:root {
  --ink: #10100e;
  --paper: #f3efe5;
  --bone: #fff9ee;
  --lime: #c9ff36;
  --oxide: #d44731;
  --blue: #123f73;
  --green: #203d31;
  --steel: #d9dfdf;
  --charcoal: #171513;
  --line: rgba(16, 16, 14, 0.18);
  --font-impact: "Anton", Impact, sans-serif;
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Manrope", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(90deg, rgba(16, 16, 14, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(16, 16, 14, 0.04) 1px, transparent 1px);
  background-size: 4rem 4rem;
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 4px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: grid;
  width: 100%;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 2rem);
  color: var(--bone);
  mix-blend-mode: difference;
}

.brand-mark {
  display: grid;
  width: 3.3rem;
  height: 3.3rem;
  place-items: center;
  border: 2px solid currentColor;
  font-family: var(--font-impact);
  font-size: 1.2rem;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.brand-mark:hover {
  background: currentColor;
  color: var(--ink);
  transform: rotate(-2deg) scale(1.04);
}

.nav-links {
  display: flex;
  gap: clamp(1rem, 4vw, 3.5rem);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.business-link {
  justify-self: end;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.nav-links a,
.business-link {
  position: relative;
}

.nav-links a::after,
.business-link::after {
  position: absolute;
  right: 0;
  bottom: -0.35rem;
  left: 0;
  height: 2px;
  content: "";
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.nav-links a:hover::after,
.business-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.hero {
  position: relative;
  display: grid;
  min-height: 94svh;
  overflow: hidden;
  align-items: end;
  padding: clamp(6.5rem, 12vw, 10rem) clamp(1rem, 4.5vw, 4.5rem) clamp(2rem, 5vw, 4rem);
  color: var(--bone);
}

.hero-image,
.hero-portrait,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-image {
  background:
    radial-gradient(circle at 72% 44%, rgba(201, 255, 54, 0.18), transparent 34%),
    linear-gradient(135deg, #07100c 0%, #182b23 42%, #07100c 100%);
  background-position: center;
  background-size: cover;
}

.hero-portrait {
  right: 0;
  left: auto;
  width: min(58rem, 62vw);
  min-height: 100%;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(201, 255, 54, 0.18) 0,
      rgba(201, 255, 54, 0.18) 1px,
      transparent 1px,
      transparent 8px
    ),
    url("assets/matthijs-portrait.png");
  background-position: right center;
  background-size: cover;
  filter: grayscale(1) invert(1) contrast(1.2) brightness(0.98);
  mix-blend-mode: screen;
  opacity: 0.26;
  transform: scale(1.04);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.55) 28%, #000 66%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.55) 28%, #000 66%, transparent 100%);
}

.hero-portrait::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, transparent 0%, rgba(201, 255, 54, 0.14) 52%, transparent 100%),
    repeating-linear-gradient(90deg, transparent 0, transparent 18px, rgba(255, 249, 238, 0.08) 19px);
  mix-blend-mode: screen;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(8, 9, 8, 0.96), rgba(8, 9, 8, 0.72) 45%, rgba(8, 9, 8, 0.35) 100%),
    linear-gradient(0deg, rgba(8, 9, 8, 0.84), transparent 52%);
}

.track-line {
  position: absolute;
  top: clamp(5rem, 10vw, 8rem);
  right: clamp(1rem, 4vw, 4rem);
  z-index: 2;
  display: grid;
  gap: 0.35rem;
  justify-items: end;
  color: var(--lime);
  font-family: var(--font-impact);
  font-size: clamp(1.6rem, 4vw, 4.5rem);
  line-height: 0.9;
  text-align: right;
  text-transform: uppercase;
}

.hero-content {
  position: relative;
  z-index: 3;
  width: min(78rem, 100%);
}

.micro-label,
.section-index {
  margin: 0 0 1rem;
  color: var(--lime);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p,
blockquote {
  margin-top: 0;
}

h1 {
  max-width: 80rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-impact);
  font-size: clamp(4.2rem, 14vw, 13.5rem);
  font-weight: 400;
  line-height: 0.82;
  text-transform: uppercase;
}

h1 span {
  display: block;
  color: var(--lime);
}

h2 {
  margin-bottom: 1.25rem;
  font-family: var(--font-impact);
  font-size: clamp(3rem, 8vw, 8.4rem);
  font-weight: 400;
  line-height: 0.88;
  text-transform: uppercase;
}

h3 {
  margin-bottom: 1rem;
  font-family: var(--font-impact);
  font-size: clamp(2rem, 4vw, 4rem);
  font-weight: 400;
  line-height: 0.92;
  text-transform: uppercase;
}

.hero-subtitle {
  max-width: 49rem;
  margin-bottom: 2rem;
  color: rgba(255, 249, 238, 0.86);
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
  font-weight: 650;
}

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

.button {
  display: inline-flex;
  min-height: 3.4rem;
  align-items: center;
  justify-content: center;
  border: 2px solid transparent;
  padding: 0.95rem 1.2rem;
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

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

.button-primary {
  background: var(--lime);
  color: var(--ink);
}

.button-primary:hover {
  background: var(--bone);
}

.button-ghost {
  border-color: rgba(255, 249, 238, 0.55);
  color: var(--bone);
}

.button-ghost:hover {
  border-color: var(--bone);
  background: rgba(255, 249, 238, 0.1);
}

.next-panel {
  position: absolute;
  right: clamp(1rem, 4vw, 4rem);
  bottom: clamp(1rem, 4vw, 3rem);
  z-index: 4;
  width: min(24rem, calc(100% - 2rem));
  border-top: 2px solid var(--lime);
  padding-top: 0.85rem;
}

.next-panel p {
  margin-bottom: 0.25rem;
  color: var(--lime);
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.next-panel a {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.4vw, 2.3rem);
  line-height: 0.98;
  transition: color 180ms ease;
}

.next-panel:hover a {
  color: var(--lime);
}

.section-pad {
  padding: clamp(4.5rem, 9vw, 8rem) clamp(1rem, 4.5vw, 4.5rem);
}

.problems,
.expertise,
.skills,
.contact {
  display: grid;
  grid-template-columns: minmax(11rem, 0.35fr) minmax(0, 1fr);
  gap: clamp(2rem, 7vw, 6rem);
}

.intro {
  display: grid;
  grid-template-columns: minmax(9rem, 0.18fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  background: var(--lime);
}

.intro .section-index,
.intro .micro-label {
  color: var(--ink);
}

.intro-copy,
.problem-content,
.expertise-head,
.skills-copy {
  max-width: 82rem;
}

.intro-copy h2 {
  max-width: 13ch;
  font-size: clamp(4.25rem, 7.2vw, 8.5rem);
}

.intro-copy p,
.expertise-head p,
.contact-copy p {
  max-width: 48rem;
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  font-weight: 700;
}

.problems {
  background: var(--charcoal);
  color: var(--bone);
}

.problem-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid rgba(255, 249, 238, 0.35);
  border-left: 2px solid rgba(255, 249, 238, 0.35);
}

.problem-list li {
  min-height: 10rem;
  border-right: 2px solid rgba(255, 249, 238, 0.35);
  border-bottom: 2px solid rgba(255, 249, 238, 0.35);
  padding: 1.25rem;
  color: rgba(255, 249, 238, 0.84);
  font-size: 1.05rem;
  font-weight: 800;
}

.expertise {
  background: var(--paper);
}

.expertise .section-index,
.skills .section-index {
  color: var(--oxide);
}

.expertise-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.expertise-card {
  grid-column: span 2;
  display: flex;
  min-height: 25rem;
  flex-direction: column;
  justify-content: flex-end;
  border-right: 2px solid var(--ink);
  padding: clamp(1.15rem, 2vw, 1.75rem);
  transition:
    background-color 220ms ease,
    color 220ms ease;
}

.expertise-card:nth-child(3),
.expertise-card:last-child {
  border-right: 0;
}

.expertise-card:nth-child(4) {
  grid-column: 2 / span 2;
  border-left: 2px solid var(--ink);
}

.expertise-card:nth-child(4),
.expertise-card:nth-child(5) {
  border-top: 2px solid var(--ink);
}

.expertise-card h3 {
  max-width: 12ch;
  overflow-wrap: anywhere;
  font-size: clamp(2.7rem, 5.4vw, 6.4rem);
  transition: color 220ms ease;
}

.expertise-card span,
.assignment span {
  display: inline-grid;
  min-width: 3.25rem;
  min-height: 3.25rem;
  place-items: center;
  margin-bottom: auto;
  background: var(--oxide);
  color: var(--bone);
  font-family: var(--font-impact);
  font-size: 0.95rem;
  text-transform: uppercase;
}

.expertise-card p,
.assignment p,
.skill-column p {
  color: rgba(16, 16, 14, 0.72);
  font-weight: 700;
  transition: color 220ms ease;
}

.expertise-card:hover {
  background: var(--ink);
  color: var(--bone);
}

.expertise-card:hover h3,
.expertise-card:hover p {
  color: var(--bone);
}

.expertise-card:hover span {
  background: var(--lime);
  color: var(--ink);
}

.assignment-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  background: var(--steel);
}

.assignment {
  display: flex;
  min-height: 24rem;
  flex-direction: column;
  justify-content: flex-end;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  padding: clamp(1.25rem, 3vw, 2rem);
  transition:
    background-color 220ms ease,
    color 220ms ease;
}

.assignment:nth-child(2n) {
  border-right: 0;
}

.assignment:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.assignment span {
  width: auto;
  align-self: flex-start;
  margin-bottom: auto;
  padding: 0 0.8rem;
  background: var(--blue);
}

.assignment h3 {
  max-width: 11ch;
  overflow-wrap: anywhere;
  font-size: clamp(3.1rem, 7.2vw, 8rem);
  transition: transform 220ms ease;
}

.assignment:hover {
  background: var(--bone);
}

.assignment:hover h3 {
  transform: translateX(0.3rem);
}

.assignment:hover span {
  background: var(--oxide);
}

.method {
  display: grid;
  grid-template-columns: minmax(17rem, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(2rem, 7vw, 6rem);
  align-items: center;
  background: var(--green);
  color: var(--bone);
}

.method-visual {
  min-height: 40rem;
  background-image: url("https://images.unsplash.com/photo-1581092921461-39b9d08a9b21?auto=format&fit=crop&w=1400&q=88");
  background-position: center;
  background-size: cover;
}

.method-copy {
  max-width: 62rem;
}

.method-list {
  display: grid;
  gap: 0;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: method;
}

.method-list li {
  display: grid;
  gap: 0.5rem;
  border-top: 2px solid rgba(255, 249, 238, 0.25);
  padding: 1.15rem 0;
  counter-increment: method;
  transition:
    border-color 180ms ease,
    transform 180ms ease;
}

.method-list li:hover {
  border-color: rgba(201, 255, 54, 0.72);
  transform: translateX(0.25rem);
}

.method-step-head {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
}

.method-step-head::before {
  content: "0" counter(method);
  color: var(--lime);
  font-family: var(--font-impact);
  font-size: 2.2rem;
  line-height: 0.95;
}

.method-list strong {
  color: var(--bone);
}

.method-list span {
  max-width: 46rem;
  color: rgba(255, 249, 238, 0.76);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 2px solid var(--ink);
  background: var(--blue);
  color: var(--bone);
}

.proof-strip div {
  min-height: 15rem;
  border-right: 2px solid rgba(255, 249, 238, 0.5);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.proof-strip div:last-child {
  border-right: 0;
}

.proof-strip strong {
  display: block;
  color: var(--lime);
  font-family: var(--font-impact);
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 400;
  line-height: 0.85;
}

.proof-strip span {
  display: block;
  max-width: 18rem;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.skill-columns {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
}

.skill-column {
  min-height: 20rem;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  padding: 1.2rem;
  transition:
    background-color 200ms ease,
    transform 200ms ease;
}

.skill-column h3 {
  color: var(--oxide);
  font-size: clamp(1.8rem, 3vw, 3.1rem);
  transition: color 200ms ease;
}

.skill-column:hover {
  background: var(--ink);
  transform: translateY(-0.2rem);
}

.skill-column:hover h3,
.skill-column:hover p {
  color: var(--bone);
}

.contact {
  display: block;
  align-items: center;
  background: var(--green);
  color: var(--bone);
}

.contact-content {
  display: grid;
  grid-template-columns: minmax(22rem, 0.9fr) minmax(30rem, 1.1fr);
  gap: clamp(2.5rem, 8vw, 8rem);
  align-items: start;
}

.contact-copy {
  max-width: 44rem;
}

.contact-copy h2 {
  max-width: 9ch;
  font-size: clamp(4rem, 10vw, 9rem);
}

.contact-copy p {
  color: rgba(255, 249, 238, 0.78);
}

.contact-options {
  display: grid;
  border-top: 2px solid rgba(255, 249, 238, 0.28);
}

.contact-option {
  display: block;
  border-bottom: 2px solid rgba(255, 249, 238, 0.28);
  padding: 1.35rem 0;
  transition:
    border-color 180ms ease,
    transform 180ms ease;
}

.contact-option:hover {
  border-color: rgba(201, 255, 54, 0.75);
  transform: translateX(0.35rem);
}

.contact-option-head {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: 1.4rem;
  align-items: start;
  margin-bottom: 0.65rem;
}

.contact-option span {
  color: var(--lime);
  font-family: var(--font-impact);
  font-size: 1.8rem;
  line-height: 0.95;
}

.contact-option strong {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-impact);
  font-size: clamp(2.1rem, 4.2vw, 4.25rem);
  font-weight: 400;
  line-height: 0.95;
  text-transform: uppercase;
  transition: color 180ms ease;
}

.contact-option em {
  display: block;
  max-width: 44rem;
  color: rgba(255, 249, 238, 0.72);
  font-style: normal;
  font-weight: 700;
}

.primary-option strong {
  color: var(--lime);
}

.contact-option:hover strong {
  color: var(--lime);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 2px solid var(--ink);
  padding: 1.1rem clamp(1rem, 4.5vw, 4.5rem);
  background: var(--lime);
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
}

.site-footer a {
  text-decoration-thickness: 2px;
  text-underline-offset: 0.25rem;
}

.site-footer a:hover {
  text-decoration-line: underline;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

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

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

@media (max-width: 1180px) {
  .expertise-grid,
  .assignment-strip,
  .skill-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .expertise-card {
    grid-column: auto;
  }

  .expertise-card:nth-child(4) {
    grid-column: auto;
    border-left: 0;
  }

  .expertise-card:nth-child(3),
  .expertise-card:nth-child(4),
  .expertise-card:nth-child(5) {
    border-top: 2px solid var(--ink);
  }

  .expertise-card:nth-child(2n),
  .assignment:nth-child(2n),
  .skill-column:nth-child(2n) {
    border-right: 0;
  }

  .expertise-card:nth-child(3) {
    border-right: 2px solid var(--ink);
  }
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: auto 1fr;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: 96svh;
    padding-bottom: 10rem;
  }

  .track-line {
    top: 6rem;
    opacity: 0.82;
  }

  .intro,
  .problems,
  .expertise,
  .method,
  .skills,
  .contact {
    grid-template-columns: 1fr;
  }

  .problem-list,
  .proof-strip {
    grid-template-columns: 1fr;
  }

  .problem-list li,
  .proof-strip div {
    min-height: auto;
  }

  .proof-strip div {
    border-right: 0;
    border-bottom: 2px solid rgba(255, 249, 238, 0.5);
  }

  .proof-strip div:last-child {
    border-bottom: 0;
  }

  .method-visual {
    min-height: 24rem;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .skill-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

@media (max-width: 1240px) and (min-width: 981px) {
  .intro {
    grid-template-columns: 1fr;
  }

  .intro-copy h2 {
    font-size: clamp(4rem, 8vw, 7rem);
  }
}

@media (max-width: 680px) {
  .section-pad {
    padding: 4rem 1rem;
  }

  .business-link {
    max-width: 8rem;
    text-align: right;
  }

  .brand-mark {
    width: 2.8rem;
    height: 2.8rem;
  }

  .hero {
    min-height: auto;
    padding: 7.5rem 1rem 2.25rem;
  }

  .hero-image {
    background-position: 58% center;
  }

  .hero-portrait {
    width: 100%;
    background-position: 62% center;
    opacity: 0.2;
    -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8) 0%, transparent 72%);
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8) 0%, transparent 72%);
  }

  h1 {
    font-size: clamp(3.25rem, 18vw, 6rem);
    line-height: 0.88;
  }

  h2 {
    font-size: clamp(2.35rem, 12.5vw, 4.35rem);
    line-height: 0.94;
  }

  h3 {
    font-size: clamp(2.25rem, 12vw, 4rem);
    line-height: 0.95;
  }

  .hero-subtitle,
  .intro-copy p,
  .expertise-head p,
  .contact-copy p {
    font-size: 1rem;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .track-line {
    display: none;
  }

  .next-panel {
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    width: 100%;
    margin-top: 2.5rem;
  }

  .expertise-grid,
  .assignment-strip,
  .skill-columns {
    grid-template-columns: 1fr;
  }

  .problem-list {
    border-left: 0;
  }

  .problem-list li {
    border-right: 0;
    padding: 1rem 0;
  }

  .expertise-card,
  .assignment,
  .skill-column {
    min-height: auto;
    border-right: 0;
  }

  .expertise-card {
    border-bottom: 2px solid var(--ink);
  }

  .expertise-card:last-child {
    border-bottom: 0;
  }

  .assignment {
    border-bottom: 2px solid var(--ink);
  }

  .assignment:nth-last-child(-n + 2) {
    border-bottom: 2px solid var(--ink);
  }

  .assignment:last-child {
    border-bottom: 0;
  }

  .expertise-card,
  .expertise-card:nth-child(3),
  .expertise-card:nth-child(4),
  .expertise-card:nth-child(5) {
    border-right: 0;
  }

  .expertise-card:nth-child(4),
  .expertise-card:nth-child(5) {
    border-top: 0;
  }

  .expertise-card span,
  .assignment span {
    margin-bottom: 3rem;
  }

  .expertise-card h3 {
    max-width: 11ch;
    font-size: clamp(2.8rem, 15vw, 5rem);
  }

  .assignment h3 {
    max-width: 12ch;
    font-size: clamp(2.8rem, 14vw, 4.85rem);
  }

  .method-visual {
    min-height: 18rem;
  }

  .contact-copy h2 {
    max-width: 8ch;
    font-size: clamp(3.2rem, 17vw, 5.8rem);
  }

  .proof-strip strong {
    font-size: clamp(3.6rem, 20vw, 6rem);
  }

  .skill-columns {
    border-left: 0;
  }

  .skill-column {
    padding: 1rem 0;
  }

  .method-step-head {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .contact-option-head {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .site-footer {
    flex-direction: column;
  }
}