/* ================================================================
   Meredic — Production Stylesheet
   ================================================================ */

/* ── Reset ─────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: inherit;
  font-weight: inherit;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ── Tokens ────────────────────────────────────────────────────── */
:root {
  --cream: #EFE8D6;
  --cream-2: #E6DEC6;
  --paper: #F5EFDE;
  --ink: #1A1A1A;
  --ink-2: #2B2B2B;
  --ash: #6B665B;
  --hair: rgba(26, 26, 26, 0.12);
  --hair-2: rgba(26, 26, 26, 0.06);
  --gunmetal: #2A2A2A;
  --clay: #B58963;

  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'Manrope', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --max-w: 1320px;
  --px: 24px;
}

@media (min-width: 768px) {
  :root {
    --px: 40px;
  }
}

/* ── Base ──────────────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--ink);
  color: var(--cream);
}

/* ── Skip Link ─────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 100;
  padding: 8px 16px;
  background: var(--ink);
  color: var(--cream);
  border-radius: 0 0 8px 8px;
  font-size: 13px;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

/* ── Utilities ─────────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--px);
  padding-right: var(--px);
}

.border-hair {
  border-color: var(--hair);
}

.font-serif {
  font-family: var(--font-serif);
}

.font-mono {
  font-family: var(--font-mono);
}

/* Paper grain texture */
.paper-grain {
  background-image:
    radial-gradient(rgba(27, 27, 29, 0.025) 1px, transparent 1px),
    radial-gradient(rgba(27, 27, 29, 0.018) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1px 2px;
}

/* ── Focus ─────────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ── Eyebrow ───────────────────────────────────────────────────── */
.eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ash);
}

/* ── Typography ────────────────────────────────────────────────── */
.headline-hero {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5.5vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.012em;
  max-width: 24ch;
}

.headline-section {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.04;
  letter-spacing: -0.01em;
}

.headline-cta {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.5vw, 56px);
  line-height: 1.0;
  letter-spacing: -0.012em;
}

.text-body {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
}

.text-body-lg {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
}

@media (min-width: 768px) {
  .text-body-lg {
    font-size: 17.5px;
  }
}

.text-sm {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-2);
}

.text-xs {
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink-2);
}

.text-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ash);
}

.text-tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--clay);
}

.text-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ash);
}

.text-aside {
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 34ch;
}

.clay {
  color: var(--clay);
}

.ash {
  color: var(--ash);
}

/* ── Links ─────────────────────────────────────────────────────── */
.link-subtle {
  text-decoration: underline;
  text-underline-offset: 5px;
  text-decoration-color: var(--hair);
  transition: text-decoration-color 0.2s;
}

.link-subtle:hover {
  text-decoration-color: var(--ink);
}

.link-nav {
  font-size: 13px;
  color: var(--ink-2);
  transition: color 0.2s;
}

.link-nav:hover {
  color: var(--clay);
}

/* ── Buttons ───────────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0 20px;
  height: 40px;
  border-radius: 9999px;
  background: var(--ink);
  color: var(--cream);
  font-size: 13px;
  transition: transform 0.25s ease, background 0.25s ease;
}

.btn-primary:hover {
  background: var(--gunmetal);
}

.btn-primary--sm {
  height: 32px;
  padding: 0 14px;
  font-size: 12px;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 20px;
  height: 44px;
  border-radius: 9999px;
  background: var(--cream);
  color: var(--ink);
  font-size: 13px;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.btn-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* ── Nav ───────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  transition: background-color 0.22s, border-color 0.22s;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom-color: var(--hair);
}

.site-header.nav-open {
  background: var(--cream);
  transition: background-color 0s;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-text {
  font-family: var(--font-serif);
  font-size: 21px;
  line-height: 1;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 32px;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Mobile menu toggle */
.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  transition: background 0.2s;
}

.nav-toggle:hover {
  background: rgba(26, 26, 26, 0.06);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

/* Mobile nav overlay */
.mobile-nav {
  display: flex;
  position: fixed;
  inset: 64px 0 0 0;
  z-index: 39;
  background: var(--cream);
  padding: 32px var(--px);
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--hair);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
  transform: translateY(0);
}

.mobile-nav a {
  font-size: 20px;
  font-family: var(--font-serif);
  padding: 12px 0;
  border-bottom: 1px solid var(--hair-2);
  transition: color 0.2s;
}

.mobile-nav a:hover {
  color: var(--clay);
}

/* ── Sections ──────────────────────────────────────────────────── */
.section {
  padding-top: 64px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 768px) {
  .section {
    padding-top: 96px;
    padding-bottom: 96px;
  }
}

/* ── Hero ──────────────────────────────────────────────────────── */
.hero {
  padding-top: 48px;
  padding-bottom: 64px;
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 768px) {
  .hero {
    padding-top: 80px;
    padding-bottom: 80px;
  }
}

.hero-accent {
  color: var(--clay);
  font-family: var(--font-serif);
  font-style: italic;
}

.hero-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 768px) {
  .hero-grid {
    margin-top: 48px;
    grid-template-columns: 7fr 5fr;
    gap: 32px;
  }
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.hero-aside {
  padding-top: 0;
}

@media (min-width: 768px) {
  .hero-aside {
    padding-left: 32px;
    border-left: 1px solid var(--hair);
  }
}

/* ── Technology ────────────────────────────────────────────────── */
.tech-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 64px;
}

@media (min-width: 768px) {
  .tech-header {
    grid-template-columns: 4fr 8fr;
    margin-bottom: 96px;
  }
}

.tech-header-body {
  max-width: 58ch;
}

@media (min-width: 768px) {
  .tech-header-body {
    margin-left: auto;
    padding-top: 12px;
  }
}

.tech-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 48px 0;
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 768px) {
  .tech-item {
    grid-template-columns: 3fr 5fr 3fr;
    gap: 40px;
    padding: 64px 0;
  }
}

.tech-item-name {
  font-family: var(--font-serif);
  font-size: 32px;
  line-height: 1.0;
  margin-top: 12px;
}

@media (min-width: 768px) {
  .tech-item-name {
    font-size: 44px;
  }
}

.tech-item-sub {
  font-size: 13px;
  color: var(--ash);
  font-style: italic;
  font-family: var(--font-serif);
  margin-top: 8px;
}

.tech-item-body {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-2);
}

@media (min-width: 768px) {
  .tech-item-body {
    font-size: 16px;
  }
}

.spec-list {
  align-self: start;
}

.spec-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--hair-2);
}

.spec-key {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ash);
}

.spec-val {
  font-size: 12px;
  color: var(--ink-2);
  text-align: right;
}

/* ── Research ──────────────────────────────────────────────────── */
.research-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

@media (min-width: 768px) {
  .research-header {
    grid-template-columns: 4fr 8fr;
    margin-bottom: 64px;
  }
}

.research-header-body {
  max-width: 58ch;
}

@media (min-width: 768px) {
  .research-header-body {
    margin-left: auto;
    padding-top: 12px;
  }
}

/* Paper accordion */
.paper-item {
  border-bottom: 1px solid var(--hair);
}

.paper-summary {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: baseline;
  padding: 28px 0;
  cursor: pointer;
  transition: background-color 0.2s;
  list-style: none;
}

.paper-summary::-webkit-details-marker {
  display: none;
}

.paper-summary:hover {
  background: rgba(245, 239, 222, 0.6);
}

@media (min-width: 768px) {
  .paper-summary {
    grid-template-columns: 80px 1fr 3fr 40px;
    padding: 32px 0;
  }
}

.paper-id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ash);
}

.paper-title {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.15;
  letter-spacing: -0.005em;
}

@media (min-width: 768px) {
  .paper-title {
    font-size: 22px;
  }
}

.paper-authors {
  display: none;
  font-size: 12px;
  color: var(--ash);
  font-style: italic;
  font-family: var(--font-serif);
}

@media (min-width: 768px) {
  .paper-authors {
    display: block;
  }
}

.paper-chev {
  display: none;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 9999px;
  border: 1px solid var(--hair);
  font-size: 14px;
  line-height: 1;
  transition: transform 0.3s ease;
  flex-shrink: 0;
  justify-self: end;
}

@media (min-width: 768px) {
  .paper-chev {
    display: flex;
  }
}

details[open] .paper-chev {
  transform: rotate(45deg);
}

.paper-detail {
  padding-bottom: 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .paper-detail {
    grid-template-columns: 80px 7fr 4fr;
    gap: 16px;
  }
}

.paper-abstract {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 68ch;
}

.paper-links {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  font-size: 12px;
}

.paper-date {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ash);
}

.paper-authors-mobile {
  display: block;
  margin-top: 8px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12px;
  color: var(--ink-2);
  text-transform: none;
  letter-spacing: normal;
}

@media (min-width: 768px) {
  .paper-authors-mobile {
    display: none;
  }
}

.papers-all {
  padding-top: 32px;
  font-size: 12px;
}

/* ── Deployments ───────────────────────────────────────────────── */
.deploy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 768px) {
  .deploy-grid {
    grid-template-columns: 4fr 7fr;
    gap: 64px;
  }
}

.deploy-intro p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
  margin-top: 24px;
  max-width: 40ch;
}

.deploy-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 768px) {
  .deploy-row {
    padding: 28px 0;
  }
}

.deploy-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ash);
}

.deploy-name {
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1;
}

@media (min-width: 768px) {
  .deploy-name {
    font-size: 26px;
  }
}

.deploy-status {
  font-size: 12px;
  color: var(--ash);
  font-style: italic;
  font-family: var(--font-serif);
  text-align: right;
}

/* ── CTA ───────────────────────────────────────────────────────── */
.cta-section {
  background: var(--ink);
  color: var(--cream);
  padding-top: 96px;
  padding-bottom: 96px;
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 768px) {
  .cta-section {
    padding-top: 128px;
    padding-bottom: 128px;
  }
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 768px) {
  .cta-grid {
    grid-template-columns: 8fr 4fr;
    align-items: end;
  }
}

.cta-label {
  font-size: 12px;
  opacity: 0.6;
}

.cta-headline {
  margin-top: 16px;
}

.cta-body {
  font-size: 14px;
  line-height: 1.7;
  opacity: 0.7;
  max-width: 40ch;
}

.cta-body .btn-cta {
  margin-top: 24px;
}

/* ── Footer ────────────────────────────────────────────────────── */
.site-footer {
  padding-top: 80px;
  padding-bottom: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 64px;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 5fr 2fr 2fr 2fr;
  }
}

.footer-brand {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .footer-brand {
    grid-column: 1;
  }
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.footer-brand-logo span {
  font-family: var(--font-serif);
  font-size: 30px;
  line-height: 1;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 40ch;
}

.footer-col-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ash);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  font-size: 13px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--clay);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--hair);
  font-size: 11px;
  color: var(--ash);
}

.footer-bottom-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-bottom-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-bottom a {
  transition: color 0.2s;
}

.footer-bottom a:hover {
  color: var(--ink);
}

/* ── Scroll Reveal ─────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* ── Reduced Motion ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}