/* ==========================================================================
   Component Styles — Header, Buttons, Forms, Cards, Accordion
   ========================================================================== */

/* ---- Site Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  min-height: var(--header-height);
  background: var(--color-bg-primary);
  border-bottom: var(--border-width) solid var(--color-border);
  transition: box-shadow var(--transition-normal);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: var(--header-height);
}

.site-header__inner.container {
  max-width: var(--header-max-width);
}

.site-header__brand {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-heading);
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}

.site-header__brand:hover,
.site-header__brand:focus-visible {
  color: var(--color-accent-hover);
}

.site-header__brand-text {
  display: block;
  max-width: 12rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: var(--space-sm);
  border-radius: var(--border-radius);
  border: var(--border-width) solid var(--color-border);
  background: rgba(255, 255, 255, 0.04);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.site-header__toggle:hover,
.site-header__toggle:focus-visible {
  border-color: var(--color-accent);
  background: rgba(201, 169, 110, 0.1);
}

.site-header__toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-heading);
  border-radius: 1px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header__panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  padding: var(--space-md) var(--container-padding) var(--space-lg);
  background: var(--color-bg-primary);
  border-bottom: var(--border-width) solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.site-header__panel.is-open {
  display: block;
  animation: navSlideDown var(--transition-normal) ease;
}

@keyframes navSlideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Main Navigation ---- */
.main-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.main-nav__link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-body);
  border-radius: var(--border-radius-pill);
  transition: color var(--transition-fast),
              background-color var(--transition-fast),
              transform var(--transition-fast);
}

.main-nav__link:hover,
.main-nav__link:focus-visible {
  color: var(--color-heading);
  background: rgba(245, 230, 200, 0.08);
}

.main-nav__link--active {
  color: var(--color-bg-primary);
  background: var(--color-accent);
  font-weight: 600;
}

.main-nav__link--active:hover,
.main-nav__link--active:focus-visible {
  color: var(--color-bg-primary);
  background: var(--color-accent-hover);
}

/* ---- Language Switcher ---- */
.language-switcher {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: var(--border-width) solid var(--color-border);
}

.language-switcher__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.language-switcher__link {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-body-muted);
  border: var(--border-width) solid transparent;
  border-radius: var(--border-radius-pill);
  transition: color var(--transition-fast),
              border-color var(--transition-fast),
              background var(--transition-fast);
}

.language-switcher__link:hover,
.language-switcher__link:focus-visible {
  color: var(--color-heading);
  border-color: var(--color-border);
}

.language-switcher__link--active {
  color: var(--color-accent);
  border-color: rgba(201, 169, 110, 0.45);
  background: rgba(201, 169, 110, 0.12);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.4;
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--border-radius-pill);
  background: transparent;
  color: var(--color-heading);
  text-align: center;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
}

.btn:hover,
.btn:focus-visible {
  background-color: var(--color-heading);
  color: var(--color-bg-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

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

.btn--primary,
.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, #b8935a 100%);
  border-color: transparent;
  color: var(--color-bg-primary);
}

.btn--primary:hover,
.btn--primary:focus-visible,
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-heading);
  border-color: transparent;
  color: var(--color-bg-primary);
}

.btn--full {
  width: 100%;
}

.btn-text,
.btn-loading {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ---- Forms ---- */
.page-section form,
.rsvp-form,
.contact-form {
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding: var(--space-xl);
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-glow);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label,
.form-group legend {
  display: block;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-heading);
  letter-spacing: 0.03em;
}

.form-group legend {
  padding: 0;
}

.form-input,
.form-textarea,
.form-select,
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--font-size-base);
  color: var(--color-body);
  background: rgba(61, 43, 31, 0.6);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-md);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus,
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(61, 43, 31, 0.8);
  box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(232, 213, 183, 0.45);
}

.form-group textarea {
  min-height: 8rem;
  resize: vertical;
}

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

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1rem;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast),
              background var(--transition-fast);
}

.radio-label:hover {
  border-color: rgba(201, 169, 110, 0.5);
  background: rgba(201, 169, 110, 0.06);
}

.radio-label input {
  accent-color: var(--color-accent);
  width: 1.1rem;
  height: 1.1rem;
}

.radio-label:has(input:checked) {
  border-color: var(--color-accent);
  background: rgba(201, 169, 110, 0.12);
}

.form-radio-group,
.form-checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-xs);
}

.form-actions {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: var(--border-width) solid var(--color-border);
}

.field-error,
.form-error {
  display: block;
  margin-top: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity var(--transition-fast), max-height var(--transition-fast);
}

.field-error.is-visible,
.field-error:not([hidden]),
.form-error.is-visible {
  opacity: 1;
  max-height: 100px;
}

.form-group input.is-invalid,
.form-group textarea.is-invalid,
.form-group select.is-invalid {
  border-color: var(--color-error);
}

/* ---- Toast notification ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: max(var(--space-lg), env(safe-area-inset-bottom, 0px));
  z-index: 400;
  width: min(calc(100% - 2 * var(--space-lg)), 28rem);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  font-size: var(--font-size-sm);
  line-height: var(--line-height);
  text-align: center;
  pointer-events: none;
  transform: translate(-50%, calc(100% + var(--space-xl)));
  opacity: 0;
  transition:
    transform 0.35s ease,
    opacity 0.35s ease;
}

.toast.is-visible {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
}

.toast__message {
  margin: 0;
}

.toast--success {
  background: rgba(45, 74, 54, 0.96);
  border: var(--border-width) solid rgba(74, 124, 89, 0.55);
  color: #9fd4ad;
}

.toast--error {
  background: rgba(74, 36, 32, 0.96);
  border: var(--border-width) solid rgba(231, 76, 60, 0.5);
  color: #f5a5a5;
}

.accommodation-section {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  margin-bottom: 0;
  transition: max-height var(--transition-normal),
              opacity var(--transition-normal),
              margin var(--transition-normal);
}

.accommodation-section.is-visible,
.accommodation-section:not([hidden]) {
  max-height: 400px;
  opacity: 1;
  margin-bottom: var(--space-lg);
}

/* ---- Cards ---- */
.card {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

/* ---- Accordion (FAQ) ---- */
.accordion {
  max-width: 48rem;
  margin-inline: auto;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  background: var(--color-surface-soft);
  box-shadow: var(--shadow-glow);
}

.accordion-item {
  border-bottom: var(--border-width) solid var(--color-border);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  margin: 0;
}

.accordion-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  width: 100%;
  padding: var(--space-lg) var(--space-xl);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-heading);
  text-align: left;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.accordion-toggle:hover,
.accordion-toggle:focus-visible {
  background: rgba(201, 169, 110, 0.08);
}

.accordion-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-accent);
  border: var(--border-width) solid var(--color-border);
  border-radius: 50%;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.accordion-toggle[aria-expanded="true"] .accordion-icon {
  transform: rotate(180deg);
  background: rgba(201, 169, 110, 0.15);
}

.accordion-panel {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height var(--transition-normal),
              opacity var(--transition-normal),
              padding var(--transition-normal);
}

.accordion-panel:not([hidden]) {
  max-height: 24rem;
  opacity: 1;
}

.accordion-panel p {
  padding: 0 var(--space-xl) var(--space-lg);
  color: var(--color-body-muted);
  line-height: var(--line-height);
}

/* ---- Badges ---- */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: var(--border-radius-pill);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-attending {
  background: rgba(74, 124, 89, 0.2);
  color: #9fd4ad;
  border: var(--border-width) solid rgba(74, 124, 89, 0.45);
}

.badge-not-attending {
  background: rgba(231, 76, 60, 0.15);
  color: #f5a5a5;
  border: var(--border-width) solid rgba(231, 76, 60, 0.35);
}

/* ---- Desktop header ---- */
@media (min-width: 1024px) {
  .site-header__toggle {
    display: none;
  }

  .site-header__inner {
    gap: var(--space-lg);
  }

  .site-header__brand {
    flex-shrink: 0;
  }

  .site-header__brand-text {
    max-width: none;
  }

  .site-header__panel {
    display: flex;
    flex: 1;
    min-width: 0;
    position: static;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-lg);
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    border: none;
    box-shadow: none;
  }

  .main-nav {
    flex: 1;
    min-width: 0;
  }

  .main-nav__list {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-end;
    align-items: center;
    gap: 0.125rem;
  }

  .main-nav__item {
    flex-shrink: 0;
  }

  .main-nav__link {
    padding: var(--space-sm) 0.625rem;
    font-size: var(--nav-link-size);
    letter-spacing: 0.01em;
    white-space: nowrap;
  }

  .language-switcher {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    flex-shrink: 0;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) and (max-width: 1279px) {
  .main-nav__link {
    font-size: 0.75rem;
    padding: var(--space-sm) 0.5rem;
  }
}

@media (min-width: 1280px) {
  .site-header__inner.container {
    padding-inline: var(--space-xl);
  }

  .main-nav__list {
    gap: var(--space-xs);
  }

  .main-nav__link {
    padding: var(--space-sm) 0.75rem;
  }
}

@media (min-width: 1440px) {
  .main-nav__link {
    padding: var(--space-sm) var(--space-md);
  }
}

@media (min-width: 768px) {
  .radio-group {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .radio-label {
    flex: 1;
    min-width: 10rem;
  }
}