/**
 * AlgoPaca - Desktop Shell & Navigation Styles (>= 769px)
 * Loaded exclusively on desktop viewports for high-performance responsive delivery.
 */

@media (min-width: 769px) {
  .desk-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.2rem;
    padding: 0.3rem;
    min-width: 0;
    position: relative;
    z-index: 2;
    overflow: visible;
    border: 1px solid var(--line);
    border-radius: calc(var(--radius-md) + 0.3rem);
    background: color-mix(in srgb, var(--panel) 85%, transparent);
    box-shadow:
      inset 0 1px 0 var(--line-soft),
      var(--shadow-sm);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .desk-nav-group {
    position: relative;
    display: flex;
  }

  .desk-nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    text-decoration: none;
    white-space: nowrap;
    color: var(--muted);
    padding: 0.5rem 0.8rem;
    border-radius: var(--radius-md);
    transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  }

  .desk-nav-link:hover {
    color: var(--text);
    background: var(--surface-soft);
  }

  .desk-nav-link.is-active {
    color: var(--copper);
    font-weight: 600;
    background: color-mix(in srgb, var(--copper) 14%, transparent);
    box-shadow:
      inset 0 0 0 1px color-mix(in srgb, var(--copper) 25%, transparent),
      0 2px 8px color-mix(in srgb, var(--copper) 12%, transparent);
  }

  .desk-nav-link.is-active:hover {
    color: var(--copper);
    background: color-mix(in srgb, var(--copper) 20%, transparent);
    box-shadow:
      inset 0 0 0 1px color-mix(in srgb, var(--copper) 35%, transparent),
      0 2px 10px color-mix(in srgb, var(--copper) 16%, transparent);
  }

  /* ── Desk nav dropdowns ────────────────────────────────────────── */
  .desk-nav-trigger {
    border: 0;
    margin: 0;
    cursor: pointer;
    background: none;
    font: inherit;
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.09em;
    text-transform: uppercase;
  }

  .desk-nav-trigger::after {
    content: "";
    flex: none;
    width: 0;
    height: 0;
    border-left: 3.5px solid transparent;
    border-right: 3.5px solid transparent;
    border-top: 4px solid currentColor;
    opacity: 0.75;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .desk-nav-trigger:hover::after,
  .desk-nav-trigger[aria-expanded="true"]::after {
    opacity: 1;
  }

  .desk-nav-trigger[aria-expanded="true"] {
    color: var(--text);
    background: var(--surface-soft);
  }

  .desk-nav-trigger[aria-expanded="true"]::after {
    transform: rotate(180deg);
  }

  .desk-nav-trigger.is-active[aria-expanded="true"] {
    color: var(--copper);
    background: color-mix(in srgb, var(--copper) 20%, transparent);
    box-shadow:
      inset 0 0 0 1px color-mix(in srgb, var(--copper) 35%, transparent),
      0 2px 10px color-mix(in srgb, var(--copper) 16%, transparent);
  }

  .desk-menu {
    position: absolute;
    top: calc(100% + 0.55rem);
    left: 0;
    z-index: 30;
    display: grid;
    gap: 0.15rem;
    min-width: 12rem;
    max-width: calc(100vw - 1.5rem);
    padding: 0.4rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--panel);
    box-shadow:
      inset 0 1px 0 var(--line-soft),
      var(--shadow-md);
    animation: menu-in 0.16s ease both;
  }

  .desk-menu[hidden] {
    display: none;
  }

  .desk-menu.is-flipped {
    left: auto;
    right: 0;
  }

  .desk-menu::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -0.55rem;
    height: 0.55rem;
  }

  @keyframes menu-in {
    from {
      opacity: 0;
      transform: translateY(-0.3rem);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }

  .desk-menu-link {
    display: block;
    padding: 0.5rem 0.7rem;
    border-radius: var(--radius-sm);
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.05em;
    text-decoration: none;
    white-space: nowrap;
    color: var(--muted);
    transition: color 0.15s ease, background 0.15s ease;
  }

  .desk-menu-link:hover,
  .desk-menu-link:focus-visible {
    color: var(--text);
    background: var(--surface-soft);
  }

  .desk-menu-link.is-active {
    color: var(--copper);
    background: color-mix(in srgb, var(--copper) 12%, transparent);
  }

  .desk-menu-link:focus-visible {
    outline: 2px solid var(--copper);
    outline-offset: -2px;
  }

  .desk-nav-link:focus-visible {
    outline: 2px solid var(--copper);
    outline-offset: 2px;
  }
}

/* ── Desktop Date Picker Popover ─────────────────────────────────── */
.date-picker {
  position: fixed;
  z-index: 40;
  width: 18.75rem;
  padding: 0.7rem 0.7rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  box-shadow:
    inset 0 1px 0 var(--line-soft),
    var(--shadow-md);
  animation: date-picker-in 160ms ease both;
}

.date-picker[hidden] {
  display: none;
}

@keyframes date-picker-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.date-picker-head {
  display: grid;
  grid-template-columns: 2.25rem 1fr 2.25rem;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 0.55rem;
}

.date-picker-month {
  margin: 0;
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 500;
  font-optical-sizing: auto;
  text-align: center;
  letter-spacing: 0.01em;
  color: var(--text);
}

.date-picker-nav {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  min-height: 2.25rem;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  transform: none;
}

.date-picker-nav:hover,
.date-picker-nav:focus-visible,
button.date-picker-nav:hover:not(:disabled) {
  transform: none;
  color: var(--copper);
  border-color: color-mix(in srgb, var(--copper) 40%, var(--line));
  background: color-mix(in srgb, var(--copper) 10%, transparent);
}

.date-picker-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  margin-bottom: 0.25rem;
}

.date-picker-weekday {
  padding: 0.2rem 0;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: center;
  color: var(--muted);
}

.date-picker-weekday.is-weekend {
  color: color-mix(in srgb, var(--muted) 70%, var(--line));
}

.date-picker-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.12rem;
}

.date-picker-day {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 2.15rem;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  transform: none;
}

.date-picker-day:hover,
.date-picker-day:focus-visible,
button.date-picker-day:hover:not(:disabled) {
  transform: none;
  background: color-mix(in srgb, var(--copper) 16%, transparent);
  color: var(--text);
}

.date-picker-day.is-outside {
  color: var(--muted);
  opacity: 0.4;
}

.date-picker-day.is-weekend:not(.is-selected):not(:hover) {
  color: var(--muted);
}

.date-picker-day.is-disabled,
.date-picker-day:disabled {
  color: var(--muted);
  opacity: 0.32;
  cursor: not-allowed;
  pointer-events: none;
}

.date-picker-day.is-in-range {
  border-radius: 0;
  background: color-mix(in srgb, var(--copper) 12%, transparent);
}

.date-picker-day.is-range-start {
  border-radius: 999px 0 0 999px;
}

.date-picker-day.is-range-end {
  border-radius: 0 999px 999px 0;
}

.date-picker-day.is-selected,
.date-picker-day.is-range-start.is-range-end {
  border-radius: 999px;
  background: var(--copper);
  color: var(--copper-text, #0c1219);
  font-weight: 600;
}

.date-picker-day.is-selected.is-range-start:not(.is-range-end) {
  border-radius: 999px 0 0 999px;
}

.date-picker-day.is-selected.is-range-end:not(.is-range-start) {
  border-radius: 0 999px 999px 0;
}

.date-picker-day.is-selected:hover,
.date-picker-day.is-selected:focus-visible {
  background: var(--copper-deep);
  color: var(--copper-text, #0c1219);
}

.date-picker-day.is-today:not(.is-selected)::after {
  content: "";
  position: absolute;
  bottom: 0.22rem;
  left: 50%;
  width: 0.28rem;
  height: 0.28rem;
  transform: translateX(-50%) rotate(45deg);
  background: var(--copper);
}

.date-picker-foot {
  display: flex;
  justify-content: center;
  margin-top: 0.55rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--line);
}

.date-picker-today {
  min-height: 2rem;
  padding: 0.25rem 0.7rem;
  border: 0;
  background: transparent;
  color: var(--copper);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: none;
}

.date-picker-today:hover,
.date-picker-today:focus-visible,
button.date-picker-today:hover:not(:disabled) {
  transform: none;
  color: var(--text);
}

@media (prefers-reduced-motion: reduce) {
  .date-picker {
    animation: none;
  }
}