/*
Theme Name: JunTopik
Theme URI: https://trungquanstore.com
Author: Trung Quân
Description: Theme học tiếng Hàn / luyện thi TOPIK theo phong cách neo-brutalist. Sidebar cố định, nền giấy kẻ ô hồng, kệ sách dựng bằng CSS. Dùng làm lớp giao diện cho plugin TQS TOPIK.
Version: 2.1.3
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: juntopik
Tags: education, custom-menu, translation-ready
*/

/* ============================================================
   1. TOKENS
   ============================================================ */
:root{
  --ink:#000;
  --paper:#fff;
  --pink:#FF3D77;
  --pink-soft:#FFEFF4;
  --pink-line:#FFC9D9;
  --pink-brush:#FF5C8A;
  --yellow:#FFE01A;
  --blue:#0E6DBE;
  --muted:#6b6b6b;

  --bd:3px;
  --sh:4px 4px 0 var(--ink);
  --sh-sm:3px 3px 0 var(--ink);
  --r:14px;

  --sidebar-w:270px;
  --bg-app:#e9e9e9;
  --surface:#fff;
  --surface-2:#f2f2f2;
  --text-soft:#555;
  --font:"Be Vietnam Pro","BeVietnamPro",-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
}

/* Màu phụ suy ra từ màu chủ đạo, nên đổi --pink là cả site đổi theo. */
@supports (color:color-mix(in srgb,red 50%,white)){
  :root{
    --pink-brush:color-mix(in srgb,var(--pink) 86%,white);
    --pink-soft:color-mix(in srgb,var(--pink) 7%,white);
    --pink-line:color-mix(in srgb,var(--pink) 24%,white);
  }
  html[data-mode="dark"]{
    --pink-brush:color-mix(in srgb,var(--pink) 82%,black);
    --pink-soft:color-mix(in srgb,var(--pink) 10%,#101014);
    --pink-line:color-mix(in srgb,var(--pink) 22%,#101014);
  }
  @media (prefers-color-scheme:dark){
    html[data-mode="auto"]{
      --pink-brush:color-mix(in srgb,var(--pink) 82%,black);
      --pink-soft:color-mix(in srgb,var(--pink) 10%,#101014);
      --pink-line:color-mix(in srgb,var(--pink) 22%,#101014);
    }
  }
}

/* ---- CHẾ ĐỘ TỐI ---- */
html[data-mode="dark"]{
  --ink:#f0f0f2;
  --paper:#1b1b20;
  --yellow:#F2C230;
  --bg-app:#0d0d10;
  --surface:#1b1b20;
  --surface-2:#26262d;
  --text-soft:#a8a8b3;
  color-scheme:dark;
}
@media (prefers-color-scheme:dark){
  html[data-mode="auto"]{
    --ink:#f0f0f2;
    --paper:#1b1b20;
    --yellow:#F2C230;
    --bg-app:#0d0d10;
    --surface:#1b1b20;
    --surface-2:#26262d;
    --text-soft:#a8a8b3;
    color-scheme:dark;
  }
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--font);
  background:var(--bg-app);
  color:var(--ink);
  padding:12px;
  -webkit-font-smoothing:antialiased;
}
body.admin-bar{padding-top:44px}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
.screen-reader-text{
  position:absolute;width:1px;height:1px;overflow:hidden;
  clip:rect(1px,1px,1px,1px);white-space:nowrap;
}

/* ============================================================
   2. KHUNG APP
   ============================================================ */
.app{
  display:flex;
  max-width:1900px;
  margin:0 auto;
  height:calc(100vh - 24px);
  border:var(--bd) solid var(--ink);
  border-radius:22px;
  overflow:hidden;
  background:var(--paper);
}
body.admin-bar .app{height:calc(100vh - 68px)}

/* ============================================================
   3. SIDEBAR
   ============================================================ */
.sidebar{
  width:var(--sidebar-w);
  flex:0 0 var(--sidebar-w);
  border-right:var(--bd) solid var(--ink);
  background:var(--paper);
  display:flex;
  flex-direction:column;
  padding:16px 14px;
  overflow-y:auto;
  scrollbar-width:thin;
}

.brand{display:flex;align-items:center;gap:8px;padding:2px 4px 18px}
.brand-mark{
  background:var(--ink);color:#fff;border-radius:8px;
  padding:4px 7px;font-size:13px;font-weight:700;line-height:1;
}
.brand-name{font-size:16px;font-weight:800;letter-spacing:.5px;line-height:1.1}
.brand-name i{font-style:normal}
.brand-name i:nth-child(odd){color:#00A3E0}
.brand-name i:nth-child(even){color:var(--pink)}
.brand-name small{display:block;font-size:10px;color:var(--muted);font-weight:600;letter-spacing:2px}

.nav-label{
  font-size:11px;font-weight:700;color:var(--muted);
  letter-spacing:1.4px;padding:0 8px 8px;
}

.nav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  display:flex;align-items:center;gap:10px;
  width:100%;padding:9px 10px;border-radius:10px;
  font-size:14px;font-weight:600;text-align:left;
  border:var(--bd) solid transparent;
  transition:background .12s ease;
}
.nav-item:hover{background:var(--surface-2)}
.ico{flex:0 0 20px;width:20px;height:20px;display:block}
.nav-item .ico{flex:0 0 20px;width:20px;height:20px;display:block}
.nav-item .chev{margin-left:auto;width:14px;height:14px;transition:transform .18s ease}
.nav-item[aria-expanded="true"] .chev{transform:rotate(180deg)}
.nav-item.is-active{
  background:var(--pink);color:#fff;
  border-color:var(--ink);box-shadow:var(--sh-sm);
}
.nav-item.is-active:hover{background:var(--pink)}

.badge{
  margin-left:auto;background:var(--yellow);
  border:2px solid var(--ink);border-radius:6px;
  font-size:10px;font-weight:700;padding:1px 6px;line-height:1.5;
}

.submenu{display:none;flex-direction:column;gap:2px;padding:4px 0 4px 40px}
.submenu.is-open{display:flex}
.submenu a{font-size:13px;font-weight:500;color:var(--text-soft);padding:6px 8px;border-radius:8px}
.submenu a:hover{background:var(--surface-2);color:var(--ink)}

.btn-upgrade{
  display:flex;align-items:center;gap:10px;
  margin:16px 0 0;padding:11px 12px;
  background:var(--yellow);border:var(--bd) solid var(--ink);
  border-radius:12px;box-shadow:var(--sh-sm);
  font-size:14px;font-weight:700;
}
.btn-upgrade:active{transform:translate(3px,3px);box-shadow:none}

.sidebar-foot{margin-top:auto;padding-top:22px;display:flex;flex-direction:column;gap:4px}
.btn-login{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin-top:10px;padding:12px;
  background:var(--pink);color:#fff;
  border:var(--bd) solid var(--ink);border-radius:12px;box-shadow:var(--sh-sm);
  font-size:14px;font-weight:700;
}
.btn-login:active{transform:translate(3px,3px);box-shadow:none}

.user-chip{
  display:flex;align-items:center;gap:9px;margin-top:10px;padding:9px 10px;
  border:var(--bd) solid var(--ink);border-radius:12px;box-shadow:var(--sh-sm);
  background:var(--surface);font-size:13px;font-weight:700;
}
.user-chip img{border-radius:50%;border:2px solid var(--ink)}
.user-chip span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============================================================
   4. VÙNG NỘI DUNG — GIẤY KẺ Ô
   ============================================================ */
.main{
  flex:1;position:relative;overflow-y:auto;
  background-color:var(--pink-soft);
  background-image:
    linear-gradient(var(--pink-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--pink-line) 1px,transparent 1px);
  background-size:26px 26px;
}
.brush{
  position:absolute;top:-40px;right:0;left:auto;
  width:min(880px,66%);height:auto;
  pointer-events:none;z-index:0;
}
.brush-stroke{opacity:.85}

/* ---- chữ chạy ở nền ---- */
.bg-word{
  font-family:var(--font);
  font-weight:800;letter-spacing:-1px;
  color:transparent;
  -webkit-text-stroke:1.6px var(--pink-brush);
  fill:none;stroke:var(--pink-brush);stroke-width:1.6;
}
@supports not (-webkit-text-stroke:1px red){
  .bg-word{color:rgba(255,92,138,.28)}
}

/* kiểu hàng ngang */
.bg-rows{
  position:absolute;inset:0;z-index:0;
  overflow:hidden;pointer-events:none;
  display:flex;flex-direction:column;justify-content:space-around;
  padding:40px 0;
}
.bg-row{
  display:flex;flex:0 0 auto;white-space:nowrap;
  animation-name:junRunLeft;
  animation-timing-function:linear;
  animation-iteration-count:infinite;
}
.bg-row--rtl{animation-name:junRunRight}
.bg-track{display:inline-flex;align-items:center;gap:26px;padding-right:26px}
.bg-rows .bg-word{font-size:clamp(30px,5vw,80px);line-height:1.1}
.bg-dot{color:var(--pink-line);font-size:clamp(18px,2.6vw,40px)}

.bg-rows.is-static .bg-row{animation:none}
.bg-rows.is-static .bg-track:last-child{display:none}

@keyframes junRunLeft{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}
@keyframes junRunRight{
  from{transform:translateX(-50%)}
  to{transform:translateX(0)}
}

/* kiểu nét cọ viết ra chữ */
.bg-write{
  position:absolute;top:50%;left:50%;
  transform:translate(-50%,-50%);
  width:min(1000px,86%);height:auto;
  overflow:visible;
  z-index:0;pointer-events:none;
}
/* Nội dung luôn nằm trên lớp chữ nền, kể cả các khối không có nền riêng. */
.content > *{position:relative;z-index:1}

/* Nét cọ vẽ ra từng chữ cái.
   Mỗi chữ là một path thật nên đặt pathLength=100, nét chạy ra chính xác
   theo phần trăm. Vẽ xong giữ khoảng hai giây rồi mờ đi và vẽ lại. */
.bg-stroke{
  fill:none;
  stroke:var(--pink-brush);
  stroke-linecap:round;
  stroke-linejoin:round;
  stroke-dasharray:100;
  stroke-dashoffset:100;
  animation:junStroke var(--jun-write,8s) ease-in-out infinite;
}
/* Nét trong màu nền, chồng lên nét ngoài để chữ thành viền rỗng ruột. */
.bg-stroke--in{stroke:var(--pink-soft)}
@keyframes junStroke{
  0%   {stroke-dashoffset:100;opacity:1}
  6%   {stroke-dashoffset:0;opacity:1}
  72%  {stroke-dashoffset:0;opacity:1}
  86%  {stroke-dashoffset:0;opacity:0}
  100% {stroke-dashoffset:100;opacity:0}
}

/* kiểu vòng tròn */
.bg-rings{
  position:absolute;top:50%;left:50%;
  transform:translate(-50%,-50%);
  width:min(1100px,120vmin);height:min(1100px,120vmin);
  z-index:0;pointer-events:none;
}
.bg-rings .bg-word{
  font-size:44px;letter-spacing:2px;
  -webkit-text-stroke:0;
}
.ring{
  transform-origin:500px 500px;
  animation-name:junSpin;
  animation-timing-function:linear;
  animation-iteration-count:infinite;
}
.ring--back{animation-direction:reverse}
@keyframes junSpin{
  from{transform:rotate(0deg)}
  to{transform:rotate(360deg)}
}

/* ---- chữ nền theo từng cỡ máy ---- */

/* máy tính rộng: chữ to, nhiều hàng vẫn thoáng */
@media (min-width:1400px){
  .bg-rows .bg-word{font-size:clamp(56px,4.4vw,96px)}
  .bg-track{gap:34px;padding-right:34px}
}

/* máy tính bảng nằm ngang */
@media (max-width:1200px){
  .brush{width:min(680px,60%)}
  .bg-rows .bg-word{font-size:clamp(34px,5.6vw,64px)}
  .bg-rings .bg-word{font-size:46px}
}

/* máy tính bảng dựng đứng */
@media (max-width:900px){
  .bg-rows{padding:26px 0}
  .bg-track{gap:20px;padding-right:20px}
  .bg-rows .bg-word{font-size:clamp(30px,6.4vw,52px);-webkit-text-stroke-width:1.4px}
  .bg-rings{width:135vmin;height:135vmin}
  .bg-rings .bg-word{font-size:50px}
  .bg-write{width:92%}
}

/* điện thoại: bớt hàng cho đỡ rối, chữ vừa tầm nhìn */
@media (max-width:600px){
  .brush{width:130%;top:-16px;right:-30px}
  .bg-rows{padding:14px 0}
  .bg-track{gap:14px;padding-right:14px}
  .bg-rows .bg-word{font-size:clamp(26px,8vw,40px);-webkit-text-stroke-width:1.2px;letter-spacing:-.5px}
  .bg-dot{font-size:16px}
  .bg-row:nth-child(n+5){display:none}
  .bg-rings{width:170vmin;height:170vmin}
  .bg-rings .bg-word{font-size:58px;letter-spacing:1px}
  .bg-write{width:96%}
}

/* điện thoại nhỏ */
@media (max-width:380px){
  .bg-rows .bg-word{font-size:26px}
  .bg-row:nth-child(n+4){display:none}
}

/* máy nằm ngang, màn thấp: giảm số hàng cho khỏi chật */
@media (max-height:520px) and (orientation:landscape){
  .bg-rows{padding:8px 0}
  .bg-row:nth-child(n+4){display:none}
  .bg-rows .bg-word{font-size:clamp(24px,5vw,38px)}
}

@media (prefers-reduced-motion:reduce){
  .bg-row,.ring{animation:none!important}
  .bg-stroke{animation:none!important;stroke-dashoffset:0}
}

.content{position:relative;z-index:1;padding:26px 40px 90px;max-width:1440px;margin:0 auto}

.notice{
  background:var(--paper);
  border:var(--bd) solid var(--ink);border-radius:var(--r);
  box-shadow:var(--sh);
  padding:20px 24px;margin-bottom:28px;
}
.notice h1{font-size:24px;font-weight:800;margin-bottom:12px}
.notice p,.notice .notice-body{font-size:14px;line-height:1.7;max-width:74ch}
.notice .notice-body p + p{margin-top:6px}
.notice a{color:var(--pink);text-decoration:underline;text-underline-offset:3px;font-weight:600}

/* bài viết / trang thường */
.entry{
  background:var(--paper);border:var(--bd) solid var(--ink);
  border-radius:var(--r);box-shadow:var(--sh);
  padding:26px 30px;margin-bottom:22px;
}
.entry-title{font-size:26px;font-weight:800;line-height:1.25;margin-bottom:10px}
.entry-meta{font-size:12px;color:var(--text-soft);margin-bottom:16px}
.entry-content{font-size:15px;line-height:1.75;max-width:72ch}
.entry-content > * + *{margin-top:14px}
.entry-content h2{font-size:20px;font-weight:800;margin-top:26px}
.entry-content h3{font-size:17px;font-weight:700;margin-top:22px}
.entry-content a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.entry-content ul,.entry-content ol{padding-left:22px}
.entry-content li + li{margin-top:6px}
.entry-content blockquote{
  border-left:5px solid var(--ink);padding:4px 0 4px 14px;font-style:italic;
}
.entry-content img{border:var(--bd) solid var(--ink);border-radius:10px}

.pager{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
.pager a,.pager span{
  background:var(--surface);border:var(--bd) solid var(--ink);border-radius:10px;
  box-shadow:var(--sh-sm);padding:8px 14px;font-size:13px;font-weight:700;
}
.pager .current{background:var(--pink);color:#fff}

/* ============================================================
   5. KỆ SÁCH
   ============================================================ */
.series{margin-bottom:30px}
.sec-head{border-left:5px solid var(--ink);padding-left:12px;margin-bottom:14px}
.sec-head h2{font-size:20px;font-weight:800;line-height:1.3}
.sec-head p{font-size:12px;color:var(--text-soft);margin-top:1px}

.shelf{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}

.book{
  position:relative;display:block;
  aspect-ratio:3/4;
  border:var(--bd) solid var(--ink);border-radius:10px;
  box-shadow:var(--sh);overflow:hidden;
  transition:transform .12s ease,box-shadow .12s ease;
}
.book:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.book:active{transform:translate(3px,3px);box-shadow:none}
.book-thumb{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}

/* bìa TOPIK xanh */
.book--topik{background:var(--bg,var(--blue));display:grid;place-items:center}
.disc{width:72%;aspect-ratio:1;border-radius:50%;border:6px dotted #fff;padding:5px}
.disc-in{
  width:100%;height:100%;border-radius:50%;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:6px;
}
.disc-in strong{font-size:clamp(14px,2.1vw,26px);font-weight:800;letter-spacing:-.5px;line-height:1}
.disc-in em{font-size:clamp(7px,.85vw,11px);font-style:italic;color:#222;margin-top:3px;line-height:1.2}
.book--topik .num{
  position:absolute;right:8px;bottom:2px;
  font-size:clamp(30px,4.6vw,56px);font-weight:800;color:#fff;line-height:1;
}

/* bìa Màu Sắc */
.book--color{background:var(--bg);padding:8px;display:flex;flex-direction:column}
.book--color .tag{font-size:8px;font-weight:700}
.book--color .lock{
  position:absolute;top:6px;right:6px;width:13px;height:13px;
  border-radius:50%;background:#fff;border:2px solid var(--ink);
}
.book--color .ct-title{
  margin-top:2px;font-size:clamp(9px,1.15vw,14px);font-weight:800;
  white-space:nowrap;line-height:1.2;
}
.book--color .ct-title i{font-style:normal;color:var(--accent,#D5006D)}
.pattern{
  margin:6px auto;width:72%;
  display:grid;grid-template-columns:repeat(3,1fr);
  border:1px solid rgba(0,0,0,.25);
}
.pattern i{display:block;aspect-ratio:1}
.book--color .ct-foot{margin-top:auto;display:flex;align-items:flex-end;justify-content:space-between;gap:4px}
.book--color .ct-foot span{font-size:8px;font-weight:800;line-height:1.15;max-width:52px}
.pill{
  width:20px;height:20px;border-radius:50%;
  background:var(--pillbg,#111);color:var(--pillink,#fff);
  display:grid;place-items:center;font-size:11px;font-weight:800;
}

/* bìa Màu Vàng (núi) */
.book--peak{background:#fff}
.book--peak .peak{
  position:absolute;left:-6%;bottom:0;width:78%;height:88%;
  background:#B07C46;clip-path:polygon(50% 0,100% 100%,0 100%);
}
.book--peak .peak::after{
  content:"";position:absolute;right:0;bottom:0;width:42%;height:100%;
  background:rgba(255,255,255,.22);clip-path:polygon(100% 0,100% 100%,0 100%);
}
.book--peak .han{
  position:absolute;top:16%;left:0;right:0;text-align:center;
  font-size:9px;font-weight:700;color:#4a3620;
}
.book--peak .num{
  position:absolute;inset:0;display:grid;place-items:center;
  font-size:clamp(34px,5vw,60px);font-weight:800;line-height:1;
}
.book--peak .seal{
  position:absolute;left:50%;bottom:9%;transform:translateX(-50%);
  width:12px;height:12px;border-radius:50%;
  background:#2B4FA0;border:2px solid #C9302C;
}
.book--peak .lockbox{position:absolute;top:6px;right:6px;width:16px;height:16px}

/* ============================================================
   6. NÚT NỔI + MOBILE
   ============================================================ */
.fabs{position:fixed;right:26px;bottom:24px;display:flex;flex-direction:column;gap:10px;z-index:5}
.fab{
  display:flex;align-items:center;gap:7px;
  padding:9px 14px;background:var(--pink);color:#fff;
  border:var(--bd) solid var(--ink);border-radius:10px;box-shadow:var(--sh-sm);
  font-size:13px;font-weight:700;
}
.fab:active{transform:translate(3px,3px);box-shadow:none}

.menu-btn{
  display:none;position:fixed;top:22px;left:22px;z-index:20;
  width:44px;height:44px;background:var(--paper);
  border:var(--bd) solid var(--ink);border-radius:10px;box-shadow:var(--sh-sm);
  place-items:center;
}
body.admin-bar .menu-btn{top:60px}
.scrim{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:9}
.scrim.is-open{display:block}

@media (max-width:1100px){ .shelf{grid-template-columns:repeat(4,minmax(0,1fr))} }
@media (max-width:860px){
  body{padding:0}
  .app{height:100vh;border:0;border-radius:0}
  body.admin-bar .app{height:calc(100vh - 46px)}
  .menu-btn{display:grid}
  .sidebar{
    position:fixed;top:0;bottom:0;left:0;z-index:10;
    transform:translateX(-102%);transition:transform .22s ease;
    box-shadow:6px 0 0 rgba(0,0,0,.15);
  }
  .sidebar.is-open{transform:none}
  .content{padding:80px 18px 90px}
  .entry{padding:20px 18px}
  .shelf{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
  .notice h1{font-size:20px}
}
@media (max-width:520px){ .shelf{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (prefers-reduced-motion:reduce){ *{transition:none!important} }

/* ============================================================
   7. THANH TRÊN CÙNG CHO ĐIỆN THOẠI
   ============================================================ */
.mobile-bar{display:none}
.mobile-brand{display:flex;align-items:center;gap:8px}
.mobile-brand .brand-name{font-size:15px}

/* ============================================================
   8. TRÌNH ĐỌC SÁCH
   ============================================================ */
.reader{margin-bottom:26px}

/* thanh công cụ */
.reader-bar{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;row-gap:8px;
  background:var(--paper);border:var(--bd) solid var(--ink);
  border-radius:12px 12px 0 0;box-shadow:var(--sh);
  padding:10px 14px;
}

.reader-group{display:inline-flex;align-items:center;gap:6px}
.reader-step{
  width:30px;height:30px;flex:0 0 30px;
  display:grid;place-items:center;
  border:2px solid var(--ink);border-radius:8px;background:var(--surface);
}
.reader-step svg{width:15px;height:15px}
.reader-step:hover{background:var(--pink);color:#fff}
.reader-step:active{transform:translate(1px,1px)}
.reader-group input{
  width:54px;padding:5px 6px;text-align:center;
  font:inherit;font-size:13px;font-weight:700;
  border:2px solid var(--ink);border-radius:8px;background:var(--surface);
}
.reader-total{font-size:13px;font-weight:700;color:var(--text-soft);min-width:34px}
.reader-zoomval{
  min-width:56px;padding:5px 6px;font-size:12px;font-weight:700;
  border:2px solid var(--ink);border-radius:8px;background:var(--surface);
}
.reader-btn{
  margin-left:auto;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;font-size:13px;font-weight:800;
  background:var(--yellow);border:2px solid var(--ink);border-radius:9px;
}
.reader-btn svg{width:15px;height:15px}
.reader-btn:active{transform:translate(1px,1px)}

/* khung sách */
.reader-stage{
  position:relative;
  background:#3A2A1C;
  border:var(--bd) solid var(--ink);border-top:0;
  border-radius:0 0 12px 12px;box-shadow:var(--sh);
  padding:14px;
}
.reader-scroll{
  position:relative;
  width:100%;height:clamp(460px,72vh,1000px);
  overflow:auto;
  display:flex;align-items:flex-start;justify-content:center;
  background:#1d1d1d;border-radius:4px;
  -webkit-overflow-scrolling:touch;
}
#junCanvas{
  display:block;margin:10px auto;background:#fff;
  box-shadow:0 8px 26px rgba(0,0,0,.5);
  opacity:0;transition:opacity .18s ease;
}
#junCanvas.is-ready{opacity:1}

/* bìa hiện ngay trong lúc trang đầu đang dựng */
.reader-cover{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  max-width:min(86%,380px);max-height:86%;
  border-radius:3px;box-shadow:0 10px 30px rgba(0,0,0,.55);
  z-index:2;
}
.reader-cover[hidden]{display:none}

/* dòng trạng thái */
.reader-status{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  z-index:3;max-width:86%;text-align:center;
  padding:8px 16px;border-radius:10px;
  background:rgba(0,0,0,.8);color:#fff;
  font-size:12px;font-weight:600;
}
.reader-status[hidden]{display:none}
.reader-status a{color:#ffd84d;text-decoration:underline}

/* vùng chạm lật trang */
.reader-tap{
  position:absolute;top:60px;bottom:40px;width:13%;
  background:transparent;border:0;cursor:pointer;z-index:1;
}
.reader-tap--prev{left:14px}
.reader-tap--next{right:14px}
.reader-tap:hover{background:rgba(255,255,255,.06)}

.reader-hint{font-size:12px;color:var(--text-soft);margin-top:10px}

/* toàn màn hình: dùng cả :fullscreen lẫn class dự phòng */
#junReader:fullscreen,
.reader.is-faux{
  position:fixed;inset:0;z-index:9999;margin:0;
  display:flex;flex-direction:column;background:#141414;
}
#junReader:fullscreen .reader-bar,
.reader.is-faux .reader-bar{
  border-radius:0;box-shadow:none;border-left:0;border-right:0;border-top:0;
}
#junReader:fullscreen .reader-stage,
.reader.is-faux .reader-stage{
  flex:1;min-height:0;padding:0;background:#141414;
  border:0;border-radius:0;box-shadow:none;
}
#junReader:fullscreen .reader-scroll,
.reader.is-faux .reader-scroll{height:100%;background:#141414}
#junReader:fullscreen .reader-hint,
.reader.is-faux .reader-hint{display:none}
#junReader:fullscreen .reader-status,
.reader.is-faux .reader-status{
  top:50%;bottom:auto;transform:translate(-50%,-50%);font-size:14px;padding:12px 20px;
}
#junReader:fullscreen .reader-tap,
.reader.is-faux .reader-tap{top:0;bottom:0;width:16%}
.reader.is-faux .reader-tap--prev{left:0}
.reader.is-faux .reader-tap--next{right:0}

/* màn chắn khi sách bị khoá */
.reader-gate{
  display:flex;gap:22px;align-items:center;flex-wrap:wrap;
  background:var(--paper);border:var(--bd) solid var(--ink);
  border-radius:var(--r);box-shadow:var(--sh);padding:26px;
}
.reader-gate img{
  width:150px;border:var(--bd) solid var(--ink);border-radius:10px;box-shadow:var(--sh-sm);
}
.reader-gate h2{font-size:20px;font-weight:800;margin-bottom:6px}
.reader-gate p{font-size:14px;color:var(--text-soft);margin-bottom:14px}

/* ============================================================
   9. ĐIỆN THOẠI
   ============================================================ */
@media (max-width:860px){
  .mobile-bar{
    display:flex;align-items:center;gap:12px;
    position:sticky;top:0;z-index:8;
    background:var(--paper);
    border-bottom:var(--bd) solid var(--ink);
    padding:8px 12px;
  }
  .menu-btn{
    display:grid;position:static;top:auto;left:auto;
    width:40px;height:40px;box-shadow:var(--sh-sm);
  }
  .content{padding:18px 14px 90px}

  .reader-bar{padding:8px 10px;gap:8px}
  .reader-btn{padding:7px 10px}
  .reader-btn span{display:none}
  .reader-stage{padding:8px}
  .reader-scroll{height:calc(100vh - 260px);min-height:360px}
  .reader-tap{width:18%;top:20px;bottom:20px}
  .reader-hint{font-size:11px}
}

/* ============================================================
   10. TRANG CÀI ĐẶT HIỂN THỊ
   ============================================================ */
.prefs .entry-title{font-size:19px}

.swatches{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
.swatch{
  width:46px;height:46px;padding:0;
  background:var(--sw,#ccc);
  border:var(--bd) solid var(--ink);border-radius:12px;
  box-shadow:var(--sh-sm);
  position:relative;
}
.swatch:active{transform:translate(2px,2px);box-shadow:none}
.swatch.is-active::after{
  content:"";position:absolute;inset:6px;
  border:3px solid #fff;border-radius:6px;
  box-shadow:0 0 0 2px rgba(0,0,0,.35);
}
.swatch--custom{
  display:grid;place-items:center;overflow:hidden;
  background:conic-gradient(#E5322F,#F2B705,#2E9E4F,#2F7BE0,#7A4BE0,#FF3D77,#E5322F);
  cursor:pointer;
}
.swatch--custom input{
  width:150%;height:150%;border:0;padding:0;background:none;
  opacity:0;cursor:pointer;
}

.modes{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
.mode{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 18px;font-size:14px;font-weight:700;
  background:var(--surface);color:var(--ink);
  border:var(--bd) solid var(--ink);border-radius:12px;
  box-shadow:var(--sh-sm);
}
.mode svg{width:18px;height:18px}
.mode:active{transform:translate(2px,2px);box-shadow:none}
.mode.is-active{background:var(--pink);color:#fff}

.prefs-foot{display:flex;align-items:center;gap:14px;margin-top:24px;flex-wrap:wrap}
.prefs-reset{
  padding:9px 16px;font-size:13px;font-weight:700;
  background:var(--surface);border:2px solid var(--ink);border-radius:10px;
}
.prefs-reset:hover{background:var(--surface-2)}
.prefs-note{
  font-size:13px;font-weight:700;color:#1e7e34;
}
.prefs-note.is-bad{color:#c0392b}
.prefs-note[hidden]{display:none}

/* vài chỗ cần chỉnh riêng khi ở chế độ tối */
html[data-mode="dark"] .book--peak,
html[data-mode="dark"] #junCanvas{filter:none}
html[data-mode="dark"] .reader-stage{background:#26201a}
html[data-mode="dark"] .notice a{text-decoration-color:var(--pink)}

/* ============================================================
   11. FORM DÙNG CHUNG
   ============================================================ */
.form{display:flex;flex-direction:column;gap:14px;margin-top:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field > span{font-size:13px;font-weight:700}
.field input,.field textarea,.field select,
.member-filter input,.member-filter select{
  width:100%;padding:11px 13px;
  font:inherit;font-size:14px;
  color:var(--ink);background:var(--surface);
  border:var(--bd) solid var(--ink);border-radius:10px;
}
.field textarea{resize:vertical;min-height:80px}
.field input:focus,.field textarea:focus{outline:0;box-shadow:var(--sh-sm)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field-hint{font-size:12px;color:var(--text-soft)}

.check{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600}
.check input{width:16px;height:16px;accent-color:var(--pink)}

.btn-primary{
  padding:13px 20px;font-size:14px;font-weight:800;
  background:var(--pink);color:#fff;
  border:var(--bd) solid var(--ink);border-radius:12px;box-shadow:var(--sh-sm);
}
.btn-primary:active{transform:translate(3px,3px);box-shadow:none}
.btn-sm{padding:10px 16px;font-size:13px}

.btn-file{
  display:inline-block;position:relative;overflow:hidden;
  padding:9px 16px;font-size:13px;font-weight:700;cursor:pointer;
  background:var(--yellow);color:#111;
  border:2px solid var(--ink);border-radius:10px;
}
.btn-file input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}

.honeypot{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

.form-note{
  margin-top:14px;padding:11px 14px;font-size:13px;font-weight:700;
  border:var(--bd) solid var(--ink);border-radius:10px;
  background:#ffe9ec;color:#a01128;
}
.form-note--ok{background:#e6f6ec;color:#186c37}
html[data-mode="dark"] .form-note{background:#3a1620;color:#ffb3c0}
html[data-mode="dark"] .form-note--ok{background:#123322;color:#8fe0ae}

/* ============================================================
   12. ĐĂNG NHẬP / ĐĂNG KÝ
   ============================================================ */
.auth{display:flex;justify-content:center;padding:20px 0 40px}
.auth-card{
  width:100%;max-width:440px;
  background:var(--paper);
  border:var(--bd) solid var(--ink);border-radius:var(--r);
  box-shadow:var(--sh);padding:28px 26px;
}
.auth-card h1{font-size:24px;font-weight:800}
.auth-sub{font-size:13px;color:var(--text-soft);margin-top:4px}
.auth-foot{
  display:flex;flex-direction:column;gap:8px;
  margin-top:18px;padding-top:16px;
  border-top:2px solid var(--ink);
  font-size:13px;
}
.auth-foot a{color:var(--pink);font-weight:700;text-decoration:underline;text-underline-offset:3px}

/* ============================================================
   13. BẢNG ĐIỀU KHIỂN THÀNH VIÊN
   ============================================================ */
.dash-head{
  display:flex;align-items:center;gap:22px;flex-wrap:wrap;
  background:var(--paper);
  border:var(--bd) solid var(--ink);border-radius:var(--r);
  box-shadow:var(--sh);padding:22px 26px;margin-bottom:22px;
}
.dash-avatar img{
  width:110px;height:110px;border-radius:50%;object-fit:cover;
  border:var(--bd) solid var(--ink);box-shadow:var(--sh-sm);
}
.dash-id h1{font-size:24px;font-weight:800}
.dash-meta{font-size:12px;color:var(--text-soft);margin-top:4px}
.dash-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.chip{
  padding:7px 14px;font-size:12px;font-weight:700;
  background:var(--surface);border:2px solid var(--ink);border-radius:9px;
}
.chip:hover{background:var(--pink);color:#fff}
.chip--out{background:var(--yellow);color:#111}

.dash-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}

.avatar-edit{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.avatar-edit img{
  width:88px;height:88px;border-radius:50%;object-fit:cover;
  border:var(--bd) solid var(--ink);
}

/* ============================================================
   14. QUẢN LÝ THÀNH VIÊN
   ============================================================ */
.stats{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0 20px}
.stat{
  padding:12px 18px;min-width:110px;
  background:var(--surface);border:2px solid var(--ink);border-radius:12px;
}
.stat strong{display:block;font-size:22px;font-weight:800}
.stat span{font-size:11px;color:var(--text-soft);font-weight:600}

.member-filter{display:flex;gap:10px;flex-wrap:wrap}
.member-filter input{flex:1;min-width:180px}
.member-filter select{width:auto;min-width:150px}

.member-list{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.member{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:12px 14px;
  background:var(--surface);border:2px solid var(--ink);border-radius:12px;
}
.member img{width:52px;height:52px;border-radius:50%;object-fit:cover;border:2px solid var(--ink)}
.member-info{flex:1;min-width:180px;display:flex;flex-direction:column;gap:2px}
.member-info strong{font-size:15px;font-weight:800}
.member-info span{font-size:12px;color:var(--text-soft);word-break:break-word}
.member-dates{font-size:11px}
.member-act{margin:0}
.member-act select{
  padding:8px 10px;font:inherit;font-size:12px;font-weight:700;
  color:var(--ink);background:var(--surface);
  border:2px solid var(--ink);border-radius:9px;
}
.member-role{font-size:12px;font-weight:700;color:var(--text-soft)}
.btn-del{
  width:34px;height:34px;font-size:18px;font-weight:800;line-height:1;
  background:var(--surface);border:2px solid var(--ink);border-radius:9px;
}
.btn-del:hover{background:#c0392b;color:#fff}

@media (max-width:860px){
  .dash-grid{grid-template-columns:1fr}
  .dash-head{padding:18px;gap:16px}
  .dash-avatar img{width:84px;height:84px}
  .field-row{grid-template-columns:1fr}
  .auth-card{padding:22px 18px}
}
.form-note--warn{background:#fff6e0;color:#8a5b00}
html[data-mode="dark"] .form-note--warn{background:#3a2e10;color:#ffd98a}

/* chữ nền luôn nằm dưới nội dung và không bắt chuột */
.bg-rows,.bg-rings,.bg-write,.brush{user-select:none}

/* ============================================================
   15. TRANG SÁCH: ĐẦU TRANG
   ============================================================ */
.crumb{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--ink);
  margin-bottom:16px;
}
.crumb svg{width:16px;height:16px}
.crumb:hover{color:var(--pink)}

.hero{display:flex;gap:26px;align-items:flex-start;flex-wrap:wrap;margin-bottom:24px}
.hero-cover img{
  width:150px;aspect-ratio:3/4;object-fit:cover;display:block;
  border:var(--bd) solid var(--ink);border-radius:10px;box-shadow:var(--sh);
}
.hero-text{flex:1;min-width:240px}
.hero-tags{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.hero-badge{
  padding:5px 14px;font-size:12px;font-weight:800;
  background:var(--pink);color:#fff;
  border:var(--bd) solid var(--ink);border-radius:8px;
}
.hero-sub{font-size:13px;font-weight:600;color:var(--text-soft)}
.hero-title{font-size:clamp(24px,4vw,34px);font-weight:800;line-height:1.25}
.hero-title span{
  background:var(--yellow);color:#111;
  padding:2px 12px;box-decoration-break:clone;-webkit-box-decoration-break:clone;
}
.hero-desc{font-size:14px;line-height:1.7;color:var(--text-soft);margin-top:10px;max-width:70ch}

/* ============================================================
   16. THẺ KỸ NĂNG
   ============================================================ */
.skills{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:20px}
.skills-label{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--text-soft)}
.skill{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;
  background:var(--surface);color:var(--ink);
  border:var(--bd) solid var(--ink);border-radius:12px;box-shadow:var(--sh);
  font-size:15px;
}
.skill svg{width:18px;height:18px}
.skill b{font-weight:800}
.skill i{font-style:normal;font-size:13px;opacity:.7}
.skill:active{transform:translate(3px,3px);box-shadow:none}
.skill.is-active{background:var(--pink);color:#fff}

/* ============================================================
   17. DANH SÁCH BÀI HỌC
   ============================================================ */
.lessons{margin-bottom:24px}
.lessons-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.lessons-head h2{font-size:14px;font-weight:800;letter-spacing:1.5px;color:var(--text-soft)}
.lessons-search{
  margin-left:auto;min-width:180px;flex:1;max-width:300px;
  padding:9px 13px;font:inherit;font-size:13px;
  color:var(--ink);background:var(--surface);
  border:2px solid var(--ink);border-radius:10px;
}

.lesson{
  display:flex;align-items:center;gap:16px;
  padding:16px 18px;
  background:var(--surface);color:var(--ink);
  border:var(--bd) solid var(--ink);border-radius:14px;
  box-shadow:var(--sh);
  margin-bottom:14px;
  transition:transform .12s ease,box-shadow .12s ease;
}
.lesson[hidden]{display:none}
.lesson:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.lesson:active{transform:translate(3px,3px);box-shadow:none}

.lesson-no{
  flex:0 0 auto;min-width:46px;height:46px;
  display:grid;place-items:center;padding:0 8px;
  background:var(--surface);
  border:var(--bd) solid var(--ink);border-radius:10px;
  font-size:18px;font-weight:800;
}
.lesson:hover .lesson-no{background:var(--pink);color:#fff}
.lesson-text{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.lesson-text strong{font-size:19px;font-weight:800;line-height:1.2;word-break:break-word}
.lesson-text span{font-size:13px;color:var(--text-soft)}
.lesson-arrow{width:22px;height:22px;flex:0 0 22px;color:var(--text-soft)}
.lesson:hover .lesson-arrow{color:var(--pink)}

.lessons-empty{font-size:13px;color:var(--text-soft);padding:10px 4px}
.lessons-empty[hidden]{display:none}

.skill-panel[hidden]{display:none}
#junReader[hidden]{display:none}

@media (max-width:860px){
  .hero{gap:16px}
  .hero-cover img{width:110px}
  .skills{gap:8px}
  .skill{padding:10px 14px;font-size:14px}
  .skills-label{width:100%}
  .lessons-search{margin-left:0;max-width:none;width:100%}
  .lesson > summary{padding:13px 12px;gap:12px}
  .lesson-no{min-width:40px;height:40px;font-size:16px}
  .lesson-text strong{font-size:17px}
  }

/* ============================================================
   18. TRANG MỘT BÀI HỌC
   ============================================================ */
.lp-tags{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.lp-badge{
  padding:6px 16px;font-size:14px;font-weight:800;
  background:var(--pink);color:#fff;
  border:var(--bd) solid var(--ink);border-radius:9px;
}
.lp-ko{font-size:15px;font-weight:700;color:var(--text-soft)}
.lp-meta{font-size:14px;color:var(--text-soft)}

.lp-title{font-size:clamp(26px,5.5vw,40px);font-weight:800;line-height:1.25}
.lp-title span{
  background:var(--pink-line);color:var(--ink);
  padding:2px 10px;box-decoration-break:clone;-webkit-box-decoration-break:clone;
}
.lp-peek{
  font-size:17px;font-style:italic;color:var(--text-soft);
  margin:12px 0 20px;word-break:break-word;
}

.lp-actions{display:flex;justify-content:flex-end;margin-bottom:18px}
.lp-all{
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 22px;font-size:15px;font-weight:800;
  background:var(--yellow);color:#111;
  border:var(--bd) solid var(--ink);border-radius:12px;box-shadow:var(--sh);
}
.lp-all svg{width:19px;height:19px}
.lp-all:active{transform:translate(3px,3px);box-shadow:none}

/* thẻ từ vựng / mẫu ngữ pháp */
.card{
  background:var(--paper);
  border:var(--bd) solid var(--ink);border-radius:14px;
  box-shadow:var(--sh);margin-bottom:18px;overflow:hidden;
}
.card-top{display:flex;gap:14px;padding:18px 20px;align-items:flex-start}
.card-no{font-size:15px;font-weight:700;color:var(--text-soft);padding-top:8px}
.card-main{flex:1;min-width:0}
.card-term{font-size:clamp(24px,5vw,32px);font-weight:800;line-height:1.25;word-break:break-word}
.card-read{font-size:15px;font-style:italic;color:var(--text-soft);margin-top:4px}
.card-note{font-size:15px;font-weight:800;color:#d2601a;margin-top:6px}
.card-mean{font-size:17px;font-weight:700;color:var(--blue);margin-top:6px;line-height:1.5}
.card--gram .card-mean{font-size:16px}

.card-btns{display:flex;gap:8px;flex:0 0 auto}
.card-btn{
  width:44px;height:44px;flex:0 0 44px;
  display:grid;place-items:center;
  background:var(--surface);color:var(--ink);
  border:var(--bd) solid var(--ink);border-radius:10px;box-shadow:var(--sh-sm);
}
.card-btn svg{width:20px;height:20px}
.card-btn:active{transform:translate(2px,2px);box-shadow:none}
.card-btn.is-playing{background:var(--pink);color:#fff}

.card-ex{
  display:flex;align-items:center;gap:14px;
  padding:16px 20px;
  background:#eef8ee;
  border-top:var(--bd) solid var(--ink);
}
html[data-mode="dark"] .card-ex{background:#16241a}
.card-ex > div{flex:1;min-width:0}
.card-ex-ko{font-size:17px;line-height:1.5;word-break:break-word}
.card-ex-vi{font-size:15px;color:var(--text-soft);margin-top:6px}

.lp-nav{display:flex;justify-content:space-between;gap:12px;margin:24px 0 10px}
.lp-nav-btn{
  padding:11px 20px;font-size:14px;font-weight:800;
  background:var(--surface);
  border:var(--bd) solid var(--ink);border-radius:12px;box-shadow:var(--sh-sm);
}
.lp-nav-btn:hover{background:var(--pink);color:#fff}
.lp-nav-btn--next{margin-left:auto}

@media (max-width:860px){
  .lp-all{width:100%;justify-content:center}
  .lp-actions{margin-bottom:14px}
  .card-top{padding:14px;gap:10px}
  .card-btn{width:40px;height:40px;flex:0 0 40px}
  .card-ex{padding:13px 14px}
}

/* ============================================================
   19. TRANG TỔNG HỢP TỪ VỰNG / NGỮ PHÁP
   ============================================================ */
.arc-head{
  background:var(--paper);
  border:var(--bd) solid var(--ink);border-radius:var(--r);
  box-shadow:var(--sh);padding:22px 24px;margin-bottom:22px;
}
.arc-head h1{font-size:26px;font-weight:800}
.arc-head p{font-size:14px;color:var(--text-soft);margin-top:6px;max-width:70ch}
.arc-search{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.arc-search input{
  flex:1;min-width:200px;padding:12px 14px;
  font:inherit;font-size:14px;
  color:var(--ink);background:var(--surface);
  border:var(--bd) solid var(--ink);border-radius:10px;
}

.arc-results{margin-bottom:24px}
.hit{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:13px 16px;margin-bottom:8px;
  background:var(--surface);color:var(--ink);
  border:2px solid var(--ink);border-radius:11px;
}
.hit:hover{background:var(--yellow)}
.hit-main{flex:1;min-width:200px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.hit-main strong{font-size:18px;font-weight:800}
.hit-main em{font-size:13px;color:var(--text-soft)}
.hit-mean{font-size:14px;color:var(--blue);font-weight:700}
.hit-src{font-size:12px;color:var(--text-soft);font-weight:600}

.arc-book{
  display:flex;align-items:center;gap:16px;
  padding:14px 16px;margin-bottom:14px;
  background:var(--surface);color:var(--ink);
  border:var(--bd) solid var(--ink);border-radius:14px;box-shadow:var(--sh);
  transition:transform .12s ease,box-shadow .12s ease;
}
.arc-book:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.arc-book:active{transform:translate(3px,3px);box-shadow:none}
.arc-book img{
  width:56px;aspect-ratio:3/4;object-fit:cover;flex:0 0 56px;
  border:2px solid var(--ink);border-radius:7px;
}
.arc-book-blank{
  width:56px;aspect-ratio:3/4;flex:0 0 56px;
  display:grid;place-items:center;
  background:var(--pink);color:#fff;
  border:2px solid var(--ink);border-radius:7px;
  font-size:22px;font-weight:800;
}
.arc-book-text{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.arc-book-cat{font-size:11px;font-weight:800;color:var(--pink);letter-spacing:.5px}
.arc-book-text strong{font-size:17px;font-weight:800;line-height:1.25}
.arc-book-meta{font-size:13px;color:var(--text-soft)}

@media (max-width:860px){
  .arc-head{padding:16px 14px}
  .arc-search input{min-width:0}
  .arc-book{padding:12px;gap:12px}
}

/* ============================================================
   20. HỎI AI
   ============================================================ */
.card-ai{background:var(--blue,#3f5efb);color:#fff}
.card-ai:hover{filter:brightness(1.08)}

.ai-sheet{position:fixed;inset:0;z-index:9998;display:flex;align-items:flex-end;justify-content:center}
.ai-sheet[hidden]{display:none}
.ai-sheet-back{
  position:absolute;inset:0;background:rgba(0,0,0,.45);
  opacity:0;transition:opacity .25s ease;
}
.ai-sheet.is-open .ai-sheet-back{opacity:1}
.ai-sheet-panel{
  position:relative;width:100%;max-width:720px;max-height:86vh;
  display:flex;flex-direction:column;
  background:var(--paper);
  border:var(--bd) solid var(--ink);border-bottom:0;
  border-radius:18px 18px 0 0;
  transform:translateY(100%);transition:transform .25s ease;
}
.ai-sheet.is-open .ai-sheet-panel{transform:translateY(0)}
.ai-sheet-grip{
  width:64px;height:5px;margin:10px auto 0;flex:0 0 auto;
  background:var(--ink);opacity:.25;border-radius:99px;
}
.ai-sheet-head{
  display:flex;align-items:center;gap:12px;
  padding:12px 18px 14px;flex:0 0 auto;
  border-bottom:2px solid var(--ink);
}
.ai-sheet-head h2{flex:1;min-width:0;font-size:22px;font-weight:800;word-break:break-word}
.ai-sheet-btns{display:flex;gap:8px;flex:0 0 auto}
.ai-sheet-body{
  padding:18px;overflow-y:auto;-webkit-overflow-scrolling:touch;
  font-size:15px;line-height:1.65;
}

.ai-head{font-size:20px;margin-bottom:12px}
.ai-head b{font-weight:800}
.ai-head i{font-size:14px;color:var(--text-soft);font-style:italic}

.ai-row{display:flex;gap:10px;margin-bottom:12px;align-items:flex-start}
.ai-row strong{font-weight:800}
.ai-ico{
  width:24px;height:24px;flex:0 0 24px;margin-top:1px;
  display:grid;place-items:center;
  background:var(--surface-2);color:var(--ink);
  border:2px solid var(--ink);border-radius:6px;
  font-size:12px;font-weight:800;line-height:1;
}
.ai-warn .ai-ico{background:#f6c343}

.ai-list{list-style:none;margin-top:6px;display:flex;flex-direction:column;gap:8px}
.ai-list li{padding-left:12px;border-left:3px solid var(--pink-line,var(--surface-2))}
.ai-list b{font-weight:800}
.ai-list i{font-size:13px;color:var(--text-soft);font-style:italic}
.ai-list--ex span{display:block;color:var(--text-soft);font-size:14px}

.ai-foot{margin-top:18px;font-size:12px;color:var(--text-soft);font-style:italic}

.ai-load{padding:34px 0;display:flex;flex-direction:column;align-items:center;gap:14px;color:var(--text-soft)}
.ai-spin{
  width:30px;height:30px;border-radius:50%;
  border:3px solid var(--surface-2);border-top-color:var(--pink);
  animation:ai-spin .8s linear infinite;
}
@keyframes ai-spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){
  .ai-spin{animation-duration:2s}
  .ai-sheet-panel,.ai-sheet-back{transition:none}
}

.ai-fail{padding:26px 0;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px}
.ai-fail p{color:var(--text-soft)}

@media (max-width:860px){
  .ai-sheet-panel{max-height:90vh}
  .ai-sheet-body{padding:15px}
  .ai-sheet-head{padding:10px 14px 12px}
  .ai-sheet-head h2{font-size:19px}
}

.form-note a{color:inherit;text-decoration:underline;text-underline-offset:3px;margin-left:8px}


/* ============================================================
   23. TRANG NÂNG CẤP TÀI KHOẢN
   ============================================================ */
.upgrade-page{
  width:min(1040px,100%);
  margin:0 auto;
  padding:12px 0 44px;
}
.upgrade-head{text-align:center;padding:8px 12px 22px}
.upgrade-crown{
  width:40px;height:40px;display:grid;place-items:center;margin:0 auto 8px;
  background:var(--yellow);border:var(--bd) solid var(--ink);border-radius:5px;
  box-shadow:var(--sh-sm);
}
.upgrade-crown .ico{width:23px;height:23px}
.upgrade-head h1{font-size:26px;line-height:1.2;font-weight:900}
.upgrade-head p{margin-top:5px;font-size:12px;color:var(--text-soft);font-weight:600}

.upgrade-promo{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;
  background:#dcecff;border:var(--bd) solid var(--ink);border-radius:8px;
  box-shadow:var(--sh-sm);padding:11px 13px;margin-bottom:25px;
}
.upgrade-promo-icon{
  width:28px;height:28px;display:grid;place-items:center;border-radius:4px;
  background:#1877f2;color:#fff;font-size:19px;font-weight:900;font-family:Arial,sans-serif;
  border:2px solid var(--ink);
}
.upgrade-promo-copy{min-width:0;display:flex;flex-direction:column;gap:2px}
.upgrade-promo-copy strong{font-size:12px;line-height:1.35}
.upgrade-promo-copy span{font-size:9px;color:#4c5663;line-height:1.45}
.upgrade-promo-btn{
  padding:7px 11px;background:#1877f2;color:#fff;border:2px solid var(--ink);
  border-radius:5px;font-size:10px;font-weight:800;white-space:nowrap;box-shadow:2px 2px 0 var(--ink);
}
.upgrade-promo-btn:active{transform:translate(2px,2px);box-shadow:none}

.upgrade-section-title{display:flex;align-items:center;gap:7px;margin:0 0 10px;padding-left:2px}
.upgrade-section-title > span{display:grid;place-items:center;font-size:13px;font-weight:900}
.upgrade-section-title .ico{width:14px;height:14px}
.upgrade-section-title h2{font-size:13px;font-weight:900}
.upgrade-section-title--compare{margin-top:24px}

.upgrade-plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:stretch}
.upgrade-plan{
  position:relative;display:flex;flex-direction:column;min-width:0;
  background:#fffbd2;color:#111;border:var(--bd) solid var(--ink);border-radius:6px;
  box-shadow:var(--sh);padding:13px 13px 12px;overflow:hidden;
}
.upgrade-plan--pink{background:#ffe7ee}
.upgrade-plan.is-current{outline:3px dashed var(--pink);outline-offset:-8px}
.upgrade-ribbon{
  position:absolute;top:0;right:0;padding:4px 9px;background:var(--pink);color:#fff;
  border-left:var(--bd) solid var(--ink);border-bottom:var(--bd) solid var(--ink);
  font-size:9px;font-weight:900;
}
.upgrade-plan-title{display:flex;gap:9px;align-items:center;padding-right:72px}
.upgrade-plan-icon{
  width:31px;height:31px;flex:0 0 31px;display:grid;place-items:center;
  background:var(--yellow);border:2px solid var(--ink);border-radius:4px;font-size:16px;font-weight:900;
}
.upgrade-plan--pink .upgrade-plan-icon{background:#ffc3d4}
.upgrade-plan-title h3{font-size:12px;font-weight:900;line-height:1.2}
.upgrade-plan-title span{font-size:9px;color:#444;line-height:1.35}
.upgrade-price{display:flex;align-items:baseline;gap:3px;margin:10px 0 7px;padding-bottom:7px;border-bottom:2px solid var(--ink)}
.upgrade-price strong{font-size:18px;font-weight:950;letter-spacing:-.5px}
.upgrade-price small{font-size:8px;font-weight:700}
.upgrade-features{list-style:none;display:flex;flex-direction:column;gap:5px;margin:0 0 12px;flex:1}
.upgrade-features li{display:flex;align-items:flex-start;gap:5px;font-size:9px;line-height:1.35;font-weight:600}
.upgrade-features li span{color:#0a9d4a;font-size:11px;line-height:1;font-weight:950}
.upgrade-buy{
  display:block;text-align:center;padding:8px 10px;background:var(--pink);color:#fff;
  border:var(--bd) solid var(--ink);border-radius:5px;box-shadow:var(--sh-sm);
  font-size:10px;font-weight:900;
}
.upgrade-buy:hover{filter:brightness(.97)}
.upgrade-buy:active{transform:translate(3px,3px);box-shadow:none}

.upgrade-table-wrap{overflow-x:auto;border:var(--bd) solid var(--ink);border-radius:6px;box-shadow:var(--sh);background:var(--paper)}
.upgrade-table{width:100%;min-width:650px;border-collapse:collapse;font-size:9px}
.upgrade-table th,.upgrade-table td{border-right:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink);padding:7px 8px;vertical-align:middle}
.upgrade-table th:last-child,.upgrade-table td:last-child{border-right:0}
.upgrade-table tbody tr:last-child td{border-bottom:1.5px solid var(--ink)}
.upgrade-table thead th{background:#f5f5f5;text-align:center;font-weight:900}
.upgrade-table thead th:first-child{width:42%;text-align:left}
.upgrade-table-plan--yellow{background:#fff7b5!important}
.upgrade-table-plan--pink{background:#ffcbd9!important}
.upgrade-table-plan strong{display:block;font-size:9px}
.upgrade-table-plan small{display:block;margin-top:1px;font-size:7px;font-weight:600}
.upgrade-table tbody tr:nth-child(even) td{background:rgba(255,220,185,.34)}
.upgrade-table tbody td:first-child{font-weight:600}
.upgrade-table-value{text-align:center;font-weight:700}
.compare-yes,.compare-no{
  display:inline-grid;place-items:center;width:15px;height:15px;border:1.5px solid var(--ink);
  border-radius:3px;font-size:10px;font-weight:950;line-height:1;
}
.compare-yes{background:#8ee6b0;color:#111}
.compare-no{background:#ffc6c6;color:#9d1b1b}
.upgrade-table tfoot td{background:var(--paper);border-bottom:0;padding:7px}
.upgrade-table-buy{
  display:block;text-align:center;background:var(--pink);color:#fff;border:2px solid var(--ink);
  border-radius:4px;padding:6px 4px;box-shadow:2px 2px 0 var(--ink);font-size:8px;font-weight:900;
}
.upgrade-table-buy:active{transform:translate(2px,2px);box-shadow:none}
.upgrade-note{text-align:center;color:var(--text-soft);font-size:10px;line-height:1.6;margin:16px auto 0;max-width:720px}
.upgrade-note code{font-size:9px;padding:2px 4px;background:var(--surface-2);border:1px solid var(--ink);border-radius:3px}

html[data-mode="dark"] .upgrade-plan{background:#302d20;color:var(--ink)}
html[data-mode="dark"] .upgrade-plan--pink{background:#351f27}
html[data-mode="dark"] .upgrade-promo{background:#182c40}
html[data-mode="dark"] .upgrade-promo-copy span{color:#b7c1cc}
html[data-mode="dark"] .upgrade-table thead th{background:#26262d}
html[data-mode="dark"] .upgrade-table tbody tr:nth-child(even) td{background:rgba(255,190,130,.08)}

@media (max-width:700px){
  .upgrade-page{padding-top:0}
  .upgrade-head h1{font-size:23px}
  .upgrade-promo{grid-template-columns:auto 1fr;gap:9px}
  .upgrade-promo-btn{grid-column:1/-1;text-align:center}
  .upgrade-plans{grid-template-columns:1fr;gap:14px}
  .upgrade-plan{box-shadow:3px 3px 0 var(--ink)}
  .upgrade-table-wrap{margin-right:-2px}
}
@media (max-width:420px){
  .upgrade-head p{font-size:10px}
  .upgrade-promo-copy strong{font-size:11px}
  .upgrade-promo-copy span{font-size:8px}
  .upgrade-plan-title h3{font-size:11px}
  .upgrade-price strong{font-size:17px}
}