html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main.container {
  flex: 1;
}

.footer {
  text-align: center;
  padding: 15px 10px;
  background-color: #f5f5f5;
}


/* Reset & Global Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
  background-color: #f8f9fb;
  color: #333;
  line-height: 1.6;
  scroll-behavior: smooth;
}

a {
  color: #123456; /* 상단 메뉴바 색상과 동일한 진한 남색 */
  text-decoration: none;
  font-weight: 600;
}
a:hover {
  text-decoration: underline;
}

/* Navbar */
.navbar {
  background-color: #123456; /* 진한 남색 */
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  color: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  flex-wrap: wrap; /* 모바일 대응 */
}
.navbar .logo {
  font-size: 1.6rem;
  font-weight: bold;
}
.navbar nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.navbar nav a {
  color: white;
  font-weight: 500;
  transition: opacity 0.2s ease;
}
.navbar nav a:hover {
  opacity: 0.85;
}

/* Container */
.container {
  max-width: 900px;
  margin: auto;
  padding: 2rem 1rem;
}

h1 {
  font-size: 2.4rem;
  margin-bottom: 0.5rem;
  text-align: center;
  color: #123456; /* 진한 남색 */
}

/* Card */
.card {
  background-color: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
}
.card h2 {
  margin-bottom: 1rem;
  color: #123456; /* 진한 남색 */
}

/* Textareas & Inputs */
textarea {
  width: 100%;
  min-height: 200px;
  margin-top: 0.8rem;
  padding: 1.2rem;
  font-size: 1.1rem;
  line-height: 1.6;
  font-family: monospace;
  border-radius: 10px;
  border: 1px solid #ccc;
  resize: vertical;
  background-color: #fff;
}
textarea[readonly] {
  background-color: #f1f1f1;
}

input[type="file"] {
  width: 100%;
  margin-top: 0.8rem;
  padding: 1rem;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  background-color: #fff;
}

/* Buttons */
button {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  background: #123456; /* 진한 남색 */
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}
button:hover {
  background: #0f2e4c; /* 더 진한 남색 */
}

/* Image Preview */
.image-preview {
  margin-top: 1rem;
}
.image-preview img {
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid #ddd;
}

/* Info Sections */
.info {
  background-color: #ffffff;
  padding: 2rem;
  margin-top: 3rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}
.info h2 {
  margin-bottom: 1rem;
  color: #123456; /* 진한 남색 */
}
.info p {
  color: #555;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
  color: #666;
  background-color: #f1f1f1;
  margin-top: 3rem;
}

/* Anchor offset for sticky nav */
section[id] {
  scroll-margin-top: 100px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar {
    flex-direction: row;
    align-items: center;
  }
  .navbar nav {
    margin-top: 0;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }
  .navbar nav a {
    display: inline-block;
    margin: 0;
  }
  h1 {
    font-size: 2rem;
  }
}


/* Hamburger Menu - Mobile Only */
@media (max-width: 768px) {
  nav {
    display: none !important;
    flex-direction: column;
    background-color: #1a3b5d; /* match navbar background */
    position: absolute;
    top: 60px;
    right: 10px;
    padding: 12px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    border-radius: 8px;
    z-index: 999;
    width: 180px;
  }

  nav.active {
    display: flex !important;
  }

  nav a {
    margin: 0;
    padding: 12px 16px;
    color: #ffffff;
    font-weight: 500;
    text-align: left;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    background-color: transparent;
    width: 100%;
  }

  nav a:hover {
    background-color: rgba(255,255,255,0.1);
  }

  .hamburger {
    display: block;
    cursor: pointer;
    position: absolute;
    right: 10px;
    top: 15px;
    width: 30px;
    height: 20px;
    z-index: 1000;
  }

  .hamburger div {
    background-color: #ffffff;
    height: 4px;
    margin: 5px 0;
    border-radius: 2px;
  }
}

/* Desktop: Keep navbar inline */
@media (min-width: 769px) {
  .hamburger {
    display: none;
  }

  nav {
    display: flex !important;
    gap: 1rem;
    align-items: center;
    position: static;
  }
}