/* ==========================================================================
   Components — buttons, links, header, mobile menu, cards, forms, footer
   ========================================================================== */

/* ---- Buttons ------------------------------------------------------------ */
.btn-ec {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  min-height: 48px;
  padding: .875rem 1.5rem;
  font: var(--fw-medium) var(--fs-small)/1 var(--ff-body);
  border-radius: var(--radius-1);
  border: 1px solid var(--c-ink);
  background: var(--c-ink);
  color: var(--c-paper);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.btn-ec:hover { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-paper); }
.btn-ec:disabled, .btn-ec[aria-disabled="true"] { opacity: .6; cursor: progress; }
.btn-ec--ghost { background: transparent; color: var(--c-ink); }
.btn-ec--ghost:hover { background: var(--c-ink); border-color: var(--c-ink); color: var(--c-paper); }
.btn-ec--light { background: var(--c-paper); border-color: var(--c-paper); color: var(--c-ink); }
.btn-ec--light:hover { background: transparent; border-color: var(--c-paper); color: var(--c-paper); }
.btn-ec--sm { min-height: 40px; padding: .625rem 1.125rem; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-weight: var(--fw-medium);
  font-size: var(--fs-small);
  color: var(--c-ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-block: .5rem 2px;
}
.link-arrow__icon { transition: transform var(--dur-base) var(--ease); }
.link-arrow:hover .link-arrow__icon { transform: translateX(4px); }

.link-back {
  display: inline-flex;
  gap: .5rem;
  align-items: center;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--c-graphite);
  text-decoration: none;
  padding-block: .5rem;
}
.link-back:hover { color: var(--c-ink); }

/* ---- Header ------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  height: var(--header-h);
  background: var(--c-paper);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--c-rule); }
.site-header__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }

.brand {
  font-family: var(--ff-display);
  font-size: 1.375rem;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-ink);
  text-decoration: none;
  padding-block: .5rem;
}
.brand:hover { color: var(--c-ink); }

.nav-main { display: flex; align-items: center; gap: 2.25rem; list-style: none; margin: 0; padding: 0; }
.nav-main a:not(.btn-ec) {
  position: relative;
  display: inline-block;
  padding-block: .625rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--c-graphite);
  text-decoration: none;
}
.nav-main a:not(.btn-ec)::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease);
}
.nav-main a:not(.btn-ec):hover { color: var(--c-ink); }
.nav-main a:not(.btn-ec):hover::after,
.nav-main a[aria-current="page"]::after { transform: scaleX(1); }
.nav-main a[aria-current="page"] { color: var(--c-ink); }
.nav-main .btn-ec[aria-current="page"] { background: var(--c-ink); color: var(--c-paper); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: .625rem;
  min-height: 44px;
  padding: .5rem 0 .5rem .75rem;
  background: none;
  border: 0;
  font: var(--fw-medium) var(--fs-small) var(--ff-body);
  color: var(--c-ink);
  cursor: pointer;
}
.nav-toggle__bars { width: 20px; height: 8px; display: inline-flex; flex-direction: column; justify-content: space-between; }
.nav-toggle__bars span { display: block; height: 1.5px; background: currentColor; }
.nav-toggle__x { font-size: 1.375rem; line-height: 1; }

@media (max-width: 991.98px) {
  .site-nav { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* ---- Mobile menu -------------------------------------------------------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 1050;
  display: flex;
  flex-direction: column;
  background: var(--c-paper);
  overflow-y: auto;
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease), visibility 0s linear var(--dur-base);
}
.mobile-menu.is-open { visibility: visible; opacity: 1; transition: opacity var(--dur-base) var(--ease); }
.mobile-menu__head {
  flex: none;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--gutter-x);
  border-bottom: var(--border);
}
.nav-toggle--close { display: inline-flex; }
.mobile-menu__list { list-style: none; margin: 0; padding: var(--s-7) var(--gutter-x) 0; }
.mobile-menu__list li {
  border-bottom: var(--border);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
}
.mobile-menu.is-open .mobile-menu__list li { opacity: 1; transform: none; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(2) { transition-delay: 40ms; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(3) { transition-delay: 80ms; }
.mobile-menu.is-open .mobile-menu__list li:nth-child(4) { transition-delay: 120ms; }
.mobile-menu__list a {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.125rem 0;
  font-family: var(--ff-display);
  font-size: clamp(2rem, 1.5rem + 2.5vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-ink);
  text-decoration: none;
}
.mobile-menu__list a[aria-current="page"] { color: var(--c-accent); }
.mobile-menu__num {
  width: 1.75rem;
  flex: none;
  font-family: var(--ff-body);
  font-size: var(--fs-label);
  letter-spacing: var(--tracking-label);
  color: var(--c-muted);
}
.mobile-menu__foot {
  margin-top: auto;
  display: grid;
  gap: .375rem;
  padding: var(--s-7) var(--gutter-x);
  font-size: var(--fs-small);
}
.mobile-menu__foot .label { margin-bottom: .25rem; }
body.menu-open { overflow: hidden; }

/* ---- Status dot --------------------------------------------------------- */
.status-dot {
  display: inline-block;
  width: 8px; height: 8px;
  margin-right: .5rem;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px var(--c-accent-tint);
  vertical-align: 1px;
}

/* ---- Project card ------------------------------------------------------- */
.project-card__link { display: block; color: inherit; text-decoration: none; }
.project-card__link:hover { color: inherit; }
.project-card__media { overflow: hidden; border-radius: var(--radius-2); background: var(--c-paper-deep); }
.project-card__media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}
.project-card:hover .project-card__media img { transform: scale(1.025); }
.project-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-top: var(--s-5);
  padding-bottom: var(--s-3);
  border-bottom: var(--border);
}
.project-card__title { display: flex; align-items: baseline; gap: .875rem; }
.project-card__index {
  font-size: var(--fs-label);
  font-weight: var(--fw-semi);
  letter-spacing: var(--tracking-label);
  color: var(--c-muted);
}
.project-card h3 {
  background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size var(--dur-base) var(--ease);
}
.project-card:hover h3,
.project-card__link:focus-visible h3 { background-size: 100% 1px; }
.project-card__desc { margin-top: var(--s-4); max-width: 34rem; }
.project-card__disciplines { margin-top: var(--s-3); font-size: var(--fs-small); color: var(--c-muted); }

/* ---- Meta list (Work rows) ---------------------------------------------- */
.meta-list {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: .5rem 1rem;
  margin: var(--s-6) 0 var(--s-6);
  font-size: var(--fs-small);
}
.meta-list dt { color: var(--c-muted); font-weight: var(--fw-medium); }
.meta-list dd { color: var(--c-ink); }

/* ---- Closing contact band ----------------------------------------------- */
.cta-band {
  background: var(--c-ink);
  color: var(--c-on-ink-muted);
  padding-block: var(--section-y);
}
.cta-band .label { color: var(--c-on-ink-muted); }
.cta-band__title {
  margin-top: var(--s-4);
  max-width: 18ch;
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  color: var(--c-on-ink);
}
.cta-band__text { margin-bottom: var(--s-5); max-width: 30rem; }
.cta-band__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-5); }
.cta-band__email {
  font-family: var(--ff-display);
  font-size: var(--fs-h3);
  color: var(--c-on-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--c-on-ink-rule);
  padding-bottom: .25rem;
  transition: border-color var(--dur-fast) var(--ease);
  overflow-wrap: anywhere;
}
.cta-band__email:hover { color: var(--c-on-ink); border-bottom-color: var(--c-on-ink); }
.cta-band :focus-visible { box-shadow: 0 0 0 3px var(--c-ink), 0 0 0 5px var(--c-on-ink); }

/* ---- Forms -------------------------------------------------------------- */
.field { margin-bottom: var(--s-5); }
.field label {
  display: block;
  margin-bottom: .5rem;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--c-ink);
}
.field input,
.field textarea {
  display: block;
  width: 100%;
  padding: .875rem 1rem;
  background: var(--c-white);
  border: 1px solid var(--c-rule-strong);
  border-radius: var(--radius-1);
  font: var(--fs-body)/1.4 var(--ff-body);
  color: var(--c-ink);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
  -webkit-appearance: none;
  appearance: none;
}
.field textarea { min-height: 11rem; resize: vertical; line-height: 1.55; }
.field input:hover, .field textarea:hover { border-color: var(--c-graphite); }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px var(--c-accent-tint);
}
.field.has-error input, .field.has-error textarea { border-color: var(--c-error); }
.field.has-error input:focus, .field.has-error textarea:focus { box-shadow: 0 0 0 3px var(--c-error-tint); }
.field-error {
  display: flex;
  align-items: flex-start;
  gap: .5rem;
  margin-top: .5rem;
  font-size: var(--fs-small);
  line-height: 1.45;
  color: var(--c-error);
}
.field-error svg { flex: none; margin-top: .2rem; }
.form-note { font-size: var(--fs-small); color: var(--c-muted); max-width: 22rem; }

.alert-ec {
  margin-bottom: var(--s-5);
  padding: var(--s-4) var(--s-5);
  border: 1px solid;
  border-radius: var(--radius-1);
  font-size: var(--fs-small);
}
.alert-ec:focus { outline: none; }
.alert-ec--error { border-color: var(--c-error); background: var(--c-error-tint); color: var(--c-error); }

.hp-field { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.success-panel {
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  background: var(--c-success-tint);
  border: 1px solid var(--c-accent);
  border-radius: var(--radius-2);
}
.success-panel__label { color: var(--c-accent); }
.success-panel__title { margin: var(--s-3) 0 var(--s-4); font-size: var(--fs-h3); }
.success-panel__title:focus { outline: none; }
.success-panel p { margin-bottom: var(--s-5); }

/* Spinner for the sending state */
.btn-ec .spinner {
  width: 14px; height: 14px;
  border: 1.5px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Footer ------------------------------------------------------------- */
.site-footer { padding-block: var(--s-8) var(--s-6); font-size: var(--fs-small); border-top: var(--border); }.site-footer__top {
  display: grid;
  gap: var(--s-6);
  padding-bottom: var(--s-7);
}
@media (min-width: 768px) {
  .site-footer__top { grid-template-columns: 5fr 3fr 4fr; }
}
.site-footer__role { margin-top: var(--s-3); color: var(--c-muted); line-height: 1.6; }
.site-footer__nav { list-style: none; margin: 0; padding: 0; display: grid; gap: .25rem; }
.site-footer__nav a { color: var(--c-graphite); text-decoration: none; display: inline-block; padding-block: .25rem; }
.site-footer__nav a:hover { color: var(--c-ink); text-decoration: underline; }
.site-footer__contact { display: grid; gap: .5rem; align-content: start; }
.site-footer__contact a { font-family: var(--ff-display); font-size: 1.25rem; text-decoration: none; overflow-wrap: anywhere; }
.site-footer__contact a:hover { text-decoration: underline; }
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: var(--s-5);
  border-top: var(--border);
  color: var(--c-muted);
}
.site-footer__top-link { color: var(--c-muted); text-decoration: none; }
.site-footer__top-link:hover { color: var(--c-ink); }