/* Botclub Labs - shared look for the landing page, sign-in pages, student app and admin area.
   Colours are the existing Botclub learning app's own: page #eef2f8, white cards, navy #0f2640 / #1a3a5c / #234a73, accent #2f8fe0 / #5cc8ff, text #132a44. */
:root{
  --navy-0:#0f2640;--navy-1:#0f2640;--navy-2:#1a3a5c;--navy-3:#234a73;
  --blue:#2f8fe0;--cyan:#2f8fe0;--yellow:#d9a017;--green:#1f9d55;--red:#d9432b;--orange:#d9a017;
  --text:#132a44;--muted:#4c6178;--faint:#8195ab;
  --panel:#ffffff;--panel-2:#eef2f8;--line:#dbe4f0;--line-2:#c2d1e5;--field:#ffffff;--bg:#eef2f8;
  --radius:14px;--maxw:1120px;
}
/* dark navy areas (header, hero, finale, mock-ups): the old app's navy header colours */
.nav,.hero,.finale,.glow-card,.sketch,footer,.modal .box{
  --cyan:#5cc8ff;--text:#f2f7fc;--muted:rgba(242,247,252,.72);--faint:rgba(242,247,252,.5);
  --panel:rgba(255,255,255,.07);--panel-2:rgba(255,255,255,.12);--line:rgba(255,255,255,.14);--line-2:rgba(255,255,255,.24);--field:rgba(5,16,28,.45);
  color:var(--text);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:'Poppins',system-ui,-apple-system,Segoe UI,sans-serif;color:var(--text);font-size:15px;line-height:1.6;min-height:100vh;background:var(--bg)}
a{color:var(--cyan)}img{max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.hide{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- nav */
.nav{position:sticky;top:0;z-index:40;background:var(--navy-1);border-bottom:1px solid rgba(255,255,255,.1);box-shadow:0 4px 18px rgba(8,23,38,.22)}
.nav .wrap{display:flex;align-items:center;gap:22px;height:74px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff;font-weight:700;font-size:18px;letter-spacing:-.2px}
.brand{white-space:nowrap;flex:none}.brand img{display:block;height:50px;width:auto;border-radius:12px;background:#fff;padding:3px 12px;box-shadow:0 2px 10px rgba(0,0,0,.25)}
.brand b{color:#fff}
.links{display:flex;gap:6px;margin-left:14px}
.links a{color:var(--muted);text-decoration:none;font-size:14px;font-weight:500;padding:8px 13px;border-radius:99px;transition:.15s}.links a:hover{color:#fff;background:rgba(255,255,255,.1)}.links .only-m{display:none}
.sp{flex:1}
.nav .login{color:#fff;text-decoration:none;font-weight:600;font-size:14px;padding:9px 16px;border-radius:99px;border:1px solid rgba(255,255,255,.28);white-space:nowrap}.nav .login:hover{background:rgba(255,255,255,.1)}.nav .btn.primary{white-space:nowrap}
.menu-btn{display:none;background:none;border:1px solid var(--line-2);border-radius:10px;padding:6px 12px;cursor:pointer;color:#fff;font-size:18px;line-height:1.2}

/* ---------- buttons, badges */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;border:1px solid transparent;font-weight:600;font-size:14.5px;cursor:pointer;text-decoration:none;transition:.15s;white-space:nowrap}
.btn.primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(47,143,224,.32)}
.btn.primary:hover{background:#1d5fa0;transform:translateY(-1px)}
.btn.ghost{background:var(--panel);border-color:var(--line-2);color:var(--text)}.btn.ghost:hover{background:var(--panel-2)}
.btn.small{padding:8px 15px;font-size:13px;border-radius:10px}
.btn.danger{background:var(--red);color:#fff}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.nav .btn.primary{padding:9px 18px;font-size:13.5px}
.eyebrow{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan)}
.badge{display:inline-block;padding:3px 10px;border-radius:99px;font-size:11px;font-weight:700;letter-spacing:.04em}
.badge.gold{background:var(--navy-2);color:#fff}.badge.green{background:#e6f6ec;color:#1f9d55;border:1px solid #a9dcbc}
.badge.blue{background:#e6f1fc;color:#1d5fa0;border:1px solid #b5d5f3}.badge.red{background:#fdf3f1;color:#d9432b;border:1px solid #efc4bd}
.badge.grey{background:var(--panel-2);color:var(--muted);border:1px solid var(--line)}

/* ---------- hero */
.hero{padding:74px 0 64px;background:linear-gradient(120deg,var(--navy-1) 0%,var(--navy-2) 55%,var(--navy-3) 100%)}
.hero .wrap{display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center}
.hero h1{font-size:clamp(36px,5.2vw,58px);line-height:1.08;font-weight:700;letter-spacing:-1.2px;margin:14px 0 20px}
.grad{background:linear-gradient(90deg,#5cc8ff,#2f8fe0);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:17px;color:var(--muted);max-width:520px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 14px}
.micro{font-size:12.5px;color:var(--faint)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.glow-card{background:linear-gradient(135deg,var(--navy-1),var(--navy-2));border:1px solid var(--line-2);border-radius:20px;padding:20px;box-shadow:0 18px 44px rgba(15,38,64,.28)}
.qhead{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.num{width:26px;height:26px;border-radius:50%;background:var(--blue);display:grid;place-items:center;font-size:12px;font-weight:700;color:#fff}
.tag{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.qtext{font-size:14.5px;color:var(--text);margin-bottom:14px}
.sketch{background:rgba(5,16,28,.55);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.sketch svg{display:block;width:100%;height:auto}
.chip{display:inline-block;padding:2px 9px;border-radius:6px;font-size:10.5px;font-weight:700;letter-spacing:.08em;background:rgba(92,200,255,.18);color:#5cc8ff;margin-right:8px}

/* ---------- sections */
section.sec{padding:84px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 42px}
.sec-head h2{font-size:clamp(28px,3.6vw,42px);line-height:1.15;letter-spacing:-.8px;margin:10px 0 12px}
.sec-head p{color:var(--muted)}
.tabs{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:34px}
.tab{padding:8px 18px;border-radius:99px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;font-size:13.5px;font-weight:500}
.tab.on{border-color:var(--navy-2);color:#fff;background:var(--navy-2)}
.how{display:grid;grid-template-columns:1fr 1.05fr;gap:50px;align-items:center}
.how .step-n{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--cyan)}
.how h3{font-size:28px;line-height:1.2;letter-spacing:-.4px;margin:8px 0 12px}
.how p{color:var(--muted);margin-bottom:16px}
.ticks{list-style:none;display:grid;gap:8px}
.ticks li{display:flex;gap:10px;color:var(--text);font-size:14px}.ticks li::before{content:"✓";color:var(--green);font-weight:700}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.feat{background:var(--panel);border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:14px;padding:18px;transition:.15s}
.feat:hover{border-color:var(--line-2);transform:translateY(-2px)}
.feat .ic{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;margin-bottom:12px;background:#e6f1fc;color:#1d5fa0}
.feat .ic svg{width:18px;height:18px}
.feat h4{font-size:14.5px;margin-bottom:4px}.feat p{font-size:12.8px;color:var(--muted);line-height:1.5}
.feat:nth-child(3n){border-top-color:var(--yellow)}.feat:nth-child(3n) .ic{background:#fbf3dc;color:#8a6a10}.feat:nth-child(4n+2){border-top-color:var(--green)}.feat:nth-child(4n+2) .ic{background:#e6f6ec;color:var(--green)}

/* ---------- try it */
.try{display:grid;grid-template-columns:.9fr 1.1fr;gap:50px;align-items:center}
.try h2{font-size:clamp(28px,3.4vw,40px);line-height:1.15;letter-spacing:-.8px;margin:10px 0 14px}.try p{color:var(--muted);margin-bottom:16px}
.sliders{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:12px 0}
.sl label{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:4px}.sl label b{color:var(--text)}
input[type=range]{width:100%;accent-color:var(--cyan)}
.readout{display:flex;gap:10px;margin:8px 0 14px}.readout div{flex:1;background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:12px;color:var(--muted)}.readout b{display:block;font-size:18px;color:var(--text)}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:6px 0 12px}
.opt{padding:11px 14px;border-radius:11px;border:1px solid var(--line-2);background:var(--field);color:var(--text);cursor:pointer;text-align:left;font-size:14px}
.opt:hover:not(:disabled){border-color:var(--cyan)}
.opt.right{border-color:var(--green);background:#e6f6ec}.opt.wrong{border-color:var(--red);background:#fdf3f1}
.note{border-radius:11px;padding:11px 14px;font-size:13.5px;margin-top:4px}
.note.ok{background:#e6f6ec;border:1px solid #a9dcbc;color:#14632f}.note.no{background:#fbf3dc;border:1px solid #e8d08a;color:#6b5008}

/* ---------- pricing */
.prices{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch;max-width:980px;margin:0 auto}
.price{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:26px;display:flex;flex-direction:column}
.price.best{border-color:var(--blue);border-top-width:4px;box-shadow:0 18px 44px rgba(47,143,224,.2)}
.price .badge{position:absolute;top:-11px;right:18px}
.price h3{font-size:17px}.price .tg{font-size:12.5px;color:var(--muted);min-height:38px}
.price .amt{font-size:40px;font-weight:700;letter-spacing:-1px;margin:14px 0 2px}.price .amt small{font-size:13px;color:var(--muted);font-weight:500;letter-spacing:0}
.price ul{list-style:none;display:grid;gap:8px;margin:16px 0 22px;font-size:13.5px;color:var(--text);flex:1}
.price li{display:flex;gap:9px}.price li::before{content:"✓";color:var(--green);font-weight:700}
.price .btn{width:100%}
.fine{text-align:center;color:var(--faint);font-size:12.5px;margin-top:20px}

/* ---------- faq */
.faq{max-width:760px;margin:0 auto;display:grid;gap:10px}
.qa{background:var(--panel);border:1px solid var(--line);border-radius:13px}
.qa button{width:100%;background:none;border:none;text-align:left;padding:16px 18px;display:flex;justify-content:space-between;gap:14px;cursor:pointer;font-weight:600;font-size:14.5px}
.qa button::after{content:"+";color:var(--cyan);font-size:20px;line-height:1}.qa.open button::after{content:"–"}
.qa .a{display:none;padding:0 18px 16px;color:var(--muted);font-size:14px}.qa.open .a{display:block}

/* ---------- final cta + footer */
.finale{text-align:center;padding:70px 24px;margin:0 auto;max-width:900px;border-radius:24px;background:linear-gradient(120deg,var(--navy-1) 0%,var(--navy-2) 55%,var(--navy-3) 100%)}
.finale h2{font-size:clamp(26px,3.4vw,38px);letter-spacing:-.6px;margin-bottom:10px}.finale p{color:var(--muted);margin-bottom:24px}
footer{background:var(--navy-1);margin-top:64px;padding:44px 0 30px;color:var(--muted);font-size:13.5px;border-top:3px solid var(--blue)}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px;align-items:start}
footer .f-brand{display:block}footer .f-brand img{display:block;height:58px;width:auto;border-radius:14px;background:#fff;padding:5px 16px}
footer .f-note{margin-top:10px;max-width:340px;line-height:1.55}
footer h4{color:#fff;font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px}
footer nav{display:grid;gap:9px}footer a{color:var(--muted);text-decoration:none}footer a:hover{color:#fff}
footer .f-copy{grid-column:1/-1;border-top:1px solid var(--line);padding-top:18px;font-size:12.5px;color:var(--faint);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ---------- forms and auth pages */
.auth{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:34px 18px}
.auth .box{width:min(460px,100%);background:var(--panel);border:1px solid var(--line);border-top:4px solid var(--navy-2);border-radius:18px;padding:30px;box-shadow:0 14px 40px rgba(15,38,64,.12)}
.auth h1{font-size:25px;letter-spacing:-.4px}.auth .sub{color:var(--muted);font-size:14px;margin:4px 0 18px}
.f{display:block;margin-top:13px}.f>span{display:block;font-size:11.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.f input,.f select,.f textarea{width:100%;padding:12px 14px;border-radius:11px;border:1px solid var(--line-2);background:var(--field);color:var(--text)}
.f input:focus,.f select:focus,.f textarea:focus{outline:2px solid var(--cyan);outline-offset:0}
.f select option{color:#132a44}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.check{display:flex;gap:10px;align-items:flex-start;margin-top:16px;font-size:13px;color:var(--muted);line-height:1.5}.check input{margin-top:3px;accent-color:var(--cyan);width:17px;height:17px;flex:none}
.err{color:var(--red);font-size:13.5px;min-height:20px;margin-top:12px}.okmsg{color:var(--green);font-size:13.5px;margin-top:12px}
.auth .btn.primary{width:100%;margin-top:18px;padding:13px}
.alt{text-align:center;margin-top:16px;font-size:13.5px;color:var(--muted)}

/* ---------- student app + admin */
.app-wrap{max-width:1180px;margin:0 auto;padding:26px 24px 60px}
.app-top{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:6px}
.app-top h1{font-size:26px;letter-spacing:-.4px}
.subnav{display:flex;gap:8px;margin:14px 0 22px;flex-wrap:wrap}
.subnav a{padding:8px 16px;border-radius:99px;border:1px solid var(--line);color:var(--muted);text-decoration:none;font-size:13.5px;font-weight:500}
.subnav a{background:var(--panel)}.subnav a.on{background:var(--navy-2);border-color:var(--navy-2);color:#fff}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:18px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:15px 17px;position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--c,var(--cyan))}
.stat .l{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}.stat .v{font-size:25px;font-weight:700;letter-spacing:-.5px}.stat .s{font-size:12px;color:var(--faint)}
.class-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.cls{background:var(--panel);border:1px solid var(--line);border-top:4px solid var(--navy-2);border-radius:14px;padding:18px;text-decoration:none;color:var(--text);display:block;transition:.15s}
.cls:hover{border-color:var(--cyan);transform:translateY(-2px)}
.cls h3{font-size:20px}.cls .m{font-size:12.5px;color:var(--muted);margin:2px 0 12px}
.bar{height:8px;border-radius:99px;background:var(--panel-2);overflow:hidden}.bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--blue),#5cc8ff)}
.chapters{display:grid;gap:10px}
.ch{display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px 16px}
.ch .n{width:38px;height:38px;border-radius:11px;background:#e6f1fc;color:#1d5fa0;display:grid;place-items:center;font-weight:700}
.ch.locked .n{background:var(--panel-2);color:var(--faint)}.ch .t{font-weight:600;font-size:14.5px}.ch .meta{font-size:12px;color:var(--muted)}
.crumbs{margin-bottom:12px;font-size:13.5px}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;max-width:780px}
.tbl{width:100%;border-collapse:collapse;font-size:13.5px}.tbl th{text-align:left;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:9px 10px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:top}.tbl tr:hover td{background:#f6f9fc}
.tw{overflow:auto;border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.toast{position:fixed;right:18px;bottom:18px;background:var(--navy-2);color:#fff;padding:11px 16px;border-radius:12px;font-weight:600;box-shadow:0 10px 30px rgba(0,0,0,.4);z-index:99;max-width:80vw}
.empty{padding:30px;text-align:center;color:var(--muted)}
.demo-banner{background:#fbf3dc;border:1px solid #e8d08a;color:#6b5008;padding:9px 14px;border-radius:12px;font-size:13px;margin-bottom:14px}
.modal{position:fixed;inset:0;background:rgba(3,10,18,.72);display:grid;place-items:center;z-index:70;padding:18px}
.modal .box{width:min(440px,100%);background:var(--navy-2);border:1px solid var(--line-2);border-radius:18px;padding:26px}
.prose{max-width:760px;margin:0 auto;padding:46px 24px 30px}.prose h1{font-size:32px;margin-bottom:6px}.prose h2{font-size:19px;margin:26px 0 6px}.prose p,.prose li{color:var(--muted);margin-bottom:10px}.prose ul{padding-left:22px}
.review{background:#fbf3dc;border:1px solid #e8d08a;color:#6b5008;border-radius:12px;padding:10px 14px;font-size:13px;margin-bottom:22px}

/* ---------- small screens */
@media (max-width:980px){
  .hero .wrap,.how,.try{grid-template-columns:1fr}.hero{padding-top:44px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}.prices{grid-template-columns:1fr;max-width:460px}
}
@media (max-width:760px){
  .nav .wrap{gap:12px;height:62px}.brand img{height:42px;padding:3px 10px}.links{display:none;position:absolute;top:62px;left:0;right:0;flex-direction:column;gap:0;margin:0;background:var(--navy-1);border-bottom:1px solid var(--line);padding:6px 20px 14px;box-shadow:0 14px 24px rgba(8,23,38,.35)}.links a{border-radius:8px}.links .only-m{display:block}
  .links.open{display:flex}.links a{padding:12px 6px}.menu-btn{display:block}.nav .btn.primary{padding:8px 14px!important;font-size:13px!important}footer .wrap{grid-template-columns:1fr 1fr}footer .wrap>div:first-child{grid-column:1/-1}
  .nav .login{display:none}.sec-head{margin-bottom:28px}section.sec{padding:60px 0}
  .feat-grid{grid-template-columns:1fr}.sliders,.opts,.two{grid-template-columns:1fr}
  .ch{grid-template-columns:38px 1fr}.ch>:last-child{grid-column:1/-1}
}

/* ---------- admin: usage filters */
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:0 0 18px}
.flt{padding:9px 12px;border-radius:10px;border:1px solid var(--line-2);background:var(--field);color:var(--text)}