/* ============================================
   Brava — Research / Benchmarks
   Shared styles for /research/* pages.
   ============================================ */

:root {
  --color-base: #0D0D0F;
  --color-surface: #1A1A1E;
  --color-surface-2: #24242A;
  --color-warm-white: #F5F0E8;
  --color-volt: #C8FF00;
  --color-cyan: #00E5FF;
  --color-mid-gray: #8A8A90;
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body: 'Barlow', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-warm-white);
  background: var(--color-base);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--color-volt); text-decoration: none; }
a:hover { color: var(--color-warm-white); }
em { font-style: italic; }

/* ===== Top Nav (shared with landing pages) ===== */
/* Spacing + max-width tokens needed by the nav (mirrored from landing/tokens.css) */
:root {
  --space-xs: 0.25rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --max-width: 1080px;
  --color-volt-hover: #d4ff33;
  --drawer-animation-duration: 300ms;
  --hamburger-animation-duration: 200ms;
}
@media (min-width: 768px) {
  :root {
    --space-lg: 2rem;
  }
}

.topnav {
  position: fixed;
  top: var(--space-sm);
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 2 * var(--space-sm));
  max-width: var(--max-width);
  z-index: 100;
  background-color: rgba(13, 13, 15, 0.55);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgba(245, 240, 232, 0.1);
  border-radius: 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(245, 240, 232, 0.06);
  transition: border-bottom-color var(--drawer-animation-duration) ease;
}

/* When drawer is open, topnav dissolves into the scrim. */
.nav-drawer--open .topnav {
  background-color: transparent;
  border-color: transparent;
  box-shadow: none;
}

body.nav-drawer--open {
  overflow: hidden;
}

.topnav__inner {
  padding: 0.85rem 0.85rem 0.85rem var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topnav__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-style: italic;
  font-size: 1.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-warm-white);
}

.topnav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.topnav__link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-mid-gray);
  padding: 0.55rem 0;
  transition: color 0.2s ease;
}

.topnav__link:hover { color: var(--color-warm-white); }
.topnav__link--active { color: var(--color-warm-white); }

.topnav__cta {
  display: inline-block;
  color: var(--color-base) !important;
  background-color: var(--color-volt);
  padding: 0.4rem 1.1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: background-color 0.2s ease, transform 0.15s ease;
}
.topnav__cta:hover { background-color: var(--color-volt-hover); transform: translateY(-1px); }
.topnav__cta:active { transform: translateY(0); }

/* --- Mobile Navigation (Dropdown from Header) --- */
.nav-drawer { display: none; }

@media (max-width: 767px) {
  .js-nav-enhanced .nav-drawer { display: block; }
  .js-nav-enhanced .topnav__links { display: none; }
}

.nav-drawer__scrim {
  position: fixed;
  top: 0; left: 0; right: 0;
  width: 100%; height: 100vh;
  background-color: rgba(13, 13, 15, 0.92);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 90;
  transition: opacity var(--drawer-animation-duration) ease-out, visibility var(--drawer-animation-duration);
}

.nav-drawer__panel {
  position: fixed;
  top: calc(var(--space-sm) + 3.1rem - 1px);
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  width: calc(100% - 2 * var(--space-sm));
  max-width: var(--max-width);
  background-color: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  opacity: 0;
  transition: transform var(--drawer-animation-duration) ease-out, opacity var(--drawer-animation-duration) ease-out;
  z-index: 160;
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
  pointer-events: none;
}

.nav-drawer--open .nav-drawer__scrim {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.nav-drawer--open .nav-drawer__panel {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.nav-drawer__toggle {
  display: none;
  width: 48px; height: 48px;
  padding: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: 170;
}
@media (max-width: 767px) {
  .js-nav-enhanced .nav-drawer__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

.hamburger-icon { width: 24px; height: 24px; position: relative; }
.hamburger-icon__line {
  display: block;
  position: absolute;
  width: 24px; height: 2px;
  background-color: var(--color-warm-white);
  transition: transform var(--hamburger-animation-duration) ease, opacity var(--hamburger-animation-duration) ease;
}
.hamburger-icon__line:nth-child(1) { top: 4px; }
.hamburger-icon__line:nth-child(2) { top: 11px; }
.hamburger-icon__line:nth-child(3) { bottom: 4px; }
.nav-drawer--open .hamburger-icon__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-drawer--open .hamburger-icon__line:nth-child(2) { opacity: 0; }
.nav-drawer--open .hamburger-icon__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-drawer__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.nav-drawer__link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-mid-gray);
  padding: 0.75rem var(--space-sm);
  min-height: 44px;
  display: flex;
  align-items: center;
  transition: color 0.2s ease, background-color 0.2s ease;
  border-radius: 4px;
}
.nav-drawer__link:hover {
  color: var(--color-warm-white);
  background-color: rgba(245, 240, 232, 0.05);
}
.nav-drawer__link.is-active { color: var(--color-volt); }

.nav-drawer__cta {
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid rgba(245, 240, 232, 0.1);
  display: block;
}

/* Drawer CTA gets the prominent primary-button treatment, not the
   compact topnav-CTA padding used in the desktop header. Stretches
   full-width so the tap target spans the menu. */
.nav-drawer__cta .topnav__cta {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-size: 1.15rem;
  min-height: 44px;
}

/* Drawer CTA gets the prominent primary-button treatment, not the
   compact topnav-CTA padding used in the desktop header. */
.nav-drawer__cta .topnav__cta {
  padding: 0.9rem 2.25rem;
  font-size: 1.1rem;
}

@media (prefers-reduced-motion: reduce) {
  .nav-drawer__panel,
  .nav-drawer__scrim,
  .hamburger-icon__line {
    transition: none;
  }
}

.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;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  max-width: 1080px;
  margin: 0 auto;
  padding: 5rem 1.5rem 0;
  font-size: 0.85rem;
  color: var(--color-mid-gray);
  letter-spacing: 0.02em;
}
.breadcrumb a { color: var(--color-mid-gray); }
.breadcrumb a:hover { color: var(--color-volt); }

/* ===== Hero ===== */
.hero {
  padding: 2.5rem 1.5rem 1.5rem;
  max-width: 1080px;
  margin: 0 auto;
}
.hero__eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.85rem;
  color: var(--color-volt);
  margin-bottom: 0.75rem;
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 1;
  font-size: clamp(2.25rem, 6vw, 4rem);
  margin-bottom: 1rem;
}
.hero__sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--color-warm-white);
  max-width: 740px;
  line-height: 1.55;
  opacity: 0.85;
}

/* ===== Position / Topic Nav ===== */
.chip-nav {
  max-width: 1080px;
  margin: 1rem auto 0;
  padding: 0 1.5rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.chip {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-surface-2);
  color: var(--color-mid-gray);
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  white-space: nowrap;
}
.chip:hover { color: var(--color-warm-white); border-color: var(--color-mid-gray); }
.chip--active {
  background: var(--color-volt);
  color: var(--color-base);
  border-color: var(--color-volt);
}
.chip--active:hover { color: var(--color-base); border-color: var(--color-volt); }

/* ===== Methodology / Callout ===== */
.callout {
  max-width: 1080px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: var(--color-surface);
  border-left: 3px solid var(--color-volt);
}
.callout--cyan { border-left-color: var(--color-cyan); }
.callout--gray { border-left-color: var(--color-mid-gray); }
.callout__label {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--color-volt);
  margin-bottom: 0.5rem;
}
.callout--cyan .callout__label { color: var(--color-cyan); }
.callout--gray .callout__label { color: var(--color-mid-gray); }
.callout__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.callout__body {
  font-size: 0.95rem;
  line-height: 1.6;
  opacity: 0.9;
}
.callout__body p + p { margin-top: 0.75rem; }
.callout__formula {
  display: inline-block;
  font-family: 'SF Mono', Monaco, monospace;
  background: var(--color-base);
  padding: 0.25rem 0.5rem;
  margin: 0 0.25rem 0.25rem 0;
  font-size: 0.85rem;
  color: var(--color-cyan);
  border-radius: 2px;
}

/* ===== Section block ===== */
section.block {
  max-width: 1080px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--color-surface);
}
.block__heading {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: 0.5rem;
  line-height: 1.05;
}
.block__intro {
  color: var(--color-warm-white);
  opacity: 0.75;
  max-width: 740px;
  margin-bottom: 1.75rem;
  font-size: 1rem;
}
.block__intro p + p { margin-top: 0.75rem; }
.block__body {
  max-width: 740px;
  font-size: 1rem;
  line-height: 1.7;
  opacity: 0.92;
}
.block__body p + p { margin-top: 1rem; }
.block__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 1.2rem;
  margin: 1.5rem 0 0.5rem;
}
.block__body ul {
  margin: 0.5rem 0 1rem 1.25rem;
  padding: 0;
}
.block__body li { margin-bottom: 0.5rem; }

/* ===== Stats Table ===== */
.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  margin-bottom: 1.5rem;
}
.stats-table caption {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  text-align: left;
  color: var(--color-mid-gray);
  padding-bottom: 0.75rem;
}
.stats-table th, .stats-table td {
  padding: 0.85rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-surface);
  font-size: 0.95rem;
}
.stats-table thead th {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--color-mid-gray);
  border-bottom: 2px solid var(--color-surface-2);
}
.stats-table .num { text-align: right; font-weight: 600; }
.stats-table .num--d1 { color: var(--color-volt); }
.stats-table .metric-label { font-weight: 600; }
.stats-table .metric-note {
  display: block;
  font-size: 0.75rem;
  color: var(--color-mid-gray);
  font-weight: 400;
  margin-top: 0.15rem;
}

/* ===== Tier / Card Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.card {
  padding: 1.5rem;
  background: var(--color-surface);
  border-top: 3px solid var(--color-volt);
}
.card--cyan { border-top-color: var(--color-cyan); }
.card--gray { border-top-color: var(--color-mid-gray); }
.card__rank {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-volt);
  margin-bottom: 0.5rem;
}
.card--cyan .card__rank { color: var(--color-cyan); }
.card--gray .card__rank { color: var(--color-mid-gray); }
.card__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.card__meta {
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.85rem;
  color: var(--color-cyan);
  margin-bottom: 0.75rem;
}
.card__desc {
  font-size: 0.9rem;
  line-height: 1.5;
  opacity: 0.85;
}
.card__desc p + p { margin-top: 0.5rem; }

/* ===== Hub Index Tiles ===== */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.tile {
  display: block;
  padding: 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-surface-2);
  transition: border-color 0.15s ease;
  color: var(--color-warm-white);
}
.tile:hover {
  border-color: var(--color-volt);
  color: var(--color-warm-white);
}
.tile__kicker {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--color-volt);
  margin-bottom: 0.5rem;
}
.tile__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  line-height: 1.1;
}
.tile__desc {
  font-size: 0.95rem;
  line-height: 1.55;
  opacity: 0.85;
}
.tile__arrow {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.85rem;
  color: var(--color-volt);
}

/* ===== Two Column ===== */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .two-col { grid-template-columns: 1fr 1fr; }
}

/* ===== CTA section ===== */
.cta-section {
  padding: 4rem 1.5rem;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.cta-section__heading {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  line-height: 1.05;
  margin-bottom: 1rem;
}
.cta-section__body {
  font-size: 1.05rem;
  color: var(--color-warm-white);
  opacity: 0.85;
  margin-bottom: 2rem;
}
.cta-btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--color-volt);
  color: var(--color-base);
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 1.1rem;
}

/* ===== Footer ===== */
.footer {
  padding: 3rem 1.5rem 2rem;
  border-top: 1px solid var(--color-surface);
  text-align: center;
}
.footer__source {
  font-size: 0.8rem;
  color: var(--color-mid-gray);
  max-width: 740px;
  margin: 0 auto 1rem;
  line-height: 1.55;
}
.footer__source p + p { margin-top: 0.5rem; }
.footer__tagline {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  color: var(--color-mid-gray);
  opacity: 0.6;
}

/* ===== Definition list (timeline, scholarship rows) ===== */
.dl {
  margin: 1.5rem 0;
  border-top: 1px solid var(--color-surface);
}
.dl__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.25rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-surface);
}
@media (min-width: 720px) {
  .dl__row { grid-template-columns: 220px 1fr; gap: 1.5rem; }
}
.dl__term {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.9rem;
  color: var(--color-volt);
}
.dl__desc {
  font-size: 1rem;
  line-height: 1.6;
  opacity: 0.92;
}
.dl__desc p + p { margin-top: 0.5rem; }
.dl__desc strong { color: var(--color-warm-white); font-weight: 600; }