/* About-only extension. The existing profile, navigation and Hero stay untouched. */
.about-expertise {
  --expertise-accent: #00e5f0;
  margin-top: clamp(80px, 8vw, 136px);
  scroll-margin-top: 100px;
}

.about-expertise .expertise-header {
  margin-bottom: clamp(32px, 3.2vw, 52px);
}

.about-expertise .expertise-eyebrow,
.about-expertise .expertise-category {
  color: var(--expertise-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.6;
}

.about-expertise .expertise-header h3 {
  margin: 24px 0 20px;
  color: var(--text);
  font-size: clamp(28px, 3.1vw, 48px);
  font-weight: 650;
  letter-spacing: -0.045em;
  line-height: 1.35;
}

.about-expertise .expertise-header h3 span {
  display: block;
}

.about-expertise .expertise-intro {
  max-width: 44em;
  color: var(--muted);
  font-size: clamp(13px, 1vw, 15px);
  line-height: 1.9;
}

.about-expertise .expertise-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: clamp(16px, 1.4vw, 24px);
}

.about-expertise .expertise-card {
  display: flex;
  min-width: 0;
  padding: clamp(24px, 2vw, 34px);
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  transition: transform 350ms ease, border-color 350ms ease, background-color 350ms ease;
}

.about-expertise .expertise-number {
  display: block;
  margin: -4px 0 30px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: clamp(80px, 7.4vw, 116px);
  font-weight: 650;
  letter-spacing: -0.08em;
  line-height: 1;
  opacity: 0.12;
  transition: opacity 350ms ease;
}

.about-expertise .expertise-card h4 {
  margin: 14px 0 22px;
  color: var(--text);
  font-size: clamp(21px, 1.65vw, 27px);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.4;
  word-break: keep-all;
  overflow-wrap: normal;
}

.about-expertise .expertise-keywords {
  display: flex;
  min-height: 72px;
  margin: 0 0 24px;
  padding: 0;
  align-content: start;
  flex-wrap: wrap;
  gap: 4px 10px;
  color: #a7b2c0;
  list-style: none;
  font-size: 12px;
  line-height: 1.8;
}

.about-expertise .expertise-keywords li {
  max-width: 100%;
}

.about-expertise .expertise-keywords li:not(:last-child)::after {
  margin-left: 10px;
  color: var(--muted);
  content: "·";
}

.about-expertise .expertise-description {
  margin-top: auto;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.about-expertise .expertise-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 24px 0 0;
  padding: 24px 0;
  color: #a7b2c0;
  border-block: 1px solid var(--line);
  list-style: none;
  font-family: var(--font-mono);
  font-size: clamp(9px, 0.72vw, 11px);
  letter-spacing: 0.06em;
  line-height: 1.8;
}

.about-expertise .expertise-strip li {
  display: flex;
  min-width: 0;
  padding: 0 16px;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.about-expertise .expertise-strip li + li {
  border-left: 1px solid var(--line);
}

.about-expertise .expertise-strip strong {
  color: var(--expertise-accent);
  font-weight: 500;
}

@media (min-width: 701px) and (hover: hover) and (pointer: fine) {
  .about-expertise .expertise-card:hover {
    transform: translateY(-6px);
    border-color: var(--expertise-accent);
    background: var(--panel-soft);
  }

  .about-expertise .expertise-card:hover .expertise-number {
    opacity: 0.22;
  }
}

@media (max-width: 1199px) {
  .about-expertise .expertise-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-expertise .expertise-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 20px;
    font-size: 10px;
  }

  .about-expertise .expertise-strip li:nth-child(3) {
    border-left: 0;
  }
}

@media (max-width: 700px) {
  .about-expertise .expertise-header h3 {
    font-size: clamp(20px, 5.2vw, 32px);
    letter-spacing: -0.04em;
  }

  .about-expertise .expertise-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-expertise .expertise-card {
    padding: 28px 24px;
    border-radius: 24px;
    transition: none;
  }

  .about-expertise .expertise-card h4 {
    font-size: 24px;
  }

  .about-expertise .expertise-number {
    font-size: 88px;
    transition: none;
  }

  .about-expertise .expertise-strip {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
    padding: 8px 0;
  }

  .about-expertise .expertise-strip li {
    padding: 16px 0;
    justify-content: flex-start;
    text-align: left;
  }

  .about-expertise .expertise-strip li + li {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-expertise .expertise-card,
  .about-expertise .expertise-number {
    transition: none;
  }

  .about-expertise .expertise-card:hover {
    transform: none;
  }
}