/* ==========================================================================
   IACRT — shared stylesheet
   ========================================================================== */

:root{
  --color-navy-900: #0f1e33;
  --color-navy-800: #16294a;
  --color-navy-700: #1d3560;
  --color-navy-600: #2a477f;
  --color-navy-100: #e7ecf3;
  --color-navy-50:  #f3f6fa;

  --color-accent: #7a2e2e;      /* oxblood */
  --color-accent-dark: #5c2020;

  --color-ink: #1a1a1a;
  --color-ink-soft: #3d3d3d;
  --color-line: #d4d8de;
  --color-line-strong: #aeb4bd;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f7f5;
  --color-focus: #1a73c1;

  --font-head: "Source Serif 4", "Spectral", Georgia, "Times New Roman", serif;
  --font-body: "Source Sans 3", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;

  --measure: 68ch;
  --radius: 2px;
}

*, *::before, *::after{ box-sizing: border-box; }

html{ -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-bg);
}

img{ max-width: 100%; display: block; }

h1, h2, h3, h4{
  font-family: var(--font-head);
  color: var(--color-navy-900);
  line-height: 1.2;
  font-weight: 600;
  margin: 0 0 0.6em;
}

h1{ font-size: clamp(1.9rem, 1.5rem + 1.6vw, 2.75rem); }
h2{ font-size: clamp(1.5rem, 1.3rem + 0.8vw, 2rem); margin-top: 2.2em; }
h3{ font-size: 1.25rem; margin-top: 1.8em; }
h4{ font-size: 1.05rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-navy-700); }

p{ margin: 0 0 1.1em; max-width: var(--measure); }
ul, ol{ max-width: var(--measure); padding-left: 1.4em; margin: 0 0 1.1em; }
li{ margin-bottom: 0.4em; }

a{ color: var(--color-navy-700); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover{ color: var(--color-accent); }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible{
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---- Skip link ---- */
.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-navy-900);
  color: #fff;
  padding: 0.75em 1.25em;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus{ left: 0; }

/* ---- Layout helpers ---- */
.wrap{
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}
@media (min-width: 640px){ .wrap{ padding-inline: 2rem; } }

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

/* ==========================================================================
   Identity band / header
   ========================================================================== */

.site-header{
  border-bottom: 3px solid var(--color-navy-900);
  background: var(--color-bg);
}

.identity-band{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.9rem;
  flex-wrap: wrap;
}

.brand{
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-navy-900);
}
.brand:hover{ color: var(--color-navy-900); }

.brand-mark{
  width: 46px; height: 46px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--color-navy-900);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

/* Height-constrained so any logo variant works: the square mark stays square,
   and a wide lockup keeps its aspect ratio instead of being squashed. */
/* Height-constrained with automatic width, so the square mark stays square and
   the wide lockup keeps its aspect ratio instead of being squashed. */
.brand-logo{
  height: 54px;
  width: auto;
  max-width: 280px;
  flex: 0 0 auto;
  object-fit: contain;
}
@media (max-width: 640px){
  .brand-logo{ height: 44px; }
}

.brand-text{ line-height: 1.25; }
.brand-name{
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-navy-900);
}
.brand-tagline{
  display: block;
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  font-style: italic;
}

.header-utility{
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.9rem;
}
.member-login{
  white-space: nowrap;
  border: 1px solid var(--color-navy-700);
  padding: 0.4em 0.9em;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-navy-800);
}
.member-login:hover{
  background: var(--color-navy-900);
  color: #fff;
  border-color: var(--color-navy-900);
}

/* ---- Primary nav ---- */
.nav-toggle{
  display: none;
  background: none;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius);
  padding: 0.45em 0.7em;
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--color-navy-900);
  cursor: pointer;
}

.primary-nav{
  background: var(--color-navy-900);
}
.primary-nav .wrap{ padding-block: 0; }

.nav-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
}
.nav-list a{
  display: block;
  padding: 0.85em 1em;
  color: #eef1f6;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-bottom: 3px solid transparent;
}
.nav-list a:hover,
.nav-list a[aria-current="page"]{
  color: #fff;
  border-bottom-color: var(--color-accent);
  background: var(--color-navy-800);
}

@media (max-width: 899px){
  .nav-toggle{ display: inline-block; }
  .primary-nav{ display: none; }
  .primary-nav.is-open{ display: block; }
  .nav-list{ flex-direction: column; }
  .nav-list a{ padding: 0.9em 1.25rem; border-bottom: 1px solid var(--color-navy-800); }
}

/* ==========================================================================
   Page header (interior pages)
   ========================================================================== */

.page-header{
  background: var(--color-navy-50);
  border-bottom: 1px solid var(--color-line);
  padding-block: 2.2rem;
}
.page-header h1{ margin-bottom: 0.3em; }
.page-kicker{
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--color-accent-dark);
  font-weight: 700;
  margin-bottom: 0.6em;
  display: block;
}
.page-lede{
  font-size: 1.1rem;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.breadcrumbs{
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  margin-bottom: 0.75rem;
}
.breadcrumbs a{ color: var(--color-ink-soft); }
.breadcrumbs ol{ list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.35em; }
.breadcrumbs li:not(:last-child)::after{ content: "›"; margin-left: 0.35em; color: var(--color-line-strong); }

/* ==========================================================================
   Main content
   ========================================================================== */

main{ padding-block: 2.5rem 4rem; }

.section{ margin-bottom: 3rem; }
.section:last-child{ margin-bottom: 0; }

.two-col{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}
@media (min-width: 900px){
  .two-col{ grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); }
}

.content-col > *:last-child{ margin-bottom: 0; }

/* ---- Sidebar / on-page nav ---- */
.page-nav{
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
}
.page-nav h2{
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  margin: 0 0 0.75em;
  color: var(--color-navy-700);
}
.page-nav ul{ list-style: none; padding: 0; margin: 0; max-width: none; }
.page-nav li{ margin-bottom: 0.5em; }
.page-nav a{ text-decoration: none; font-size: 0.95rem; }
.page-nav a:hover{ text-decoration: underline; }

aside .callout{ margin-top: 1.5rem; }

/* ---- Callout / notice boxes ---- */
.callout{
  border-left: 4px solid var(--color-navy-700);
  background: var(--color-navy-50);
  padding: 1.1rem 1.3rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.callout p:last-child{ margin-bottom: 0; }
.callout.accent{ border-left-color: var(--color-accent); background: #f8efec; }

/* ---- Tables ---- */
.table-wrap{ overflow-x: auto; margin-bottom: 1.5rem; }
table{
  border-collapse: collapse;
  width: 100%;
  min-width: 560px;
  font-size: 0.95rem;
}
caption{
  text-align: left;
  font-weight: 600;
  margin-bottom: 0.6em;
  color: var(--color-navy-800);
}
th, td{
  border: 1px solid var(--color-line);
  padding: 0.65em 0.85em;
  text-align: left;
  vertical-align: top;
}
thead th{
  background: var(--color-navy-900);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 600;
}
tbody tr:nth-child(even){ background: var(--color-bg-alt); }
td[data-yes]::before{ content: "✓ "; color: var(--color-navy-700); font-weight: 700; }
td[data-no]::before{ content: "— "; color: var(--color-line-strong); }

/* ---- Listing blocks (events / news) ---- */
.listing{ list-style: none; padding: 0; margin: 0; max-width: none; }
.listing-item{
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1.25rem;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--color-line);
}
.listing-item:first-child{ border-top: 1px solid var(--color-line); }

/* Empty state has no date cell, so it must span the full width rather than
   being squeezed into the narrow date column. */
.listing-item.is-empty{
  grid-template-columns: 1fr;
  color: var(--color-ink-soft);
}
.listing-date{
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--color-navy-800);
  font-size: 0.95rem;
  line-height: 1.3;
}
.listing-date .year{ display:block; font-size: 0.78rem; font-weight: 400; color: var(--color-ink-soft); }
.listing-body h3{ margin: 0 0 0.3em; font-size: 1.05rem; }
.listing-meta{ font-size: 0.85rem; color: var(--color-ink-soft); margin-bottom: 0.35em; }
.listing-meta span:not(:last-child)::after{ content: "·"; margin: 0 0.5em; color: var(--color-line-strong); }
.listing-body p:last-child{ margin-bottom: 0; }

@media (max-width: 640px){
  .listing-item{ grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---- Homepage-specific ---- */
.mission-band{
  background: var(--color-navy-50);
  padding-block: 2.75rem;
  border-bottom: 1px solid var(--color-line);
}
.mission-band p{
  font-size: 1.15rem;
  font-family: var(--font-head);
  color: var(--color-navy-900);
  max-width: 72ch;
}

.home-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}
@media (min-width: 900px){
  .home-grid{ grid-template-columns: 1fr 1fr; }
}

.section-heading-row{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 2px solid var(--color-navy-900);
  padding-bottom: 0.3rem;
  margin-bottom: 0.25rem;
}
.section-heading-row h2{ margin: 0; }
.section-heading-row a{ font-size: 0.88rem; white-space: nowrap; }

.join-band{
  background: var(--color-navy-900);
  color: #eef1f6;
  padding-block: 3rem;
}
.join-band h2{ color: #fff; }
.join-band p{ color: #d7deea; max-width: 78ch; }
.join-band .eligible-list{
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  margin: 1.5rem 0;
  max-width: none;
}
@media (min-width: 640px){
  .join-band .eligible-list{ grid-template-columns: 1fr 1fr; }
}
.join-band .eligible-list li{
  border: 1px solid var(--color-navy-600);
  padding: 0.7em 1em;
  border-radius: var(--radius);
  margin: 0;
}
.btn{
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 0.7em 1.4em;
  text-decoration: none;
  font-weight: 700;
  border-radius: var(--radius);
  border: 1px solid var(--color-accent);
}
.btn:hover{ background: var(--color-accent-dark); color: #fff; border-color: var(--color-accent-dark); }
.btn.btn-outline{
  background: transparent;
  border-color: #cfd7e3;
  color: #eef1f6;
}
.btn.btn-outline:hover{ background: rgba(255,255,255,0.1); color: #fff; }

.figure-doc{
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-soft);
  font-size: 0.85rem;
  text-align: center;
  padding: 1rem;
}

/* ---- Definition-style lists (governance, membership categories) ---- */
.def-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: none;
}
@media (min-width: 640px){
  .def-grid{ grid-template-columns: 1fr 1fr; }
}
.def-card{
  border: 1px solid var(--color-line);
  padding: 1.3rem 1.4rem;
  border-radius: var(--radius);
}
.def-card h3{ margin-top: 0; }

/* ---- Forms ---- */
.form-stub{
  border: 1px solid var(--color-line);
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  max-width: 640px;
}
.form-row{ margin-bottom: 1.2rem; }
.form-row label{
  display: block;
  font-weight: 600;
  margin-bottom: 0.35em;
  font-size: 0.95rem;
}
.form-row .hint{ font-size: 0.82rem; color: var(--color-ink-soft); margin-top: 0.3em; }
.form-row input[type="text"],
.form-row input[type="email"],
.form-row select,
.form-row textarea{
  width: 100%;
  padding: 0.6em 0.75em;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  background: #fff;
}
.form-row textarea{ min-height: 7em; resize: vertical; }
fieldset{ border: 1px solid var(--color-line-strong); border-radius: var(--radius); padding: 0.9em 1.1em; margin: 0 0 1.2rem; }
legend{ font-weight: 600; padding: 0 0.4em; }
.form-actions{ display: flex; gap: 1rem; align-items: center; }
.required{ color: var(--color-accent-dark); }

/* ---- Ordered steps ---- */
.steps{ list-style: none; padding: 0; counter-reset: step; max-width: none; }
.steps li{
  counter-increment: step;
  position: relative;
  padding-left: 3rem;
  margin-bottom: 1.4rem;
}
.steps li::before{
  content: counter(step);
  position: absolute;
  left: 0; top: -0.1em;
  width: 2.1rem; height: 2.1rem;
  background: var(--color-navy-900);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-weight: 700;
}
.steps h3{ margin: 0 0 0.25em; font-size: 1.05rem; }
.steps p{ margin-bottom: 0; }

/* ---- Tags ---- */
.tag{
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 700;
  padding: 0.25em 0.6em;
  border: 1px solid var(--color-navy-700);
  color: var(--color-navy-800);
  border-radius: 999px;
  margin-right: 0.4em;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer{
  background: var(--color-navy-900);
  color: #c7d0de;
  padding-block: 3rem 2rem;
  margin-top: 3rem;
}
.site-footer a{ color: #d7deea; }
.site-footer a:hover{ color: #fff; }

.footer-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 640px){
  .footer-grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px){
  .footer-grid{ grid-template-columns: repeat(4, 1fr); }
}

.footer-col h2{
  font-family: var(--font-body);
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.07em;
  color: #93a1b8;
  margin-bottom: 0.9em;
}
.footer-col ul{ list-style: none; padding: 0; margin: 0; max-width: none; }
.footer-col li{ margin-bottom: 0.55em; font-size: 0.92rem; }

.footer-address{ font-style: normal; font-size: 0.92rem; line-height: 1.6; }

.footer-social{ display: flex; gap: 1rem; list-style: none; padding: 0; margin: 0 0 0; max-width: none; }

.footer-bottom{
  border-top: 1px solid var(--color-navy-700);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.82rem;
  color: #93a1b8;
}
.footer-bottom ul{ list-style: none; display: flex; gap: 1.25rem; padding: 0; margin: 0; flex-wrap: wrap; max-width: none; }

/* ==========================================================================
   Photography
   ========================================================================== */

.doc-photo{
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border: 1px solid var(--color-line);
  filter: grayscale(35%) contrast(1.04);
  background: var(--color-bg-alt);
}
.doc-photo.tall{ aspect-ratio: 4/5; }
.doc-photo.wide{ aspect-ratio: 21/9; }

figure.photo{ margin: 0 0 1.5rem; }
figure.photo figcaption{
  font-size: 0.82rem;
  color: var(--color-ink-soft);
  margin-top: 0.5em;
  font-style: italic;
}

.hero-band{
  position: relative;
  background: var(--color-navy-900);
  color: #eef1f6;
  overflow: hidden;
}
.hero-band .doc-photo{
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  position: absolute;
  inset: 0;
  filter: grayscale(55%) contrast(1.05) brightness(0.55);
  border: none;
}
.hero-band-inner{
  position: relative;
  z-index: 1;
  padding-block: 2.5rem;
}
.hero-band-inner p{ color: #eef1f6; }

.photo-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  max-width: none;
  margin: 1.5rem 0;
}
@media (min-width: 640px){
  .photo-grid{ grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   Flash messages
   ========================================================================== */

.flash{
  border-radius: var(--radius);
  padding: 0.9rem 1.2rem;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}
.flash-success{ background: #eaf3ec; border: 1px solid #a9cdb2; color: #1f4a2a; }
.flash-error{ background: #f8eaea; border: 1px solid #d9a8a8; color: #6b2020; }

/* ==========================================================================
   Directory
   ========================================================================== */

.directory-filters{
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  padding: 1.2rem 1.4rem;
  border-radius: var(--radius);
  margin-bottom: 2rem;
}
.directory-filters .form-row{ margin-bottom: 0; flex: 1 1 200px; }
.directory-filters .form-actions{ flex: 0 0 auto; }

.member-card{
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1rem;
}
.member-card h3{ margin: 0 0 0.2em; }
.member-card .listing-meta{ margin-bottom: 0.5em; }
.member-card p:last-child{ margin-bottom: 0; }