/* Section 02: Gradebird's classroom-built origin story. */
.gb-story {
  position: relative;
  isolation: isolate;
  padding: clamp(6rem, 8vw, 9rem) max(2rem, calc((100vw - 1360px) / 2)) clamp(6.5rem, 8vw, 8.5rem);
  overflow: hidden;
  border-bottom: 1px solid #d8e0e8;
  background:
    radial-gradient(circle at 9% 14%, rgb(var(--page-blue-rgb) / 0.09), transparent 25rem),
    radial-gradient(circle at 86% 74%, rgb(var(--page-blue-rgb) / 0.06), transparent 23rem),
    #ffffff;
  color: #1a2c40;
}

.gb-story::before {
  content: none;
}

.gb-story .gb-section-index {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--page-blue);
}

.gb-story-feature {
  position: relative;
  z-index: 2;
  margin-top: clamp(2rem, 3.5vw, 3.25rem);
  display: grid;
  grid-template-columns: minmax(0, 1.13fr) minmax(22rem, 0.87fr);
  gap: clamp(3rem, 5vw, 5.5rem);
  align-items: center;
}

.gb-story-portrait {
  position: relative;
  min-height: clamp(27rem, 40vw, 37rem);
  margin: 0;
  overflow: hidden;
  border: 1px solid rgb(24 40 59 / 0.24);
  border-radius: 1.25rem 5.5rem 1.25rem 3.25rem;
  background: #cbd5dd;
  box-shadow: 0 26px 55px rgb(24 40 59 / 0.15);
  transform: rotate(-0.28deg);
}

.gb-story-portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(0deg, rgb(12 29 47 / 0.68), transparent 43%),
    linear-gradient(90deg, rgb(12 29 47 / 0.15), transparent 38%);
  pointer-events: none;
}

.gb-story-portrait > img {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  display: block;
  object-fit: cover;
  object-position: 50% 43%;
  filter: saturate(0.78) contrast(0.98);
  transform: scale(1.012);
}

.gb-story-portrait figcaption {
  position: absolute;
  z-index: 2;
  right: clamp(1.5rem, 3vw, 2.8rem);
  bottom: clamp(1.5rem, 3vw, 2.7rem);
  left: clamp(1.5rem, 3vw, 2.8rem);
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  color: #ffffff;
}

.gb-story-portrait figcaption span {
  font-size: clamp(2rem, 3vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
}

.gb-story-portrait figcaption p {
  margin: 0;
  color: rgb(255 255 255 / 0.82);
  font-size: 0.72rem;
  font-weight: 550;
  line-height: 1.55;
  text-align: right;
}

.gb-story-year {
  position: absolute;
  z-index: 3;
  top: clamp(1.4rem, 2.4vw, 2.3rem);
  right: clamp(1.2rem, 2vw, 2rem);
  padding: 0.75rem 1rem;
  border: 1px solid rgb(255 255 255 / 0.5);
  border-radius: 0.55rem;
  background: rgb(255 255 255 / 0.9);
  box-shadow: 0 10px 24px rgb(18 36 54 / 0.14);
  color: #23425c;
  font-size: 0.8rem;
  font-weight: 650;
  line-height: 1.25;
  text-transform: uppercase;
}

.gb-story-year span {
  display: block;
  color: var(--page-blue);
  font-size: 0.56rem;
  letter-spacing: 0.12em;
}

.gb-story-origin {
  padding-block: 1rem;
}

.gb-story-origin h2 {
  max-width: 15ch;
  margin: 0;
  color: #21364a;
  font-size: clamp(2.55rem, 4.15vw, 4.5rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1;
}

.gb-story-origin > p:not(.gb-story-kicker) {
  max-width: 35rem;
  margin: 1.45rem 0 0;
  color: #586c7e;
  font-size: 0.92rem;
  line-height: 1.72;
}

.gb-story-origin-footer {
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid #d4dee6;
}

.gb-story-origin-footer img {
  width: min(65%, 32rem);
  height: auto;
}

.gb-story-timeline {
  position: relative;
  z-index: 2;
  margin: clamp(4.5rem, 6vw, 6rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid #9eb0bf;
  list-style: none;
}

.gb-story-timeline li {
  position: relative;
  min-width: 0;
  padding: 2rem clamp(1rem, 2vw, 1.8rem) 0 0;
}

.gb-story-timeline li + li {
  padding-left: clamp(1rem, 2vw, 1.8rem);
  border-left: 1px solid #d1dbe3;
}

.gb-story-timeline li::before {
  content: "";
  position: absolute;
  top: -0.34rem;
  left: 0;
  width: 0.65rem;
  height: 0.65rem;
  border: 2px solid #ffffff;
  border-radius: 50%;
  background: var(--page-blue);
  box-shadow: 0 0 0 1px rgb(var(--page-blue-rgb) / 0.28);
}

.gb-story-timeline li + li::before {
  left: clamp(1rem, 2vw, 1.8rem);
}

.gb-story-timeline span,
.gb-story-timeline strong {
  display: block;
}

.gb-story-timeline span {
  color: var(--page-blue);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.gb-story-timeline strong {
  margin-top: 0.65rem;
  color: #2a4054;
  font-size: 0.9rem;
  font-weight: 650;
  line-height: 1.25;
}

.gb-story-timeline p {
  margin: 0.55rem 0 0;
  color: #718293;
  font-size: 0.72rem;
  line-height: 1.55;
}

@media (max-width: 1000px) {
  .gb-story-feature {
    grid-template-columns: minmax(0, 1.05fr) minmax(19rem, 0.95fr);
    gap: 2.5rem;
  }

  .gb-story-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    row-gap: 2.5rem;
  }

  .gb-story-timeline li:nth-child(4) {
    border-left: 0;
  }
}

@media (max-width: 900px) {
  .gb-story {
    padding-inline: 2rem;
  }

  .gb-story-feature {
    grid-template-columns: 1fr;
  }

  .gb-story-portrait {
    min-height: clamp(25rem, 62vw, 34rem);
  }

  .gb-story-origin {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    column-gap: 2.5rem;
  }

  .gb-story-origin-footer {
    grid-column: 1 / -1;
  }

  .gb-story-origin > p:not(.gb-story-kicker) {
    margin-top: 0;
  }
}

@media (max-width: 640px) {
  .gb-story {
    padding: 4.8rem 1.1rem 5rem;
  }

  .gb-story-feature {
    margin-top: 2rem;
  }

  .gb-story-portrait {
    width: calc(100% + 1.2rem);
    min-height: 22rem;
    margin-left: -0.6rem;
    border-radius: 0.8rem 2.6rem 0.8rem 1.6rem;
  }

  .gb-story-portrait figcaption {
    align-items: start;
    flex-direction: column;
    gap: 0.5rem;
  }

  .gb-story-portrait figcaption p {
    text-align: left;
  }

  .gb-story-year {
    top: 1rem;
    right: 1rem;
  }

  .gb-story-origin {
    display: block;
  }

  .gb-story-origin h2 {
    font-size: clamp(2.35rem, 10.5vw, 3.3rem);
  }

  .gb-story-origin > p:not(.gb-story-kicker) {
    margin-top: 1.25rem;
  }

  .gb-story-timeline {
    margin-top: 4rem;
    grid-template-columns: 1fr;
    border-top: 0;
    border-left: 1px solid #9eb0bf;
  }

  .gb-story-timeline li,
  .gb-story-timeline li + li {
    padding: 0 0 2rem 1.5rem;
    border-left: 0;
  }

  .gb-story-timeline li:last-child {
    padding-bottom: 0;
  }

  .gb-story-timeline li::before,
  .gb-story-timeline li + li::before {
    top: 0.15rem;
    left: -0.35rem;
  }
}