:root {
    --nav-bg: #2b3033;
    --white: #ffffff;
    --blue: #5fc7ea;
    --yellow: #e6d068;
}

body {
    background-color: var(--blue);
    font-family: 'Montserrat', sans-serif; 
    color: var(--nav-bg);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
    z-index: 3;
}

.page-title {
    text-align: center;
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 40px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.member-group {
    margin-bottom: 40px;
}

.grade-title {
    font-size: 2.2rem;
    color: var(--white);
    padding-bottom: 10px;
    border-bottom: 3px solid var(--yellow);
    margin-bottom: 20px;
}

.member-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, 250px);
    gap: 25px;
    /* ★★★ 修正点：常に左揃えになるように justify-content を変更 ★★★ */
    justify-content: flex-start; 
}

.member-card {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

a.profile-link {
    text-decoration: none;
    color: inherit;
}

.profile-pic {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 15px;
    border: 5px solid var(--yellow);
    flex-shrink: 0;
}

.member-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    flex-grow: 1; 
}

.member-name {
    font-weight: bold;
    font-size: 1.4rem;
    text-align: center;
    flex-grow: 1;
    display: flex;
    align-items: center;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding-top: 10px; 
    min-height: 28px;
    flex-shrink: 0;
}

.social-icon {
    width: 28px;
    height: 28px;
    transition: transform 0.2s ease;
}

.social-icon:hover {
    transform: scale(1.15);
}

.keywords-container {
    margin-top: 10px;
    min-height: 20px;
    line-height: 1.5;
}

.keyword-tag {
    display: inline-block;
    background-color: var(--blue);
    color: white;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.8em;
    margin: 3px;
    font-weight: 500;
}

.logo {
    position: fixed;
    bottom: 3vh;
    left: 3vw;
    z-index: 2;
}

.logo i {
    font-size: 9vh;
    color: var(--nav-bg);
}

@media (max-width: 640px) {
    .logo i {
        font-size: 7vh;
    }
    /* スマートフォン表示では中央揃えに戻す */
    .member-list {
        justify-content: center;
    }
}