/* ============================================================
   DCC Open — inner pages. Same tokens and components as the homepage / dcconline.in
   ============================================================ */
:root{
  --bg:#050B1A;--bg-2:#081226;--bg-3:#0C1B38;--blue:#2E7CF6;--electric:#4DA3FF;
  --gold:#E9B949;--gold-soft:#F5D78A;--ink:#EAF2FF;--muted:#8FA3C4;
  --line:rgba(141,170,220,.14);--ok:#5FD39A;--bad:#FF8E7E;--wrap:1180px;color-scheme:dark;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  background:
    radial-gradient(900px 520px at 85% -5%,rgba(46,124,246,.16),transparent 62%),
    radial-gradient(700px 480px at 0% 30%,rgba(233,185,73,.06),transparent 60%),
    var(--bg);
  background-attachment:fixed;color:var(--ink);
  font-family:'Manrope',system-ui,-apple-system,'Segoe UI',sans-serif;
  line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased;min-height:100vh;
}
::selection{background:var(--gold);color:#1a1200}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
img,svg{max-width:100%}
h1,h2,h3{font-family:'Unbounded','Manrope',system-ui,sans-serif;line-height:1.2;text-wrap:balance}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}
[hidden]{display:none!important}
.wrap{width:min(100% - 2.5rem,var(--wrap));margin-inline:auto}
.eyebrow{display:inline-flex;align-items:center;gap:.75rem;font-size:.72rem;font-weight:800;letter-spacing:.24em;text-transform:uppercase;color:var(--gold)}
.eyebrow::before{content:'';width:30px;height:1px;background:linear-gradient(90deg,transparent,var(--gold))}
.lead{color:var(--muted);max-width:62ch;margin-top:.8rem;font-size:1rem}
.grad-text{background:linear-gradient(100deg,var(--electric) 10%,var(--gold) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;font-family:'Manrope',system-ui,sans-serif;font-weight:800;font-size:.92rem;letter-spacing:.02em;padding:.9rem 1.8rem;border-radius:999px;border:0;transition:transform .25s,box-shadow .25s,background .25s}
.btn:hover{transform:translateY(-2px)}
.btn.sm{padding:.6rem 1.15rem;font-size:.82rem}
.btn-gold{background:linear-gradient(135deg,var(--gold),#C99B2F);color:#1c1300;box-shadow:0 8px 28px rgba(233,185,73,.3),inset 0 1px 0 rgba(255,255,255,.45)}
.btn-gold:hover{box-shadow:0 12px 38px rgba(233,185,73,.5),inset 0 1px 0 rgba(255,255,255,.45)}
.btn-ghost{background:rgba(46,124,246,.08);color:var(--electric);border:1px solid rgba(77,163,255,.4)}
.btn-ghost:hover{background:rgba(46,124,246,.18)}
.btn[disabled]{opacity:.45;pointer-events:none}

/* glass */
.glass{background:linear-gradient(160deg,rgba(20,36,70,.55),rgba(10,20,40,.45));border:1px solid var(--line);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-radius:22px}

/* nav */
#nav{position:fixed;top:0;left:0;right:0;z-index:50;padding-top:env(safe-area-inset-top,0px);background:rgba(5,11,26,.78);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:.85rem}
.brand{display:flex;align-items:center;gap:.8rem;min-width:0}
.logo-chip{display:block;flex:none;width:136px;height:44px;border-radius:12px;background:#fff url("logo.png") center/118px auto no-repeat;box-shadow:0 6px 22px rgba(2,6,18,.55),0 0 0 1px rgba(233,185,73,.35)}
.brand-tag{display:flex;flex-direction:column;line-height:1.15}
.brand-tag b{font-family:'Unbounded',sans-serif;font-size:.86rem;font-weight:700;letter-spacing:.06em;color:var(--gold-soft)}
.brand-tag small{font-size:.58rem;color:var(--muted);letter-spacing:.2em;text-transform:uppercase;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:1.5rem}
.nav-link{position:relative;color:var(--muted);font-size:.84rem;font-weight:600;letter-spacing:.04em;transition:color .25s;white-space:nowrap}
.nav-link::after{content:'';position:absolute;left:0;bottom:-6px;height:2px;width:0;background:linear-gradient(90deg,var(--blue),var(--gold));transition:width .3s}
.nav-link:hover,.nav-link.on{color:var(--ink)}
.nav-link:hover::after,.nav-link.on::after{width:100%}
.nav-ext{color:var(--gold-soft)}
.menu-btn{display:none;width:44px;height:44px;border-radius:13px;border:1px solid var(--line);background:rgba(8,18,38,.7);align-items:center;justify-content:center;flex:none}
.menu-btn svg{width:20px;height:20px}
@media (max-width:1120px){
  .nav-links{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:rgba(5,11,26,.98);border-bottom:1px solid var(--line);padding:.4rem 1.25rem 1.1rem;display:none}
  #nav.open .nav-links{display:flex}
  .nav-link{padding:.85rem .2rem;font-size:.95rem;border-bottom:1px solid var(--line)}
  .nav-link::after{display:none}
  .nav-link.on{color:var(--gold-soft)}
  .menu-btn{display:inline-flex}
}
@media (max-width:620px){.brand-tag small{display:none}.logo-chip{width:122px;height:40px;background-size:106px auto}}

/* page */
.page{padding:calc(6.6rem + env(safe-area-inset-top,0px)) 0 4.5rem;min-height:72vh}
.page-head h1{font-size:clamp(1.6rem,4vw,2.7rem);font-weight:800;letter-spacing:-.01em;margin-top:.9rem}
.chips{display:flex;flex-wrap:wrap;gap:.55rem}
.class-chips{margin-top:1.7rem}
.chip{display:inline-flex;align-items:center;gap:.4rem;font-size:.84rem;font-weight:700;padding:.5rem 1rem;border-radius:999px;border:1px solid var(--line);background:rgba(8,18,38,.6);color:var(--ink);transition:border-color .25s,color .25s,transform .25s}
a.chip:hover{border-color:rgba(233,185,73,.55);color:var(--gold-soft);transform:translateY(-2px)}
.chip.on{color:#1c1300;border-color:transparent;background:linear-gradient(135deg,var(--gold),#C99B2F);box-shadow:0 6px 20px rgba(233,185,73,.3)}
a.chip.on:hover{color:#1c1300}
.chip.sm{font-size:.74rem;padding:.24rem .7rem;font-weight:600;color:var(--muted)}
@media (max-width:620px){
  .class-chips{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin-inline:-1.25rem;padding:.2rem 1.25rem}
  .class-chips::-webkit-scrollbar{display:none}
  .class-chips .chip{white-space:nowrap;flex:none}
}

/* filters */
.filters{margin-top:1.1rem;padding:1rem 1.1rem;display:flex;flex-wrap:wrap;gap:.8rem;align-items:flex-end}
.filters label{display:flex;flex-direction:column;gap:.35rem;min-width:150px}
.filters label.grow{flex:1 1 220px}
.filters label span{font-size:.66rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-left:.2rem}
.input{width:100%;background:rgba(8,18,38,.6);border:1px solid var(--line);border-radius:14px;color:var(--ink);font-family:'Manrope',system-ui,sans-serif;font-size:.92rem;padding:.72rem 1rem;outline:none;transition:border-color .3s,box-shadow .3s}
.input::placeholder{color:rgba(143,163,196,.55)}
.input:focus{border-color:var(--electric);box-shadow:0 0 0 4px rgba(46,124,246,.14)}
select.input{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238FA3C4' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .9rem center;background-size:16px;padding-right:2.6rem}
select.input option{background:#081226;color:var(--ink)}
.filters .btn{padding:.72rem 1.5rem}
@media (max-width:620px){.filters label{flex:1 1 calc(50% - .4rem);min-width:0}.filters label.grow{flex-basis:100%}.filters .btn{width:100%}}
.count{margin:1.2rem .2rem .9rem;color:var(--muted);font-size:.88rem}
.count a{color:var(--electric);font-weight:700}

/* resource cards */
.res-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1rem}
.res-card{padding:1.25rem;display:flex;flex-direction:column;gap:.75rem;transition:border-color .3s,transform .3s}
.res-card:hover{border-color:rgba(233,185,73,.4);transform:translateY(-3px)}
.res-top{display:flex;gap:.9rem;align-items:flex-start}
.res-top>div{min-width:0}
.res-card h2{font-family:'Manrope',sans-serif;font-size:1.02rem;font-weight:800;line-height:1.35;overflow-wrap:anywhere}
.meta{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.5rem}
.chapter,.desc{color:var(--muted);font-size:.9rem}
.chapter b{color:var(--ink);font-weight:700}
.res-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.55rem;margin-top:auto;padding-top:.3rem}
.res-actions.center{justify-content:center}
.fsize{margin-left:auto;color:var(--muted);font-size:.76rem;font-weight:700;letter-spacing:.04em}
.ico{flex:none;width:46px;height:46px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;color:var(--gold-soft);border:1px solid rgba(233,185,73,.28);background:rgba(233,185,73,.07)}
.ico svg{width:22px;height:22px}
@media (max-width:420px){.res-grid{grid-template-columns:1fr}}
.empty{padding:clamp(2rem,6vw,3.5rem) 1.5rem;text-align:center;display:flex;flex-direction:column;align-items:center;gap:.9rem}
.empty h2{font-size:1.15rem;font-weight:700}
.empty p{color:var(--muted);max-width:46ch}

/* practice player */
.back{display:inline-block;color:var(--muted);font-size:.86rem;font-weight:700;margin-bottom:1rem}
.back:hover{color:var(--gold-soft)}
.p-start{padding:clamp(1.4rem,4vw,2.6rem);max-width:760px}
.p-start h1{font-size:clamp(1.3rem,3.2vw,2rem);font-weight:700;margin-top:.8rem}
.p-facts{display:flex;flex-wrap:wrap;gap:.8rem;margin:1.4rem 0}
.p-facts div{flex:1 1 130px;border:1px solid var(--line);border-radius:16px;padding:.8rem 1rem;background:rgba(8,18,38,.55)}
.p-facts b{display:block;font-family:'Unbounded',sans-serif;font-size:1.15rem;color:var(--gold-soft)}
.p-facts span{color:var(--muted);font-size:.8rem}
.p-rules{color:var(--muted);font-size:.92rem;margin:0 0 1.5rem 1.1rem;display:grid;gap:.35rem}
.p-bar{display:flex;align-items:center;gap:1rem;padding:.7rem 1rem;position:sticky;top:calc(4.6rem + env(safe-area-inset-top,0px));z-index:20;background:rgba(9,17,34,.96)}
.p-title{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.92rem}
.p-timer{font-family:'Unbounded',sans-serif;font-weight:700;font-size:1rem;color:var(--gold-soft);font-variant-numeric:tabular-nums}
.p-timer.low{color:var(--bad)}
.p-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:1rem;margin-top:1rem;align-items:start}
.p-q{padding:clamp(1.1rem,3vw,1.8rem)}
.p-qno{font-size:.72rem;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.p-qtext{font-size:1.05rem;font-weight:600;margin-top:.7rem;white-space:pre-line;overflow-wrap:anywhere}
.p-opts{display:grid;gap:.6rem;margin-top:1.2rem}
.p-opt{display:flex;gap:.8rem;align-items:flex-start;text-align:left;width:100%;padding:.8rem .95rem;border-radius:16px;border:1px solid var(--line);background:rgba(8,18,38,.55);font-size:.96rem;transition:border-color .2s,background .2s;white-space:pre-line;overflow-wrap:anywhere}
.p-opt:hover{border-color:rgba(77,163,255,.5)}
.p-opt i{flex:none;font-style:normal;font-weight:800;font-size:.8rem;width:1.75rem;height:1.75rem;border-radius:50%;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;color:var(--muted)}
.p-opt[aria-checked="true"]{border-color:var(--gold);background:rgba(233,185,73,.1)}
.p-opt[aria-checked="true"] i{background:var(--gold);border-color:var(--gold);color:#1c1300}
.p-nav{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.4rem}
.p-nav .btn-gold{margin-left:auto}
.p-side{padding:1rem;position:sticky;top:calc(8.6rem + env(safe-area-inset-top,0px))}
.p-side-head{font-size:.68rem;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-bottom:.7rem}
.p-pal{display:grid;grid-template-columns:repeat(auto-fill,minmax(40px,1fr));gap:.4rem;max-height:46vh;overflow-y:auto}
.p-pal button{height:40px;border-radius:11px;border:1px solid var(--line);background:rgba(8,18,38,.6);font-weight:800;font-size:.82rem;color:var(--muted)}
.p-pal button.s{border-color:rgba(255,142,126,.6);color:var(--bad)}
.p-pal button.a{background:rgba(95,211,154,.16);border-color:rgba(95,211,154,.6);color:var(--ok)}
.p-pal button.m{background:rgba(160,120,255,.18);border-color:rgba(170,140,255,.7);color:#C9B8FF}
.p-pal button.cur{outline:2px solid var(--gold);outline-offset:1px}
.p-legend{display:grid;grid-template-columns:1fr 1fr;gap:.35rem .6rem;margin-top:.9rem;font-size:.72rem;color:var(--muted)}
.lg{display:inline-block;width:12px;height:12px;border-radius:4px;margin-right:.4rem;vertical-align:-1px;border:1px solid var(--line)}
.lg.a{background:rgba(95,211,154,.4);border-color:var(--ok)}.lg.m{background:rgba(160,120,255,.4);border-color:#C9B8FF}.lg.s{border-color:var(--bad)}
@media (max-width:860px){
  .p-grid{grid-template-columns:1fr}
  .p-side{position:static}
  .p-pal{max-height:none}
  .p-nav .btn{flex:1 1 calc(50% - .3rem)}
  .p-nav .btn-gold{margin-left:0}
}
.p-score{padding:clamp(1.5rem,5vw,3rem);text-align:center}
.p-big{font-family:'Unbounded',sans-serif;font-weight:800;font-size:clamp(2.2rem,8vw,4rem);margin-top:.6rem}
.p-big small{font-size:.4em;color:var(--muted);font-weight:600}
.p-score .p-facts{justify-content:center;max-width:640px;margin-inline:auto}
.p-rev-head{font-size:1.1rem;font-weight:700;margin:2rem 0 1rem}
.rev{padding:1.1rem 1.2rem;margin-bottom:.8rem}
.rev .p-qtext{font-size:.98rem;margin-top:.4rem}
.rev-opt{display:flex;gap:.6rem;padding:.45rem .7rem;border-radius:12px;margin-top:.4rem;font-size:.92rem;color:var(--muted);border:1px solid transparent;white-space:pre-line;overflow-wrap:anywhere}
.rev-opt.right{border-color:rgba(95,211,154,.6);background:rgba(95,211,154,.1);color:var(--ink)}
.rev-opt.wrong{border-color:rgba(255,142,126,.6);background:rgba(255,142,126,.08);color:var(--ink)}
.rev-tag{font-size:.7rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
.rev-tag.ok{color:var(--ok)}.rev-tag.no{color:var(--bad)}.rev-tag.sk{color:var(--muted)}
.rev-exp{margin-top:.7rem;padding:.7rem .9rem;border-left:2px solid var(--gold);background:rgba(233,185,73,.05);border-radius:0 12px 12px 0;font-size:.9rem;color:var(--muted);white-space:pre-line}
.rev-exp b{color:var(--ink)}

/* footer */
footer{border-top:1px solid var(--line);background:linear-gradient(180deg,transparent,#02050D);padding-block:3rem calc(2rem + env(safe-area-inset-bottom,0px))}
.foot{display:grid;grid-template-columns:minmax(0,1.6fr) repeat(2,minmax(0,1fr));gap:2.2rem}
.foot p{color:var(--muted);font-size:.88rem;margin-top:1.1rem;max-width:38ch}
.f-head{font-family:'Unbounded',sans-serif;font-size:.7rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-soft);margin-bottom:.8rem}
.f-link{color:var(--muted);font-size:.88rem;line-height:2.15;display:block;transition:color .25s}
.f-link:hover{color:var(--gold-soft)}
.foot-bottom{margin-top:2.4rem;padding-top:1.4rem;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:.6rem 2rem;justify-content:space-between;color:var(--muted);font-size:.8rem}
@media (max-width:760px){.foot{grid-template-columns:repeat(2,minmax(0,1fr))}.foot>div:first-child{grid-column:1/-1}}

/* phone quick bar */
.qbar{display:none}
@media (max-width:620px){
  .qbar{position:fixed;left:0;right:0;bottom:0;z-index:45;display:grid;grid-template-columns:repeat(5,1fr);background:rgba(5,11,26,.97);border-top:1px solid var(--line);padding:.35rem .3rem calc(.35rem + env(safe-area-inset-bottom,0px))}
  .qbar a{display:flex;flex-direction:column;align-items:center;gap:.2rem;padding:.35rem 0;font-size:.64rem;font-weight:700;color:var(--muted)}
  .qbar a svg{width:21px;height:21px;color:var(--gold-soft)}
  .qbar a.on{color:var(--gold-soft)}
  footer{padding-bottom:calc(5.5rem + env(safe-area-inset-bottom,0px))}
}
.player-page ~ .qbar{display:none!important}
@media (max-width:620px){.player-page ~ footer{padding-bottom:calc(2rem + env(safe-area-inset-bottom,0px))}}
@media (max-width:820px),(pointer:coarse){
  .glass,#nav{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
  .glass{background:linear-gradient(160deg,rgba(18,32,62,.96),rgba(9,17,34,.97))}
  #nav{background:rgba(5,11,26,.97)}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important}}
@media print{#nav,.qbar,footer,.filters,.class-chips{display:none}body{background:#fff;color:#000}}