:root {
  /* === CORES PRINCIPAIS === */
  --color-black: #000;
  --color-white: #fff;
  --color-gray-dark: #0a0a0a;
  --color-gray-darker: #111;
  --color-gray-medium: #1a1a1a;
  --color-gray-light: #222;
  --color-gray-lighter: #2a2a2a;

  /* === CORES DE TEXTO === */
  --text-primary: #f5f5f5;
  --text-secondary: #ececec;
  --text-tertiary: #ddd;
  --text-muted: #cfcfcf;
  --text-dim: #ccc;
  --text-dimmer: #bbb;
  --text-faded: #aaa;
  --text-very-faded: #999;
  --text-ultra-faded: #888;
  --text-ghost: #777;

  /* === CORES DE DESTAQUE === */
  --color-link: #9ae6b4;
  --color-hover: #e5e5e5;

  /* === CARDS === */
  --card-radius: 8px;

  /* === TIPOGRAFIA === */
  --font-family: 'Inter', sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;

  /* === ESPAÇAMENTOS === */
  --spacing-xs: 0.3rem;
  --spacing-sm: 0.4rem;
  --spacing-md: 0.8rem;
  --spacing-lg: 1.2rem;
  --spacing-xl: 1.5rem;
  --spacing-2xl: 2rem;
  --spacing-3xl: 3rem;
  --spacing-4xl: 4rem;
  --spacing-5xl: 5rem;
  --spacing-7xl: 7rem;
  --spacing-7-5xl: 7.5rem;
  --spacing-15xl: 15rem;

  /* === TAMANHOS DE FONTE === */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.85rem;
  --font-size-base: 0.9rem;
  --font-size-md: 0.95rem;
  --font-size-lg: 1rem;
  --font-size-xl: 1.05rem;
  --font-size-2xl: 1.3rem;
  --font-size-3xl: 1.8rem;
  --font-size-4xl: 2.4rem;
  --font-size-5xl: 3.2rem;
  --font-size-6xl: 4.2rem;
  --font-size-7xl: 5.6rem;

  /* === TRANSIÇÕES === */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.25s ease;
  --transition-slow: 0.3s ease;
  --transition-slower: 0.5s;
  --transition-flip: 0.6s;

  /* === BORDAS === */
  --border-width: 1px;
  --border-width-thick: 2px;
  --border-style: solid;
  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 12px;
  --border-radius-full: 999px;

  /* === LAYOUT === */
  --content-max-width: 1350px;
  --newsletter-intro-max-width: 700px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: var(--font-family);
}

body {
  display: flex;
  background-color: var(--color-black);
  color: var(--text-primary);
  min-height: 100vh;
}

/* === LOADING === */
#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-black);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--color-gray-light);
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* === TEXT HIGHLIGHT === */
::selection {
  background-color: var(--color-white);
  color: var(--color-black);
}

/* === SIDEBAR === */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-black);
  border-bottom: none;
  z-index: 100;
  padding: clamp(1rem, 3vh, 2rem) clamp(1.5rem, 4vw, 3rem);
}

.sidebar-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  width: 100%;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.nav a {
  font-size: clamp(0.53rem, 1.2vw, 0.9rem);
  font-weight: var(--font-weight-normal);
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 0.05rem;
  transition: opacity var(--transition-fast);
  white-space: nowrap;
}

.nav:has(a:hover) a:not(:hover) {
  color: var(--text-faded);
}

.nav a:hover {
  color: var(--color-white);
  border-bottom: none;
}

/* === CONTENT === */
.content {
  margin-left: var(--sidebar-width);
  padding: 0 clamp(1.5rem, 4vw, 3rem);
  padding-right: clamp(1.5rem, 4vw, 3rem);
  justify-content: center;
  display: flex;
  flex-direction: column;
  flex: 1;
  align-items: center;
}

.content > * {
  max-width: var(--content-max-width);
  width: 100%;
}

/* === HERO SECTION === */
.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: clamp(2vh, 5vh, 5vh);
}

.hero-inner {
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.hero-name {
  font-size: clamp(2.2rem, 8vw, 5.6rem);
  font-weight: var(--font-weight-normal);
  letter-spacing: clamp(-0.05rem, -0.15vw, -0.1rem);
  margin-bottom: clamp(5rem, 20vh, 15rem);
  line-height: 1;
  text-align: center;
}

.hero-description {
  max-width: clamp(400px, 55vw, 630px);
  margin-bottom: clamp(2rem, 5vh, 4rem);
  align-self: flex-start;
}

.hero-description p {
  color: var(--text-muted);
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  text-align: left;
  line-height: 1.6;
  margin-bottom: clamp(1rem, 2vh, 1.5rem);
  text-wrap: balance;
}

.hero-footer {
  display: flex;
  font-size: clamp(0.53rem, 1.2vw, 0.93rem);
  gap: clamp(2rem, 10vw, 7rem);
  color: var(--text-primary);
  margin-top: clamp(1rem, 3vh, 2rem);
  letter-spacing: 0.05rem;
  align-self: flex-start;
}

/* === SECTION === */
.section {
  scroll-margin-top: 8rem;
  margin-top: var(--spacing-7-5xl);
  margin-bottom: 15rem;
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-2xl);
  padding-left: 0;
  text-align: center;
}

.section-description {
  color: var(--text-dim);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
  line-height: 1.6;
  text-align: center;
  max-width: 850px;
  margin-left: auto;
  margin-right: auto;
}

/* === CARD GRID === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  justify-items: stretch;
}

/* === RESEARCH HERO === */
.research-hero {
  display: grid;
  grid-template-columns: 49% 1fr;
  gap: var(--spacing-5xl);
  margin-bottom: var(--spacing-5xl);
  align-items: center;
}

/* Variante com imagem à direita */
.research-hero.reverse {
  grid-template-columns: 1fr 49%;
}

.research-hero.reverse .research-hero-image {
  order: 2;
}

.research-hero.reverse .research-hero-content {
  order: 1;
  margin-left: auto;
}

.research-hero-image img {
  width: 100%;
  height: clamp(380px, 45vw, 580px);
  object-fit: cover;
  border-radius: var(--border-radius-md);
  display: block;
}

.research-hero-content {
  display: flex;
  max-width: 500px;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.research-hero-headline {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  line-height: 1.3;
}

.research-hero-description {
  color: var(--text-muted);
  font-size: var(--font-size-base);
  line-height: 1.6;
}

.research-hero-description p {
  margin-bottom: var(--spacing-lg);
}

.research-hero-description p:last-child {
  margin-bottom: 0;
}

.research-hero-description a {
  color: var(--color-link);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-bottom: var(--border-width) var(--border-style) transparent;
  transition: all var(--transition-fast);
}

.research-hero-description a:hover {
  border-bottom: var(--border-width) var(--border-style) var(--color-link);
}

.projects-intro {
  margin-bottom: var(--spacing-5xl);
  text-align: center;
  color: var(--text-muted);
}

.projects-intro-container {
  max-width: 850px;
  margin: 0 auto;
}

.projects-intro h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.projects-intro p {
  font-size: var(--font-size-base);
  line-height: 1.6;
}

/* === NOTE CARD === */
.note-card {
  background: var(--color-gray-darker);
  border-radius: var(--card-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  grid-column: span 2;
  height: 100%;
}

.note-card-image {
  background-color: var(--color-gray-darker);
  padding: 8px;
}

.note-card-image img {
  width: 100%;
  aspect-ratio: 5 / 1;
  object-fit: cover;
  border-radius: var(--border-radius-md);
  display: block;
}

.note-card-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.note-card-body h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.note-card-body p {
  color: var(--text-muted);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-lg);
  line-height: 1.4;
}

.note-card-body a {
  color: var(--color-link);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-bottom: var(--border-width) var(--border-style) transparent;
  transition: all var(--transition-fast);
}

.note-card-body a:hover {
  border-bottom: var(--border-width) var(--border-style) var(--color-link);
}

/* === COMPOSITION CARDS === */
.composition-card-image {
  background-color: var(--color-gray-darker);
  border: 8px solid var(--color-gray-darker);
  border-radius: var(--border-radius-xl);
  background-size: 200% 100%;
  background-repeat: no-repeat;
  background-position: center;
  overflow: hidden;
}

.composition-card-image img {
  display: none;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--border-radius-md);
}

/* Image slicing for #research section */
#research .oa-card:nth-child(1) .composition-card-image {
  background-image: url('docs/pale-blue-dot.jpg');
  background-position: 0% 0;
}

#research .oa-card:nth-child(2) .composition-card-image {
  background-image: url('docs/pale-blue-dot.jpg');
  background-position: 50% 0;
}

#research .oa-card:nth-child(3) .composition-card-image {
  background-image: url('docs/pale-blue-dot.jpg');
  background-position: 100% 0;
}

/* === FLIP CARD EFFECT === */
.flip-container {
  perspective: 1000px;
  cursor: pointer;
}

.flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  transition: transform var(--transition-flip);
  transform-style: preserve-3d;
}

.flip-container:hover .flip-inner {
  transform: rotateY(180deg);
}

.flip-front,
.flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--border-radius-md);
}

.flip-front {
  background-image: url('assets/cards/pale-blue-dot.jpg');
  background-position: 100% 0;
  background-size: 200% 100%;
  background-repeat: no-repeat;
}

.flip-back {
  background-image: url('assets/cards/pale-blue-dot.jpg');
  background-position: 100% 0;
  background-size: 200% 100%;
  background-repeat: no-repeat;
  transform: rotateY(180deg);
  background-color: var(--color-gray-dark);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
  overflow: hidden;
}

.flip-back img {
  width: 100%;
  height: 50%;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-lg);
}

.flip-back-text {
  text-align: center;
  color: var(--text-tertiary);
}

.flip-back-text p {
  font-size: var(--font-size-sm);
  line-height: 1.4;
  margin-top: var(--spacing-5xl);
  font-style: italic;
}

.flip-back-text .context-text {
  font-size: var(--font-size-xs);
  color: var(--text-faded);
  font-style: normal;
  padding-bottom: var(--spacing-3xl);
}

/* === CARDS === */
.oa-card {
  background: var(--color-gray-darker);
  border-radius: var(--card-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card-image {
  background-color: var(--color-gray-darker);
  padding: 8px;
  position: relative;
}

/* === YEAR BADGE === */
.card-year {
  position: absolute;
  bottom: 14px;
  right: 10px;
  color: var(--text-primary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  padding: 2px 8px;
  border-radius: var(--border-radius-sm);
  letter-spacing: 0.04em;
  /*backdrop-filter: blur(4px);*/
  /*background: rgba(0, 0, 0, 0.52);*/
  pointer-events: none;
  user-select: none;
}

.card-image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--border-radius-md);
  display: block;
}

/* === CARD BODY === */
.card-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-grow: 1;
}

.card-body h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.card-body p {
  color: var(--text-muted);
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-lg);
  line-height: 1.4;
  flex-grow: 1;
}

/* === BUTTONS === */
.card-buttons {
  display: flex;
  gap: var(--spacing-md);
}

.btn {
  display: inline-flex;
  margin-top: 1rem;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  flex: 1;
  padding: 0.65rem 0.8rem;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  gap: var(--spacing-sm);
}

.btn.white {
  background: var(--color-white);
  color: var(--color-black);
  position: relative;
  overflow: hidden;
}

.btn.white:before {
  content: '';
  top: 0;
  position: absolute;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,0,0,0.2), transparent);
  transition: left var(--transition-slower);
}

.btn.white:hover::before {
  left: 100%;
}

.btn.white:hover {
  background: var(--color-hover);
}

.btn.dark {
  background: var(--color-gray-light);
  color: var(--color-white);
}

.btn.dark:hover {
  background: var(--color-gray-lighter);
}

/* === CONTACT SECTION === */
.contact-list {
  margin-top: 80px;
  border-top: var(--border-width) var(--border-style) var(--color-gray-light);
}

.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: var(--border-width) var(--border-style) var(--color-gray-light);
  text-decoration: none;
  color: var(--text-faded);
  font-size: var(--font-size-lg);
  transition: background-color var(--transition-medium);
  padding: var(--spacing-md) var(--spacing-2xl) var(--spacing-md) var(--spacing-2xl);
}

.contact-row:hover {
  background-color: var(--color-gray-dark);
  color: var(--color-white);
}

.contact-row:hover span {
  transform: translateX(10px);
}

.contact-row:hover svg {
  transform: translateX(-10px);
}

/* === NEWSLETTER === */
.newsletter-container {
  max-width: var(--content-max-width);
  margin: var(--spacing-7xl) auto;
  width: calc(100% - var(--spacing-4xl));
}

.newsletter-intro {
  text-align: center;
  margin-bottom: var(--spacing-5xl);
  max-width: var(--newsletter-intro-max-width);
  margin: 0 auto;
}

.newsletter-intro h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-7-5xl) 0 var(--spacing-xl) 0;
}

.newsletter-intro p {
  color: var(--text-muted);
  line-height: 1.5;
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  margin-bottom: var(--spacing-4xl);
  text-wrap: balance;
  text-align: center;
}

.newsletter-footer {
  color: var(--text-muted);
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  text-wrap: balance;
  text-align: center;
  margin-top: var(--spacing-2xl);
}

.newsletter-footer a {
  color: var(--color-link);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border-bottom: var(--border-width) var(--border-style) transparent;
  transition: all var(--transition-fast);
}

.newsletter-footer a:hover {
  border-bottom: var(--border-width) var(--border-style) var(--color-link);
}

/* === FILTER BAR === */
.filter-bar {
  display: flex;
  width: fit-content;
  margin: 0 auto var(--spacing-3xl);
  gap: 1.5rem;
  padding: 0.3rem;
  flex-wrap: nowrap;
  border: var(--border-width) var(--border-style) var(--color-gray-light);
  border-radius: 999px;
}

.filter-btn {
  background: none;
  border: none;
  color: var(--text-faded);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  padding: 0.4em 1.1em;
  border-radius: 999px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-white);
  background: var(--color-gray-medium);
}

.filter-btn.active {
  color: var(--color-white);
  background: var(--color-gray-lighter);
}

/* === PAPERS LIST === */
.papers-list {
  display: flex;
  flex-direction: column;
}

/* === RESEARCH CATEGORIES (for filtered content) === */
.research-category {
  display: block;
  margin-bottom: var(--spacing-4xl);
  animation: fadeIn var(--transition-slow);
}

.research-category[style*="display: none"] {
  display: none !important;
}

.paper {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 2rem;
  padding: var(--spacing-2xl) 0;
  border-bottom: var(--border-width) var(--border-style) var(--color-gray-light);
  cursor: pointer;
  transition: background-color var(--transition-medium);
}

.paper:hover {
  background-color: var(--color-gray-dark);
}

/* === PAPER META === */
.paper-meta {
  font-size: var(--font-size-base);
  color: var(--text-very-faded);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: var(--spacing-xs);
  padding: 0 0 0 var(--spacing-2xl);
}

.paper-meta .keyword {
  color: var(--color-white);
  font-weight: var(--font-weight-medium);
}

.paper-meta .date {
  color: var(--text-ultra-faded);
}

.paper-meta .journal {
  color: var(--text-ghost);
  font-style: italic;
}

/* === PAPER CONTENT === */
.paper-content {
  display: flex;
  flex-direction: column;
  padding: 0 var(--spacing-2xl) 0 0;
}

.paper-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.paper-authors {
  font-size: var(--font-size-base);
  color: var(--text-dimmer);
  margin-bottom: var(--spacing-md);
}

.paper-tldr {
  color: var(--text-tertiary);
  font-size: var(--font-size-base);
  line-height: 1.5;
}

.paper-abstract {
  display: none;
  margin-top: var(--spacing-lg);
  color: var(--text-faded);
  line-height: 1.6;
  font-size: var(--font-size-base);
  animation: fadeIn var(--transition-slow);
}

.paper.expanded .paper-abstract {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === RESPONSIVE === */

/* Tablets grandes (769px - 1024px): 2 colunas */
@media (max-width: 1024px) and (min-width: 769px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablets (768px ou menos) */
@media (max-width: 768px) {
  .sidebar {
    padding: var(--spacing-lg) var(--spacing-xl);
  }

  .sidebar-inner {
    justify-content: flex-end;
  }

  .nav {
    flex-direction: row;
    gap: var(--spacing-lg);
    margin: 0;
  }

  .content {
    margin-left: 0;
  }

  .section {
    margin-top: var(--spacing-3xl);
    margin-bottom: 8rem;
  }

  .section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .note-card {
    grid-column: span 1;
  }

  .research-hero {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  /* Reset da variante reverse em tablets */
  .research-hero.reverse {
    grid-template-columns: 1fr;
  }

  .research-hero.reverse .research-hero-image,
  .research-hero.reverse .research-hero-content {
    order: 0;
  }

  .research-hero-headline {
    font-size: var(--font-size-xl);
  }

  .projects-intro h2 {
    font-size: var(--font-size-xl);
  }

  /* Newsletter responsive */
  .newsletter-container {
    width: calc(100% - var(--spacing-3xl));
    padding: 0;
  }

  .paper {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .paper-meta {
    padding: 0;
  }

  .paper-content {
    padding: 0;
  }
}

/* Mobile pequeno (520px ou menos) */
@media (max-width: 520px) {
  .sidebar {
    padding: var(--spacing-lg);
  }

  .sidebar-inner {
    justify-content: flex-end;
  }

  .nav {
    flex-direction: row;
    gap: var(--spacing-xs);
    margin: 0;
  }

  .nav a:first-child {
    display: none;
  }

  .section {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-5xl);
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
  }

  .section-description {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-2xl);
  }

  .card-grid {
    gap: var(--spacing-lg);
  }

  .card-body,
  .note-card-body {
    padding: var(--spacing-lg);
  }

  .card-body h3,
  .note-card-body h3 {
    font-size: var(--font-size-md);
  }

  .card-body p,
  .note-card-body p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
  }

  .card-buttons {
    gap: 0.5rem;
    flex-direction: column;
  }

  .btn {
    padding: 0.6rem 0.7rem;
    font-size: 0.8rem;
  }

  .research-hero-headline {
    font-size: var(--font-size-lg);
  }

  .projects-intro h2 {
    font-size: var(--font-size-lg);
  }

  .research-hero-description {
    font-size: var(--font-size-sm);
  }

  /* Newsletter mobile */
  .newsletter-container {
    padding: 0;
    width: calc(100% - var(--spacing-2xl));
    margin: var(--spacing-4xl) auto;
  }

  .newsletter-intro h1 {
    font-size: 1.5rem;
    padding: var(--spacing-4xl) 0 var(--spacing-2xl) 0;
  }

  .newsletter-intro p {
    font-size: var(--font-size-base);
  }

  .newsletter-intro .note {
    font-size: var(--font-size-base);
  }


  .filter-bar {
    border: none;
    flex-direction: column;
    width: 100%;
    align-items: stretch;
    border-radius: 0;
  }

  .filter-btn {
    font-size: var(--font-size-sm);
    border: var(--border-width) var(--border-style) var(--color-gray-light);
    border-radius: 999px;
    text-align: center;
  }

  .paper {
    padding: var(--spacing-lg) 0;
  }

  .paper-title {
    font-size: var(--font-size-base);
  }

  .paper-authors,
  .paper-tldr,
  .paper-abstract {
    font-size: var(--font-size-sm);
  }

  .paper-meta {
    font-size: var(--font-size-sm);
  }
}