:root{
  --bg:#07070b; --bg2:#0d0d14; --panel:#11111b; --panel2:#181826; --line:#1d1d2a;
  --text:#ececf1; --muted:#8b8b9a; --accent:#7c5cff; --accent2:#22d3ee;
  --good:#34d399; --bad:#f87171; --glow:0 0 60px rgba(124,92,255,.35);
  --grad:linear-gradient(135deg,#7c5cff 0%,#22d3ee 60%,#34d399 100%);
}
html.light-mode {
  --bg:#f9f9fb; --bg2:#f0f0f5; --panel:#ffffff; --panel2:#f8f8fc; --line:#e0e0e8;
  --text:#111111; --muted:#5a5a66; --accent:#6d28d9; --accent2:#0891b2;
}
html.light-mode body {
  background:radial-gradient(1200px 700px at 20% -10%, rgba(124,92,255,.08), transparent 60%),
             radial-gradient(900px 600px at 110% 10%, rgba(34,211,238,.06), transparent 60%),
             var(--bg);
}
*{box-sizing:border-box}
html{margin:0;padding:0;scrollbar-gutter:stable;overflow-y:scroll}
html:has(body.play){overflow:hidden;scrollbar-gutter:auto;}
body{
  background:radial-gradient(1200px 700px at 20% -10%, rgba(124,92,255,.18), transparent 60%),
             radial-gradient(900px 600px at 110% 10%, rgba(34,211,238,.12), transparent 60%),
             var(--bg);
  color:var(--text);
  font:15px/1.55 ui-sans-serif,-apple-system,Segoe UI,Inter,Roboto,sans-serif;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  margin:0;
  padding:0;
}
body.play{height:100dvh;min-height:unset;overflow:hidden;display:flex;flex-direction:column;}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}

/* ---------- Logo: image + text ---------- */
.logo-link{flex-shrink:0;transition:transform .2s,opacity .2s;display:flex;align-items:center;gap:8px;text-decoration:none}
.logo-link:hover{transform:translateY(-2px);opacity:.9}
.logo-img{height:48px;width:48px;object-fit:contain;display:block;flex-shrink:0}
@media (max-width:640px){.logo-img{height:40px;width:40px}}
.logo-text{display:flex;align-items:center;gap:0;font-size:26px;font-weight:800;letter-spacing:-.02em;line-height:1;user-select:none}
/* Dark mode logo */
.logo-text .pretend{background:linear-gradient(135deg,#c4b5fd 0%,#a78bfa 50%,#8b6bff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo-text .ai{background:linear-gradient(135deg,#7c5cff 0%,#8b6bff 50%,#a78bfa 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
/* Light mode logo */
html.light-mode .logo-text .pretend{background:linear-gradient(135deg,#060814 0%,#0b1020 50%,#111827 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
html.light-mode .logo-text .ai{background:linear-gradient(135deg,#7c5cff 0%,#8b6bff 50%,#a78bfa 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
@media (max-width:640px){.logo-text{font-size:21px}}

/* ---------- nav ---------- */
.nav{display:flex;justify-content:space-between;align-items:center;padding:14px 28px;border-bottom:1px solid var(--line);backdrop-filter:blur(8px);position:sticky;top:0;background:rgba(7,7,11,.75);z-index:100;gap:12px;flex-shrink:0;}
html.light-mode .nav{background:rgba(249,249,251,.88)}
body.play .nav{position:relative;top:auto;}
@media (max-width:640px){.nav{padding:10px 14px;}}
body.play .nav{padding:8px 14px;gap:8px;}
body.play .logo-img{height:36px;width:36px;}
body.play .logo-text{font-size:20px;}
@media (max-width:480px){
  body.play .mode-pill{display:none;}
  body.play .logo-text{font-size:17px;}
  body.play .logo-img{height:32px;width:32px;}
  body.play .timer{font-size:13px;padding:5px 10px;}
  body.play .theme-toggle{padding:5px 9px;font-size:13px;}
  body.play #themeToggle{display:none;}
}
.nav-right{display:flex;gap:10px;align-items:center}
.nav nav{display:flex;gap:6px;align-items:center}
.nav nav a{color:var(--muted);transition:all .2s;font-weight:600;font-size:14px;padding:6px 12px;border-radius:8px}
.nav nav a:hover{color:var(--accent);background:rgba(124,92,255,.08)}
@media (max-width:768px){.nav nav.desktop-nav{display:none}}
.theme-toggle{background:var(--panel);border:1px solid var(--line);padding:7px 12px;border-radius:999px;cursor:pointer;display:flex;align-items:center;gap:6px;font-size:15px;transition:all .2s;white-space:nowrap;color:var(--text)}
.theme-toggle:hover{border-color:var(--accent);transform:translateY(-1px)}
@media (max-width:640px){.theme-toggle{padding:6px 10px;font-size:14px}}
.cta-sm{background:var(--grad);color:#ffffff;padding:9px 18px;border-radius:999px;font-weight:600;cursor:pointer;transition:all .2s;display:inline-block;text-decoration:none;white-space:nowrap;font-size:14px}
.cta-sm:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(124,92,255,.3)}

/* Mobile Menu */
.menu-toggle{background:var(--panel);border:1px solid var(--line);padding:7px 11px;border-radius:8px;cursor:pointer;display:none;align-items:center;font-size:19px;transition:all .2s;color:var(--text)}
.menu-toggle:hover{border-color:var(--accent)}
@media (max-width:768px){.menu-toggle{display:flex}}
.mobile-menu{position:fixed;top:58px;right:0;left:0;background:var(--bg);border-bottom:1px solid var(--line);padding:14px 20px;display:flex;flex-direction:column;gap:10px;z-index:99;backdrop-filter:blur(12px)}
.mobile-menu.hidden{display:none}
.mobile-menu a{color:var(--muted);text-decoration:none;padding:10px 0;font-weight:600;font-size:15px;border-bottom:1px solid var(--line);transition:color .2s}
.mobile-menu a:last-of-type{border-bottom:none}
.mobile-menu a:hover{color:var(--accent)}
.mobile-menu .theme-toggle{width:100%;justify-content:center;border-radius:10px;margin-top:4px}
.mode-pill{font-size:12px;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);background:rgba(124,92,255,.1);border:1px solid rgba(124,92,255,.25);padding:5px 11px;border-radius:999px;font-weight:700;white-space:nowrap}
html.light-mode .mode-pill{background:rgba(109,40,217,.08);color:#6d28d9;border-color:rgba(109,40,217,.2)}

/* ---------- landing ---------- */
.hero{max-width:1180px;width:100%;margin:0 auto;padding:60px 28px 40px;flex:1}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center;width:100%}
@media (max-width:1024px){.hero{padding:50px 24px 30px}}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;gap:32px}.hero{padding:36px 20px 28px}}
@media (max-width:640px){.hero{padding:28px 16px 20px}.hero-grid{gap:22px}}
.kicker{color:var(--accent2);font-size:12px;letter-spacing:.3em;font-weight:600;margin:0 0 18px;animation:slideUp .4s ease-out;text-transform:uppercase}
@media (max-width:640px){.kicker{font-size:11px;margin:0 0 12px}}
.hero h1{font-size:clamp(30px,5.4vw,66px);line-height:1.1;margin:0 0 20px;letter-spacing:-.03em;font-weight:800}
@media (max-width:640px){.hero h1{font-size:clamp(26px,7.5vw,40px);margin:0 0 14px}}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--muted);font-size:17px;max-width:560px;margin:0 0 28px;line-height:1.6}
@media (max-width:768px){.sub{font-size:15px;margin:0 0 22px}}
@media (max-width:640px){.sub{font-size:14px;margin:0 0 18px}}
.start-form{display:flex;gap:10px;flex-wrap:wrap;max-width:560px}
.start-form input,.start-form select{
  background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;flex:1;min-width:120px;outline:none;color:var(--text);font-size:15px
}
.start-form input::placeholder{color:var(--muted);opacity:1}
.start-form input:focus,.start-form select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,92,255,.1)}
.start-form button{
  background:var(--grad);color:#ffffff;border:0;border-radius:12px;padding:14px 28px;font-weight:700;cursor:pointer;font-size:15px;
  box-shadow:0 4px 12px rgba(124,92,255,.3);transition:all .2s;white-space:nowrap
}
.start-form button:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(124,92,255,.4)}
.start-form button:active{transform:translateY(0)}
@media (max-width:640px){.start-form{flex-direction:column;gap:8px}.start-form input,.start-form select,.start-form button{width:100%;min-width:unset}}
.hint{color:var(--muted);font-size:13px;margin-top:12px;opacity:.8}

@keyframes slideUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ---------- game modes ---------- */
.modes-section{max-width:1080px;margin:0 auto;padding:60px 28px 20px;width:100%}
.modes-section h2{font-size:28px;margin:0 0 8px;letter-spacing:-.02em;text-align:center}
@media (max-width:640px){.modes-section{padding:40px 16px 16px}.modes-section h2{font-size:22px}}
.modes-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;width:100%;margin-top:16px}
@media (max-width:1024px){.modes-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.modes-grid{grid-template-columns:1fr 1fr;gap:10px}}
.mode-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 18px;display:flex;flex-direction:column;gap:10px;transition:all .3s;cursor:pointer}
.mode-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 8px 24px rgba(124,92,255,.15)}
.mode-icon{font-size:32px;line-height:1}
.mode-card h3{margin:0;font-size:16px;color:var(--text)}
.mode-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
@media (max-width:640px){.mode-card{padding:16px 14px}.mode-card p{display:none}}

/* ---------- how it works ---------- */
.how-it-works{max-width:1080px;margin:0 auto;padding:60px 28px;width:100%}
.how-it-works h2{font-size:28px;margin:0 0 36px;letter-spacing:-.02em}
@media (max-width:640px){.how-it-works{padding:40px 16px}.how-it-works h2{font-size:22px;margin:0 0 24px}}
.how-timeline{display:grid;gap:16px;margin-bottom:36px}
.timeline-step{display:grid;grid-template-columns:70px 1fr;gap:20px;padding:18px;border-left:3px solid var(--accent);background:rgba(124,92,255,.02);border-radius:8px}
@media (max-width:640px){.timeline-step{grid-template-columns:44px 1fr;gap:12px;padding:12px}}
.timeline-number{font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;display:flex;align-items:center}
.timeline-content h3{margin:0 0 4px;font-size:15px;color:var(--text)}
.timeline-content p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.tips-box{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:36px}
@media (max-width:768px){.tips-box{grid-template-columns:1fr}}
.tip{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px;display:flex;gap:14px}
.tip.warning{border-color:#f59e0b;background:rgba(245,158,11,.05)}
.tip-icon{font-size:28px;line-height:1;flex-shrink:0}
.tip h4{margin:0 0 10px;font-size:15px;color:var(--text)}
.tip ul{margin:0;padding-left:16px;color:var(--muted);font-size:13px}
.tip ul li{margin-bottom:5px}
.tip p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}

/* ---------- card stack ---------- */
.card-stack{position:relative;display:grid;gap:12px;animation:slideIn .5s ease-out}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
.chip-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:14px 16px;transition:all .3s}
.chip-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.chip-card.you{background:linear-gradient(180deg,#181828,#10101a);border-color:#2a2a40}
html.light-mode .chip-card.you{background:linear-gradient(180deg,#f3f0ff,#f5f0ff)}
.chip-card .who{font-size:11px;letter-spacing:.2em;color:var(--muted);margin-bottom:6px;text-transform:uppercase;font-weight:600}
.chip-card p{margin:0;color:var(--text);line-height:1.5;font-size:14px}
.chip-card code{background:rgba(124,92,255,.1);padding:2px 6px;border-radius:6px;font-size:12px;color:var(--accent)}
.score-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--glow);transition:all .3s}
.score-card:hover{border-color:var(--accent);box-shadow:0 0 80px rgba(124,92,255,.25);transform:translateY(-4px)}
.score-num{font-size:56px;font-weight:800;letter-spacing:-.04em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.score-num span{font-size:16px;color:var(--muted);-webkit-text-fill-color:var(--muted)}
.score-card .rank{color:var(--muted);margin:4px 0 8px;font-size:14px}
.score-card ul{margin:0;padding-left:16px;color:var(--muted);font-size:13px}

/* ---------- ranks ---------- */
.ranks{max-width:1080px;margin:0 auto;padding:40px 28px 60px;width:100%}
.ranks h2{font-size:28px;margin:0 0 10px;letter-spacing:-.02em;text-align:center}
@media (max-width:640px){.ranks{padding:30px 16px 40px}.ranks h2{font-size:22px}}
.rank-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;width:100%;margin-top:20px}
@media (max-width:1000px){.rank-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:640px){.rank-grid{grid-template-columns:repeat(2,1fr);gap:8px}}
.rank-grid>div{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 12px;display:flex;flex-direction:column;gap:3px;transition:all .3s;cursor:pointer}
.rank-grid>div:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 8px 24px rgba(124,92,255,.15)}
.rank-grid b{font-size:16px;color:var(--text)}
.rank-grid>div>span:first-of-type{color:var(--accent);font-weight:600;font-size:13px}
.rank-grid span{color:var(--muted);font-size:12px}
.rank-grid .top{background:linear-gradient(135deg,rgba(124,92,255,.3),rgba(34,211,238,.2));border-color:transparent;box-shadow:0 0 20px rgba(124,92,255,.2)}

/* ---------- leaderboard preview ---------- */
.leaderboard-preview{max-width:1080px;margin:0 auto;padding:0 28px 60px;width:100%}
@media (max-width:640px){.leaderboard-preview{padding:0 16px 40px}}
.lb-container{background:linear-gradient(135deg,rgba(124,92,255,.08),rgba(34,211,238,.05));border:1px solid var(--line);border-radius:20px;padding:36px;width:100%}
@media (max-width:768px){.lb-container{padding:24px 18px}}
@media (max-width:640px){.lb-container{padding:18px 14px;border-radius:14px}}
.lb-container h2{font-size:26px;margin:0 0 6px;letter-spacing:-.02em}
.lb-container>p{color:var(--muted);margin:0 0 24px;font-size:14px}
.lb-grid{display:grid;gap:8px;margin-bottom:18px}
.lb-item{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:grid;grid-template-columns:36px 1fr auto auto;gap:10px;align-items:center;transition:all .2s}
.lb-item:hover{transform:translateX(4px);border-color:var(--accent)}
.lb-rank{font-weight:700;color:var(--accent);font-size:15px;text-align:center}
.lb-item:first-child .lb-rank{color:#f59e0b;font-size:17px}
.lb-name{font-weight:600;color:var(--text);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lb-mode{background:rgba(124,92,255,.1);color:var(--accent);padding:3px 8px;border-radius:6px;font-size:11px;text-transform:uppercase;font-weight:600;white-space:nowrap}
.lb-score{font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-size:17px}
@media (max-width:640px){.lb-item{grid-template-columns:28px 1fr 40px;font-size:13px;gap:8px}.lb-mode{display:none}.lb-rank{font-size:13px}}

/* ---------- footer ---------- */
footer{padding:24px;border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:13px;margin-top:auto}
footer a{color:var(--muted);text-decoration:none;transition:color .2s}
footer a:hover{color:var(--text)}

/* ---------- leaderboard page ---------- */
.board-wrap{max-width:1080px;margin:0 auto;padding:50px 28px;width:100%;flex:1}
.board-wrap h1{font-size:44px;margin:0;letter-spacing:-.03em}
@media (max-width:768px){.board-wrap{padding:36px 20px}.board-wrap h1{font-size:30px}}
@media (max-width:640px){.board-wrap{padding:24px 14px}.board-wrap h1{font-size:24px}}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 18px}
@media (max-width:640px){.tabs{gap:6px;margin:14px 0 12px;justify-content:flex-start}}
.tab{background:var(--panel);border:1px solid var(--line);color:var(--muted);padding:7px 15px;border-radius:999px;font-weight:600;cursor:pointer;transition:all .2s;font-size:14px}
.tab:hover{border-color:var(--accent);color:var(--accent)}
.tab.active{background:var(--grad);color:#ffffff;border-color:transparent;box-shadow:0 4px 12px rgba(124,92,255,.2)}
.board-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media (max-width:720px){.board-cols{grid-template-columns:1fr;gap:16px}}
.col-h{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.2em;margin:0 0 10px;font-weight:700}
.board-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;counter-reset:rank}
.board-list li{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:grid;grid-template-columns:28px 1fr auto auto;gap:10px;align-items:center;transition:all .2s;color:var(--text);font-size:14px}
.board-list li:hover{transform:translateX(4px);border-color:var(--accent)}
.board-list li::before{counter-increment:rank;content:counter(rank);color:var(--muted);font-weight:700;font-size:13px}
.board-list li:nth-child(1){background:linear-gradient(135deg,rgba(124,92,255,.22),rgba(34,211,238,.12));border-color:transparent}
.board-list .who{font-weight:700;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.board-list .mode{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.12em;white-space:nowrap}
.board-list .rank-pill{color:var(--muted);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:90px}
.board-list .score{font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-size:20px;white-space:nowrap}
@media (max-width:640px){
  .board-list li{grid-template-columns:24px 1fr auto;font-size:13px;padding:10px 12px;gap:8px}
  .board-list .mode{display:none}
  .board-list .rank-pill{display:none}
  .board-list .score{font-size:17px}
}
.empty{color:var(--muted);text-align:center;padding:36px;background:var(--panel);border:1px dashed var(--line);border-radius:12px;font-size:14px}
.back-btn{display:flex;align-items:center;gap:6px;background:var(--panel);border:1px solid var(--line);padding:8px 14px;border-radius:10px;cursor:pointer;color:var(--muted);font-weight:600;transition:all .2s;text-decoration:none;font-size:14px}
.back-btn:hover{border-color:var(--accent);color:var(--text);transform:translateY(-1px)}

/* ---------- modals ---------- */
.warning-modal{position:fixed;inset:0;background:rgba(5,5,10,.88);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;padding:20px;z-index:200}
.warning-modal.hidden{display:none}
.warning-content{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:26px;max-width:400px;width:100%;text-align:center;box-shadow:var(--glow);animation:popIn .3s cubic-bezier(.34,1.56,.64,1)}
.warning-content h3{margin:0 0 10px;font-size:19px;letter-spacing:-.01em;color:var(--text)}
.warning-content p{margin:0 0 22px;color:var(--muted);line-height:1.6;font-size:14px}
.warning-buttons{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.warning-buttons button{padding:10px 22px;border-radius:10px;border:0;font-weight:600;cursor:pointer;transition:all .2s;min-width:110px;font-size:14px}
.warning-buttons .confirm{background:#dc2626;color:#fff}
.warning-buttons .confirm:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(220,38,38,.3)}
.warning-buttons .cancel{background:var(--panel2);border:1px solid var(--line);color:var(--text)}
.warning-buttons .cancel:hover{border-color:var(--accent);color:var(--accent)}

.loading-overlay{position:fixed;inset:0;background:rgba(5,5,10,.96);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;padding:20px;z-index:300;overflow-y:auto}
.loading-overlay.hidden{display:none}
html.light-mode .loading-overlay{background:rgba(248,249,250,.96)}
.loading-content{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:36px 28px;max-width:440px;width:100%;text-align:center;box-shadow:var(--glow);animation:popIn .3s cubic-bezier(.34,1.56,.64,1)}
.loading-content h3{margin:18px 0 10px;font-size:20px;letter-spacing:-.01em;color:var(--text)}
.loading-content p{margin:0 0 16px;color:var(--muted);line-height:1.6;font-size:14px}
.spinner{width:46px;height:46px;border:3px solid rgba(124,92,255,.2);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto}
@keyframes spin{to{transform:rotate(360deg)}}
.progress-bar{width:100%;height:3px;background:rgba(124,92,255,.1);border-radius:999px;overflow:hidden;margin:18px 0}
.progress-fill{height:100%;background:var(--grad);width:60%;animation:progress 2s ease-in-out infinite}
@keyframes progress{0%{width:10%}50%{width:70%}100%{width:90%}}

/* ---------- play page ---------- */
.timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:15px;background:var(--panel2);border:1px solid var(--line);padding:7px 13px;border-radius:999px;color:var(--text);white-space:nowrap}
.timer.warn{color:#f59e0b;border-color:#f59e0b;animation:pulse .6s ease-in-out infinite}
.timer.danger{color:#dc2626;border-color:#dc2626;animation:pulse .4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}

.chat-wrap{max-width:820px;margin:0 auto;padding:16px 16px 0;display:flex;flex-direction:column;width:100%;flex:1;overflow:hidden;min-height:0;}
@media (max-width:640px){.chat-wrap{padding:10px 10px 0;}}
.chat{flex:1;overflow-y:auto;overflow-x:hidden;display:flex;flex-direction:column;gap:12px;padding:6px 2px 10px;scrollbar-gutter:stable}
.msg{max-width:82%;padding:11px 15px;border-radius:18px;white-space:pre-wrap;word-wrap:break-word;animation:msgIn .22s ease;line-height:1.55}
@media (max-width:640px){.msg{max-width:92%;padding:9px 12px;font-size:14px;border-radius:14px}}
@keyframes msgIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.ai_user{background:var(--panel);border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:4px;color:var(--text)}
.msg.player_ai{background:linear-gradient(135deg,#2a1e60,#0f3c45);align-self:flex-end;border-bottom-right-radius:4px;color:#ffffff}
html.light-mode .msg.ai_user{background:#f0f9ff;border-color:#0891b2}
html.light-mode .msg.player_ai{background:linear-gradient(135deg,#ede9fe,#e0f2fe);border:none;color:#1e1b4b}
.msg .caret{display:inline-block;width:7px;height:13px;background:var(--accent2);vertical-align:-2px;margin-left:2px;animation:blink 1s infinite}
@keyframes blink{50%{opacity:0}}
.typing-bubble{display:inline-flex;gap:5px;align-items:center;padding:13px 16px}
.typing-bubble .dot{width:7px;height:7px;border-radius:50%;background:var(--muted);opacity:.4;animation:bounce 1.2s infinite}
.typing-bubble .dot:nth-child(2){animation-delay:.15s}
.typing-bubble .dot:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,80%,100%{transform:translateY(0);opacity:.4}40%{transform:translateY(-4px);opacity:1}}

.composer{display:flex;gap:8px;padding:10px 0 8px;border-top:1px solid var(--line);flex-shrink:0;background:var(--bg);align-items:flex-end}
@media (max-width:640px){.composer{gap:6px;padding:8px 0 6px}}
.composer textarea{flex:1;resize:none;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:11px 14px;outline:none;max-height:140px;min-height:44px;color:var(--text);font-size:15px;line-height:1.5}
.composer textarea::placeholder{color:var(--muted);opacity:1}
@media (max-width:640px){.composer textarea{font-size:14px;padding:10px 12px;border-radius:12px}}
.composer textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,92,255,.1)}
.composer button{background:var(--grad);color:#ffffff;border:0;border-radius:14px;padding:0 18px;font-weight:700;cursor:pointer;height:44px;transition:all .2s;white-space:nowrap;box-shadow:0 2px 8px rgba(124,92,255,.2);font-size:14px;flex-shrink:0}
@media (max-width:640px){.composer button{padding:0 12px;border-radius:12px;font-size:13px}}
.composer button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px rgba(124,92,255,.3)}
.composer button:disabled{opacity:.5;cursor:not-allowed}
.composer button.ghost{background:transparent;color:var(--muted);border:1px solid var(--line);box-shadow:none}
.composer button.ghost:hover{background:var(--panel2);color:var(--accent);border-color:var(--accent)}

/* ---------- mode picker overlay ---------- */
.overlay{position:fixed;inset:0;background:rgba(5,5,10,.88);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center;padding:16px;z-index:150;overflow-y:auto}
html.light-mode .overlay{background:rgba(248,249,250,.88)}
.overlay.hidden{display:none}
.result-card{max-width:540px;width:100%;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:var(--glow);margin:auto;animation:popIn .5s cubic-bezier(.34,1.56,.64,1)}
@keyframes popIn{0%{opacity:0;transform:scale(.95) translateY(16px)}100%{opacity:1;transform:scale(1) translateY(0)}}
@media (max-width:640px){.result-card{padding:18px 16px;border-radius:16px;max-height:calc(100dvh - 32px);overflow-y:auto}}
.result-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}
.big-score{font-size:68px;font-weight:800;letter-spacing:-.04em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
@media (max-width:640px){.big-score{font-size:52px}}
.big-score small{font-size:18px;color:var(--muted);-webkit-text-fill-color:var(--muted)}
.rank-pill{background:var(--grad);color:#000;padding:7px 15px;border-radius:999px;font-weight:700;font-size:13px;white-space:nowrap;box-shadow:0 4px 12px rgba(124,92,255,.3);animation:pulse-glow 2s ease-in-out infinite}
@keyframes pulse-glow{0%,100%{box-shadow:0 4px 12px rgba(124,92,255,.3)}50%{box-shadow:0 6px 20px rgba(124,92,255,.5)}}
.verdict{color:var(--text);font-size:15px;margin:0 0 14px;line-height:1.5}
.bars{display:grid;gap:7px;margin-bottom:14px}
.bar{display:grid;grid-template-columns:110px 1fr 36px;gap:8px;align-items:center;font-size:12px;color:var(--muted);animation:slideInLeft .4s ease-out}
@keyframes slideInLeft{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:translateX(0)}}
@media (max-width:400px){.bar{grid-template-columns:90px 1fr 30px;gap:6px}}
.bar .track{height:5px;background:rgba(124,92,255,.1);border-radius:999px;overflow:hidden}
html.light-mode .bar .track{background:rgba(124,92,255,.12)}
.bar .fill{height:100%;background:var(--grad);border-radius:999px;animation:fillWidth .6s ease-out forwards}
@keyframes fillWidth{from{width:0 !important}}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px}
@media (max-width:480px){.cols{grid-template-columns:1fr}}
.cols h4{margin:0 0 5px;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.12em}
.cols ul{margin:0;padding-left:16px;color:var(--text);font-size:13px}
.cols ul li{margin-bottom:4px}
.actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:16px}
@media (max-width:480px){.actions{gap:7px}.actions .btn{font-size:13px;padding:9px 14px}}
.btn{background:var(--grad);color:#ffffff;padding:10px 18px;border-radius:10px;font-weight:600;border:0;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:all .2s;box-shadow:0 2px 8px rgba(124,92,255,.2);font-size:14px;white-space:nowrap}
.btn:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(124,92,255,.3)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{background:var(--panel2);border-color:var(--accent);color:var(--accent)}

/* ---------- mode picker ---------- */
.m-input{width:100%;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:11px 14px;margin:6px 0 14px;outline:none;color:var(--text);font-size:15px}
.m-input::placeholder{color:var(--muted);opacity:1}
.m-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,92,255,.1)}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.mode-btn{background:var(--panel2);border:1px solid var(--line);border-radius:13px;padding:14px;text-align:left;cursor:pointer;color:var(--text);display:flex;flex-direction:column;gap:4px;transition:all .2s}
.mode-btn:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 4px 12px rgba(124,92,255,.1)}
.mode-btn b{font-size:15px;color:var(--text)}
.mode-btn span{color:var(--muted);font-size:12px}

/* ---------- export targets ---------- */
#exportRoot{position:fixed;left:-10000px;top:0;pointer-events:none;opacity:0}
.x-card,.x-chat{
  width:540px;background:linear-gradient(160deg,#0a0a12 0%,#13132a 100%);
  color:#ececf1;font:14px/1.5 ui-sans-serif,-apple-system,Segoe UI,Inter,sans-serif;
  border:1px solid #2a2a40;border-radius:24px;padding:28px;
}
/* Light mode stats card */
html.light-mode .x-card, html.light-mode .x-chat{
  background:linear-gradient(160deg,#f9f9fb 0%,#eeeef8 100%);
  color:#111111;border:1px solid #d0d0e0;
}
html.light-mode .x-mode{color:#5a5a66;border-color:#c0c0d0}
html.light-mode .x-name{color:#5a5a66}
html.light-mode .x-score small{color:#5a5a66;-webkit-text-fill-color:#5a5a66}
html.light-mode .x-bar{color:#5a5a66}
html.light-mode .x-track{background:#dcdce8}
html.light-mode .x-meta span{color:#5a5a66}
html.light-mode .x-meta{border-top-color:#d0d0e0}
html.light-mode .x-head{border-bottom-color:#d0d0e0}
html.light-mode .x-verdict{color:#333344}
html.light-mode .x-who{color:#5a5a66}
html.light-mode .x-msg.ai_user{background:#ebebf5;border-color:#d0d0e0}
html.light-mode .x-footer{border-top-color:#d0d0e0}
html.light-mode .x-footer-tagline{color:#5a5a66}
html.light-mode .x-footer-brand .xb-pretend{background:linear-gradient(135deg,#060814 0%,#0b1020 50%,#111827 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
html.light-mode .x-footer-brand .xb-ai{background:linear-gradient(135deg,#7c5cff 0%,#8b6bff 50%,#a78bfa 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
html.light-mode .x-brand .xb-pretend{background:linear-gradient(135deg,#060814 0%,#0b1020 50%,#111827 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
html.light-mode .x-brand .xb-ai{background:linear-gradient(135deg,#7c5cff 0%,#8b6bff 50%,#a78bfa 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.x-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.x-brand{font-weight:800;display:flex;align-items:center;gap:6px;font-size:18px;letter-spacing:-.01em}
.x-logo-img{width:28px;height:28px;object-fit:contain;display:block;flex-shrink:0}
.x-brand .xb-pretend{background:linear-gradient(135deg,#c4b5fd 0%,#a78bfa 50%,#8b6bff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.x-brand .xb-ai{background:linear-gradient(135deg,#7c5cff 0%,#8b6bff 50%,#a78bfa 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.x-mode{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:#8b8b9a;border:1px solid #2a2a40;padding:4px 10px;border-radius:999px}
.x-name{font-size:14px;color:#8b8b9a;margin-bottom:4px}
.x-score{font-size:80px;font-weight:800;letter-spacing:-.04em;line-height:1;background:linear-gradient(135deg,#7c5cff,#22d3ee,#34d399);-webkit-background-clip:text;background-clip:text;color:transparent}
.x-score small{font-size:20px;color:#8b8b9a;-webkit-text-fill-color:#8b8b9a}
.x-rank{display:inline-block;background:linear-gradient(135deg,#7c5cff,#22d3ee);color:#000;padding:5px 14px;border-radius:999px;font-weight:700;margin:8px 0 12px;font-size:13px}
.x-verdict{font-style:italic;color:#d4d4dc;margin:0 0 14px;font-size:13px;line-height:1.5}
.x-bars{display:grid;gap:6px;margin-bottom:16px}
.x-bar{display:grid;grid-template-columns:120px 1fr 32px;gap:10px;align-items:center;font-size:11px;color:#8b8b9a}
.x-track{height:5px;background:#1a1a26;border-radius:999px;overflow:hidden}
.x-fill{height:100%;background:linear-gradient(90deg,#7c5cff,#22d3ee,#34d399);border-radius:999px;display:block}
.x-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;border-top:1px solid #2a2a40;padding-top:12px}
.x-meta>div{display:flex;flex-direction:column;gap:3px}
.x-meta b{font-size:17px}
.x-meta span{color:#8b8b9a;font-size:11px;text-transform:uppercase;letter-spacing:.12em}
.x-footer-brand{display:flex;align-items:center;gap:6px;font-weight:800;font-size:14px}
.x-footer-brand .xb-pretend{background:linear-gradient(135deg,#c4b5fd 0%,#a78bfa 50%,#8b6bff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.x-footer-brand .xb-ai{background:linear-gradient(135deg,#7c5cff 0%,#8b6bff 50%,#a78bfa 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.x-footer-tagline{font-size:11px;color:#8b8b9a;margin-top:2px}

.x-chat{width:600px}
.x-stream{display:flex;flex-direction:column;gap:10px;margin:8px 0 16px}
.x-msg{padding:10px 14px;border-radius:14px;max-width:85%}
.x-msg.ai_user{background:#181826;border:1px solid #2a2a40;align-self:flex-start;border-bottom-left-radius:4px}
.x-msg.player_ai{background:linear-gradient(135deg,#2a1e60,#0f3c45);align-self:flex-end;border-bottom-right-radius:4px}
.x-who{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:#8b8b9a;margin-bottom:4px}
.x-text{white-space:pre-wrap;word-wrap:break-word;font-size:13px}
.x-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #2a2a40;padding-top:12px}

/* Toastify */
.toastify{box-shadow:0 8px 32px rgba(124,92,255,.2);border-radius:10px;backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.08);font-family:inherit}
@media (max-width:640px){.toastify{left:10px !important;right:10px !important;width:auto;transform:none !important;max-width:calc(100vw - 20px)}}