/* Lernpfad — hệ thống giao diện theo thiết kế Genspark Design (tokens + thành phần). Mobile-first, không framework. */
:root{
  --text:#1d2433; --text-2:#4a5468; --text-3:#7a8396;
  --bg:#f6f4ef; --surface:#ffffff; --surface-2:#f0ede6; --border:#e3dfd5;
  --primary:#1f3a5f; --primary-2:#2d5288; --primary-soft:#e6edf7;
  --accent:#d98a1f; --accent-soft:#fbefdc;
  --ok:#2f7a4a; --ok-soft:#e3f3e8;
  --info:#2d6a8f; --info-soft:#e3f0f7;
  --warn:#a86a00; --warn-soft:#fff3d6;
  --err:#b23b3b; --err-soft:#fbe7e7;
  --sample:#6b4fa0; --sample-soft:#efeaf8;
  --de:#c0392b; --en:#2c6fbb;
  --r-card:14px; --r-ctl:9px;
  --shadow:0 1px 2px rgba(29,36,51,.05),0 4px 16px rgba(29,36,51,.05);
  --focus:0 0 0 3px var(--accent);
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --nav-h:68px; --side-w:248px; --content-w:920px; --content-wide:1240px;
  /* bí danh cho mã cũ */
  --ink:var(--text); --ink-2:var(--text-2); --ink-3:var(--text-3); --line:var(--border);
  --bad:var(--err); --bad-soft:var(--err-soft); --radius:var(--r-card); --radius-sm:var(--r-ctl);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--font);color:var(--text);background:var(--bg);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}
a{color:var(--primary-2)}
button,input,select,textarea{font:inherit;color:inherit}
img{max-width:100%}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px}
.skip{position:absolute;left:-999px;top:0;background:var(--primary);color:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px;top:8px}
.boot{padding:40vh 0;text-align:center;color:var(--text-3)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ============ Khung ============ */
.brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:18px;letter-spacing:-.01em;color:var(--primary);text-decoration:none}
.brand-logo{width:30px;height:30px;border-radius:8px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800;font-size:16px;flex:none}
.app-header{position:sticky;top:0;z-index:30;background:var(--bg);border-bottom:1px solid var(--border)}
.app-header .bar{height:60px;display:flex;align-items:center;gap:12px;padding:0 16px}
.header-spacer{flex:1}
.lang-switch{display:inline-flex;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:3px;gap:2px}
.lang-switch button{white-space:nowrap;border:0;background:transparent;height:32px;padding:0 11px;border-radius:999px;font-size:14px;font-weight:600;color:var(--text-2);cursor:pointer;display:inline-flex;align-items:center;gap:5px}
.lang-switch button[aria-pressed="true"]{background:var(--surface);color:var(--text);box-shadow:0 1px 2px rgba(29,36,51,.12)}
.icon-btn{border:1px solid var(--border);background:var(--surface);border-radius:9px;width:40px;height:40px;display:grid;place-items:center;cursor:pointer;color:var(--text-2);font-size:16px}
.icon-btn:hover{background:var(--surface-2)}
.layout{display:block}
.main{min-width:0;width:100%;padding:16px 16px calc(var(--nav-h) + 28px);max-width:var(--content-w);margin:0 auto}
.main.wide{max-width:var(--content-wide)}
.side-nav{display:none}
.nav-ico{width:22px;height:22px;flex:none;display:inline-grid;place-items:center}
.nav-ico svg{width:22px;height:22px}

/* Thanh dưới (mobile) */
.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:var(--nav-h);display:grid;grid-template-columns:repeat(5,1fr);background:var(--surface);border-top:1px solid var(--border);padding-bottom:calc(6px + env(safe-area-inset-bottom));z-index:30}
.bottom-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11.5px;font-weight:600;color:var(--text-3);text-decoration:none;position:relative}
.bottom-nav a[aria-current="page"]{color:var(--primary)}
.bottom-nav a[aria-current="page"]::before{content:"";position:absolute;top:0;left:30%;right:30%;height:3px;border-radius:0 0 3px 3px;background:var(--primary)}
.badge-dot{position:absolute;top:9px;left:calc(50% + 6px);min-width:16px;height:16px;border-radius:8px;background:var(--accent);color:#3d2400;font-size:10.5px;font-weight:700;display:grid;place-items:center;padding:0 4px}
.menu-sheet nav a{display:flex;align-items:center;gap:12px;min-height:48px;padding:0 10px;text-decoration:none;color:var(--text);border-radius:9px;font-weight:600}
.menu-sheet nav a:hover{background:var(--surface-2)}
.menu-sheet nav a svg{width:22px;height:22px;color:var(--text-2)}

/* Thanh bên (desktop) */
@media (min-width:900px){
  .app-header{display:none}
  .layout{display:grid;grid-template-columns:var(--side-w) minmax(0,1fr);min-height:100vh}
  .side-nav{display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow:auto;background:var(--surface);border-right:1px solid var(--border);padding:20px 14px}
  .side-nav .brand{padding:0 8px 18px}
  .side-nav .lang-switch{margin:0 4px 18px;align-self:flex-start}
  .side-nav a.nav{display:flex;align-items:center;gap:12px;height:44px;padding:0 12px;border-radius:9px;color:var(--text-2);text-decoration:none;font-weight:600;font-size:15px}
  .side-nav a.nav:hover{background:var(--surface-2)}
  .side-nav a.nav[aria-current="page"]{background:var(--primary-soft);color:var(--primary)}
  .side-nav .count{margin-left:auto;font-size:12px;font-weight:700;background:var(--accent-soft);color:#7a4a0c;border-radius:999px;padding:1px 8px}
  .side-nav .sep{border-top:1px solid var(--border);margin:10px 8px}
  .side-nav .me{margin-top:auto;display:flex;align-items:center;gap:10px;padding:12px 8px 0;border-top:1px solid var(--border);font-size:14px}
  .side-nav .me .av{width:34px;height:34px;border-radius:50%;background:var(--surface-2);display:grid;place-items:center;font-weight:700;color:var(--text-2);flex:none}
  .side-nav .me small{display:block;color:var(--text-3);font-size:12.5px}
  .side-nav .me .who{min-width:0;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .main{padding:28px 40px 48px}
  .bottom-nav,.menu-toggle{display:none!important}
}

/* ============ Kiểu chữ ============ */
h1,h2,h3{line-height:1.25;letter-spacing:-.01em;margin:0 0 .5em;font-weight:750}
h1{font-size:26px;letter-spacing:-.015em} h2{font-size:19px} h3{font-size:16.5px;font-weight:700}
p{margin:0 0 .75em}
.muted{color:var(--text-3)} .small{font-size:14.5px} .tiny{font-size:12.5px}
.page-head{margin-bottom:16px}
.page-head h1{margin:0 0 4px}
.page-head .kicker,.kicker{font-size:12.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--text-3);margin:0 0 6px}
.sec-title{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-3);margin:0 0 10px}
.fl{font-weight:600}

/* ============ Thẻ & bố cục ============ */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);padding:16px;box-shadow:var(--shadow)}
.card + .card,.stack > * + *{margin-top:14px}
.grid{display:grid;gap:14px}
@media (min-width:640px){.grid.cols-2{grid-template-columns:1fr 1fr}.grid.cols-3{grid-template-columns:repeat(3,1fr)}}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row.between{justify-content:space-between}

/* ============ Nút ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 18px;border-radius:var(--r-ctl);font:650 16px var(--font);border:1px solid transparent;cursor:pointer;text-decoration:none;white-space:nowrap;transition:background .15s}
.btn:active{transform:translateY(1px)}
.btn[disabled],.btn[aria-disabled="true"]{background:var(--surface-2)!important;color:#a3a9b5!important;border-color:var(--border)!important;cursor:not-allowed}
.btn-primary{background:var(--primary);color:#fff} .btn-primary:hover{background:var(--primary-2)}
.btn-accent{background:var(--accent);color:#2e1b00} .btn-accent:hover{background:#e3962e}
.btn-ghost{background:var(--surface);color:var(--primary);border-color:#cfd6e2} .btn-ghost:hover{background:var(--primary-soft)}
.btn-quiet{background:transparent;color:var(--text-2);font-weight:550;text-decoration:underline;text-underline-offset:3px;text-decoration-color:#c6c1b5;padding:0 10px;min-height:40px}
.btn-quiet:hover{color:var(--text)}
.btn-danger{background:var(--err);color:#fff}
.btn-sm{min-height:40px;font-size:14px;padding:0 14px}
.btn-quiet.btn-sm{padding:0 8px;min-height:36px}
.btn-block{width:100%}
.btn .tiny{font-weight:500}

/* ============ Chip ============ */
.chip{display:inline-flex;align-items:center;gap:6px;min-height:24px;padding:2px 9px;border-radius:999px;font-size:12.5px;font-weight:600;white-space:nowrap;line-height:1.2;background:var(--surface-2);color:var(--text-2);border:0}
.chip.ok{background:var(--ok-soft);color:var(--ok)}
.chip.warn,.chip.focus{background:var(--accent-soft);color:#7a4a0c}
.chip.bad{background:var(--err-soft);color:var(--err)}
.chip.info{background:var(--info-soft);color:var(--info)}
.chip.primary{background:var(--primary-soft);color:var(--primary)}
.chip.sample{background:var(--sample-soft);color:var(--sample)}
.chip.lang-de,.chip.lang-en{background:var(--surface-2);color:var(--text-2)}
.chip.lang-de::before,.chip.lang-en::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--de)}
.chip.lang-en::before{background:var(--en)}
button.chip{cursor:pointer}

/* Mức thành thạo — 6 bậc, không phần trăm */
.mastery{display:inline-flex;align-items:center;gap:7px;height:26px;padding:0 10px 0 8px;border-radius:999px;font-size:12.5px;font-weight:650;background:var(--surface);border:1px solid var(--border);color:var(--text-2);white-space:nowrap}
.mastery .mbars{display:inline-flex;gap:2px;align-items:flex-end}
.mastery .mbars i{width:4px;border-radius:1px;background:#dcd7cb}
.mastery .mbars i:nth-child(1){height:6px}.mastery .mbars i:nth-child(2){height:8px}.mastery .mbars i:nth-child(3){height:10px}.mastery .mbars i:nth-child(4){height:12px}.mastery .mbars i:nth-child(5){height:14px}
.mastery .mbars i.on{background:var(--primary-2)}
.mastery.m-new{border-style:dashed;color:var(--text-3)}
.mastery.m-stable{background:var(--primary-soft);border-color:#c9d6ea;color:var(--primary)}
.mastery.m-stable .mbars i.on{background:var(--primary)}

/* ============ Ô nhập ============ */
.field{display:block;margin-bottom:16px}
.field > span{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--text)}
.input,select.input,textarea.input{width:100%;min-height:46px;padding:10px 14px;border:1px solid #d3cec2;border-radius:var(--r-ctl);background:var(--surface);font-size:16px;color:var(--text)}
.input::placeholder{color:#a3a9b5}
.input:focus{outline:none;border-color:var(--accent);box-shadow:var(--focus)}
.input[aria-invalid="true"]{border-color:var(--err)}
textarea.input{min-height:120px;resize:vertical;line-height:1.5}
textarea.code{font-family:var(--mono);font-size:13px;line-height:1.6;min-height:240px;background:#fbfaf6;white-space:pre}
.pw-wrap{position:relative}
.pw-wrap .input{padding-right:64px}
.pw-wrap .reveal{position:absolute;right:4px;top:4px;height:38px;min-width:52px;border:0;background:transparent;border-radius:7px;font:600 13px var(--font);color:var(--primary-2);cursor:pointer}
.pw-wrap .reveal:hover{background:var(--surface-2)}
.check{display:flex;gap:10px;align-items:flex-start;padding:6px 0;cursor:pointer}
.check input{width:20px;height:20px;margin-top:2px;flex:none;accent-color:var(--primary-2)}

/* Thông báo */
.notice{display:block;border-radius:10px;padding:10px 12px;background:var(--info-soft);color:#1e4a63;font-size:14.5px;border:1px solid #c5dfee}
.notice.warn{background:var(--warn-soft);color:#6e4600;border-color:#f0d99c}
.notice.bad{background:var(--err-soft);color:#7a2323;border-color:#f0c6c6}
.notice.ok{background:var(--ok-soft);color:#1e5232;border-color:#bfe0ca}
.notice.sample{background:var(--sample-soft);color:#3e2c63;border-color:#dcd1ef}
.err-text{color:var(--err);font-size:14px;margin:0 0 12px;background:var(--err-soft);border:1px solid #f0c6c6;border-radius:10px;padding:10px 12px;font-weight:600}
.err-text[hidden]{display:none}

/* Trống / tải */
.empty{text-align:center;padding:28px 20px;color:var(--text-2)}
.empty .big{width:72px;height:72px;margin:0 auto 14px;border-radius:18px;background:var(--surface-2);border:1px dashed #cfc9bb;display:grid;place-items:center;font-size:30px}
.empty h3{font-size:19px;font-weight:750;margin:0 0 6px;color:var(--text)}
.empty p{color:var(--text-2);margin:0 auto 16px;max-width:340px;font-size:15px}
.skeleton{background:linear-gradient(90deg,#eceae4 25%,#f5f3ee 37%,#eceae4 63%);background-size:400% 100%;animation:sk 1.3s ease infinite;border-radius:10px;height:18px;margin:10px 0}
@keyframes sk{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* Thanh tiến trình & bước */
.progress{height:6px;background:#e4e0d6;border-radius:99px;overflow:hidden}
.progress > i{display:block;height:100%;background:var(--primary-2);border-radius:99px;transition:width .3s}
.stepbar{display:flex;gap:4px;align-items:center}
.stepbar span{flex:1;height:5px;border-radius:3px;background:#dcd7cb}
.stepbar span.done{background:var(--primary-2)}
.stepbar span.cur{background:var(--accent);height:7px}

/* Tab dạng viên */
.tabs{display:flex;gap:6px;overflow-x:auto;margin:0 0 16px;padding:0 0 2px;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs button,.tabs a{flex:none;display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 14px;border-radius:999px;border:1px solid var(--border);background:var(--surface);font:600 14px var(--font);color:var(--text-2);cursor:pointer;white-space:nowrap;text-decoration:none}
.tabs [aria-selected="true"]{background:var(--primary);color:#fff;border-color:var(--primary)}
/* Tab phân đoạn (hội thoại) */
.seg-tabs{display:grid;grid-template-columns:repeat(3,1fr);background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:3px;margin-bottom:12px;gap:0}
.seg-tabs button{border:0;background:transparent;min-height:38px;border-radius:7px;font-size:13.5px;font-weight:600;color:var(--text-2);cursor:pointer;padding:0 6px}
.seg-tabs button[aria-selected="true"]{background:var(--surface);color:var(--text);box-shadow:0 1px 2px rgba(29,36,51,.12)}

/* Bảng & danh sách */
table.table{width:100%;border-collapse:collapse;font-size:14.5px}
.table th{text-align:left;font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--text-3);padding:8px 10px;border-bottom:1px solid var(--border)}
.table td{padding:10px;border-bottom:1px solid #efece5;vertical-align:top}
.table-wrap{overflow-x:auto}
.list-item{display:flex;align-items:center;gap:12px;padding:12px 4px;border-bottom:1px solid #efece5;text-decoration:none;color:inherit}
.list-item:last-child{border-bottom:0}
a.list-item:hover,button.list-item:hover{background:#fbfaf6}

/* ============ Hôm nay ============ */
.hero{background:var(--primary);color:#fff;border-radius:16px;padding:18px 18px 16px}
.hero h1{color:#fff;font-size:26px;margin:2px 0 14px}
.hero .lang{font-size:13px;font-weight:600;color:#b9c8de;display:flex;align-items:center;gap:6px;margin:0}
.hero .lang i{width:8px;height:8px;border-radius:50%;background:#e8806f}
.hero .lang.en i{background:#8fb5e6}
.hero .muted{color:#cfd9e8}
.hero .stats{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.stat{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:10px 12px;text-decoration:none;color:#fff;display:block}
a.stat:hover{background:rgba(255,255,255,.13)}
.stat b{display:block;font-size:30px;font-weight:750;line-height:1.1;letter-spacing:-.02em}
.stat span{font-size:13.5px;color:#d3ddeb;line-height:1.35;display:block;margin-top:2px}
.card .stat,.admin-stat .stat{background:transparent;border:0;color:var(--text);padding:0}
.card .stat span{color:var(--text-2)}
.calm{display:flex;gap:10px;align-items:flex-start;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:12px 14px;font-size:15px;color:#e5ebf4;margin-bottom:10px}
.calm .ok{width:20px;height:20px;border-radius:50%;background:#cfe9d8;color:var(--ok);font-weight:800;font-size:12px;display:grid;place-items:center;flex:none;margin-top:1px}
.sessions{display:grid;gap:8px}
.sess{display:flex;align-items:center;gap:12px;border-radius:12px;padding:12px 14px;text-align:left;border:1.5px solid transparent;width:100%;min-height:60px;text-decoration:none}
.sess .em{font-size:20px;line-height:1;flex:none}
.sess b{display:block;font-size:16px;font-weight:700}
.sess small{display:block;font-size:13.5px;line-height:1.35}
.sess .arr{margin-left:auto;font-size:18px;opacity:.7}
.sess.quick{background:var(--accent);color:#2e1b00} .sess.quick small{color:#4f3200} .sess.quick:hover{background:#e3962e}
.sess.full{background:transparent;border-color:rgba(255,255,255,.4);color:#fff} .sess.full small{color:#cfd9e8} .sess.full:hover{background:rgba(255,255,255,.08)}
.sess.fix{background:transparent;border:1.5px dashed rgba(255,255,255,.4);color:#fff} .sess.fix small{color:#cfd9e8}
@media (min-width:900px){
  .hero{padding:24px 26px;display:grid;grid-template-columns:1fr 1fr;gap:12px 28px;align-items:end}
  .hero h1{font-size:28px;margin-bottom:0}
  .hero .stats{margin:0;grid-row:span 2}
  .hero .calm{margin:0;grid-row:span 2}
  .hero .sessions{grid-column:1/-1;grid-template-columns:1fr 1fr;margin-top:6px}
  .hero .hero-note{grid-column:1/-1}
  .today-grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:20px;align-items:start;margin-top:20px}
  .today-grid > *{margin-top:0!important}
  .today-grid .span{grid-column:1/-1}
}
.resume .k{font-size:13px;color:var(--text-3);font-weight:600;margin-bottom:4px}
.resume h2{font-size:19px;margin:0}
.resume .sub{font-size:14px;color:var(--text-2);margin:2px 0 0}
.resume .r{display:flex;align-items:center;gap:14px;margin-top:14px}
.resume .r .stepbar{flex:1}
.course{padding:0;overflow:hidden}
.course-h{padding:16px 16px 12px;border-bottom:1px solid var(--border)}
.course-h .top{display:flex;gap:8px;align-items:center;margin-bottom:6px;flex-wrap:wrap}
.course-h h2{margin:0}
.chap{padding:12px 16px 6px;display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.chap b{font-size:15px}
.chap span{font-size:13px;color:var(--text-3)}
.chap-story{padding:0 16px;font-size:14px;color:var(--text-2);margin:0 0 6px}
.chap-goals{padding:0 16px;margin:0 0 4px}
.chap-goals summary{font-size:13.5px;color:var(--text-2);cursor:pointer;min-height:32px;display:flex;align-items:center}
.lessons{padding:0 8px 8px}
.lesson-row{display:grid;grid-template-columns:32px 1fr auto;gap:12px;align-items:center;padding:11px 8px;border-radius:10px;text-decoration:none;color:inherit;position:relative}
.lesson-row:hover{background:var(--surface-2)}
.lesson-row + .lesson-row{border-top:1px solid #efece5}
.lesson-num{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-size:14px;font-weight:700;background:var(--surface-2);color:var(--text-2)}
.lesson-row .ti{font-weight:650;font-size:15.5px;line-height:1.3;display:block}
.lesson-row .go{font-size:13.5px;color:var(--text-2);display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.4}
.lesson-row .mm{font-size:12.5px;color:var(--text-3);margin-top:2px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.lesson-row .stt{font-size:12.5px;font-weight:600}
.stt.done{color:var(--ok)} .stt.doing{color:var(--primary-2)} .stt.todo{color:var(--text-3)}
.lesson-row .chev{color:var(--text-3)}
.lesson-row .tag{font-size:11.5px;font-weight:700;color:#7a4a0c;background:#f6dcb3;border-radius:999px;padding:1px 8px}
.lesson-row.done .lesson-num{background:var(--ok-soft);color:var(--ok)}
.lesson-row.doing .lesson-num{background:var(--primary-soft);color:var(--primary)}
.lesson-row.current{background:var(--accent-soft)}
.lesson-row.current + .lesson-row{border-top-color:transparent}
.lesson-row.current .lesson-num{background:var(--accent);color:#2e1b00}
.lesson-row.epilogue.locked{opacity:.8;cursor:default}
.lesson-row.epilogue.locked:hover{background:transparent}
.chap-actions{display:flex;gap:8px;flex-wrap:wrap;padding:6px 16px 16px}
details.epilogue{margin:4px 16px 8px;padding:12px 14px}
details.epilogue > summary{cursor:pointer}
.plan-steps{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.plan-steps .list-item{gap:12px;border-radius:10px;padding:10px 8px}

/* ============ Trình phát bài học ============ */
.player{width:100%;margin:0;padding-bottom:24px}
.player-top{position:sticky;top:60px;z-index:5;background:var(--bg);padding:8px 0 12px;border-bottom:1px solid var(--border);margin:-16px -16px 16px;padding-left:16px;padding-right:16px}
@media (min-width:900px){.player-top{top:0;margin:-28px 0 16px;padding:14px 0 12px}}
.player-top h1{font-size:21px;margin:2px 0 10px}
.player-top .back,.back-link{display:inline-flex;align-items:center;gap:6px;min-height:40px;color:var(--primary-2);font-weight:600;font-size:14px;text-decoration:none;margin-left:-6px;padding:0 6px;border-radius:8px}
.step-dots{display:flex;gap:4px;margin-top:8px}
.step-dots button{flex:1;height:5px;border:0;border-radius:3px;background:#dcd7cb;cursor:pointer;padding:0}
.step-dots button.done{background:var(--primary-2)}
.step-dots button.cur{background:var(--accent);height:7px}
.step-kind{font-size:12.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--text-3);margin:0 0 6px}
.goal-box{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:0 14px;box-shadow:none}
.goal-box summary{list-style:none;cursor:pointer;min-height:44px;display:flex;align-items:center;gap:8px;font-size:14.5px;color:var(--text-2)}
.goal-box summary::-webkit-details-marker{display:none}
.goal-box summary::after{content:"▾";margin-left:auto;color:var(--text-3)}
.goal-box[open] summary::after{transform:rotate(180deg)}
.goal-box summary b{color:var(--text)}
.goal-box[open]{padding-bottom:12px}
#step{padding:18px 16px}
#step h2{font-size:20px}
.prose{font-size:17px}.prose p{margin-bottom:.8em}.prose ul{padding-left:20px;margin:0 0 .8em}
.mark{font:inherit;font-weight:650;color:var(--text);background:none;border:0;padding:0 1px;cursor:pointer;border-radius:3px;text-decoration:underline dotted var(--accent);text-decoration-thickness:2px;text-underline-offset:4px}
.mark:hover{background:var(--accent-soft)}
.src{font-weight:550}
.tts-note{display:flex;gap:8px;align-items:flex-start;font-size:13px;color:var(--text-2);background:var(--surface-2);border-radius:9px;padding:8px 10px;margin-bottom:14px}
.tts-note .i{width:16px;height:16px;border-radius:50%;background:var(--info);color:#fff;font-size:11px;font-weight:800;display:grid;place-items:center;flex:none;margin-top:1px}
.dialogue{display:grid;gap:10px}
.dialogue .line{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:10px 12px 6px;display:block}
.dialogue .line:nth-child(even){background:#fbfaf6;border-color:#e8e3d6}
.speaker{display:flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;color:var(--text-3);letter-spacing:.02em;margin-bottom:2px}
.speaker::before{content:attr(data-initial);width:18px;height:18px;border-radius:50%;display:grid;place-items:center;font-size:10px;color:#fff;background:#8a93a5}
.dialogue .line:nth-child(even) .speaker::before{background:var(--primary-2)}
.line .src{font-size:16.5px;line-height:1.45}
.line .tr{font-size:14px;color:var(--text-3);margin-top:2px}
.hide-tr .tr{display:none}
.hide-text .src{filter:blur(5px)} .hide-text .src:hover{filter:none}
.line-tools{display:flex;gap:2px;margin:4px -6px 0;flex-wrap:wrap}
.line-tools .btn-quiet{text-decoration:none;color:var(--primary-2);font-weight:600;font-size:13px}
.line-tools .btn-quiet:hover{background:var(--primary-soft)}
.word-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:4px;min-width:0;font:inherit;text-decoration:none;color:inherit}
button.word-card{cursor:pointer;text-align:left}
button.word-card:hover{border-color:#cdc6b6;background:#fffdf8}
.word-card .lemma{font-size:17px;font-weight:700;line-height:1.25}
.gram{font-size:13px;color:var(--text-2);font-family:var(--mono)}
.sticky-actions{position:sticky;bottom:calc(var(--nav-h) + 8px);z-index:4;margin-top:16px;display:flex;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:10px;box-shadow:0 -2px 14px rgba(29,36,51,.06)}
.sticky-actions .btn-primary{flex:1}
@media (min-width:900px){.sticky-actions{bottom:12px}}
.preview-banner{background:var(--primary);color:#fff;display:flex;align-items:center;gap:10px;padding:8px 14px;font-size:13.5px;font-weight:600;border-radius:10px;margin-bottom:12px;flex-wrap:wrap}
.preview-banner a{color:#fff;margin-left:auto;font-weight:700}

/* ============ Hoạt động & phản hồi ============ */
.activity .prompt,.prompt{font-size:19px;font-weight:700;line-height:1.35;margin:0 0 16px}
.opt{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;background:var(--surface);border:1.5px solid var(--border);border-radius:12px;padding:14px;cursor:pointer;margin-bottom:8px;min-height:56px;color:var(--text);flex-wrap:wrap}
.opt:hover:not(:disabled){border-color:#c9c3b5}
.opt[aria-pressed="true"]{border-color:var(--primary-2);background:var(--primary-soft)}
.opt.correct{border:2px solid var(--ok);background:var(--surface)}
.opt.correct::after{content:"✓ Đáp án đúng";font-size:12.5px;font-weight:700;color:var(--ok);margin-left:auto}
.opt.wrong{border-color:#e7b3b3;background:var(--err-soft)}
.opt.wrong::after{content:"✕ Bạn đã chọn";font-size:12.5px;font-weight:700;color:var(--err);margin-left:auto}
.opt:disabled{cursor:default}
.cloze-text{font-size:18px;line-height:2.4;font-weight:550;margin:0 0 14px}
.blank{display:inline-block;min-width:96px;width:auto;height:38px;padding:0 10px;margin:0 2px;vertical-align:middle;border:0;border-bottom:2px solid #b9b3a5;background:var(--surface-2);border-radius:8px 8px 2px 2px;font-weight:650}
.blank:focus{outline:none;border-color:var(--accent);box-shadow:var(--focus)}
.blank.ok{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}
.blank.bad{background:var(--err-soft);border-color:var(--err);color:var(--err)}
.token-area{min-height:56px;border:1.5px dashed #cfc9bb;border-radius:12px;padding:8px;display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px;background:#fbfaf6}
.token{min-height:44px;padding:0 14px;border-radius:9px;border:1px solid #d3cec2;background:var(--surface);font-weight:600;font-size:16px;cursor:pointer;color:var(--text);box-shadow:0 1px 0 #e3dfd5;display:inline-flex;align-items:center}
.token:hover{border-color:var(--primary-2)}
.token.used{opacity:.35;pointer-events:none;box-shadow:none;border-style:dashed}
.match-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-items:center;margin-bottom:8px}
.match-row .left{font-weight:650}
[data-typing],.flash + .input,.bigin{height:56px;font-size:20px;font-weight:600}
[data-char]{min-width:44px}
.act-actions{gap:8px}
.feedback{margin-top:16px;border-radius:12px;border:1px solid var(--border);padding:14px 16px;font-size:15px;background:var(--surface)}
.feedback .verdict{display:flex;align-items:center;gap:8px;font-weight:750;font-size:17px;margin-bottom:6px}
.feedback p{margin:0 0 8px}
.feedback.correct{background:var(--ok-soft);border-color:#bfe0ca}.feedback.correct .verdict{color:var(--ok)}
.feedback.hinted{background:var(--info-soft);border-color:#c5dfee}.feedback.hinted .verdict{color:var(--info)}
.feedback.partial{background:var(--warn-soft);border-color:#f0d99c}.feedback.partial .verdict{color:var(--warn)}
.feedback.wrong{background:var(--err-soft);border-color:#f0c6c6}.feedback.wrong .verdict{color:var(--err)}
.feedback.revealed{background:var(--surface-2);border-color:var(--border)}.feedback.revealed .verdict{color:var(--text-2)}
.feedback.submitted{background:var(--surface);border-style:dashed;border-color:#c9c3b5}.feedback.submitted .verdict{color:var(--text-2)}
.effects{display:grid;gap:4px;margin-top:10px;padding-top:10px;border-top:1px solid rgba(29,36,51,.1);font-size:14px;color:var(--text-2)}
.hint-box{background:var(--accent-soft);border:1px solid #f0d3a6;border-radius:10px;padding:10px 12px;font-size:15px;color:#5e3a07;margin-top:12px}
.hint-box + .hint-box{margin-top:6px}
.feedback{scroll-margin-bottom:calc(var(--nav-h) + 90px);scroll-margin-top:140px}

/* ============ Ôn tập & thẻ ============ */
.reason{font-size:12.5px;font-weight:600;color:var(--text-2);display:inline-flex;align-items:center;gap:6px;text-transform:none;letter-spacing:0}
.reason::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.rtype{font-size:12px;font-weight:700;padding:3px 8px;border-radius:6px;white-space:nowrap}
.rtype.self{background:var(--surface-2);color:var(--text-2);border:1px dashed #c9c3b5}
.rtype.auto{background:var(--primary-soft);color:var(--primary)}
.flash{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:22px 18px;margin:10px 0 14px;box-shadow:var(--shadow);text-align:center;min-height:200px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px}
.flash.self-face{background:repeating-linear-gradient(0deg,#fdfcf8 0 31px,#f1ede3 31px 32px);border:1.5px dashed #c9c3b5;box-shadow:none;min-height:280px}
.flash .big{font-size:34px;font-weight:750;letter-spacing:-.02em}
.flash .meaning{font-size:22px;font-weight:700}
.flash .qlab{font-size:12.5px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-3)}
.flash hr{border:0;border-top:1px solid #e3dfd5;width:100%;margin:8px 0}
.self-grade{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.self-grade .btn{flex-direction:column;gap:2px;min-height:64px;padding:8px 6px;font-size:14.5px;line-height:1.25;white-space:normal;background:var(--surface);color:var(--text);border:1.5px solid var(--border);border-radius:12px}
.self-grade .btn:hover{background:var(--surface-2)}
.self-grade .btn span{font-size:14px;font-weight:700}
.self-grade .btn:nth-child(1){border-top:4px solid #c9c3b5}
.self-grade .btn:nth-child(2){border-top:4px solid #9bb0cc}
.self-grade .btn:nth-child(3){border-top:4px solid var(--primary-2)}
.self-note{font-size:13px;color:var(--text-2);margin-top:10px;text-align:center}
.my-note{background:var(--accent-soft);border-radius:9px;padding:8px 10px;margin:8px 0 0;color:#5e3a07;text-align:left}
.diff{font-size:17px;line-height:1.9}
.diff .d-ok{color:var(--text)}
.diff .d-miss{color:var(--ok);text-decoration:underline 2px;text-underline-offset:3px;font-weight:650}
.diff .d-extra{color:var(--err);text-decoration:line-through}
.tally{display:grid;gap:8px;margin:10px 0 14px;text-align:left}
.tally .t{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 12px;font-size:15px}
.tally .t .b{width:24px;height:24px;border-radius:6px;display:grid;place-items:center;font-size:13px;font-weight:800;flex:none}
.tally .t .n{margin-left:auto;font-weight:750;font-size:17px}
.tally .ok .b{background:var(--ok-soft);color:var(--ok)}
.tally .as .b{background:var(--info-soft);color:var(--info)}
.tally .er .b{background:var(--err-soft);color:var(--err)}
.tally .sf{border-style:dashed}
.tally .sf .b{background:var(--surface-2);color:var(--text-2)}
.speak-card{gap:6px}

/* ============ Kho từ & thẻ từ ============ */
.search-box{position:relative}
.search-box .input{height:48px;padding-left:42px}
.search-box .mg{position:absolute;left:14px;top:14px;width:20px;height:20px;color:var(--text-3);pointer-events:none}
.rel-group{margin-bottom:12px}
.rel-group h4{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:650;margin:0 0 6px}
.rel-group h4 .ri{width:22px;height:22px;border-radius:6px;background:var(--surface-2);color:var(--text-2);display:grid;place-items:center;font-size:12.5px;font-weight:800;flex:none}
.rel-chip{display:inline-flex;flex-direction:column;align-items:flex-start;gap:1px;min-height:40px;padding:8px 12px;border-radius:9px;border:1px solid #d8cdb8;background:var(--surface);margin:0 6px 6px 0;text-decoration:none;color:var(--text);max-width:100%}
.rel-chip b{font-weight:650;font-size:15px;text-decoration:underline dotted var(--accent);text-decoration-thickness:2px;text-underline-offset:4px}
.rel-chip small{font-size:13px;color:var(--text-2)}
.rel-chip:hover{background:var(--accent-soft)}
.skill-bars{display:grid;gap:0}
.skill{display:grid;grid-template-columns:110px 1fr;gap:10px;align-items:center;font-size:14px;padding:8px 0}
.skill + .skill{border-top:1px solid #efece5}
.wlabel{font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-3);margin:14px 0 8px}
.sheet .w-title .lemma{font-size:30px;font-weight:750;letter-spacing:-.02em;line-height:1.15}

/* ============ Sheet / modal ============ */
.overlay{position:fixed;inset:0;background:rgba(29,36,51,.38);z-index:50;display:flex;align-items:flex-end;justify-content:center;animation:fade .15s}
@keyframes fade{from{opacity:0}}
.sheet{background:var(--surface);width:100%;max-width:560px;max-height:88vh;overflow:auto;border-radius:20px 20px 0 0;padding:28px 20px calc(18px + env(safe-area-inset-bottom));position:relative;box-shadow:0 -8px 30px rgba(29,36,51,.18);animation:up .25s ease-out}
.sheet::before{content:"";position:absolute;top:10px;left:50%;transform:translateX(-50%);width:40px;height:5px;border-radius:3px;background:#d6d1c5}
@keyframes up{from{transform:translateY(40px)}}
@media (min-width:700px){.overlay{align-items:center}.sheet{border-radius:16px;padding-top:22px;box-shadow:0 18px 50px rgba(29,36,51,.22)}.sheet::before{display:none}}
.sheet-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:8px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.sheet-head .icon-btn{border:0;background:transparent;font-size:18px}
.toast-wrap{position:fixed;left:0;right:0;bottom:calc(var(--nav-h) + 12px);display:flex;flex-direction:column;align-items:center;gap:8px;z-index:60;pointer-events:none}
@media (min-width:900px){.toast-wrap{bottom:20px;left:var(--side-w)}}
.toast{background:var(--text);color:#fff;padding:10px 16px;border-radius:10px;font-size:14.5px;font-weight:550;box-shadow:var(--shadow);pointer-events:auto;max-width:92vw}
.toast.bad{background:var(--err)}.toast.ok{background:var(--ok)}
.outbox-bar{background:var(--warn-soft);color:#6e4600;padding:8px 16px;font-size:14px;text-align:center;border-bottom:1px solid #f0d99c}

/* ============ Ghi âm ============ */
.rec{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}
.rec .dot,.shadow-box .dot{width:12px;height:12px;border-radius:50%;background:var(--err);animation:pulse 1s infinite;display:inline-block}
@keyframes pulse{50%{opacity:.3}}
audio{max-width:100%;height:38px}
.shadow-box{margin-top:8px;padding:10px 12px;border:1px dashed #c9c3b5;border-radius:12px;background:#fbfaf6}
.shadow-box .seg{display:inline-flex;gap:4px}

/* ============ Biểu đồ đơn giản ============ */
.bars{display:flex;align-items:flex-end;gap:4px;height:90px}
.bars i{flex:1;background:var(--primary-soft);border-radius:4px 4px 0 0;min-height:2px;position:relative}
.stackbar{display:flex;height:14px;border-radius:99px;overflow:hidden;background:var(--surface-2)}
.stackbar i{display:block;height:100%}
.legend{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;margin-top:8px}
.legend span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:5px;background:var(--c);vertical-align:-1px}
.big-num{font-size:30px;font-weight:750;line-height:1.1;letter-spacing:-.02em}
#check-result .row > div{min-width:80px}

/* ============ Xác thực ============ */
.auth-wrap{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:28px 16px 32px}
.auth-wrap .auth-top{margin-bottom:24px}
.auth-card{width:100%;max-width:440px;padding:28px 24px}
@media (min-width:700px){.auth-wrap{justify-content:center}.auth-card{padding:32px 32px 28px}}
.auth-card h1{font-size:26px;margin:0 0 6px}
.auth-card .lede{color:var(--text-2);margin:0 0 22px;font-size:15px}
.auth-card .eyebrow{display:inline-block;font-size:12px;font-weight:700;color:#7a4a0c;background:var(--accent-soft);border-radius:999px;padding:2px 10px;margin-bottom:8px}
.auth-foot{display:flex;gap:8px;align-items:center;justify-content:center;font-size:13px;color:var(--text-3);margin-top:18px;padding-top:14px;border-top:1px solid var(--border)}
.auth-help{text-align:center;font-size:14px;color:var(--text-2);margin:14px 0 0}

/* ============ Quản trị ============ */
.adm-k{font-size:12px;font-weight:800;letter-spacing:.1em;color:#8a5410;background:var(--accent-soft);display:inline-block;padding:2px 8px;border-radius:5px;margin-bottom:6px}
.atabs{display:flex;gap:2px;overflow-x:auto;border-bottom:1px solid var(--border);margin:0 0 18px;padding:0;scrollbar-width:none}
.atabs::-webkit-scrollbar{display:none}
.atabs a{flex:none;min-height:44px;padding:0 12px;font:600 14.5px var(--font);color:var(--text-2);border-bottom:2.5px solid transparent;margin-bottom:-1px;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;text-decoration:none}
.atabs a[aria-selected="true"]{color:var(--primary);border-bottom-color:var(--primary)}
.kpis{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
@media (min-width:900px){.kpis{grid-template-columns:repeat(4,1fr)}}
.kpi{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);padding:14px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:2px}
.kpi:hover{border-color:#cdc6b6}
.kpi b{font-size:30px;font-weight:750;letter-spacing:-.02em;line-height:1.1}
.kpi span{font-size:14px;color:var(--text-2);line-height:1.35}
.kpi small{font-size:12.5px;color:var(--primary-2);font-weight:600;margin-top:6px}
.kpi.zero b{color:var(--text-3)} .kpi.zero small{color:var(--text-3);font-weight:500}
.issue{background:var(--surface);border:1px solid #f0d4d4;border-left:4px solid var(--err);border-radius:10px;padding:10px 12px;margin-bottom:8px;font-size:14.5px}
.issue.warning{border-color:#f0d99c;border-left-color:var(--warn);background:var(--warn-soft)}
.issue code,code{font:500 13px var(--mono);background:var(--surface-2);border:1px solid var(--border);border-radius:5px;padding:1px 6px;word-break:break-all}
.diff-added{color:var(--ok)}.diff-changed{color:var(--warn)}.diff-removed{color:var(--err)}
details.list-item > summary{cursor:pointer}
.word-card .mean{font-weight:600;font-size:15px}
.line-body{min-width:0}
.opt .k{width:24px;height:24px;border-radius:50%;border:1.5px solid #c4bfb2;flex:none;display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--text-2)}
.opt .ot{flex:1;min-width:0}
.opt[aria-pressed="true"] .k{background:var(--primary-2);border-color:var(--primary-2);color:#fff}
.opt.correct .k{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong .k{background:var(--err);border-color:var(--err);color:#fff}
.self-grade .btn small{font-size:12px;font-weight:500;color:var(--text-3)}
.speak-card ul{text-align:left}
.w-lemma{font-size:26px;font-weight:750;letter-spacing:-.01em;line-height:1.2}
.chips-scroll{display:flex;gap:6px;overflow-x:auto;padding:4px 0 10px;scrollbar-width:none}
.chips-scroll::-webkit-scrollbar{display:none}
.chips-scroll button{flex:none;min-height:36px;padding:0 12px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text-2);font:inherit;font-size:13.5px;font-weight:600;cursor:pointer;white-space:nowrap}
.chips-scroll button[aria-selected="true"]{background:var(--primary);border-color:var(--primary);color:#fff}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
/* Hướng dẫn người học */
.guide-page{width:100%}
.guide-sec{margin-top:14px;scroll-margin-top:80px}
.guide-sec h2{margin-top:0}
.guide-sec li{margin-bottom:6px}
.guide-steps{display:grid;gap:8px;margin:6px 0 10px}
.guide-steps .gs{display:flex;flex-direction:column;gap:2px;background:var(--surface-2);border-radius:10px;padding:10px 12px;font-size:14.5px}
.guide-compare{display:grid;gap:10px}
.guide-compare .gc{border-radius:12px;padding:12px;border:1px solid var(--border)}
.guide-compare .gc.self{background:repeating-linear-gradient(0deg,#fdfcf8 0 27px,#f1ede3 27px 28px);border:1.5px dashed #c9c3b5}
.guide-compare .gc p{margin:8px 0 0}
.guide-levels{display:grid;gap:8px;margin:8px 0}
.guide-levels .gl{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.guide-levels .gl .mastery{min-width:150px}
@media (min-width:700px){.guide-steps{grid-template-columns:repeat(3,1fr)}.guide-compare{grid-template-columns:1fr 1fr}}
/* ===== 4A: giao bài, chấm bài, theo dõi ===== */
.pick-list{max-height:220px;overflow:auto;border:1px solid var(--border);border-radius:10px;padding:4px 8px;background:var(--surface)}
.pick-list .check{padding:6px 2px}
.task-prompt{background:var(--surface-2);border-radius:10px;padding:10px 12px;margin:8px 0}
.work{border-top:1px solid #efece5;padding-top:10px;margin-top:10px}
.work:first-of-type{border-top:0;margin-top:0}
.work.old{opacity:.85}
.work-text{white-space:pre-wrap;background:#fffdf8;border:1px solid var(--border);border-radius:10px;padding:12px 14px;font-size:16px;line-height:1.7;margin:4px 0 8px}
mark.an{background:#fde7c4;border-radius:3px;padding:0 1px;cursor:help}
mark.an::after{content:attr(data-n);font-size:10px;font-weight:800;vertical-align:super;margin-left:1px;color:#7a4a0c;user-select:none}
mark.an.an-grammar{background:#fbd5d5}mark.an.an-grammar::after{color:var(--err)}
mark.an.an-vocab{background:#dbe7f7}mark.an.an-vocab::after{color:var(--info)}
mark.an.an-spelling{background:#f6dcf0}mark.an.an-spelling::after{color:#8a2d72}
mark.an.an-style{background:#fde7c4}
mark.an.an-good{background:#d7efdd}mark.an.an-good::after{color:var(--ok)}
.chip.an-grammar{background:#fbd5d5;color:var(--err)}.chip.an-vocab{background:#dbe7f7;color:var(--info)}.chip.an-spelling{background:#f6dcf0;color:#8a2d72}.chip.an-style{background:#fde7c4;color:#7a4a0c}.chip.an-good{background:#d7efdd;color:var(--ok)}
.ann-list{padding-left:0;list-style:none;margin:8px 0;display:grid;gap:6px}
.ann-list li{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:8px 10px;font-size:14.5px}
.ann-list .q{color:var(--text-2)}
.ann-list .fix{color:var(--ok)}
.ann-form{background:var(--surface-2);border-radius:10px;padding:10px 12px;margin:8px 0}
.review-box{background:var(--ok-soft);border:1px solid #bfe0c8;border-radius:12px;padding:10px 12px;margin-top:8px}
.review-box .rv-h{margin:0 0 4px}
.rec-box{margin:8px 0}
.chip.st-todo{background:var(--surface-2);color:var(--text-2)}.chip.st-doing{background:var(--info-soft);color:var(--info)}.chip.st-done{background:var(--ok-soft);color:var(--ok)}.chip.st-redo{background:var(--accent-soft);color:#7a4a0c}
.cal28{display:grid;grid-template-columns:repeat(28,1fr);gap:3px;align-items:end;height:70px;margin:8px 0}
.cal28 .cd{display:block;height:var(--h);background:#e3dfd5;border-radius:3px 3px 1px 1px;min-height:4px}
.cal28 .cd.on{background:var(--primary-2)}
.skill-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.skill-grid .sk{display:flex;flex-direction:column;gap:2px;background:var(--surface-2);border-radius:10px;padding:10px 12px}
@media (min-width:700px){.skill-grid{grid-template-columns:repeat(4,1fr)}}
.wk{display:inline-flex;gap:2px}.wk i{width:10px;height:14px;border-radius:2px;background:#e3dfd5;display:inline-block}.wk i.on{background:var(--primary-2)}
.lr-row td{vertical-align:top}

/* ============ Bố cục desktop thống nhất ============ */
/* Mọi trang học viên dùng CÙNG một độ rộng (--content-w), Khu giáo viên rộng hơn (--content-wide).
   Không trang nào tự đặt max-width riêng → chuyển trang không còn "lúc to lúc nhỏ". */
@media (min-width:900px){
  .main{padding:28px 40px 56px}
  .tabs{flex-wrap:wrap;overflow:visible}
  .page-head{margin-bottom:20px}
  .empty{padding:36px 16px}
  .card > .empty{padding:28px 12px}
}
@media (min-width:1400px){ :root{--content-w:960px} }