/* ==========================================================================
   Vibeberg — components.css
   Nav, cards, buttons, toggle, badges, CTA.
   Structural/design changes only — do not add page-layout/grid rules here.
   ========================================================================== */

/* ---- Site header / nav -------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
  padding: var(--space-4) 0;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-right: auto;
  white-space: nowrap;
}

.site-logo span {
  color: var(--color-accent-primary-text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  overflow-x: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.site-nav a:hover {
  color: var(--color-text-primary);
}

.site-nav a[aria-current="page"] {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-accent-primary);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

/* ---- Theme toggle -------------------------------------------------------- */

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
  background-color: var(--color-bg-elevated);
  color: var(--color-text-primary);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---- Buttons / CTA -------------------------------------------------------- */
/* Generic .btn + .btn--<variant> system so future CTA types (newsletter,
   product purchase, community links) can be added without new components. */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: var(--space-3) var(--space-5);
  border-radius: 999px;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn--primary {
  background-color: var(--color-accent-primary-text);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background-color: var(--color-focus-ring);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .btn--primary {
  background-color: var(--color-accent-primary);
  color: #1C1917;
}

[data-theme="dark"] .btn--primary:hover {
  background-color: var(--color-accent-secondary);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  background-color: var(--color-bg-elevated);
  border-color: var(--color-text-secondary);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-accent-primary-text);
  padding-left: 0;
  padding-right: 0;
}

[data-theme="dark"] .btn--ghost {
  color: var(--color-accent-primary);
}

.btn--ghost:hover {
  color: var(--color-focus-ring);
}

[data-theme="dark"] .btn--ghost:hover {
  color: var(--color-accent-secondary);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.8125rem;
}

.btn--block {
  width: 100%;
  justify-content: center;
}

/* ---- Badges / type tags -------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.badge--content {
  color: var(--color-accent-primary-text);
  border-color: color-mix(in srgb, var(--color-accent-primary) 40%, var(--color-border));
}

[data-theme="dark"] .badge--content {
  color: var(--color-accent-primary);
}

.badge--product {
  color: var(--color-success);
  border-color: color-mix(in srgb, var(--color-success) 40%, var(--color-border));
}

.badge--code {
  color: var(--color-accent-secondary);
  border-color: color-mix(in srgb, var(--color-accent-secondary) 50%, var(--color-border));
}

/* ---- Cards -------------------------------------------------------- */

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
  height: 100%;
}

a.card:hover,
a.card:focus-visible {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--color-accent-primary) 45%, var(--color-border));
}

.card__media {
  aspect-ratio: 16 / 10;
  width: 100%;
  overflow: hidden;
  background-color: var(--color-border);
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

a.card:hover .card__media img {
  transform: scale(1.04);
}

.card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card__date {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.card__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.card__excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  flex: 1;
}

.card__footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-1);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent-primary-text);
}

[data-theme="dark"] .card__footer {
  color: var(--color-accent-primary);
}

/* Library grid cards read as archival — quieter, no hover lift needed but kept
   consistent; secondary feed cards get a "fresh" treatment via .card--fresh. */
.card--fresh {
  border-color: color-mix(in srgb, var(--color-accent-primary) 35%, var(--color-border));
}

.card--fresh .card__media {
  position: relative;
}

.card--fresh .card__media::after {
  content: "Recently featured";
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background-color: var(--color-overlay);
  color: #FFFFFF;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
}

/* ---- Featured slot -------------------------------------------------- */

.featured {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-8) 0;
}

.featured__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
}

.featured__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured__eyebrow {
  margin-bottom: var(--space-3);
}

.featured__title {
  margin-bottom: var(--space-4);
}

.featured__subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-text-secondary);
  font-size: 1.125rem;
  margin-bottom: var(--space-4);
}

.featured__excerpt {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  max-width: 46ch;
}

.featured__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---- Section headers -------------------------------------------------- */

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section-header__title {
  font-size: 1.375rem;
}

.section-header__hint {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ---- Footer -------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-7) 0;
  margin-top: var(--space-9);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.site-footer__brand {
  font-family: var(--font-serif);
  font-size: 1.125rem;
}

.site-footer__links {
  display: flex;
  gap: var(--space-5);
}

.site-footer__links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.site-footer__links a:hover {
  color: var(--color-text-primary);
}

.site-footer__copy {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  width: 100%;
}

/* ---- Page header (Library / About / detail) -------------------------------------------------- */

.page-header {
  padding: var(--space-8) 0 var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-7);
}

.page-header__title {
  margin-bottom: var(--space-3);
}

.page-header__lede {
  color: var(--color-text-secondary);
  max-width: 60ch;
  font-size: 1.0625rem;
}

/* ---- About page -------------------------------------------------- */

.about-hero {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-8);
  align-items: center;
  padding-bottom: var(--space-8);
}

.about-hero__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 1 / 1;
}

.about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-block {
  padding: var(--space-7) 0;
  border-top: 1px solid var(--color-border);
}

.about-block__title {
  margin-bottom: var(--space-4);
}

.about-block__body {
  color: var(--color-text-secondary);
  max-width: 68ch;
  font-size: 1.0625rem;
}

.about-block__body + .about-block__body {
  margin-top: var(--space-4);
}

.pull-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.5rem;
  line-height: 1.4;
  color: var(--color-text-primary);
  border-left: 3px solid var(--color-accent-primary);
  padding-left: var(--space-5);
  margin: var(--space-6) 0;
  max-width: 56ch;
}

/* ---- Detail (item) page -------------------------------------------------- */

.item-hero__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--space-6);
  aspect-ratio: 16 / 9;
}

.item-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.item-hero__title {
  margin-bottom: var(--space-3);
}

.item-hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.item-body {
  max-width: 68ch;
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
}

.item-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

/* ---- Empty / not-found state -------------------------------------------------- */

.empty-state {
  text-align: center;
  padding: var(--space-9) var(--space-4);
  color: var(--color-text-secondary);
}

.empty-state__title {
  margin-bottom: var(--space-3);
}