:root {
  --ssf-powder: #f7f6f2;
  --ssf-espresso: #3b3430;
  --ssf-black: #000;
  --ssf-white: #fff;
  --ssf-card-width: clamp(250px, 30vw, 350px);
  --ssf-control-size: 48px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-width: 0;
  background: transparent;
}

body {
  color: var(--ssf-black);
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
}

.ssf-timeline {
  width: 100%;
  padding: 24px 0 10px;
  overflow: hidden;
}

.ssf-timeline__frame {
  position: relative;
  width: 100%;
}

.ssf-timeline__viewport {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
}

.ssf-timeline__viewport::-webkit-scrollbar {
  display: none;
}

.ssf-timeline__viewport:focus-visible {
  outline: 2px solid var(--ssf-espresso);
  outline-offset: -2px;
}

.ssf-timeline__track {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: clamp(24px, 4vw, 52px);
  width: max-content;
  min-width: 100%;
  padding: 54px clamp(64px, 6vw, 88px) 34px;
}

.ssf-timeline__track::before {
  content: "";
  position: absolute;
  top: 76px;
  right: 0;
  left: 0;
  height: 2px;
  background: var(--ssf-espresso);
}

.ssf-timeline__entry {
  position: relative;
  display: flex;
  flex: 0 0 var(--ssf-card-width);
  padding-top: 54px;
  scroll-snap-align: center;
}

.ssf-timeline__marker {
  position: absolute;
  z-index: 1;
  top: 14px;
  left: 50%;
  width: 18px;
  height: 18px;
  border: 4px solid var(--ssf-espresso);
  border-radius: 50%;
  background: var(--ssf-white);
  transform: translateX(-50%);
}

.ssf-timeline__marker::after {
  content: "";
  position: absolute;
  top: 14px;
  left: 50%;
  width: 2px;
  height: 25px;
  background: var(--ssf-espresso);
  transform: translateX(-50%);
}

.ssf-timeline__card {
  flex: 1;
  min-height: 220px;
  padding: 25px 26px 28px;
  border: 1px solid rgba(59, 52, 48, 0.18);
  border-radius: 2px;
  background: var(--ssf-powder);
  box-shadow: 0 8px 26px rgba(59, 52, 48, 0.06);
}

.ssf-timeline__year {
  margin: 0 0 15px;
  color: var(--ssf-espresso);
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1;
}

.ssf-timeline__content {
  margin: 0;
  font-size: 1rem;
  line-height: 1.55;
}

.ssf-timeline__image {
  display: block;
  width: 100%;
  height: 180px;
  margin: -1px -1px 22px;
  border-radius: 1px;
  background: var(--ssf-powder);
  object-fit: contain;
  object-position: center;
}

.ssf-timeline__control {
  position: absolute;
  z-index: 4;
  top: 50%;
  display: grid;
  width: var(--ssf-control-size);
  height: var(--ssf-control-size);
  padding: 0;
  place-items: center;
  border: 1px solid var(--ssf-espresso);
  border-radius: 50%;
  color: var(--ssf-white);
  background: var(--ssf-espresso);
  box-shadow: 0 5px 16px rgba(59, 52, 48, 0.18);
  cursor: pointer;
  transform: translateY(-50%);
  transition: background 160ms ease, color 160ms ease, opacity 160ms ease;
}

.ssf-timeline__control--previous {
  left: 12px;
}

.ssf-timeline__control--next {
  right: 12px;
}

.ssf-timeline__control svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.ssf-timeline__control:hover:not(:disabled),
.ssf-timeline__control:focus-visible {
  color: var(--ssf-espresso);
  background: var(--ssf-powder);
}

.ssf-timeline__control:focus-visible {
  outline: 2px solid var(--ssf-espresso);
  outline-offset: 3px;
}

.ssf-timeline__control:disabled {
  opacity: 0.28;
  cursor: default;
}

.ssf-timeline__status {
  width: min(420px, calc(100vw - 120px));
  min-height: 160px;
  margin: 30px auto;
  padding: 40px 24px;
  background: var(--ssf-powder);
  text-align: center;
  line-height: 1.5;
}

@media (max-width: 640px) {
  :root {
    --ssf-card-width: min(76vw, 310px);
    --ssf-control-size: 42px;
  }

  .ssf-timeline {
    padding-top: 12px;
  }

  .ssf-timeline__track {
    gap: 20px;
    padding-right: 52px;
    padding-left: 52px;
  }

  .ssf-timeline__card {
    min-height: 238px;
    padding: 23px 22px 25px;
  }

  .ssf-timeline__control--previous {
    left: 6px;
  }

  .ssf-timeline__control--next {
    right: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ssf-timeline__control {
    transition: none;
  }
}