/* ============================================================================
   ВСПЛЫВАЮЩАЯ ПАНЕЛЬ (шит) — оплата, ввод username.
   ==========================================================================*/

.overlay-sheet {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  align-items: center;
  justify-items: center;
  padding: 24px;
  pointer-events: none;
}

.overlay-sheet[hidden] {
  display: none;
}

.overlay-sheet.is-open {
  pointer-events: auto;
}

.overlay-sheet__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.62);
  opacity: 0;
  backdrop-filter: blur(14px) saturate(0.9);
  -webkit-backdrop-filter: blur(14px) saturate(0.9);
  transition: opacity 280ms ease;
  will-change: opacity;
}

.overlay-sheet.is-open .overlay-sheet__backdrop {
  opacity: 1;
}

.overlay-sheet__panel {
  position: relative;
  width: min(100%, 430px);
  padding: 28px;
  border-radius: 40px;
  color: var(--text);
  background: var(--surface-overlay);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.10),
    inset 0 16px 26px rgba(255, 255, 255, 0.022),
    inset 0 -1px 0 rgba(0, 0, 0, 0.5),
    inset 0 -16px 26px rgba(0, 0, 0, 0.34),
    0 2px 0 rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 30px 70px rgba(0, 0, 0, 0.7);
  opacity: 0;
  text-align: center;
  transform: scale(0.92);
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), opacity 220ms ease;
}

.overlay-sheet.is-open .overlay-sheet__panel {
  opacity: 1;
  transform: scale(1);
}

/* Красная подсветка верхней кромки панели */
.overlay-sheet__panel::before {
  position: absolute;
  top: 0;
  left: 50%;
  width: 132px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  content: "";
  opacity: 0.75;
  transform: translateX(-50%);
}

.overlay-sheet__views {
  display: grid;
  overflow: visible;
  transition: height 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

.overlay-sheet__view {
  align-self: start;
  min-width: 0;
  grid-area: 1 / 1;
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1), opacity 220ms ease;
}

.overlay-sheet__view.is-entering {
  opacity: 0;
  transform: translateX(100%);
}

.overlay-sheet__view.is-leaving {
  opacity: 0;
  transform: translateX(-100%);
}

.overlay-sheet__title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.overlay-sheet__subtitle {
  margin-top: 9px;
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.overlay-sheet__content:empty {
  display: none;
}

.overlay-sheet__content:not(:empty) {
  margin-top: 22px;
}

body.overlay-sheet-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .overlay-sheet {
    align-items: end;
    padding: 0;
  }

  .overlay-sheet__panel {
    width: 100%;
    min-height: 184px;
    padding: 25px 20px max(30px, env(safe-area-inset-bottom));
    border-radius: 30px 30px 0 0;
    opacity: 1;
    transform: translateY(calc(100% + 24px));
    transition: transform 340ms cubic-bezier(0.22, 1, 0.36, 1);
    touch-action: none;
    will-change: transform;
  }

  /* Ручка для свайпа вниз */
  .overlay-sheet__panel::after {
    position: absolute;
    top: 9px;
    left: 50%;
    width: 42px;
    height: 4px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    content: "";
    transform: translateX(-50%);
  }

  .overlay-sheet.is-open .overlay-sheet__panel {
    transform: translateY(0);
  }

  .overlay-sheet.is-dragging .overlay-sheet__backdrop,
  .overlay-sheet.is-dragging .overlay-sheet__panel,
  .overlay-sheet.is-dragging .overlay-sheet__view {
    transition: none;
  }

  .overlay-sheet__title {
    font-size: 22px;
  }

  .overlay-sheet__subtitle {
    font-size: 15px;
  }
}