/* ============================================================
   ucnote01 — "not a template" closing note (/usecase01 §03)
   Palette: ink #13171e / purple #864ffe / cyan #83e7ee / lime #c6f56f
   Breakpoints: 640 / 768 / 1024 / 1280
   ============================================================ */

section.ucnote01 {
  --uc-ink: #13171e;
  --uc-purple: #864ffe;
  --uc-cyan: #83e7ee;
  --uc-lime: #c6f56f;
  --uc-body: #b9c0cc;
  padding: calc(var(--section-y) * 1.05) var(--page-pad);
  background:
    radial-gradient(44rem 26rem at 0% 100%, rgba(134, 79, 254, 0.34), transparent 64%),
    radial-gradient(38rem 22rem at 100% 0%, rgba(131, 231, 238, 0.16), transparent 66%),
    var(--uc-ink);
  color: #eef1f6;
  overflow: hidden;
}

.ucnote01 .ucnote01__inner {
  display: grid;
  gap: var(--space-5);
  max-width: var(--content-max);
  margin-inline: auto;
  min-width: 0;
}

.ucnote01 .ucnote01__head {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
}

.ucnote01 .ucnote01__kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  color: var(--uc-cyan);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1.7;
}

.ucnote01 .ucnote01__kicker::before {
  content: "";
  flex: none;
  width: 1.75rem;
  height: 2px;
  background: var(--uc-lime);
}

.ucnote01 .ucnote01__title {
  margin: 0;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1.14;
  letter-spacing: -0.025em;
}

.ucnote01 .ucnote01__lead {
  margin: 0;
  max-width: 54rem;
  color: var(--uc-body);
  font-size: 1rem;
  line-height: var(--lh-body);
}

.ucnote01 .ucnote01__cards {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.ucnote01 .ucnote01__card {
  display: grid;
  gap: 0.375rem;
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  min-width: 0;
}

.ucnote01 .ucnote01__card h3 {
  margin: 0;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.35;
}

.ucnote01 .ucnote01__card p {
  margin: 0;
  color: var(--uc-body);
  font-size: 0.875rem;
  line-height: 1.6;
}

.ucnote01 .ucnote01__ladder {
  display: grid;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  min-width: 0;
}

.ucnote01 .ucnote01__ladder-kicker {
  margin: 0;
  color: var(--uc-lime);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.7;
}

.ucnote01 .ucnote01__steps {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.ucnote01 .ucnote01__steps li {
  display: grid;
  gap: 0.25rem;
  padding: var(--space-3) var(--space-4);
  background: rgba(19, 23, 30, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  min-width: 0;
}

.ucnote01 .ucnote01__steps span {
  color: var(--uc-cyan);
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.ucnote01 .ucnote01__steps strong {
  color: #ffffff;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.45;
}

.ucnote01 .ucnote01__steps em {
  color: var(--uc-body);
  font-style: normal;
  font-size: 0.8125rem;
  line-height: 1.6;
}

.ucnote01 .ucnote01__more {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.125rem;
  border-bottom: 1px solid rgba(131, 231, 238, 0.5);
  color: var(--uc-cyan);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.7;
  text-decoration: none;
}

.ucnote01 .ucnote01__more:hover {
  color: var(--uc-lime);
  border-color: rgba(198, 245, 111, 0.6);
}

@media (min-width: 640px) {
  .ucnote01 .ucnote01__title {
    font-size: 2rem;
  }

  .ucnote01 .ucnote01__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .ucnote01 .ucnote01__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .ucnote01 .ucnote01__inner {
    gap: var(--space-6);
  }

  .ucnote01 .ucnote01__title {
    font-size: 2.25rem;
  }
}

@media (min-width: 1024px) {
  .ucnote01 .ucnote01__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .ucnote01 .ucnote01__title {
    font-size: 2.5rem;
  }
}

@media (min-width: 1280px) {
  .ucnote01 .ucnote01__title {
    font-size: 2.75rem;
  }
}