.checklist-page {
  background: var(--accent-light);
}

.checklist-header {
  border-color: rgba(23, 23, 23, 0.26);
}

.back-link {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.checklist-intro {
  min-height: 610px;
  padding: 65px clamp(22px, 4vw, 64px) 70px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  align-items: end;
}

.page-kicker,
.list-heading > p,
.send-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-kicker::before {
  content: "✓";
  margin-right: 9px;
}

.checklist-intro h1 {
  margin: 65px 0 0;
  font-family: var(--ko-serif);
  font-size: clamp(86px, 12vw, 180px);
  font-weight: 400;
  line-height: 0.72;
  letter-spacing: -0.055em;
}

.checklist-intro h1 em {
  margin-left: 8vw;
  font-weight: 400;
}

.progress-block {
  max-width: 330px;
  width: 100%;
  justify-self: end;
  padding-bottom: 5px;
}

.progress-count {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
}

.progress-count strong {
  font-family: var(--serif);
  font-size: 50px;
  font-weight: 400;
  line-height: 1;
}

.progress-track {
  height: 2px;
  overflow: hidden;
  background: rgba(23, 23, 23, 0.25);
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--ink);
  transition: width 300ms ease;
}

.checklist-panel {
  padding: 105px clamp(22px, 4vw, 64px) 130px;
  background: var(--paper);
}

.list-heading {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  align-items: end;
  margin-bottom: 60px;
}

.list-heading h2 {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(48px, 6vw, 84px);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: -0.04em;
}

.clear-button {
  padding: 5px 0;
  background: transparent;
  border: 0;
  border-bottom: 1px solid currentColor;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  cursor: pointer;
}

.checklist-form fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.check-item {
  position: relative;
  min-height: 112px;
  display: grid;
  grid-template-columns: 54px 1fr 4fr;
  align-items: center;
  border-top: 1px solid var(--line);
  cursor: pointer;
}

.check-item:last-child {
  border-bottom: 1px solid var(--line);
}

.check-item input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.custom-check {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  transition: background 180ms ease, transform 180ms ease;
}

.custom-check::after {
  content: "✓";
  opacity: 0;
  font-size: 15px;
  transform: scale(0.5);
  transition: opacity 180ms ease, transform 180ms ease;
}

.check-item input:focus-visible + .custom-check {
  outline: 3px solid var(--accent-dark);
  outline-offset: 4px;
}

.check-item input:checked + .custom-check {
  background: var(--ink);
  color: var(--on-dark);
  transform: rotate(-8deg);
}

.check-item input:checked + .custom-check::after {
  opacity: 1;
  transform: scale(1);
}

.item-number {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
}

.item-text {
  position: relative;
  width: fit-content;
  font-family: var(--sans);
  font-size: clamp(28px, 3.2vw, 47px);
  line-height: 1;
  letter-spacing: -0.025em;
}

.item-text::after {
  content: "";
  position: absolute;
  top: 52%;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 280ms ease;
}

.check-item input:checked ~ .item-text {
  color: var(--muted);
}

.check-item input:checked ~ .item-text::after {
  width: 100%;
}

.send-area {
  min-height: 260px;
  margin-top: 80px;
  padding: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 35px;
  background: var(--ink);
  color: var(--paper);
}

.send-note {
  max-width: 450px;
  margin: 24px 0 0;
  color: var(--dark-muted);
  font-size: 13px;
}

.send-note strong {
  color: var(--paper);
  font-weight: 500;
}

.send-button {
  width: 145px;
  height: 145px;
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 13px;
  background: var(--accent-light);
  color: var(--ink);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  transition: transform 200ms ease, background 200ms ease;
}

.send-button:hover,
.send-button:focus-visible {
  background: var(--accent-dark);
  color: var(--on-dark);
  transform: rotate(-7deg) scale(1.04);
}

.send-button:disabled {
  cursor: wait;
  opacity: 0.65;
  transform: none;
}

.send-button svg {
  width: 38px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.2;
}

.checklist-message {
  min-height: 20px;
  margin: 18px 0 0;
  color: var(--accent-dark);
  font-family: var(--mono);
  font-size: 11px;
}

.checklist-message[data-status="success"] {
  color: #3d3d3d;
}

.checklist-message[data-status="error"] {
  color: #262626;
}

.form-trap,
.mail-response {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 760px) {
  .checklist-intro {
    min-height: 590px;
    grid-template-columns: 1fr;
    gap: 70px;
  }

  .checklist-intro h1 {
    font-size: 23vw;
  }

  .checklist-intro h1 em {
    margin-left: 0;
  }

  .progress-block {
    justify-self: start;
  }

  .checklist-panel {
    padding-top: 80px;
    padding-bottom: 90px;
  }

  .list-heading {
    grid-template-columns: 1fr auto;
    gap: 26px;
  }

  .list-heading h2 {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .check-item {
    min-height: 125px;
    grid-template-columns: 47px 35px 1fr;
  }

  .item-text {
    font-size: 30px;
  }

  .send-area {
    min-height: 420px;
    margin-top: 65px;
    padding: 32px 25px;
    flex-direction: column;
    align-items: flex-start;
  }

  .send-button {
    width: 125px;
    height: 125px;
    align-self: flex-end;
  }
}