body {
  font-family: "Roboto", sans-serif;
  line-height: 1.6;
  color: #424242;
  background-color: #f5f5f5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
}

h1,
h2,
h3 {
  font-weight: 500;
  margin-top: 1.5em;
  margin-bottom: 0.8em;
  color: #212121;
}
h1 {
  font-size: 2.5rem;
}
h2 {
  font-size: 2rem;
}
h3 {
  font-size: 1.75rem;
}

[id] {
  scroll-margin-top: 80px;
}

.main-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 2rem;
  margin-top: 1rem;
  font-weight: 700;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.subsection-title {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1em;
}

ul,
ol {
  margin-bottom: 1em;
  padding-left: 20px;
}
li {
  margin-bottom: 0.5em;
}
.list-disc {
  list-style-type: disc;
}
.ml-6 {
  margin-left: 1.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1em;
  overflow-x: auto;
  display: block;
}
th,
td {
  border: 1px solid #e0e0e0;
  padding: 12px;
  text-align: left;
}
th {
  background-color: #eeeeee;
  font-weight: 500;
}
table tbody tr:hover {
  background-color: #f0f0f0;
  transition: background-color 0.2s ease-in-out;
}
.data-table {
  min-width: 600px;
}
.header-style {
  background-color: #ffffff;
  color: #424242;
  padding: 1rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  border-bottom-left-radius: 0.5rem;
  border-bottom-right-radius: 0.5rem;
}

.header-container {
  position: fixed;
  left: 4px;
  right: 4px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  margin: 0;
}
@media (min-width: 640px) {
  .header-container {
    flex-direction: row;
  }
}

.header-title {
  margin: auto;
  display: block;
}
@media (min-width: 640px) {
  .header-title {
    text-align: center;
  }
  .header-container {
    justify-content: center;
  }
}

.navbar-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
  padding: 0;
  margin: 0;
}
.navbar-list li {
  margin-bottom: 0;
}

.navbar-list li:not(:last-child) {
  margin-right: 0.75rem;
}
@media (min-width: 640px) {
  .navbar-list li:not(:last-child) {
    margin-right: 1.5rem;
  }
}

.navbar-link {
  color: #424242;
  font-weight: 500;
  transition: color 0.2s ease-in-out;
  text-decoration: none;
  font-size: 0.875rem;
}
.navbar-link:hover {
  color: #212121;
  text-decoration: underline;
}
@media (min-width: 640px) {
  .navbar-link {
    font-size: 1rem;
  }
}
*/ .main-content-style {
  flex-grow: 1;
  background-color: #ffffff;
  border-radius: 0.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  margin-left: 10px;
  margin-right: 10px;
  margin-top: 20rem;
  margin-bottom: 2rem;
  padding: 1.5rem;
}

.section-card {
  margin-bottom: 2rem;
  padding: 1rem;
  border-radius: 0.5rem;
  background-color: #fafafa;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.image-container {
  max-width: 1000px;
  display: flex;
  gap: 1rem;
  margin: auto;
  flex-direction: column;
  margin-right: 1em;
  margin-left: 1em;
}

@media (min-width: 640px) {
  .image-container {
    flex-direction: row;
  }
}

.image-wrapper {
  display: flex;
  justify-content: center;
}
.section-image {
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  width: 100%;
  max-width: 36rem;
  height: auto;
}

.read-more-btn {
  display: inline-block;
  background-color: #e0e0e0;
  color: #424242;
  padding: 8px 16px;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 500;
  transition: background-color 0.2s ease-in-out;
  margin-top: 10px;
  text-decoration: none;
}
.read-more-btn:hover {
  background-color: #bdbdbd;
}
.hidden-content {
  display: none;
}

.footer-style {
  display: flex;
  justify-content: space-between;
  background-color: #ffffff;
  color: #424242;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1),
    0 -2px 4px -1px rgba(0, 0, 0, 0.06);
  margin-top: 2rem;
  border-top-left-radius: 0.5rem;
  border-top-right-radius: 0.5rem;
}

.hero-section {
  width: 100%;
  padding: 4rem 1rem 3rem 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  margin-top: 5.5rem;
}
.hero-content {
  max-width: 900px;
  text-align: center;
}
.hero-title {
  font-size: 2.8rem;
  font-weight: 700;
  color: #212121;
  margin-bottom: 1rem;
}
.hero-subtitle {
  font-size: 1.35rem;
  color: #424242;
  font-weight: 400;
  margin-bottom: 0;
}
@media (max-width: 640px) {
  .hero-section {
    padding: 2.5rem 0.5rem 2rem 0.5rem;
    margin-top: 6.5rem;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-subtitle {
    font-size: 1rem;
  }
}

.cable-calc-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
  margin-top: 2rem;
  margin-bottom: 2rem;
}
.cable-calc-form {
  flex: 1 1 250px;
  min-width: 220px;
}
.cable-calc-form label {
  display: block;
  margin-top: 1.2rem;
  font-weight: 500;
  color: #212121;
}
.cable-calc-form input,
.cable-calc-form select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  margin-top: 0.4rem;
  font-size: 1rem;
  border: 1px solid #e0e0e0;
  border-radius: 0.3rem;
  background: #fafafa;
  box-sizing: border-box;
  margin-bottom: 0.2rem;
}
.cable-calc-result {
  flex: 1 1 200px;
  margin-top: 1.2rem;
  font-size: 1.3rem;
  font-weight: 600;
  color: #212121;
  background: #f5f5f5;
  border-radius: 0.5rem;
  padding: 1.2rem 1rem;
  min-width: 180px;
  width: full;
  height: 250px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}
@media (max-width: 700px) {
  .cable-calc-container {
    flex-direction: column;
    gap: 1rem;
  }
  .cable-calc-result {
    margin-top: 0.5rem;
    padding: 1rem 0.7rem;
    font-size: 1.1rem;
  }
}

.result-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0 auto;
  font-size: 1.3rem;
  font-weight: 600;
  color: #212121;
  background: #f5f5f5;
  border-radius: 0.5rem;
  padding: 1.2rem 1rem;
  min-width: 180px;
  width: 100%;
  max-width: 350px;
  height: 250px;
}
@media (max-width: 700px) {
  .result-box {
    padding: 1rem 0.7rem;
    font-size: 1.1rem;
    height: auto;
    min-width: 120px;
    max-width: 100%;
  }
}