/* =====================================================================
   IHA Spaces — Components
   Primitives only. Add components when you need them more than twice.
   ===================================================================== */

/* ---------- Container ---------- */

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding-mobile);
  width: 100%;
}
@media (min-width: 768px) {
  .container { padding-inline: var(--container-padding-tablet); }
}
@media (min-width: 1280px) {
  .container { padding-inline: var(--container-padding-desktop); }
}

.container--narrow {
  max-width: 880px;
}

.container--wide {
  max-width: 1440px;
}

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

.section {
  padding-block: var(--section-spacing-m);
}

.section--tight  { padding-block: var(--section-spacing-s); }
.section--large  { padding-block: var(--section-spacing-l); }
.section--xlarge { padding-block: var(--section-spacing-xl); }

.section--brand {
  background: var(--surface-brand);
  color: var(--text-on-brand);
}
.section--brand h1, .section--brand h2, .section--brand h3, .section--brand h4 {
  color: var(--text-on-brand);
}
.section--brand a {
  color: var(--chalk-50);
  text-decoration-color: var(--chalk-200);
}
.section--brand a:hover { color: var(--chalk-100); }

.section--inverse {
  background: var(--surface-inverse);
  color: var(--text-inverse);
}
.section--inverse h1, .section--inverse h2, .section--inverse h3, .section--inverse h4 {
  color: var(--text-inverse);
}
.section--inverse a {
  color: var(--athangudi-200);   /* light-on-dark per §1.3 */
}
.section--inverse a:hover { color: var(--athangudi-100); }
.section--inverse .eyebrow { color: var(--text-inverse-soft); }

.section--secondary {
  background: var(--surface-secondary);
}

/* ---------- Skip link (WCAG 2.4.1) ---------- */

.skip-link {
  position: absolute;
  top: -50px;
  left: var(--space-4);
  background: var(--surface-primary);
  color: var(--text-primary);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  border: 1px solid var(--border-default);
  font-family: var(--font-sans);
  font-size: var(--text-label-l);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  z-index: 1000;
  transition: top 200ms ease;
}
.skip-link:focus {
  top: var(--space-4);
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--font-sans);
  font-size: var(--text-label-l);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.btn-primary {
  background: var(--action-primary);
  color: var(--text-on-brand);
}
.btn-primary:hover  { background: var(--action-primary-hover); color: var(--text-on-brand); }
.btn-primary:active { background: var(--action-primary-active); }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--text-primary);
}
.btn-secondary:hover {
  background: var(--text-primary);
  color: var(--text-inverse);
}

.btn-secondary--inverse {
  color: var(--text-inverse);
  border-color: var(--text-inverse);
  background: transparent;
}
.btn-secondary--inverse:hover {
  background: var(--text-inverse);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-brand);
  padding-inline: 0;
  min-height: 32px;
  border-bottom: 1px solid currentColor;
  letter-spacing: var(--tracking-wider);
  font-size: var(--text-label-m);
}
.btn-ghost:hover { color: var(--text-brand-strong); }

.btn:disabled {
  background: var(--action-disabled-bg);
  color: var(--action-disabled-text);
  cursor: not-allowed;
  border-color: transparent;
}

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

/* ---------- Form inputs ---------- */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.field-label {
  font-family: var(--font-sans);
  font-size: var(--text-label-m);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-secondary);
}

.input, .textarea {
  font-family: var(--font-sans);
  font-size: var(--text-body-m);
  color: var(--text-primary);
  background: var(--surface-secondary);
  border: 1px solid var(--border-default);
  border-radius: 0;
  padding: var(--space-3) var(--space-4);
  min-height: 44px;
  width: 100%;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.textarea {
  min-height: 144px;
  resize: vertical;
  font-family: var(--font-serif);
  font-size: var(--text-body-m);
  line-height: var(--leading-relaxed);
}
.input::placeholder, .textarea::placeholder {
  color: var(--text-secondary);
  opacity: 1;
}
.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px var(--athangudi-100);
}
.input:disabled, .textarea:disabled {
  background: var(--action-disabled-bg);
  color: var(--action-disabled-text);
}
.input[aria-invalid="true"], .textarea[aria-invalid="true"] {
  border-color: var(--athangudi-600);
}
.field-error {
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  color: var(--athangudi-800);
}

/* ---------- Card ---------- */

.card {
  background: var(--surface-secondary);
  padding: var(--space-6);
  border: 1px solid var(--border-subtle);
}

/* ---------- Hairline divider ---------- */

.hairline {
  border: 0;
  border-top: 1px solid var(--border-subtle);
  margin: 0;
}

/* ---------- Site nav (shared shell — option layouts customise positioning) ---------- */

.site-nav {
  width: 100%;
  background: var(--surface-primary);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border-subtle);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-5);
}

.site-nav__brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary);
  line-height: 1;
}
.site-nav__brand-img {
  display: block;
  height: 40px;
  width: auto;
}
@media (min-width: 1024px) {
  .site-nav__brand-img { height: 44px; }
}

.site-nav__links {
  display: none;
  gap: var(--space-6);
  align-items: center;
}
.site-nav__links a {
  font-family: var(--font-sans);
  font-size: var(--text-label-l);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-primary);
  text-decoration: none;
  padding-block: var(--space-2);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease, color 200ms ease;
}
.site-nav__links a:hover {
  border-bottom-color: var(--text-brand);
  color: var(--text-brand);
}
.site-nav__links a[aria-current="page"] {
  border-bottom-color: var(--text-primary);
}
@media (min-width: 768px) {
  .site-nav__links { display: flex; }
}

.site-nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-default);
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
}
.site-nav__toggle-bar {
  width: 18px;
  height: 1px;
  background: var(--text-primary);
  transition: transform 200ms ease, opacity 200ms ease;
}
.site-nav__toggle:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}
@media (min-width: 768px) {
  .site-nav__toggle { display: none; }
}

.site-nav__menu {
  display: none;
  flex-direction: column;
  gap: var(--space-5);
  padding-block: var(--space-6);
  border-top: 1px solid var(--border-subtle);
}
@media (max-width: 767.98px) {
  .site-nav__menu[data-open="true"] {
    display: flex;
  }
}
.site-nav__menu a {
  font-family: var(--font-serif);
  font-size: var(--text-heading-m);
  color: var(--text-primary);
  text-decoration: none;
}

/* ---------- Site footer ---------- */

.site-footer {
  background: var(--surface-inverse);
  color: var(--text-inverse);
  padding-block: var(--space-9) var(--space-6);
  margin-top: var(--section-spacing-l);
}
.site-footer h2, .site-footer h3, .site-footer h4 {
  color: var(--text-inverse);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--ink-600);
}
@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-8);
  }
}
.site-footer__col h4 {
  font-family: var(--font-sans);
  font-size: var(--text-label-m);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-inverse-soft);
  margin-bottom: var(--space-4);
}
.site-footer__col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.site-footer__col a {
  color: var(--text-inverse);
  text-decoration: none;
  font-family: var(--font-serif);
  font-size: var(--text-body-m);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease;
}
.site-footer__col a:hover {
  border-bottom-color: var(--athangudi-200);
  color: var(--athangudi-200);
}
.site-footer__manifesto {
  font-family: var(--font-serif);
  font-size: var(--text-heading-s);
  font-style: italic;
  color: var(--text-inverse-soft);
  max-width: 36ch;
  line-height: var(--leading-relaxed);
}
.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  color: var(--text-inverse-soft);
}
@media (min-width: 768px) {
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* ---------- Image frame (used for hover-zoom inside overflow:hidden) ---------- */

.frame {
  display: block;
  overflow: hidden;
  position: relative;
  background: var(--surface-tertiary);
}
.frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1200ms cubic-bezier(0.16, 0.84, 0.44, 1);
}
.frame:hover img,
a:hover .frame img {
  transform: scale(1.04);
}

/* ---------- Caption ---------- */

.caption {
  font-family: var(--font-serif);
  font-size: var(--text-caption);
  font-style: italic;
  color: var(--text-secondary);
  margin-top: var(--space-3);
  display: block;
}