active{background:rgba(255,255,255,.16);border-left-color:var(--color-accent);color:var(--color-text-on-primary);font-weight:600;}
.hsk-nav-icon{font-size:18px;width:22px;text-align:center;}

#hsk-topbar{display:none;}
@media (max-width: 860px){
  #hsk-topbar{
    display:flex;flex-direction:column;position:sticky;top:var(--header-height);z-index:40;
    background:var(--gradient-primary);color:var(--color-text-on-primary);padding:12px 18px 14px;
    box-shadow:0 2px 10px rgba(199,63,53,.25);
  }
  .hsk-topbar-brand{font-size:11.5px;opacity:.85;font-weight:600;letter-spacing:.03em;}
  .hsk-topbar-title{font-size:17px;font-weight:800;margin-top:1px;}
}

/* Hiệu ứng chuyển trang mượt mỗi lần đổi route */
#hsk-app-root{opacity:0;transform:translateY(8px);}
#hsk-app-root.hsk-route-enter{animation:hskRouteIn .32s var(--ease) forwards;}
@keyframes hskRouteIn{ to{opacity:1;transform:translateY(0);} }

.hsk-sidenav-footer{margin-top:auto;padding:14px 20px;font-size:10.5px;opacity:.55;line-height:1.5;}
#hsk-sidenav{display:flex;flex-direction:column;}

/* ---- Progress ring (SVG) ---- */
.hsk-ring{display:block;}
.hsk-ring-fill{transition:stroke-dashoffset .6s var(--ease);}
.hsk-ring-label{font-size:17px;font-weight:800;fill:var(--coral-dark);font-family:'Be Vietnam Pro',sans-serif;}
.hsk-ring-row{display:flex;align-items:center;gap:16px;}

/* ---- Weekly bar chart ---- */
.hsk-bar-chart{display:flex;justify-content:space-between;align-items:flex-end;gap:6px;height:110px;margin:10px 0 4px;}
.hsk-bar-col{flex:1;display:flex;flex-direction:column;align-items:center;height:100%;justify-content:flex-end;}
.hsk-bar-track{width:100%;max-width:26px;height:74px;background:var(--coral-light);border-radius:8px;display:flex;align-items:flex-end;overflow:hidden;}
.hsk-bar-fill{width:100%;background:var(--gradient-accent);border-radius:8px 8px 0 0;transition:height .5s var(--ease);}
.hsk-bar-val{font-size:10.5px;font-weight:800;color:var(--coral-dark);margin-top:4px;height:13px;}
.hsk-bar-label{font-size:10px;color:var(--ink-soft);margin-top:1px;}

#hsk-main{flex:1;min-width:0;padding-bottom:70px;}
#hsk-bottomnav{
  display:none;position:fixed;bottom:0;left:0;right:0;background:var(--paper);
  border-top:1px solid var(--line);z-index:50;box-shadow:0 -2px 10px rgba(0,0,0,.06);
}
#hsk-bottomnav .hsk-nav-item{flex-direction:column;gap:2px;flex:1;padding:8px 0;color:var(--ink-soft);font-size:11px;border-left:none;border-top:3px solid transparent;align-items:center;text-align:center;}
#hsk-bottomnav .hsk-nav-item.active{color:var(--coral-dark);border-top-color:var(--coral);background:none;font-weight:700;}
#hsk-bottomnav .hsk-nav-icon{font-size:19px;}

.hsk-page{max-width:900px;margin:0 auto;padding:26px 22px 50px;}
.hsk-page-title{font-size:22px;margin:0 0 6px;}
.hsk-page-sub{color:var(--ink-soft);font-size:14px;margin:0 0 20px;}
.hsk-back-link{display:inline-block;margin-bottom:12px;color:var(--coral-dark);font-weight:600;font-size:14px;}

/* ---------------- Cards / stats / progress ---------------- */
.hsk-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:18px;box-shadow:var(--shadow);}
.hsk-card-title{font-weight:700;font-size:15px;margin-bottom:12px;color:var(--coral-dark);}
.hsk-stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px 0;}
.hsk-stat{background:var(--coral-light);border-radius:10px;padding:12px 8px;text-align:center;}
.hsk-stat-num{font-size:19px;font-weight:800;color:var(--coral-dark);}
.hsk-stat-label{font-size:11.5px;color:var(--ink-soft);margin-top:2px;}

.hsk-progress{position:relative;background:var(--color-surface-alt);border-radius:20px;height:20px;overflow:hidden;margin:8px 0;}
.hsk-progress-fill{background:var(--gradient-accent);height:100%;border-radius:20px;transition:width .4s;}
.hsk-progress-label{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:var(--color-text-on-primary);text-shadow:0 1px 2px rgba(0,0,0,.25);}
.hsk-progress-sm{height:8px;}
.hsk-progress-sm .hsk-progress-label{display:none;}
.hsk-progress-lg{height:26px;}

/* ---------------- Buttons ---------------- */
.hsk-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:30px;border:none;font-size:14px;font-weight:700;cursor:pointer;margin:4px 6px 4px 0;}
.hsk-btn-primary{background:var(--coral);color:var(--color-text-on-primary);}
.hsk-btn-primary:hover{background:var(--coral-dark);}
.hsk-btn-lg{padding:13px 26px;font-size:15.5px;width:100%;justify-content:center;}
.hsk-btn-outline{background:var(--paper);border:1.5px solid var(--coral);color:var(--coral-dark);}
.hsk-btn-ghost{background:transparent;border:1.5px dashed var(--line);color:var(--ink-soft);}
.hsk-btn-success{background:var(--green);color:var(--color-text-on-primary);}
.hsk-btn-danger{background:var(--red);color:var(--color-text-on-primary);}
.hsk-btn-danger-outline{background:var(--paper);border:1.5px solid var(--red);color:var(--red);}
.hsk-btn:disabled{opacity:.5;cursor:not-allowed;}
.hsk-link{color:var(--coral-dark);font-weight:700;font-size:13.5px;}

/* ---------------- Dashboard ---------------- */
.hsk-hello-card{display:flex;justify-content:space-between;align-items:center;background:var(--gradient-primary);color:var(--color-text-on-primary);border-radius:var(--radius);padding:20px 22px;margin-bottom:16px;}
.hsk-hello-title{font-size:19px;font-weight:800;}
.hsk-hello-sub{font-size:13.5px;opacity:.92;margin-top:2px;}
.hsk-streak-chip{background:rgba(255,255,255,.22);padding:8px 14px;border-radius:20px;font-weight:800;font-size:14px;}
.hsk-continue-card{background:var(--paper);border:2px solid var(--coral);border-radius:var(--radius);padding:20px;margin-bottom:18px;}
.hsk-continue-label{font-size:11.5px;font-weight:800;color:var(--coral-dark);letter-spacing:.06em;}
.hsk-continue-lesson{font-size:18px;font-weight:800;margin:4px 0;}
.hsk-continue-section{font-size:13.5px;color:var(--ink-soft);margin-bottom:8px;}
.hsk-checklist-plain{list-style:none;padding:0;margin:0 0 14px;font-size:14.5px;}
.hsk-checklist-plain li{padding:5px 0;}
.hsk-badge-row{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0;}
.hsk-badge-pill{background:var(--coral-light);color:var(--coral-dark);border-radius:20px;padding:6px 12px;font-size:12.5px;font-weight:700;}
.hsk-empty-note{background:var(--coral-light);border-radius:10px;padding:16px;color:var(--ink-soft);font-size:14px;text-align:center;}

/* ---------------- Lesson path ---------------- */
.hsk-path-list{display:flex;flex-direction:column;}
.hsk-search-input{width:100%;padding:12px 16px;border-radius:30px;border:1.5px solid var(--line);font-size:14px;margin-bottom:16px;background:var(--paper);box-shadow:var(--shadow);}
.hsk-search-input:focus{border-color:var(--coral);}
.hsk-path-item{display:flex;align-items:center;gap:14px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin-bottom:4px;box-shadow:var(--shadow);}
.hsk-path-num{width:34px;height:34px;border-radius:50%;background:var(--coral-light);color:var(--coral-dark);font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.hsk-path-num.done{background:var(--green);color:var(--color-text-on-primary);}
.hsk-path-info{flex:1;min-width:0;}
.hsk-path-title{font-weight:700;font-size:15px;}
.hsk-path-sub{color:var(--ink-soft);font-size:12.5px;margin:2px 0 4px;}
.hsk-path-meta{font-weight:800;color:var(--coral-dark);font-size:13px;}
.hsk-path-connector{width:2px;height:12px;background:var(--line);margin-left:33px;}

/* ---------------- Lesson detail / tabs ---------------- */
.hsk-lesson-header h1{font-size:20px;margin:8px 0 2px;}
.hsk-lesson-sub{color:var(--ink-soft);font-size:13.5px;margin-bottom:10px;}
.hsk-tabbar{display:flex;overflow-x:auto;gap:6px;padding:6px 0 14px;-webkit-overflow-scrolling:touch;}
.hsk-tab{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:2px;background:var(--paper);border:1.5px solid var(--line);border-radius:12px;padding:8px 12px;font-size:11px;color:var(--ink-soft);position:relative;cursor:pointer;min-width:64px;}
.hsk-tab.active{border-color:var(--coral);color:var(--coral-dark);background:var(--coral-light);font-weight:700;}
.hsk-tab.tab-done .hsk-tab-check{position:absolute;top:2px;right:4px;color:var(--green);font-size:11px;}
.hsk-tab-num{font-size:10px;opacity:.6;}
.hsk-tab-icon{font-size:17px;}
.hsk-tab-content{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);}
.hsk-tab-content h3{margin-top:0;}
.hsk-mark-btn{margin-top:16px;}
.hsk-obj-list{padding-left:20px;font-size:14.5px;}
.hsk-warmup-text{font-size:14.5px;background:var(--coral-light);padding:12px 16px;border-radius:10px;}

.hsk-text-block{border-bottom:1px dashed var(--line);padding-bottom:16px;margin-bottom:16px;}
.hsk-text-block:last-of-type{border-bottom:none;}
.hsk-text-heading{font-weight:800;color:var(--coral-dark);margin-bottom:6px;}
.hsk-track-tag{background:var(--gold);color:var(--color-text-on-primary);font-size:11px;padding:2px 8px;border-radius:20px;margin-left:6px;}
.hsk-text-meta{font-size:13px;color:var(--ink-soft);background:var(--coral-light);padding:8px 12px;border-radius:8px;margin-bottom:10px;}
.hsk-listen-note{font-size:13px;background:var(--blue-bg);padding:8px 12px;border-radius:8px;margin-bottom:10px;}
.hsk-tip{background:var(--color-warning-bg);border:1px dashed var(--color-warning);border-radius:10px;padding:9px 13px;font-size:13px;margin:8px 0;color:var(--color-warning);}
.hsk-turn{display:flex;gap:10px;margin-bottom:10px;}
.hsk-turn-speaker{width:80px;flex-shrink:0;font-size:12px;color:var(--ink-soft);padding-top:2px;}
.hsk-turn-zh{font-size:18px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.hsk-turn-py{font-size:12px;color:var(--ink-soft);}
.hsk-turn-vi{font-size:13.5px;color:var(--green);margin-top:2px;}
.hsk-proper{font-size:12.5px;color:var(--ink-soft);margin-top:6px;}
.hsk-note-box{background:var(--coral-light);border-left:4px solid var(--coral);border-radius:0 8px 8px 0;padding:9px 13px;font-size:13px;color:var(--ink-soft);margin-top:8px;}
.hsk-note-inline{font-size:13.5px;color:var(--ink-soft);background:var(--coral-light);padding:10px 14px;border-radius:10px;}
.hsk-twister-block .hsk-twister-zh{font-size:18px;line-height:1.8;display:flex;align-items:center;gap:10px;}

.hsk-audio-btn{background:var(--blue-bg);color:var(--blue);border:none;border-radius:20px;padding:4px 10px;font-size:12px;cursor:pointer;display:inline-flex;align-items:center;gap:4px;}
.hsk-track-label{opacity:.75;font-size:10.5px;}

/* ---------------- Vocab table & flashcards ---------------- */
.hsk-vocab-actions{margin-bottom:12px;}
.hsk-vocab-table{width:100%;border-collapse:collapse;font-size:13.5px;}
.hsk-vocab-table th{text-align:left;font-size:11.5px;color:var(--ink-soft);border-bottom:2px solid var(--line);padding:6px 6px;}
.hsk-vocab-table td{padding:7px 6px;border-bottom:1px solid var(--line);vertical-align:middle;}
.hsk-v-zh{font-size:17px;white-space:nowrap;}
.hsk-v-stat{font-size:11px;color:var(--ink-soft);}

.hsk-flashcards{max-width:480px;}
.hsk-flash-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;}
.hsk-flash-count{font-weight:700;color:var(--coral-dark);}
.hsk-flashcard{background:var(--paper);border:2px solid var(--coral);border-radius:20px;padding:36px 20px;text-align:center;box-shadow:var(--shadow);}
.hsk-flash-word{font-size:52px;font-weight:800;}
.hsk-flash-py{font-size:16px;color:var(--ink-soft);margin-top:6px;}
.hsk-flash-pos{font-size:12px;color:var(--gold);margin-top:4px;}
.hsk-flash-vi{font-size:18px;color:var(--green);margin-top:14px;font-weight:700;}
.hsk-flash-stat{font-size:11px;color:var(--ink-soft);margin-top:10px;}
.hsk-flash-toolbar{display:flex;justify-content:center;gap:8px;margin:14px 0;flex-wrap:wrap;}
.hsk-icon-btn{background:var(--paper);border:1.5px solid var(--line);border-radius:20px;padding:6px 12px;font-size:12.5px;cursor:pointer;}
.hsk-icon-btn.active{border-color:var(--gold);color:var(--gold);background:var(--color-warning-bg);}
.hsk-flash-nav{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:14px;}
.hsk-flash-done{text-align:center;}

/* ---------------- Hanzi practice ---------------- */
.hsk-hanzi-picker{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.hsk-hanzi-chip{font-size:20px;background:var(--paper);border:1.5px solid var(--line);border-radius:10px;padding:6px 10px;cursor:pointer;}
.hsk-hanzi-chip:hover{border-color:var(--coral);}
.hsk-hanzi-practice{text-align:center;}
.hsk-hanzi-word-label{font-size:15px;color:var(--ink-soft);margin-bottom:10px;font-weight:600;}
.hsk-hanzi-writer-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;min-height:130px;}
.hsk-hanzi-writer-box{background:var(--paper);border:2px dashed var(--coral);border-radius:14px;width:130px;height:130px;}
.hsk-hanzi-missing{width:130px;height:130px;display:flex;align-items:center;justify-content:center;font-size:56px;color:var(--color-primary-soft);background:var(--paper);border:2px dashed var(--line);border-radius:14px;}
.hsk-hanzi-toolbar{margin-top:14px;display:flex;gap:8px;justify-content:center;}
.hsk-hanzi-count{font-size:12px;color:var(--ink-soft);margin-top:8px;}

/* ---------------- Grammar ---------------- */
.hsk-gpoint{border-bottom:1px dashed var(--line);padding-bottom:16px;margin-bottom:16px;}
.hsk-gpoint:last-of-type{border-bottom:none;}
.hsk-gpoint-head{font-weight:700;margin-bottom:6px;}
.hsk-gpoint-idx{background:var(--coral);color:var(--color-text-on-primary);border-radius:50%;width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;margin-right:6px;}
.hsk-gpoint-en{color:var(--ink-soft);font-weight:400;font-size:12.5px;font-style:italic;}
.hsk-gpoint-explain{background:var(--coral-light);border-radius:8px;padding:9px 13px;font-size:13.5px;margin:6px 0;}
.hsk-gpoint-examples{padding-left:20px;font-size:14px;margin:8px 0;}
.hsk-mini-table{width:100%;border-collapse:collapse;font-size:12.5px;margin:8px 0;}
.hsk-mini-table th,.hsk-mini-table td{border:1px solid var(--line);padding:6px;text-align:left;}
.hsk-mini-table th{background:var(--coral-light);color:var(--coral-dark);}
.hsk-nested-ex{font-size:13.5px;background:var(--blue-bg);padding:8px 12px;border-radius:8px;margin:8px 0;}
.hsk-gq-mount{margin-top:8px;}

/* ---------------- Listening / speaking ---------------- */
.hsk-listen-list{display:flex;flex-direction:column;gap:8px;margin-bottom:14px;}
.hsk-listen-item{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:10px 14px;}
.hsk-listen-item details{margin-top:6px;font-size:13.5px;}
.hsk-listen-item summary{cursor:pointer;color:var(--coral-dark);font-size:12.5px;}
.hsk-speak-item{border-bottom:1px dashed var(--line);padding:12px 0;}
.hsk-speak-controls{display:flex;align-items:center;gap:10px;margin-top:6px;}
.hsk-rec-audio{height:32px;}

/* ---------------- Exercises ---------------- */
.hsk-ex-item{border-bottom:1px dashed var(--line);padding-bottom:14px;margin-bottom:14px;}
.hsk-ex-heading{font-weight:700;color:var(--coral-dark);margin-bottom:6px;}
.hsk-word-bank{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px;}
.hsk-word-bank span{background:var(--coral-light);border-radius:6px;padding:3px 10px;font-size:13.5px;}
.hsk-ex-line{font-size:14.5px;margin-bottom:4px;}
.hsk-ex-answer summary{cursor:pointer;color:var(--coral-dark);font-size:12.5px;margin-top:6px;}
.hsk-answer-box{background:var(--green-bg);border:1px solid var(--color-success);border-radius:6px;padding:8px 12px;font-size:13.5px;color:var(--green);margin:8px 0;}
.hsk-self-check{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13.5px;}
.hsk-blank-select{font-size:14px;font-family:inherit;border:1.5px solid var(--line);border-radius:6px;padding:3px 6px;background:var(--paper);color:var(--ink);margin:0 2px;}
.hsk-blank-select.is-correct{border-color:var(--green);background:var(--green-bg);}
.hsk-blank-select.is-wrong{border-color:var(--red);background:var(--red-bg);}
.hsk-ex-item-feedback{font-size:13px;margin-top:6px;font-weight:600;}
.hsk-ex-item-feedback.ok{color:var(--green);}
.hsk-ex-item-feedback.warn{color:var(--red);}
.hsk-ex-overall-feedback{margin-top:12px;padding:10px 14px;border-radius:10px;font-weight:700;font-size:14px;}
.hsk-ex-overall-feedback.tier-great{background:var(--green-bg);color:var(--green);}
.hsk-ex-overall-feedback.tier-good{background:var(--color-secondary-soft);color:var(--color-secondary);}
.hsk-ex-overall-feedback.tier-ok{background:var(--color-warning-bg);color:var(--color-warning);}
.hsk-ex-overall-feedback.tier-weak{background:var(--red-bg);color:var(--red);}
.hsk-activity-box{background:var(--color-warning-bg);border:1px solid var(--color-warning);border-radius:10px;padding:14px 16px;font-size:14px;}

/* ---------------- Quiz runner ---------------- */
.hsk-quiz{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);}
.hsk-quiz-progress{font-size:12px;color:var(--ink-soft);margin-bottom:10px;font-weight:700;}
.hsk-quiz-prompt{text-align:center;margin-bottom:8px;}
.hsk-quiz-zh{font-size:30px;font-weight:800;}
.hsk-quiz-py{font-size:13px;color:var(--ink-soft);}
.hsk-quiz-question{text-align:center;font-size:15px;font-weight:600;margin:10px 0 14px;}
.hsk-quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.hsk-quiz-option{padding:12px;border-radius:12px;border:1.5px solid var(--line);background:var(--paper);font-size:14px;cursor:pointer;text-align:center;}
.hsk-quiz-option:hover{border-color:var(--coral);}
.hsk-quiz-option.correct{border-color:var(--green);background:var(--green-bg);color:var(--green);font-weight:700;}
.hsk-quiz-option.wrong{border-color:var(--red);background:var(--red-bg);color:var(--red);}
.hsk-quiz-feedback{margin-top:14px;padding:10px 14px;border-radius:10px;font-weight:700;font-size:14px;}
.hsk-quiz-feedback.ok{background:var(--green-bg);color:var(--green);}
.hsk-quiz-feedback.bad{background:var(--red-bg);color:var(--red);}
.hsk-quiz-feedback.hint{background:var(--color-warning-bg);color:var(--color-warning);}
.hsk-quiz-kbd-hint{text-align:center;font-size:11px;color:var(--ink-soft);margin-top:10px;opacity:.75;}
.hsk-quiz-actions{display:flex;justify-content:space-between;margin-top:16px;}
.hsk-quiz-result{text-align:center;}
.hsk-result-emoji{font-size:48px;}
.hsk-result-score{font-size:22px;font-weight:800;margin:8px 0;}
.hsk-result-msg{color:var(--ink-soft);margin-bottom:14px;}

/* ---------------- Games ---------------- */
.hsk-game-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0;}
.hsk-game-grid-lg{grid-template-columns:repeat(3,1fr);}
.hsk-game-card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center;font-size:13px;font-weight:700;box-shadow:var(--shadow);}
.hsk-game-card-lg{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);}
.hsk-game-icon{font-size:30px;margin-bottom:8px;}
.hsk-game-title{font-weight:800;font-size:14.5px;margin-bottom:4px;}
.hsk-game-desc{font-size:12px;color:var(--ink-soft);}
.hsk-lesson-picker{margin-bottom:6px;font-size:13.5px;}
.hsk-lesson-picker select{padding:6px 10px;border-radius:8px;border:1px solid var(--line);margin-left:6px;}
.hsk-pinyin-draw-card{background:var(--gradient-primary);color:var(--color-text-on-primary);border-radius:var(--radius);padding:18px;text-align:center;margin-bottom:18px;}
.hsk-pinyin-draw-result{font-size:30px;font-weight:800;margin:8px 0;}
.hsk-pinyin-draw-sub{font-size:13px;opacity:.9;margin-bottom:10px;}
.hsk-sentence-game{text-align:center;}
.hsk-sentence-hint{font-size:13.5px;color:var(--ink-soft);margin-bottom:10px;}
.hsk-sentence-slot{min-height:52px;background:var(--coral-light);border-radius:10px;padding:8px;margin-bottom:14px;display:flex;gap:6px;flex-wrap:wrap;justify-content:center;align-items:center;}
.hsk-slot-empty{font-size:13px;color:var(--ink-soft);}
.hsk-sentence-bank{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:14px;}
.hsk-tile{font-size:22px;padding:8px 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--paper);cursor:pointer;}
.hsk-tile.placed{background:var(--coral);color:var(--color-text-on-primary);border-color:var(--coral);cursor:default;}
.hsk-tile.used{opacity:.3;}
.hsk-sentence-feedback{margin-top:12px;padding:10px;border-radius:10px;font-weight:700;display:none;}

/* ---------------- Progress / mistakes / achievements ---------------- */
.hsk-progress-table{width:100%;border-collapse:collapse;font-size:13px;}
.hsk-progress-table td{padding:8px 4px;border-bottom:1px solid var(--line);vertical-align:middle;}
.hsk-mistake-list{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.hsk-mistake-item{background:var(--paper);border:1px solid var(--red);border-radius:10px;padding:10px 14px;}
.hsk-mistake-label{font-weight:700;}
.hsk-mistake-meta{font-size:12px;color:var(--ink-soft);}
.hsk-achv-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;}
.hsk-achv-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-align:center;box-shadow:var(--shadow);}
.hsk-achv-card.locked{opacity:.68;}
.hsk-achv-icon{font-size:32px;margin-bottom:6px;}
.hsk-achv-label{font-size:12.5px;font-weight:700;}
.hsk-achv-progress{margin-top:8px;font-size:10.5px;color:var(--ink-soft);}
.hsk-achv-progress .hsk-progress-sm{margin:4px 0 2px;}

/* ---------------- Toast / modal ---------------- */
#hsk-toast-host{position:fixed;top:14px;left:50%;transform:translateX(-50%);z-index:200;display:flex;flex-direction:column;gap:8px;align-items:center;}
.hsk-toast{background:rgba(20,17,26,.94);color:#fff;padding:10px 18px;border-radius:30px;font-size:13.5px;opacity:0;transform:translateY(-10px);transition:all .25s;box-shadow:0 4px 14px rgba(0,0,0,.2);}
.hsk-toast.show{opacity:1;transform:translateY(0);}
.hsk-toast-warn{background:var(--color-warning);}
.hsk-toast-achievement{background:var(--coral-dark);}
.hsk-toast-ok{background:var(--green);}

.hsk-modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:300;padding:20px;}
.hsk-modal-box{background:var(--paper);border-radius:var(--radius);padding:24px;max-width:420px;width:100%;position:relative;}
.hsk-modal-close{position:absolute;top:10px;right:12px;background:none;border:none;font-size:16px;cursor:pointer;color:var(--ink-soft);}
.hsk-modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px;}

/* ---------------- General polish: hover / focus / motion ---------------- */
a,button{transition:all .18s var(--ease);}
.hsk-btn:active{transform:scale(.97);}
.hsk-btn-primary{box-shadow:0 3px 10px rgba(226,85,74,.28);}
.hsk-btn-primary:hover{box-shadow:0 5px 16px rgba(226,85,74,.36);transform:translateY(-1px);}
.hsk-card,.hsk-path-item,.hsk-game-card-lg,.hsk-achv-card,.hsk-flashcard{transition:transform .2s var(--ease),box-shadow .2s var(--ease);}
.hsk-path-item:hover,.hsk-game-card-lg:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:var(--color-primary-soft);}
:focus-visible{outline:2.5px solid var(--coral);outline-offset:2px;border-radius:6px;}
.hsk-quiz-option:focus-visible{outline-offset:0;}

/* ---------------- Sticky lesson tabbar ---------------- */
.hsk-tabbar{position:sticky;top:0;z-index:20;background:var(--pink-bg);padding-top:8px;margin-top:-8px;}
@media (max-width:860px){ .hsk-tabbar{top:0;} }

/* Section-complete micro state on tab content */
.hsk-tab-content{animation:hskFadeIn .25s var(--ease);}
@keyframes hskFadeIn{ from{opacity:0;transform:translateY(4px);} to{opacity:1;transform:none;} }

@media (max-width: 860px){
  #hsk-sidenav{display:none;}
  #hsk-bottomnav{display:flex;}
  .hsk-page{padding:18px 16px 90px;}
  .hsk-stat-grid{grid-template-columns:repeat(2,1fr);}
  .hsk-quiz-options{grid-template-columns:1fr;}
  .hsk-game-grid-lg{grid-template-columns:repeat(2,1fr);}
  .hsk-achv-grid{grid-template-columns:1fr 1fr;}
}
@media (min-width: 861px){
  #hsk-app-root{padding-top:0;}
}