/* ============================================================
   components.css
   Reusable component primitives used by every page.
   Semantic tokens only. No raw hex, no primitives.
   ============================================================ */

/* ============================================================
   HEADER
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface-page);
  border-bottom: 1px solid var(--border-default);
  transition: box-shadow var(--duration-base) var(--ease-out),
              padding var(--duration-base) var(--ease-out);
}
.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 72px;
  transition: height var(--duration-base) var(--ease-out);
}
.site-header.is-scrolled .site-header__inner { height: 56px; }

.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
  padding: var(--space-1) 0;
  border-radius: var(--radius-sm);
}
.site-header__logo:hover { text-decoration: none; color: var(--text-primary); }
.site-header__logo:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 4px;
}
.site-header__logo-next {
  height: 22px;
  width: auto;
  display: block;
}
.site-header__logo-slb {
  height: 16px;
  width: auto;
  display: block;
}
.site-header__logo-tagline {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0;
  white-space: nowrap;
}

.site-header__search {
  flex: 1;
  max-width: 480px;
  position: relative;
}
.site-header__search-input {
  width: 100%;
  height: var(--size-md);
  padding: 0 var(--space-3) 0 var(--space-10);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--surface-subtle);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  transition: border-color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}
.site-header__search-input::placeholder { color: var(--text-muted); }
.site-header__search-input:hover { border-color: var(--border-strong); }
.site-header__search-input:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  background: var(--surface-page);
}
.site-header__search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.cross-audience-link {
  display: inline-flex;
  align-items: center;
  height: var(--size-md);
  padding: 0 var(--space-3);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--duration-fast) var(--ease-out);
}
.cross-audience-link:hover {
  color: var(--text-link);
  text-decoration: none;
}
.cross-audience-link::after {
  content: " →";
  margin-left: var(--space-1);
  transition: transform var(--duration-fast) var(--ease-out);
  display: inline-block;
}
.cross-audience-link:hover::after {
  transform: translateX(2px);
}

.site-header__divider {
  width: 1px;
  height: 24px;
  background: var(--border-default);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
}
.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Sizes */
.btn--sm { height: var(--size-sm); padding: 0 var(--space-3); font-size: var(--text-xs); }
.btn--md { height: var(--size-md); padding: 0 var(--space-4); }
.btn--lg { height: var(--size-lg); padding: 0 var(--space-6); font-size: var(--text-base); }
.btn--xl { height: var(--size-xl); padding: 0 var(--space-8); font-size: var(--text-base); }

/* Variants */
.btn--primary {
  background: var(--action-primary-bg);
  color: var(--action-primary-text);
}
.btn--primary:hover { background: var(--action-primary-bg-hover); }
.btn--primary:active { background: var(--action-primary-bg-active); }
.btn--primary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn--secondary {
  background: var(--surface-page);
  color: var(--action-secondary-text);
  border-color: var(--action-secondary-border);
}
.btn--secondary:hover {
  border-color: var(--action-secondary-border-hover);
  background: var(--surface-subtle);
}
.btn--secondary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn--tertiary {
  background: transparent;
  color: var(--text-link);
  padding-inline: var(--space-2);
}
.btn--tertiary:hover { color: var(--text-link-hover); text-decoration: underline; }
.btn--tertiary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* AI variant — uses --ai-* tokens (aqua-blue family per brand policy) */
.btn--ai {
  background: var(--ai-bg-strong);
  color: var(--action-primary-text);
}
.btn--ai:hover { background: var(--aqua-700); }
.btn--ai:focus-visible {
  outline: 2px solid var(--ai-accent);
  outline-offset: 2px;
}

.btn--icon-only {
  width: var(--size-md);
  padding: 0;
}
.btn--icon-only.btn--sm { width: var(--size-sm); }

/* ============================================================
   BADGES & CHIPS
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 var(--space-2);
  font-size: 11px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* Subtle variants — preferred for taxonomy (format, level, topic) */
.badge--format {
  background: var(--action-primary-soft-bg);
  color: var(--action-primary-soft-text);
}
.badge--level {
  background: var(--surface-muted);
  color: var(--text-secondary);
}
.badge--topic {
  background: var(--status-info-bg);
  color: var(--status-info-text);
}
.badge--ai {
  background: var(--ai-bg);
  color: var(--ai-text);
}
.badge--promo {
  background: var(--promo-bg);
  color: var(--promo-text);
}
.badge--success {
  background: var(--status-success-bg);
  color: var(--status-success-text);
}
.badge--warning {
  background: var(--status-warning-bg);
  color: var(--status-warning-text);
}
.badge--danger {
  background: var(--status-danger-bg);
  color: var(--status-danger-text);
}
/* Pushes a badge to the end of its flex container — replaces inline margin-left:auto */
.badge--end {
  margin-left: auto;
}

/* Chip — interactive filter / multi-select */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: var(--size-sm);
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  background: var(--surface-page);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
  text-decoration: none;
}
.chip:hover {
  border-color: var(--border-strong);
  background: var(--surface-subtle);
}
.chip:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}
.chip[aria-pressed="true"], .chip.is-selected {
  background: var(--action-primary-soft-bg);
  border-color: var(--action-primary-bg);
  color: var(--action-primary-soft-text);
}

/* AI chip — used inside Planner */
.chip--ai {
  border-color: var(--ai-border);
  background: var(--surface-page);
  color: var(--ai-text);
}
.chip--ai:hover {
  background: var(--ai-bg);
  border-color: var(--ai-accent);
}
.chip--ai[aria-pressed="true"] {
  background: var(--ai-bg);
  border-color: var(--ai-bg-strong);
  color: var(--ai-text);
}

/* ============================================================
   COURSE CARD
   ============================================================ */

.course-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--surface-page);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
  text-decoration: none;
  color: inherit;
}
.course-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
  text-decoration: none;
  color: inherit;
}
.course-card:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.course-card__badges {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.course-card__title {
  font-size: var(--text-lg);
  line-height: var(--leading-lg);
  font-weight: 600;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: var(--space-1);
}

.course-card__hook {
  font-size: var(--text-sm);
  line-height: var(--leading-sm);
  font-weight: 500;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
}
.course-card__meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}
.course-card__meta-separator {
  color: var(--border-default);
}

.course-card__rating {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-secondary);
}
.course-card__rating-star {
  color: var(--yellow-600);
  flex-shrink: 0;
}
.course-card__rating-value {
  color: var(--text-primary);
  font-weight: 600;
}
/* legacy 5-star treatment retained for backward compat */
.course-card__rating-stars {
  color: var(--yellow-600);
  display: inline-flex;
}

.course-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

.course-card__price {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1;
}
.course-card__price-suffix {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  margin-left: var(--space-1);
}

.course-card__cta {
  /* Inherits .btn */
}

/* Wishlist heart toggle */
.wishlist-btn {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-page);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
  z-index: 2;
}
.wishlist-btn:hover {
  color: var(--orangered-600);
  border-color: var(--orangered-300);
}
.wishlist-btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}
.wishlist-btn:active { transform: scale(0.92); }
.wishlist-btn[aria-pressed="true"] {
  color: var(--orangered-600);
  border-color: var(--orangered-300);
  background: var(--status-danger-bg);
  animation: wishlist-pop var(--duration-slow) var(--ease-out);
}
.wishlist-btn svg { width: 18px; height: 18px; }
.wishlist-btn[aria-pressed="true"] svg {
  fill: currentColor;
}

@keyframes wishlist-pop {
  0% { transform: scale(1); }
  40% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

/* Inert state previews for the /checkpoints view */
.course-card.is-hovered {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.course-card.is-focused {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ============================================================
   AI SURFACES (Planner modal)
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--surface-overlay);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease-out),
              visibility var(--duration-base) var(--ease-out);
}
.modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.planner-modal {
  width: 100%;
  max-width: 1120px;
  max-height: calc(100vh - var(--space-16));
  background: var(--surface-page);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(8px) scale(0.99);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}
.modal-overlay.is-open .planner-modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

@media (max-width: 767px) {
  .modal-overlay { padding: 0; }
  .planner-modal { max-height: 100vh; height: 100vh; border-radius: 0; }
}

.planner-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-default);
  background: var(--ai-bg);
  border-bottom-color: var(--ai-border);
}
.planner-modal__title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--ai-text);
}
.planner-modal__title-icon {
  width: 24px;
  height: 24px;
  color: var(--ai-accent);
  flex-shrink: 0;
}
.planner-modal__teaser-badge {
  margin-left: var(--space-2);
}

.planner-modal__close {
  width: var(--size-md);
  height: var(--size-md);
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ai-text);
  background: transparent;
  transition: background var(--duration-fast) var(--ease-out);
}
.planner-modal__close:hover { background: var(--aqua-100); }
.planner-modal__close:focus-visible {
  outline: 2px solid var(--ai-accent);
  outline-offset: 2px;
}
.planner-modal__close svg { width: 20px; height: 20px; }

.planner-modal__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  flex: 1;
  min-height: 0;
}
@media (max-width: 767px) {
  .planner-modal__body { grid-template-columns: 1fr; }
  .planner-modal__plan { display: none; }
  .planner-modal__plan.is-revealed { display: flex; }
}

.planner-modal__chat {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--border-default);
}
@media (max-width: 767px) {
  .planner-modal__chat { border-right: 0; }
}

.planner-modal__messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.planner-message {
  display: flex;
  gap: var(--space-3);
  max-width: 90%;
}
.planner-message--bot {
  align-self: flex-start;
}
.planner-message--user {
  align-self: flex-end;
  flex-direction: row-reverse;
}
.planner-message__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--ai-bg);
  color: var(--ai-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--ai-border);
}
.planner-message__avatar svg { width: 16px; height: 16px; }
.planner-message--user .planner-message__avatar {
  background: var(--surface-muted);
  color: var(--text-secondary);
  border-color: var(--border-default);
}
.planner-message__bubble {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--surface-subtle);
  font-size: var(--text-sm);
  line-height: var(--leading-base);
  font-weight: 500;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
.planner-message--bot .planner-message__bubble {
  background: var(--ai-bg);
  border-color: var(--ai-border);
}
.planner-message__bubble p + p { margin-top: var(--space-2); }

.planner-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0 var(--space-6) var(--space-4) calc(var(--space-6) + 32px + var(--space-3));
}

.planner-modal__input {
  border-top: 1px solid var(--border-default);
  padding: var(--space-4) var(--space-6);
  display: flex;
  gap: var(--space-2);
  background: var(--surface-page);
}
.planner-modal__input input {
  flex: 1;
  height: var(--size-md);
  padding: 0 var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  background: var(--surface-subtle);
}
.planner-modal__input input:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  background: var(--surface-page);
}

/* Right panel — plan preview */
.planner-modal__plan {
  display: flex;
  flex-direction: column;
  background: var(--ai-bg);
  background-image:
    radial-gradient(circle at 20% 10%, var(--alpha-aqua-10), transparent 40%),
    radial-gradient(circle at 80% 90%, var(--alpha-aqua-10), transparent 40%);
  padding: var(--space-8);
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--space-4);
}
.planner-modal__plan-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  max-width: 320px;
}
.planner-modal__plan-empty-icon {
  width: 80px;
  height: 80px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--surface-page);
  border: 1px solid var(--ai-border);
  color: var(--ai-accent);
}
.planner-modal__plan-empty-icon svg { width: 32px; height: 32px; }
.planner-modal__plan-empty-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--ai-text);
}
.planner-modal__plan-empty-body {
  font-size: var(--text-sm);
  line-height: var(--leading-base);
  font-weight: 500;
  color: var(--text-secondary);
}

/* Abstract geometric SVG decoration in plan area */
.ai-geom {
  display: block;
  width: 220px;
  height: auto;
  opacity: 0.8;
  margin-top: var(--space-4);
}

/* ============================================================
   STAR ICON HELPER
   ============================================================ */
.star {
  width: 12px;
  height: 12px;
  display: inline-block;
}

/* ============================================================
   FOOTER (shared across all pages)
   ============================================================ */

.site-footer {
  background: var(--brand-deep-bg);
  color: var(--brand-deep-text);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-24);
}

.site-footer__columns {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: var(--space-8);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--alpha-blue-25);
}
@media (max-width: 1023px) {
  .site-footer__columns { grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
}
@media (max-width: 639px) {
  .site-footer__columns { grid-template-columns: 1fr; gap: var(--space-6); }
}

.site-footer__brand {
  display: grid;
  gap: var(--space-4);
}
.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--brand-deep-text);
  text-decoration: none;
  padding: var(--space-1) 0;
  border-radius: var(--radius-sm);
}
.site-footer__logo:hover { color: var(--brand-deep-text); text-decoration: none; }
.site-footer__logo:focus-visible {
  outline: 2px solid var(--brand-deep-accent);
  outline-offset: 4px;
}
.site-footer__logo-next {
  height: 26px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}
.site-footer__logo-slb {
  height: 18px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}
.site-footer__logo-tagline {
  font-size: var(--text-xs);
  color: var(--brand-deep-accent);
  font-weight: 500;
  letter-spacing: 0;
  white-space: nowrap;
}
.site-footer__brand-line {
  font-size: var(--text-sm);
  line-height: var(--leading-base);
  font-weight: 500;
  color: var(--brand-deep-accent);
  max-width: 36ch;
}
.site-footer__social {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}
.site-footer__social a {
  width: 36px;
  height: 36px;
  border: 1px solid var(--alpha-blue-25);
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-deep-accent);
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
  text-decoration: none;
}
.site-footer__social a:hover {
  color: var(--brand-deep-text);
  border-color: var(--brand-deep-accent);
  background: var(--alpha-blue-10);
}
.site-footer__social a:focus-visible {
  outline: 2px solid var(--brand-deep-accent);
  outline-offset: 2px;
}
.site-footer__social svg { width: 16px; height: 16px; }

.site-footer__col {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}
.site-footer__col-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-deep-text);
  margin-bottom: var(--space-1);
}
.site-footer__col-links {
  display: grid;
  gap: var(--space-2);
}
.site-footer__col-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--brand-deep-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
.site-footer__col-links a:hover {
  color: var(--brand-deep-text);
  text-decoration: underline;
}

.site-footer__legal {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-6);
  flex-wrap: wrap;
}
.site-footer__legal-links {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--brand-deep-accent);
}
.site-footer__legal-links a {
  color: var(--brand-deep-accent);
  text-decoration: none;
}
.site-footer__legal-links a:hover {
  color: var(--brand-deep-text);
  text-decoration: underline;
}
.site-footer__copyright {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--brand-deep-accent);
}