/* ==========================================================================
   Rahul Verma — Portfolio (dark default, light optional)
   ========================================================================== */

:root,
[data-theme="dark"] {
  --bg: #0b0f14;
  --surface: #141a22;
  --surface-raised: #1a2332;
  --text: #e8edf4;
  --text-muted: #8b9cb3;
  --accent: #3d9eff;
  --accent-hover: #6bb3ff;
  --accent-soft: rgba(61, 158, 255, 0.12);
  --highlight: #5eead4;
  --border: #1e2a3a;
  --nav-bg: rgba(11, 15, 20, 0.85);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.45);
  --bg-glow-1: rgba(61, 158, 255, 0.14);
  --bg-glow-2: rgba(94, 234, 212, 0.09);
  --bg-glow-3: rgba(61, 158, 255, 0.07);
  --bg-graph-edge: rgba(94, 234, 212, 0.14);
  --bg-graph-node: rgba(61, 158, 255, 0.35);
  --radius: 12px;
  --radius-sm: 8px;
  --nav-height: 4rem;
  --max-width: 1100px;
  --prose-width: 720px;
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --transition: 0.2s ease;
}

[data-theme="light"] {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --surface-raised: #f0f3f8;
  --text: #1a2332;
  --text-muted: #5a6b82;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --highlight: #0d9488;
  --border: #d8e0ea;
  --nav-bg: rgba(248, 249, 251, 0.92);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 28px rgba(0, 0, 0, 0.12);
  --bg-glow-1: rgba(37, 99, 235, 0.08);
  --bg-glow-2: rgba(13, 148, 136, 0.06);
  --bg-glow-3: rgba(37, 99, 235, 0.05);
  --bg-graph-edge: rgba(37, 99, 235, 0.1);
  --bg-graph-node: rgba(37, 99, 235, 0.22);
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

.site-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.site-bg__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.9;
}

.site-bg__glow--1 {
  top: -12%;
  left: -8%;
  width: 42vw;
  height: 42vw;
  background: var(--bg-glow-1);
}

.site-bg__glow--2 {
  right: -10%;
  top: 28%;
  width: 36vw;
  height: 36vw;
  background: var(--bg-glow-2);
}

.site-bg__glow--3 {
  bottom: -18%;
  left: 32%;
  width: 48vw;
  height: 48vw;
  background: var(--bg-glow-3);
}

.site-bg__graph {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
  mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, black 10%, transparent 72%);
}

.site-bg__edges line {
  stroke: var(--bg-graph-edge);
  stroke-width: 1.2;
}

.site-bg__nodes circle {
  fill: var(--bg-graph-node);
}

html[data-theme="light"] .site-bg__graph {
  opacity: 0.4;
}

@media (prefers-reduced-motion: no-preference) {
  .site-bg__glow--1 {
    animation: bg-drift-1 28s ease-in-out infinite alternate;
  }

  .site-bg__glow--2 {
    animation: bg-drift-2 34s ease-in-out infinite alternate;
  }

  .site-bg__glow--3 {
    animation: bg-drift-3 30s ease-in-out infinite alternate;
  }
}

@keyframes bg-drift-1 {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(3vw, 2vh) scale(1.06); }
}

@keyframes bg-drift-2 {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-2vw, 3vh) scale(1.04); }
}

@keyframes bg-drift-3 {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(2vw, -2vh) scale(1.05); }
}

main,
.footer {
  position: relative;
  z-index: 1;
}

main {
  min-height: calc(100vh - var(--nav-height));
}

.page-panel {
  display: none;
}

.page-panel.is-active {
  display: block;
  animation: page-in 0.3s ease;
}

@keyframes page-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .page-panel.is-active { animation: none; }
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus { top: 1rem; }

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
}

.section--alt {
  background: var(--surface);
}

.section__header {
  margin-bottom: 2.5rem;
}

.section__eyebrow {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.section__title {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.nav__brand {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

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

.nav__right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav__toggle,
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.nav__toggle:hover,
.theme-toggle:hover {
  color: var(--text);
  border-color: var(--accent);
}

.theme-toggle__icon {
  font-size: 1.125rem;
  line-height: 1;
}

.nav__toggle-icon,
.nav__toggle-icon::before,
.nav__toggle-icon::after {
  display: block;
  width: 1.125rem;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__toggle-icon { position: relative; }

.nav__toggle-icon::before,
.nav__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav__toggle-icon::before { top: -6px; }
.nav__toggle-icon::after { top: 6px; }

.nav__toggle[aria-expanded="true"] .nav__toggle-icon { background: transparent; }
.nav__toggle[aria-expanded="true"] .nav__toggle-icon::before { top: 0; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-icon::after { top: 0; transform: rotate(-45deg); }

.nav__menu {
  display: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.nav__menu.is-open { display: flex; }

.nav__link {
  display: block;
  padding: 0.625rem 0.75rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--text);
  background: var(--accent-soft);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--bg) !important;
  background: var(--accent);
  border-radius: var(--radius-sm);
}

.nav__cta:hover {
  background: var(--accent-hover);
  color: var(--bg) !important;
}

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

  .nav__menu {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 0.25rem;
    padding: 0;
    background: transparent;
    border: none;
  }

  .nav__link { padding: 0.5rem 0.875rem; }
}

@media (max-width: 767px) {
  .nav__right {
    position: static;
  }

  .nav__menu {
    left: 0;
    right: 0;
  }
}

/* Hero */
.hero {
  padding: calc(var(--nav-height) + 4rem) 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero__grid--merged {
  padding-top: calc(var(--nav-height) + 1rem);
  margin-bottom: 3rem;
  position: relative;
}

.hero__grid--merged::before {
  content: "";
  position: absolute;
  inset: -2rem 0 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(61, 158, 255, 0.15), transparent),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(94, 234, 212, 0.06), transparent);
  pointer-events: none;
  z-index: 0;
}

[data-theme="light"] .hero__grid--merged::before {
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(37, 99, 235, 0.08), transparent),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(13, 148, 136, 0.05), transparent);
}

.hero__grid--merged > * {
  position: relative;
  z-index: 1;
}

.section__header--merged {
  margin-top: 0;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(61, 158, 255, 0.15), transparent),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(94, 234, 212, 0.06), transparent);
  pointer-events: none;
}

[data-theme="light"] .hero::before {
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(37, 99, 235, 0.08), transparent),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(13, 148, 136, 0.05), transparent);
}

.hero__grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: 1fr auto;
    gap: 3rem;
  }
}

.hero__content { max-width: 640px; }

.hero__eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--highlight);
  background: rgba(94, 234, 212, 0.1);
  border: 1px solid rgba(94, 234, 212, 0.2);
  border-radius: 999px;
}

[data-theme="light"] .hero__eyebrow {
  background: rgba(13, 148, 136, 0.08);
  border-color: rgba(13, 148, 136, 0.2);
}

.hero__title {
  margin: 0 0 0.5rem;
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero__role {
  margin: 0 0 1rem;
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 500;
  color: var(--text-muted);
}

.hero__tagline {
  margin: 0 0 1.75rem;
  font-size: 1.125rem;
  line-height: 1.6;
}

.hero__tagline em {
  font-style: normal;
  color: var(--accent);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

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

.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

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

.btn--secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.hero__social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__social a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition);
}

.hero__social a:hover {
  color: var(--text);
  border-color: var(--accent);
}

.hero__avatar {
  width: 220px;
  height: 220px;
  margin-inline: auto;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 40%;
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
}

@media (min-width: 768px) {
  .hero__avatar { width: 260px; height: 260px; }
}

/* About */
.about__grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1.4fr 1fr;
    gap: 3rem;
  }
}

.about__prose p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  text-align: justify;
}

.about__prose p:last-child { margin-bottom: 0; }
.about__prose a { font-weight: 500; }

.about__card + .about__card { margin-top: 1.5rem; }

.about__card {
  padding: 1.5rem;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background var(--transition), border-color var(--transition);
}

.about__card h3 {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.about__list li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.625rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.about__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.about__edu-item { margin-bottom: 1.25rem; }
.about__edu-item:last-child { margin-bottom: 0; }

.about__edu-degree {
  margin: 0;
  font-weight: 600;
  color: var(--text);
}

.about__edu-school {
  margin: 0.125rem 0 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Skills */
.skills__groups {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .skills__groups { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .skills__groups { grid-template-columns: repeat(3, 1fr); }
}

.skills__intro {
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  max-width: var(--prose-width);
}

.skills__subtitle {
  margin: 0 0 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.skill-projects {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .skill-projects {
    grid-template-columns: repeat(2, 1fr);
  }
}

.skill-project {
  padding: 1.25rem;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.skill-project:hover {
  border-color: rgba(61, 158, 255, 0.35);
  box-shadow: var(--shadow);
}

.skill-project--featured {
  border-color: rgba(94, 234, 212, 0.35);
  box-shadow: 0 0 0 1px rgba(94, 234, 212, 0.08), var(--shadow);
}

.skill-project__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.skill-project__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
}

.skill-project__title a {
  color: var(--text);
}

.skill-project__title a:hover {
  color: var(--accent);
}

.skill-project__langs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.skill-project__langs span {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.skill-project__desc {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.skill-project__desc code {
  font-size: 0.8125rem;
  padding: 0.1rem 0.35rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.skill-project__workflow {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: ui-monospace, monospace;
}

.skill-project__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-project__links a {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid rgba(61, 158, 255, 0.35);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

.skill-project__links a:hover {
  color: #fff;
  background: var(--accent);
}

.skills__group {
  padding: 1.5rem;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background var(--transition), border-color var(--transition);
}

.skills__group h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
}

.skills__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-block;
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.tag--highlight {
  color: var(--accent);
  border-color: rgba(61, 158, 255, 0.35);
  background: var(--accent-soft);
}

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.filter-btn:hover,
.filter-btn.is-active {
  color: var(--text);
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* Project grid */
.projects {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.project-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(61, 158, 255, 0.3);
}

.project-card.is-hidden { display: none; }

.project-card--featured {
  border-color: rgba(94, 234, 212, 0.35);
  box-shadow: 0 0 0 1px rgba(94, 234, 212, 0.08), var(--shadow);
}

.project-card__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg);
}

.project-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.project-card:hover .project-card__media img {
  transform: scale(1.03);
}

.project-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.25rem;
}

.project-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.project-card__badge {
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border-radius: 999px;
}

.project-card__badge--featured {
  color: var(--highlight);
  background: rgba(94, 234, 212, 0.12);
  border: 1px solid rgba(94, 234, 212, 0.25);
}

.project-card__badge--type {
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
}

.project-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.4;
}

.project-card__title a { color: var(--text); }
.project-card__title a:hover { color: var(--accent); }

.project-card__authors {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.project-card__summary {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  flex: 1;
}

.project-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-card__link {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid rgba(61, 158, 255, 0.35);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

.project-card__link:hover {
  color: #fff;
  background: var(--accent);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 1.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: var(--border);
}

.timeline__item {
  position: relative;
  padding-bottom: 1.75rem;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.45rem;
  width: 10px;
  height: 10px;
  margin-left: -4px;
  background: var(--accent);
  border: 2px solid var(--bg);
  border-radius: 50%;
}

.timeline__year {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
}

.timeline__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.timeline__detail {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Footer */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  transition: border-color var(--transition);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

@media (min-width: 640px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
}

.footer__icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  color: var(--text-muted);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.footer__icon-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.footer__icon-link svg {
  width: 1.125rem;
  height: 1.125rem;
  fill: currentColor;
}

.footer__icon-link img {
  width: 1.125rem;
  height: 1.125rem;
  object-fit: contain;
}

.footer__icon-link--brand {
  background: transparent;
}

html[data-theme="dark"] .footer__icon-link--brand img {
  filter: brightness(0) invert(1);
  opacity: 0.88;
}