/* One screen, one task. Big picture, big sentence below it, controls at the bottom. Nothing moves unless the child taps. */
:root{
  --bg:#f3f1ea;--panel:#ffffff;--fg:#2a2f35;--muted:#6f7680;--line:#dcd8cc;
  --accent:#2f7a6b;--accent-soft:#dcebe6;--sky:#e3eef5;--water:#9fc3d6;--earth:#c9b89a;--leaf:#7aa86a;
  --ok:#4f8f5a;--ok-soft:#e1efe3;--warm:#d9a441;
  --font-h:'Lexend','Be Vietnam Pro',system-ui,sans-serif;--font-b:'Be Vietnam Pro',system-ui,sans-serif;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --bg:#1d2024;--panel:#272b31;--fg:#eceae4;--muted:#a3a8b0;--line:#3a3f46;--accent:#7cc4b0;--accent-soft:#2a3f3a;--sky:#2b353d;--water:#4a6b7c;--earth:#6b5d44;--leaf:#5f8a52;--ok:#8fcb97;--ok-soft:#2b3d2e;--warm:#e0b65c;color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#1d2024;--panel:#272b31;--fg:#eceae4;--muted:#a3a8b0;--line:#3a3f46;--accent:#7cc4b0;--accent-soft:#2a3f3a;--sky:#2b353d;--water:#4a6b7c;--earth:#6b5d44;--leaf:#5f8a52;--ok:#8fcb97;--ok-soft:#2b3d2e;--warm:#e0b65c;color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--fg);font-family:var(--font-b);font-size:17px;line-height:1.5;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:12px 40px}
h1,h2,h3{font-family:var(--font-h);text-wrap:balance;margin:0}
button{font:inherit;cursor:pointer;border:1px solid var(--line);background:var(--panel);color:var(--fg);border-radius:14px;padding:12px 18px;min-height:52px}
button:disabled{opacity:.5;cursor:default}
button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.wrap{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.top .brand{display:flex;flex-direction:column;gap:2px}
.top .brand small{color:var(--muted);font-size:13px;letter-spacing:.04em;text-transform:uppercase}
.top h1{font-size:22px}
.topnav{display:flex;gap:6px;flex-wrap:wrap}
.topnav button{min-height:40px;padding:6px 14px;border-radius:999px;font-size:14px}
.topnav button[aria-pressed="true"]{background:var(--accent);color:#fff;border-color:var(--accent)}
.scenes{display:flex;gap:6px;align-items:center}
.scenes button{flex:1;min-height:44px;padding:4px;border-radius:10px;font-family:var(--font-h);font-size:15px}
.scenes button.done{background:var(--ok-soft);border-color:var(--ok)}
.scenes button[aria-current="true"]{background:var(--accent);color:#fff;border-color:var(--accent)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:20px;overflow:hidden}
.art{background:var(--sky);aspect-ratio:16/9;max-width:100%}
.art svg{display:block;width:100%;height:100%}
.caption{padding:14px 18px 4px;display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.caption .where{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.caption h2{font-size:18px}
.modes{display:flex;gap:6px;padding:12px 18px 0;flex-wrap:wrap}
.modes button{min-height:44px;padding:8px 14px;border-radius:999px;font-size:15px}
.modes button[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);color:var(--fg)}
.stage{padding:18px;display:flex;flex-direction:column;gap:14px;min-height:220px}
.big{font-family:var(--font-h);font-size:clamp(22px,4vw,30px);line-height:1.4;font-weight:600}
.chunks{display:flex;flex-wrap:wrap;gap:10px}
.chunks button{font-family:var(--font-h);font-size:clamp(20px,3.6vw,26px);padding:10px 18px;border-radius:14px;border-width:2px}
.chunks button.said{background:var(--accent-soft);border-color:var(--accent)}
.hint{color:var(--muted);font-size:15px}
.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.choices button{text-align:left;display:flex;gap:12px;align-items:center;font-size:18px;padding:12px 14px;min-height:64px;border-width:2px}
.choices button .ico{width:44px;height:44px;flex:none;border-radius:10px;background:var(--sky)}
.choices button .ico svg{width:100%;height:100%;display:block}
.choices button.right{background:var(--ok-soft);border-color:var(--ok)}
.choices button.again{border-style:dashed}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row .grow{flex:1}
.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.ghost{background:transparent}
.level{display:flex;gap:6px;align-items:center;font-size:14px;color:var(--muted)}
.level button{min-height:36px;padding:4px 12px;border-radius:999px;font-size:14px}
.level button[aria-pressed="true"]{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.mark{display:flex;gap:8px;flex-wrap:wrap}
.mark button{min-height:48px;font-size:15px}
.mark button[aria-pressed="true"]{background:var(--ok-soft);border-color:var(--ok)}
textarea,input,select{font:inherit;width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--fg);min-width:0}
.footer{display:flex;justify-content:space-between;gap:10px;padding:0 18px 18px;flex-wrap:wrap}
.frame{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.frame .box{border:2px solid var(--line);border-radius:14px;padding:12px;min-height:110px;display:flex;flex-direction:column;gap:6px}
.frame .box b{font-family:var(--font-h);font-size:13px;letter-spacing:.05em;text-transform:uppercase;color:var(--accent)}
.frame .box span{font-size:18px}
.doc{display:flex;flex-direction:column;gap:18px}
.doc h2{font-size:20px;margin-top:8px}
.doc p,.doc li{max-width:68ch}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;min-width:760px;font-size:15px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--accent-soft);font-family:var(--font-h);font-weight:600}
tr:last-child td{border-bottom:0}
.rules{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.rules div{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px}
.rules div b{font-family:var(--font-h);display:block;margin-bottom:4px}
.parent{background:var(--accent-soft);border-radius:14px;padding:12px 14px;font-size:15px}
.parent b{font-family:var(--font-h)}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:10px 18px;border-radius:999px;font-size:15px;opacity:0;transition:opacity .3s;pointer-events:none;max-width:90vw;text-align:center}
.toast.show{opacity:1}

/* ---- Bắt đầu (onboarding) ---- */
.steps{display:flex;gap:6px}
.steps div{flex:1;height:6px;border-radius:3px;background:var(--line)}
.steps div.on{background:var(--accent)}
.form{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;padding:18px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:15px;min-width:0}
.form label b{font-family:var(--font-h);font-weight:600}
.form .full{grid-column:1/-1}
.radios{display:flex;flex-wrap:wrap;gap:8px}
.radios button{min-height:44px;padding:8px 14px;border-radius:999px;font-size:15px}
.radios button[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent)}
.task{padding:18px;display:flex;flex-direction:column;gap:14px}
.task .num{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.mic{display:flex;flex-direction:column;align-items:center;gap:10px;padding:10px}
.micbtn{width:120px;height:120px;border-radius:50%;border:3px solid var(--accent);background:var(--panel);font-size:40px;display:flex;align-items:center;justify-content:center}
.micbtn.on{background:var(--accent);color:#fff}
.heard{font-family:var(--font-h);font-size:22px;min-height:34px;text-align:center}
.result{padding:18px;display:flex;flex-direction:column;gap:16px}
.result .lvl{font-family:var(--font-h);font-size:40px;color:var(--accent);font-weight:700}
.result ul{margin:0;padding-left:20px}
.plan{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.plan div{border:1px solid var(--line);border-radius:14px;padding:12px;background:var(--bg)}
.plan div b{font-family:var(--font-h);display:block;color:var(--accent)}

/* ---- Tự tập ---- */
.solo{display:flex;flex-direction:column;gap:14px}
.solo .card .stage{align-items:center;text-align:center;min-height:260px;justify-content:center}
.bigbtn{font-family:var(--font-h);font-size:24px;min-height:80px;padding:16px 36px;border-radius:24px;min-width:240px}
.okmark{font-size:56px;line-height:1}
.dots{display:flex;gap:8px;justify-content:center}
.dots span{width:12px;height:12px;border-radius:50%;background:var(--line)}
.dots span.on{background:var(--accent)}
.dots span.done{background:var(--ok)}
.wait{height:6px;width:100%;max-width:300px;background:var(--line);border-radius:3px;overflow:hidden}
.wait i{display:block;height:100%;width:0;background:var(--accent)}
/* ---- Bạn AI ---- */
.buddy{display:flex;gap:14px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:14px}
.buddy .av{width:96px;height:96px;flex:none;border-radius:24px;background:var(--sky);overflow:hidden}
.buddy .av svg{width:100%;height:100%;display:block}
.buddy .bubble{flex:1;min-width:0;background:var(--accent-soft);border-radius:16px;padding:12px 16px;font-family:var(--font-h);font-size:clamp(18px,3vw,22px);line-height:1.4;position:relative}
.buddy .bubble::before{content:"";position:absolute;left:-10px;top:22px;border:10px solid transparent;border-right-color:var(--accent-soft);border-left:0}
.buddy .bubble small{display:block;font-family:var(--font-b);font-size:13px;color:var(--muted);margin-bottom:2px}
.avatars{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px}
.avatars button{display:flex;flex-direction:column;align-items:center;gap:8px;padding:12px 8px;border-width:2px;border-radius:20px}
.avatars button svg{width:84px;height:84px}
.avatars button[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent)}
.avatars button span{font-family:var(--font-h);font-size:15px}
.journal{display:flex;flex-direction:column;gap:12px}
.journal .day{border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:var(--panel)}
.journal .day b{font-family:var(--font-h)}
.journal .diary{background:var(--accent-soft);border-radius:12px;padding:10px 12px;margin-top:8px;white-space:pre-wrap}
.report{border:1px solid var(--line);border-radius:14px;padding:14px;background:var(--panel);max-height:420px;overflow:auto}
.report h3{font-size:17px;margin:10px 0 4px}
@media (prefers-reduced-motion:reduce){.toast{transition:none}}
@media (max-width:520px){.caption h2{font-size:16px}.stage{padding:14px}}

.langpick{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--muted)}
.langpick select{width:auto;padding:6px 10px;min-height:40px}
[dir="rtl"] .buddy .bubble::before{left:auto;right:-10px;border-right:0;border-left:10px solid var(--accent-soft)}

/* chuyển mô-đun */
.modswitch{display:flex;gap:6px;flex-wrap:wrap}
.modswitch a{text-decoration:none;color:var(--fg);border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:8px 14px;font-family:var(--font-h);font-size:14px;min-height:40px;display:inline-flex;align-items:center}
.modswitch a[aria-current="page"]{background:var(--fg);color:var(--bg);border-color:var(--fg)}