/* ==========================================================================
   COMPONENTS.CSS — Buttons, Forms, Cards, Badges, Toasts
   toilet-cubicle.co.uk
   ========================================================================== */

/* =========================================================================
   BUTTONS
   ========================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  min-height: 44px; /* Touch-friendly minimum */
  padding: 0.625rem 1.5rem; /* 10px 24px */
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1.4;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  user-select: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  position: relative;
  overflow: hidden;
}

/* Ripple / shimmer effect on hover */
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255, 255, 255, 0.12) 45%,
    rgba(255, 255, 255, 0.12) 55%,
    transparent 60%
  );
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.btn:hover::after {
  transform: translateX(100%);
}

.btn:active {
  transform: translateY(1px);
}

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

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* -- Primary (Green) ------------------------------------------------------ */

.btn--primary {
  background-color: var(--color-green);
  color: var(--color-white);
  border-color: var(--color-green);
}

.btn--primary:hover {
  background-color: var(--color-green-dark);
  border-color: var(--color-green-dark);
  box-shadow: var(--shadow-green);
}

.btn--primary:active {
  background-color: #1a7a42;
}

/* -- Secondary (Charcoal) ------------------------------------------------- */

.btn--secondary {
  background-color: var(--color-charcoal);
  color: var(--color-white);
  border-color: var(--color-charcoal);
}

.btn--secondary:hover {
  background-color: var(--color-charcoal-light);
  border-color: var(--color-charcoal-light);
  box-shadow: var(--shadow-md);
}

.btn--secondary:active {
  background-color: var(--color-charcoal-dark);
}

/* -- Outline (Green border) ----------------------------------------------- */

.btn--outline {
  background-color: transparent;
  color: var(--color-green);
  border-color: var(--color-green);
}

.btn--outline:hover {
  background-color: var(--color-green);
  color: var(--color-white);
  box-shadow: var(--shadow-green);
}

.btn--outline:active {
  background-color: var(--color-green-dark);
  border-color: var(--color-green-dark);
}

/* -- Ghost (no border, subtle hover) -------------------------------------- */

.btn--ghost {
  background-color: transparent;
  color: var(--color-grey-600);
  border-color: transparent;
  text-transform: none;
  letter-spacing: var(--tracking-normal);
  font-weight: var(--weight-medium);
}

.btn--ghost:hover {
  background-color: var(--color-grey-100);
  color: var(--color-grey-900);
}

.btn--ghost::after {
  display: none;
}

/* -- Sizes ---------------------------------------------------------------- */

.btn--sm {
  min-height: 36px;
  padding: 0.375rem 1rem;
  font-size: var(--text-xs);
}

.btn--lg {
  min-height: 52px;
  padding: 0.75rem 2rem;
  font-size: var(--text-base);
}

.btn--block {
  display: flex;
  width: 100%;
}

/* -- Icon button ---------------------------------------------------------- */

.btn--icon {
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
}

.btn__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* =========================================================================
   BADGE — Cart counter, notification dot
   ========================================================================= */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  font-size: 0.6875rem; /* 11px */
  font-weight: var(--weight-bold);
  line-height: 1;
  color: var(--color-white);
  background-color: var(--color-green);
  border-radius: var(--radius-full);
  /* Subtle pop animation when value changes — toggled via JS */
  animation: none;
}

.badge--pulse {
  animation: badge-pulse 0.3s var(--ease-spring);
}

@keyframes badge-pulse {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.3); }
  100% { transform: scale(1); }
}

.badge:empty {
  display: none;
}

/* =========================================================================
   FORMS
   ========================================================================= */

/* -- Form Group ----------------------------------------------------------- */

.form-group {
  margin-bottom: var(--sp-3);
}

.form-group:last-child {
  margin-bottom: 0;
}

/* -- Labels --------------------------------------------------------------- */

label,
.form-label {
  display: block;
  margin-bottom: 6px;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-grey-900);
}

.form-label--required::after {
  content: " *";
  color: var(--color-red);
}

.form-hint {
  display: block;
  margin-top: 4px;
  font-size: var(--text-xs);
  color: var(--color-grey-600);
}

/* -- Inputs, Selects, Textareas ------------------------------------------- */

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="search"],
input[type="url"],
input[type="password"],
select,
textarea,
.form-input {
  display: block;
  width: 100%;
  height: 48px;
  padding: 0.625rem 0.875rem;
  font-size: var(--text-base);
  font-family: var(--font-body);
  color: var(--color-grey-900);
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-grey-300);
  border-radius: var(--radius);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

textarea {
  height: auto;
  min-height: 120px;
  line-height: var(--leading-normal);
}

/* Placeholder */
input::placeholder,
textarea::placeholder {
  color: var(--color-grey-400);
}

/* Hover */
input[type="text"]:hover,
input[type="email"]:hover,
input[type="tel"]:hover,
input[type="number"]:hover,
select:hover,
textarea:hover,
.form-input:hover {
  border-color: var(--color-grey-600);
}

/* Focus */
input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus,
input[type="search"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus,
.form-input:focus {
  outline: none;
  border-color: var(--color-green);
  box-shadow: 0 0 0 3px var(--color-green-muted);
}

/* Custom select arrow */
select {
  padding-right: 2.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%236B7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  background-size: 12px;
  cursor: pointer;
}

/* -- Input with Unit (e.g. mm) -------------------------------------------- */

.input-with-unit {
  position: relative;
  display: flex;
  align-items: stretch;
}

.input-with-unit input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: none;
  flex: 1;
}

.input-with-unit__suffix {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.875rem;
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  font-weight: var(--weight-medium);
  color: var(--color-grey-600);
  background-color: var(--color-grey-100);
  border: var(--border-width) solid var(--color-grey-300);
  border-left: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  user-select: none;
}

.input-with-unit input:focus ~ .input-with-unit__suffix {
  border-color: var(--color-green);
}

/* -- Checkbox & Radio ----------------------------------------------------- */

input[type="checkbox"],
input[type="radio"] {
  width: 20px;
  height: 20px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--color-green);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-1);
}

.form-check label {
  margin-bottom: 0;
  cursor: pointer;
}

/* -- Swatch Grid (colour picker radio buttons) ---------------------------- */

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
  gap: var(--sp-1);
}

.swatch-grid__item {
  position: relative;
}

.swatch-grid__item input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.swatch-grid__colour {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-grey-200);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  /* The actual colour is set via inline style="background-color: ..." */
}

.swatch-grid__colour:hover {
  border-color: var(--color-grey-600);
  transform: scale(1.08);
}

.swatch-grid__item input[type="radio"]:checked + .swatch-grid__colour {
  border-color: var(--color-green);
  box-shadow: 0 0 0 3px var(--color-green-muted);
}

/* Checkmark overlay on selected swatch */
.swatch-grid__item input[type="radio"]:checked + .swatch-grid__colour::after {
  content: "";
  display: block;
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none'%3E%3Cpath d='M3 8.5l3.5 3.5L13 4' stroke='%23fff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: contain;
  /* Drop shadow on the checkmark so it's visible on light colours */
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
}

.swatch-grid__item input[type="radio"]:focus-visible + .swatch-grid__colour {
  outline: 2px solid var(--color-green);
  outline-offset: 2px;
}

.swatch-grid__label {
  display: block;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-grey-600);
  margin-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* -- Form Error ----------------------------------------------------------- */

.form-error {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  font-size: var(--text-xs);
  color: var(--color-red);
  line-height: var(--leading-snug);
}

.form-error::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='none'%3E%3Ccircle cx='7' cy='7' r='6' stroke='%23E74C3C' stroke-width='1.5'/%3E%3Cpath d='M7 4v3.5M7 9.5h.01' stroke='%23E74C3C' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
}

/* Error state on inputs */
.form-group--error input,
.form-group--error select,
.form-group--error textarea {
  border-color: var(--color-red);
}

.form-group--error input:focus,
.form-group--error select:focus,
.form-group--error textarea:focus {
  box-shadow: 0 0 0 3px var(--color-red-light);
  border-color: var(--color-red);
}

/* =========================================================================
   CARD — General purpose card component
   ========================================================================= */

.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card--interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card__body {
  padding: var(--sp-3);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  margin-bottom: var(--sp-1);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--color-grey-600);
  line-height: var(--leading-normal);
}

.card__footer {
  padding: var(--sp-2) var(--sp-3);
  border-top: 1px solid var(--color-grey-100);
}

/* =========================================================================
   TOAST — Fixed notification card
   ========================================================================= */

.toast-container {
  position: fixed;
  bottom: var(--sp-3);
  right: var(--sp-3);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-width: 300px;
  max-width: 420px;
  padding: var(--sp-2);
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--color-green);
  pointer-events: auto;

  /* Slide-in animation */
  animation: toast-slide-in 0.4s var(--ease-spring) forwards;
}

.toast--leaving {
  animation: toast-slide-out 0.3s var(--ease-out) forwards;
}

.toast--error {
  border-left-color: var(--color-red);
}

.toast__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-green);
}

.toast--error .toast__icon {
  color: var(--color-red);
}

.toast__content {
  flex: 1;
}

.toast__title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-grey-900);
  margin-bottom: 2px;
}

.toast__message {
  font-size: var(--text-xs);
  color: var(--color-grey-600);
  line-height: var(--leading-snug);
}

.toast__close {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-grey-400);
  border-radius: var(--radius);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.toast__close:hover {
  background-color: var(--color-grey-100);
  color: var(--color-grey-900);
}

@keyframes toast-slide-in {
  0% {
    opacity: 0;
    transform: translateX(100%) translateY(8px);
  }
  100% {
    opacity: 1;
    transform: translateX(0) translateY(0);
  }
}

@keyframes toast-slide-out {
  0% {
    opacity: 1;
    transform: translateX(0);
  }
  100% {
    opacity: 0;
    transform: translateX(110%);
  }
}

/* =========================================================================
   LOADING SPINNER
   ========================================================================= */

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-grey-200);
  border-top-color: var(--color-green);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

.spinner--lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* =========================================================================
   DIVIDER
   ========================================================================= */

.divider {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-block: var(--sp-3);
  color: var(--color-grey-400);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background-color: var(--color-grey-200);
}

/* =========================================================================
   SKIP LINK
   ========================================================================= */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-2);
  z-index: 9999;
  padding: var(--sp-1) var(--sp-2);
  background-color: var(--color-green);
  color: var(--color-white);
  font-weight: var(--weight-semibold);
  border-radius: 0 0 var(--radius) var(--radius);
  transform: translateY(0);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: none;
}

/* =========================================================================
   RADIO OPTION — Styled radio button cards (hardware controls)
   ========================================================================= */

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.75rem 1rem;
  background-color: var(--color-white);
  border: var(--border-width) solid var(--color-grey-200);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.radio-option:hover {
  border-color: var(--color-grey-400);
  background-color: var(--color-grey-50);
}

.radio-option--selected {
  border-color: var(--color-green);
  background-color: var(--color-green-muted);
  box-shadow: 0 0 0 1px var(--color-green);
}

.radio-option__input {
  /* Visually hidden but accessible */
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.radio-option__indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border: 2px solid var(--color-grey-300);
  border-radius: var(--radius-full);
  background-color: var(--color-white);
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.radio-option--selected .radio-option__indicator {
  border-color: var(--color-green);
  background-color: var(--color-green);
}

.radio-option--selected .radio-option__indicator::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-white);
}

.radio-option__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-grey-900);
}

.radio-option--selected .radio-option__label {
  color: var(--color-green-dark);
  font-weight: var(--weight-semibold);
}