.pqn {
  --pqn-bg: #ffffff;
  --pqn-surface: #f4f8fb;
  --pqn-text: #143046;
  --pqn-border: #cdd9e3;
  --pqn-primary: #20ad96;
  --pqn-primary-strong: #1a8f7c;
  --pqn-shadow: 0 10px 30px rgba(10, 36, 54, 0.22);
  z-index: 99980;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

.pqn--neutral {
  --pqn-bg: #ffffff;
  --pqn-surface: #f5f5f5;
  --pqn-text: #1f2937;
  --pqn-border: #d1d5db;
  --pqn-primary: #20ad96;
  --pqn-primary-strong: #1a8f7c;
  --pqn-shadow: 0 10px 30px rgba(15, 23, 42, 0.2);
}

.pqn__overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 16, 24, 0.36);
  z-index: 99979;
}

.pqn__panel {
  position: fixed;
  left: 50%;
  bottom: 16px;
  width: min(calc(100vw - 24px), 420px);
  max-height: min(85vh, 680px);
  background: var(--pqn-bg);
  color: var(--pqn-text);
  border: 1px solid var(--pqn-border);
  border-radius: 18px;
  box-shadow: var(--pqn-shadow);
  overflow: hidden;
  z-index: 99981;
  transform: translate(-50%, calc(100% - 52px));
  display: flex;
  flex-direction: column;
}

.pqn.is-open .pqn__panel {
  transform: translate(-50%, 0);
}

.pqn__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--pqn-border);
  background: var(--pqn-primary);
  color: #fff;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  user-select: none;
  caret-color: transparent;
  text-align: center;
}

.pqn__toggle:hover,
.pqn__toggle:focus-visible {
  background: var(--pqn-primary-strong);
}

.pqn__toggle:focus-visible,
.pqn__link:focus-visible {
  outline: 2px solid #111;
  outline-offset: 2px;
}

.pqn__toggle-icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
}

.pqn__toggle-icon::before,
.pqn__toggle-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transform-origin: center;
}

.pqn__toggle-icon::before {
  transform: translate(-50%, -50%) rotate(0deg);
}

.pqn__toggle-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.pqn.is-open .pqn__toggle-icon::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.pqn.is-open .pqn__toggle-icon::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.pqn__nav {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  overflow: hidden;
  padding: 0 14px;
}

.pqn.is-open .pqn__nav {
  max-height: min(70vh, 620px);
  opacity: 1;
  pointer-events: auto;
  padding: 12px 14px 14px;
}

.pqn__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.pqn__link {
  display: grid;
  grid-template-columns: 24px 1fr;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  text-decoration: none;
  color: var(--pqn-text);
  border-radius: 12px;
  background: var(--pqn-surface);
  border: 1px solid var(--pqn-border);
  font-weight: 600;
}

.pqn__link:hover {
  border-color: var(--pqn-primary);
}

.pqn__icon {
  width: 24px;
  height: 24px;
  color: var(--pqn-primary);
}

.pqn__icon svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: currentColor;
}

@media (min-width: 768px) {
  .pqn__panel {
    left: auto;
    right: 0;
    top: 50%;
    bottom: auto;
    width: min(420px, calc(100vw - 24px));
    max-height: min(82vh, 720px);
    border-radius: 18px 0 0 18px;
    transform: translate(calc(100% - 64px), -50%);
    display: grid;
    grid-template-columns: 64px 1fr;
    align-items: stretch;
  }

  .pqn.is-open .pqn__panel {
    transform: translate(0, -50%);
  }

  .pqn__toggle {
    grid-column: 1;
    grid-row: 1;
    min-height: 100%;
    width: 64px;
    border-radius: 14px 0 0 14px;
    border-bottom: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.22);
    padding: 12px 8px;
    gap: 12px;
    flex-direction: column;
  }

  .pqn__toggle-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.02em;
    font-size: 1.02rem;
    transform: rotate(180deg);
  }

  .pqn__nav {
    grid-column: 2;
    grid-row: 1;
    max-height: none;
    opacity: 0;
    pointer-events: none;
    overflow: auto;
    padding: 14px;
  }

  .pqn.is-open .pqn__nav {
    opacity: 1;
    pointer-events: auto;
    padding: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pqn__panel,
  .pqn__nav,
  .pqn__toggle,
  .pqn__toggle-icon::before,
  .pqn__toggle-icon::after {
    transition: none !important;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .pqn__panel {
    transition: transform 0.24s ease;
  }

  .pqn__nav {
    transition: opacity 0.2s ease, max-height 0.24s ease, padding 0.2s ease;
  }

  .pqn__toggle {
    transition: background-color 0.2s ease;
  }

  .pqn__toggle-icon::before,
  .pqn__toggle-icon::after {
    transition: transform 0.2s ease;
  }
}