.page-about {
  --about-flare: #FF6A00;
  --about-ink-soft: rgba(10, 14, 23, 0.78);
}

.page-about__hero {
  position: relative;
  overflow: hidden;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(255, 77, 141, 0.28), transparent 65%);
  pointer-events: none;
}

.page-about__hero-window {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  padding: clamp(96px, 18vh, 168px) 22px 48px;
  border: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, rgba(123, 47, 255, 0.22), rgba(11, 29, 58, 0.55)),
    repeating-linear-gradient(90deg, rgba(141, 215, 255, 0.05) 0 1px, transparent 1px 64px),
    var(--color-void);
  box-shadow: inset 0 0 90px rgba(11, 29, 58, 0.65), var(--shadow-deep);
}

.page-about__breadcrumb {
  margin-bottom: 10px;
}

.page-about__eyebrow {
  color: var(--color-frost);
}

.page-about__display-title {
  max-width: 14em;
  font-size: clamp(42px, 9vw, 96px);
  line-height: 1.04;
  letter-spacing: 0.01em;
  margin: 0;
}

.page-about__lede {
  max-width: 32em;
  margin: 0;
  font-size: clamp(16px, 2.6vw, 22px);
  line-height: 1.75;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}

.page-about__toc {
  position: relative;
  z-index: 2;
  margin: 0 22px 28px;
  padding: 20px 22px;
  border-left: 4px solid var(--about-flare);
  background: var(--color-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
}

.page-about__toc-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-frost);
  margin-bottom: 14px;
}

.page-about__toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about__toc-list li {
  margin: 0;
}

.page-about__toc-list a {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.25s var(--ease-out), transform 0.25s var(--ease-out), padding-left 0.25s var(--ease-out);
}

.page-about__toc-list a:hover {
  color: var(--about-flare);
  padding-left: 6px;
}

.page-about__origin {
  position: relative;
  padding-top: 76px;
  padding-bottom: 76px;
}

.page-about__origin::before {
  content: "01";
  position: absolute;
  top: 40px;
  right: 24px;
  font-family: var(--font-mono);
  font-size: clamp(64px, 14vw, 150px);
  font-weight: 800;
  line-height: 1;
  color: rgba(141, 215, 255, 0.08);
  pointer-events: none;
}

.page-about__origin-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about__origin-copy {
  position: relative;
  z-index: 1;
}

.page-about__section-title {
  font-size: clamp(28px, 5.4vw, 48px);
  font-weight: 900;
  line-height: 1.18;
  margin: 14px 0 24px;
  letter-spacing: 0.01em;
}

.page-about__origin-text {
  margin-bottom: 28px;
}

.page-about__origin-text p {
  margin: 0 0 16px;
}

.page-about__origin-text p:last-child {
  margin-bottom: 0;
}

.page-about__origin-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .stamp {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-frost);
  border: 1px solid rgba(141, 215, 255, 0.4);
  padding: 8px 14px;
  transition: transform 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.page-about .stamp:hover {
  transform: scale(1.08);
  color: var(--about-flare);
  border-color: var(--about-flare);
}

.page-about__origin-figure {
  position: relative;
  z-index: 1;
}

.page-about .asset-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: auto;
  object-fit: cover;
}

.page-about__milestones {
  position: relative;
  padding-top: 84px;
  padding-bottom: 96px;
}

.page-about__milestones-head {
  max-width: 760px;
  margin-bottom: 44px;
}

.page-about__section-title--dark {
  color: var(--color-ink);
  margin-bottom: 14px;
}

.page-about__milestones-lede {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.6;
  color: var(--about-ink-soft);
}

.page-about__milestones-banner {
  margin-bottom: 64px;
}

.page-about__timeline {
  position: relative;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 4px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-flare) 0%, var(--color-pulse) 55%, rgba(123, 47, 255, 0) 100%);
}

.page-about__milestone {
  position: relative;
  padding-left: 52px;
  margin-bottom: 40px;
}

.page-about__milestone:last-child {
  margin-bottom: 0;
}

.page-about__milestone::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 30px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--about-flare);
  box-shadow: 0 0 0 5px rgba(255, 106, 0, 0.14);
}

.page-about__milestone-year {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-pulse);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}

.page-about__milestone-card {
  padding: 20px 22px;
}

.page-about__milestone-card h3 {
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--color-ink);
  margin: 0 0 8px;
}

.page-about__milestone-card p {
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.74;
  color: var(--about-ink-soft);
  margin: 0;
}

.page-about__milestone-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-flare);
  border: 1px solid rgba(255, 106, 0, 0.45);
  padding: 4px 10px;
  margin-bottom: 12px;
}

.page-about__opensource {
  position: relative;
  padding-top: 80px;
  padding-bottom: 90px;
}

.page-about__opensource-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about__opensource-text p {
  margin: 0 0 16px;
}

.page-about__opensource-text p:last-child {
  margin-bottom: 0;
}

.page-about__opensource-notes {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.page-about__opensource-notes li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(141, 215, 255, 0.16);
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--text-main);
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.page-about__opensource-notes li:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 106, 0, 0.5);
}

.page-about__opensource-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
  color: var(--about-flare);
}

.page-about__vision {
  position: relative;
  background:
    linear-gradient(rgba(141, 215, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141, 215, 255, 0.07) 1px, transparent 1px),
    radial-gradient(ellipse at 82% 18%, rgba(123, 47, 255, 0.32), transparent 55%),
    radial-gradient(ellipse at 12% 88%, rgba(255, 77, 141, 0.16), transparent 48%),
    var(--color-void);
  background-size: 56px 56px, 56px 56px, 100% 100%, 100% 100%, 100% 100%;
}

.page-about__vision-inner {
  max-width: 900px;
  padding: 88px 0 100px;
}

.page-about__vision-title {
  margin: 14px 0 24px;
  font-size: clamp(32px, 6vw, 58px);
}

.page-about__vision-text {
  max-width: 720px;
  margin-bottom: 34px;
}

.page-about__vision-text p {
  margin: 0 0 16px;
}

.page-about__vision-text p:last-child {
  margin-bottom: 0;
}

.page-about__vision-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (min-width: 768px) {
  .page-about__hero-window {
    padding: 130px 48px 64px;
  }

  .page-about__toc {
    margin-left: 48px;
    margin-right: 48px;
    max-width: 360px;
  }

  .page-about__origin {
    padding-top: 96px;
    padding-bottom: 96px;
  }

  .page-about__origin-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 56px;
  }

  .page-about__opensource-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 56px;
  }

  .page-about__opensource-notes {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__opensource-notes li {
    padding: 18px 16px;
  }

  .page-about__opensource-num {
    font-size: 30px;
  }

  .page-about__vision-inner {
    padding: 100px 0 120px;
  }
}

@media (min-width: 1080px) {
  .page-about__hero {
    display: flex;
    align-items: stretch;
    gap: clamp(16px, 3vw, 48px);
    padding: 0 clamp(20px, 3.5vw, 56px) 48px;
  }

  .page-about__hero-window {
    flex: 1 1 auto;
    min-width: 0;
    padding: 140px 56px 72px;
  }

  .page-about__toc {
    flex: 0 0 clamp(240px, 22vw, 320px);
    min-width: 0;
    align-self: flex-end;
    margin: 0 0 24px;
  }

  .page-about__timeline {
    padding-top: 12px;
  }

  .page-about__timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about__milestone {
    width: 50%;
    padding-left: 0;
    padding-right: 56px;
    margin-bottom: 56px;
  }

  .page-about__milestone::before {
    left: auto;
    right: -8px;
    top: 36px;
  }

  .page-about__milestone:nth-child(even) {
    margin-left: 50%;
    padding-left: 56px;
    padding-right: 0;
  }

  .page-about__milestone:nth-child(even)::before {
    left: -8px;
    right: auto;
  }

  .page-about__milestone:nth-child(odd) {
    text-align: right;
  }

  .page-about__milestone:nth-child(even) {
    text-align: left;
  }

  .page-about__milestone-year {
    font-size: 36px;
    margin-bottom: 12px;
  }
}