/* SkillRush Cyber Guardians v4 — dark neon theme (carried over from v3)
   Used by both the dashboard and the student screens. */

:root{
  /* surfaces */
  --bg:#0A0A0F; --bg2:#12121C; --card:#171723; --card2:#1c1c2b;
  --line:#232336; --line2:#2b2b40;
  /* neon accents */
  --cyan:#00F0FF; --green:#39FF14; --mag:#FF2D95; --yel:#FFE600; --violet:#A97BFF;
  --cyan-ink:#03222a; --green-ink:#06210a; --mag-ink:#2a0013; --yel-ink:#2b2400;
  /* text */
  --white:#ffffff; --body:#cfcfe0; --muted:#8A8AA0; --dim:#6a6a80;
  --r:14px; --r-sm:10px;
  --glow-cyan:0 0 0 1px rgba(0,240,255,.35), 0 8px 30px rgba(0,240,255,.18);
  --shadow:0 18px 46px rgba(0,0,0,.45);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Trebuchet MS','Segoe UI',system-ui,-apple-system,Roboto,"Noto Sans","Noto Sans Devanagari",Arial,sans-serif;
  background:radial-gradient(1200px 700px at 50% -12%,#1a1a2e 0%,var(--bg) 62%) fixed;
  color:var(--body); font-size:15px; line-height:1.55; min-height:100vh;
  -webkit-text-size-adjust:100%;
}
a{color:var(--cyan); text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{color:var(--white); margin:0 0 .5em; line-height:1.25}
h1{font-size:24px; font-weight:800}
h2{font-size:19px; font-weight:700}
h3{font-size:16px; font-weight:700}
p{margin:0 0 1em}
small{font-size:12.5px}
code{background:#0d0d16; color:var(--cyan); padding:2px 6px; border-radius:5px; font-size:12.5px; border:1px solid var(--line)}
hr{border:0; border-top:1px solid var(--line); margin:22px 0}
::placeholder{color:var(--dim)}
::selection{background:rgba(0,240,255,.28)}

/* ---------------- dashboard shell ---------------- */
.shell{display:flex; min-height:100vh}
.side{
  width:238px; flex:0 0 238px; background:#0d0d15; border-right:1px solid var(--line);
  color:var(--body); display:flex; flex-direction:column; position:sticky; top:0; height:100vh; overflow-y:auto;
}
.side .brand{padding:20px 18px 14px; border-bottom:1px solid var(--line)}
.side .brand b{display:block; color:var(--cyan); font-size:16px; letter-spacing:1.6px; text-transform:uppercase}
.side .brand span{display:block; font-size:11.5px; color:var(--muted); margin-top:3px; letter-spacing:.4px}
.side nav{padding:12px 10px; flex:1}
.side .grp{font-size:10.5px; text-transform:uppercase; letter-spacing:.14em; color:var(--dim); padding:15px 10px 6px}
.side a{
  display:flex; align-items:center; gap:10px; color:var(--body); padding:9px 11px;
  border-radius:var(--r-sm); font-size:14px; margin-bottom:2px; text-decoration:none; border:1px solid transparent;
}
.side a:hover{background:var(--card); color:var(--white); text-decoration:none; border-color:var(--line2)}
.side a.on{background:rgba(0,240,255,.11); color:var(--cyan); font-weight:700; border-color:rgba(0,240,255,.4)}
.side a .ic{width:18px; text-align:center; opacity:.95}
.side .who{padding:12px 16px; border-top:1px solid var(--line); font-size:12px}
.side .who b{color:var(--white); display:block; font-size:13px}
.side .who .role{color:var(--muted)}
.side .who a{display:inline; padding:0; color:var(--mag); font-size:12px; border:0}
.side .who a:hover{background:none}

.main{flex:1; min-width:0; display:flex; flex-direction:column}
.topbar{
  background:rgba(13,13,21,.92); backdrop-filter:blur(8px); border-bottom:1px solid var(--line);
  padding:14px 26px; display:flex; align-items:center; gap:14px; flex-wrap:wrap; position:sticky; top:0; z-index:20;
}
.topbar h1{margin:0; font-size:19px}
.topbar .sp{flex:1}
.wrap{padding:24px 26px 64px; max-width:1320px; width:100%}
.burger{display:none; background:var(--card); color:var(--white); border:1px solid var(--line2); border-radius:9px; padding:7px 11px; font-size:16px; cursor:pointer}

/* ---------------- cards / tables ---------------- */
.card{background:var(--bg2); border:1px solid var(--line); border-radius:var(--r); box-shadow:var(--shadow); padding:20px; margin-bottom:20px}
.card.pad0{padding:0}
.card.is-primary{background:rgba(0,240,255,.05); border-color:rgba(0,240,255,.32)}
.card h2{margin-bottom:14px}
.card .hd{padding:16px 20px; border-bottom:1px solid var(--line); display:flex; align-items:center; gap:12px; flex-wrap:wrap}
.card .hd h2{margin:0}
.card .bd{padding:20px}

.grid{display:grid; gap:16px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

.stat{background:var(--bg2); border:1px solid var(--line); border-radius:var(--r); padding:16px 18px; box-shadow:var(--shadow)}
.stat .k{font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:.12em}
.stat .v{font-size:30px; font-weight:800; color:var(--cyan); line-height:1.15; margin-top:4px}
.stat .s{font-size:12.5px; color:var(--muted)}
.stat:nth-child(2) .v{color:var(--green)}
.stat:nth-child(3) .v{color:var(--yel)}
.stat:nth-child(4) .v{color:var(--mag)}

table{width:100%; border-collapse:collapse; font-size:14px}
th{text-align:left; font-size:11px; text-transform:uppercase; letter-spacing:.1em; color:var(--muted); font-weight:700; padding:11px 14px; border-bottom:1px solid var(--line2); white-space:nowrap; background:#101019}
td{padding:12px 14px; border-bottom:1px solid var(--line); vertical-align:middle; color:var(--body)}
td strong{color:var(--white)}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(0,240,255,.045)}
.tbl-wrap{overflow-x:auto}
.num{text-align:right; font-variant-numeric:tabular-nums}
.nowrap{white-space:nowrap}

/* ---------------- forms ---------------- */
label{display:block; font-size:13px; font-weight:700; color:var(--white); margin-bottom:6px}
/* small grey "(optional)" note inside a label — deliberately NOT called .opt,
   which belongs to the student's answer buttons */
label .optional{font-weight:400; color:var(--muted); font-size:12.5px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],
input[type=search],input[type=tel],input[type=datetime-local],input[type=date],select,textarea{
  width:100%; padding:11px 13px; border:2px solid var(--line2); border-radius:var(--r-sm);
  font:inherit; font-size:14.5px; color:var(--white); background:var(--card);
}
input[type=file]{width:100%; font:inherit; font-size:13.5px; color:var(--body); padding:9px 0}
input[type=file]::file-selector-button{
  background:var(--card2); color:var(--cyan); border:1px solid var(--line2); border-radius:8px;
  padding:8px 14px; margin-right:12px; font:inherit; font-size:13px; font-weight:700; cursor:pointer;
}
textarea{min-height:80px; resize:vertical}
select{appearance:none; background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 19px) 50%,calc(100% - 13px) 50%; background-size:6px 6px,6px 6px; background-repeat:no-repeat; padding-right:38px}
select option{background:var(--card); color:var(--white)}
input:focus,select:focus,textarea:focus{outline:none; border-color:var(--cyan); box-shadow:0 0 0 3px rgba(0,240,255,.16)}
input[disabled],select[disabled],textarea[disabled]{background:#101018; color:var(--dim); border-color:var(--line)}
.field{margin-bottom:16px}
.hint{font-size:12.5px; color:var(--muted); margin-top:6px}
.row{display:flex; gap:14px; flex-wrap:wrap}
.row > *{flex:1; min-width:180px}
.check{display:flex; gap:10px; align-items:flex-start; font-size:14px; font-weight:400; color:var(--body); cursor:pointer}
.check input{width:auto; margin-top:3px; flex:0 0 auto; accent-color:var(--cyan)}

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:7px;
  background:var(--cyan); color:var(--cyan-ink); border:2px solid var(--cyan); padding:10px 18px;
  border-radius:var(--r-sm); font:inherit; font-size:14.5px; font-weight:700; cursor:pointer;
  text-decoration:none; letter-spacing:.3px; transition:.13s;
}
.btn:hover{background:#5df6ff; border-color:#5df6ff; color:var(--cyan-ink); text-decoration:none; transform:translateY(-1px); box-shadow:0 8px 22px rgba(0,240,255,.25)}
.btn.sec{background:transparent; color:var(--body); border-color:var(--line2)}
.btn.sec:hover{background:var(--card); color:var(--white); border-color:var(--cyan); box-shadow:none}
.btn.ok{background:var(--green); border-color:var(--green); color:var(--green-ink)}
.btn.ok:hover{background:#6bff52; border-color:#6bff52; color:var(--green-ink); box-shadow:0 8px 22px rgba(57,255,20,.25)}
.btn.danger{background:var(--mag); border-color:var(--mag); color:#fff}
.btn.danger:hover{background:#ff5aad; border-color:#ff5aad; box-shadow:0 8px 22px rgba(255,45,149,.25)}
.btn.sm{padding:6px 12px; font-size:13px; border-width:1.5px}
.btn.lg{padding:14px 28px; font-size:16.5px; border-radius:12px}
.btn[disabled],.btn.off{opacity:.35; pointer-events:none; transform:none; box-shadow:none}
.btn-row{display:flex; gap:10px; flex-wrap:wrap; align-items:center}

/* ---------------- bits ---------------- */
.pill{display:inline-block; padding:3px 10px; border-radius:999px; font-size:11px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; border:1px solid transparent}
.pill.gray{background:#20202e; color:var(--muted); border-color:var(--line2)}
.pill.blue{background:rgba(0,240,255,.12); color:var(--cyan); border-color:rgba(0,240,255,.4)}
.pill.green{background:rgba(57,255,20,.12); color:var(--green); border-color:rgba(57,255,20,.4)}
.pill.amber{background:rgba(255,230,0,.12); color:var(--yel); border-color:rgba(255,230,0,.4)}
.pill.red{background:rgba(255,45,149,.13); color:var(--mag); border-color:rgba(255,45,149,.4)}
.pill.purple{background:rgba(169,123,255,.14); color:var(--violet); border-color:rgba(169,123,255,.42)}

.note{border-radius:var(--r-sm); padding:13px 16px; font-size:14px; margin-bottom:18px; border:1px solid; border-left-width:4px}
.note.ok{background:rgba(57,255,20,.07); border-color:rgba(57,255,20,.45); color:#b6ffa8}
.note.err{background:rgba(255,45,149,.08); border-color:rgba(255,45,149,.5); color:#ffb3d7}
.note.warn{background:rgba(255,230,0,.07); border-color:rgba(255,230,0,.45); color:#ffef8a}
.note.info{background:rgba(0,240,255,.07); border-color:rgba(0,240,255,.42); color:#a8f2ff}
.note a{color:inherit; text-decoration:underline}
.note strong{color:#fff}

.empty{text-align:center; padding:46px 20px; color:var(--muted)}
.empty .big{font-size:34px; margin-bottom:8px; opacity:.45}

.filters{display:flex; gap:10px; flex-wrap:wrap; align-items:flex-end; margin-bottom:18px}
.filters .field{margin-bottom:0; min-width:150px}
.filters label{font-size:10.5px; text-transform:uppercase; letter-spacing:.1em; color:var(--muted); font-weight:700}

.pager{display:flex; gap:6px; align-items:center; justify-content:center; padding:16px; flex-wrap:wrap}
.pager a,.pager span{padding:6px 12px; border:1px solid var(--line2); border-radius:8px; font-size:13px; background:var(--card); color:var(--body)}
.pager a:hover{border-color:var(--cyan); color:var(--cyan); text-decoration:none}
.pager .cur{background:var(--cyan); color:var(--cyan-ink); border-color:var(--cyan); font-weight:700}

/* ---------------- public / student ---------------- */
/* matrix rain sits behind the whole page and is never interactive */
#matrix-bg{position:fixed; inset:0; width:100%; height:100%; z-index:0;
  pointer-events:none; opacity:.22; display:block}
/* Reduced motion is handled in matrix.js by drawing a single still frame,
   so the canvas stays visible — it simply stops moving. */
@media print{#matrix-bg{display:none}}
.pub{position:relative; z-index:1; min-height:100vh; display:flex; flex-direction:column}
.shell{position:relative; z-index:1}
.logobar{display:flex; align-items:center; justify-content:space-between; gap:14px; padding:16px 18px; max-width:900px; margin:0 auto; width:100%}
.logobar .slot{height:52px; flex:0 0 auto; display:flex; align-items:center; justify-content:center; border-radius:12px}
/* both logos render at the SAME height; width follows the artwork */
.logobar .slot img{height:52px; width:auto; max-width:none; object-fit:contain; display:block}
.logobar .slot.ph{border:1px dashed var(--line2); color:var(--dim); font-size:10px; letter-spacing:.14em; text-transform:uppercase; padding:0 16px; text-align:center; min-width:112px}
.logobar .mid{text-align:center; flex:1 1 auto; min-width:0; overflow:hidden}
a.mid{text-decoration:none; border-radius:10px; padding:4px 8px; transition:.12s}
a.mid:hover{background:rgba(0,240,255,.07); text-decoration:none}
a.mid:hover b{text-shadow:0 0 18px rgba(0,240,255,.5)}
.foot a{color:var(--muted); text-decoration:none}
.foot a:hover{color:var(--cyan)}
.logobar .mid b{display:block; font-size:15px; color:var(--cyan); letter-spacing:1.8px; text-transform:uppercase}
.logobar .mid span{font-size:11px; color:var(--muted); letter-spacing:.5px}

.pubwrap{flex:1; width:100%; max-width:580px; margin:0 auto; padding:8px 18px 40px}
.panel{background:var(--bg2); border:1px solid var(--line); border-radius:20px; padding:28px 24px; box-shadow:var(--shadow)}
.panel h1{font-size:23px; text-align:center}
.panel .lead{text-align:center; color:var(--muted); margin-bottom:20px}

.code-big{
  font-size:42px; font-weight:800; letter-spacing:.16em; text-align:center; color:var(--cyan);
  background:#0d0d16; border:1px solid rgba(0,240,255,.35); border-radius:16px; padding:18px;
  font-variant-numeric:tabular-nums; text-shadow:0 0 24px rgba(0,240,255,.5);
}

.qcard{background:var(--bg2); border:1px solid var(--line); border-radius:20px; padding:24px 20px; box-shadow:var(--shadow)}
.qmeta{display:flex; justify-content:space-between; align-items:center; font-size:12px; color:var(--muted); margin-bottom:12px; letter-spacing:1.4px; text-transform:uppercase}
.qmeta b{color:var(--mag)}
.qmeta .sc b{color:var(--green); font-size:17px}
.qtext{font-size:21px; font-weight:700; color:var(--white); line-height:1.35; margin-bottom:20px}

/* Student answer buttons. Scoped under .opts so the class can never leak into
   labels or anything else on the page. */
.opts{display:grid; gap:12px}
.opts .opt{
  display:flex; gap:13px; align-items:center; text-align:left; width:100%;
  background:var(--card); border:2px solid var(--line2); border-radius:14px; padding:15px 16px;
  font:inherit; font-size:16px; color:var(--white); cursor:pointer; transition:.12s; line-height:1.3;
}
.opts .opt:hover:not(:disabled){border-color:var(--cyan); transform:translateY(-2px); box-shadow:0 8px 22px rgba(0,240,255,.14)}
.opts .opt .k{flex:0 0 30px; height:30px; border-radius:9px; background:#23233a; color:var(--cyan); display:flex; align-items:center; justify-content:center; font-weight:800; font-size:14px}
.opts .opt.right{border-color:var(--green); background:rgba(57,255,20,.12); color:#d6ffcc}
.opts .opt.right .k{background:var(--green); color:var(--green-ink)}
.opts .opt.wrong{border-color:var(--mag); background:rgba(255,45,149,.12); color:#ffd0e8}
.opts .opt.wrong .k{background:var(--mag); color:var(--mag-ink)}
.opts .opt:disabled{cursor:default; transform:none; box-shadow:none}

.timer{height:8px; background:#23233a; border-radius:99px; overflow:hidden; margin-bottom:18px}
.timer i{display:block; height:100%; background:linear-gradient(90deg,var(--green),var(--cyan)); width:100%; transition:width .25s linear}

.explain{margin-top:18px; background:#10101b; border-left:4px solid var(--cyan); border-radius:9px; padding:13px 16px; font-size:14.5px; color:var(--body); line-height:1.5}

.lb{list-style:none; margin:0; padding:0}
.lb li{display:flex; align-items:center; gap:12px; padding:10px 13px; border-radius:11px; font-size:14.5px; background:var(--card); border:1px solid var(--line)}
.lb li + li{margin-top:6px}
.lb li.me{background:rgba(0,240,255,.1); border-color:rgba(0,240,255,.45); font-weight:700}
.lb .r{flex:0 0 30px; height:30px; border-radius:9px; background:#23233a; color:var(--muted); display:flex; align-items:center; justify-content:center; font-weight:800; font-size:13px}
.lb li:nth-child(1) .r{background:var(--yel); color:var(--yel-ink)}
.lb li:nth-child(2) .r{background:#c9cbe0; color:#22222f}
.lb li:nth-child(3) .r{background:var(--mag); color:#fff}
.lb .n{flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; color:var(--white)}
.lb .s{font-weight:800; color:var(--green); font-variant-numeric:tabular-nums}

.scorebig{text-align:center; padding:8px 0 16px}
.scorebig .t{font-size:12px; text-transform:uppercase; letter-spacing:.16em; color:var(--muted)}
.scorebig .v{font-size:64px; font-weight:800; color:var(--green); line-height:1.02; text-shadow:0 0 30px rgba(57,255,20,.35)}
.scorebig .badge{display:inline-block; margin-top:10px; background:rgba(169,123,255,.14); color:var(--violet); border:1px solid rgba(169,123,255,.5); font-weight:800; padding:7px 18px; border-radius:999px; font-size:14px; letter-spacing:.08em; text-transform:uppercase}

.share{display:grid; grid-template-columns:repeat(4,1fr); gap:9px; margin-top:8px}
.share a,.share button{
  display:flex; flex-direction:column; align-items:center; gap:6px; padding:12px 4px;
  border-radius:12px; border:1px solid var(--line2); background:var(--card); color:var(--body);
  font:inherit; font-size:11.5px; font-weight:700; cursor:pointer; text-decoration:none; transition:.12s;
}
.share a:hover,.share button:hover{background:var(--card2); border-color:var(--cyan); color:var(--white); text-decoration:none; transform:translateY(-2px)}
.share .ic{font-size:20px; line-height:1}
.sharecard{margin-top:14px; border:1px solid var(--line2); border-radius:14px; overflow:hidden; background:#0d0d16}
.sharecard img{display:block; width:100%; height:auto}

.qr{background:#fff; padding:12px; border-radius:14px; display:inline-block}
.qr img{display:block; width:200px; height:200px}

.foot{text-align:center; font-size:11.5px; color:var(--dim); padding:20px}
.foot a{color:var(--muted)}

/* ---------------- responsive ---------------- */
@media (max-width:900px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .g3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .logobar{padding:12px 12px; gap:10px}
  .logobar .slot, .logobar .slot img{height:36px}
  .logobar .mid b{font-size:13px}
  .logobar .mid span{display:none}
  .side{position:fixed; left:-262px; z-index:60; transition:left .2s; box-shadow:0 0 50px rgba(0,0,0,.6)}
  .side.open{left:0}
  .burger{display:inline-block}
  .wrap{padding:18px 15px 54px}
  .topbar{padding:12px 15px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .qtext{font-size:19px}
  .scorebig .v{font-size:54px}
}
@media print{
  .side,.topbar,.no-print{display:none !important}
  body{background:#fff; color:#000}
  .card{box-shadow:none; border:1px solid #ccc}
}


/* ------------------------------------------------------------------ */
/*  LANDING PAGE  (60 : 40)                                            */
/* ------------------------------------------------------------------ */
.pubwrap.home{max-width:1080px}
.home-grid{display:grid; grid-template-columns:60fr 40fr; gap:22px; align-items:start}
.home-main{min-width:0}
.home-side{min-width:0; position:sticky; top:14px}

.backbar{display:flex; align-items:center; gap:10px; margin:0 0 16px}
.backbar .btn{flex:0 0 auto}
@media (max-width:560px){.backbar .btn{width:100%; text-align:center}}

.home-h{font-size:19px; margin:24px 0 2px; color:var(--white)}
.home-sub{color:var(--muted); font-size:14px; margin:0 0 14px}

.qtile-wrap{margin-bottom:14px}
.qtile{display:block; background:var(--card); border:1px solid var(--line2);
  border-radius:14px; padding:16px 18px; text-decoration:none; transition:.12s}
.qtile:hover{border-color:var(--cyan); transform:translateY(-2px); text-decoration:none}
.qtile-row{display:flex; align-items:center; gap:12px; flex-wrap:wrap}
.qtile-body{flex:1; min-width:170px}
.qtile-title{font-size:17px; font-weight:700; color:var(--white)}
.qtile-desc{font-size:13px; color:var(--muted); margin-top:2px}
.qtile-meta{margin-top:8px; font-size:12px; color:var(--muted);
  display:flex; flex-wrap:wrap; gap:5px; align-items:center}
.qtile-played{margin-left:2px}
.qtile-cta{flex:0 0 auto}
.qtile-links{text-align:right; margin:5px 2px 0}
.qtile-links a{font-size:12px; color:var(--muted)}

.home-links{margin-top:22px; padding:16px 18px; text-align:center; font-size:14px}
.home-links span{color:var(--line2); margin:0 6px}

.home-board{padding:22px 20px}
.board-pick{margin-bottom:14px; display:flex; gap:8px}
.board-pick select{width:100%}
.board-count{font-size:13px; color:var(--muted); margin-bottom:10px}
.board-count b{color:var(--green); font-size:16px; font-variant-numeric:tabular-nums}
.board-list{margin:0}
.board-city{display:block; font-style:normal; font-size:11px; color:var(--muted)}
.board-more{width:100%; margin-top:14px; text-align:center}
.sr-only{position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap}

@media (max-width:880px){
  .home-grid{grid-template-columns:1fr; gap:18px}
  .home-side{position:static; order:2}
  .home-main{order:1}
}