/* =========================================================
   overview.css — Research Overview only.
   Scoped under .overview so no other page is affected.
   Monochrome: black, white, grey. Type families come from
   base.css; colours from theme.css. Nothing is redefined here.
   ========================================================= */

.overview {
  position: relative;
  overflow-x: clip;
}

/* Shared inner rail — matches header/footer at 1040px */
.ov-wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 25px;
}

.ov-wrap--narrow {
  max-width: 720px;
}

.overview section {
  padding: clamp(4.5rem, 10vw, 7.5rem) 0;
}

.overview .ov-hero {
  padding-top: clamp(3rem, 7vw, 5rem);
}

/* ---------------------------------------------------------
   Type — sizes tuned for whitespace, families untouched
   --------------------------------------------------------- */

.ov-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-align: center;
  margin: 0 0 1.75rem;
}

.ov-title {
  font-family: var(--font-sans);
  font-size: clamp(2.1rem, 5.6vw, 3.4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.022em;
  color: var(--text-strong);
  text-align: center;
  margin: 0 auto;
  max-width: 17ch;
  text-wrap: balance;
}

.ov-lede {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--text-muted);
  text-align: center;
  margin: 1.75rem auto 0;
  max-width: 56ch;
  text-wrap: pretty;
}

.ov-section-title {
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text-strong);
  text-align: center;
  margin: 0 auto;
  max-width: 24ch;
  text-wrap: balance;
}

.ov-section-lede {
  font-family: var(--font-mono);
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--text-muted);
  text-align: center;
  margin: 1.25rem auto 0;
  max-width: 60ch;
}

/* Focus-areas statement — the one large claim on the page */
.ov-statement {
  font-family: var(--font-sans);
  font-size: clamp(1.35rem, 3.1vw, 2rem);
  font-weight: 600;
  line-height: 1.34;
  letter-spacing: -0.015em;
  color: var(--text-strong);
  text-align: center;
  margin: 0 auto;
  max-width: 34ch;
  text-wrap: balance;
}

/* The three descriptive paragraphs */
.ov-prose {
  max-width: 66ch;
  margin: clamp(2.5rem, 6vw, 3.5rem) auto 0;
}

.ov-prose p {
  font-family: var(--font-mono);
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--text);
  margin: 0 0 1.75rem;
}

.ov-prose p:last-child { margin-bottom: 0; }

.ov-rule-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--text-faint);
}

/* ---------------------------------------------------------
   Buttons — white, black, grey only
   --------------------------------------------------------- */

.ov-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  margin-top: 2.5rem;
}

.ov-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.35rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-strong);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.ov-btn:hover {
  border-color: var(--border-strong);
  background: var(--surface);
}

/* Solid: black on white, white on black — flips with the theme */
.ov-btn--solid {
  background: var(--text-strong);
  border-color: var(--text-strong);
  color: var(--bg);
}

.ov-btn--solid:hover {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

.ov-btn--ghost {
  background: none;
  border-color: transparent;
  padding-inline: 0.25rem;
  color: var(--text-muted);
}

.ov-btn--ghost:hover {
  background: none;
  border-color: transparent;
  color: var(--text-strong);
}

/* ---------------------------------------------------------
   Figures — the paintings. Frames crop via object-fit.
   A missing file leaves a quiet grey block, not a broken icon.
   --------------------------------------------------------- */

.ov-figure {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
}

.ov-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;        /* frame crop */
  object-position: center;
}

.ov-figure--hero {
  aspect-ratio: 16 / 7;
  margin-top: clamp(3rem, 7vw, 4.5rem);
  border-radius: 12px;
}

/* The hero painting is portrait, so a 16:7 band shows only a third of it.
   Bias the crop upward to keep the white-to-red transition rather than
   landing on the solid red field below it. */
.ov-figure--hero img { object-position: center 15%; }

.ov-figure--wide   { aspect-ratio: 16 / 9; }
/* Portrait: the paintings are ~2:3, so a landscape card frame would crop
   away most of the composition and leave an empty white band. */
.ov-figure--card   { aspect-ratio: 4 / 5; }
.ov-figure--square { aspect-ratio: 1 / 1; }

/* ---------------------------------------------------------
   Policy, ethics & legal frameworks
   --------------------------------------------------------- */

.ov-frameworks {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.75rem;
  margin-top: clamp(2.75rem, 6vw, 4rem);
}

.ov-framework {
  padding: 1.6rem 0 0;
  border-top: 1px solid var(--border);
}

.ov-framework__scope {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 0.6rem;
}

.ov-framework__name {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text-strong);
  margin: 0 0 0.6rem;
}

.ov-framework__body {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0;
}

/* ---------------------------------------------------------
   Publications — filters + horizontal rails
   --------------------------------------------------------- */

/* `hidden` has to outrank the display values set below. */
.overview [hidden],
.ov-rail-group[hidden] {
  display: none !important;
}

.ov-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
}

.ov-filters button {
  appearance: none;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.ov-filters button:hover {
  color: var(--text-strong);
  border-color: var(--border);
}

.ov-filters button[aria-pressed="true"] {
  background: var(--text-strong);
  color: var(--bg);
  border-color: var(--text-strong);
}

.ov-rail-group { margin-top: clamp(3rem, 6vw, 4.5rem); }

.ov-rail-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.ov-rail-title {
  font-family: var(--font-sans);
  font-size: 1.3rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text-strong);
  margin: 0;
}

/* Newest first, scrolls horizontally, bleeds to the viewport edge */
.ov-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(266px, 320px);
  gap: 1.25rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  padding: 0.25rem 25px 1.5rem;
  margin-inline: calc(50% - 50vw);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* Keep the first card aligned to the 1040px rail on wide screens */
@media (min-width: 1090px) {
  .ov-rail { padding-inline: max(25px, calc(50vw - 520px)); }
}

.ov-rail::-webkit-scrollbar { height: 6px; }
.ov-rail::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 999px;
}

.ov-rail > [role="listitem"] { display: flex; }

.ov-card {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  width: 100%;
  gap: 0.9rem;
  padding: 0;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.ov-card .ov-figure {
  flex: none;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.ov-card:hover .ov-figure {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.ov-card__title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--text-strong);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ov-card__meta {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
}

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

.ov-rail-empty {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-faint);
  text-align: center;
  margin: 2rem 0 0;
}

/* ---------------------------------------------------------
   Modal
   --------------------------------------------------------- */

.ov-modal {
  width: min(680px, calc(100vw - 2.5rem));
  max-height: min(84vh, 900px);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  overflow: hidden;
}

.ov-modal::backdrop {
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.ov-modal__scroll {
  max-height: min(84vh, 900px);
  overflow-y: auto;
  padding: 2rem clamp(1.4rem, 4vw, 2.5rem) 2.5rem;
}

.ov-modal__close {
  position: sticky;
  top: 0;
  float: right;
  appearance: none;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
}

.ov-modal__close:hover {
  border-color: var(--border-strong);
  color: var(--text-strong);
}

.ov-modal__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  margin: 0 0 0.9rem;
}

.ov-modal__title {
  font-family: var(--font-sans);
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  font-weight: 650;
  line-height: 1.28;
  letter-spacing: -0.012em;
  color: var(--text-strong);
  margin: 0 0 1.5rem;
  max-width: 34ch;
}

.ov-modal__label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 0.7rem;
}

.ov-modal__abstract {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text);
  margin: 0 0 2rem;
}

.ov-modal__findings {
  margin: 0 0 2rem;
  padding: 0;
  list-style: none;
}

.ov-modal__findings li {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-muted);
  padding-left: 1.4rem;
  margin-bottom: 0.9rem;
}

.ov-modal__findings li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--text-faint);
}

/* ---------------------------------------------------------
   Closing
   --------------------------------------------------------- */

.ov-closing {
  border-radius: 16px;
  background: var(--surface-grey);
  padding: clamp(3.5rem, 9vw, 5.5rem) 1.5rem;
  text-align: center;
}

/* ---------------------------------------------------------
   Responsive
   --------------------------------------------------------- */

@media (max-width: 900px) {
  .ov-frameworks { grid-template-columns: 1fr; gap: 0; }
  .ov-framework { margin-top: 1.75rem; }
}

@media (max-width: 620px) {
  .ov-figure--hero { aspect-ratio: 4 / 3; }
  .ov-rail { grid-auto-columns: minmax(240px, 78vw); }
  .ov-rail-head { flex-direction: column; align-items: flex-start; gap: 0.35rem; }
  .ov-prose p { font-size: 0.94rem; line-height: 1.8; }
}

@media (prefers-reduced-motion: reduce) {
  .ov-btn,
  .ov-card .ov-figure { transition: none; }
  .ov-card:hover .ov-figure { transform: none; }
}