*,
*::before,
*::after {
  box-sizing: border-box;
}
body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}
html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}
ul,
ol {
  list-style: none;
  padding: 0;
}
a {
  text-decoration: none;
  color: inherit;
}
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}
input,
button,
textarea,
select {
  font: inherit;
}
button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
:focus-visible {
  outline: 2px solid #000;
  outline-offset: 2px;
}
html {
  scroll-behavior: smooth;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/Inter-Regular.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/Inter-Medium.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/Inter-SemiBold.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/Inter-Bold.woff2") format("woff2");
}
html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}
body {
  min-height: 100vh;
  font-family: "Inter", system-ui, sans-serif;
  text-rendering: optimizeSpeed;
  line-height: 1.6;
  font-weight: 300;
  color: #3f3f46;
  background-color: #f7f8fa;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.25;
  color: #111;
}
strong {
  font-weight: 700;
}
.menu-toggle {
  display: block;
  cursor: pointer;
  z-index: 100;
  background: transparent;
  border: none;
}
.menu-panel {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: clamp(200px, 50%, 400px);
  background: #fff;
  z-index: 90;
}
.menu.is-open .menu-panel {
  display: flex;
  flex-direction: column;
}
.menu.is-open .menu-panel ul {
  padding-top: 0.5rem;
}
.menu.is-open .menu-panel ul li a {
  display: block;
  padding: 0.5rem 0;
}
.menu-backdrop {
  display: none;
}
.menu.is-open .menu-backdrop {
  display: block;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 80;
}
@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
  .menu-panel {
    display: flex !important;
    position: static;
    width: auto;
    background: transparent;
    padding: 0;
  }
  .menu-panel ul {
    display: flex;
    flex-direction: row;
    margin-inline: auto;
    justify-content: center;
    gap: 2rem;
    padding-top: 1rem;
    list-style: none;
  }
  .menu-backdrop {
    display: none !important;
  }
}
.menu-panel a.active {
  color: #999;
  pointer-events: none;
  cursor: default;
}
.menu-toggle {
  font-size: 1.5rem;
  padding: 0.5rem 0.75rem;
}
.hero-text h1 {
  font-size: 2rem;
}
.hero-container,
.operation-container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
  display: flex;
  flex-direction: column;
  padding-top: 1.5rem;
  gap: 2.5rem;
}
.operation {
  margin-top: 2rem;
}
.operation-text {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2.5rem;
}
.operation-text video {
  width: 90%;
  height: auto;
}
.operation-cta {
  display: flex;
  flex-direction: column;
  margin-top: 1rem;
  gap: 1rem;
}
.guide-index,
.comparison {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 2rem;
  gap: 2rem;
}
.comparison table {
  width: 100%;
  max-width: 90%;
  margin: 0 1rem;
  font-size: 0.85rem;
}
.comparison th:nth-child(n + 2),
.comparison td:nth-child(n + 2) {
  text-align: center;
}
.check {
  color: green;
  font-weight: bold;
}
.guide-index ul {
  line-height: 3;
}
.guide-index li {
  margin-bottom: 1rem;
}
.guide-index li a {
  display: inline-block;
  padding-right: 1rem;
  border-radius: 4px;
  text-decoration: none;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease;
}
.guide-index li a:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 20px rgba(37, 101, 216, 0.38);
}
.guide-number {
  display: inline-block;
  width: 2.5rem;
  text-align: center;
  padding: 0.3rem 0;
  margin-right: 0.8rem;
  background-color: #fff;
  color: #2565d8;
  border-radius: 4px;
  box-shadow: 0 3px 6px rgba(37, 101, 216, 0.15);
}
.how-to-use-text,
.explanations-text {
  display: flex;
  flex-direction: column;
  margin-top: 2rem;
  gap: 1rem;
}
.explanations-text h2 {
  margin: 2rem 0;
}
.how-to-use-text h1,
.explanations-text h1,
.explanations-text h2,
.explanations-text h3 {
  text-align: center;
}
.how-to-use-text {
  width: 100%;
  max-width: 90%;
}
.how-to-use-text h2,
.how-to-use-text h3 {
  text-align: left;
}
@media (min-width: 768px) {
  .hero-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin-top: 4rem;
  }
  .hero-text {
    width: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
  }
  .hero-text h1 {
    font-size: 4rem;
  }
  .hero-image {
    width: 50%;
  }
  .operation-text video {
    width: 70%;
  }
  .operation {
    margin-top: 4rem;
  }
  .operation-cta {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 4rem;
  }
  .comparison table {
    width: 50%;
    margin: 0 1rem;
    font-size: 1rem;
  }
  .comparison th,
  .comparison td {
    padding-top: 0.6rem;
  }
  .comparison th:nth-child(2),
  .comparison td:nth-child(2),
  .comparison th:nth-child(3),
  .comparison td:nth-child(3) {
    width: 25%;
  }
}
.site-footer {
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-wrap: anywhere;
  padding-top: 3rem;
  padding-bottom: 1.5rem;
}
.btn {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}
.explanations .btn {
  align-self: center;
}
.explanations .btn-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.btna {
  background-color: #fff;
  color: #2565d8;
  padding: 0.6rem 1rem;
  border-radius: 4px;
  box-shadow: 0 10px 15px rgba(37, 101, 216, 0.3);
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease;
}
.btn-card {
  display: block;
  text-align: left;
  background-color: #fff;
  color: #2565d8;
  width: 220px;
  min-height: 100px;
  padding: 16px 20px;
  border-radius: 12px;
  box-shadow: 0 10px 15px rgba(37, 101, 216, 0.3);
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease;
}
.btn-card:hover,
.btna:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 20px rgba(37, 101, 216, 0.38);
}
.btn-card:focus-visible,
.btna:focus-visible {
  outline: 3px solid #2565d8;
  outline-offset: 4px;
}
.btn-card span {
  display: block;
}
.btn-card-subtitle {
  font-weight: 600;
  text-align: right;
}
@media (min-width: 768px) {
  .btn {
    flex-direction: row;
    gap: 10rem;
  }
  .btna {
    padding: 1rem 1.5rem;
  }
}
@media (max-width: 359px) {
  .btn-card {
    min-height: 60px;
    padding: 8px 16px;
  }
}
.fb-icon {
  display: inline-block;
  width: 16px;
  height: 16px;
  background-color: #1877f2;
  color: white;
  font-weight: bold;
  font-size: 14px;
  line-height: 16px;
  text-align: center;
  border-radius: 3px;
}
.operation-text a,
.explanations-text a {
  color: #1877f2;
  text-decoration: underline;
}
.legal-link {
  font-weight: 400;
  font-size: 1.3rem;
}
form {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 90%;
  max-width: 500px;
  gap: 1rem;
  margin-top: 1rem;
}
form input[type="text"],
form input[type="email"],
form textarea {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid #2565d8;
  border-radius: 4px;
  box-shadow: 0 3px 6px rgba(37, 101, 216, 0.15);
}
form input[type="text"]:focus,
form input[type="email"]:focus,
form textarea:focus {
  outline: 2px solid #2565d8;
  outline-offset: 2px;
}
form textarea {
  min-height: 120px;
  resize: vertical;
}
form label {
  text-align: center;
  font-weight: bold;
  background-color: #f7f8fa;
}
.btn-card#send-message {
  margin-top: 2rem;
}