/* ==========================================================================
   Revision-guide landing blocks (2026-10-15).
   Additive: Revision Arcade banner, breadcrumb, quick-start tiles, quick check,
   mini-lesson finder, free prompt-book box, next-topic row.
   Loaded by revise/*.html only; every class is prefixed lp-.
   ========================================================================== */

/* ── Revision Arcade marquee (same look as the games pages, compact) ── */
.lp-arcade{display:block;text-decoration:none;position:relative;overflow:hidden;
  background:#06061c;border-bottom:3px solid #2e2e7c;
  padding:calc(var(--nav-h) + 14px) 1.2rem 16px;
  background-image:radial-gradient(ellipse 55% 85% at 12% 0%,rgba(139,92,246,.38),transparent),
    radial-gradient(ellipse 50% 95% at 88% 100%,rgba(31,184,154,.24),transparent)}
.lp-arcade::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(0,0,0,.16) 0 1px,transparent 1px 3px)}
.lp-ab-inner{max-width:1180px;margin:0 auto;position:relative;z-index:1;
  display:flex;align-items:center;justify-content:center;gap:26px;text-align:center}
.lp-ab-mascot{flex:0 0 auto;line-height:0}
.lp-ab-mascot svg{display:block;width:64px;height:64px;filter:drop-shadow(0 0 12px rgba(126,109,255,.55));transition:transform .18s ease}
.lp-ab-mascot.flip svg{transform:scaleX(-1)}
.lp-arcade:hover .lp-ab-mascot svg{transform:translateY(-3px)}
.lp-arcade:hover .lp-ab-mascot.flip svg{transform:translateY(-3px) scaleX(-1)}
.lp-ab-copy{display:flex;flex-direction:column;align-items:center;gap:6px;min-width:0}
.lp-ab-over{font-family:'Press Start 2P',ui-monospace,monospace;font-size:9px;letter-spacing:3px;color:#1fb89a;text-shadow:0 0 8px rgba(31,184,154,.7);line-height:12px}
.lp-ab-title{font-family:'Press Start 2P',ui-monospace,monospace;font-size:clamp(17px,2.9vw,28px);line-height:1.3;
  color:#ffd83d;letter-spacing:2px;animation:lpflicker 4s infinite;white-space:nowrap;
  text-shadow:0 0 6px rgba(255,216,61,.85),0 0 24px rgba(255,159,28,.55),3px 3px 0 #7a2bd6}
@keyframes lpflicker{0%,93%,96%,100%{opacity:1}94%{opacity:.75}95%{opacity:.92}}
.lp-ab-sub{font-family:'VT323',ui-monospace,monospace;font-size:clamp(15px,1.9vw,20px);letter-spacing:2px;line-height:1.15;
  color:#00f0ff;text-shadow:0 0 10px rgba(0,240,255,.55)}
.lp-ab-go{display:flex;flex-direction:column;align-items:center;gap:8px;flex:0 0 auto}
.lp-ab-cta{display:inline-flex;align-items:center;gap:8px;font-family:'Press Start 2P',ui-monospace,monospace;font-size:11px;letter-spacing:1px;color:#241a00;
  background:linear-gradient(180deg,#ffe95c,#ffc800 55%,#ffb400);padding:13px 18px;border-radius:11px;white-space:nowrap;
  box-shadow:0 0 22px rgba(255,206,31,.6),inset 0 2px 0 #fff3b0,0 3px 0 #a9760a}
.lp-arcade:hover .lp-ab-cta{filter:brightness(1.07)}
.lp-ab-coin{font-family:'Press Start 2P',ui-monospace,monospace;font-size:9px;letter-spacing:2px;color:#ff2d95;line-height:12px;
  animation:lpblink 1.1s steps(1) infinite;text-shadow:0 0 8px rgba(255,45,149,.8)}
@keyframes lpblink{50%{opacity:0}}
@media (prefers-reduced-motion:reduce){.lp-ab-title,.lp-ab-coin,.lp-ab-mascot svg{animation:none;transition:none}}
@media (max-width:760px){
  .lp-arcade{padding:calc(var(--nav-h) + 12px) 1rem 14px}
  .lp-ab-inner{flex-wrap:wrap;gap:10px 14px}
  .lp-ab-mascot.flip{display:none}
  .lp-ab-mascot svg{width:46px;height:46px}
  .lp-ab-over{display:none}
  .lp-ab-go{flex-direction:row;gap:10px;flex-basis:100%;justify-content:center}
  .lp-ab-cta{padding:11px 14px;font-size:10px}
}
@media (max-width:420px){.lp-ab-title{font-size:15px;letter-spacing:1px}.lp-ab-coin{display:none}}

/* The marquee now clears the fixed nav, so the hero no longer needs to. */
.lp-arcade + .page-hero{padding-top:30px;padding-bottom:34px}
@media (max-width:760px){.lp-arcade + .page-hero{padding:24px 1.1rem 26px}}
.lp-arcade + .page-hero h1{margin-bottom:.6rem}
.lp-arcade + .page-hero p{margin-bottom:1.3rem}
.lp-arcade + .page-hero + .section{padding-top:40px}
@media (max-width:760px){.lp-arcade + .page-hero + .section{padding-top:28px}}

/* ── Breadcrumb ── */
.lp-crumbs{font-size:13px;color:var(--text-secondary);margin:0 0 12px;display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.lp-crumbs a{color:var(--text-secondary);text-decoration:none;border-bottom:1px solid var(--border)}
.lp-crumbs a:hover{color:var(--accent);border-color:var(--accent)}
.lp-crumbs .sep{color:var(--text-muted)}

/* ── Quick-start tiles ── */
.lp-tiles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;max-width:1040px;margin-top:4px}
.lp-tile{display:flex;align-items:center;gap:12px;text-decoration:none;min-height:78px;
  background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:12px 14px;
  box-shadow:var(--shadow-sm);transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}
.lp-tile:hover{transform:translateY(-2px);box-shadow:var(--shadow-card);border-color:var(--c,var(--accent))}
.lp-tile:focus-visible{outline:3px solid var(--c,var(--accent));outline-offset:2px}
.lp-tile .ic{flex:0 0 auto;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-family:'Playfair Display',serif;font-weight:700;font-size:22px;color:#fff;background:var(--c,var(--accent))}
.lp-tile .tx{min-width:0;display:flex;flex-direction:column;gap:2px}
.lp-tile b{font-size:15px;color:var(--text-primary);line-height:1.25}
.lp-tile span.d{font-size:12.5px;color:var(--text-secondary);line-height:1.35}
.lp-tile.learn{--c:#2b6cb0}
.lp-tile.velvet{--c:#0a6b5e}
.lp-tile.velvet .ic{background:var(--velvet-gradient)}
.lp-tile.play{--c:#ffc800;background:#0b0b2a;border-color:#2e2e7c}
.lp-tile.play b{color:#ffd83d;font-family:'Press Start 2P',ui-monospace,monospace;font-size:11px;letter-spacing:1px;line-height:1.5}
.lp-tile.play span.d{color:#9fe9f5}
.lp-tile.play .ic{background:linear-gradient(180deg,#ffe95c,#ffb400);color:#241a00;font-size:18px;font-family:inherit}
.lp-tile.pdf{--c:#7a4fd6}
.lp-tile.pdf .ic{background:none;width:40px;height:56px;border-radius:4px;overflow:hidden;box-shadow:0 2px 6px rgba(0,0,0,.25)}
.lp-tile.pdf .ic img{width:40px;height:56px;object-fit:cover;display:block}
@media (max-width:1000px){.lp-tiles{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){
  .lp-tiles{gap:8px}
  .lp-tile{flex-direction:column;align-items:flex-start;gap:8px;min-height:0;padding:11px 12px}
  .lp-tile .ic{width:36px;height:36px;font-size:18px;border-radius:10px}
  .lp-tile.pdf .ic{width:30px;height:42px}.lp-tile.pdf .ic img{width:30px;height:42px}
  .lp-tile b{font-size:14px}.lp-tile.play b{font-size:10px}
  .lp-tile span.d{font-size:12px}
}

/* ── Quick check (built by landing.js from the first common mistake) ── */
.lp-qc{background:var(--bg-card);border:1px solid var(--border-accent);border-radius:16px;padding:18px 20px;margin:0 0 26px;box-shadow:var(--shadow-sm)}
.lp-qc .ey{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin-bottom:6px}
.lp-qc .qq{font-weight:600;font-size:16px;color:var(--text-primary);margin-bottom:12px;line-height:1.45}
.lp-qc .opts{display:flex;flex-wrap:wrap;gap:10px}
.lp-qc button{font:inherit;font-size:14px;font-weight:600;text-align:left;cursor:pointer;
  background:var(--bg-secondary);border:1.5px solid var(--border);border-radius:12px;padding:10px 14px;color:var(--text-primary);flex:1 1 220px;line-height:1.4}
.lp-qc button:hover:not([disabled]){border-color:var(--accent)}
.lp-qc button[disabled]{cursor:default}
.lp-qc button.ok{border-color:#0a6b5e;background:rgba(10,107,94,.1)}
.lp-qc button.no{border-color:#c0392b;background:rgba(192,57,43,.08)}
.lp-qc .fb{margin-top:12px;font-size:14px;color:var(--text-secondary);line-height:1.6}
.lp-qc .fb b{color:var(--text-primary)}
.lp-qc .fb a{color:var(--accent);font-weight:600}

/* ── Key concepts: two columns on wider screens; phones show the first few ── */
@media (min-width:720px){.rv-concepts{display:grid;grid-template-columns:1fr 1fr;gap:10px}}
@media (max-width:719px){.rv-concepts.lp-folded .rv-c.lp-more{display:none}}
@media (min-width:720px){.lp-showall{display:none}}
.lp-showall{margin-top:10px;font:inherit;font-size:14px;font-weight:600;color:var(--accent);background:none;border:1px dashed var(--border-accent);border-radius:10px;padding:9px 14px;cursor:pointer;width:100%}

/* ── Mini-lesson finder ── */
.lp-learn{margin:2.2rem 0 0;border-radius:18px;padding:20px 22px;background:linear-gradient(135deg,rgba(43,108,176,.07),rgba(74,63,160,.06));border:1px solid rgba(43,108,176,.22);scroll-margin-top:90px}
.lp-learn .hd{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.lp-learn .hd .ic{width:40px;height:40px;border-radius:11px;background:#2b6cb0;color:#fff;display:grid;place-items:center;font-family:'Playfair Display',serif;font-weight:700;font-size:20px;flex:0 0 auto}
.lp-learn .ttl{font-family:'Playfair Display',serif;font-size:1.3rem;font-weight:700;color:var(--text-primary);line-height:1.25}
.lp-learn .sub{font-size:14px;color:var(--text-secondary);margin:0 0 14px;line-height:1.6}
.lp-learn ul{list-style:none;display:flex;flex-direction:column;gap:8px;margin:0;padding:0}
.lp-learn li a{display:flex;align-items:center;gap:12px;text-decoration:none;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:10px 14px;transition:border-color .15s ease,transform .15s ease}
.lp-learn li a:hover{border-color:#2b6cb0;transform:translateX(2px)}
.lp-learn .bd{flex:0 0 auto;font-family:'DM Mono',monospace;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:#2b6cb0;background:rgba(43,108,176,.1);border-radius:8px;padding:4px 8px;min-width:64px;text-align:center}
.lp-learn .ln{flex:1 1 auto;font-size:14.5px;font-weight:600;color:var(--text-primary);line-height:1.35}
.lp-learn .ar{flex:0 0 auto;color:#2b6cb0;font-weight:700}
.lp-learn .others{margin-top:12px;font-size:13.5px;color:var(--text-secondary);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.lp-learn .others a{font-size:13px;text-decoration:none;color:#2b6cb0;border:1px solid rgba(43,108,176,.3);background:var(--bg-card);border-radius:20px;padding:5px 12px}
.lp-learn .others a:hover{background:rgba(43,108,176,.08)}

/* ── Free prompt-book box ── */
.lp-book{display:flex;gap:20px;align-items:center;margin:2.2rem 0 0;background:var(--bg-card);border:1px solid var(--border);border-left:5px solid var(--accent);border-radius:16px;padding:18px 22px;box-shadow:var(--shadow-sm)}
.lp-book img{flex:0 0 auto;width:96px;height:134px;object-fit:cover;border-radius:6px;box-shadow:0 6px 18px rgba(0,0,0,.22)}
.lp-book .ey{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin-bottom:4px}
.lp-book .ttl{font-family:'Playfair Display',serif;font-size:1.3rem;font-weight:700;color:var(--text-primary);margin-bottom:6px;line-height:1.25}
.lp-book p{font-size:14px;color:var(--text-secondary);line-height:1.6;margin:0 0 12px}
.lp-book .btn{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-family:'DM Mono',monospace;font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:#fff;background:var(--velvet-gradient);border-radius:10px;padding:11px 16px}
.lp-book .more{margin-left:12px;font-size:13px;color:var(--accent)}
@media (max-width:520px){.lp-book{flex-direction:column;align-items:flex-start;padding:16px}.lp-book img{width:80px;height:112px}.lp-book .more{display:block;margin:10px 0 0}}

/* ── Next-topic row ── */
.lp-nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.lp-nav a{text-decoration:none;font-size:14px;font-weight:600;color:var(--accent);background:var(--accent-soft);border:1px solid var(--border-accent);border-radius:12px;padding:10px 14px}
.lp-nav a.next{margin-left:auto;background:var(--accent);color:#fff;border-color:var(--accent)}
.lp-nav a.next:hover{background:var(--accent-dark)}
@media (max-width:520px){.lp-nav a{flex:1 1 100%;text-align:center}.lp-nav a.next{margin-left:0}}

/* ── Grammar spine card on language hubs ── */
.lp-spine{display:flex;align-items:center;gap:14px;text-decoration:none;margin:.4rem 0 1rem;background:#fff8e6;border:2px solid #2c2840;border-radius:16px;padding:14px 16px;box-shadow:0 4px 0 rgba(44,40,64,.85);transition:transform .15s ease}
.lp-spine:hover{transform:translateY(-2px)}
.lp-spine .n{flex:0 0 auto;width:48px;height:48px;border-radius:50%;background:#2c2840;color:#ffd83d;display:grid;place-items:center;font-weight:800;font-size:13px}
.lp-spine b{display:block;color:#2c2840;font-size:15.5px}
.lp-spine span{display:block;color:#5d566f;font-size:13.5px;line-height:1.45}

/* ── What your exam board covers (units from the board specifications) ── */
.lp-spec{margin:2.2rem 0 0}
.lp-spec h2{margin-top:0}
.lp-spec .sub{font-size:14px;color:var(--text-secondary);margin:0 0 12px;line-height:1.6}
.lp-sb{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:8px;overflow:hidden}
.lp-sb summary{display:flex;align-items:center;gap:10px;cursor:pointer;padding:11px 14px;list-style:none}
.lp-sb summary::-webkit-details-marker{display:none}
.lp-sb summary::after{content:"+";margin-left:auto;color:var(--accent);font-weight:700;font-size:18px;line-height:1}
.lp-sb[open] summary::after{content:"–"}
.lp-sb .bd{flex:0 0 auto;font-family:'DM Mono',monospace;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--accent);background:var(--accent-soft);border-radius:8px;padding:4px 8px;min-width:64px;text-align:center}
.lp-sb .un{font-weight:600;font-size:14.5px;color:var(--text-primary);line-height:1.35}
.lp-sb .cd{flex:0 0 auto;font-family:'DM Mono',monospace;font-size:11px;color:var(--text-muted)}
.lp-sb ul{margin:0 14px 8px 32px;padding:0;font-size:14px;color:var(--text-secondary);line-height:1.6}
.lp-sb .path{margin:0 14px 8px;font-size:14px;color:var(--text-secondary)}
.lp-sb .src{margin:0 14px 12px;font-size:12px;color:var(--text-muted)}
.lp-sb .src a{color:var(--text-muted)}
@media (max-width:520px){.lp-sb .cd{display:none}}