/* NexonIELTS website: same exam-room look as the app. White paper, navy ink, one red accent,
   a colour per band (5 blue, 6 green, 7 orange, 8 purple). */
:root{
  --bg:#F3F5F9; --surface:#FFFFFF; --surface2:#EDF0F5; --ink:#0E1A2B; --muted:#5A6577; --line:#DCE2EB;
  --primary:#0B2545; --on-primary:#FFFFFF; --accent:#D62839; --accent-bg:#FCE9EB; --focus:#2F6FEB;
  --hero:#0B2545; --hero2:#13315C; --on-hero:#FFFFFF; --hero-muted:#AFBCD4; --gold:#F2A900;
  --ok:#13804B; --ok-bg:#DFF3E8;
  --b5:#2563EB; --b6:#0F7A55; --b7:#C2410C; --b8:#6D3BB0;
  --shadow:0 1px 2px rgba(14,26,43,.05), 0 8px 24px rgba(14,26,43,.07);
  --f:"Inter","Noto Sans Devanagari","Noto Sans Gujarati","Noto Sans Gurmukhi",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0A111E; --surface:#121B2C; --surface2:#1B2540; --ink:#E8EDF6; --muted:#9AA6BC; --line:#25314A;
    --primary:#7FA6FF; --on-primary:#06101F; --accent:#FF5A6A; --accent-bg:#3A1A20; --focus:#9DBBFF;
    --hero:#13203A; --hero2:#1B2D52; --on-hero:#F3F6FB; --hero-muted:#A7B4CC; --gold:#F5B82E;
    --ok:#3BD38A; --ok-bg:#12352A;
    --b5:#3B7BF0; --b6:#1C9B6E; --b7:#E0581F; --b8:#8B5CD6;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0A111E; --surface:#121B2C; --surface2:#1B2540; --ink:#E8EDF6; --muted:#9AA6BC; --line:#25314A;
  --primary:#7FA6FF; --on-primary:#06101F; --accent:#FF5A6A; --accent-bg:#3A1A20; --focus:#9DBBFF;
  --hero:#13203A; --hero2:#1B2D52; --on-hero:#F3F6FB; --hero-muted:#A7B4CC; --gold:#F5B82E;
  --ok:#3BD38A; --ok-bg:#12352A;
  --b5:#3B7BF0; --b6:#1C9B6E; --b7:#E0581F; --b8:#8B5CD6;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
html,body{background:var(--bg);margin:0}
body{color:var(--ink);font:16px/1.6 var(--f);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
a{color:inherit}
img{max-width:100%;display:block}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.narrow{max-width:760px}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.mark{width:34px;height:34px;border-radius:10px;background:var(--accent);color:#fff;display:grid;place-items:center;font:800 19px/1 var(--f);box-shadow:inset 0 -3px 0 rgba(0,0,0,.18)}
.bname{font:700 19px/1 var(--f);letter-spacing:-.02em}
.bname b{font-weight:800;color:var(--accent)}
.nav{display:flex;align-items:center;gap:18px}
.nav a.lnk{text-decoration:none;font-weight:600;font-size:15px;color:var(--muted)}
.nav a.lnk:hover{color:var(--ink)}
@media (max-width:720px){.nav a.lnk{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 18px;border-radius:12px;border:1px solid transparent;background:var(--accent);color:#fff;font-weight:700;text-decoration:none;cursor:pointer;transition:transform .08s,filter .15s}
.btn:hover{filter:brightness(1.05)}
.btn:active{transform:scale(.98)}
.btn.big{min-height:56px;padding:12px 24px;font-size:17px;border-radius:14px}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.navy{background:var(--primary);color:var(--on-primary)}
.btn svg{width:18px;height:18px}

/* text */
.eyebrow{margin:0;font:700 12.5px/1.2 var(--f);text-transform:uppercase;letter-spacing:.12em;color:var(--accent)}
h1,h2,h3{letter-spacing:-.025em;text-wrap:balance;line-height:1.12}
.muted{color:var(--muted)}
.small{font-size:13.5px}

/* footer */
.foot{margin-top:56px;padding:28px 0 calc(28px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--line);font-size:14px;color:var(--muted)}
.foot .links{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;margin-bottom:10px}
.foot .links b{color:var(--ink);margin-right:6px}
.foot a{text-decoration:none}
.foot a:hover{color:var(--ink);text-decoration:underline}
.foot p{margin:6px 0 0;max-width:72ch}

/* legal and info pages */
.doc{padding-top:32px;max-width:760px}
.doc h1{font-size:clamp(30px,6vw,42px);margin:8px 0 6px}
.doc h2{font-size:21px;margin:30px 0 8px}
.doc p,.doc li{max-width:68ch}
.doc ul{padding-left:20px}
.doc li{margin:4px 0}
.updated{color:var(--muted);margin:0 0 18px}
.box{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow)}
.box dl{display:grid;grid-template-columns:max-content 1fr;gap:8px 18px;margin:0}
.box dt{font-weight:700}
.box dd{margin:0;overflow-wrap:anywhere}

/* welcome page */
.welcome{display:grid;gap:16px;justify-items:center;text-align:center;padding-top:34px;max-width:640px}
.tick{width:70px;height:70px;border-radius:50%;background:var(--ok);display:grid;place-items:center;box-shadow:0 0 0 8px var(--ok-bg)}
.tick svg{width:38px;height:38px}
.welcome h1{font-size:clamp(28px,6.5vw,40px);margin:0}
.welcome .lead{margin:0;color:var(--muted);max-width:52ch}
.welcome .btn.big{width:100%;max-width:420px}
.payid{margin:0;font-size:14px;color:var(--muted)}
.payid code{font-weight:700;color:var(--ink)}
.inapp{width:100%;background:var(--accent-bg);border:1px solid var(--accent);border-radius:16px;padding:14px 16px;display:grid;gap:10px;text-align:left}
.inapp p{margin:0}
.save{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%;text-align:left}
@media (max-width:560px){.save{grid-template-columns:1fr}}
.save h2{font-size:16px;margin:0 0 6px}
.save ol{margin:0;padding-left:20px}
.note{margin:0;font-size:14.5px;color:var(--muted);max-width:56ch}
.alt{font-weight:600;color:var(--muted)}