/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    background: transparent;
    padding: 0.81rem 0;
    z-index: 1000;
    border-bottom: 1px solid white;
    transition: all 0.3s ease;
}

.header-container {
    width: 100%;
    margin: 0 auto;
    padding: 0 2vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo {
    cursor: pointer;
}

.header-logo a {
    display: flex;
    align-items: center;
}

.logo-image {
    height: 1.625rem;
    width: auto;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-list li a {
    color: white;
    font-size: 1rem;
    font-weight: 400;
    transition: opacity 0.3s ease;
    white-space: nowrap;
}

.nav-list li a:hover {
    opacity: 0.8;
}

.header-contact {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.phone-number {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: white;
}

.phone-main {
    display: flex;
    align-items: center;
    gap: 0rem;
}

.phone-icon {
    font-size: 1.2rem;
}

.phone-text {
    font-family: var(--font-inter);
    font-size: 1.83056rem;
    font-weight: 700;
    letter-spacing: 2.2px;
    line-height: 100%;
}

.phone-hours {
    font-size: 0.81813rem;
    font-style: normal;
    font-weight: 500;
    line-height: 100%; 
    padding-left: 22px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: white;
    transition: all 0.3s ease;
}
.hamburger.active {
    justify-content: flex-end;
}
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(4.5px, 4.5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}
.header-contact-mobile {
    display: none;
}

/* Header Active State */
.header.active {
    background: white;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    /* box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); */
    transition: all 0.3s ease;
}

.header.active .logo-image {
    filter: brightness(0);
}

.header.active .nav-list li a {
    color: var(--black);
}

.header.active .phone-number {
    color: var(--black);
}

.header.active .hamburger span {
    background: var(--white);
}

@media screen and (max-width: 1400px) {
    .header {
        padding: 0;
        /* border-bottom: 0px; */
        height: 3.43rem;
    }
    .header.menu-open {
        background: #BFBFBF;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        /* box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); */
    }
    .header.menu-open .logo-image {
        /* ハンバーガーメニュー展開中はロゴを白のまま表示 */
        filter: none;
    }
    .header.active.menu-open .logo-image {
        /* .header.active の黒化より menu-open を優先 */
        filter: none;
    }
    .header.menu-open .phone-number,
    .header.menu-open .phone-text,
    .header.menu-open .phone-hours {
        color: var(--black);
    }
    .header.menu-open .phone-text {
        font-size: 2.0325rem;
    }

    .header.menu-open .hamburger span {
        background: var(--white);
    }
    .header-container {
        height: 100%;
        padding:0 0 0 2rem ;
    }
    .header-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        height: 100vh;
        background: #EBEBEB;
        flex-direction: column;
        justify-content: flex-start;
        padding: 2rem;
        padding-top: 90px;
        gap: 2rem;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
        margin-top: 3.43rem;
    }

    .header-nav.active {
        transform: translateX(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
        width: 100%;
        max-width: 600px;
    }

    .nav-list li {
        width: 100%;
        text-align: center;
    }

    .nav-list li a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        padding: 0.75rem;
        font-size: 1.0625rem;
        font-weight: 700;
        color: var(--black);
        border-bottom: 1px solid #dcdcdc;
    }
    .nav-list li a::after {
        content: "›";
        font-size: 1.5rem;
        color: var(--black);
    }

    .header-contact {
        flex-direction: column-reverse;
        width: 100%;
        gap: 1rem;
        max-width: 17rem;
        margin-top: 2.5rem;
    }

    .phone-number {
        flex-direction: column;
        text-align: center;
        gap: 0.3rem;
    }
    .header-contact-mobile {
        display: flex;
        align-items: center;
        height: 100%;
    }

    .hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
        background-color: var(--primary-blue);
        padding: 1rem 1.6rem;
        height: 100%;
    }

}
@media screen and (max-width: 1024px) {
    .header-nav {
        gap: 1rem;
    }
}
@media screen and (max-width: 768px) {
    .nav-desktop,
    .cta-button {
        display: none;
    }

    /* base.css で .btn-contact-arrow が768px以下で非表示になるため、
       ハンバーガーメニュー内（.header-nav）だけは矢印を表示させる */
    .header-contact-mobile .btn-contact-arrow {
        display: none;
    }
    .header-nav .btn-contact-arrow {
        display: inline-block;
    }

    .hamburger {
        display: flex;
    }
    .header-container {
        padding:0 0 0 1rem ;
    }
    .logo-image {
        height: 1.25rem;
    }
    .phone-hours {
        line-height: 140%;
        letter-spacing: 0.05rem;
        font-size: 0.88925rem;
    }
}