:root {
  --primary-teal-400: #4abfbd;
  --primary-teal-500: #2ab3b1;
  --primary-green-400: #c0df33;

  --neutral-teal-100: #e6eff5;
  --neutral-gray-500: #9aa7be;

  --spacing-0: 0rem;
  --spacing-100: 0.5rem;
  --spacing-200: 1rem;
  --spacing-300: 1.5rem;
  --spacing-500: 2.5rem;

  --box-shadow: 0 0.625rem 1rem 0 rgba(0, 81, 171, 0.08);
}

.text-preset-1 {
  font-size: 2rem;
  line-height: 115%;
  letter-spacing: -0.025rem;
}

.text-preset-2 {
  font-size: 1.5rem;
  line-height: 115%;
  letter-spacing: -0.015625rem;
}

.text-preset-3 {
  font-size: 1.125rem;
  line-height: 115%;
  letter-spacing: -0.015625rem;
}

.text-preset-4-bold {
  font-size: 1rem;
  line-height: 145%;
  letter-spacing: -0.015625rem;
  font-weight: 700;
}

.text-preset-4-regular {
  font-size: 1rem;
  line-height: 165%;
  letter-spacing: -0.03125rem;
}

.text-preset-5 {
  font-size: 0.875rem;
  line-height: 145%;
  letter-spacing: 0;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Karla", sans-serif;
  font-optical-sizing: auto;
  font-style: normal;

  min-height: 100dvh;
  padding-block: clamp(1.5rem, 6vh, 6.25rem);
  font-size: 1rem;
  background-color: var(--neutral-teal-100);

  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;

  gap: var(--spacing-500);
}

main {
  display: flex;
  max-width: 39.6875rem;
  width: 100%;
  flex-direction: column;
  flex-shrink: 0;
}

header,
header div {
  display: flex;
  flex-direction: column;
}

header {
  background-color: white;
  gap: var(--spacing-300);
  padding: var(--spacing-500);

  border-radius: var(--spacing-100) var(--spacing-100) 0 0;
  box-shadow: var(--box-shadow);
}

header div {
  gap: var(--spacing-100);
}

header h2 {
  color: var(--primary-teal-500);
}

header div p.text-preset-3 {
  color: var(--primary-green-400);
}

header div p.text-preset-4-regular {
  color: var(--neutral-gray-500);
}

section {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

section div.subscription,
section .why-us {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: var(--spacing-100);

  color: white;

  min-height: clamp(13.75rem, 30vh, 20rem);
}

section div.subscription {
  border-radius: 0 0 0 var(--spacing-100);
  background-color: var(--primary-teal-500);
  box-shadow: var(--box-shadow);
}

section .why-us {
  border-radius: 0 0 var(--spacing-100) 0;
  background-color: var(--primary-teal-400);
  box-shadow: var(--box-shadow);
}

.subscription-details-container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 11.0625rem;
}

.subscription-info-container {
  display: flex;
  flex-direction: column;
}

.subscription-title-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-200);
}

.subscription-price-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-100);
}

.subscription-price-container span {
  opacity: 0.5;
}

.subscription button {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-100);
  border-radius: 0.3125rem;
  background-color: var(--primary-green-400);
  box-shadow: 0 0.625rem 0.625rem 0 rgba(0, 0, 0, 0.1);
  color: white;
  border: none;
  cursor: pointer;
  will-change: transform;
  transition: transform 0.3s ease;
}

.subscription button:hover {
  transform: translateY(-0.125rem) scale(1.03);
  box-shadow: 0 0.875rem 0.875rem 0 rgba(0, 0, 0, 0.18); /* optional stronger state */
}

.subscription button:focus-visible {
  outline: 0.1875rem solid #fff;
  outline-offset: 0.125rem;
  box-shadow: 0 0 0 0.25rem rgba(255, 255, 255, 0.45);
}

.why-us-details-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-200);
}

.why-us-details-container ul {
  list-style-type: none;
}

.why-us-details-container li {
  opacity: 0.75;
}

.attribution {
  font-size: 0.6875rem;
  text-align: center;
}

.attribution a {
  color: hsl(228, 45%, 44%);
}

.attribution a:focus-visible {
  outline: 0.1875rem solid var(--primary-teal-500);
  outline-offset: 0.125rem;
}

@media (max-width: 650px) {
  main {
    width: 19.4375rem;
  }

  section {
    grid-template-columns: 1fr;
  }

  section div.subscription {
    border-radius: 0;
    box-shadow: var(--box-shadow);
  }

  section .why-us {
    border-radius: 0 0 var(--spacing-100) var(--spacing-100);
    box-shadow: var(--box-shadow);
  }
}