/* Shared styles for /problems/ hub, solve pages, leaderboard */
.problems-hero{text-align:center;padding:2.2rem 1.2rem 1.6rem;border-bottom:1px solid var(--bdr);background:linear-gradient(120deg,rgba(56,189,248,.1),rgba(167,139,250,.08),rgba(45,212,191,.06))}
.problems-hero h1{font-size:clamp(1.5rem,4vw,2.1rem);font-weight:800;color:var(--heading,#f8fafc);margin-bottom:.4rem}
.problems-hero p{color:var(--sl);max-width:520px;margin:0 auto;font-size:.95rem}
.problems-wrap{max-width:960px;margin:0 auto;padding:1.5rem 1rem 3rem}
.section-label{font-size:.72rem;font-weight:800;color:var(--sl);text-transform:uppercase;letter-spacing:.06em;margin:1.6rem 0 .75rem}

.today-card{background:var(--bg2);border:1px solid rgba(56,189,248,.35);border-radius:14px;padding:1.2rem 1.3rem;margin-bottom:1rem}
.today-card h2{font-size:1.05rem;color:var(--heading,#f8fafc);margin:.35rem 0 .4rem}
.today-card p{font-size:.88rem;color:var(--sl);margin-bottom:.8rem}
.today-badge{display:inline-block;font-size:.65rem;font-weight:800;color:var(--blue);background:rgba(56,189,248,.12);padding:.2rem .55rem;border-radius:10px;text-transform:uppercase}
.btn-row{display:flex;flex-wrap:wrap;gap:.6rem}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#38bdf8,#2dd4bf);color:#020617;border:none;border-radius:8px;padding:.55rem 1.1rem;font-weight:700;font-size:.88rem;text-decoration:none;cursor:pointer}
.btn-primary:hover{text-decoration:none;filter:brightness(1.05)}
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;background:var(--bg3);color:var(--text);border:1px solid var(--bdr);border-radius:8px;padding:.55rem 1.1rem;font-weight:600;font-size:.88rem;text-decoration:none}
.btn-secondary:hover{border-color:var(--blue);color:var(--blue);text-decoration:none}

.problem-list{display:flex;flex-direction:column;gap:.65rem}
.problem-row{display:flex;align-items:center;gap:.85rem;background:var(--bg2);border:1px solid var(--bdr);border-radius:12px;padding:.9rem 1rem;text-decoration:none;color:inherit;transition:border-color .15s}
.problem-row:hover{border-color:rgba(56,189,248,.4);text-decoration:none}
.problem-row.solved{border-color:rgba(74,222,128,.35)}
.problem-diff{font-size:.65rem;font-weight:800;text-transform:uppercase;padding:.2rem .5rem;border-radius:8px;flex-shrink:0}
.problem-diff.easy{color:#16a34a;background:rgba(74,222,128,.12)}
.problem-diff.medium{color:#b45309;background:rgba(251,191,36,.14)}
.problem-diff.hard{color:#dc2626;background:rgba(248,113,113,.14)}
.problem-body{flex:1;min-width:0}
.problem-title{font-weight:700;color:var(--heading,#f8fafc);font-size:.95rem}
.problem-meta{font-size:.78rem;color:var(--sl);margin-top:.15rem}
.problem-pts{font-size:.8rem;font-weight:700;color:var(--teal);flex-shrink:0}
.problem-seo{background:var(--bg2,#080d1a);border:1px solid var(--bdr,rgba(148,163,184,.1));border-radius:14px;padding:1.25rem 1.35rem;margin:0 0 1.4rem;color:var(--sl,#94a3b8);font-size:.92rem;line-height:1.7}
.problem-seo h2{color:var(--heading,#f8fafc);font-size:1.05rem;margin:1.15rem 0 .45rem}
.problem-seo .crumb{font-size:.8rem;margin-bottom:.8rem}
.problem-seo details{margin:.45rem 0;padding:.55rem .7rem;border:1px solid var(--bdr,rgba(148,163,184,.1));border-radius:8px}
.problem-seo summary{cursor:pointer;color:var(--heading,#f8fafc);font-weight:650}
.starter-pre{background:#020617;border:1px solid var(--bdr,rgba(148,163,184,.1));border-radius:10px;padding:.9rem 1rem;overflow-x:auto;font-family:'JetBrains Mono',monospace;font-size:.78rem;color:#e2e8f0}
.ports-static table,.spec-box table{width:100%;border-collapse:collapse;font-size:.82rem}
.ports-static th,.ports-static td,.spec-box th,.spec-box td{border:1px solid var(--bdr,rgba(148,163,184,.1));padding:.4rem .55rem;text-align:left}

.board-card{background:var(--bg2);border:1px solid var(--bdr);border-radius:14px;padding:1rem;margin-bottom:1rem}
.board-row{display:flex;align-items:center;gap:.75rem;padding:.65rem .2rem;border-bottom:1px solid var(--bdr)}
.board-row:last-child{border-bottom:none}
.board-row.you{background:rgba(56,189,248,.06);border-radius:8px;padding-left:.5rem;padding-right:.5rem}
.board-rank{width:28px;font-weight:800;color:var(--sl);font-size:.9rem;text-align:center}
.board-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#38bdf8,#a78bfa);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.75rem;overflow:hidden;flex-shrink:0}
.board-avatar img{width:100%;height:100%;object-fit:cover}
.board-name{flex:1;font-weight:700;color:var(--heading,#f8fafc);font-size:.9rem}
.board-stats{font-size:.78rem;color:var(--sl);text-align:right}
.board-stats b{color:var(--teal);font-size:.92rem}

/* Solve page */
.solve-layout{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;align-items:start}
@media(max-width:900px){.solve-layout{grid-template-columns:1fr}}
.solve-panel{background:var(--bg2);border:1px solid var(--bdr);border-radius:14px;padding:1.15rem}
.diff-badge{display:inline-block;font-size:.68rem;font-weight:800;padding:.25rem .7rem;border-radius:20px;text-transform:uppercase;margin-right:.4rem}
.diff-badge.easy{color:#16a34a;background:rgba(74,222,128,.12)}
.diff-badge.medium{color:#b45309;background:rgba(251,191,36,.14)}
.diff-badge.hard{color:#dc2626;background:rgba(248,113,113,.14)}
#solvedBadge{display:none;font-size:.72rem;font-weight:800;color:#16a34a;background:rgba(74,222,128,.12);padding:.25rem .7rem;border-radius:20px;text-transform:uppercase}
.pass-banner{display:none;background:rgba(74,222,128,.12);border:1px solid rgba(74,222,128,.35);border-radius:10px;padding:.85rem 1rem;margin:1rem 0;color:var(--text);font-size:.9rem}
.pass-banner.show{display:block}
.spec-box{font-size:.9rem;color:var(--text);margin-bottom:1rem;line-height:1.65}
.concept-box{background:rgba(56,189,248,.06);border:1px solid rgba(56,189,248,.2);border-radius:10px;padding:1rem;margin-bottom:1rem;font-size:.87rem;color:var(--sl)}
.concept-box b{color:var(--heading,#f8fafc)}
.concept-box code,.spec-box code{background:var(--bg3);color:#38bdf8;padding:.1rem .35rem;border-radius:4px;font-family:'JetBrains Mono',monospace;font-size:.83rem;font-variant-ligatures:none;-webkit-font-variant-ligatures:none}
.ports-wrap{overflow-x:auto;margin-bottom:1rem;border:1px solid var(--bdr);border-radius:10px}
.ports-wrap table{width:100%;border-collapse:collapse;font-family:'JetBrains Mono',monospace;font-size:.78rem}
.ports-wrap th{background:var(--bg3);color:var(--teal);text-align:left;padding:.5rem .7rem;border-bottom:1px solid var(--bdr)}
.ports-wrap td{padding:.45rem .7rem;border-bottom:1px solid var(--bdr);color:var(--text)}
.wavedrom-expected{background:#fff;border-radius:8px;padding:.75rem;margin-bottom:1rem;overflow-x:auto}
.wavedrom-label{font-size:.7rem;font-weight:800;color:var(--teal);text-transform:uppercase;letter-spacing:.04em;margin-bottom:.5rem}
.editor-label{font-size:.8rem;color:var(--sl);margin-bottom:.4rem;display:flex;justify-content:space-between;align-items:center}
.reset-link{font-size:.78rem;color:var(--sl);cursor:pointer;background:none;border:none;font-family:inherit}
.reset-link:hover{color:var(--blue)}
.editor-wrap{position:relative;height:280px;background:#000814;border:1px solid var(--bdr);border-radius:10px;overflow:hidden}
.editor-wrap:focus-within{border-color:var(--blue)}
#hl-layer{position:absolute;inset:0;margin:0;border:0;padding:1rem;font-family:'JetBrains Mono',monospace;font-size:.88rem;line-height:1.6;tab-size:2;white-space:pre;overflow:auto;pointer-events:none;user-select:none;color:#e2e8f0;background:transparent;scrollbar-width:none;font-variant-ligatures:none;-webkit-font-variant-ligatures:none}
#hl-layer::-webkit-scrollbar{display:none}
#editor{position:absolute;inset:0;width:100%;height:100%;background:transparent!important;color:transparent!important;caret-color:#7dd3fc;border:none!important;outline:none;resize:none;padding:1rem;font-family:'JetBrains Mono',monospace;font-size:.88rem;line-height:1.6;tab-size:2;overflow:auto;font-variant-ligatures:none;-webkit-font-variant-ligatures:none}
#editor::selection{background:rgba(56,189,248,.25)}
.hl-mod{color:#38bdf8}.hl-type{color:#fbbf24}.hl-ctrl{color:#a78bfa}.hl-edge{color:#2dd4bf}
.hl-num{color:#fb923c}.hl-str{color:#86efac}.hl-cmt{color:#4a5f72;font-style:italic}.hl-sys{color:#7dd3fc}.hl-pre{color:#f472b6}
.hl-op{color:#f43f5e;font-weight:700}
.actions{display:flex;flex-wrap:wrap;gap:.7rem;margin:1rem 0}
#submit-btn{background:var(--blue);color:#020617;border:none;padding:.7rem 1.4rem;border-radius:8px;font-weight:700;font-size:.9rem;cursor:pointer}
#submit-btn:hover{filter:brightness(1.08)}
#submit-btn:disabled{opacity:.6;cursor:default}
#console{background:#000814;border:1px solid var(--bdr);border-radius:10px;padding:1rem;font-family:'JetBrains Mono',monospace;font-size:.82rem;white-space:pre-wrap;min-height:90px;color:#94a3b8}
#console .ok{color:#4ade80}#console .err{color:#f87171}#console .warn{color:#fbbf24}#console .info{color:#38bdf8}#console .dim{color:#64748b}
.waveform-box{background:#000814;border:1px solid var(--bdr);border-radius:10px;padding:.9rem;overflow-x:auto;margin-top:.5rem}
.empty-state{text-align:center;color:var(--sl);padding:1.5rem;font-size:.88rem}
.user-stats{font-size:.85rem;color:var(--sl);margin-top:.5rem}
.user-stats b{color:var(--heading,#f8fafc)}

:root[data-theme="light"] .editor-wrap,:root[data-theme="light"] #console,:root[data-theme="light"] .waveform-box{background:#0b1220}
:root[data-theme="light"] .problem-title,:root[data-theme="light"] .board-name,:root[data-theme="light"] .problems-hero h1{color:var(--heading)!important}

/* Share-your-solve card */
.share-card-panel{display:none;background:var(--bg2);border:1px solid rgba(56,189,248,.25);border-radius:12px;padding:1rem;margin:1rem 0}
.share-card-panel.show{display:block}
.share-card-label{font-size:.72rem;font-weight:800;color:var(--teal);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.65rem}
.share-card-canvas-wrap{border-radius:10px;overflow:hidden;margin-bottom:.85rem;line-height:0}
.share-card-canvas-wrap img{width:100%;height:auto;display:block;border-radius:10px}
.share-actions{display:flex;flex-wrap:wrap;gap:.55rem}
.share-btn{display:inline-flex;align-items:center;gap:.4rem;background:var(--bg3);color:var(--text);border:1px solid var(--bdr);border-radius:8px;padding:.5rem 1rem;font-weight:600;font-size:.85rem;text-decoration:none;cursor:pointer;font-family:inherit}
.share-btn:hover{border-color:var(--blue);color:var(--blue);text-decoration:none}
.share-btn.whatsapp:hover{border-color:#25d366;color:#25d366}
.share-btn.linkedin:hover{border-color:#0a66c2;color:#0a66c2}
.share-btn.x:hover{border-color:#e2e8f0;color:#e2e8f0}