@font-face{font-family:"Baloo 2";src:url("fonts/Baloo2.woff2") format("woff2");font-weight:400 800;font-display:swap}
:root{--navy:#0B2E59;--yellow:#FFD93D;--ink:#26303B;--bg:#F4F8FD;--card:#fff;--line:#D8E4F2}
*{box-sizing:border-box}
body{margin:0;font-family:"Baloo 2","Segoe UI",system-ui,sans-serif;background:var(--bg);color:var(--ink)}
button,input,select,textarea{font-family:inherit}
header{background:var(--navy);color:#fff;padding:18px 16px 14px;position:relative;overflow:hidden}
header .brand{display:flex;gap:14px;align-items:center;max-width:1060px;margin:0 auto}
header img{width:74px;height:74px;object-fit:cover;border-radius:16px;border:3px solid var(--yellow)}
header h1{margin:0;font-size:26px;line-height:1.15}
header h1 span{color:var(--yellow)}
header p{margin:4px 0 0;opacity:.85;font-size:15px}
main{max-width:1060px;margin:0 auto;padding:18px 14px 60px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;margin-bottom:16px;box-shadow:0 2px 10px rgba(11,46,89,.05)}
.next-up{border:2px solid var(--yellow);background:#FFFDF2}
.btn{display:inline-block;background:var(--navy);color:#fff;border:none;padding:12px 22px;border-radius:999px;font-size:17px;font-weight:700;cursor:pointer;text-decoration:none}
.btn.big{font-size:19px;padding:14px 28px}
.btn.gold{background:var(--yellow);color:var(--navy)}
.btn.ghost{background:#fff;color:var(--navy);border:2px solid var(--navy)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}
.branch-head{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.branch-head .dot{width:16px;height:16px;border-radius:50%}
.branch-head h2{margin:0;font-size:22px}
.bar{height:12px;background:#E9EFF7;border-radius:99px;overflow:hidden;margin:8px 0 4px}
.bar>i{display:block;height:100%;border-radius:99px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:8px 13px;border-radius:999px;border:2px solid var(--line);background:#fff;font-weight:600;font-size:15px;text-decoration:none;color:var(--ink)}
.chip small{font-weight:400;opacity:.75}
.chip.done{color:#fff}
.chip.todo:hover{border-color:var(--navy)}
.locked-list{margin:8px 0 0;padding-left:20px;color:#5A6B7D;font-size:14.5px;line-height:1.55}
.stats{display:flex;gap:12px;flex-wrap:wrap}
.stat{flex:1;min-width:140px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;text-align:center}
.stat b{display:block;font-size:30px;color:var(--navy)}
/* ---- trang chu kỳ ---- */
.steps{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.step-tab{flex:1;min-width:170px;text-align:center;padding:11px 8px;border-radius:14px;background:#E9EFF7;font-weight:700;color:#5A6B7D;border:2px solid transparent}
.step-tab.on{background:#fff;border-color:var(--navy);color:var(--navy)}
.step-tab.ok{background:#E6F4EA;color:#2E7D32}
video{width:100%;border-radius:14px;background:#000}
.opt{display:block;width:100%;text-align:left;padding:14px 16px;margin:8px 0;border-radius:14px;border:2px solid var(--line);background:#fff;font-size:17px;cursor:pointer}
.opt.sel{border-color:var(--navy);background:#EEF4FC;font-weight:700}
.opt.right{border-color:#2E7D32;background:#E6F4EA}
.opt.wrong{border-color:#C62828;background:#FDECEA}
.opt:disabled{cursor:default;opacity:.92}
.locked-note{background:#FFF8E1;border:1.5px dashed #E0A800;border-radius:12px;padding:12px 14px;font-weight:600}
.why{background:#F2F7FE;border-left:5px solid var(--navy);border-radius:8px;padding:10px 14px;margin-top:10px;font-size:16px}
.tabs{display:flex;gap:8px;margin-bottom:12px}
.tab{padding:10px 18px;border-radius:999px;border:2px solid var(--line);background:#fff;font-weight:700;cursor:pointer;font-size:16px}
.tab.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.checkline{display:flex;gap:10px;align-items:flex-start;font-size:16.5px;margin:10px 0;cursor:pointer}
.checkline input{width:22px;height:22px;margin-top:2px}
.rule-box{border:3px solid #C62828;border-radius:16px;padding:16px 18px;background:#FFFDF5;font-size:19px;line-height:1.5}
.kw{display:inline-block;background:#E3F0FB;color:var(--navy);font-weight:700;border-radius:999px;padding:6px 14px;margin:3px;font-size:16px}
.done-banner{background:#E6F4EA;border:2px solid #2E7D32;border-radius:16px;padding:16px;text-align:center;font-size:19px}
.muted{color:#5A6B7D}
a.back{color:var(--navy);font-weight:700;text-decoration:none}
h2.sec{margin:4px 0 10px;font-size:21px}
ol.steps li,ul.steps li{margin:6px 0;font-size:16.5px;line-height:1.5}
.safety{background:#FFF3E0;border-radius:10px;padding:10px 14px;font-size:15.5px}
footer{background:var(--navy);color:#FFD93D;text-align:center;padding:12px;font-weight:700}
@media(max-width:560px){header h1{font-size:21px}.stat b{font-size:24px}}

/* ---- Popup từng chạm ---- */
.pop{position:fixed;inset:0;background:rgba(11,46,89,.5);z-index:80;display:none;overflow-y:auto}
.pop.open{display:block}
.pop-sheet{max-width:780px;margin:0 auto;min-height:100%;background:var(--bg);padding:0 12px 40px;position:relative}
.pop-bar{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;background:var(--navy);color:#fff;padding:13px 16px;margin:0 -12px 14px;font-size:17px}
.pop-x{background:#fff;color:var(--navy);border:none;width:36px;height:36px;border-radius:50%;font-size:17px;font-weight:800;cursor:pointer}
.hub-row{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 4px;border-top:1px solid var(--line);font-size:16.5px;font-weight:600}
.hub-ok{color:#2E7D32;font-weight:700}

/* ---- Nút nổi 3D (kiểm chứng) ---- */
.btn3d{flex:1;padding:16px 10px;border:none;border-radius:16px;background:#fff;color:var(--navy);font-size:18px;font-weight:800;cursor:pointer;box-shadow:0 5px 0 #B9CCE4,0 8px 14px rgba(11,46,89,.15);border:2px solid #B9CCE4;transition:transform .08s,box-shadow .08s}
.btn3d:active{transform:translateY(3px);box-shadow:0 2px 0 #B9CCE4}
.btn3d.on{background:var(--navy);color:#fff;border-color:var(--navy);box-shadow:0 5px 0 #061C38,0 8px 14px rgba(11,46,89,.25)}
.btn3d.purple.on{background:#7B1FA2;border-color:#7B1FA2;box-shadow:0 5px 0 #4A0E63,0 8px 14px rgba(123,31,162,.25)}

/* ---- Huy hiệu 3D ---- */
.badge3d{width:96px;height:96px;margin:0 auto;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:46px;position:relative;
 background:radial-gradient(circle at 32% 28%,#FFF3B0 0%,#FFD93D 38%,#F2B705 72%,#D99A00 100%);
 border:4px solid #B97F00;box-shadow:0 8px 18px rgba(0,0,0,.3),inset 0 -8px 14px rgba(146,96,0,.45),inset 0 6px 10px rgba(255,255,255,.65)}
.badge3d::after{content:"";position:absolute;top:7px;left:14px;width:38px;height:20px;border-radius:50%;background:rgba(255,255,255,.55);transform:rotate(-24deg)}
.badge3d.big{width:132px;height:132px;font-size:64px;animation:badgeIn .7s cubic-bezier(.2,1.6,.4,1) both}
.badge3d.grey{filter:grayscale(1);opacity:.38}
@keyframes badgeIn{from{transform:scale(.2) rotate(-30deg);opacity:0}to{transform:scale(1) rotate(0);opacity:1}}
.congrats-card{text-align:center;padding-top:30px}
.congrats-title{font-size:30px;color:var(--navy);margin:16px 0 6px}
.congrats-btns{display:flex;flex-direction:column;gap:10px;align-items:center;margin-top:16px}
#confetti-zone{position:absolute;inset:0;overflow:hidden;pointer-events:none;z-index:3}
.confetti{position:absolute;top:-16px;display:block;animation-name:confFall;animation-timing-function:linear;animation-fill-mode:forwards}
@keyframes confFall{to{transform:translateY(105vh) rotate(720deg)}}

/* ---- Góc huy hiệu thu gọn ---- */
#badge-corner{position:fixed;left:12px;bottom:12px;z-index:70}
.badge-mini{width:58px;height:58px;border-radius:50%;cursor:pointer;position:relative;display:flex;align-items:center;justify-content:center;
 background:radial-gradient(circle at 32% 28%,#FFF3B0 0%,#FFD93D 38%,#F2B705 72%,#D99A00 100%);
 border:3px solid #B97F00;box-shadow:0 6px 14px rgba(0,0,0,.3),inset 0 -5px 9px rgba(146,96,0,.45),inset 0 4px 7px rgba(255,255,255,.65)}
.badge-mini .badge-face{font-size:27px}
.badge-count{position:absolute;top:-5px;right:-5px;background:#C62828;color:#fff;font-size:14px;font-weight:800;min-width:24px;height:24px;border-radius:99px;display:flex;align-items:center;justify-content:center;border:2px solid #fff;padding:0 5px}
.badge-mini.pop-anim{animation:badgePop .6s cubic-bezier(.2,1.8,.4,1)}
@keyframes badgePop{0%{transform:scale(1)}40%{transform:scale(1.35) rotate(8deg)}100%{transform:scale(1)}}
.badge-shelf{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;padding:10px 0}
.shelf-item{width:110px;text-align:center}
.shelf-item small{display:block;margin-top:8px;font-weight:600;line-height:1.3}
.shelf-item.locked small{color:#8CA0B5}

/* --- Vượt ải Quái Tri Thức --- */
.monster-intro{display:flex;gap:16px;align-items:flex-start;flex-wrap:wrap}
.monster-img{width:128px;height:128px;object-fit:cover;border-radius:26px;border:3px solid var(--yellow);box-shadow:0 8px 20px rgba(11,46,89,.22);flex:none}
.monster-img.win{width:170px;height:170px;margin:0 auto;display:block}
.monster-intro>div{flex:1;min-width:230px}
.monster-stage{display:flex;gap:14px;align-items:center}
.hp{display:flex;gap:6px;margin:5px 0 3px}
.hp i{width:36px;height:14px;border-radius:99px;background:var(--yellow);border:2px solid #DFA800;display:block}
.hp i.off{background:#E9EFF7;border-color:#C9D6E8}
.speech{background:#FFF8E1;border:2px solid #FFE082;border-radius:14px;padding:10px 14px;font-weight:600;margin:10px 0}
.game-img{width:100%;border-radius:16px;margin:4px 0 10px;display:block}
.monster-img.hit{animation:hitShake .55s}
.monster-img.dodge{animation:dodgeSlide .55s}
@keyframes hitShake{0%,100%{transform:none}20%{transform:rotate(-6deg) scale(1.05)}40%{transform:rotate(5deg)}60%{transform:rotate(-4deg) scale(1.03)}80%{transform:rotate(3deg)}}
@keyframes dodgeSlide{0%,100%{transform:none}30%{transform:translateX(26px) rotate(3deg)}60%{transform:translateX(10px)}}
.monster-face{width:96px;height:96px;object-fit:cover;border-radius:50%;border:3px solid var(--yellow);box-shadow:0 6px 14px rgba(11,46,89,.18)}
.monster-face.grey{filter:grayscale(1);opacity:.38;border-color:#C9D6E8;box-shadow:none}
.chip-mon{width:22px;height:22px;border-radius:50%;object-fit:cover;border:2px solid #fff;vertical-align:-6px}