/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.sp-only {
    display: none;
}

@media screen and (max-width: 768px) {
    .sp-only {
        display: block;
    }
}

@media screen and (min-width: 768px) {
    .sp-only {
        display: none;
    }
}

.container-fluid {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header-banner {
    width: 100%;
}

.header-banner-img {
    width: 100%;
    height: auto;
    display: block;
}

#seminar-list-main-container {
    background-color: #f9f7f2;
}   

#seminar-list-main-container h3 {
    font-size: 2.4rem;
    font-weight: bold;
    color: #2381dc;
    margin-bottom: 30px;
    text-align: center;
}

@media screen and (max-width: 768px) {
    #seminar-list-main-container .seminar-list-contaner-item {
        padding-top: 20px;
        padding-bottom: 10px;
    }
    #seminar-list-main-container .seminar-list-contaner-item img {
        max-width: 80px;
        margin: 0 auto;
    }
    #seminar-list-main-container h3 {
        margin-bottom: 10px;
    }
    #seminar-list-main-container ul {   
        padding: 10px;
    }

}

@media screen and (min-width: 768px) {
    #seminar-list-main-container {
        padding: 40px 0;
    }
    #seminar-list-main-container .seminar-list-contaner-item {
        max-width: 900px;
        margin: 0 auto;
    }
    #seminar-list-main-container .seminar-list-contaner-item img {
        max-width: 120px;
        margin: 0 auto;
    }
}
.seminar-list-header-banner{
    margin-top: 50px;   
}

@media screen and (min-width: 1024px) {
    .seminar-list-header-banner{
      margin-top: 141px;   
    }
}

#seminar-list-main-container ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

#seminar-list-main-container li {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: box-shadow 0.3s ease;
}



#seminar-list-main-container li:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.prefecture {
    background-color: #8b8c85;
    color: white;
    padding: 5px 40px;
    display: inline-block;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 20px;
}

.seminar-title {
    font-size: 1.6rem;
    font-weight: bold;
    margin-bottom: 10px;
    line-height: 1.4;
    text-align: center;
}

.seminar-date {
    font-size: 1.3rem;
    margin-bottom: 8px;
    text-align: center;
}
.seminar-place {
    font-size: 1.3rem;
    margin-bottom: 15px;
    text-align: center;
}
@media screen and (min-width: 768px) {
    #seminar-list-main-container li {
        padding: 40px 80px;
    }
    .seminar-title {
        font-size: 2.4rem;
    }
    .seminar-place, .seminar-date, .seminar-place {
        font-size: 1.8rem;
    }
}



.seminar-btn {
    margin-top: 20px;
    text-align: center;
}

/* カスタムボタンデザイン */
.reservation-btn {
    display: inline-block;
    background-color: #2381dc;
    color: white !important;
    text-decoration: none;
    padding: 12px 60px;
    border-radius: 25px;
    font-weight: bold;
    font-size: 16px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(177, 182, 243, 0.3);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.reservation-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.reservation-btn:hover {
    background-color: #6ba4dd;
    transform: translateY(-2px);
}

.reservation-btn:hover::before {
    left: 100%;
}

.reservation-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(231, 76, 60, 0.3);
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container-fluid {
        padding: 0 15px;
    }

    #main-container h3 {
        font-size: 20px;
    }

    .seminar-title {
        font-size: 16px;
    }

    .seminar-date,
    .seminar-place {
        font-size: 14px;
    }

    .reservation-btn {
        padding: 10px 25px;
        font-size: 14px;
        width: 100%;
        text-align: center;
    }

    #main-container li {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .reservation-btn {
        padding: 12px 20px;
        font-size: 14px;
    }
}