/* ===== hub page styles ===== */
:root{
  --hub-bg:#231f20; --hub-text:#fff;
  --hub-muted:rgba(255,255,255,.75);
  --hub-soft:rgba(255,255,255,.08);
  --hub-soft-border:rgba(255,255,255,.15);
  --hub-card-bg:rgba(255,255,255,.06);
  --hub-card-border:rgba(255,255,255,.12);
}

body.hub-page{ background:var(--hub-bg); color:var(--hub-text); }

.hub-wrap{
  min-height:100vh;
  padding:8rem 2rem 6rem;
  font-family:var(--font-ui,'PPTelegraf','PP Telegraf',system-ui,sans-serif);
  max-width:1400px;
  margin:0 auto;
}

/* hero */
.hub-hero{
  max-width:1100px; 
  margin:0 auto 3rem;
  text-align:center;
}

.hub-title{
  margin:0 0 0.5rem;
  font-size:clamp(2.2rem,5vw,4rem);
  line-height:1.15; 
  font-weight:700;
  font-family:var(--font-heading,'PPTelegraf','PP Telegraf',system-ui,sans-serif);
  text-transform:none;
}

.hub-subtitle{
  font-size:clamp(1rem,1.5vw,1.25rem);
  color:var(--hub-muted);
  margin:0;
  font-weight:400;
}

/* loading/error/empty states */
.hub-loading,
.hub-error,
.hub-empty{
  text-align:center;
  padding:4rem 2rem;
  color:var(--hub-muted);
}

.hub-error p{ margin-bottom:1.5rem; }

.btn-retry{
  background:var(--hub-soft);
  border:1px solid var(--hub-soft-border);
  color:#fff;
  padding:.75rem 2rem;
  border-radius:8px;
  font:inherit;
  cursor:pointer;
  transition:background .25s ease;
}

.btn-retry:hover{
  background:rgba(255,255,255,.15);
}

/* sections */
.hub-section{
  margin:4rem 0;
}

.hub-section-title{
  font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:700;
  margin:0 0 1rem;
  text-transform:none;
}

.hub-section-desc{
  color:var(--hub-muted);
  margin:0 0 2rem;
  font-size:clamp(0.9rem,1.2vw,1rem);
}

/* grid */
.hub-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:1.5rem;
  margin-top:2rem;
}

@media (max-width:600px){
  .hub-grid{
    grid-template-columns:1fr;
  }
}

/* cards */
.hub-card{
  background:var(--hub-card-bg);
  border:1px solid var(--hub-card-border);
  border-radius:12px;
  padding:1.75rem;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  position:relative;
}

.hub-card--registered{
  cursor:pointer;
}

.hub-card--registered:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(0,0,0,.2);
  border-color:rgba(255,255,255,.25);
}

.hub-card--eligible{
  opacity:.85;
  border-style:dashed;
}

.hub-card__logo{
  width:48px;
  height:48px;
  object-fit:contain;
  margin-bottom:1rem;
  border-radius:8px;
}

.hub-card__title{
  font-size:clamp(1.25rem,2vw,1.5rem);
  font-weight:700;
  margin:0 0 0.5rem;
  text-transform:none;
  line-height:1.3;
}

.hub-card__desc{
  font-size:clamp(0.85rem,1.1vw,0.95rem);
  color:var(--hub-muted);
  margin:0;
  line-height:1.5;
  text-transform:none;
}

/* tooltip */
.hub-card__tooltip-wrapper{
  position:relative;
  display:inline-block;
  margin-left:0.5rem;
}

.hub-card__tooltip-trigger{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:18px;
  height:18px;
  border-radius:50%;
  background:rgba(255,255,255,0.15);
  border:1px solid rgba(255,255,255,0.25);
  color:var(--hub-muted);
  font-size:0.7rem;
  cursor:help;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
  line-height:1;
}

.hub-card__tooltip-trigger:hover{
  background:rgba(255,255,255,0.25);
  border-color:rgba(255,255,255,0.35);
  color:#fff;
}

.hub-card__tooltip{
  position:absolute;
  bottom:calc(100% + 8px);
  left:50%;
  transform:translateX(-50%);
  background:rgba(0,0,0,0.95);
  color:#fff;
  padding:0.75rem 1rem;
  border-radius:8px;
  font-size:0.85rem;
  line-height:1.5;
  white-space:normal;
  width:max(200px, min(280px, 30vw));
  max-width:90vw;
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;
  transform:translateX(-50%) translateY(4px);
  z-index:10;
  box-shadow:0 4px 12px rgba(0,0,0,0.3);
}

.hub-card__tooltip::after{
  content:'';
  position:absolute;
  top:100%;
  left:50%;
  transform:translateX(-50%);
  border:6px solid transparent;
  border-top-color:rgba(0,0,0,0.95);
}

.hub-card__tooltip-wrapper:hover .hub-card__tooltip{
  opacity:1;
  transform:translateX(-50%) translateY(0);
  pointer-events:auto;
}

.hub-card__badge{
  position:absolute;
  top:1rem;
  right:1rem;
  font-size:0.75rem;
  padding:0.35rem 0.75rem;
  background:rgba(93,220,255,0.15);
  border:1px solid rgba(93,220,255,0.3);
  border-radius:6px;
  color:rgba(93,220,255,1);
  text-transform:uppercase;
  letter-spacing:0.05em;
  font-weight:600;
}

/* responsive */
@media (max-width:860px){
  .hub-wrap{ padding:7rem 1.25rem 5rem; }
  .hub-hero{ margin-bottom:2rem; }
  .hub-section{ margin:3rem 0; }
}