/* ===================================================
   CSS Variables
=================================================== */
:root {
  --primary-color: #1A2A38;
  --accent-color: #E67E22;
  --secondary-color: #2980B9;
  --light-bg: #f8f8f8;
  --gallery-bg: #f4f4f4;
  --text-color: #333;
  --body-font: 'Arial', sans-serif;
  --transition-speed: 0.3s;
}

/* ===================================================
   Global Styles
=================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--body-font);
}

body {
  background-color: var(--light-bg);
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
}

/* ===================================================
   Header Styling
=================================================== */
.main-header {
  background-color: var(--primary-color);
  color: #fff;
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.main-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo img {
  max-width: 150px;
  height: auto;
  display: block;
}

.site-title {
  font-size: 36px;
  font-weight: 700;
  text-transform: uppercase;
  text-align: center;
  margin: 0 auto;
}

/* Navigation Styling */
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

.main-nav a {
  color: #fff;
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  transition: color var(--transition-speed) ease;
}

.main-nav a:hover {
  color: var(--accent-color);
}

/* ===================================================
   Hero Section Styling
=================================================== */
.kv {
  background-color: var(--secondary-color);
  color: #fff;
  padding: 100px 20px;
  text-align: center;
}

.kv .item-kv-txt h2 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 20px;
}

.kv .item-kv-txt h3 {
  font-size: 24px;
  font-weight: 300;
  margin-bottom: 30px;
}

.kv .btn {
  background-color: var(--accent-color);
  color: #fff;
  padding: 12px 30px;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 500;
  transition: background-color var(--transition-speed) ease;
  animation: blink 1.5s infinite;
}

.kv .btn:hover {
  background-color: var(--primary-color);
}

@keyframes blink {
  0%, 100% {
    background-color: var(--accent-color);
  }
  50% {
    background-color: var(--secondary-color);
  }
}

/* ===================================================
   Gallery Section Styling
=================================================== */
.gallery-section {
  background-color: var(--gallery-bg);
  padding: 60px 20px;
}

.gallery-section .section-title {
  font-size: 36px;
  text-align: center;
  margin-bottom: 40px;
  font-weight: 600;
}

.gallery-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.gallery-card {
  width: calc(25% - 20px); /* 4 cards per row */
  background-color: #fff;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.gallery-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.gallery-card img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.gallery-card-info {
  margin-top: 15px;
}

.gallery-card-info p {
  font-size: 16px;
  color: var(--text-color);
  font-weight: bold;
  margin-bottom: 10px;
}

.gallery-card-info .btn {
  background-color: var(--accent-color);
  color: #fff;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
  font-weight: 500;
  display: inline-block;
  margin-top: 10px;
  transition: background-color var(--transition-speed) ease;
}

.gallery-card-info .btn:hover {
  background-color: var(--primary-color);
}

.gallery-card-info .btn i {
  margin-right: 8px;
}

/* ===================================================
   About Us Section Styling
=================================================== */
.about-us-container {
  background-color: #fff;
  padding: 60px 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.about-us-container .section-title {
  font-size: 36px;
  text-align: center;
  margin-bottom: 40px;
  font-weight: 600;
}

.about-us-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  gap: 40px;
}

.about-us-text {
  width: 60%;
}

.about-us-text h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.about-us-text p {
  font-size: 16px;
  color: #555;
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-us-image {
  width: 35%;
  text-align: center;
}

.about-us-image img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* ===================================================
   Video Section Styling
=================================================== */
.video-section {
  padding: 60px 20px;
  text-align: center;
}

.video-container {
  max-width: 1200px;
  margin: 0 auto;
}

.video-container video {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* ===================================================
   Footer Styling
=================================================== */
.main-footer {
  background-color: var(--primary-color);
  color: #fff;
  padding: 50px 20px;
}

.main-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.col-logo {
  width: 25%;
}

.col-logo img {
  max-width: 150px;
  height: auto;
}

.col-sns {
  width: 50%;
  text-align: center;
}

.sns {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  gap: 20px;
}

.sns i {
  font-size: 24px;
  color: #fff;
  transition: color var(--transition-speed) ease;
}

.sns i:hover {
  color: var(--accent-color);
}

.col-contact {
  width: 25%;
  text-align: right;
}

.col-contact h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.col-contact p {
  font-size: 14px;
  margin-bottom: 5px;
}

.col-contact a {
  color: #fff;
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

.col-contact a:hover {
  color: var(--accent-color);
}

/* ===================================================
   Responsive Design
=================================================== */
@media (max-width: 768px) {
  .main-info {
    flex-direction: column;
    text-align: center;
  }

  .logo img {
    margin-bottom: 10px;
  }

  .site-title {
    font-size: 28px;
  }

  .kv .item-kv-txt h2 {
    font-size: 36px;
  }

  .kv .item-kv-txt h3 {
    font-size: 18px;
  }

  .gallery-card {
    width: calc(50% - 20px); /* 2 cards per row */
  }

  .about-us-content {
    flex-direction: column;
    text-align: center;
  }

  .about-us-text,
  .about-us-image {
    width: 100%;
  }

  .about-us-image {
    margin-top: 20px;
  }

  .main-footer .container {
    flex-direction: column;
    text-align: center;
  }

  .col-logo,
  .col-sns,
  .col-contact {
    width: 100%;
    margin-bottom: 20px;
  }

  .col-contact {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .gallery-card {
    width: 100%; /* 1 card per row */
  }
}