/* ============================================================
   HT CTF — design system, matched to hackingt.com
   Brand: #04fb6c neon on #0a0a0a · green-tinted borders ·
   Changa display · pill buttons · soft glow · generous space
   ============================================================ */
:root{
  --bg:#0a0a0a; --bg-2:#071009;
  --panel-a:#0b1713; --panel-b:#061009;
  --line:rgba(4,251,108,.14);       /* brand: faint green border */
  --line-soft:rgba(4,251,108,.07);
  --line-strong:rgba(4,251,108,.32);
  --neon:#04fb6c; --neon-ink:#04150c; /* dark-green text on neon */
  --neon-dim:rgba(4,251,108,.07); --neon-dim2:rgba(4,251,108,.12);
  --neon-glow:rgba(4,251,108,.45);
  --fg:#e8f3ec; --muted:#9fb3a9; --dim:#6b7f76;
  --t-beginner:#04fb6c; --t-intermediate:#ffc247; --t-advanced:#ff9f45; --t-expert:#ff5c7a;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"IBM Plex Sans Arabic",system-ui,sans-serif;
  --display:"Changa",var(--sans);
  --r:16px; --r-lg:22px; --pill:999px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--fg); font-family:var(--sans); line-height:1.7;
  background-image:
    radial-gradient(900px 520px at 72% -8%, rgba(4,251,108,.10), transparent 60%),
    radial-gradient(760px 480px at 12% 8%, rgba(4,251,108,.05), transparent 55%),
    radial-gradient(1000px 700px at 50% 120%, rgba(4,251,108,.06), transparent 60%);
  background-attachment:fixed; min-height:100vh;
}
a{color:var(--neon);text-decoration:none}
a:hover{text-decoration:none;filter:brightness(1.1)}
h1,h2,h3,.display{font-family:var(--display);font-weight:800;letter-spacing:-.4px;margin:0 0 .4em;line-height:1.2}
code,kbd,.mono{font-family:var(--mono)}
.container{max-width:1120px;margin:0 auto;padding:0 22px;position:relative;z-index:2}
.neon{color:var(--neon)}.muted{color:var(--muted)}.dim{color:var(--dim)}
.glow{text-shadow:0 0 26px var(--neon-glow)}

/* ---------- animated aurora (drifts behind content, shows between sections) ---------- */
.aurora{position:fixed;inset:-25%;z-index:0;pointer-events:none;overflow:hidden;
  filter:blur(90px) saturate(1.1);opacity:.55}
.aurora span{position:absolute;display:block;border-radius:50%;mix-blend-mode:screen;will-change:transform}
.aurora span:nth-child(1){width:48vw;height:48vw;inset-block-start:-6%;inset-inline-end:-4%;
  background:radial-gradient(circle at 50% 50%, rgba(4,251,108,.55), transparent 70%);
  animation:aurora1 26s ease-in-out infinite}
.aurora span:nth-child(2){width:40vw;height:40vw;inset-block-end:-8%;inset-inline-start:-6%;
  background:radial-gradient(circle at 50% 50%, rgba(4,251,108,.38), transparent 70%);
  animation:aurora2 32s ease-in-out infinite}
.aurora span:nth-child(3){width:34vw;height:34vw;inset-block-start:38%;inset-inline-start:30%;
  background:radial-gradient(circle at 50% 50%, rgba(10,255,150,.3), transparent 72%);
  animation:aurora3 38s ease-in-out infinite}
.aurora span:nth-child(4){width:30vw;height:30vw;inset-block-start:58%;inset-inline-end:8%;
  background:radial-gradient(circle at 50% 50%, rgba(4,251,108,.28), transparent 72%);
  animation:aurora4 29s ease-in-out infinite}
@keyframes aurora1{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(-6vw,7vh,0) scale(1.18)}}
@keyframes aurora2{0%,100%{transform:translate3d(0,0,0) scale(1.05)}50%{transform:translate3d(8vw,-6vh,0) scale(.85)}}
@keyframes aurora3{0%,100%{transform:translate3d(0,0,0) scale(.9)}50%{transform:translate3d(5vw,8vh,0) scale(1.2)}}
@keyframes aurora4{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(-7vw,-5vh,0) scale(1.1)}}
@media (prefers-reduced-motion:reduce){.aurora span{animation:none!important}}

/* scanline veil */
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:1;
  background:repeating-linear-gradient(0deg,rgba(4,251,108,.022) 0 1px,transparent 1px 3px);opacity:.6}

/* ---------- buttons (pills) ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;cursor:pointer;font-family:var(--display);
  font-weight:600;font-size:14px;border-radius:var(--pill);padding:11px 22px;transition:.16s;
  border:1px solid var(--line);background:transparent;color:var(--fg)}
.btn:hover{border-color:var(--line-strong);transform:translateY(-1px)}
.btn.primary{background:var(--neon);color:var(--neon-ink);border-color:var(--neon);font-weight:700}
.btn.primary:hover{box-shadow:0 8px 30px var(--neon-glow);filter:brightness(1.04)}
.btn.ghost{background:transparent;color:var(--muted)}
.btn.ghost:hover{color:var(--fg)}
.btn.sm{padding:7px 14px;font-size:13px}
.btn.danger{color:#ffb3c2;border-color:rgba(255,92,122,.3)}
.btn.danger:hover{border-color:#ff5c7a;box-shadow:0 0 0 1px rgba(255,92,122,.3)}

/* ---------- pills / badges ---------- */
.pill,.state-pill,.chip,.env,.tag,.badge{display:inline-flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:12px;border-radius:var(--pill);padding:5px 13px;
  border:1px solid var(--line);color:var(--muted);background:var(--neon-dim);letter-spacing:.3px}
.chip{background:transparent}
.badge{font-weight:600}
.badge.beginner{color:var(--t-beginner);border-color:rgba(4,251,108,.3)}
.badge.intermediate{color:var(--t-intermediate);border-color:rgba(255,194,71,.3);background:rgba(255,194,71,.06)}
.badge.advanced{color:var(--t-advanced);border-color:rgba(255,159,69,.3);background:rgba(255,159,69,.06)}
.badge.expert{color:var(--t-expert);border-color:rgba(255,92,122,.3);background:rgba(255,92,122,.06)}
.env-live{color:var(--neon);border-color:rgba(4,251,108,.3)}
.env-soon{color:var(--dim);background:transparent}
.tag.admin{color:var(--neon);border-color:rgba(4,251,108,.3)}
.tag.banned{color:var(--t-expert);border-color:rgba(255,92,122,.3)}

/* ---------- top nav ---------- */
.nav{position:sticky;top:0;z-index:40;background:rgba(7,12,9,.82);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;gap:10px;min-height:64px;flex-wrap:wrap;padding-block:8px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:800;font-size:19px;color:var(--fg);letter-spacing:-.3px}
.brand .mark{width:34px;height:34px;flex:none;filter:drop-shadow(0 0 10px var(--neon-glow))}
.brand b{color:var(--neon)}
.brand .sub{display:block;font-size:10px;color:var(--muted);font-weight:500;letter-spacing:1px;margin-top:-2px}
.nav .links{display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.nav .userbox{display:flex;gap:6px;align-items:center;margin-inline-start:auto;flex-wrap:wrap}
.nav .links a{color:var(--muted);padding:6px 10px;border-radius:var(--pill);font-family:var(--display);font-weight:600;font-size:13px;white-space:nowrap;transition:.15s}
.nav .links a:hover{color:var(--fg);background:var(--neon-dim)}
.nav .links a.active{color:var(--neon);background:var(--neon-dim);box-shadow:inset 0 0 0 1px var(--line)}
.nav .me{color:var(--dim);font-size:12px;font-family:var(--mono);padding-inline:6px}

/* ---------- section headers (kicker + glow title + underline) ---------- */
.sec{margin:40px 0 18px}
.sec .kick{font-family:var(--mono);font-size:12px;letter-spacing:3px;color:var(--dim);text-transform:uppercase}
.sec h2{font-size:30px;margin:6px 0 10px}
.sec h2 .lit{color:var(--neon);text-shadow:0 0 28px var(--neon-glow)}
.sec .rule{width:56px;height:3px;border-radius:3px;background:var(--neon);box-shadow:0 0 14px var(--neon-glow)}

/* ---------- hero / mission ---------- */
.hero{padding:30px 0 10px}
.state-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--muted)}
.state-open{color:var(--neon);border-color:rgba(4,251,108,.3)}.state-open .dot{background:var(--neon);box-shadow:0 0 10px var(--neon)}
.state-paused{color:var(--t-intermediate);border-color:rgba(255,194,71,.3)}.state-paused .dot{background:var(--t-intermediate)}
.state-ended,.state-not_started{color:var(--t-expert);border-color:rgba(255,92,122,.3)}.state-ended .dot,.state-not_started .dot{background:var(--t-expert)}

.mission{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px 32px;margin:14px 0 8px;
  background:
    radial-gradient(600px 240px at 85% -40%, rgba(4,251,108,.12), transparent 60%),
    linear-gradient(180deg,var(--panel-a),var(--panel-b));
  box-shadow:0 25px 50px -20px rgba(0,0,0,.55)}
.mission .tag{margin-bottom:12px}
.mission h1,.mission h2{font-size:34px;margin:4px 0 10px}
.mission .lead{color:var(--muted);font-size:15px;max-width:66ch;margin:0}
.mission .prompt{font-family:var(--mono);color:var(--neon);font-size:14px;margin:6px 0 0}
.cursor{display:inline-block;width:8px;height:15px;background:var(--neon);margin-inline-start:3px;
  vertical-align:-2px;animation:blink 1.1s steps(1) infinite;box-shadow:0 0 8px var(--neon)}
@keyframes blink{50%{opacity:0}}
.rootbar{margin-top:18px}
.rootbar .lbl{display:flex;justify-content:space-between;font-family:var(--mono);font-size:12px;color:var(--muted);margin-bottom:7px}
.rootbar .track{height:9px;background:#071009;border:1px solid var(--line);border-radius:var(--pill);overflow:hidden}
.rootbar .fill{height:100%;background:linear-gradient(90deg,#04fb6c,#9fef00);box-shadow:0 0 16px var(--neon-glow);border-radius:var(--pill);transition:width .6s}

/* ---------- stats strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:22px 0 10px;
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:linear-gradient(180deg,var(--panel-a),var(--panel-b))}
.stat{padding:22px 18px;text-align:center;border-inline-start:1px solid var(--line)}
.stat:first-child{border-inline-start:none}
.stat .v{font-family:var(--display);font-weight:800;font-size:30px;color:var(--neon);text-shadow:0 0 22px var(--neon-glow);line-height:1}
.stat .k{color:var(--muted);font-size:13px;margin-top:8px}

/* ---------- category sections + challenge cards ---------- */
.cat-head{display:flex;align-items:center;gap:12px;margin:34px 0 14px;padding-top:22px;border-top:1px solid var(--line-soft)}
.cat-head .cat-code{font-family:var(--mono);font-size:12px;color:var(--neon);border:1px solid rgba(4,251,108,.3);
  border-radius:8px;padding:3px 10px;background:var(--neon-dim)}
.cat-head h2{font-size:21px;margin:0}
.cat-head .count{color:var(--dim);font-family:var(--mono);font-size:13px;margin-inline-start:auto}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:15px}
.card{position:relative;display:block;padding:18px 19px;border-radius:var(--r);color:var(--fg);
  border:1px solid var(--line);transition:.17s;overflow:hidden;
  background:linear-gradient(180deg,var(--panel-a),var(--panel-b));
  box-shadow:0 18px 40px -24px rgba(0,0,0,.6)}
.card::after{content:"";position:absolute;inset-inline-start:0;inset-block-start:0;height:3px;width:100%;
  background:linear-gradient(90deg,transparent,currentColor,transparent);opacity:.35;color:var(--neon)}
.card.beginner{color:var(--t-beginner)}.card.intermediate{color:var(--t-intermediate)}
.card.advanced{color:var(--t-advanced)}.card.expert{color:var(--t-expert)}
.card .title,.card .meta,.card .slug{color:var(--fg)}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px);
  box-shadow:0 22px 48px -18px rgba(0,0,0,.65),0 0 0 1px var(--line)}
.card .title{font-family:var(--display);font-weight:700;font-size:18px;margin:4px 0 0}
.card .cimg{width:100%;height:120px;object-fit:cover;border-radius:10px;border:1px solid var(--line);margin:4px 0 8px;display:block}
.card .meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.card .pts{font-family:var(--mono);color:var(--neon);font-weight:700;margin-inline-start:auto}
.card.solved{border-color:rgba(4,251,108,.3)}
.card .solvedmark{position:absolute;inset-block-start:14px;inset-inline-end:16px;color:var(--neon);
  font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.5px}

/* ---------- auth ---------- */
.auth-wrap{min-height:calc(100vh - 68px);display:flex;align-items:center;justify-content:center;padding:34px}
.auth{width:100%;max-width:420px;border:1px solid var(--line);border-radius:var(--r-lg);padding:34px 30px;
  background:
    radial-gradient(400px 180px at 50% -30%, rgba(4,251,108,.1), transparent 60%),
    linear-gradient(180deg,var(--panel-a),var(--panel-b));
  box-shadow:0 30px 70px -20px rgba(0,0,0,.6)}
.auth .kick{text-align:center;font-family:var(--mono);color:var(--neon);font-size:12px;letter-spacing:4px}
.auth h1{font-size:28px;text-align:center;margin:8px 0 2px}
.auth .tagline{color:var(--muted);text-align:center;font-size:14px;margin:0 0 22px}
label{display:block;color:var(--muted);font-size:13px;margin:14px 0 6px;font-weight:600}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=datetime-local],select,textarea{
  width:100%;background:var(--bg-2);border:1px solid var(--line);border-radius:12px;color:var(--fg);
  padding:12px 14px;font-family:var(--sans);font-size:15px;transition:.15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--neon);box-shadow:0 0 0 3px var(--neon-dim2)}
.mono-in{font-family:var(--mono)}
.auth .btn{width:100%;justify-content:center;margin-top:20px;font-size:15px;padding:13px}
.auth .swap{text-align:center;margin-top:18px;color:var(--muted);font-size:14px}
.msg{border-radius:12px;padding:11px 14px;font-size:14px;margin:6px 0}
.msg.bad{background:rgba(255,92,122,.1);border:1px solid rgba(255,92,122,.4);color:#ffb3c2}
.msg.ok{background:var(--neon-dim2);border:1px solid rgba(4,251,108,.4);color:var(--neon)}
.msg.dup{background:rgba(255,194,71,.1);border:1px solid rgba(255,194,71,.4);color:#ffd98a}

/* ---------- event cover (غلاف) ---------- */
/* free (uncropped) cover — shows the whole image at its natural aspect ratio */
.event-cover{margin:16px auto 4px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:0 20px 50px -22px rgba(0,0,0,.65);max-width:680px}
.event-cover img{display:block;width:100%;height:auto}
/* cover on the events-list card */
.card.has-cover{padding-top:0;overflow:hidden}
.card .card-cover{margin:-1px -19px 12px;height:120px;overflow:hidden}
.card .card-cover img{width:100%;height:100%;object-fit:cover;display:block}
/* admin: wide preview box for the cover */
.logo-preview.cover{width:200px;height:72px}

/* ---------- challenge image banner (large) ---------- */
.chal-banner{display:block;margin:14px 0 4px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);box-shadow:0 18px 44px -20px rgba(0,0,0,.6)}
.chal-banner img{display:block;width:100%;height:340px;object-fit:cover;background:var(--bg-2)}
@media (max-width:760px){.chal-banner img{height:220px}}
.chal-banner:hover{border-color:var(--line-strong)}

/* ---------- challenge detail ---------- */
.detail{display:grid;grid-template-columns:1fr;gap:16px;margin-top:10px}
.panel{border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;
  background:linear-gradient(180deg,var(--panel-a),var(--panel-b));box-shadow:0 18px 40px -24px rgba(0,0,0,.5)}
.panel h3{font-size:16px;color:var(--fg);margin-bottom:14px;font-weight:700}
.desc{font-size:16px;line-height:1.9}
.flex{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.submit-row{display:flex;gap:10px}
.submit-row input{flex:1;font-family:var(--mono)}
.dl{display:inline-flex;align-items:center;gap:9px;background:var(--bg-2);border:1px solid var(--line);
  border-radius:12px;padding:12px 18px;font-family:var(--mono);color:var(--fg);transition:.15s}
.dl:hover{border-color:var(--line-strong);transform:translateY(-1px)}
.dl .ic{color:var(--neon)}
.back{color:var(--dim);font-family:var(--mono);font-size:13px}
.back:hover{color:var(--neon)}
.hintbox{border:1px solid var(--line);border-radius:12px;margin-top:10px;overflow:hidden;background:var(--bg-2)}
.hint-head{display:flex;align-items:center;justify-content:space-between;padding:12px 15px}
.hint-body{padding:0 16px 14px;color:var(--fg);font-size:15px;line-height:1.9}
.lvl{font-family:var(--mono);font-size:12px}

/* ---------- scoreboard ---------- */
table{width:100%;border-collapse:collapse}
.board{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:linear-gradient(180deg,var(--panel-a),var(--panel-b))}
.board th,.board td{padding:14px 16px;text-align:start}
.board thead th{color:var(--muted);font-size:13px;font-weight:600;border-bottom:1px solid var(--line);background:rgba(4,251,108,.04)}
.board tbody tr{border-bottom:1px solid var(--line-soft)}
.board tbody tr:last-child{border-bottom:none}
.board tbody tr:hover{background:var(--neon-dim)}
.board tr.me{background:var(--neon-dim2);box-shadow:inset 0 0 0 1px rgba(4,251,108,.3)}
.board .rank{font-family:var(--display);font-weight:800;font-size:18px;color:var(--muted);width:64px}
.board .r1{color:#ffd700;text-shadow:0 0 16px rgba(255,215,0,.5)}.board .r2{color:#cfd8dc}.board .r3{color:#cd7f32}
.board .score{font-family:var(--mono);color:var(--neon);font-weight:700}
.board .name{font-weight:700}

/* ---------- terminal ---------- */
.term-frame{width:100%;height:72vh;border:1px solid var(--line);border-radius:var(--r);background:#000;overflow:hidden}
.term-frame iframe{width:100%;height:100%;border:0;display:block}

/* ---------- admin ---------- */
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.adm-ch{border:1px solid var(--line);border-radius:12px;margin:10px 0;overflow:hidden;background:var(--panel-b)}
.adm-ch summary{cursor:pointer;padding:14px 16px;display:flex;align-items:center;gap:12px;list-style:none}
.adm-ch summary::-webkit-details-marker{display:none}
.adm-ch summary:hover{background:var(--neon-dim)}
.adm-ch .edit{padding:18px;border-top:1px solid var(--line)}
.adm-ch .edit textarea{min-height:60px;resize:vertical}
.spacer{flex:1}.sec-title{display:flex;align-items:center;gap:10px;margin:28px 0 12px;font-family:var(--display);font-weight:800;font-size:19px;
  padding-bottom:10px;border-bottom:1px solid var(--line)}
/* labeled sub-section inside a form */
.form-sec{font-family:var(--display);font-weight:700;font-size:15px;color:var(--neon);margin:20px 0 10px;
  padding-inline-start:10px;border-inline-start:3px solid var(--neon)}
.form-sec:first-child{margin-top:4px}
/* competition logo upload area */
.logo-row{display:flex;gap:16px;align-items:flex-start;flex-wrap:wrap}
.logo-preview{width:88px;height:88px;border-radius:12px;border:1px dashed var(--line);background:var(--bg-2);
  display:flex;align-items:center;justify-content:center;overflow:hidden;flex:none;font-size:12px}
.logo-preview img{width:100%;height:100%;object-fit:cover}
input[type=file]{padding:9px;cursor:pointer}
input[type=file]::file-selector-button{background:var(--neon-dim);color:var(--neon);border:1px solid var(--line);
  border-radius:8px;padding:7px 12px;margin-inline-end:10px;cursor:pointer;font-family:var(--sans)}
.utbl td,.utbl th{font-size:14px}
hr{border:none;border-top:1px solid var(--line);margin:18px 0}

/* ---------- avatars ---------- */
.avatar{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;
  background:var(--neon-dim2);border:1px solid rgba(4,251,108,.3);color:var(--neon);font-family:var(--display);
  font-weight:700;font-size:12px;flex:none}
.avatar.lg{width:64px;height:64px;font-size:26px;box-shadow:0 0 24px var(--neon-glow)}
.profile-chip{display:inline-flex;align-items:center;gap:8px;padding:5px 12px 5px 6px;border-radius:var(--pill);
  border:1px solid var(--line);color:var(--fg)!important;font-family:var(--display);font-weight:600;font-size:13px}
.profile-chip:hover,.profile-chip.active{background:var(--neon-dim);border-color:var(--line-strong)}

/* ---------- profile ---------- */
.profile-head{display:flex;align-items:center;gap:18px;margin-top:18px}

/* ---------- podium ---------- */
.podium{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;align-items:end;margin-bottom:22px}
.pod{display:flex;flex-direction:column;align-items:center;gap:6px;padding:22px 16px;border-radius:var(--r);
  border:1px solid var(--line);background:linear-gradient(180deg,var(--panel-a),var(--panel-b));color:var(--fg);
  text-align:center;transition:.16s}
.pod:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.pod .medal{font-size:26px}
.pod .pname{font-family:var(--display);font-weight:700;font-size:16px}
.pod .pscore{font-family:var(--mono);color:var(--neon);font-weight:700}
.pod-1{order:2;padding-block:30px;border-color:rgba(255,215,0,.35);box-shadow:0 0 40px -10px rgba(255,215,0,.25)}
.pod-1 .avatar{box-shadow:0 0 26px rgba(255,215,0,.4);border-color:rgba(255,215,0,.5);color:#ffd700}
.pod-2{order:1}.pod-3{order:3}

/* ---------- activity feed ---------- */
.activity{display:flex;flex-direction:column;gap:2px}
.act{display:flex;align-items:center;gap:10px;padding:11px 14px;border:1px solid var(--line-soft);
  border-radius:12px;background:var(--panel-b);font-size:14px}
.act .name{font-weight:700}

/* ---------- filter bar ---------- */
.filterbar{display:flex;gap:10px;flex-wrap:wrap;margin:8px 0 6px}
.filterbar #q{flex:1;min-width:200px}
.filterbar select{max-width:170px}

/* ---------- countdown banner ---------- */
.countdown{display:flex;align-items:center;gap:12px;padding:14px 18px;border-radius:var(--r);margin:16px 0 2px;
  border:1px solid var(--line);background:linear-gradient(180deg,var(--panel-a),var(--panel-b))}
.countdown .cd-ic{font-size:20px}
.countdown .cd-lbl{color:var(--muted);font-weight:600}
.countdown .cd-time{margin-inline-start:auto;font-size:22px;font-weight:700;color:var(--neon);
  text-shadow:0 0 18px var(--neon-glow);letter-spacing:1px}
.countdown.not_started{border-color:rgba(255,194,71,.35)}
.countdown.not_started .cd-time{color:var(--t-intermediate);text-shadow:0 0 16px rgba(255,194,71,.4)}
.countdown.ended{border-color:rgba(255,92,122,.35)}
.countdown.ended .cd-lbl{color:var(--t-expert)}

/* ---------- announcement banner ---------- */
.announce{display:flex;align-items:center;gap:10px;padding:13px 16px;border-radius:var(--r);margin:16px 0 2px;
  border:1px solid rgba(4,251,108,.3);background:var(--neon-dim);color:var(--fg)}
.announce:hover{background:var(--neon-dim2)}
.announce .ic{font-size:18px}

/* ---------- solvers ---------- */
.solver{display:inline-flex;align-items:center;gap:7px;padding:5px 12px 5px 6px;border-radius:var(--pill);
  border:1px solid var(--line);color:var(--fg);font-size:13px;font-weight:600}
.solver:hover{border-color:var(--line-strong);background:var(--neon-dim)}

footer{padding:36px 22px;color:var(--dim);font-size:13px;text-align:center}

@media (max-width:760px){
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3){border-inline-start:none}
  .row2{grid-template-columns:1fr}
  .mission h1,.mission h2{font-size:26px}
  .sec h2{font-size:24px}
  .nav .container{height:auto;padding-block:10px;flex-wrap:wrap;gap:8px}
}

/* live scoreboard indicator */
.live-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--neon);vertical-align:middle;margin-inline-start:10px;box-shadow:0 0 0 0 var(--neon-glow)}
.live-dot.pulse{animation:livePulse 1.2s ease-out}
@keyframes livePulse{0%{box-shadow:0 0 0 0 var(--neon-glow)}70%{box-shadow:0 0 0 9px transparent}100%{box-shadow:0 0 0 0 transparent}}

/* ===== correct-flag celebration ===== */
.celebrate{position:fixed;inset:0;z-index:9999;pointer-events:none;overflow:hidden;display:flex;align-items:center;justify-content:center}
.celebrate .win-card{
  text-align:center;padding:30px 44px;border-radius:22px;
  background:rgba(10,14,11,.86);backdrop-filter:blur(10px);
  border:1px solid var(--neon);box-shadow:0 0 0 1px var(--neon-dim),0 20px 60px rgba(0,0,0,.6),0 0 60px var(--neon-glow);
  animation:winPop .5s cubic-bezier(.2,1.4,.4,1) both;
}
.win-card .win-check{
  width:92px;height:92px;margin:0 auto 14px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:48px;font-weight:800;color:#061009;
  background:var(--neon);box-shadow:0 0 34px var(--neon-glow);
  animation:winCheck .6s cubic-bezier(.2,1.5,.4,1) .08s both;
}
.win-card.fb .win-check{background:#ff2d2d;color:#fff;box-shadow:0 0 36px rgba(255,45,45,.6);font-size:44px}
.win-card .win-title{font-family:var(--display,Changa),sans-serif;font-weight:800;font-size:30px;color:var(--fg);margin-bottom:4px}
.win-card.fb .win-title{color:#ff6b6b}
.win-card .win-pts{font-family:var(--mono,monospace);font-size:19px;color:var(--neon);font-weight:700}
.win-card.fb .win-pts{color:#ffd60a}
@keyframes winPop{0%{opacity:0;transform:scale(.7) translateY(14px)}100%{opacity:1;transform:scale(1) translateY(0)}}
@keyframes winCheck{0%{transform:scale(0) rotate(-40deg)}100%{transform:scale(1) rotate(0)}}
.confetti-piece{position:fixed;top:-16px;will-change:transform,opacity;opacity:.95;animation:confFall linear forwards}
@keyframes confFall{0%{transform:translateY(-10px) rotate(0);opacity:1}100%{transform:translateY(108vh) rotate(760deg);opacity:.9}}
@media (prefers-reduced-motion: reduce){
  .celebrate .win-card{animation:none}
  .win-card .win-check{animation:none}
}

/* leaderboard promotional banner */


/* locked challenge cards */
.card.locked{position:relative;opacity:.72;cursor:not-allowed;filter:grayscale(.35)}
.card.locked:hover{transform:none;border-color:var(--line)}
.card.locked .title,.card.locked .cimg{opacity:.8}
.lockmark{position:absolute;top:10px;inset-inline-start:10px;background:rgba(0,0,0,.6);color:#ffd166;border:1px solid rgba(255,209,102,.4);border-radius:999px;padding:3px 10px;font-size:12px;font-weight:700;z-index:2}
.env.env-locked{color:#ffd166;background:rgba(255,209,102,.12);box-shadow:inset 0 0 0 1px rgba(255,209,102,.3)}

/* H.T-CTF general leaderboard banner on /events */
.htctf-banner{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:22px;padding:16px 20px;
  border-radius:var(--r-lg,14px);border:1px solid var(--line-strong,var(--line));
  background:linear-gradient(135deg,var(--neon-dim) 0%,transparent 60%);text-decoration:none;color:var(--fg);transition:.15s}
.htctf-banner:hover{border-color:var(--neon);box-shadow:0 0 24px var(--neon-glow)}
.htctf-l{display:flex;align-items:center;gap:14px}
.htctf-badge{font-family:var(--mono,monospace);font-weight:800;color:var(--neon);border:1px solid var(--neon);border-radius:8px;padding:6px 10px;letter-spacing:1px;white-space:nowrap}
.htctf-t{font-family:var(--display,sans-serif);font-weight:800;font-size:18px}
.htctf-go{font-weight:700;color:var(--neon);white-space:nowrap}

/* admin quick tabs */
.admin-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 10px}
.admin-tabs a{padding:8px 14px;border:1px solid var(--line);border-radius:var(--pill);color:var(--fg);text-decoration:none;font-family:var(--display,sans-serif);font-weight:600;font-size:14px;transition:.15s}
.admin-tabs a:hover{border-color:var(--neon);color:var(--neon);background:var(--neon-dim)}

/* leaderboard + ad side-by-side (so both show at once on a live display) */
.sb-wrap{display:flex;gap:20px;align-items:flex-start}
.sb-live{flex:1;min-width:0}
.sb-adwrap{flex:0 0 clamp(360px, 38vw, 680px);position:sticky;top:84px}
.sb-ad{display:block;width:100%;border-radius:var(--r-lg,14px);overflow:hidden;border:1px solid var(--line);box-shadow:0 6px 18px rgba(0,0,0,.3);transition:.15s}
.sb-ad[href]:hover{border-color:var(--neon);box-shadow:0 0 18px var(--neon-glow)}
.sb-ad img{display:block;width:100%;height:auto}
@media (max-width:760px){
  .sb-wrap{flex-direction:column}
  .sb-adwrap{flex:none;width:100%;position:static;order:-1;margin-bottom:6px}
  .sb-adwrap .sb-ad{max-width:560px;margin:0 auto}
  .sb-adwrap .sb-ad img{max-height:200px;width:auto;max-width:100%;margin:0 auto;object-fit:contain}
}