/* =====================================================================
   CUSTOM SELECT
   Progressive enhancement of native <select> — swaps the OS/browser
   picker sheet for a themed dropdown that matches the panel UI.
   ===================================================================== */
.cs{
  position: relative;
  min-width: 160px;
}
.cs__native{
  /* keep in DOM for form semantics + fallback, hide visually */
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  opacity: 0; pointer-events: none;
}

.cs__trigger{
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-2);
  font-family: inherit;
  padding: 10px 13px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  font-size: 13.5px;
  cursor: pointer;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.cs__trigger:hover{ border-color: var(--border-strong); }
.cs__trigger .icon{
  color: var(--muted);
  transition: transform var(--dur-fast) var(--ease-out);
}
.cs.is-open .cs__trigger{
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-wash);
}
.cs.is-open .cs__trigger .icon{ transform: rotate(180deg); }

.cs__value{
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.cs__value[data-empty="true"]{ color: var(--faint); }

/* ---------- backdrop (mobile bottom sheet) ---------- */
.cs__backdrop{
  position: fixed; inset: 0;
  background: rgba(4,5,7,.7);
  z-index: var(--z-modal);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-out);
}
.cs.is-open .cs__backdrop{ opacity: 1; pointer-events: auto; }

/* ---------- panel ---------- */
.cs__panel{
  list-style: none; margin: 0; padding: 6px;
  background: var(--surface-raised);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-modal);
  z-index: var(--z-modal);
  overflow-y: auto;
}

.cs__option{
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3);
  padding: 13px 14px;
  border-radius: var(--r-sm);
  font-size: 14.5px; font-weight: 600; color: var(--ink);
  cursor: pointer;
  transition: background var(--dur-fast);
}
.cs__option:hover, .cs__option:focus-visible{ background: var(--surface-sunken); outline: none; }
.cs__option[aria-selected="true"]{ color: var(--accent); }

.cs__dot{
  width: 8px; height: 8px; border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.cs__radio{
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid var(--border-strong);
  flex-shrink: 0;
  display: grid; place-items: center;
  transition: border-color var(--dur-fast);
}
.cs__option[aria-selected="true"] .cs__radio{
  border-color: var(--accent);
}
.cs__radio::after{
  content: '';
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  transform: scale(0);
  transition: transform var(--dur-fast) var(--ease-out);
}
.cs__option[aria-selected="true"] .cs__radio::after{ transform: scale(1); }

/* ---------- mobile: bottom sheet ---------- */
@media (max-width: 719px){
  .cs__panel{
    position: fixed;
    left: 0; right: 0; bottom: 0;
    max-height: 70vh;
    border-radius: var(--r-lg) var(--r-lg) 0 0;
    border-bottom: none;
    padding: 10px 10px calc(10px + env(safe-area-inset-bottom, 0px));
    transform: translateY(100%);
    transition: transform var(--dur-med) var(--ease-out);
  }
  .cs.is-open .cs__panel{ transform: translateY(0); }
  .cs__panel::before{
    content: '';
    display: block;
    width: 36px; height: 4px;
    margin: 4px auto 10px;
    border-radius: var(--r-full);
    background: var(--border-strong);
  }
  .cs__option{ padding: 15px 14px; }
}

/* ---------- desktop/tablet: anchored popover ---------- */
@media (min-width: 720px){
  .cs__panel{
    position: absolute;
    top: calc(100% + 6px); left: 0;
    min-width: 100%; width: max-content; max-width: 280px;
    max-height: 320px;
    border-radius: var(--r-md);
    opacity: 0; visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility 0s var(--dur-fast);
  }
  .cs.is-open .cs__panel{
    opacity: 1; visibility: visible;
    transform: translateY(0);
    transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility 0s;
  }
  .cs__backdrop{ background: transparent; }
}