/* ============================================
   DunCrew Community Components
   Staircase timeline, trace cards, filters
   ============================================ */

/* ---- Staircase Timeline ---- */
.staircase-wrap{
  background:var(--bg-secondary);border:1px solid var(--border-subtle);
  border-radius:var(--radius-sm);padding:.5rem .6rem;overflow-x:auto;
  scrollbar-width:thin;scrollbar-color:var(--border-medium) transparent;
}
.staircase-wrap::-webkit-scrollbar{height:4px}
.staircase-wrap::-webkit-scrollbar-thumb{background:var(--border-medium);border-radius:2px}
.sc-svg{display:block;min-width:fit-content}

/* ---- Sequence Letters Row ---- */
.seq-letters{
  display:flex;gap:0;
  overflow:hidden; /* no scroll - flex shrinks letters to fit */
}
.seq-letter{
  display:inline-flex;align-items:center;justify-content:center;
  flex:1;min-width:0;height:20px;
  font-family:'JetBrains Mono','Consolas',monospace;
  font-size:.65rem;font-weight:600;letter-spacing:0;
  opacity:0.7;transition:opacity .15s var(--ease);
}
.seq-letter:hover{opacity:1}
.seq-letter.base-E{color:var(--teal)}
.seq-letter.base-P{color:var(--green)}
.seq-letter.base-V{color:var(--amber)}
.seq-letter.base-X{color:var(--purple)}
.seq-letter.seq-err{
  opacity:1;position:relative;
}
.seq-letter.seq-err::after{
  content:'';position:absolute;bottom:1px;left:15%;right:15%;
  height:1.5px;background:var(--coral);border-radius:1px;
}

/* Compact mode: 21-40 bases - smaller text */
.seq-letters.seq-compact .seq-letter{
  font-size:.5rem;height:16px;
}
.seq-letters.seq-compact .seq-letter.seq-err::after{
  left:20%;right:20%;
}

/* Dense mode: 41+ bases - colored dots instead of letters */
.seq-letters.seq-dense .seq-letter{
  font-size:0;height:10px;position:relative;
}
.seq-letters.seq-dense .seq-letter::before{
  content:'';display:block;width:4px;height:4px;border-radius:50%;
  background:currentColor;opacity:0.6;
}
.seq-letters.seq-dense .seq-letter.seq-err::before{
  background:var(--coral);opacity:1;width:5px;height:5px;
}
.seq-letters.seq-dense .seq-letter.seq-err::after{
  display:none;
}

/* ---- Pattern Badges ---- */
.pattern-row{
  display:flex;flex-wrap:wrap;gap:.35rem;
}
.pattern-badge{
  display:inline-flex;align-items:center;gap:3px;
  padding:.1rem .5rem;border-radius:var(--radius-full);
  font-family:'JetBrains Mono','Consolas',monospace;
  font-size:.65rem;font-weight:600;
  border:1px solid transparent;cursor:default;
}
.pattern-icon{font-size:.7rem;line-height:1}
.pattern-good{
  background:rgba(108,180,120,0.1);color:var(--green);
  border-color:rgba(108,180,120,0.25);
}
.pattern-efficient{
  background:rgba(94,186,174,0.1);color:var(--teal);
  border-color:rgba(94,186,174,0.25);
}
.pattern-risky{
  background:rgba(232,168,56,0.1);color:var(--amber);
  border-color:rgba(232,168,56,0.25);
}
.pattern-thorough{
  background:rgba(178,132,190,0.1);color:var(--purple);
  border-color:rgba(178,132,190,0.25);
}
.pattern-methodical{
  background:rgba(178,132,190,0.08);color:var(--purple);
  border-color:rgba(178,132,190,0.2);
}

/* ---- Trace Card ---- */
.trace-card{
  padding:1.5rem;display:flex;flex-direction:column;gap:.75rem;cursor:default;
}
.trace-card .card-header{
  display:flex;align-items:center;justify-content:space-between;gap:.75rem;
}
.trace-card .card-title{
  font-size:1rem;font-weight:600;color:var(--text-primary);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1;
}
.trace-card .card-badge{
  display:inline-flex;align-items:center;gap:4px;
  padding:.2rem .65rem;border-radius:var(--radius-full);font-size:.7rem;font-weight:600;
  flex-shrink:0;
}
.trace-card .card-badge.success{
  background:var(--green-glow);color:var(--green);border:1px solid rgba(108,180,120,0.3);
}
.trace-card .card-badge.fail{
  background:rgba(220,120,100,0.08);color:var(--coral);border:1px solid rgba(220,120,100,0.25);
}

/* Chip row */
.trace-chips{display:flex;flex-wrap:wrap;gap:.4rem}
.trace-chip{
  display:inline-flex;align-items:center;gap:4px;
  padding:.15rem .55rem;border-radius:var(--radius-full);
  font-size:.7rem;font-weight:500;background:var(--bg-secondary);
  color:var(--text-secondary);border:1px solid var(--border-subtle);
}
.trace-chip .chip-icon{width:12px;height:12px;opacity:.6}

/* Stats row */
.trace-stats{
  display:flex;flex-wrap:wrap;gap:.75rem;font-size:.75rem;color:var(--text-muted);
}
.trace-stat{display:inline-flex;align-items:center;gap:4px}
.trace-stat .stat-val{font-weight:600;color:var(--text-secondary);font-family:'JetBrains Mono',monospace}
.dist-dot{display:inline-block;width:8px;height:8px;border-radius:50%}

/* Contributor row */
.trace-contrib{
  display:flex;align-items:center;gap:.5rem;padding-top:.5rem;
  border-top:1px solid var(--border-subtle);font-size:.75rem;color:var(--text-muted);
}
.trace-contrib .contrib-avatar{
  width:22px;height:22px;border-radius:50%;background:var(--teal-glow);
  display:flex;align-items:center;justify-content:center;
  font-size:.65rem;font-weight:700;color:var(--teal);border:1px solid rgba(94,186,174,0.25);
}

/* ---- Filter Bar ---- */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:.75rem;
  padding:.85rem 1.25rem;background:var(--bg-panel);
  border:1px solid var(--border-subtle);border-radius:var(--radius-xl);
  margin-bottom:1.5rem;
}
.filter-bar label{font-size:.8rem;font-weight:600;color:var(--text-secondary)}
.filter-select{
  padding:.35rem .85rem;border:1.5px solid var(--border-medium);border-radius:var(--radius-full);
  background:var(--bg-primary);color:var(--text-primary);font-size:.8rem;font-weight:500;
  cursor:pointer;transition:border-color .15s var(--ease);appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23aa9b87'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 10px center;padding-right:28px;
}
.filter-select:focus{border-color:var(--teal);outline:none}
.filter-search{
  flex:1;min-width:160px;padding:.35rem .85rem;
  border:1.5px solid var(--border-medium);border-radius:var(--radius-full);
  background:var(--bg-primary);color:var(--text-primary);font-size:.8rem;
  transition:border-color .15s var(--ease);
}
.filter-search:focus{border-color:var(--teal);outline:none}
.filter-search::placeholder{color:var(--text-muted)}

/* ---- Community Feed Grid ---- */
.feed-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.25rem;
}

/* ---- Community Stats Banner ---- */
.community-stats{
  display:flex;flex-wrap:wrap;justify-content:center;gap:2rem;
  padding:1.5rem;margin-bottom:2rem;
}
.stat-block{text-align:center}
.stat-block .stat-number{
  font-size:2rem;font-weight:800;font-family:'JetBrains Mono',monospace;
  background:var(--gradient-text);-webkit-background-clip:text;
  -webkit-text-fill-color:transparent;background-clip:text;
}
.stat-block .stat-label{font-size:.8rem;color:var(--text-muted);margin-top:.15rem}

/* ---- Toast ---- */
.toast{
  position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);
  padding:.75rem 1.5rem;border-radius:var(--radius-full);
  background:var(--text-primary);color:var(--bg-primary);
  font-size:.85rem;font-weight:500;box-shadow:0 8px 32px rgba(60,50,40,0.2);
  z-index:999;opacity:0;transition:all .35s var(--ease);pointer-events:none;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---- Community Hero ---- */
.community-hero{
  position:relative;padding:7rem 0 3rem;text-align:center;overflow:hidden;
}
.community-hero .hero-title{
  font-size:2.75rem;font-weight:800;letter-spacing:-0.03em;margin-bottom:1rem;
}
.community-hero .hero-desc{
  font-size:1.1rem;color:var(--text-secondary);max-width:600px;margin:0 auto 2rem;line-height:1.8;
}

/* ---- Data Browser Hero ---- */
.browser-hero{
  position:relative;padding:7rem 0 2rem;overflow:hidden;
}
.browser-hero .hero-title{
  font-size:2.25rem;font-weight:800;letter-spacing:-0.02em;margin-bottom:.75rem;
}
.browser-hero .hero-desc{
  font-size:1rem;color:var(--text-secondary);max-width:520px;line-height:1.7;
}

/* ---- Responsive ---- */
@media(max-width:768px){
  .feed-grid{grid-template-columns:1fr}
  .community-hero .hero-title{font-size:2rem}
  .browser-hero .hero-title{font-size:1.75rem}
  .community-stats{gap:1.25rem}
  .stat-block .stat-number{font-size:1.5rem}
  .filter-bar{flex-direction:column;align-items:stretch}
  .trace-card{padding:1.25rem}
}
@media(max-width:480px){
  .community-hero{padding:5.5rem 0 2rem}
  .browser-hero{padding:5.5rem 0 1.5rem}
  .trace-card{padding:1rem;gap:.6rem}
  .staircase-wrap{padding:.35rem .4rem}
}