/* ============================================================
   INDEX.CSS — Стили главной страницы-хаба КЬЮНИТИ
============================================================ */

#comet-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.index-page {
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hub {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-4);
  overflow: hidden;
  text-align: center;
}

/* ---- Орбиты ---- */
.hub__orbits {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(11, 140, 158, 0.12);
}

.orbit--1 { width: 500px; height: 500px; animation: orbit-pulse 6s ease-in-out infinite; }
.orbit--2 { width: 750px; height: 750px; border-color: rgba(107, 70, 193, 0.08); animation: orbit-pulse 9s ease-in-out infinite reverse; }
.orbit--3 { width: 1050px; height: 1050px; border-color: rgba(11, 140, 158, 0.05); animation: orbit-pulse 12s ease-in-out infinite; }

@keyframes orbit-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1);   opacity: 1; }
  50%       { transform: translate(-50%, -50%) scale(1.04); opacity: 0.6; }
}

/* ---- Логотип ---- */
.hub__badge {
  position: relative;
  z-index: 1;
  opacity: 0;
  animation: fade-up 0.6s 0.1s ease-out forwards;
}

.hub__badge img {
  height: 66px;
  width: auto;
  margin-inline: auto;
}

/* ---- Центральный текст ---- */
.hub__intro {
  position: relative;
  z-index: 1;
  opacity: 0;
  animation: fade-up 0.6s 0.25s ease-out forwards;
}

.hub__title {
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 0.7rem + 0.75vw, 1.35rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.15;
  background: var(--gradient-brand-h);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.hub__sub {
  font-size: var(--text-xs);
  color: var(--color-text-60);
  max-width: 460px;
  margin-inline: auto;
  line-height: 1.5;
}

/* ---- Сетка карточек ---- */
.hub__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  width: 100%;
  max-width: 1100px;
  opacity: 0;
  animation: fade-up 0.6s 0.45s ease-out forwards;
}

/* ---- Карточка — полупрозрачная ---- */
.hub-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-4) var(--space-4);
  background: rgba(42, 42, 42, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xl);
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition:
    transform var(--transition-smooth),
    border-color var(--transition-smooth),
    box-shadow var(--transition-smooth),
    background var(--transition-smooth);
}

.hub-card:hover {
  transform: translateY(-6px);
  border-color: rgba(11, 140, 158, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(11, 140, 158, 0.15);
  background: rgba(45, 45, 45, 0.75);
}

/* Цветной верхний бордер */
.hub-card::before {
  content: '';
  display: block;
  height: 2px;
  width: 32px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-1);
  transition: width var(--transition-smooth);
}

.hub-card:hover::before { width: 80%; }

.hub-card--speakers::before   { background: var(--color-teal); }
.hub-card--organizers::before { background: var(--color-purple); }
.hub-card--leaders::before    { background: linear-gradient(90deg, var(--color-teal), var(--color-purple)); }
.hub-card--directors::before  { background: var(--color-purple-light); }

/* ---- Иконка ---- */
.hub-card__icon {
  color: var(--color-text-40);
  transition: color var(--transition-fast);
}

.hub-card:hover .hub-card__icon { color: var(--color-teal); }

/* ---- Текст ---- */
.hub-card__label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-40);
  margin-bottom: 2px;
  transition: color var(--transition-fast);
}

.hub-card:hover .hub-card__label { color: var(--color-teal); }

.hub-card__name {
  font-family: var(--font-display);
  font-size: clamp(0.8rem, 0.75rem + 0.25vw, 0.95rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text);
  line-height: 1.25;
  margin-bottom: var(--space-1);
}

.hub-card__desc {
  font-size: 0.7rem;
  color: var(--color-text-60);
  line-height: 1.45;
  flex: 1;
}

/* ---- Стрелка перехода ---- */
.hub-card__arrow {
  font-size: var(--text-lg);
  color: var(--color-teal);
  opacity: 0;
  transform: translateX(-8px);
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast);
  align-self: flex-end;
  margin-top: auto;
}

.hub-card:hover .hub-card__arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ---- Нижняя подпись ---- */
.hub__footnote {
  position: relative;
  z-index: 1;
  font-size: var(--text-xs);
  color: var(--color-text-40);
  letter-spacing: 0.05em;
  opacity: 0;
  animation: fade-up 0.6s 0.65s ease-out forwards;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Адаптив ---- */
@media (max-width: 1023px) {
  .hub__grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}

@media (max-width: 600px) {
  .hub__grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .orbit--1 { width: 300px; height: 300px; }
  .orbit--2 { width: 450px; height: 450px; }
  .orbit--3 { width: 600px; height: 600px; }
  .hub__title { font-size: 0.85rem; }
}

@media (prefers-reduced-motion: reduce) {
  .orbit, .hub__badge, .hub__intro, .hub__grid, .hub__footnote {
    animation: none;
    opacity: 1;
  }
  #comet-canvas { display: none; }
}