/* =====================================================================
   Summit Publisher — Landing Page Styles
   Academic publishing & scholarly communication
   Editorial / premium / minimal / accessible
   ===================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Palette — warm paper + deep forest green */
  --paper:        #FBFAF6;
  --paper-2:      #F4F1E9;
  --paper-3:      #EFEBDF;
  --ink:          #1A1A17;
  --ink-soft:     #3B3B36;
  --muted:        #6B6B62;
  --muted-2:      #8A8A7E;
  --line:         #E6E0D2;
  --line-soft:    #EFEBE0;

  --accent:       #1F4D3C;
  --accent-2:     #2A6B53;
  --accent-soft:  #E6EEEA;
  --accent-tint:  #F1F5F3;
  --gold:         #9A7B4F;
  --gold-soft:    #C9B894;

  --dark-bg:      #14201B;
  --dark-bg-2:    #0F1814;
  --dark-line:    #29443A;
  --dark-text:    #ECECE3;
  --dark-muted:   #9DB2A8;

  /* Typography */
  --font-serif:   "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, "URW Palladio L", P052, Georgia, serif;
  --font-sans:    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;

  /* Layout */
  --container:    1200px;
  --container-narrow: 920px;
  --gutter:       clamp(1.25rem, 4vw, 2.5rem);

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26,26,23,.04), 0 1px 1px rgba(26,26,23,.03);
  --shadow-md: 0 4px 16px rgba(26,26,23,.06), 0 2px 6px rgba(26,26,23,.04);
  --shadow-lg: 0 24px 60px rgba(26,26,23,.10), 0 8px 24px rgba(26,26,23,.06);
  --shadow-paper: 0 18px 40px rgba(26,26,23,.10), 0 4px 12px rgba(26,26,23,.05);

  /* Motion */
  --ease: cubic-bezier(.2,.7,.2,1);
  --dur:  .35s;

  /* Header height */
  --header-h: 76px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { list-style: none; }

/* ---------- Accessibility utilities ---------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 1000;
  background: var(--accent);
  color: #fff;
  padding: .7rem 1.1rem;
  border-radius: 0 0 var(--r-md) var(--r-md);
  font-size: .9rem;
  font-weight: 600;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(4rem, 8vw, 7rem);
  position: relative;
}
.section-tint { background: var(--paper-2); }
.section-dark {
  background: var(--dark-bg);
  color: var(--dark-text);
}

.section-head {
  max-width: 760px;
  margin-bottom: clamp(2.5rem, 5vw, 3.75rem);
}
.section-head.center { margin-inline: auto; text-align: center; }
.section-head-light .eyebrow,
.section-head-light .section-title,
.section-head-light .section-sub { color: var(--dark-text); }

.section-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.9rem, 4vw, 2.85rem);
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--ink);
}
.section-title-light { color: var(--dark-text) !important; }

.section-sub {
  margin-top: 1rem;
  font-size: 1.075rem;
  color: var(--muted);
  max-width: 60ch;
}
.section-sub-light { color: var(--dark-muted) !important; }

/* ---------- Eyebrow ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.eyebrow-light { color: var(--gold-soft); }
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.eyebrow-light .eyebrow-dot { background: var(--gold-soft); }

/* ---------- Buttons ---------- */
.btn {
  --btn-bg: var(--accent);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.25rem;
  font-family: var(--font-sans);
  font-size: .92rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .01em;
  border-radius: var(--r-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform .2s var(--ease),
              box-shadow var(--dur) var(--ease);
  white-space: nowrap;
  text-align: center;
}
.btn-icon { width: 1rem; height: 1rem; flex: none; }
.btn-lg { padding: .95rem 1.6rem; font-size: .98rem; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 1px 0 rgba(255,255,255,.12) inset, 0 2px 6px rgba(31,77,60,.18);
}
.btn-primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(31,77,60,.25);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 250, 246, .82);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled {
  background: rgba(251, 250, 246, .94);
  border-bottom-color: var(--line);
  box-shadow: 0 1px 0 rgba(26,26,23,.02);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: .04em;
  transition: opacity .2s var(--ease);
}
.brand:hover { opacity: .82; }
.brand-logo {
  display: block;
  width: 42px;
  height: 42px;
  object-fit: contain;
}
.brand-name {
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .09em;
}
.brand-logo-light { filter: brightness(0) invert(1); }
.brand-name-light { color: var(--dark-text); }

/* Nav */
.main-nav { margin-inline: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: .35rem;
}
.nav-link {
  display: inline-block;
  padding: .5rem .75rem;
  font-size: .9rem;
  font-weight: 500;
  color: var(--ink-soft);
  border-radius: var(--r-sm);
  position: relative;
  transition: color .2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: .75rem; right: .75rem;
  bottom: .35rem;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav-link:hover { color: var(--accent); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.is-active { color: var(--accent); }
.nav-link.is-active::after { transform: scaleX(1); }

.visit-grfe { flex: none; }

/* Hamburger */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--paper);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.nav-toggle:hover { border-color: var(--accent); }
.nav-toggle-bar {
  width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav */
.mobile-nav {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(86vw, 380px);
  background: var(--paper);
  border-left: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  transform: translateX(100%);
  transition: transform .35s var(--ease);
  padding: calc(var(--header-h) + 1rem) var(--gutter) 2rem;
  overflow-y: auto;
}
.mobile-nav.is-open { transform: translateX(0); }
.mobile-nav[hidden] { display: none; }

.mobile-nav-list { display: flex; flex-direction: column; gap: .25rem; }
.mobile-nav-list a {
  display: block;
  padding: .9rem .5rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--line-soft);
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}
.mobile-nav-list a:hover { color: var(--accent); padding-left: .85rem; }
.mobile-nav-list .btn {
  margin-top: 1.25rem;
  font-family: var(--font-sans);
  font-size: .95rem;
}

.mobile-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(26,26,23,.42);
  z-index: 190;
  opacity: 0;
  transition: opacity .35s var(--ease);
}
.mobile-backdrop.is-open { opacity: 1; }
.mobile-backdrop[hidden] { display: none; }

body.no-scroll { overflow: hidden; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(3rem, 7vw, 6rem);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%;
  background-position: center;
  opacity: .5;
  mask-image: linear-gradient(to bottom, transparent, #000 18%, #000 60%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 18%, #000 60%, transparent);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2.5rem, 6.5vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
.hero-title::first-letter { color: var(--accent); }

.lede {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 44ch;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-bottom: 2.25rem;
}

.hero-footnote {
  font-size: .92rem;
  color: var(--muted);
  max-width: 48ch;
  border-left: 2px solid var(--line);
  padding-left: 1rem;
}

/* Hero visual — stacked papers */
.hero-visual {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.paper-stack {
  position: relative;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 3 / 4;
}
.paper {
  position: absolute;
  inset: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-paper);
  padding: 1.6rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}
.paper-1 {
  z-index: 3;
  background: #fff;
}
.paper-2 {
  z-index: 2;
  transform: translate(16px, 14px) rotate(2.2deg);
  opacity: .9;
}
.paper-3 {
  z-index: 1;
  transform: translate(30px, 28px) rotate(4.5deg);
  opacity: .75;
}
.paper-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .5rem;
}
.paper-tag {
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
}
.paper-vol {
  font-size: .7rem;
  color: var(--muted-2);
  font-style: italic;
}
.paper-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  line-height: 1.18;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -.01em;
  margin-bottom: .25rem;
}
.paper-lines {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.paper-lines span {
  height: 6px;
  border-radius: 3px;
  background: var(--paper-3);
}
.paper-lines span:nth-child(1) { width: 92%; }
.paper-lines span:nth-child(2) { width: 100%; }
.paper-lines span:nth-child(3) { width: 78%; }
.paper-lines span:nth-child(4) { width: 60%; }
.paper-lines-short span:nth-child(1) { width: 55%; }
.paper-lines-short span:nth-child(2) { width: 40%; }
.paper-seal {
  position: absolute;
  right: 1.1rem;
  bottom: 1.1rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: .8rem;
  letter-spacing: .04em;
  box-shadow: 0 4px 12px rgba(31,77,60,.3);
}
.paper-spine {
  position: absolute;
  left: 0; top: 14%; bottom: 14%;
  width: 4px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
  opacity: .85;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.about-lead p { margin-bottom: 1.1rem; font-size: 1.075rem; color: var(--ink-soft); }
.about-lead p:last-child { margin-bottom: 0; }
.about-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.about-point {
  padding: 1.4rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}
.about-point:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.about-point h3 {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: .35rem;
  color: var(--ink);
}
.about-point p { font-size: .92rem; color: var(--muted); line-height: 1.55; }

/* ---------- Journal card ---------- */
.journal-card {
  display: grid;
  grid-template-columns: 1.4fr .9fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(1.75rem, 4vw, 3rem);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.journal-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}
.journal-meta {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.1rem;
  flex-wrap: wrap;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: .4rem .7rem;
  border-radius: 999px;
}
.pill-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.journal-short {
  font-family: var(--font-serif);
  font-size: .95rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .12em;
}
.journal-name {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--ink);
  margin-bottom: .85rem;
}
.journal-desc {
  font-size: 1.02rem;
  color: var(--ink-soft);
  margin-bottom: 1.25rem;
  max-width: 52ch;
}
.journal-fields {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.6rem;
}
.journal-fields span {
  font-size: .8rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding: .35rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
}

/* Journal cover (decorative) */
.journal-cover {
  aspect-ratio: 3 / 4;
  background: var(--accent);
  color: #fff;
  border-radius: var(--r-md);
  padding: 1.6rem 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.journal-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 10%, rgba(255,255,255,.08), transparent 50%),
    repeating-linear-gradient(45deg, rgba(255,255,255,.03) 0 1px, transparent 1px 14px);
  pointer-events: none;
}
.cover-top {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  position: relative;
}
.cover-mark {
  width: 38px; height: 38px;
  border: 1.5px solid var(--gold-soft);
  border-radius: var(--r-sm);
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: .82rem;
  color: var(--gold-soft);
}
.cover-label {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  opacity: .85;
  margin-top: .25rem;
}
.cover-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.3rem;
  line-height: 1.18;
  letter-spacing: -.005em;
  position: relative;
}
.cover-foot {
  display: flex;
  align-items: center;
  gap: .7rem;
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  opacity: .85;
  position: relative;
}
.cover-rule {
  flex: 1;
  height: 1px;
  background: var(--gold-soft);
  opacity: .6;
}

/* ---------- Feature cards ---------- */
.card-grid {
  display: grid;
  gap: 1.25rem;
}
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }
.feature-card {
  padding: 1.75rem 1.5rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
  display: flex;
  flex-direction: column;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.feature-icon {
  width: 52px; height: 52px;
  border-radius: var(--r-md);
  background: var(--accent-tint);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 1.25rem;
  transition: background-color .25s var(--ease), color .25s var(--ease);
}
.feature-icon svg { width: 28px; height: 28px; }
.feature-card:hover .feature-icon {
  background: var(--accent);
  color: #fff;
}
.feature-title {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: .5rem;
  line-height: 1.25;
}
.feature-text {
  font-size: .95rem;
  color: var(--muted);
  line-height: 1.55;
}
.card-note {
  margin-top: 1.75rem;
  text-align: center;
  font-size: .82rem;
  color: var(--muted-2);
  font-style: italic;
  max-width: 60ch;
  margin-inline: auto;
}
.card-note-light { color: var(--dark-muted); }

/* ---------- For Authors ---------- */
.authors-grid {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.authors-intro .section-sub { margin-bottom: 1.75rem; }
.authors-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.authors-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .85rem;
  padding: 1.1rem 1.1rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.authors-list li:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.authors-num {
  font-family: var(--font-serif);
  font-size: .85rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .05em;
  padding-top: .1rem;
}
.authors-list h3 {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: .2rem;
  line-height: 1.25;
}
.authors-list p { font-size: .86rem; color: var(--muted); line-height: 1.5; }

/* ---------- Split (Open Access) ---------- */
.split {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.split-visual { display: grid; place-items: center; }
.split-content p { margin-bottom: 1rem; color: var(--ink-soft); }
.split-content .btn { margin-top: .75rem; }

.oa-visual {
  position: relative;
  width: min(340px, 80%);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}
.oa-ring {
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 50%;
}
.oa-ring-1 { inset: 0; }
.oa-ring-2 { inset: 14%; border-color: var(--accent-soft); }
.oa-ring-3 { inset: 28%; border-color: var(--gold-soft); opacity: .6; }
.oa-core {
  width: 44%;
  height: 44%;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: .04em;
  box-shadow: 0 12px 30px rgba(31,77,60,.28);
  position: relative;
  z-index: 2;
}

/* ---------- Ethics ---------- */
.ethics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.ethics-card {
  padding: 1.5rem 1.35rem;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--dark-line);
  border-radius: var(--r-md);
  transition: background-color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.ethics-card:hover {
  background: rgba(255,255,255,.07);
  border-color: var(--gold-soft);
  transform: translateY(-2px);
}
.ethics-num {
  display: block;
  font-family: var(--font-serif);
  font-size: .82rem;
  font-weight: 600;
  color: var(--gold-soft);
  letter-spacing: .08em;
  margin-bottom: .6rem;
}
.ethics-card h3 {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--dark-text);
  margin-bottom: .4rem;
  line-height: 1.25;
}
.ethics-card p {
  font-size: .88rem;
  color: var(--dark-muted);
  line-height: 1.5;
}

/* ---------- Discovery ---------- */
.discovery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.discovery-card {
  padding: 1.75rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.discovery-card:not(.discovery-card-placeholder):hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.discovery-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.1rem;
}
.discovery-badge {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: .35rem .65rem;
  border-radius: 999px;
}
.discovery-badge-soon {
  color: var(--muted-2);
  background: var(--paper-3);
}
.discovery-short {
  font-family: var(--font-serif);
  font-size: .9rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .12em;
}
.discovery-name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: .6rem;
  line-height: 1.2;
}
.discovery-name-muted { color: var(--muted-2); }
.discovery-desc {
  font-size: .92rem;
  color: var(--muted);
  margin-bottom: 1.4rem;
  line-height: 1.55;
  flex: 1;
}
.discovery-soon-note {
  font-size: .82rem;
  color: var(--muted-2);
  font-style: italic;
  padding: .7rem 0;
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: var(--r-md);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.contact-list {
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
}
.contact-item {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}
.contact-item:first-child { padding-top: 0; }
.contact-key {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted-2);
}
.contact-val {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink);
}
.contact-val-placeholder {
  color: var(--muted-2);
  font-style: italic;
}
.contact-val-link {
  color: var(--accent);
  transition: color .2s var(--ease);
}
.contact-val-link:hover { color: var(--accent-2); text-decoration: underline; }
.contact-note {
  margin-top: 1.25rem;
  font-size: .82rem;
  color: var(--muted-2);
  font-style: italic;
}
.contact-cta-card {
  background: var(--accent);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.contact-cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(255,255,255,.1), transparent 45%);
  pointer-events: none;
}
.contact-cta-card h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: .75rem;
  position: relative;
}
.contact-cta-card p { font-size: .92rem; opacity: .9; margin-bottom: .85rem; line-height: 1.55; position: relative; }
.contact-cta-note { opacity: .75 !important; }
.contact-cta-card .btn { margin-top: 1rem; background: #fff; color: var(--accent); border-color: #fff; position: relative; }
.contact-cta-card .btn:hover { background: var(--paper-2); border-color: var(--paper-2); transform: translateY(-1px); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--dark-bg-2);
  color: var(--dark-text);
  padding-top: clamp(3rem, 6vw, 4.5rem);
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr .9fr .6fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--dark-line);
}
.footer-brand .brand { color: var(--dark-text); }
.footer-brand .brand:hover { opacity: .9; }
.footer-tagline {
  margin-top: 1rem;
  font-size: .92rem;
  color: var(--dark-muted);
  max-width: 32ch;
  line-height: 1.55;
}
.footer-heading {
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 1rem;
}
.footer-list { display: flex; flex-direction: column; gap: .55rem; }
.footer-list a {
  font-size: .92rem;
  color: var(--dark-muted);
  transition: color .2s var(--ease);
}
.footer-list a:hover { color: var(--dark-text); }
.footer-short {
  margin-top: .85rem;
  font-size: .82rem;
  color: var(--dark-muted);
  line-height: 1.5;
  max-width: 32ch;
}
.footer-back-col { display: flex; flex-direction: column; align-items: flex-end; justify-content: flex-start; }
.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--dark-muted);
  padding: .55rem .8rem;
  border: 1px solid var(--dark-line);
  border-radius: var(--r-md);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.back-to-top svg { width: .9rem; height: .9rem; }
.back-to-top:hover { color: var(--dark-text); border-color: var(--gold-soft); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 1.5rem;
  font-size: .82rem;
  color: var(--dark-muted);
}
.footer-bottom-muted { color: var(--dark-muted); opacity: .7; }

/* ---------- Reveal on scroll ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .ethics-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-back-col { align-items: flex-start; }
}

@media (max-width: 900px) {
  :root { --header-h: 68px; }

  .main-nav, .visit-grfe { display: none; }
  .nav-toggle { display: flex; }

  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; min-height: 340px; max-width: 320px; margin-inline: auto; }

  .about-grid { grid-template-columns: 1fr; }
  .about-points { grid-template-columns: 1fr 1fr; }

  .journal-card { grid-template-columns: 1fr; }
  .journal-card-aside { max-width: 240px; margin-inline: auto; }

  .authors-grid { grid-template-columns: 1fr; }
  .authors-list { grid-template-columns: 1fr; }

  .split { grid-template-columns: 1fr; }
  .split-visual { order: -1; }
  .oa-visual { max-width: 260px; margin-inline: auto; }

  .discovery-grid { grid-template-columns: 1fr; }

  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  :root { --header-h: 64px; }
  .container { padding-inline: 1.1rem; }

  .hero { padding-top: 2.5rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .about-points { grid-template-columns: 1fr; }
  .card-grid-4 { grid-template-columns: 1fr; }
  .ethics-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .footer-back-col { align-items: flex-start; }

  .section { padding-block: 3rem; }
  .section-head { margin-bottom: 2rem; }

  .brand-name { font-size: .82rem; letter-spacing: .06em; }
  .brand-logo { width: 36px; height: 36px; }

  .mobile-nav { width: 100vw; }
}

@media (max-width: 380px) {
  .hero-title { font-size: 2.1rem; }
  .section-title { font-size: 1.6rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .nav-toggle, .mobile-nav, .mobile-backdrop, .hero-visual, .back-to-top { display: none !important; }
  body { background: #fff; color: #000; }
  .section-dark { background: #fff; color: #000; }
}