/* ============================================================
   LANDING — diptych hub layout
   ============================================================ */

/* ── Page entrance ── */
@keyframes panelReveal {
  from { opacity: 0; transform: scale(1.025); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes seamReveal {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Hub container ── */
.hub {
  display: flex;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
  position: relative;
}

/* ── Panels ── */
.panel {
  position: relative;
  flex-grow: 1;
  flex-shrink: 1;
  flex-basis: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: pointer;
  transition: flex-grow 0.8s var(--ease-expo);
}

@media (prefers-reduced-motion: no-preference) {
  .panel--sona {
    animation: panelReveal 1.1s var(--ease-expo) both;
  }
  .panel--jaroslav {
    animation: panelReveal 1.1s var(--ease-expo) 0.12s both;
  }

  /* Expand on hover / focus */
  .hub:has(.panel--sona:hover)        .panel--sona,
  .hub:has(.panel--sona:focus-within) .panel--sona  { flex-grow: 1.5; }
  .hub:has(.panel--sona:hover)        .panel--jaroslav,
  .hub:has(.panel--sona:focus-within) .panel--jaroslav { flex-grow: 0.5; }

  .hub:has(.panel--jaroslav:hover)        .panel--jaroslav,
  .hub:has(.panel--jaroslav:focus-within) .panel--jaroslav { flex-grow: 1.5; }
  .hub:has(.panel--jaroslav:hover)        .panel--sona,
  .hub:has(.panel--jaroslav:focus-within) .panel--sona { flex-grow: 0.5; }
}

.panel--sona     { background-color: var(--sona-bg); }
.panel--jaroslav { background-color: var(--jaroslav-bg); }

/* Vignette overlay */
.panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 45%, rgba(0,0,0,0.07) 100%);
  pointer-events: none;
  z-index: 1;
}

/* ── Panel inner content ── */
.panel__content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-lg);
  gap: 1.25rem;
  /* shift away from center seam */
  max-width: 28rem;
}

.panel--sona     .panel__content { padding-right: calc(var(--space-lg) + 3rem); }
.panel--jaroslav .panel__content { padding-left:  calc(var(--space-lg) + 3rem); }

/* Label */
.panel__label {
  font-family: var(--font-body);
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.55;
  transition: opacity 0.4s ease;
}
.panel--sona     .panel__label { color: var(--sona-ink); }
.panel--jaroslav .panel__label { color: var(--jaroslav-accent-light); }

.panel:hover .panel__label { opacity: 0.85; }

/* Name */
.panel__name {
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 9vw, 9.5rem);
  font-weight: 300;
  font-style: italic;
  line-height: 0.88;
  letter-spacing: -0.01em;
  transition: letter-spacing 0.6s var(--ease-expo);
}
.panel--sona     .panel__name { color: var(--sona-ink); }
.panel--jaroslav .panel__name { color: var(--jaroslav-ink); }

@media (prefers-reduced-motion: no-preference) {
  .panel:hover .panel__name { letter-spacing: 0.015em; }
}

/* Tagline */
.panel__tagline {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 300;
  line-height: 2.1;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-expo);
}
.panel--sona     .panel__tagline { color: var(--sona-ink); }
.panel--jaroslav .panel__tagline { color: var(--jaroslav-accent-light); }

.panel:hover     .panel__tagline,
.panel:focus-within .panel__tagline { opacity: 1; transform: none; }

/* CTA */
.panel__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding-bottom: 3px;
  border-bottom: 1px solid currentColor;
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity   0.4s ease 0.08s,
    transform 0.4s var(--ease-expo) 0.08s,
    gap       0.3s var(--ease-out);
}
.panel--sona     .panel__cta { color: var(--sona-accent); }
.panel--jaroslav .panel__cta { color: var(--jaroslav-accent); }

.panel:hover     .panel__cta,
.panel:focus-within .panel__cta {
  opacity: 1;
  transform: none;
}
.panel:hover .panel__cta { gap: 0.85rem; }

/* ── Panel logo — mobile only (above name, floats at upper-mid panel) ── */
.panel__logo {
  display: none; /* desktop: hidden — logo lives in the seam */
}

.panel--sona     { color: var(--sona-ink); }
.panel--jaroslav { color: var(--jaroslav-ink); }

/* ── Center seam — with NUMA logo, mix-blend-mode for auto contrast ── */
.hub__seam {
  position: absolute;
  top: 0;
  left: 50%;
  height: 100%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 10;
  pointer-events: none;
  mix-blend-mode: difference;
}

@media (prefers-reduced-motion: no-preference) {
  .hub__seam {
    animation: seamReveal 1.4s ease 0.3s both;
  }
}

/* Hairline above logo — shorter flex pushes logo high (~18% from top) */
.hub__seam::before {
  content: '';
  width: 1px;
  flex: 0.15;
  background: linear-gradient(to bottom, transparent 0%, white 40%, white 100%);
}

/* Hairline below logo */
.hub__seam::after {
  content: '';
  width: 1px;
  flex: 1;
  background: linear-gradient(to bottom, white 0%, white 60%, transparent 100%);
}

/* Logo block — white mask + difference = always visible against both panels */
.hub__logo {
  padding: 0.9rem 1.75rem;
  flex-shrink: 0;
}

.hub__logo-inner {
  width: clamp(140px, 14vw, 220px);
  aspect-ratio: 2045 / 631;
  -webkit-mask: url('../assets/images/numa-logo.svg') no-repeat center / contain;
  mask: url('../assets/images/numa-logo.svg') no-repeat center / contain;
  background-color: white;
}

/* ── Mobile — peek & expand ── */
@media (max-width: 767px) {
  .hub {
    flex-direction: column;
  }

  .panel {
    flex-basis: 0;
    min-height: 0;
    overflow: hidden;
    transition: flex-grow 0.7s var(--ease-expo);
  }

  /* Default: Soňa featured (90%), Jaroslav peeks (10%) */
  .panel--sona     { flex-grow: 9; }
  .panel--jaroslav { flex-grow: 1; }

  /* Jaroslav active: flip */
  .hub.jaroslav-active .panel--sona     { flex-grow: 1; }
  .hub.jaroslav-active .panel--jaroslav { flex-grow: 9; }

  /* ── Expanded panel content ── */
  .panel--sona .panel__content,
  .panel--jaroslav .panel__content {
    padding: var(--space-lg) var(--space-md);
    gap: 0.85rem;
    justify-content: flex-end;
  }

  /* Expanded: always show tagline + CTA */
  .hub:not(.jaroslav-active) .panel--sona .panel__tagline,
  .hub:not(.jaroslav-active) .panel--sona .panel__cta,
  .hub.jaroslav-active .panel--jaroslav .panel__tagline,
  .hub.jaroslav-active .panel--jaroslav .panel__cta {
    opacity: 1;
    transform: none;
  }

  /* ── Peek strip content ── */
  .hub:not(.jaroslav-active) .panel--jaroslav .panel__content,
  .hub.jaroslav-active       .panel--sona     .panel__content {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-md);
    gap: 0.6rem;
  }

  /* Mobile: logo floats in the cleared upper zone of expanded panel */
  .panel__logo {
    display: block;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: clamp(90px, 40vw, 160px);
    aspect-ratio: 2045 / 631;
    -webkit-mask: url('../assets/images/numa-logo.svg') no-repeat center / contain;
    mask: url('../assets/images/numa-logo.svg') no-repeat center / contain;
    background-color: currentColor;
    opacity: 0.8;
    pointer-events: none;
  }

  /* Peek: hide tagline, CTA, and logo */
  .hub:not(.jaroslav-active) .panel--jaroslav .panel__tagline,
  .hub:not(.jaroslav-active) .panel--jaroslav .panel__cta,
  .hub:not(.jaroslav-active) .panel--jaroslav .panel__logo,
  .hub.jaroslav-active       .panel--sona     .panel__tagline,
  .hub.jaroslav-active       .panel--sona     .panel__cta,
  .hub.jaroslav-active       .panel--sona     .panel__logo {
    display: none;
  }

  /* Peek: shrink name to single inline strip */
  .hub:not(.jaroslav-active) .panel--jaroslav .panel__name,
  .hub.jaroslav-active       .panel--sona     .panel__name {
    font-size: 1.35rem;
    line-height: 1;
  }

  /* Peek: dim the label a touch */
  .hub:not(.jaroslav-active) .panel--jaroslav .panel__label,
  .hub.jaroslav-active       .panel--sona     .panel__label {
    font-size: 0.55rem;
    opacity: 0.5;
  }

  /* Hide seam on mobile — no seam to mark */
  .hub__seam {
    display: none;
  }
}