/* Reusable components — header, nav, buttons, accordion, cards, footer, forms.
   Markup for header/footer is duplicated per page (no build step). */

/* ------------------------------------------------------------------- Buttons
   Pill buttons, Syne Mono. Indigo primary, outline secondary. */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1;
  letter-spacing: 0.01em;
  text-decoration: none;
  padding: 1.05rem 1.9rem;
  border-radius: var(--radius-pill);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
}
.btn__arrow { transition: transform var(--duration-fast) var(--ease-standard); }
.btn:hover .btn__arrow { transform: translateX(3px); }

.btn--primary { background: var(--color-accent); color: var(--color-on-accent); }
.btn--primary:hover { background: var(--color-accent-hover); color: var(--color-on-accent); }

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

.section--deep .btn--secondary { color: var(--color-surface); border-color: var(--color-border-on-dark); }
.section--deep .btn--secondary:hover { background: var(--color-surface); color: var(--color-ink); }

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

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-6);
}

.site-header__logo {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-ink);
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__links a {
  font-family: var(--font-mono);
  color: var(--color-ink);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-fast) var(--ease-standard);
}
.site-nav__links a:hover,
.site-nav__links a[aria-current] { border-bottom-color: var(--color-ink); color: var(--color-ink); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--color-ink);
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed;
    inset: 0;
    top: 65px;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-8);
    padding: var(--space-10) var(--space-8);
    transform: translateX(100%);
    transition: transform var(--duration-base) var(--ease-standard);
  }
  .site-nav[data-open="true"] { transform: translateX(0); }
  .site-nav__links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
    width: 100%;
  }
  .site-nav__links a { font-size: var(--text-base); }
}

/* ------------------------------------------------------------------ Accordion
   <details>/<summary> — accessible, works without JS. */
.accordion { border-top: 1px solid var(--color-line); }
.accordion__item { border-bottom: 1px solid var(--color-line); }
.accordion__item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-8) 0;
}
.accordion__item > summary::-webkit-details-marker { display: none; }
.accordion__item summary h3 {
  margin: 0;
  font-size: var(--text-xl);
  transition: color var(--duration-fast) var(--ease-standard);
}
.accordion__item:hover summary h3 { color: var(--color-accent); }
.accordion__sign {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-accent);
  flex: none;
  transition: transform var(--duration-base) var(--ease-standard);
}
.accordion__item[open] .accordion__sign { transform: rotate(45deg); }
.accordion__body {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
  max-width: 60ch;
  padding-bottom: var(--space-8);
}

/* ---------------------------------------------------------------------- Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  padding: var(--space-8);
  height: 100%;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
}

/* -------------------------------------------------------------------- Figures */
.figure { margin: 0; }
.figure img { width: 100%; height: auto; display: block; }
.figure figcaption {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-muted);
  margin-top: var(--space-3);
}

/* Labeled placeholder until a real image lands in /assets/img/. */
.media-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-8);
  background: color-mix(in srgb, var(--color-ink) 5%, var(--color-surface));
  border: 1px solid var(--color-line);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.03em;
  line-height: var(--leading-snug);
}
.media-placeholder::before {
  content: attr(data-label) " \00b7 ";
  color: var(--color-accent);
}

/* ---------------------------------------------------------------------- Footer */
.site-footer {
  background: var(--color-deep);
  color: var(--color-on-dark);
  padding-block: var(--space-20) var(--space-10);
}
.site-footer a { color: var(--color-on-dark); text-decoration: none; }
.site-footer a:hover { color: var(--color-surface); }

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  padding-bottom: var(--space-16);
}
@media (max-width: 760px) { .site-footer__grid { grid-template-columns: 1fr 1fr; } }

.site-footer__col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-on-dark-soft);
  margin-bottom: var(--space-6);
}
.site-footer__col ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}
.site-footer__logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-base);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-surface);
  margin-bottom: var(--space-4);
}
.site-footer__bottom {
  border-top: 1px solid var(--color-border-on-dark);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-on-dark-soft);
}

/* ----------------------------------------------------------------------- Forms */
.form-field { margin-bottom: var(--space-6); }
.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-2);
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  background: var(--color-surface);
  color: var(--color-ink);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* Netlify Forms honeypot */
.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px; height: 1px;
  overflow: hidden;
}