/* Blink Tech Online Classroom - design system (matches the Blink Tech website hero) */
:root{
  --g:#00c853;--g2:#00a651;--lime:#b6ff5c;--cyan:#35e0ff;--gold:#f5b800;--pink:#ff7ad9;
  --navy:#050a24;--navy2:#0b1438;--navy3:#101c4d;--line:rgba(255,255,255,.1);--muted:#9fb0d6;
  --ease:cubic-bezier(.2,.7,.2,1);--danger:#ff5d73;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--navy);color:#fff;font-family:'Manrope',Arial,sans-serif;font-size:16px;line-height:1.55;min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden}
a{color:var(--cyan);text-decoration:none}a:hover{color:var(--lime)}
h1,h2,h3,h4{font-family:'Space Grotesk',Arial,sans-serif;line-height:1.15;margin:0 0 .5em}
img{max-width:100%}
.mono{font-family:'JetBrains Mono',monospace}
.muted{color:var(--muted)}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
main{flex:1}
.bg-fx{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(1000px 600px at 85% 5%,rgba(0,200,83,.14),transparent 60%),radial-gradient(900px 600px at 0% 100%,rgba(53,224,255,.1),transparent 60%),linear-gradient(160deg,#04081d,#0a1235 55%,#050a24)}
#bgnet{position:fixed;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none;opacity:.55}

/* marquee */
.mq{overflow:hidden;background:linear-gradient(90deg,#00a651,#00c853 50%,#00a651);border-bottom:2px solid var(--gold);color:#04122a}
.mq-track{display:flex;width:max-content;animation:mq 50s linear infinite}
.mq:hover .mq-track{animation-play-state:paused}
.mq-g{display:flex;align-items:center;flex:none}
.mq-i{padding:9px 0;margin-right:28px;font-family:'Space Grotesk',sans-serif;font-size:13.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}
.mq-i b{color:#fff}.mq-d{width:7px;height:7px;transform:rotate(45deg);background:#04122a;margin-right:28px;flex:none}
@keyframes mq{to{transform:translateX(-50%)}}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(5,10,36,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:18px;color:#fff}
.brand .logo{width:40px;height:40px;border-radius:50%;box-shadow:0 0 0 2px var(--gold),0 0 18px rgba(0,200,83,.35)}
.brand .mark{width:36px;height:36px;border-radius:50%;background:#000a6b;border:1.5px solid var(--gold);display:grid;place-items:center;color:var(--lime);font-size:15px}
.brand small{display:block;font:500 10px 'JetBrains Mono',monospace;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.nav-links{display:flex;gap:6px;margin-left:auto;align-items:center}
.nav-links a{color:#dbe6ff;padding:8px 12px;border-radius:10px;font-weight:600;font-size:14.5px}
.nav-links a:hover,.nav-links a.on{background:rgba(255,255,255,.07);color:var(--lime)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);color:#fff;border-radius:10px;padding:8px 12px;font-size:18px;cursor:pointer}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:50px;border:1px solid transparent;font:700 14.5px 'Manrope',sans-serif;cursor:pointer;position:relative;overflow:hidden;transition:transform .25s var(--ease),box-shadow .25s,background .25s;color:#04122a;background:linear-gradient(135deg,var(--lime),var(--g));box-shadow:0 8px 26px rgba(0,200,83,.3)}
.btn:hover{transform:translateY(-2px);color:#04122a;box-shadow:0 12px 34px rgba(0,200,83,.45)}
.btn::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.55) 50%,transparent 70%);transform:translateX(-120%);transition:transform .7s}
.btn:hover::after{transform:translateX(120%)}
.btn.ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.22);box-shadow:none}
.btn.ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn.danger{background:linear-gradient(135deg,#ff8aa0,var(--danger));color:#2a0610;box-shadow:none}
.btn.sm{padding:7px 14px;font-size:13px}
.btn.block{width:100%}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* hero */
.hero{position:relative;padding:90px 0 70px;overflow:hidden;isolation:isolate}
.hero .grid-floor{position:absolute;left:-20%;right:-20%;bottom:-12%;height:55%;z-index:-1;background-image:linear-gradient(rgba(0,200,83,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(0,200,83,.3) 1px,transparent 1px);background-size:56px 56px;transform:perspective(520px) rotateX(62deg);transform-origin:50% 100%;-webkit-mask-image:linear-gradient(180deg,transparent,#000 80%);mask-image:linear-gradient(180deg,transparent,#000 80%);animation:gf 3.2s linear infinite;opacity:.5}
@keyframes gf{to{background-position:0 56px,0 0}}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:10px;padding:7px 16px;background:rgba(255,255,255,.06);border:1px solid rgba(0,200,83,.5);border-radius:60px;font:500 12px 'JetBrains Mono',monospace;letter-spacing:.08em;text-transform:uppercase;color:#d9ffe6;margin-bottom:22px}
.badge i{width:8px;height:8px;border-radius:50%;background:var(--g);animation:ping 2s ease-out infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(0,200,83,.8)}70%{box-shadow:0 0 0 12px rgba(0,200,83,0)}100%{box-shadow:0 0 0 0 rgba(0,200,83,0)}}
.hero h1{font-size:clamp(34px,5.2vw,62px);font-weight:700;letter-spacing:-.02em}
.grad{background:linear-gradient(100deg,var(--lime),var(--cyan),var(--lime));background-size:200% auto;-webkit-background-clip:text;background-clip:text;color:transparent;animation:sh 5s linear infinite}
@keyframes sh{to{background-position:200% center}}
.hero p.lead{font-size:18px;color:#c8d6f5;max-width:560px;margin:0 0 28px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.stats{display:flex;gap:30px;margin-top:38px;flex-wrap:wrap}
.stats b{display:block;font:700 30px 'Space Grotesk',sans-serif;color:var(--lime)}.stats span{font-size:13px;color:var(--muted)}

/* live room mock in hero */
.mock{background:rgba(8,15,48,.85);border:1px solid rgba(0,200,83,.4);border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.5),0 0 60px rgba(0,200,83,.15);overflow:hidden;transform:perspective(1000px) rotateY(-6deg) rotateX(3deg)}
.mock-bar{display:flex;gap:7px;align-items:center;padding:10px 14px;border-bottom:1px solid var(--line);font:500 12px 'JetBrains Mono',monospace;color:var(--muted)}
.mock-bar i{width:10px;height:10px;border-radius:50%;background:#ff5f56}.mock-bar i:nth-child(2){background:#ffbd2e}.mock-bar i:nth-child(3){background:#27c93f}
.mock-body{display:grid;grid-template-columns:1.6fr 1fr;min-height:260px}
.mock-vid{padding:14px;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.tile{border-radius:10px;background:linear-gradient(145deg,#12206a,#0a1235);display:grid;place-items:center;font:700 20px 'Space Grotesk';color:var(--lime);min-height:70px;position:relative}
.tile.big{grid-column:1/3;min-height:130px;border:1px solid rgba(0,200,83,.5)}
.tile small{position:absolute;left:8px;bottom:6px;font:500 10px 'JetBrains Mono';color:#cfe}
.mock-chat{border-left:1px solid var(--line);padding:12px;font-size:12.5px;display:flex;flex-direction:column;gap:8px}
.mock-chat p{margin:0;background:rgba(255,255,255,.06);padding:6px 10px;border-radius:10px}.mock-chat p b{color:var(--cyan)}

/* sections / cards */
.sec{padding:70px 0}
.sec h2{font-size:clamp(26px,3.4vw,40px)}
.eyebrow{font:500 12px 'JetBrains Mono',monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--g);display:block;margin-bottom:10px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:20px}
.card{background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.025));border:1px solid var(--line);border-radius:18px;padding:22px;backdrop-filter:blur(10px);transition:transform .3s var(--ease),border-color .3s,box-shadow .3s;position:relative}
.card.hover:hover{transform:translateY(-5px);border-color:rgba(0,200,83,.55);box-shadow:0 18px 50px rgba(0,0,0,.4),0 0 30px rgba(0,200,83,.12)}
.card h3{font-size:19px}
.hub{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;font:700 15px 'JetBrains Mono',monospace;color:var(--lime);background:#000a6b;border:1.5px solid var(--gold);margin-bottom:14px}
.price{font:700 24px 'Space Grotesk',sans-serif;color:var(--lime)}
.tag{display:inline-block;font:500 11px 'JetBrains Mono',monospace;padding:3px 10px;border-radius:30px;border:1px solid var(--line);color:var(--muted);margin-right:6px;text-transform:uppercase;letter-spacing:.06em}
.tag.gold{color:var(--gold);border-color:var(--gold)}.tag.green{color:var(--lime);border-color:rgba(0,200,83,.6)}.tag.red{color:var(--danger);border-color:var(--danger)}.tag.cyan{color:var(--cyan);border-color:var(--cyan)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;counter-reset:s}
.steps .card::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:20px;width:30px;height:30px;border-radius:50%;background:var(--g);color:#04122a;font:700 14px 'Space Grotesk';display:grid;place-items:center}
ul.tick{list-style:none;padding:0;margin:0}ul.tick li{padding:5px 0 5px 26px;position:relative}
ul.tick li::before{content:"✓";position:absolute;left:0;color:var(--g);font-weight:800}

/* forms */
.form{max-width:460px;margin:50px auto}
label{display:block;font:600 13px 'Manrope';color:#cfe0ff;margin:0 0 6px}
input[type=text],input[type=email],input[type=password],input[type=tel],input[type=number],input[type=date],input[type=datetime-local],input[type=url],select,textarea{width:100%;background:rgba(5,10,36,.7);border:1px solid rgba(255,255,255,.18);color:#fff;padding:12px 14px;border-radius:12px;font:500 15px 'Manrope',sans-serif;margin-bottom:16px;outline:none;transition:border-color .2s,box-shadow .2s}
input:focus,select:focus,textarea:focus{border-color:var(--g);box-shadow:0 0 0 3px rgba(0,200,83,.2)}
input[type=file]{margin-bottom:16px;color:var(--muted);max-width:100%}
select option{background:#0b1438}
textarea{min-height:100px;resize:vertical}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.alert{padding:12px 16px;border-radius:12px;margin:14px 0;border:1px solid;font-weight:600;font-size:14.5px}
.alert.ok{background:rgba(0,200,83,.12);border-color:rgba(0,200,83,.5);color:#d9ffe6}
.alert.err{background:rgba(255,93,115,.12);border-color:var(--danger);color:#ffd0d7}
.alert.info{background:rgba(53,224,255,.1);border-color:rgba(53,224,255,.5);color:#d6f7ff}

/* tables */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px}
table.tbl{width:100%;border-collapse:collapse;font-size:14.5px}
.tbl th{font:500 11.5px 'JetBrains Mono',monospace;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);text-align:left;padding:12px 14px;background:rgba(255,255,255,.04);white-space:nowrap}
.tbl td{padding:12px 14px;border-top:1px solid var(--line);vertical-align:top}
.tbl tr:hover td{background:rgba(255,255,255,.025)}
.tbl form{display:inline}

/* dashboard layout */
.dash{display:grid;grid-template-columns:240px 1fr;gap:28px;padding:34px 0 60px}
.side{position:sticky;top:90px;align-self:start;display:flex;flex-direction:column;gap:4px}
.side a{padding:10px 14px;border-radius:12px;color:#cfe0ff;font-weight:600;display:flex;gap:10px;align-items:center}
.side a:hover,.side a.on{background:rgba(0,200,83,.12);color:var(--lime)}
.side h5{margin:14px 14px 4px;font:500 11px 'JetBrains Mono';letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin-bottom:26px}
.kpi b{display:block;font:700 30px 'Space Grotesk';color:var(--lime)}.kpi span{color:var(--muted);font-size:13px}
.page-h{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.page-h h1{font-size:30px;margin:0}
.live-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#ff3b5c;margin-right:6px;animation:ping2 1.4s infinite}
@keyframes ping2{0%{box-shadow:0 0 0 0 rgba(255,59,92,.8)}70%{box-shadow:0 0 0 10px rgba(255,59,92,0)}100%{box-shadow:0 0 0 0 rgba(255,59,92,0)}}

footer.foot{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:14px;margin-top:40px;background:rgba(0,0,0,.2)}
footer.foot .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* certificate */
.cert{background:#fff;color:#0b1438;max-width:900px;margin:30px auto;padding:50px;border:10px double #00a651;text-align:center;font-family:'Space Grotesk',sans-serif}
.cert h1{font-size:44px;color:#000a6b;margin:10px 0}.cert .nm{font-size:38px;border-bottom:2px solid #f5b800;display:inline-block;padding:0 30px;margin:14px 0}
.cert p{color:#334}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}.mock{transform:none}
  .dash{grid-template-columns:1fr}.side{position:static;flex-direction:row;flex-wrap:wrap}.side h5{display:none}
  .burger{display:block}.nav-links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:#050a24;padding:12px 24px 18px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .row2{grid-template-columns:1fr}
}
@media print{.mq,.nav,footer.foot,.noprint,#bgnet,.bg-fx{display:none!important}body{background:#fff}.cert{margin:0;border-width:8px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}

.gwbadge{display:inline-block;font:700 11px 'JetBrains Mono',monospace;padding:3px 10px;border-radius:30px;letter-spacing:.08em}
.gwbadge.test{background:rgba(245,184,0,.18);color:var(--gold);border:1px solid var(--gold)}.gwbadge.live{background:rgba(0,200,83,.18);color:var(--lime);border:1px solid var(--g)}
.bday{background:linear-gradient(120deg,rgba(245,184,0,.2),rgba(255,122,217,.18));border:1px solid rgba(245,184,0,.6);border-radius:18px;padding:18px 22px;margin-bottom:20px;font-size:18px}
.vid{aspect-ratio:16/9;width:100%;border:0;border-radius:16px;background:#000}
.playlist a{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:12px;color:#dbe6ff;border:1px solid transparent}
.playlist a:hover{background:rgba(255,255,255,.06)}.playlist a.on{background:rgba(0,200,83,.14);border-color:rgba(0,200,83,.5);color:#fff}
.playlist .dn{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--muted);display:grid;place-items:center;font-size:12px;flex:none}.playlist .dn.y{background:var(--g);border-color:var(--g);color:#04122a}
.prog{height:8px;background:rgba(255,255,255,.1);border-radius:10px;overflow:hidden;margin:8px 0}.prog i{display:block;height:100%;background:linear-gradient(90deg,var(--g),var(--lime))}
.lesson-box{background:rgba(255,255,255,.04);border:1px dashed rgba(255,255,255,.2);border-radius:12px;padding:12px 14px;margin:8px 0;font-size:14.5px}
.lesson-box b{color:var(--lime)}

/* part payment */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:18px 0}
.plan{display:block;padding:16px 20px;border:1.5px solid var(--line);border-radius:16px;color:#fff;background:rgba(255,255,255,.04)}
.plan b{display:block;font:700 17px 'Space Grotesk'}.plan span{color:var(--muted);font-size:14px}
.plan.on{border-color:var(--g);background:rgba(0,200,83,.12);box-shadow:0 0 0 3px rgba(0,200,83,.15)}
.owing{border-color:rgba(245,184,0,.6)!important;background:linear-gradient(160deg,rgba(245,184,0,.12),rgba(255,255,255,.02))!important}
.owing.late{border-color:rgba(255,59,92,.7)!important;background:linear-gradient(160deg,rgba(255,59,92,.14),rgba(255,255,255,.02))!important}
.vthumb{aspect-ratio:16/9;border-radius:12px;background:#02051a center/cover no-repeat;display:grid;place-items:center;margin-bottom:10px;position:relative;overflow:hidden}
.vthumb:after{content:'▶';width:46px;height:46px;border-radius:50%;background:rgba(0,200,83,.9);color:#04122a;display:grid;place-items:center;font-size:18px;padding-left:3px}

/* ---- mobile admin / dashboard fixes ---- */
.dash>section,.dash>div{min-width:0}
img,video,canvas,svg{max-width:100%}
input,select,textarea{max-width:100%}
@media (max-width:900px){
  .wrap{padding:0 16px}
  .dash{gap:14px;padding:14px 0 40px}
  .side{position:sticky;top:68px;z-index:20;flex-direction:row;flex-wrap:nowrap;overflow-x:auto;gap:6px;padding:8px;margin:0 -16px;background:rgba(5,10,36,.95);border-bottom:1px solid var(--line);-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .side::-webkit-scrollbar{display:none}
  .side a{flex:0 0 auto;white-space:nowrap;padding:8px 13px;font-size:14px;border:1px solid var(--line);border-radius:30px}
  .side a.on{border-color:rgba(0,200,83,.6)}
  .side a span{display:none}
  .page-h{margin-bottom:14px}.page-h h1{font-size:23px}
  .kpis{grid-template-columns:1fr 1fr;gap:10px}.kpi b{font-size:24px}
  .card{padding:16px}
  .cards{grid-template-columns:1fr}
  .tbl th,.tbl td{padding:10px}
  .tbl-wrap{margin-left:0;margin-right:0;-webkit-overflow-scrolling:touch}
  .page-h>div,.page-h form{max-width:100%}
  .page-h form{flex-wrap:wrap}
  table.tbl td form{display:flex;flex-wrap:wrap;gap:4px}
  .tbl td input,.tbl td select{min-width:0;max-width:100%}
  .lesson-box,.card p,.card h3{overflow-wrap:anywhere}
  .mono{overflow-wrap:anywhere}
  h1{overflow-wrap:anywhere}
}
@media (max-width:480px){
  .tbl th:nth-child(n+4),.tbl td:nth-child(n+4){white-space:normal}
  .btn{padding:10px 16px}
  .plans{grid-template-columns:1fr}
  .kpis{grid-template-columns:1fr 1fr}
}