/* ============================================================
   A Case for Wisdom — Shared Components
   Navbar, footer, buttons, form controls, alerts, skeletons,
   layout primitives. Content-first and restrained: one surface,
   hairline rules, gold used sparingly. Every value from tokens.css.
   ============================================================ */

/* ============================================================
   1. NAVBAR — quiet masthead, 56px, hairline underneath
   ============================================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background-color: var(--color-surface-base);
  border-bottom: 1px solid var(--color-rule);
}

.nav__inner {
  max-width: var(--container-full);
  margin-inline: auto;
  min-height: 56px;
  padding-inline: var(--space-section-x);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
}

/* ---- Brand: mark + name set quietly in the display face ---- */
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-green);
}
.nav__brand:hover,
.nav__brand:focus-visible { text-decoration: none; }

.nav__logo {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  color: var(--color-green);
}

.nav__brand-text {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-tight);
  color: var(--color-green);
  white-space: nowrap;
}

/* ---- Primary links: centre/right, muted, underline on hover ---- */
.nav__links {
  display: none;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-6);
}
@media (min-width: 48rem) {
  .nav__links { display: inline-flex; }
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  white-space: nowrap;
}
.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.nav__link[aria-current="page"] {
  color: var(--color-green);
  text-decoration: none;
}

.nav__actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

/* ---- Cart: plain icon; count only renders when > 0 (site.js) ---- */
.nav__cart {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-green);
}
.nav__cart:hover { text-decoration: none; color: var(--color-green); }

.nav__cart-count {
  position: absolute;
  top: 2px;
  right: 0;
  min-width: 16px;
  height: 16px;
  padding-inline: 4px;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: var(--weight-semibold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-green);
  color: var(--color-text-invert);
  border-radius: var(--radius-md);
}
.nav__cart-count[hidden] { display: none; }

/* ---- Mobile toggle (plain icon swap, no animation) ---- */
.nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-green);
  background: transparent;
  border: 0;
  cursor: pointer;
}
@media (min-width: 48rem) {
  .nav__toggle { display: none; }
}

.nav__drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(86vw, 320px);
  background: var(--color-surface-base);
  border-left: 1px solid var(--color-rule);
  padding: var(--space-7) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-standard);
  z-index: var(--z-drawer);
}
.nav__drawer[data-open="true"] { transform: translateX(0); }
.nav__drawer .nav__link {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-green);
}

/* ============================================================
   2. FOOTER — brand + tagline left, essential links right
   ============================================================ */

.footer {
  margin-top: var(--space-12);
  background: var(--color-green);
  color: var(--color-text-invert);
  padding: var(--space-8) 0;
}

.footer__inner {
  max-width: var(--container-full);
  margin-inline: auto;
  padding-inline: var(--space-section-x);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6);
}

.footer__brand {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-invert);
}

.footer__tagline {
  margin-top: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-gold-soft);
  max-width: 34ch;
}

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

.footer__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-invert);
}
.footer__link:hover,
.footer__link:focus-visible {
  color: var(--color-gold-soft);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.footer__bottom {
  max-width: var(--container-full);
  margin: var(--space-7) auto 0;
  padding: var(--space-5) var(--space-section-x) 0;
  border-top: 1px solid rgba(245, 240, 234, 0.18);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-gold-soft);
}

/* ============================================================
   3. BUTTONS — stripped back: primary + ghost only
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-regular);
  padding: 8px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: var(--transition-colors);
}
.btn:hover { text-decoration: none; }
.btn:disabled,
.btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }

/* Primary — solid green, cream text, normal weight, no uppercase */
.btn--primary {
  background-color: var(--color-green);
  color: var(--color-text-invert);
  border-color: var(--color-green);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-green-hover);
  border-color: var(--color-green-hover);
  color: var(--color-text-invert);
}

/* Ghost — transparent, 1px current-colour border */
.btn--ghost {
  background: transparent;
  color: inherit;
  border-color: currentColor;
}
.btn--ghost:hover,
.btn--ghost:focus-visible { background: transparent; }

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

/* ============================================================
   4. FORM CONTROLS — plain, hairline borders
   ============================================================ */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.field__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
}

.input,
.textarea,
.select {
  min-height: var(--control-height-md);
  padding: var(--space-3) var(--control-pad-x);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-surface-base);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  transition: var(--transition-colors);
  width: 100%;
}

.textarea { resize: vertical; min-height: 8rem; line-height: var(--leading-relaxed); }

.input::placeholder,
.textarea::placeholder { color: var(--color-text-soft); }

.input:focus-visible,
.textarea:focus-visible,
.select:focus-visible {
  border-color: var(--color-green);
  box-shadow: none;
  outline: none;
}

.field__hint { font-size: var(--text-xs); color: var(--color-text-muted); }
.field__error { font-size: var(--text-xs); color: var(--color-error); }
.field--invalid .input,
.field--invalid .textarea,
.field--invalid .select { border-color: var(--color-error); }

/* ============================================================
   5. ALERTS
   ============================================================ */

.alert {
  padding: var(--space-4) var(--space-5);
  border-left: 2px solid var(--color-rule);
  font-size: var(--text-sm);
  color: var(--color-text);
}
.alert--error   { border-color: var(--color-error); }
.alert--success { border-color: var(--color-success); }

/* ============================================================
   6. LOADING SKELETONS — quiet pulsing blocks
   ============================================================ */

.skeleton {
  position: relative;
  overflow: hidden;
  background: rgba(43, 62, 30, 0.07);
  border-radius: var(--radius-sm);
  animation: skeleton-pulse 1.4s ease-in-out infinite;
}

@keyframes skeleton-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.55; }
}

.skeleton-line { height: 0.9rem; border-radius: var(--radius-sm); }
.skeleton-line--sm    { width: 35%; height: 0.7rem; }
.skeleton-line--title { width: 80%; height: 1.4rem; }
.skeleton-line--wide  { width: 95%; }
.skeleton-line--mid   { width: 70%; }
.skeleton-card__media { width: 100%; aspect-ratio: 4 / 3; border-radius: var(--radius-md); }

@media (prefers-reduced-motion: reduce) {
  .skeleton { animation: none; }
}

/* ============================================================
   7. LAYOUT PRIMITIVES
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--space-section-x);
}
.container--narrow { max-width: var(--container-narrow); }
.container--prose  { max-width: var(--container-prose); }
.container--mid    { max-width: var(--container-mid); }
.container--full   { max-width: var(--container-full); }

.section { padding-block: var(--space-section-y); }

/* ============================================================
   8. ACCESSIBILITY HELPERS
   ============================================================ */

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  z-index: var(--z-max);
  padding: var(--space-3) var(--space-4);
  background: var(--color-green);
  color: var(--color-text-invert);
  font-size: var(--text-sm);
  transform: translateY(-200%);
  transition: transform var(--duration-fast) var(--ease-standard);
}
.skip-link:focus-visible { transform: translateY(0); }

/* ============================================================
   9. SCROLL REVEAL — gentle, optional
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--duration-slow) var(--ease-standard),
              transform var(--duration-slow) var(--ease-standard);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}