:root{
  --bg:#050507;--s1:#0b0b0f;--s2:#111118;--s3:#1a1a24;
  --orange:#fb6422;--orange-d:rgba(251,100,34,.12);--orange-g:rgba(251,100,34,.35);
  --green:#22c55e;--green-d:rgba(34,197,94,.12);
  --red:#ef4444;
  --w:#fff;--t1:#eee;--t2:#999;--t3:#555;--t4:#333;
  --brd:#1c1c28;
  --fh:'Bebas Neue',sans-serif;--f:'Inter',sans-serif;
  --ease:cubic-bezier(.4,0,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px}
body{background:var(--bg);color:var(--t2);font-family:var(--f);overflow-x:hidden;min-height:100vh;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--f);color:var(--w);font-weight:700}
a{text-decoration:none;color:var(--w)}
button{font-family:var(--f);cursor:pointer}
strong{color:var(--w);font-weight:600}

.text-orange{color:var(--orange)!important}
.gradient-text{background:linear-gradient(135deg,#ffc29b 0%,#fb6422 60%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

.app{display:flex;flex-direction:column;min-height:100vh}
.view{display:none;flex:1;flex-direction:column}
.view.active{display:flex}

/* ── TOPBAR ── */
.topbar{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:rgba(5,5,7,.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--brd)}
.topbar-left{display:flex;align-items:center;gap:10px}
.topbar-logo{height:28px}
.topbar-tag{font-size:.5rem;font-weight:800;letter-spacing:2px;color:var(--orange);padding:2px 7px;border:1px solid rgba(251,100,34,.3);border-radius:4px;background:var(--orange-d);text-transform:uppercase}
.topbar-center{display:flex;align-items:center;gap:12px}
.topbar-module{font-size:.7rem;font-weight:600;color:var(--t2);letter-spacing:.3px;white-space:nowrap}
.topbar-bar{width:120px;height:5px;background:var(--s3);border-radius:10px;overflow:hidden}
.topbar-fill{height:100%;background:linear-gradient(90deg,var(--orange),#ff9a5c);border-radius:10px;transition:width 1s var(--ease);width:0%}
.topbar-xp{display:flex;align-items:center;gap:6px;font-size:.8rem;font-weight:700;color:var(--orange)}
.topbar-xp i{font-size:.85rem}
.topbar-xp.glow{animation:xpGlow .6s ease}
@keyframes xpGlow{0%{text-shadow:none}50%{text-shadow:0 0 16px rgba(251,100,34,.8)}100%{text-shadow:none}}

/* ── HERO ── */
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 24px;text-align:center;position:relative}
.hero::before{content:'';position:absolute;top:-80px;left:50%;transform:translateX(-50%);width:700px;height:700px;background:radial-gradient(circle,rgba(251,100,34,.06) 0%,transparent 65%);pointer-events:none}
.hero-chip{display:inline-flex;align-items:center;gap:8px;padding:7px 18px;border-radius:50px;font-size:.65rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--orange);border:1px solid rgba(251,100,34,.25);background:var(--orange-d);margin-bottom:36px}
/* Hero Peek (bot hiding behind chip, peeking over) */
.hero-peek{position:relative;z-index:2;margin-bottom:-22px;animation:peekIn 1s var(--ease) both}
.hero-peek img{height:52px;filter:drop-shadow(0 4px 16px rgba(251,100,34,.3));clip-path:inset(0 0 40% 0);animation:peekReveal 1.2s var(--ease) .3s both,peekBob 2.5s ease-in-out 2s infinite}
@keyframes peekIn{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes peekReveal{from{clip-path:inset(0 0 80% 0)}to{clip-path:inset(0 0 22% 0)}}
@keyframes peekBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}

.hero-chip i{font-size:.7rem}
.hero h1{font-family:var(--fh);font-size:clamp(3.5rem,9vw,7rem);line-height:.88;letter-spacing:-2px;margin-bottom:28px;text-transform:uppercase;font-weight:400}
.hero-sub{font-size:1.05rem;color:var(--t2);max-width:480px;margin:0 auto 48px;font-weight:400;line-height:1.7}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:50px;font-family:var(--f);font-weight:700;font-size:.78rem;text-transform:uppercase;letter-spacing:.6px;cursor:pointer;transition:all .3s var(--ease);border:none}
.btn-p{background:var(--orange);color:#fff;padding:16px 36px;box-shadow:0 4px 24px rgba(251,100,34,.25)}
.btn-p:hover{background:#e85a1f;transform:translateY(-2px);box-shadow:0 8px 32px rgba(251,100,34,.4)}
.btn-p:active{transform:scale(.97)}
.btn-p.lg{padding:20px 48px;font-size:.85rem}
.btn-o{background:transparent;border:1px solid var(--t4);color:var(--t2);padding:14px 28px}
.btn-o:hover{border-color:var(--orange);color:var(--orange)}
.btn i{font-size:.85rem}

/* ── LESSON VIEW ── */
.lesson-top{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--brd);background:var(--s1)}
.l-close{width:36px;height:36px;border-radius:50%;background:transparent;border:1px solid var(--t4);color:var(--t3);display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:all .2s}
.l-close:hover{border-color:var(--orange);color:var(--orange)}
.l-dots{display:flex;gap:4px;flex:1}
.l-dot{height:5px;flex:1;border-radius:10px;background:var(--s3);transition:all .5s var(--ease)}
.l-dot.a{background:var(--orange)}
.l-dot.d{background:var(--green)}
.l-xp{font-size:.78rem;font-weight:700;color:var(--orange);display:flex;align-items:center;gap:5px}
.l-xp i{font-size:.8rem}

.lesson-body{flex:1;display:flex;align-items:center;justify-content:center;padding:24px 20px;overflow-y:auto;position:relative}

/* Bot peeking in lesson */
.lesson-peek{position:absolute;bottom:8px;right:16px;pointer-events:none;opacity:.12;animation:lpIn .6s var(--ease) .5s both,lpBob 3s ease-in-out 1.5s infinite}
.lesson-peek img{height:44px;clip-path:inset(0 0 30% 0)}
@keyframes lpIn{from{opacity:0;transform:translateY(20px)}to{opacity:.12;transform:translateY(0)}}
@keyframes lpBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}

.lcard{width:100%;max-width:520px;text-align:center;animation:cardPop .4s var(--ease);position:relative}
@keyframes cardPop{from{opacity:0;transform:scale(.94) translateY(16px)}to{opacity:1;transform:scale(1) translateY(0)}}

.lcard-icon{width:80px;height:80px;border-radius:24px;margin:0 auto 28px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.lcard-icon.orange{background:var(--orange-d);color:var(--orange)}
.lcard-icon.green{background:var(--green-d);color:var(--green)}
.lcard-icon.blue{background:rgba(99,102,241,.1);color:#818cf8}
.lcard-icon.purple{background:rgba(168,85,247,.1);color:#a855f7}

.lcard h2{font-size:1.35rem;margin-bottom:10px;letter-spacing:-.3px}
.lcard-desc{font-size:.9rem;color:var(--t2);line-height:1.65;margin-bottom:32px;max-width:420px;margin-left:auto;margin-right:auto}

/* Choices */
.choices{display:flex;flex-direction:column;gap:10px;width:100%}
.ch{width:100%;padding:20px 22px;background:var(--s1);border:2px solid var(--brd);border-radius:16px;color:var(--t1);font-size:.92rem;font-weight:600;text-align:left;display:flex;align-items:center;gap:14px;transition:all .25s var(--ease)}
.ch:hover{border-color:rgba(251,100,34,.5);background:rgba(251,100,34,.04);transform:translateY(-1px)}
.ch:active{transform:scale(.98)}
.ch-key{width:38px;height:38px;border-radius:10px;background:var(--s2);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.82rem;color:var(--t3);flex-shrink:0;transition:all .25s}
.ch.ok{border-color:var(--green)!important;background:rgba(34,197,94,.06)!important}
.ch.ok .ch-key{background:var(--green);color:#fff}
.ch.no{border-color:var(--red)!important;background:rgba(239,68,68,.04)!important;animation:shake .35s}
.ch.no .ch-key{background:var(--red);color:#fff}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}

/* Combo */
.combo{position:absolute;top:0;right:0;display:flex;align-items:center;gap:6px;padding:6px 14px;background:linear-gradient(135deg,rgba(251,100,34,.15),rgba(255,154,92,.1));border:1px solid rgba(251,100,34,.3);border-radius:10px;font-size:.75rem;font-weight:800;color:var(--orange);opacity:0;transform:scale(.7);transition:all .4s var(--ease);letter-spacing:.5px}
.combo.show{opacity:1;transform:scale(1)}
.combo.fire{animation:comboPop .4s var(--ease)}
.combo i{font-size:.8rem}
@keyframes comboPop{0%{transform:scale(1)}50%{transform:scale(1.2)}100%{transform:scale(1)}}

/* Step counter */
.step-count{display:flex;align-items:center;justify-content:center;gap:6px;margin-bottom:24px}
.step-pip{width:10px;height:10px;border-radius:50%;background:var(--s3);transition:all .3s var(--ease)}
.step-pip.done{background:var(--green)}
.step-pip.active{background:var(--orange);box-shadow:0 0 8px rgba(251,100,34,.4);transform:scale(1.3)}

/* True/False buttons */
.tf-row{display:flex;gap:12px;width:100%}
.tf{flex:1;padding:24px 16px;border-radius:16px;border:2px solid var(--brd);background:var(--s1);color:var(--t1);font-size:1rem;font-weight:700;display:flex;flex-direction:column;align-items:center;gap:8px;transition:all .25s var(--ease)}
.tf i{font-size:1.8rem}
.tf:hover{transform:translateY(-2px)}
.tf:active{transform:scale(.96)}
.tf.yes:hover{border-color:rgba(34,197,94,.5);background:rgba(34,197,94,.04)}
.tf.no:hover{border-color:rgba(239,68,68,.5);background:rgba(239,68,68,.04)}
.tf.ok{border-color:var(--green)!important;background:rgba(34,197,94,.06)!important}
.tf.ok i{color:var(--green)}
.tf.wrong{border-color:var(--red)!important;background:rgba(239,68,68,.04)!important;animation:shake .35s}
.tf.wrong i{color:var(--red)}

/* Fill-blank */
.fill-sentence{font-size:1.05rem;color:var(--t1);line-height:1.8;margin-bottom:20px}
.fill-blank{display:inline-block;min-width:100px;border-bottom:2px dashed var(--orange);color:var(--orange);font-weight:700;padding:2px 8px;transition:all .3s}
.fill-blank.filled{border-bottom-style:solid;border-color:var(--green);color:var(--green)}
.fill-opts{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.fill-opt{padding:12px 20px;border-radius:12px;border:2px solid var(--brd);background:var(--s1);color:var(--t1);font-size:.88rem;font-weight:600;transition:all .25s var(--ease)}
.fill-opt:hover{border-color:rgba(251,100,34,.5);transform:translateY(-1px)}
.fill-opt:active{transform:scale(.96)}
.fill-opt.ok{border-color:var(--green);background:rgba(34,197,94,.06);color:var(--green)}
.fill-opt.wrong{border-color:var(--red);background:rgba(239,68,68,.04);color:var(--red);animation:shake .35s}

/* Scenario visual */
.scenario{padding:20px;border-radius:16px;background:var(--s1);border:1px solid var(--brd);margin-bottom:20px;display:flex;align-items:center;gap:16px}
.scenario-chart{width:80px;height:60px;display:flex;align-items:flex-end;gap:3px}
.scenario-bar{flex:1;border-radius:3px 3px 0 0;transition:height .5s var(--ease)}
.scenario-label{font-size:.82rem;color:var(--t2);line-height:1.5}
.scenario-label strong{color:var(--w)}
.scenario-label .tag{display:inline-block;padding:2px 8px;border-radius:6px;font-size:.7rem;font-weight:700;margin-top:4px}
.tag.buy{background:var(--green-d);color:var(--green)}
.tag.sell{background:rgba(239,68,68,.1);color:var(--red)}
.tag.neutral{background:var(--orange-d);color:var(--orange)}

/* Explanation */
.exp{margin-top:20px;padding:20px;background:rgba(251,100,34,.04);border:1px solid rgba(251,100,34,.15);border-radius:14px;text-align:left;animation:cardPop .35s var(--ease)}
.exp h4{font-size:.82rem;font-weight:700;color:var(--orange);margin-bottom:5px;display:flex;align-items:center;gap:7px}
.exp h4 i{font-size:.85rem}
.exp p{font-size:.82rem;color:var(--t2);line-height:1.65}

/* Bottom bar */
.lesson-bot{padding:14px 16px;border-top:1px solid var(--brd);display:flex;justify-content:center;background:var(--s1)}
.btn-next{width:100%;max-width:520px;padding:20px;border-radius:16px;font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;border:none;display:flex;align-items:center;justify-content:center;gap:8px;transition:all .3s var(--ease)}
.btn-next.go{background:var(--orange);color:#fff;box-shadow:0 4px 20px rgba(251,100,34,.3)}
.btn-next.go:hover{background:#e85a1f;transform:translateY(-1px)}
.btn-next.go:active{transform:scale(.98)}
.btn-next.wait{background:var(--s2);color:var(--t4);pointer-events:none}
.btn-next.done{background:var(--green);color:#fff;box-shadow:0 4px 20px rgba(34,197,94,.3)}

/* ── TRANSITION SCREEN ── */
.transition-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:40px 24px;text-align:center;animation:cardPop .5s var(--ease)}
.trans-icon{width:80px;height:80px;border-radius:50%;background:var(--green-d);color:var(--green);display:flex;align-items:center;justify-content:center;font-size:2.2rem;margin-bottom:20px;border:2px solid rgba(34,197,94,.2);animation:celebPulse 1.5s ease infinite}
@keyframes celebPulse{0%,100%{box-shadow:0 0 0 0 rgba(34,197,94,.3)}50%{box-shadow:0 0 0 16px rgba(34,197,94,0)}}
.trans-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;color:var(--green);margin-bottom:8px}
.trans-title{font-size:1.6rem;margin-bottom:6px}
.trans-xp{font-family:var(--fh);font-size:3rem;color:var(--orange);line-height:1;margin-bottom:24px}
.trans-progress{display:flex;align-items:center;gap:12px;width:100%;max-width:320px;margin-bottom:36px}
.trans-bar{flex:1;height:8px;background:var(--s3);border-radius:10px;overflow:hidden}
.trans-bar-fill{height:100%;background:linear-gradient(90deg,var(--orange),#ff9a5c);border-radius:10px;transition:width 1.5s var(--ease);width:0%}
.trans-pct{font-size:.75rem;font-weight:700;color:var(--t3);min-width:36px}
.trans-next-label{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;color:var(--t3);margin-bottom:6px}
.trans-next-title{font-size:1.1rem;margin-bottom:24px;color:var(--t1)}
.trans-btn{min-width:260px}

/* ── FINAL SCREEN ── */
.final-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:40px 24px;text-align:center;animation:cardPop .5s var(--ease)}
.final-badge{width:100px;height:100px;border-radius:50%;background:var(--orange-d);color:var(--orange);display:flex;align-items:center;justify-content:center;font-size:2.8rem;margin-bottom:24px;border:2px solid rgba(251,100,34,.2)}
.final-title{font-family:var(--fh);font-size:4rem;line-height:1;margin-bottom:8px;text-transform:uppercase;font-weight:400;letter-spacing:2px}
.final-sub{font-size:1.2rem;margin-bottom:12px}
.final-desc{font-size:.9rem;color:var(--t2);max-width:420px;line-height:1.6;margin-bottom:32px}
.final-stats{display:flex;gap:24px;margin-bottom:36px}
.fs{text-align:center}
.fs-val{font-family:var(--fh);font-size:2rem;color:var(--orange);line-height:1}
.fs-lbl{font-size:.6rem;color:var(--t3);text-transform:uppercase;letter-spacing:1px;font-weight:600;margin-top:4px}
.final-cta{min-width:280px}

/* ── FLOATING XP ── */
.xp-float{position:fixed;z-index:500;font-family:var(--fh);font-size:2rem;color:var(--orange);pointer-events:none;animation:xpUp 1.2s var(--ease) forwards;text-shadow:0 0 20px rgba(251,100,34,.6)}
@keyframes xpUp{0%{opacity:1;transform:translateY(0) scale(1)}40%{opacity:1;transform:translateY(-40px) scale(1.2)}100%{opacity:0;transform:translateY(-90px) scale(.8)}}

/* ── SCREEN FLASH ── */
.flash{position:fixed;inset:0;z-index:190;pointer-events:none;opacity:0}
.flash.green{animation:flashG .5s ease-out}
.flash.red{animation:flashR .4s ease-out}
@keyframes flashG{0%{opacity:0;background:rgba(34,197,94,.15)}30%{opacity:1;background:rgba(34,197,94,.08)}100%{opacity:0}}
@keyframes flashR{0%{opacity:0;background:rgba(239,68,68,.12)}30%{opacity:1;background:rgba(239,68,68,.06)}100%{opacity:0}}

/* ── LEVEL UP BANNER ── */
.levelup{position:fixed;top:0;left:0;right:0;z-index:600;padding:16px;text-align:center;font-weight:800;font-size:.85rem;letter-spacing:1.5px;text-transform:uppercase;color:#fff;background:linear-gradient(90deg,var(--orange),#ff9a5c,var(--orange));transform:translateY(-100%);animation:lvlSlide 2.8s var(--ease) forwards}
.levelup i{margin-right:8px}
@keyframes lvlSlide{0%{transform:translateY(-100%)}12%{transform:translateY(0)}85%{transform:translateY(0)}100%{transform:translateY(-100%)}}

/* ── XP Note ── */
.final-xp-note{display:flex;align-items:center;justify-content:center;gap:8px;font-size:.78rem;color:var(--orange);font-weight:600;margin-bottom:20px;padding:10px 20px;border-radius:50px;background:var(--orange-d);border:1px solid rgba(251,100,34,.2)}
.final-xp-note i{font-size:.75rem}

/* ── CHATTRADE DEMO ── */
.demo-app{display:flex;flex-direction:column;height:100vh;background:#1a1d26;color:#e2e8f0}

/* Demo Top Bar */
.demo-topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:#1e2130;border-bottom:1px solid #2d3148}
.demo-symbol{display:flex;align-items:center;gap:8px;padding:6px 14px;background:#262a3a;border-radius:10px}
.demo-symbol strong{font-size:.8rem;color:#e2e8f0;display:block}
.demo-symbol small{font-size:.6rem;color:#8892b0}
.demo-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.demo-dot.btc{background:#f7931a}
.demo-role{font-size:.68rem;color:#8892b0;padding:6px 12px;border:1px solid #2d3148;border-radius:8px;display:none}
.demo-tokens{display:flex;align-items:center;gap:6px;font-size:.82rem;font-weight:700;color:#f7931a;padding:6px 14px;background:#262a3a;border-radius:10px}
.demo-tokens i{font-size:.7rem}

/* Buy/Sell Tags */
.demo-actions-bar{display:flex;gap:8px;padding:8px 16px}
.demo-tag{display:inline-flex;align-items:center;gap:5px;padding:5px 14px;border-radius:8px;font-size:.7rem;font-weight:700}
.demo-tag.buy{background:rgba(34,197,94,.12);color:#22c55e;border:1px solid rgba(34,197,94,.2)}
.demo-tag.sell{background:rgba(239,68,68,.1);color:#ef4444;border:1px solid rgba(239,68,68,.2)}

/* Chat Area */
.demo-chat-area{flex:1;display:flex;flex-direction:column;margin:0 12px;border-radius:14px;background:#1e2130;border:1px solid #2d3148;overflow:hidden}
.demo-chat-header{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid #2d3148}
.demo-bot-avatar{width:28px;height:28px;border-radius:8px;background:#262a3a;padding:4px}
.demo-chat-header strong{font-size:.8rem;color:#e2e8f0;display:block}
.demo-chat-header small{font-size:.6rem;color:#8892b0}
.demo-chat-tokens{margin-left:auto;font-size:.6rem;color:#8892b0}

.demo-chat-body{flex:1;overflow-y:auto;padding:20px 16px;display:flex;flex-direction:column;gap:12px}
.demo-welcome{text-align:center;padding:30px 10px}
.demo-welcome-icon{width:42px;height:42px;margin:0 auto 14px;opacity:.5}
.demo-welcome h3{font-size:1rem;color:#e2e8f0;margin-bottom:6px;font-weight:600}
.demo-welcome p{font-size:.78rem;color:#8892b0}

/* Chat Bubbles */
.demo-bubble{max-width:88%;padding:12px 16px;border-radius:14px;font-size:.82rem;line-height:1.65;animation:dBubIn .35s var(--ease)}
.demo-bubble.bot{align-self:flex-start;background:#262a3a;color:#e2e8f0;border-bottom-left-radius:4px}
.demo-bubble.user{align-self:flex-end;background:#3b82f6;color:#fff;border-bottom-right-radius:4px}
.demo-bubble strong{color:#f7931a}
.demo-bubble.user strong{color:#ffd700}
@keyframes dBubIn{from{opacity:0;transform:translateY(10px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}

/* Signal Card inside bubble */
.demo-signal{margin-top:10px;padding:10px 12px;background:rgba(247,147,26,.05);border:1px solid rgba(247,147,26,.15);border-radius:10px;display:flex;flex-direction:column;gap:5px}
.demo-signal-row{display:flex;justify-content:space-between;font-size:.72rem;color:#8892b0}
.demo-signal-row strong{color:#e2e8f0}
.demo-signal-tag{display:inline-block;padding:2px 8px;border-radius:6px;font-size:.6rem;font-weight:700}
.demo-signal-tag.long{background:rgba(34,197,94,.12);color:#22c55e}

/* Typing indicator */
.demo-typing{align-self:flex-start;padding:10px 16px;background:#262a3a;border-radius:14px;border-bottom-left-radius:4px;display:flex;gap:5px;animation:dBubIn .3s var(--ease)}
.demo-typing span{width:6px;height:6px;background:#8892b0;border-radius:50%;animation:dtBounce 1.2s infinite}
.demo-typing span:nth-child(2){animation-delay:.2s}
.demo-typing span:nth-child(3){animation-delay:.4s}
@keyframes dtBounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-5px)}}

/* Quick Action Buttons */
.demo-quick{display:flex;gap:8px;padding:10px 14px}
.demo-qbtn{padding:8px 16px;border-radius:10px;font-size:.72rem;font-weight:700;display:flex;align-items:center;gap:6px;border:none;cursor:pointer;transition:all .2s}
.demo-qbtn.analysis{background:#7c3aed;color:#fff}
.demo-qbtn.analysis:hover{background:#6d28d9}
.demo-qbtn.opp{background:#16a34a;color:#fff}
.demo-qbtn.opp:hover{background:#15803d}

/* Input Bar */
.demo-input-bar{display:flex;gap:8px;padding:10px 14px;border-top:1px solid #2d3148}
.demo-input{flex:1;background:#262a3a;border:1px solid #2d3148;border-radius:10px;padding:12px 16px;color:#e2e8f0;font-size:.8rem;font-family:var(--f)}
.demo-input::placeholder{color:#5a6480}
.demo-send{width:44px;height:44px;border-radius:10px;background:#3b82f6;border:none;color:#fff;display:flex;align-items:center;justify-content:center;font-size:1rem;cursor:pointer;transition:all .2s}
.demo-send:hover{background:#2563eb}

/* Features */
.demo-features{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:10px 12px;border-top:1px solid #2d3148;background:#1e2130}
.demo-feat{text-align:center;padding:12px 6px}
.demo-feat i{font-size:1.1rem;color:#f7931a;display:block;margin-bottom:6px}
.demo-feat strong{font-size:.68rem;color:#e2e8f0;display:block;margin-bottom:3px}
.demo-feat small{font-size:.55rem;color:#8892b0;line-height:1.3}

/* CTA Banner in demo */
.demo-cta-banner{padding:16px;margin:0 14px 10px;border-radius:12px;background:linear-gradient(135deg,#f7931a,#fb6422);text-align:center;animation:dBubIn .4s var(--ease)}
.demo-cta-banner p{font-size:.78rem;color:rgba(255,255,255,.85);margin-bottom:10px;line-height:1.5}
.demo-cta-banner strong{color:#fff}
.demo-cta-link{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:10px;background:#fff;color:#1a1d26;font-size:.8rem;font-weight:700;text-decoration:none;transition:all .2s}
.demo-cta-link:hover{transform:scale(1.03);box-shadow:0 4px 20px rgba(0,0,0,.3)}

/* ── CONFETTI ── */
.confetti{position:fixed;z-index:400;pointer-events:none;animation:cfall 2s ease-in forwards}
.confetti.square{width:8px;height:8px;border-radius:2px}
.confetti.circle{width:6px;height:6px;border-radius:50%}
.confetti.strip{width:3px;height:14px;border-radius:2px}
@keyframes cfall{0%{opacity:1;transform:translateY(0) rotate(0) scale(1)}50%{opacity:1}100%{opacity:0;transform:translateY(100vh) rotate(720deg) scale(.5)}}

/* ── RESPONSIVE ── */

/* Tablet */
@media(max-width:768px){
  .hero h1{font-size:4.5rem}
  .hero-sub{font-size:.95rem}
  .lcard{max-width:100%;padding:0 8px}
  .lcard h2{font-size:1.2rem}
  .lcard-desc{font-size:.85rem}
  .ch{padding:18px 18px;font-size:.88rem}
  .ch-key{width:34px;height:34px;font-size:.78rem}
  .tf{padding:20px 14px;font-size:.95rem}
  .tf i{font-size:1.5rem}
  .fill-sentence{font-size:.95rem}
  .fill-opt{padding:10px 16px;font-size:.82rem}
  .trans-title{font-size:1.4rem}
  .trans-xp{font-size:2.5rem}
  .final-title{font-size:3.5rem}
  .final-stats{gap:20px}
  .fs-val{font-size:1.6rem}
  .scenario{flex-direction:column;align-items:flex-start}
}

/* Mobile */
@media(max-width:480px){
  html{font-size:15px}
  .topbar{padding:10px 14px}
  .topbar-center{display:none}
  .topbar-logo{height:24px}
  .topbar-tag{font-size:.45rem;padding:2px 5px}
  .topbar-xp{font-size:.75rem}

  .hero-peek img{height:38px}
  .hero-peek{margin-bottom:-14px}

  .hero{padding:32px 20px;min-height:100dvh}
  .hero h1{font-size:clamp(2.8rem,12vw,4rem);letter-spacing:-1px}
  .hero-chip{font-size:.55rem;padding:5px 12px}
  .hero-sub{font-size:.88rem;margin-bottom:36px}
  .hero-actions{flex-direction:column;align-items:center;gap:10px;width:100%}
  .hero-actions .btn{width:100%;max-width:320px}
  .btn-p.lg{padding:18px 32px;font-size:.8rem}
  .btn-o{padding:12px 24px;font-size:.72rem}

  .lesson-top{padding:10px 12px;gap:8px}
  .l-close{width:32px;height:32px;font-size:1rem}
  .l-dot{height:4px}
  .l-xp{font-size:.72rem}
  .l-xp i{font-size:.7rem}

  .lesson-body{padding:16px 14px}
  .lcard-icon{width:64px;height:64px;border-radius:18px;font-size:1.4rem;margin-bottom:20px}
  .lcard h2{font-size:1.1rem;margin-bottom:8px}
  .lcard-desc{font-size:.82rem;margin-bottom:24px;line-height:1.6}

  .step-count{gap:5px;margin-bottom:18px}
  .step-pip{width:8px;height:8px}

  .lesson-peek{bottom:4px;right:10px}
  .lesson-peek img{height:34px}

  .choices{gap:8px}
  .ch{padding:14px 14px;font-size:.82rem;gap:10px;border-radius:14px}
  .ch-key{width:32px;height:32px;border-radius:8px;font-size:.72rem}

  .tf-row{gap:8px}
  .tf{padding:18px 12px;font-size:.88rem;border-radius:14px}
  .tf i{font-size:1.4rem}

  .fill-sentence{font-size:.9rem;line-height:1.7;margin-bottom:16px}
  .fill-blank{min-width:70px;font-size:.85rem}
  .fill-opts{gap:6px}
  .fill-opt{padding:10px 14px;font-size:.8rem;border-radius:10px}

  .combo{font-size:.65rem;padding:4px 10px}

  .exp{padding:14px;margin-top:14px;border-radius:12px}
  .exp h4{font-size:.75rem}
  .exp p{font-size:.75rem}

  .lesson-bot{padding:10px 12px}
  .btn-next{padding:16px;font-size:.82rem;border-radius:14px}

  .transition-screen{padding:32px 20px}
  .trans-icon{width:64px;height:64px;font-size:1.8rem}
  .trans-label{font-size:.6rem}
  .trans-title{font-size:1.2rem}
  .trans-xp{font-size:2.2rem;margin-bottom:18px}
  .trans-progress{max-width:280px;margin-bottom:28px}
  .trans-btn{min-width:220px}

  .final-screen{padding:32px 20px}
  .final-badge{width:80px;height:80px;font-size:2.2rem}
  .final-title{font-size:2.8rem}
  .final-sub{font-size:1rem}
  .final-desc{font-size:.82rem}
  .final-stats{gap:14px;margin-bottom:28px}
  .fs-val{font-size:1.4rem}
  .fs-lbl{font-size:.5rem}
  .final-cta{min-width:240px}

  .xp-float{font-size:1.5rem}
  .levelup{font-size:.75rem;padding:12px}
}

/* Small phones */
@media(max-width:360px){
  html{font-size:14px}
  .hero h1{font-size:2.5rem}
  .hero-sub{font-size:.82rem}
  .lcard-icon{width:56px;height:56px;font-size:1.2rem}
  .ch{padding:12px 12px;font-size:.78rem}
  .ch-key{width:28px;height:28px;font-size:.65rem}
  .tf{padding:14px 10px;font-size:.82rem}
  .fill-opt{padding:8px 12px;font-size:.75rem}
  .btn-next{padding:14px;font-size:.78rem}
  .trans-title{font-size:1.05rem}
  .final-title{font-size:2.2rem}
}

/* Safe area for notch devices */
@supports(padding:max(0px)){
  .topbar{padding-top:max(12px,env(safe-area-inset-top));padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
  .lesson-bot{padding-bottom:max(14px,env(safe-area-inset-bottom))}
  .hero{padding-bottom:max(40px,env(safe-area-inset-bottom))}
}

/* Landscape phones */
@media(max-height:500px) and (orientation:landscape){
  .hero{min-height:auto;padding:24px 20px}
  .hero h1{font-size:2.5rem}
  .hero-chip{margin-bottom:16px}
  .hero-sub{margin-bottom:24px;font-size:.8rem}
  .lesson-body{padding:12px 16px}
  .lcard-icon{width:48px;height:48px;font-size:1.1rem;margin-bottom:12px}
  .lcard h2{font-size:1rem}
  .lcard-desc{font-size:.78rem;margin-bottom:16px}
  .step-count{margin-bottom:12px}
  .ch{padding:10px 12px;font-size:.78rem}
  .tf{padding:12px 10px;font-size:.82rem}
  .tf i{font-size:1.1rem}
}