:root {
  /* Color — identity */
  --color-primary: #B3122F;
  --color-primary-dark: #8E0F25;
  --color-primary-soft: #F6D6DB;

  --color-structure: #1F2A44;
  --color-structure-dark: #162033;

  /* Color — content domain accents */
  --color-theory: #5A4E9C;
  --color-theory-soft: #E6E3F4;

  --color-applied: #2F7F7A;
  --color-applied-soft: #D6ECEA;

  /* Color — neutrals */
  --color-text: #1A1A1A;
  --color-text-muted: #5C5C5C;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F4F6F8;
  --color-line: #E2E6EA;

  /* Typography */
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system,
               BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Spacing — 4-based scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 72px;

  /* Radius */
  --radius-sm: 8px;
  --radius: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  /* Shadow */
  --shadow: 0 10px 30px rgba(31, 42, 68, 0.08);

  /* Layout */
  --max-width: 1180px;
}
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover,
a:focus-visible {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

h1, h2, h3 {
  color: var(--color-structure);
  margin: 0 0 var(--space-4);
  font-weight: 700;
  line-height: 1.1;
}

h1, .h1 {
  font-size: clamp(1.8rem, 2.5vw, 2.6rem);
  letter-spacing: -0.03em;
}

h2, .h2 {
  font-size: 1.5rem;
  line-height: 1.2;
}

h3, .h3 {
  font-size: 1.15rem;
  line-height: 1.25;
}

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

.display {
  font-size: clamp(2.5rem, 4vw, 4.7rem);
  line-height: 1.03;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-structure);
  margin: 0 0 var(--space-5);
}

.lead {
  font-size: 1.08rem;
  color: var(--color-text-muted);
}

.muted { color: var(--color-text-muted); }

.small { font-size: 0.88rem; line-height: 1.4; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: var(--space-4);
}

.eyebrow::before {
  content: "";
  width: 40px;
  height: 2px;
  background: var(--color-primary);
  display: inline-block;
}
/* Container */
.container {
  width: min(var(--max-width), calc(100% - 48px));
  margin: 0 auto;
}

/* Section */
.section {
  padding: var(--space-8) 0;
}

.section-tight {
  padding: var(--space-7) 0;
}

.surface-white {
  background: #fff;
}

.surface-muted {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.section-muted {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

/* Merge muted band with the muted hero above — no divider, collapse seam padding */
.mission-hero + .section-muted,
.about-hero + .section-muted {
  border-top: none;
  padding-top: 0;
}

.section-dark {
  background: var(--color-structure);
  color: rgba(255, 255, 255, 0.88);
}
.section-dark h1,
.section-dark h2,
.section-dark h3 { color: #fff; }
.section-dark .muted { color: rgba(255, 255, 255, 0.7); }

.section-header {
  margin-bottom: var(--space-6);
}

.section-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.section-header-row h2 { margin: 0; }

/* Home — mission hero (scholarly, text-first, not a slider) */
.mission-hero {
  padding: var(--space-8) 0 var(--space-7);
  background: var(--color-bg-soft);
}
.mission-hero .lead { font-size: 1.15rem; }
.mission-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

/* About page */
.about-hero {
  padding: var(--space-8) 0 var(--space-7);
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-line);
}
.about-page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: var(--space-7);
  align-items: start;
}
.about-fields {
  font-size: 1.08rem;
  color: var(--color-text-muted);
  padding-left: 1.2rem;
  margin: 0 0 var(--space-5);
}
.about-fields li {
  margin-bottom: var(--space-2);
}
.about-page-main h2 {
  margin-top: 0;
  margin-bottom: var(--space-4);
}
.about-page-main h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}
.about-page-main ul {
  padding-left: 1.2rem;
  margin: 0 0 var(--space-5);
}
.about-page-main li {
  margin-bottom: var(--space-2);
}
.about-page-side {
  position: sticky;
  top: 104px;
}
.about-table-wrap {
  overflow-x: auto;
}
.about-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}
.about-table col:first-child {
  width: 52%;
}
.about-table col:last-child {
  width: 48%;
}
.about-table th,
.about-table td {
  padding: var(--space-4) 0;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(31, 42, 68, 0.12);
}
.about-table th:first-child,
.about-table td:first-child {
  padding-right: var(--space-6);
}
.about-table th {
  color: var(--color-structure);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.about-table td {
  color: var(--color-text);
  line-height: 1.5;
}
.about-table tbody tr:last-child td {
  border-bottom: 0;
}
@media (max-width: 720px) {
  .about-table {
    min-width: 38rem;
  }
}

/* Contact page */
.contact-secretary-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-structure);
  margin-bottom: var(--space-1);
}
.contact-secretary-affil {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.contact-details {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--space-2) var(--space-5);
  margin: 0;
}
.contact-details dt {
  font-weight: 600;
  color: var(--color-structure);
  font-size: 0.875rem;
}
.contact-details dd {
  margin: 0;
  color: var(--color-text);
  font-size: 0.875rem;
}
.contact-details address {
  font-style: normal;
  white-space: pre-line;
}

/* About — officer cards */
.officer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-7);
}
.officer-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-soft);
}
.officer-card .officer-role {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 var(--space-2);
}
.officer-card .officer-name {
  font-weight: 600;
  color: var(--color-structure);
  margin: 0 0 var(--space-1);
}
.officer-card .officer-affil {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* About — members-at-large list */
.members-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3) var(--space-5);
}
.member-item .member-name {
  font-weight: 500;
  color: var(--color-structure);
  margin: 0 0 2px;
}
.member-item .member-affil {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
}

@media (max-width: 900px) {
  .officer-grid { grid-template-columns: repeat(2, 1fr); }
  .members-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .officer-grid { grid-template-columns: 1fr; }
  .members-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Home — annual conference spotlight */
.spotlight {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow);
}
.spotlight-eyebrow {
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin-bottom: var(--space-3);
}
.spotlight h2 {
  font-size: clamp(1.35rem, 1.8vw, 1.75rem);
  line-height: 1.15;
  margin-bottom: var(--space-2);
}
.spotlight-subtitle,
.event-subtitle {
  font-style: italic;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4);
  font-size: 1.05rem;
}
.event-subtitle { margin-top: calc(-1 * var(--space-3)); }
.spotlight-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--space-4);
}
.spotlight-meta strong { color: var(--color-structure); font-weight: 600; }
.spotlight-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.spotlight-banner {
  display: block;
  margin: 0 calc(-1 * var(--space-6)) var(--space-5);
  border-bottom: 1px solid var(--color-line);
  overflow: hidden;
  background: var(--color-bg-soft);
}
.spotlight-banner:first-child {
  margin-top: calc(-1 * var(--space-6));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.spotlight-banner img {
  display: block;
  width: 100%;
  height: auto;
}

/* Home — events grid */
.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

.event-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-5);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.event-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.event-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}
.event-card h3 {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.25;
}
.event-card h3 a { color: var(--color-structure); }
.event-card h3 a:hover { color: var(--color-primary); text-decoration: none; }
.event-card-summary { color: var(--color-text-muted); margin: 0; font-size: 0.95rem; }

/* Home — about strip */
.about-strip {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-7);
  align-items: center;
}
.about-strip p { max-width: 60ch; }

/* Home — membership CTA */
.membership-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-5);
  background: var(--color-applied-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-7);
}
.membership-cta > div { flex: 1 1 300px; min-width: 0; }
.membership-cta h2 {
  margin: 0 0 var(--space-1);
  color: var(--color-structure);
  font-size: 1.3rem;
}
.membership-cta p { margin: 0; color: var(--color-structure); }

@media (max-width: 820px) {
  .mission-hero-grid {
    grid-template-columns: 1fr;
  }
  .about-page-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .about-page-side {
    position: static;
  }
  .about-strip { grid-template-columns: 1fr; gap: var(--space-5); }
  .spotlight { padding: var(--space-6); }
  .spotlight-banner { margin-left: calc(-1 * var(--space-6)); margin-right: calc(-1 * var(--space-6)); }
  .spotlight-banner:first-child { margin-top: calc(-1 * var(--space-6)); }
  .membership-cta { padding: var(--space-5); }
}

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-5);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease,
              border-color 0.18s ease, color 0.18s ease;
  text-decoration: none;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-primary-dark);
  color: #fff;
}

.btn-secondary {
  color: var(--color-applied);
  border-color: var(--color-applied);
  background: #fff;
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--color-applied-soft);
  color: var(--color-applied);
}

/* Pill */
.pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.pill-theory {
  color: var(--color-theory);
  background: var(--color-theory-soft);
}

.pill-applied {
  color: var(--color-applied);
  background: var(--color-applied-soft);
}

.pill-event {
  color: var(--color-structure);
  background: #E8EEF8;
}

.pill-report {
  color: var(--color-structure);
  background: var(--color-bg-soft);
  border: 1px solid var(--color-line);
}

/* Card */
.card {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-5);
  box-shadow: var(--shadow);
}
.card-banner {
  display: block;
  max-width: 360px;
  margin: 0 0 var(--space-3);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg-soft);
}
.card-banner img {
  display: block;
  width: 100%;
  height: auto;
}

/* Event single — Materials block (labeled attachments list) */
.materials {
  margin: var(--space-7) 0 var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-line);
}
.materials-heading {
  font-size: 1.1rem;
  margin: 0 0 var(--space-3);
}
.materials-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.materials-item { margin: 0; }

.materials-figure {
  margin: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}
.materials-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.materials-figure figcaption {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--color-line);
  background: var(--color-bg-soft);
}

.materials-file {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  color: var(--color-text);
  text-decoration: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease,
              transform 0.18s ease;
}
.materials-file:hover,
.materials-file:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow);
  text-decoration: none;
  transform: translateY(-1px);
}
.materials-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-bg-soft);
  color: var(--color-structure);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}
.materials-label {
  flex: 1;
  color: var(--color-structure);
  font-weight: 600;
}
.materials-file:hover .materials-label,
.materials-file:focus-visible .materials-label {
  color: var(--color-primary);
}
.materials-size {
  white-space: nowrap;
}

/* Site header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  color: var(--color-structure);
}
.brand:hover { text-decoration: none; }

.brand-logo {
  display: inline-flex;
}
.brand-logo svg {
  display: block;
  height: 56px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  color: var(--color-structure);
  font-size: 0.96rem;
}

.nav-links a {
  color: var(--color-structure);
}
.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-primary);
  text-decoration: none;
}

/* Site footer */
.site-footer {
  background: var(--color-bg-soft);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-line);
}

.site-footer a {
  color: var(--color-structure);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--color-line);
}
.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-primary);
  text-decoration-color: var(--color-primary);
}

.site-footer .small { color: var(--color-text-muted); }
.site-footer .muted-on-dark { color: var(--color-text-muted); }

.footer-main {
  padding: var(--space-8) 0 var(--space-7);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
}

.footer-brand .small { margin-bottom: var(--space-2); max-width: 40ch; }

.footer-logo {
  display: inline-flex;
  margin-bottom: var(--space-4);
}
.footer-logo svg {
  display: block;
  height: 44px;
  width: auto;
}

.footer-heading {
  color: var(--color-structure);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 var(--space-4);
}

.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
  font-size: 0.95rem;
}

.footer-legal {
  background: transparent;
  border-top: 1px solid var(--color-line);
  padding: var(--space-4) 0;
}

.footer-legal-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 980px) {
  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-7) 0 var(--space-6);
  }
  .footer-legal-row { justify-content: flex-start; }
}

/* Responsive */
@media (max-width: 980px) {
  .site-footer .container {
    grid-template-columns: 1fr;
  }
  .footer-links { justify-content: flex-start; }
}

@media (max-width: 820px) {
  .site-header .container {
    flex-wrap: wrap;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }
  .nav-links {
    width: 100%;
    flex-wrap: wrap;
    gap: var(--space-3) var(--space-4);
  }
  .container {
    width: min(var(--max-width), calc(100% - 28px));
  }
}