/* Lumira Academy — Practice section. Scoped under #practice-app / .pr-stage.
   Player buttons use pr- prefixes so site .btn styles never bleed in. */
.pr-stage{position:relative;min-height:calc(100vh - 64px);overflow:hidden;isolation:isolate;
  background:radial-gradient(120% 70% at 50% -6%,#16213c 0%,#0F172A 44%,#0B1120 100%)}
#practice-app{position:relative;z-index:2;max-width:780px;margin:0 auto;padding:34px 18px 80px}

#practice-app .pr-eyebrow{font-family:'DM Mono',ui-monospace,monospace;font-size:11px;letter-spacing:1.4px;text-transform:uppercase;color:#818CF8}
#practice-app .pr-h1{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:30px;color:#fff;margin:6px 0 0;line-height:1.1}
#practice-app .pr-sub{color:#9fb0c9;font-size:14.5px;margin-top:8px;max-width:560px}

#practice-app .pr-section{margin-top:34px}
#practice-app .pr-sec-title{display:flex;align-items:center;gap:10px;font-size:12px;letter-spacing:1.2px;text-transform:uppercase;color:#8A97AD;margin-bottom:14px}
#practice-app .pr-sec-title::after{content:"";flex:1;height:1px;background:rgba(148,163,184,.16)}
#practice-app .pr-tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media(max-width:560px){#practice-app .pr-tiles{grid-template-columns:1fr}}
#practice-app .pr-tile{position:relative;text-align:left;border:1px solid rgba(148,163,184,.18);border-radius:13px;
  background:rgba(255,255,255,.03);padding:16px 16px 15px;cursor:pointer;transition:border-color .15s,transform .1s,background .15s;color:#E7ECF6}
#practice-app .pr-tile:hover{border-color:#6366F1;background:rgba(99,102,241,.07);transform:translateY(-1px)}
#practice-app .pr-tile.locked{cursor:default;opacity:.55}
#practice-app .pr-tile.locked:hover{border-color:rgba(148,163,184,.18);background:rgba(255,255,255,.03);transform:none}
#practice-app .pr-tile-num{font-family:'DM Mono',ui-monospace,monospace;font-size:11px;color:#8A97AD;letter-spacing:.5px}
#practice-app .pr-tile-name{font-size:15.5px;font-weight:600;color:#fff;margin:3px 0 6px}
#practice-app .pr-tile-meta{font-size:12.5px;color:#9fb0c9}
#practice-app .pr-tag{position:absolute;top:14px;right:14px;font-family:'DM Mono',ui-monospace,monospace;font-size:10.5px;letter-spacing:.6px;text-transform:uppercase;padding:3px 8px;border-radius:99px}
#practice-app .pr-tag.free{background:#FEF3C7;color:#92400E}
#practice-app .pr-tag.soon{background:rgba(148,163,184,.14);color:#94A3B8}
#practice-app .pr-tag.done{background:rgba(34,197,94,.16);color:#4ADE80}

/* white paper sheet */
#practice-app .pr-sheet{background:#fff;color:#1E293B;border-radius:16px;box-shadow:0 24px 60px rgba(2,6,23,.5);overflow:hidden}
#practice-app .pr-bar{display:flex;align-items:center;gap:12px;padding:12px 24px;background:#0f172a;color:#cbd5e1;font-size:13px}
#practice-app .pr-bar .pr-prog{flex:1;height:6px;border-radius:99px;background:rgba(148,163,184,.25);overflow:hidden;min-width:0}
#practice-app .pr-bar .pr-prog>i{display:block;height:100%;width:0;background:linear-gradient(90deg,#6366F1,#818CF8);transition:width .3s}
#practice-app .pr-timer{font-family:'DM Mono',ui-monospace,monospace;font-variant-numeric:tabular-nums;color:#fff}
#practice-app .pr-timer.warn{color:#F59E0B}
#practice-app .pr-shead{padding:22px 26px;border-bottom:1px solid #E2E8F0;display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
#practice-app .pr-title{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:23px;color:#0f172a;margin:4px 0 0;line-height:1.15}
#practice-app .pr-ssub{font-size:13px;color:#475569;margin-top:6px}
#practice-app .pr-badge{flex-shrink:0;font-family:'DM Mono',ui-monospace,monospace;font-size:12px;color:#475569;border:1px solid #E2E8F0;border-radius:8px;padding:6px 10px;text-align:center;line-height:1.4}
#practice-app .pr-badge b{color:#0f172a;font-size:15px;display:block}
#practice-app .pr-sbody{padding:26px}

#practice-app .pr-modes{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:6px 0}
@media(max-width:520px){#practice-app .pr-modes{grid-template-columns:1fr}}
#practice-app .pr-mode{border:1.5px solid #E2E8F0;border-radius:12px;padding:15px 16px 17px;cursor:pointer;background:#fff;transition:border-color .15s,box-shadow .15s}
#practice-app .pr-mode:hover{border-color:#6366F1}
#practice-app .pr-mode.sel{border-color:#6366F1;box-shadow:0 0 0 3px rgba(99,102,241,.14)}
#practice-app .pr-mode h4{margin:0 0 4px;font-size:15px;color:#0f172a}
#practice-app .pr-mode p{margin:0;font-size:13px;color:#475569}
#practice-app .pr-facts{display:flex;gap:22px;margin:20px 0 4px;flex-wrap:wrap}
#practice-app .pr-fact{font-size:13px;color:#475569}
#practice-app .pr-fact b{display:block;font-family:'Fraunces',Georgia,serif;font-size:22px;color:#0f172a;font-weight:600}
#practice-app .pr-note{margin-top:16px;font-size:12.5px;color:#475569;background:#F8FAFC;border:1px solid #EEF2F7;border-radius:10px;padding:12px 14px;line-height:1.6}

#practice-app .pr-qtop{display:flex;justify-content:space-between;align-items:baseline;gap:14px;margin-bottom:6px}
#practice-app .pr-qnum{font-family:'DM Mono',ui-monospace,monospace;font-size:12px;letter-spacing:1px;text-transform:uppercase;color:#6366F1}
#practice-app .pr-qmarks{font-family:'DM Mono',ui-monospace,monospace;font-size:12.5px;color:#475569}
#practice-app .pr-stem{font-size:16.5px;color:#0f172a;line-height:1.55}
#practice-app .pr-stem code,#practice-app .mono{font-family:'DM Mono',ui-monospace,monospace;background:#F1F5F9;border:1px solid #EEF2F7;padding:1px 6px;border-radius:5px;font-size:.94em;letter-spacing:.5px}
#practice-app .pr-opts{display:flex;flex-direction:column;gap:10px;margin-top:18px}
#practice-app .pr-opt{display:flex;align-items:center;gap:12px;border:1.5px solid #E2E8F0;border-radius:10px;padding:13px 15px;cursor:pointer;font-size:15px;color:#0f172a;background:#fff;transition:border-color .12s,background .12s}
#practice-app .pr-opt:hover{border-color:#c7cdf6}
#practice-app .pr-opt.sel{border-color:#6366F1;background:#F5F6FF}
#practice-app .pr-opt .pr-key{width:24px;height:24px;flex-shrink:0;border-radius:6px;border:1.5px solid #E2E8F0;display:grid;place-items:center;font-family:'DM Mono',ui-monospace,monospace;font-size:12px;color:#475569}
#practice-app .pr-opt.sel .pr-key{border-color:#6366F1;background:#6366F1;color:#fff}
#practice-app .pr-opt.correct{border-color:#16A34A;background:#ECFDF3}
#practice-app .pr-opt.wrong{border-color:#DC2626;background:#FEF2F2}
#practice-app .pr-answer{margin-top:18px}
#practice-app .pr-answer label{display:block;font-size:12.5px;color:#475569;margin-bottom:7px}
#practice-app .pr-field{width:100%;font-family:'DM Mono',ui-monospace,monospace;font-size:16px;letter-spacing:1px;color:#0f172a;background:#fff;border:1.5px solid #E2E8F0;border-radius:10px;padding:13px 15px;outline:none}
#practice-app .pr-field:focus{border-color:#6366F1;box-shadow:0 0 0 3px rgba(99,102,241,.14)}
#practice-app textarea.pr-field{font-family:'DM Sans',sans-serif;letter-spacing:0;line-height:1.6;min-height:120px;resize:vertical}

#practice-app .pr-fb{margin-top:18px;border-radius:12px;padding:15px 16px;font-size:14px;line-height:1.6;display:none}
#practice-app .pr-fb.show{display:block}
#practice-app .pr-fb.ok{background:#ECFDF3;border:1px solid #BBF7D0}
#practice-app .pr-fb.no{background:#FEF2F2;border:1px solid #FECACA}
#practice-app .pr-fb.neutral{background:#F8FAFC;border:1px solid #E2E8F0}
#practice-app .pr-fb-head{display:flex;align-items:center;gap:8px;font-weight:600;color:#0f172a;margin-bottom:6px}
#practice-app .pr-tick{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:12px}
#practice-app .pr-fb.ok .pr-tick{background:#16A34A}#practice-app .pr-fb.no .pr-tick{background:#DC2626}
#practice-app .pr-scheme{margin:8px 0 0;padding-left:0;list-style:none}
#practice-app .pr-scheme li{display:flex;gap:8px;align-items:flex-start;font-size:13.5px;color:#1E293B;padding:3px 0}
#practice-app .pr-scheme li::before{content:"\2713";color:#16A34A;font-weight:700;flex-shrink:0}
#practice-app .pr-selfmark{margin-top:12px;padding-top:12px;border-top:1px dashed #E2E8F0}
#practice-app .pr-selfmark p{margin:0 0 8px;font-size:13px;color:#475569}
#practice-app .pr-mrow{display:flex;gap:8px;flex-wrap:wrap}
#practice-app .pr-mk{width:38px;height:38px;border-radius:9px;border:1.5px solid #E2E8F0;background:#fff;cursor:pointer;font-family:'DM Mono',ui-monospace,monospace;font-size:14px;color:#0f172a;transition:all .12s}
#practice-app .pr-mk:hover{border-color:#6366F1}
#practice-app .pr-mk.sel{border-color:#6366F1;background:#6366F1;color:#fff}

#practice-app .pr-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:24px}
#practice-app .pr-btn{border:none;cursor:pointer;font-family:'DM Sans',sans-serif;font-weight:500;font-size:15px;padding:13px 24px;border-radius:10px;transition:transform .12s,box-shadow .2s,background .15s;text-decoration:none;display:inline-flex;align-items:center;gap:8px}
#practice-app .pr-btn:disabled{opacity:.45;cursor:not-allowed}
#practice-app .pr-btn-primary{background:#6366F1;color:#fff;box-shadow:0 8px 22px rgba(99,102,241,.28)}
#practice-app .pr-btn-primary:not(:disabled):hover{transform:translateY(-1px)}
#practice-app .pr-btn-amber{background:linear-gradient(180deg,#F8CE7A,#F59E0B);color:#3a2a06;box-shadow:0 8px 22px rgba(245,158,11,.28)}
#practice-app .pr-btn-ghost{background:#fff;color:#475569;border:1.5px solid #E2E8F0}

#practice-app .pr-ring{font-family:'Fraunces',Georgia,serif;font-weight:600;font-size:56px;color:#0f172a;text-align:center;margin:6px 0 2px}
#practice-app .pr-ring span{font-size:24px;color:#8A97AD}
#practice-app .pr-rbar{max-width:420px;margin:12px auto 0;height:12px;border-radius:99px;background:#EEF2F7;overflow:hidden}
#practice-app .pr-rbar>i{display:block;height:100%;border-radius:99px;width:0;transition:width .8s cubic-bezier(.2,.7,.2,1)}
#practice-app .pr-rmsg{max-width:440px;margin:10px auto 0;text-align:center;font-size:13.5px;color:#475569}
#practice-app .pr-review{margin-top:24px;border-top:1px solid #E2E8F0;padding-top:6px}
#practice-app .pr-rev{border-bottom:1px solid #EEF2F7;padding:14px 0}
#practice-app .pr-rev-top{display:flex;align-items:center;gap:10px;cursor:pointer}
#practice-app .pr-rev-tick{width:22px;height:22px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;color:#fff;font-size:12px}
#practice-app .pr-rev-q{flex:1;min-width:0;font-size:14.5px;color:#0f172a}
#practice-app .pr-rev-m{font-family:'DM Mono',ui-monospace,monospace;font-size:12.5px;color:#475569;flex-shrink:0}
#practice-app .pr-rev-body{display:none;margin-top:10px;padding-left:32px;font-size:13.5px;color:#1E293B;line-height:1.6}
#practice-app .pr-rev.open .pr-rev-body{display:block}
#practice-app .pr-official{margin-top:22px;background:#0f172a;border-radius:14px;padding:20px 22px;color:#cbd5e1}
#practice-app .pr-official h4{margin:0 0 6px;color:#fff;font-size:16px;font-family:'Fraunces',Georgia,serif;font-weight:600}
#practice-app .pr-official p{margin:0 0 12px;font-size:13.5px;color:#9fb0c9}
#practice-app .pr-official a{display:inline-block;color:#0f172a;background:#F1BE66;font-weight:500;font-size:13.5px;padding:10px 16px;border-radius:9px;text-decoration:none}
#practice-app .pr-hidden{display:none!important}

/* subtopic + difficulty filters on the topical start screen */
#practice-app .pr-fl{margin:18px 0 0;font-size:11px;letter-spacing:.6px;text-transform:uppercase;color:#94A3B8}
#practice-app .pr-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:9px}
#practice-app .pr-chip{border:1.5px solid #E2E8F0;background:#fff;color:#334155;font-size:13px;padding:8px 13px;border-radius:99px;cursor:pointer;font-family:'DM Sans',sans-serif;transition:border-color .12s,background .12s,color .12s}
#practice-app .pr-chip:hover{border-color:#c7cdf6}
#practice-app .pr-chip.sel{border-color:#6366F1;background:#6366F1;color:#fff}
#practice-app .pr-count{margin-top:18px;font-size:13.5px;color:#475569;font-weight:500}
#practice-app .pr-count.empty{color:#B45309}
#practice-app .pr-kbd{margin-top:6px;font-size:12px;color:#94A3B8}
#practice-app .pr-kbd b{font-family:'DM Mono',monospace;background:#F1F5F9;border:1px solid #E2E8F0;border-radius:4px;padding:0 5px;color:#475569;font-weight:400}

/* board-style paper: cover, questions, ruled answer lines, marks column */
#practice-app .pr-cover{padding:36px 38px 32px}
#practice-app .pr-org{text-align:center;font-family:'Fraunces',serif;font-weight:600;font-size:15px;color:#0f172a}
#practice-app .pr-examline{text-align:center;font-size:12.5px;color:#475569;margin-top:3px}
#practice-app .pr-crule{height:2px;background:#0f172a;margin:16px 0}
#practice-app .pr-pcode{display:flex;justify-content:space-between;font-family:'DM Mono',monospace;font-size:13px;color:#0f172a}
#practice-app .pr-ptitle{font-family:'Fraunces',serif;font-weight:600;font-size:22px;color:#0f172a;text-align:center;margin:18px 0 2px}
#practice-app .pr-pmeta{text-align:center;font-size:13px;color:#475569}
#practice-app .pr-cand{display:grid;grid-template-columns:1fr 1fr;gap:12px 20px;margin:22px 0}
#practice-app .pr-cand label{font-size:11px;letter-spacing:.6px;text-transform:uppercase;color:#94A3B8;display:block;margin-bottom:6px}
#practice-app .pr-cand input{width:100%;border:none;border-bottom:1.5px dotted #94a3b8;padding:4px 2px;font-family:'DM Mono',monospace;font-size:14px;color:#0f172a;outline:none;background:transparent}
#practice-app .pr-cand input:focus{border-bottom-color:#6366F1}
#practice-app .pr-instr{border:1px solid #E2E8F0;border-radius:10px;padding:16px 18px;background:#F8FAFC}
#practice-app .pr-instr h4{margin:0 0 8px;font-size:12px;letter-spacing:.8px;text-transform:uppercase;color:#475569}
#practice-app .pr-instr ul{margin:0;padding-left:18px;font-size:13.5px;color:#1E293B}
#practice-app .pr-instr li{margin:4px 0}
#practice-app .pr-total{margin-top:10px;font-weight:600;color:#0f172a}
#practice-app .pr-exambar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:12px;background:rgba(15,23,42,.94);backdrop-filter:blur(8px);border:1px solid rgba(148,163,184,.18);border-radius:12px;padding:10px 16px;margin-bottom:16px;font-size:13px;color:#cbd5e1}
#practice-app .pr-paperbody{padding:22px 24px 6px}
#practice-app .pr-q{display:grid;grid-template-columns:32px 1fr;border-top:1px solid #EEF2F7;padding:20px 0}
#practice-app .pr-q:first-child{border-top:none}
#practice-app .pr-qn{font-family:'DM Mono',monospace;font-weight:500;font-size:16px;color:#0f172a}
#practice-app .pr-qbody{min-width:0}
#practice-app .pr-lead{font-size:15px;color:#0f172a;margin:0 0 4px}
#practice-app .pr-ppart{margin-top:12px}
#practice-app .pr-prow{display:flex;gap:10px;align-items:flex-start}
#practice-app .pr-plabel{font-family:'DM Mono',monospace;font-size:14px;color:#0f172a;flex-shrink:0;min-width:22px}
#practice-app .pr-ptext{flex:1;min-width:0;font-size:14.5px;color:#0f172a}
#practice-app .pr-pm{font-family:'DM Mono',monospace;font-size:13px;color:#475569;flex-shrink:0;white-space:nowrap;padding-top:1px}
#practice-app .pr-pans{margin:9px 0 2px 32px}
#practice-app .pr-short{font-family:'DM Mono',monospace;font-size:15px;letter-spacing:1px;color:#0f172a;background:transparent;border:none;border-bottom:1.5px dotted #94a3b8;padding:4px;min-width:180px;outline:none}
#practice-app .pr-short:focus{border-bottom-color:#6366F1}
#practice-app .pr-lines{width:100%;border:none;outline:none;resize:vertical;font-family:'DM Sans',sans-serif;font-size:14px;color:#0f172a;line-height:31px;padding:0 2px;background:repeating-linear-gradient(transparent,transparent 30px,#cbd5e1 30px,#cbd5e1 31px);min-height:62px}
#practice-app .pr-lines.h3{min-height:93px}#practice-app .pr-lines.h6{min-height:186px}
#practice-app .pr-prq{border-top:1px solid #EEF2F7;padding:14px 0}
#practice-app .pr-rqh{display:flex;align-items:center;gap:10px}
#practice-app .pr-rqn{flex:1;font-family:'DM Mono',monospace;font-size:14px;color:#0f172a}
#practice-app .pr-rqm{font-family:'DM Mono',monospace;font-size:13px;color:#475569}
#practice-app .pr-auto{font-size:12.5px;font-weight:500;padding:3px 10px;border-radius:99px}
#practice-app .pr-auto.ok{background:#ECFDF3;color:#166534}#practice-app .pr-auto.no{background:#FEF2F2;color:#991B1B}
#practice-app .pr-yours{font-size:13px;color:#475569;margin:8px 0 2px}
#practice-app .pr-ms{margin:8px 0 0;padding:12px 14px;background:#F8FAFC;border:1px solid #EEF2F7;border-radius:9px}
#practice-app .pr-ms h5{margin:0 0 6px;font-size:11px;letter-spacing:.8px;text-transform:uppercase;color:#475569}
#practice-app .pr-selfmark2{margin-top:10px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
#practice-app .pr-selfmark2 span{font-size:12.5px;color:#475569}
#practice-app .pr-selfmark2 .pr-mrow{display:inline-flex;gap:6px}

/* Ask Lumira AI tutor panel (guided practice only, not board papers) */
#practice-app .pr-ask-toggle{background:#fff;color:#6366F1;border:1.5px solid #C7CDF6;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:500;cursor:pointer;font-family:'DM Sans',sans-serif;display:inline-flex;align-items:center;gap:8px;margin-top:16px}
#practice-app .pr-ask-toggle:hover{background:#F5F6FF}
#practice-app .pr-ask{margin-top:16px;border:1px solid #E6E9F5;border-radius:12px;overflow:hidden;background:#fff}
#practice-app .pr-ask-head{display:flex;align-items:center;gap:9px;padding:11px 14px;background:linear-gradient(90deg,#EEF0FF,#F5F3FF);border-bottom:1px solid #E6E9F5}
#practice-app .pr-ask-badge{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.8px;text-transform:uppercase;color:#fff;background:#6366F1;border-radius:6px;padding:3px 7px}
#practice-app .pr-ask-title{font-size:13.5px;font-weight:600;color:#0f172a}
#practice-app .pr-ask-note{margin-left:auto;font-size:11px;color:#8A97AD;font-family:'DM Mono',monospace;letter-spacing:.4px}
#practice-app .pr-ask-msgs{padding:12px 14px;display:flex;flex-direction:column;gap:9px;max-height:230px;overflow-y:auto}
#practice-app .pr-ask-msg{font-size:13.5px;line-height:1.55;padding:9px 12px;border-radius:11px;max-width:88%}
#practice-app .pr-ask-msg.user{align-self:flex-end;background:#6366F1;color:#fff;border-bottom-right-radius:4px}
#practice-app .pr-ask-msg.bot{align-self:flex-start;background:#F1F5F9;color:#1E293B;border-bottom-left-radius:4px}
#practice-app .pr-ask-form{display:flex;gap:8px;padding:10px 12px;border-top:1px solid #EEF2F7}
#practice-app .pr-ask-in{flex:1;min-width:0;border:1.5px solid #E2E8F0;border-radius:9px;padding:10px 12px;font-size:14px;font-family:'DM Sans',sans-serif;color:#0f172a;outline:none}
#practice-app .pr-ask-in:focus{border-color:#6366F1}
#practice-app .pr-ask-send{background:#6366F1;color:#fff;border:none;border-radius:9px;padding:0 16px;font-size:14px;font-weight:500;cursor:pointer;font-family:'DM Sans',sans-serif}