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

:root {
  --ink: #0e0e0e;
  --paper: #f5f2eb;
  --accent: #1a3a5c;
  --accent2: #c8472b;
  --mid: #6b6457;
  --rule: #d4cfc5;
  --mono: 'DM Mono', monospace;
  --serif: 'DM Serif Display', serif;
  --sans: 'DM Sans', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 3rem;
  background: rgba(245, 242, 235, 0.93);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.70rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--mid);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.nav-active {
  color: var(--accent2);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
  transform-origin: center;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── PAGE WRAPPER ── */
.page-wrap {
  padding-top: 72px;
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding-top: 72px;
}

.hero-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 4rem 6rem 6rem;
}

.hero-kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 1.5rem;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(2.8rem, 5vw, 4.2rem);
  line-height: 1.08;
  color: var(--ink);
  margin-bottom: 2rem;
}

h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--mid);
  max-width: 48ch;
  margin-bottom: 3rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  background: var(--accent);
}

.axis-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-caption {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  right: 2rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: rgba(245, 242, 235, 0.4);
  letter-spacing: 0.08em;
  line-height: 1.6;
}

/* ── BUTTONS ── */
.btn {
  font-family: var(--mono);
  font-size: 0.73rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.8rem 1.6rem;
  border-radius: 2px;
  text-decoration: none;
  transition: all 0.2s;
  display: inline-block;
}

.btn-primary {
  background: var(--accent);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--accent2);
}

.btn-secondary {
  border: 1.5px solid var(--accent);
  color: var(--accent);
}

.btn-secondary:hover {
  background: var(--accent);
  color: var(--paper);
}

/* ── SECTION BASE ── */
section {
  padding: 7rem 6rem;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 0.85rem;
}

h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--ink);
}

h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
  margin-bottom: 0.85rem;
  color: var(--ink);
}

p {
  max-width: 68ch;
}

p+p {
  margin-top: 1rem;
}

/* ── PAGE HEADER (inner pages) ── */
.page-header {
  background: var(--ink);
  padding: 5rem 6rem 4rem;
}

.page-header .section-label {
  color: var(--accent2);
}

.page-header h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  color: var(--paper);
  margin-bottom: 1rem;
}

.page-header .page-sub {
  font-size: 1.05rem;
  color: rgba(245, 242, 235, 0.6);
  max-width: 58ch;
  line-height: 1.75;
}

/* ── STAT STRIP ── */
.stats {
  background: var(--accent);
  padding: 3.5rem 6rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat-item {
  border-left: 2px solid rgba(245, 242, 235, 0.2);
  padding-left: 1.5rem;
}

.stat-num {
  font-family: var(--serif);
  font-size: 2.6rem;
  color: var(--paper);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: rgba(245, 242, 235, 0.55);
  text-transform: uppercase;
  line-height: 1.5;
}

/* ── PARADIGM GRID ── */
.paradigms {
  background: var(--ink);
  color: var(--paper);
}

.paradigms h2 {
  color: var(--paper);
}

.paradigms .section-label {
  color: var(--accent2);
}

.paradigm-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 3.5rem;
  border: 1px solid rgba(245, 242, 235, 0.12);
}

.paradigm-cell {
  padding: 2.5rem 2rem;
  border-right: 1px solid rgba(245, 242, 235, 0.12);
}

.paradigm-cell:last-child {
  border-right: none;
}

.paradigm-cell.highlight {
  background: rgba(200, 71, 43, 0.12);
}

.paradigm-num {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.15em;
  color: rgba(245, 242, 235, 0.3);
  margin-bottom: 1.25rem;
}

.paradigm-cell h3 {
  font-size: 1.3rem;
  margin-bottom: 0.85rem;
  color: var(--paper);
}

.paradigm-cell.highlight h3 {
  color: #e8a090;
}

.paradigm-cell p {
  font-size: 0.90rem;
  color: rgba(245, 242, 235, 0.62);
  line-height: 1.75;
  max-width: none;
}

.paradigm-tag {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.10em;
  color: rgba(245, 242, 235, 0.28);
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(245, 242, 235, 0.1);
}

.paradigm-cell.highlight .paradigm-tag {
  color: var(--accent2);
}

/* ── CARD GRID ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  border: 1px solid var(--rule);
  padding: 2.5rem;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: var(--accent);
}

.card-label {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.15em;
  color: var(--accent2);
  display: block;
  margin-bottom: 0.85rem;
}

.card h3 {
  margin-bottom: 0.6rem;
}

.card p {
  font-size: 0.91rem;
  color: var(--mid);
  line-height: 1.72;
  max-width: none;
}

/* ── TRACK GRID ── */
.track-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.track-card {
  padding: 1.75rem;
  border: 1px solid var(--rule);
  transition: transform 0.2s;
}

.track-card:hover {
  transform: translateY(-2px);
}

.track-active {
  border-top: 3px solid var(--accent);
}

.track-planned {
  border-top: 3px solid var(--mid);
}

.track-concept {
  border-top: 3px solid var(--rule);
}

.track-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.track-badge {
  font-family: var(--mono);
  font-size: 0.60rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
}

.track-badge.active-badge {
  background: rgba(26, 58, 92, 0.10);
  color: var(--accent);
}

.track-badge.planned-badge {
  background: rgba(107, 100, 87, 0.10);
  color: var(--mid);
}

.track-badge.concept-badge {
  background: rgba(212, 207, 197, 0.4);
  color: var(--mid);
}

.track-num {
  font-family: var(--mono);
  font-size: 0.63rem;
  color: var(--mid);
}

.track-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.55rem;
}

.track-card p {
  font-size: 0.86rem;
  color: var(--mid);
  line-height: 1.7;
  max-width: none;
}

.track-output {
  font-family: var(--mono);
  font-size: 0.63rem;
  color: var(--accent2);
  letter-spacing: 0.06em;
  margin-top: 1rem !important;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  line-height: 1.5;
}

/* ── ROADMAP LIST ── */
.roadmap-list {
  border-top: 1px solid var(--rule);
  margin-top: 1rem;
}

.roadmap-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 3rem;
  padding: 2.25rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}

.roadmap-left {
  padding-top: 0.2rem;
}

.roadmap-status {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.28rem 0.65rem;
  display: inline-block;
  margin-bottom: 0.5rem;
  border-radius: 2px;
}

.roadmap-status.active {
  background: rgba(26, 58, 92, 0.1);
  color: var(--accent);
}

.roadmap-status.planned {
  background: rgba(107, 100, 87, 0.1);
  color: var(--mid);
}

.roadmap-track {
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--mid);
  letter-spacing: 0.08em;
}

.roadmap-right h3 {
  margin-bottom: 0.6rem;
}

.roadmap-right p {
  font-size: 0.91rem;
  color: var(--mid);
  line-height: 1.75;
  max-width: none;
}

/* ── PAPER LIST ── */
.paper-list {
  margin-top: 2.5rem;
  border-top: 1px solid var(--rule);
}

.paper-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 2rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  transition: color 0.2s;
}

.paper-item:hover {
  color: var(--accent2);
}

.paper-num {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--mid);
  letter-spacing: 0.10em;
  white-space: nowrap;
}

.paper-title {
  font-family: var(--serif);
  font-size: 1.02rem;
}

.paper-arrow {
  font-size: 0.9rem;
  color: var(--mid);
  transition: transform 0.2s, color 0.2s;
}

.paper-item:hover .paper-arrow {
  transform: translateX(4px);
  color: var(--accent2);
}

.paper-item-disabled {
  color: var(--mid);
  cursor: not-allowed;
}

.paper-item-disabled:hover {
  color: var(--mid);
}

.paper-item-disabled .paper-arrow {
  transform: none;
  color: rgba(107, 100, 87, 0.65);
}

.paper-dev-badge {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  background: rgba(107, 100, 87, 0.12);
  color: var(--mid);
  padding: 0.12rem 0.45rem;
  border-radius: 2px;
  margin-left: 0.5rem;
  vertical-align: middle;
}


/* ── PAPER DIAGRAM ── */
.paper-diagram {
  margin: 2rem 0;
  border: 1px solid var(--rule);
  padding: 1.5rem;
  background: var(--paper);
}

.paper-diagram img {
  display: block;
  width: 100%;
  height: auto;
}

/* ── PAPER PAGE ── */
.paper-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
  margin: 2.5rem 0;
}

.paper-meta-item {
  padding: 1.5rem 1.75rem;
  border-right: 1px solid var(--rule);
}

.paper-meta-item:last-child {
  border-right: none;
}

.paper-meta-label {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 0.4rem;
}

.paper-meta-value {
  font-size: 0.90rem;
  color: var(--ink);
  line-height: 1.5;
  max-width: none;
}

.paper-abstract {
  background: #eeeae0;
  padding: 2rem 2.5rem;
  margin: 2rem 0;
  border-left: 3px solid var(--accent);
}

.paper-abstract-label {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.paper-abstract p {
  font-size: 0.93rem;
  color: var(--mid);
  line-height: 1.78;
  max-width: none;
}

.paper-toc {
  margin: 2rem 0;
}

.paper-toc-label {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 1rem;
}

.paper-toc ol {
  padding-left: 1.25rem;
}

.paper-toc li {
  font-size: 0.91rem;
  color: var(--mid);
  padding: 0.25rem 0;
  line-height: 1.5;
}

.paper-cite {
  margin-top: 3rem;
  padding: 2rem 2.5rem;
  border: 1px solid var(--rule);
  background: var(--paper);
}

.paper-cite-label {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 0.85rem;
}

.paper-cite pre {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink);
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
  background: none;
  border: none;
  padding: 0;
  max-width: none;
}

.paper-zenodo {
  margin: 2rem 0;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.paper-zenodo .btn {
  white-space: nowrap;
}

.paper-zenodo-doi {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--mid);
  letter-spacing: 0.06em;
}

.paper-zenodo-pending {
  padding: 1.25rem 1.75rem;
  border: 1px solid var(--rule);
  background: rgba(107, 100, 87, 0.05);
}

.paper-zenodo-pending p {
  font-size: 0.91rem;
  color: var(--mid);
  margin: 0;
  max-width: none;
}

.paper-nav {
  display: flex;
  justify-content: space-between;
  padding: 2rem 0;
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.paper-nav a {
  font-family: var(--mono);
  font-size: 0.70rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--mid);
  text-decoration: none;
  transition: color 0.2s;
}

.paper-nav a:hover {
  color: var(--accent2);
}

/* ── ENV SECTION ── */
.env-section {
  background: var(--ink);
  color: var(--paper);
}

.env-section h2 {
  color: var(--paper);
}

.env-section .section-label {
  color: var(--accent2);
}

.env-numbers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid rgba(245, 242, 235, 0.1);
  margin: 3rem 0;
}

.env-stat {
  padding: 2.25rem 1.75rem;
  border-right: 1px solid rgba(245, 242, 235, 0.1);
}

.env-stat:last-child {
  border-right: none;
}

.env-big {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  color: #e8a090;
  line-height: 1.1;
  margin-bottom: 0.85rem;
  max-width: none;
}

.env-desc {
  font-size: 0.87rem;
  color: rgba(245, 242, 235, 0.52);
  line-height: 1.7;
  max-width: none;
}

.env-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.env-col h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--paper);
  margin-bottom: 1rem;
}

.env-col p {
  font-size: 0.91rem;
  color: rgba(245, 242, 235, 0.60);
  line-height: 1.78;
  margin-bottom: 1.1rem;
  max-width: none;
}

.env-quote {
  margin-top: 1.75rem;
  padding: 1.5rem 2rem;
  border-left: 3px solid var(--accent2);
  background: rgba(200, 71, 43, 0.08);
}

.env-quote p {
  font-family: var(--serif);
  font-size: 0.98rem;
  font-style: italic;
  color: rgba(245, 242, 235, 0.78);
  margin-bottom: 0.6rem;
  line-height: 1.65;
}

.env-quote cite {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.10em;
  color: rgba(245, 242, 235, 0.32);
  font-style: normal;
  text-transform: uppercase;
}

/* ── ABOUT ── */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 5rem;
}

.about-grid p {
  color: var(--mid);
  margin-bottom: 1.1rem;
}

.about-aside {
  border-left: 2px solid var(--rule);
  padding-left: 2rem;
}

.aside-block {
  margin-bottom: 2.25rem;
}

.about-portrait-block {
  margin-bottom: 2rem;
}

.about-portrait {
  width: 100%;
  max-width: 180px;
  height: auto;
  display: block;
  border: 1px solid var(--rule);
}

.aside-label {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 0.4rem;
}

.aside-block p {
  font-size: 0.87rem;
  color: var(--mid);
  margin: 0;
  max-width: none;
}

/* ── FOOTER ── */
footer {
  padding: 3rem 6rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

footer p {
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--mid);
  letter-spacing: 0.08em;
}

footer a {
  color: var(--mid);
  text-decoration: none;
}

footer a:hover {
  color: var(--accent2);
}

/* ── ANIMATIONS ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── UTILITIES ── */
.dark-section {
  background: var(--ink);
  color: var(--paper);
}

.dark-section h2 {
  color: var(--paper);
}

.dark-section .section-label {
  color: var(--accent2);
}

.tinted-section {
  background: #eeeae0;
}

.complete-loop-section,
.environment-numbers-section {
  padding-left: 6rem;
  padding-right: 6rem;
}

.rule-line {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 3rem 0;
}

.mono-tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.10em;
  color: var(--accent2);
}

.callout {
  padding: 1.75rem 2rem;
  border-left: 3px solid var(--accent);
  background: rgba(26, 58, 92, 0.05);
  margin: 2rem 0;
}

.callout p {
  font-size: 0.91rem;
  color: var(--mid);
  line-height: 1.75;
  max-width: none;
}

@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.9rem;
    padding: 1.5rem 0 1.25rem;
  }

  .axis-canvas {
    position: relative;
    inset: auto;
    width: min(92vw, 560px);
    height: auto;
    aspect-ratio: 1.2 / 1;
    max-height: 380px;
    margin-inline: auto;
  }

  .hero-caption {
    position: static;
    max-width: min(92vw, 560px);
    margin: 0 auto;
    padding: 0 0.25rem;
    line-height: 1.5;
  }
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  nav {
    padding: 1rem 1.5rem;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    width: 100%;
    position: relative;
    left: auto;
    transform: none;
    margin-left: auto;
    margin-right: auto;
    background: transparent;
    padding: 0.75rem 0 0.5rem;
  }

  .nav-links::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 100vw;
    transform: translateX(-50%);
    background: rgba(245, 242, 235, 0.97);
    border-top: 1px solid var(--rule);
    z-index: -1;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 0.65rem 1.5rem;
    border-bottom: 1px solid var(--rule);
  }

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

  .hero-visual {
    min-height: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.9rem;
  }

  .axis-canvas {
    position: relative;
    top: auto;
    left: auto;
    width: min(92vw, 460px);
    height: auto;
    aspect-ratio: 1.2 / 1;
    max-height: 340px;
    margin-inline: auto;
  }

  .hero-caption {
    position: static;
    max-width: min(92vw, 460px);
    margin: 0 auto;
    padding: 0 0.25rem;
    line-height: 1.5;
  }

  .hero-text {
    padding: 4rem 1.5rem 2.5rem;
  }

  section {
    padding: 4rem 1.5rem;
  }

  .page-header {
    padding: 4rem 1.5rem 3rem;
  }

  .complete-loop-section,
  .environment-numbers-section {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 2.5rem 1.5rem;
  }

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

  .paradigm-cell {
    border-right: none;
    border-bottom: 1px solid rgba(245, 242, 235, 0.12);
  }

  .card-grid,
  .card-grid-3 {
    grid-template-columns: 1fr;
  }

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

  .roadmap-item {
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }

  .env-numbers {
    grid-template-columns: repeat(2, 1fr);
  }

  .env-stat {
    border-right: none;
    border-bottom: 1px solid rgba(245, 242, 235, 0.1);
  }

  .env-body {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .paper-meta {
    grid-template-columns: repeat(2, 1fr);
  }

  .paper-meta-item:nth-child(2) {
    border-right: none;
  }

  .paper-item {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 0.7rem;
  }

  .paper-arrow {
    justify-self: end;
  }

  footer {
    padding: 2rem 1.5rem;
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ── NEWSLETTER ── */
.newsletter-section {
  background: var(--accent);
  padding: 5rem 6rem;
}

.newsletter-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.newsletter-text .section-label {
  color: rgba(245, 242, 235, 0.5);
}

.newsletter-text h2 {
  color: var(--paper);
  margin-bottom: 1rem;
}

.newsletter-text p {
  color: rgba(245, 242, 235, 0.65);
  font-size: 0.95rem;
  line-height: 1.75;
}

.newsletter-fields {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.newsletter-input {
  font-family: var(--sans);
  font-size: 0.93rem;
  padding: 0.8rem 1rem;
  background: rgba(245, 242, 235, 0.08);
  border: 1px solid rgba(245, 242, 235, 0.2);
  color: var(--paper);
  border-radius: 2px;
  outline: none;
  transition: border-color 0.2s;
}

.newsletter-input::placeholder {
  color: rgba(245, 242, 235, 0.35);
}

.newsletter-input:focus {
  border-color: rgba(245, 242, 235, 0.5);
}

.newsletter-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.8rem 1.5rem;
  background: var(--accent2);
  color: var(--paper);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

.newsletter-btn:hover {
  background: #a33520;
}

.newsletter-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.newsletter-note {
  font-family: var(--mono);
  font-size: 0.63rem;
  color: rgba(245, 242, 235, 0.35);
  letter-spacing: 0.08em;
  max-width: none;
}

.newsletter-success-msg {
  font-size: 0.95rem;
  color: rgba(245, 242, 235, 0.85);
  line-height: 1.65;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(245, 242, 235, 0.25);
  background: rgba(245, 242, 235, 0.06);
  border-radius: 2px;
  max-width: none;
}

/* ── UNSUBSCRIBE ── */
.unsubscribe-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.unsubscribe-card {
  border: 1px solid var(--rule);
  background: #fff;
  padding: 2rem;
}

.unsubscribe-intro {
  color: var(--mid);
  margin-bottom: 1.5rem;
}

.unsubscribe-form {
  display: grid;
  gap: 1rem;
}

.unsubscribe-field label {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.45rem;
}

.unsubscribe-input,
.unsubscribe-textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 0.95rem;
  line-height: 1.5;
  border: 1px solid var(--rule);
  background: #fff;
  color: var(--ink);
  border-radius: 2px;
  padding: 0.72rem 0.9rem;
}

.unsubscribe-input:focus,
.unsubscribe-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.unsubscribe-textarea {
  resize: vertical;
  min-height: 112px;
}

.unsubscribe-btn {
  width: fit-content;
  border: none;
}

.unsubscribe-note {
  font-size: 0.84rem;
  color: var(--mid);
}

.unsubscribe-error {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--accent2);
}

.unsubscribe-success {
  border: 1px solid rgba(26, 58, 92, 0.25);
  background: rgba(26, 58, 92, 0.05);
  padding: 1.25rem 1.4rem;
  color: var(--ink);
  line-height: 1.65;
}

@media (max-width: 900px) {
  .newsletter-section {
    padding: 4rem 1.5rem;
  }

  .newsletter-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .newsletter-fields {
    grid-template-columns: 1fr;
  }

  .unsubscribe-card {
    padding: 1.4rem;
  }
}