@font-face {
  font-family: "Ubuntu";
  src: url("./assets/fonts/Ubuntu-Regular.ttf") format("truetype");
  font-weight: 400;
}

@font-face {
  font-family: "Ubuntu";
  src: url("./assets/fonts/Ubuntu-Medium.ttf") format("truetype");
  font-weight: 500;
}

@font-face {
  font-family: "Ubuntu";
  src: url("./assets/fonts/Ubuntu-Bold.ttf") format("truetype");
  font-weight: 700;
}

:root {
  --blue-950: hsl(213, 96%, 18%);
  --purple-600: hsl(243, 100%, 62%);
  --blue-300: hsl(228, 100%, 84%);
  --blue-200: hsl(206, 94%, 87%);
  --red-500: hsl(354, 84%, 57%);
  --grey-500: hsl(231, 11%, 63%);
  --purple-200: hsl(229, 24%, 87%);
  --blue-100: hsl(218, 100%, 97%);
  --blue-50: hsl(231, 100%, 99%);
  --white: hsl(0, 100%, 100%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Ubuntu", sans-serif;
  font-size: 16px;
  background: var(--blue-100);
  color: var(--blue-950);
}

h1,
h2,
h3,
p {
  margin: 0;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.app {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 2rem 1rem;
}

.form-card {
  display: grid;
  grid-template-columns: 274px minmax(0, 1fr);
  gap: 1rem;
  max-width: 940px;
  width: 100%;
  margin: 0 auto;
  padding: 1rem;
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 20px 30px -20px rgba(2, 41, 90, 0.25);
}

.sidebar {
  border-radius: 10px;
  padding: 2rem 2rem 1rem;
  background-image: url("./assets/images/bg-sidebar-desktop.svg");
  background-size: cover;
  background-position: center;
}

.stepper {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.stepper li {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.step-btn {
  width: 33px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 1px solid var(--white);
  background: transparent;
  color: var(--white);
  font-weight: 700;
  display: grid;
  place-items: center;
}

.step-btn.is-active {
  border-color: var(--blue-200);
  background: var(--blue-200);
  color: var(--blue-950);
}

.step-btn:focus-visible {
  outline: 2px solid var(--blue-200);
  outline-offset: 2px;
}

.step-copy {
  text-transform: uppercase;
}

.step-label {
  display: block;
  margin-bottom: 2px;
  color: var(--blue-300);
  font-size: 0.75rem;
}

.step-title {
  display: block;
  color: var(--white);
  font-weight: 700;
  letter-spacing: 1px;
}

.content-area {
  display: flex;
}

#multiStepForm {
  width: min(100%, 450px);
  margin: 2.35rem auto 0;
  display: flex;
  flex-direction: column;
  min-height: 540px;
}

.step-panel {
  animation: fade-in 180ms ease;
}

.step-panel[hidden] {
  display: none;
}

h1,
h2 {
  font-size: 2rem;
  line-height: 1.1;
}

.subtitle {
  margin-top: 0.7rem;
  color: var(--grey-500);
  line-height: 1.55;
}

.field-group {
  margin-top: 1.45rem;
}

.field-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.45rem;
}

label {
  font-size: 0.875rem;
  font-weight: 500;
}

.field-error,
.step-error {
  color: var(--red-500);
  font-size: 0.875rem;
  font-weight: 700;
}

.step-error {
  margin-top: 1rem;
  min-height: 1.25rem;
}

input[type="text"],
input[type="email"],
input[type="tel"] {
  width: 100%;
  border: 1px solid var(--purple-200);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  color: var(--blue-950);
  font-weight: 500;
}

input::placeholder {
  color: var(--grey-500);
}

input:focus-visible {
  border-color: var(--purple-600);
  outline: none;
}

input.is-invalid {
  border-color: var(--red-500);
}

.plan-options {
  margin-top: 2.15rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.plan-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.75rem;
  min-height: 160px;
  border: 1px solid var(--purple-200);
  border-radius: 10px;
  background: var(--white);
  padding: 1rem;
  text-align: left;
}

.plan-card:hover,
.plan-card:focus-visible {
  border-color: var(--purple-600);
}

.plan-card.is-selected {
  border-color: var(--purple-600);
  background: var(--blue-50);
}

.plan-card img {
  width: 40px;
  height: 40px;
}

.plan-content {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.plan-content strong {
  font-size: 1rem;
}

.plan-price {
  color: var(--grey-500);
}

.plan-badge {
  color: var(--blue-950);
  font-size: 0.8rem;
  font-weight: 500;
}

.billing-toggle {
  margin-top: 1.9rem;
  border-radius: 8px;
  background: var(--blue-50);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.55rem;
  padding: 0.95rem;
}

.billing-label {
  color: var(--grey-500);
  font-weight: 700;
}

.billing-label.is-active {
  color: var(--blue-950);
}

#billingToggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-ui {
  width: 38px;
  height: 20px;
  border-radius: 999px;
  background: var(--blue-950);
  position: relative;
}

.toggle-ui::after {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  width: 12px;
  height: 12px;
  background: var(--white);
  border-radius: 50%;
  transition: transform 150ms ease;
}

#billingToggle:checked + .toggle-ui::after {
  transform: translateX(18px);
}

.addon-list {
  margin-top: 1.95rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.addon-card {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--purple-200);
  border-radius: 10px;
  background: var(--white);
}

.addon-card:hover {
  border-color: var(--purple-600);
}

.addon-card.is-selected {
  border-color: var(--purple-600);
  background: var(--blue-50);
}

.addon-card input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.addon-check {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid var(--purple-200);
  display: grid;
  place-items: center;
}

.addon-card.is-selected .addon-check {
  background: var(--purple-600);
  border-color: var(--purple-600);
}

.addon-check img {
  opacity: 0;
}

.addon-card.is-selected .addon-check img {
  opacity: 1;
}

.addon-copy {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.addon-copy strong {
  font-size: 1.05rem;
}

.addon-copy span {
  color: var(--grey-500);
}

.addon-price {
  color: var(--purple-600);
  font-size: 0.925rem;
}

.summary-box {
  margin-top: 2rem;
  border-radius: 10px;
  padding: 1.4rem;
  background: var(--blue-50);
}

.summary-plan {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.summary-plan h3 {
  font-size: 1.1rem;
}

.summary-plan p {
  font-size: 1.15rem;
  font-weight: 700;
}

.text-button {
  border: 0;
  padding: 0;
  margin-top: 0.3rem;
  background: transparent;
  color: var(--grey-500);
  text-decoration: underline;
}

.text-button:hover,
.text-button:focus-visible {
  color: var(--purple-600);
}

.summary-box hr {
  border: 0;
  border-top: 1px solid var(--purple-200);
  margin: 1rem 0;
}

.summary-addons {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.summary-addons li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.summary-addons span {
  color: var(--grey-500);
}

.summary-total {
  margin-top: 1.6rem;
  padding: 0 1.4rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.summary-total p:first-child {
  color: var(--grey-500);
}

#summary-total-price {
  color: var(--purple-600);
  font-size: 1.3rem;
  font-weight: 700;
}

.thanks-panel {
  min-height: 420px;
  display: grid;
  place-content: center;
  text-align: center;
}

.thanks-panel img {
  margin: 0 auto;
}

.thanks-panel h2 {
  margin-top: 1.8rem;
}

.thanks-panel p {
  margin-top: 1rem;
  color: var(--grey-500);
  line-height: 1.6;
}

.actions {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.btn {
  border: 0;
  border-radius: 8px;
  padding: 0.9rem 1.55rem;
  font-weight: 500;
}

.btn-back {
  background: transparent;
  color: var(--grey-500);
  padding-inline: 0;
}

.btn-back:hover,
.btn-back:focus-visible {
  color: var(--blue-950);
}

.btn-next {
  margin-left: auto;
  background: var(--blue-950);
  color: var(--white);
}

.btn-next:hover,
.btn-next:focus-visible {
  background: hsl(213, 96%, 30%);
}

.btn-confirm {
  margin-left: auto;
  background: var(--purple-600);
  color: var(--white);
}

.btn-confirm:hover,
.btn-confirm:focus-visible {
  background: hsl(243, 84%, 68%);
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 930px) {
  .app {
    display: block;
    padding: 0;
  }

  .form-card {
    display: block;
    margin: 0;
    max-width: none;
    min-height: 100vh;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    padding: 0;
  }

  .sidebar {
    border-radius: 0;
    background-image: url("./assets/images/bg-sidebar-mobile.svg");
    background-size: cover;
    background-position: center;
    min-height: 170px;
    padding: 2rem 1rem 1rem;
  }

  .stepper {
    flex-direction: row;
    justify-content: center;
    gap: 1rem;
  }

  .step-copy {
    display: none;
  }

  .content-area {
    margin-top: -72px;
    padding: 0 1rem;
  }

  #multiStepForm {
    width: 100%;
    margin: 0;
    min-height: calc(100vh - 98px);
  }

  .step-panel {
    background: var(--white);
    border-radius: 12px;
    padding: 1.95rem 1.45rem;
    box-shadow: 0 10px 20px -20px rgba(2, 41, 90, 0.35);
  }

  h1,
  h2 {
    font-size: 1.95rem;
  }

  .plan-options {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    margin-top: 1.85rem;
  }

  .plan-card {
    flex-direction: row;
    justify-content: flex-start;
    gap: 0.95rem;
    min-height: 78px;
    padding: 0.95rem;
    align-items: center;
  }

  .plan-content {
    gap: 0.2rem;
  }

  .plan-content strong {
    font-size: 1.05rem;
  }

  .plan-badge {
    font-size: 0.85rem;
  }

  .billing-toggle {
    margin-top: 1.35rem;
    justify-content: space-between;
    gap: 1rem;
    padding-inline: 1rem;
  }

  .summary-box {
    margin-top: 1.4rem;
  }

  .summary-total {
    margin-top: 1rem;
    padding: 0.8rem 0.35rem 0;
  }

  .actions {
    margin-top: auto;
    background: var(--white);
    border-top: 1px solid rgba(173, 190, 255, 0.22);
    margin-inline: -1rem;
    padding: 1rem;
  }

  .thanks-panel {
    min-height: 430px;
  }
}

@media (max-width: 420px) {
  h1,
  h2 {
    font-size: 1.9rem;
  }

  .addon-card {
    padding: 0.85rem;
    gap: 0.75rem;
    grid-template-columns: auto auto 1fr;
  }

  .addon-price {
    grid-column: 3;
    justify-self: end;
    margin-top: 0.35rem;
  }

  .addon-copy strong {
    font-size: 1rem;
  }

  .addon-copy span {
    font-size: 0.9rem;
  }
}