body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background: #f7f7f7;
    color: #333;
}

header {
    background: #4682B4;
    color: white;
    padding: 1rem;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

header a {
    color: white;
    text-decoration: none;
    margin-right: 1rem;
}

main {
    padding: 1rem;
    max-width: 800px;
    margin: auto;
    background: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form input[type="file"],
form textarea {
    width: 100%;
    padding: 0.5rem;
    margin-top: 0.3rem;
    box-sizing: border-box;
}

form button {
    padding: 0.5rem 1rem;
    background: #4682B4;
    color: white;
    border: none;
    cursor: pointer;
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #ccc;
}

/* Prevent list item borders in the header navigation */
.navbar .navbar-nav > li,
.navbar .navbar-nav > li > a,
.navbar-nav .nav-item,
.navbar-nav .nav-link {
    border-bottom: none !important;
    margin-bottom: 0;
    padding-bottom: 0;
}
.navbar .navbar-nav > li > a{
    padding-top: 0px !important;
}


img {
    max-width: 100%;
    height: auto;
    margin-top: 0.5rem;
}

/* --- 少量スレッドのときに“ボリューム感”を出すスタイル --- */
.thread-list-cozy .list-group-item {
  padding-top: 1.25rem; /* デフォルトより少し広め */
  padding-bottom: 1.25rem;
}
.thread-list-cozy .list-group-item .fw-bold {
  font-size: 1.15rem; /* タイトルをやや大きく */
}
.thread-list-cozy .list-group-item .small {
  font-size: .95rem; /* 補助情報も少しだけ大きく */
}
.thread-list-cozy .badge {
  transform: scale(1.05); /* バッジもわずかに拡大 */
}

.hero {
  background: linear-gradient(135deg, #0d6efd 0%, #6f42c1 100%);
  color: #fff;
  border-radius: .75rem;
  padding: 3rem 2rem;
}
.hero .lead {
  opacity: .95;
}
.section-title {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.section-title .dot {
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  background: #0d6efd;
  box-shadow: 0 0 0 .25rem rgba(13,110,253,.15);
}
.card-hover:hover {
  transform: translateY(-2px);
  box-shadow: 0 .5rem 1rem rgba(0,0,0,.08);
}
.footer {
  color: #6c757d;
}
.category-search {
  max-width: 520px;
}