body.is-messenger-overlay-open {
  overflow: hidden;
}

.messenger-launcher {
  position: fixed;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(var(--messenger-footer-offset, 22px), env(safe-area-inset-bottom));
  z-index: 1100;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(147, 197, 253, 0.42);
  border-radius: 999px;
  background: linear-gradient(145deg, #0a7cff, #0064e0);
  color: #fff;
  box-shadow:
    0 18px 46px rgba(0, 100, 224, 0.34),
    0 0 0 6px rgba(37, 99, 235, 0.08);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.messenger-launcher:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow:
    0 22px 54px rgba(0, 100, 224, 0.42),
    0 0 0 7px rgba(37, 99, 235, 0.1);
}

.messenger-launcher svg {
  width: 30px;
  height: 30px;
}

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

.messenger-overlay {
  position: fixed;
  inset: 0;
  z-index: 1440;
  display: grid;
  place-items: end;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.messenger-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.messenger-backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: rgba(1, 4, 12, 0.7);
  backdrop-filter: blur(8px);
}

.messenger-panel {
  position: relative;
  width: min(390px, calc(100vw - 48px));
  overflow: hidden;
  border: 1px solid rgba(96, 165, 250, 0.26);
  border-radius: 26px;
  background:
    radial-gradient(circle at 88% 0%, rgba(37, 99, 235, 0.24), transparent 16rem),
    linear-gradient(160deg, rgba(15, 23, 42, 0.98), rgba(5, 8, 18, 0.99));
  color: var(--text);
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.62);
  transform: translateY(18px) scale(0.98);
  transition: transform 0.18s ease;
}

.messenger-overlay.is-open .messenger-panel {
  transform: translateY(0) scale(1);
}

.messenger-panel::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, #60a5fa, #2563eb, #a855f7);
  content: '';
}

.messenger-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.66);
  color: #cbd5e1;
  transition: border-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.messenger-close:hover {
  border-color: rgba(96, 165, 250, 0.46);
  color: #fff;
  transform: rotate(4deg);
}

.messenger-close svg {
  width: 18px;
  height: 18px;
}

.messenger-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 28px 62px 20px 24px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.messenger-page-logo {
  position: relative;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(96, 165, 250, 0.28);
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.82);
  box-shadow: 0 14px 34px rgba(37, 99, 235, 0.18);
}

.messenger-page-logo img {
  width: 42px;
  height: 42px;
}

.messenger-status-dot {
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 14px;
  height: 14px;
  border: 3px solid #0b1120;
  border-radius: 999px;
  background: #34d399;
  box-shadow: 0 0 14px rgba(52, 211, 153, 0.76);
}

.messenger-header-copy {
  min-width: 0;
}

.messenger-header-copy strong {
  display: block;
  margin-bottom: 3px;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
}

.messenger-header-copy span {
  display: block;
  color: #9fb0c9;
  font-size: 0.78rem;
  line-height: 1.45;
}

.messenger-content {
  padding: 22px 24px 24px;
}

.messenger-content h2 {
  margin: 0;
  font-size: 1.38rem;
  line-height: 1.2;
}

.messenger-content > p {
  margin: 8px 0 18px;
  color: #9fb0c9;
  font-size: 0.9rem;
}

.messenger-topic-list {
  display: grid;
  gap: 9px;
  margin-bottom: 18px;
}

.messenger-topic {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 54px;
  padding: 8px 12px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.58);
  color: #e5edf9;
  text-align: left;
  transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.messenger-topic:hover,
.messenger-topic.is-selected {
  border-color: rgba(96, 165, 250, 0.48);
  background: rgba(37, 99, 235, 0.14);
  transform: translateX(2px);
}

.messenger-topic-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: rgba(96, 165, 250, 0.12);
  color: #93c5fd;
}

.messenger-topic-icon svg {
  width: 18px;
  height: 18px;
}

.messenger-topic-label {
  font-size: 0.9rem;
  font-weight: 800;
}

.messenger-topic-check {
  position: relative;
  display: block;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 999px;
  color: transparent;
  font-size: 0;
  line-height: 0;
}

.messenger-topic-check::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: '';
  opacity: 0;
  transform: translate(-50%, -58%) rotate(45deg);
}

.messenger-topic.is-selected .messenger-topic-check {
  border-color: #60a5fa;
  background: #2563eb;
  color: #fff;
}

.messenger-topic.is-selected .messenger-topic-check::after {
  opacity: 1;
}

.messenger-start {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  min-height: 50px;
  border: 1px solid rgba(147, 197, 253, 0.42);
  border-radius: 16px;
  background: linear-gradient(135deg, #0a7cff, #0064e0);
  color: #fff;
  font-size: 0.94rem;
  font-weight: 900;
  box-shadow: 0 18px 38px rgba(0, 100, 224, 0.24);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.messenger-start:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 46px rgba(0, 100, 224, 0.34);
}

.messenger-start svg {
  width: 22px;
  height: 22px;
}

@media (max-width: 640px) {
  .messenger-launcher {
    right: max(16px, env(safe-area-inset-right));
    bottom: max(var(--messenger-footer-offset, 16px), env(safe-area-inset-bottom));
    width: 54px;
    height: 54px;
  }

  .messenger-overlay {
    place-items: end center;
    padding: 12px;
  }

  .messenger-panel {
    width: 100%;
    border-radius: 24px;
  }

  .messenger-header {
    padding: 24px 58px 18px 20px;
  }

  .messenger-content {
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .messenger-launcher,
  .messenger-overlay,
  .messenger-panel,
  .messenger-topic,
  .messenger-start {
    transition: none;
  }
}