/* ============================================
   filter.css
   DRIVOID Clothing Filter Dropdown
   Condensed, popover-style filter menu
   ============================================ */

/* Delete if declared in a shared sheet — duplicate @keyframes
   of the same name resolve to last-declared, not merged. */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   FILTER BAR + ANCHOR
   The bar spans the content column; the anchor wraps only
   the trigger so the popover positions against the button
   rather than the far right edge of the section.
   ============================================ */

.filter-bar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1.5rem;
}

.filter-anchor {
  position: relative;
}

/* ============================================
   FILTER BUTTON TRIGGER
   ============================================ */

.filter-trigger {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;

  background: transparent;
  border: 1.5px solid var(--muted);
  color: var(--text);

  font-family: var(--font-body);
  font-size: inherit;
  font-weight: 600;
  letter-spacing: 0.5px;

  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  text-transform: uppercase;

  transition: all 0.2s ease;
  outline: none;
}

.filter-trigger:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.filter-trigger:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* --- SIGNAL VARIANT --- */

.filter-trigger--signal {
  border-color: var(--signal);
  color: var(--signal);
}

.filter-trigger--signal:hover {
  background: var(--signal);
  color: var(--void);

  box-shadow:
    0 0 15px var(--signal),
    inset 0 0 10px rgba(255, 255, 255, 0.2);

  transform: translateY(-2px);

  background-image: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.15),
    rgba(0, 0, 0, 0.15) 1px,
    transparent 1px,
    transparent 2px
  );
  background-size: 100% 2px;
}

.filter-trigger--signal:active {
  transform: translateY(0);
}

.filter-trigger--signal[aria-expanded="true"] {
  background: var(--signal);
  color: var(--void);
  border-color: var(--signal);

  box-shadow:
    0 0 20px var(--signal),
    inset 0 0 15px rgba(255, 255, 255, 0.3);

  animation: signal-breathe 2s ease-in-out infinite;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.1),
    rgba(0, 0, 0, 0.1) 1px,
    transparent 1px,
    transparent 2px
  );
  background-size: 100% 2px;
}

/* --- ICON ROTATION --- */

.filter-icon {
  display: inline-flex;
  align-items: center;
  font-size: 0.7em;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  opacity: 0.8;
}

.filter-trigger[aria-expanded="true"] .filter-icon {
  transform: rotate(180deg);
  opacity: 1;
}

/* ============================================
   FILTER POPOVER CONTAINER
   ============================================ */

.filter-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;

  width: 320px;
  max-width: calc(100vw - 2rem);
  max-height: min(70vh, 32rem);

  background: var(--surface);
  border: 1.5px solid var(--signal);
  border-radius: 0;

  box-shadow:
    0 12px 48px rgba(0, 0, 0, 0.9),
    inset 0 0 20px color-mix(in srgb, var(--signal) 5%, transparent);

  z-index: 20;
  animation: slideDown 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* auto, not hidden: focus outlines on the first and last
     controls sit outside the padding box and must not clip */
  overflow-y: auto;
}

/* ============================================
   FILTER FORM STRUCTURE
   ============================================ */

.filter-form {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 1rem;
}

.filter-fieldset {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0;
  padding: 0.75rem 0;
  border: none;
  border-bottom: 1px solid var(--border);
}

/* last-of-type, not last-child: .filter-actions is the form's
   final child, so :last-child never matched a fieldset. */
.filter-fieldset:last-of-type {
  border-bottom: none;
}

.filter-legend {
  margin: 0;
  padding: 0;

  color: var(--muted);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;

  user-select: none;
}

/* ============================================
   CHECKBOX LABELS & INPUTS
   The native input is visually hidden but remains in the
   accessibility tree and keyboard-focusable. The adjacent
   .filter-checkbox-visual span draws the box + checkmark,
   because ::before/::after do not apply to replaced
   elements such as <input>.
   ============================================ */

.filter-label {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;

  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 400;
  cursor: pointer;
  user-select: none;

  transition: color 0.2s ease;
  padding: 0.25rem 0;
}

.filter-label:hover {
  color: var(--text);
}

/* Pinned left so the hit area stays over the visual box at
   every breakpoint, including the 14px step at 480px. */
.filter-checkbox {
  position: absolute;
  left: 0;
  width: 16px;
  height: 16px;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.filter-checkbox-visual {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;

  width: 16px;
  height: 16px;

  background: transparent;
  border: 1.5px solid var(--signal);
  border-radius: 0;

  transition: all 0.2s ease;
}

.filter-label:hover .filter-checkbox-visual {
  box-shadow:
    0 0 8px var(--signal),
    inset 0 0 4px color-mix(in srgb, var(--signal) 20%, transparent);
}

.filter-checkbox:checked + .filter-checkbox-visual {
  background: var(--signal);
  border-color: var(--signal);

  box-shadow:
    0 0 12px var(--signal),
    inset 0 0 6px rgba(255, 255, 255, 0.3);
}

/* Checkmark */
.filter-checkbox:checked + .filter-checkbox-visual::after {
  content: '✓';

  color: var(--void);
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1;
}

.filter-checkbox:focus-visible + .filter-checkbox-visual {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* ============================================
   SORT SELECT DROPDOWN
   Matches booking form style
   ============================================ */

.filter-label--sort {
  margin-bottom: 0.5rem;
}

.filter-select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  padding-right: 2rem;

  background-color: var(--deep);
  border: 1.5px solid var(--signal);
  border-radius: 0;

  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.5px;

  cursor: pointer;
  user-select: none;
  outline: none;

  transition: all 0.2s ease;

  appearance: none;
  -webkit-appearance: none;

  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300ff00' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  background-size: 1.2em 1.2em;
}

.filter-select:hover {
  box-shadow:
    0 0 10px var(--signal),
    inset 0 0 6px color-mix(in srgb, var(--signal) 10%, transparent);
}

.filter-select:focus {
  box-shadow:
    0 0 15px var(--signal),
    inset 0 0 10px color-mix(in srgb, var(--signal) 15%, transparent);

  animation: signal-breathe 1.5s ease-in-out infinite;
}

.filter-select:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.filter-select option {
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  padding: 0.5rem;
}

.filter-select option:checked {
  background: var(--signal);
  color: var(--void);
  font-weight: 600;
}

/* ============================================
   FILTER ACTION BUTTONS
   Apply / Clear
   ============================================ */

.filter-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;

  padding: 0.75rem 0 0 0;
  border-top: 1px solid var(--border);
}

.filter-btn {
  flex: 1;
  padding: 0.6rem 0.75rem;

  background: transparent;
  border: 1.5px solid var(--muted);
  color: var(--muted);

  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;

  cursor: pointer;
  user-select: none;

  transition: all 0.2s ease;
  outline: none;

  border-radius: 0;
}

.filter-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.filter-btn:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* --- APPLY BUTTON (Signal Green) --- */

.filter-btn--apply {
  border-color: var(--signal);
  color: var(--signal);
}

.filter-btn--apply:hover {
  background: var(--signal);
  color: var(--void);
  border-color: var(--signal);

  box-shadow:
    0 0 12px var(--signal),
    inset 0 0 8px rgba(255, 255, 255, 0.2);

  transform: translateY(-1px);

  background-image: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.15),
    rgba(0, 0, 0, 0.15) 1px,
    transparent 1px,
    transparent 2px
  );
  background-size: 100% 2px;
}

.filter-btn--apply:active {
  transform: translateY(0);
}

/* --- CLEAR BUTTON (Gray) --- */

.filter-btn--clear {
  border-color: var(--dim);
  color: var(--dim);
}

.filter-btn--clear:hover {
  background: var(--dim);
  color: var(--surface);
  border-color: var(--dim);

  box-shadow: 0 0 10px rgba(153, 153, 153, 0.4);

  transform: translateY(-1px);
}

.filter-btn--clear:active {
  transform: translateY(0);
}

/* ============================================
   ACTIVE FILTER COUNT BADGE
   Lives inside the trigger, so it must invert whenever the
   trigger fills with signal green — otherwise the count is
   green-on-green and vanishes exactly when the popover opens.
   ============================================ */

.filter-count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-width: 24px;
  height: 24px;
  padding: 0 0.5rem;

  background-color: var(--signal);
  color: var(--void);

  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;

  border-radius: 0;
  text-align: center;
  user-select: none;

  transition: all 0.2s ease;
}

.filter-trigger:hover .filter-count-badge,
.filter-trigger[aria-expanded="true"] .filter-count-badge {
  background-color: var(--void);
  color: var(--signal);
  box-shadow: inset 0 0 0 1px var(--signal);
}

/* ============================================
   CLOSE BUTTON (X icon)
   Top-right corner of popover
   ============================================ */

.filter-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;

  display: flex;
  align-items: center;
  justify-content: center;

  width: 32px;
  height: 32px;

  background: transparent;
  border: none;
  color: var(--muted);

  font-size: 1.5rem;
  cursor: pointer;
  user-select: none;

  transition: all 0.2s ease;
  outline: none;

  padding: 0;
}

/* text-shadow, not box-shadow: the button is transparent and
   square, so a box glow renders as a floating green rectangle. */
.filter-close:hover {
  color: var(--signal);
  text-shadow: 0 0 12px var(--signal);
}

.filter-close:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  .filter-popover {
    width: min(320px, calc(100vw - 2rem));
  }

  .filter-form {
    padding: 0.75rem;
  }

  .filter-fieldset {
    padding: 0.5rem 0;
  }

  .filter-select,
  .filter-btn {
    font-size: 0.85rem;
    padding: 0.5rem 0.6rem;
  }
}

@media (max-width: 480px) {
  .filter-trigger {
    padding: 0.6rem 0.75rem;
    font-size: 0.85rem;
  }

  .filter-popover {
    width: min(320px, calc(100vw - 1rem));
  }

  .filter-form {
    padding: 0.6rem;
  }

  .filter-checkbox,
  .filter-checkbox-visual {
    width: 14px;
    height: 14px;
  }

  .filter-label {
    font-size: 0.85rem;
  }

  .filter-legend {
    font-size: 0.7rem;
  }

  .filter-select,
  .filter-btn {
    font-size: 0.8rem;
    padding: 0.5rem;
  }
}

/* ============================================
   ACCESSIBILITY
   Motion is suppressed; box-shadow is deliberately NOT reset
   here — the checked-checkbox glow is a state indicator, not
   decoration, and removing it costs affordance.
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .filter-trigger:hover,
  .filter-trigger[aria-expanded="true"],
  .filter-popover,
  .filter-icon,
  .filter-checkbox-visual,
  .filter-checkbox:checked + .filter-checkbox-visual,
  .filter-btn:hover,
  .filter-btn--apply:hover,
  .filter-count-badge {
    animation: none !important;
    transition: none !important;
  }

  .filter-trigger:hover,
  .filter-btn:hover,
  .filter-trigger[aria-expanded="true"] .filter-icon {
    transform: none;
  }
}

@media (prefers-contrast: more) {
  .filter-trigger,
  .filter-checkbox-visual,
  .filter-select,
  .filter-btn {
    border-width: 2px;
  }
}