/* ============================================
   martinaberastegue.com - Design System
   ============================================ */

:root {
  --color-bg: #f8f7f4;
  --color-bg-alt: #f0efe9;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #5c5c5c;
  --color-text-muted: #8a8a8a;
  --color-accent: #1a365d;
  --color-accent-hover: #12264a;
  --color-accent-light: rgba(26, 54, 93, 0.08);
  --color-border: #e2e0db;
  --color-grid: #e8e6e1;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 10rem;

  --max-width: 1120px;
  --radius: 10px;
  --radius-sm: 6px;

  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

/* ---- Container ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ---- Navbar ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(248, 247, 244, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition), background-color 0.3s ease;
}

.navbar--scrolled {
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.navbar__logo {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  white-space: nowrap;
}

.navbar__logo-dot {
  color: var(--color-accent);
}

.navbar__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}


/* ---- Language Switcher ---- */
.navbar__lang {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: border-color var(--transition);
}

.navbar__lang:hover {
  border-color: var(--color-text-muted);
}

.navbar__lang-icon {
  color: var(--color-accent);
  flex-shrink: 0;
}

.navbar__lang-link {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.navbar__lang-link:hover {
  color: var(--color-text);
}

.navbar__lang-link--active {
  color: var(--color-accent);
}

.navbar__lang-sep {
  color: var(--color-border);
  font-weight: 300;
  user-select: none;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  font-family: var(--font-main);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn--primary:hover {
  background: var(--color-accent);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text);
}

.btn--lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn--nav {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

.btn--nav .btn__icon-only {
  display: none;
}

.btn--nav .btn__label {
  display: inline;
}

/* ---- Hero ---- */
.hero {
  padding: calc(60px + var(--space-3xl)) 0 var(--space-2xl);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero__h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.hero__title {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.hero__title strong {
  font-weight: 700;
  color: var(--color-text);
}

.hero__subtitle {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 540px;
}

.hero__subtitle strong {
  color: var(--color-accent);
  font-weight: 600;
}

.hero__socials {
  display: flex;
  gap: 2rem;
  margin-top: var(--space-lg);
}

.hero__social {
  color: var(--color-text);
  font-size: 1.5rem;
  opacity: 0.6;
  transition: all var(--transition);
}

.hero__social:hover {
  color: var(--color-accent);
  opacity: 1;
  transform: translateY(-2px);
}

.hero__image {
  position: relative;
  overflow: visible;
  aspect-ratio: 4/3;
}

.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 16px;
  position: relative;
  z-index: 2;
}

.hero__image::before,
.hero__image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 16px;
  border: 1.5px solid rgba(120, 160, 210, 0.55);
  pointer-events: none;
}

.hero__image::before {
  transform: translate(-10px, -10px);
  z-index: 0;
}

.hero__image::after {
  transform: translate(10px, 10px);
  z-index: 3;
}

/* ---- Sections ---- */
.section {
  padding: var(--space-2xl) 0;
}

.section--alt {
  background-color: var(--color-bg-alt);
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 60px 60px;
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
  max-width: 800px;
}

.section__intro {
  margin-top: var(--space-sm);
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  line-height: 1.7;
}

.section--centered {
  text-align: center;
}

.section--centered .section__title {
  margin-left: auto;
  margin-right: auto;
}

.section--centered .section__intro {
  margin-left: auto;
  margin-right: auto;
}

/* ---- Logo Grid ---- */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.logo-grid__item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.logo-grid__item:hover {
  border-color: var(--color-text-muted);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.logo-grid__wrapper {
  aspect-ratio: 16/9;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.375rem;
}

.logo-grid__wrapper img {
  max-height: 100%;
  object-fit: contain;
}

.logo-grid__name {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-align: center;
}

/* ---- Filters ---- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.filters__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 100px;
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.filters__btn:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text);
}

.filters__btn--active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.filters__btn--active:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}

/* ---- Projects Grid ---- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.project-card:hover {
  border-color: var(--color-text-muted);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transform: translateY(-3px);
}

.project-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-bg-alt);
  position: relative;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.project-content {
  padding: var(--space-md);
}

.featured-overlay {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--color-accent);
  color: #fff;
  padding: 0.4rem 0.8rem;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  z-index: 10;
  letter-spacing: 0.02em;
}

.featured-overlay i {
  font-size: 0.75rem;
}

/* ---- Project Badges ---- */
.project-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  padding: 0.4rem 0.8rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.project-badge i.fa-dog { color: #8b5cf6; }
.project-badge:has(.fa-dog) { background: rgba(139, 92, 246, 0.08); }

.project-badge i.fa-shield-alt { color: #3b82f6; }
.project-badge:has(.fa-shield-alt) { background: rgba(59, 130, 246, 0.08); }

.project-badge i.fa-plane-departure,
.project-badge i.fa-plane,
.project-badge i.fa-globe { color: #ec4899; }
.project-badge:has(.fa-plane-departure),
.project-badge:has(.fa-plane),
.project-badge:has(.fa-globe) { background: rgba(236, 72, 153, 0.08); }

.project-badge i.fa-link { color: #f59e0b; }
.project-badge:has(.fa-link) { background: rgba(245, 158, 11, 0.08); }

.project-badge i.fa-briefcase { color: #10b981; }
.project-badge:has(.fa-briefcase) { background: rgba(16, 185, 129, 0.08); }

.project-badge i.fa-lock { color: #dc2626; }
.project-badge:has(.fa-lock) { background: rgba(220, 38, 38, 0.08); }

.project-badge i.fa-child { color: #ff7e5f; }
.project-badge:has(.fa-child) { background: rgba(255, 126, 95, 0.08); }

.project-badge i.fa-chart-bar { color: #8b5cf6; }
.project-badge:has(.fa-chart-bar) { background: rgba(139, 92, 246, 0.08); }

.project-badge i.fa-code { color: #0d9488; }
.project-badge:has(.fa-code) { background: rgba(13, 148, 136, 0.08); }

.project-title {
  color: var(--color-text);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.project-description {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.55;
}

.stealth-projects {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: var(--space-lg);
  font-style: italic;
}

/* ---- Contact Section ---- */
.section--contact {
  text-align: center;
  background-color: var(--color-bg-alt);
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 60px 60px;
}

.section--contact .section__title {
  margin-left: auto;
  margin-right: auto;
  max-width: none;
}

.section--contact .section__intro {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--space-lg);
}

/* ---- Notes Section ---- */
.notes-list {
  margin-top: var(--space-lg);
}

.note-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  text-decoration: none;
  color: var(--color-text);
  transition: color var(--transition);
}

.note-row + .note-row {
  border-top: 1px solid var(--color-border);
}

.note-row:hover {
  color: var(--color-accent);
}

.note-row__text {
  flex: 1;
  min-width: 0;
}

.note-row__title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.2rem;
}

.note-row__desc {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.note-row__arrow {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.note-row:hover .note-row__arrow {
  color: var(--color-accent);
  transform: translateX(4px);
}

.lang-badge {
  display: inline-block;
  font-size: 0.55em;
  font-weight: 700;
  letter-spacing: 0.06em;
  vertical-align: middle;
  padding: 0.15em 0.5em;
  border-radius: 100px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  margin-left: 0.4em;
}

/* ---- Notes Page ---- */
.notes-page {
  padding-top: calc(var(--space-3xl) + 2rem);
}

.notes-page__intro {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: var(--space-xl);
}

.notes-page__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.article-card {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.25s ease;
}

.article-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.article-card__image {
  flex-shrink: 0;
  width: 240px;
  height: 160px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.3s ease;
}

.article-card:hover .article-card__image img {
  transform: scale(1.03);
}

.article-card__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.article-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.35rem;
}

.article-card__meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.article-card__desc {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

@media (max-width: 640px) {
  .article-card {
    flex-direction: column;
  }

  .article-card__image {
    width: 100%;
    height: 180px;
  }
}

/* ---- Article Page ---- */
body.page-article {
  background-image: none;
}

.article-page {
  padding-top: calc(var(--space-3xl) + 2rem);
}

.article-page .container {
  max-width: 800px;
}

.article-header {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}

.article-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.article-image {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-content {
  font-size: 1.1rem;
  line-height: 1.8;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.02em;
}

.article-content h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 2rem 0 1rem;
}

.article-content ul,
.article-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.article-content code {
  background: var(--color-bg-alt);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}

.article-content pre {
  background: var(--color-bg-alt);
  padding: 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
}

.article-content pre code {
  background: none;
  padding: 0;
}

.article-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-content a:hover {
  color: var(--color-accent-hover);
}

.article-content p img {
  display: inline;
  vertical-align: middle;
  margin: 0 0.15em;
  height: 1em;
  width: 1em;
  border-radius: 3px;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.mermaid {
  text-align: center;
  margin: 2em 0;
  padding: 20px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.highlight-text {
  background: rgba(26, 54, 93, 0.1);
  padding: 2px 4px;
  border-radius: 4px;
}

.note-text {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.95em;
}

.alert.notice {
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent);
  color: var(--color-text);
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}

/* Table of Contents */
.table-of-contents {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  position: relative;
}

.table-of-contents h2 {
  font-size: 1.25rem;
  margin: 0 0 1rem 0;
}

.table-of-contents ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.table-of-contents > ul > li {
  margin-bottom: 0.6rem;
}

.table-of-contents ul ul {
  margin: 0.4rem 0 0.4rem 1.5rem;
}

.table-of-contents ul ul li {
  margin-bottom: 0.3rem;
  font-size: 0.95em;
}

.table-of-contents a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

.table-of-contents a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.table-of-contents .toc-hidden {
  display: none !important;
}

.table-of-contents.toc-collapsed .toc-hidden {
  display: none !important;
}

.table-of-contents.js-toc-expanded .toc-hidden {
  display: block !important;
}

.table-of-contents.toc-collapsed > ul {
  max-height: 7.8rem;
  overflow: hidden;
  position: relative;
}

.table-of-contents.toc-collapsed > ul::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3rem;
  background: linear-gradient(to bottom, transparent, var(--color-surface) 90%);
  pointer-events: none;
}

.toc-subsection {
  display: none;
}

.toc-subsection.expanded {
  display: block;
}

.table-of-contents .toc-expand-button {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 0.75rem 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-accent);
  opacity: 0.8;
  transition: opacity var(--transition);
  margin-top: 1rem;
  font-size: inherit;
  font-family: var(--font-main);
}

.table-of-contents .toc-expand-button:hover {
  opacity: 1;
}

.table-of-contents.toc-collapsed .toc-expand-button {
  display: flex !important;
}

.toc-expand-button i {
  transition: transform var(--transition);
  font-size: 1em;
}

.toc-expand-button.expanded i {
  transform: rotate(180deg);
}

.toc-toggle {
  cursor: pointer;
  margin-left: 0.5rem;
}

.toc-toggle i {
  transition: transform var(--transition);
  color: var(--color-accent);
  font-size: 1em;
  opacity: 0.8;
}

.toc-toggle:hover i {
  opacity: 1;
}

.toc-toggle.expanded i {
  transform: rotate(180deg);
}

.toc-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Author Section */
.author-section {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.author-image {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
}

.author-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-info h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.author-info p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.author-social {
  display: flex;
  gap: 0.75rem;
}

.author-social a {
  color: var(--color-text-muted);
  transition: color var(--transition);
  font-size: 1.1rem;
}

.author-social a:hover {
  color: var(--color-accent);
}

/* Sources / Citations */
.sources-section {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.citation-ref,
.source-ref {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 0.8em;
  vertical-align: super;
}

.image-container,
.logo-container {
  text-align: center;
  margin: 2rem 0;
}

[id] {
  scroll-margin-top: 5rem;
}

@media (max-width: 768px) {
  .article-title {
    font-size: 1.75rem;
  }

  .article-content {
    font-size: 1rem;
  }

  .author-section {
    flex-direction: column;
    text-align: center;
    padding: var(--space-md);
  }

  .author-social {
    justify-content: center;
  }
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.footer__logo {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ---- Fade-in Animation ---- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .logo-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-sm);
  }

  .hero {
    padding: calc(60px + var(--space-2xl)) 0 var(--space-xl);
  }

  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-lg);
  }

  .hero__content {
    order: 2;
  }

  .hero__image {
    order: 1;
  }

  .hero__subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__socials {
    justify-content: center;
    gap: 2.5rem;
  }

  .hero__social {
    font-size: 1.75rem;
  }

  .section {
    padding: var(--space-xl) 0;
  }

  .section__title {
    max-width: none;
  }

  .logo-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
  }

  .logo-grid__item {
    padding: 0.5rem;
    gap: 0.375rem;
  }

  .logo-grid__name {
    font-size: 0.7rem;
  }

  .filters {
    gap: 0.375rem;
  }

  .filters__btn {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
  }

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

  .featured-overlay {
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.3rem 0.6rem;
  }

  .btn--nav {
    padding: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
    justify-content: center;
    border-radius: var(--radius-sm);
  }

  .btn--nav .btn__icon-only {
    display: block;
    font-size: 1.15rem;
  }

  .btn--nav .btn__label {
    display: none;
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .footer__brand {
    flex-direction: column;
    gap: var(--space-xs);
  }
}