/* Header */
.header {
    position: fixed;
    z-index: 1000;
    top: 64px;
    margin-left: 40px;
}

.header-logo {
    opacity: 1;
    margin-bottom: 40px;
}

.header-logo a {
    text-decoration: none;
    border: none;
}

.header img {
    width: 115px;
    height: 34px;
}

.nav-menu {
    display: block;
    list-style: none;
    gap: 40px;
}

.nav-menu li {
    margin-bottom: 25px;
}

.nav-menu li a {
    text-align: left;
    text-decoration: none;
    font: normal normal normal 16px/24px Zen Kaku Gothic New;
    letter-spacing: 0px;
    color: #000;
    opacity: 1;
    transition: color 0.3s ease;
    text-decoration: none;
    border: none;
}

.nav-menu li a:hover {
    color: #FFA811;
}

.nav-overlay,
.menu-toggle {
    display: none;
}

/* mobile */
@media (max-width: 767px) {
    /* Mobile Header */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 48px;
        line-height: 48px;
        z-index: 1000;
        margin-left: 0;
    }

    /* Logo Area */
    .header-logo-area {
        background-color: #fff;
        padding: 0;
        text-align: center;
    }

    .header-logo {
        display: inline-block;
        margin-bottom: 0;
    }

    .header-logo h1 {
        margin: 0;
    }

    .header-logo img {
        width: 60px;
        height: auto;
    }

    /* Menu Toggle Button */
    .menu-toggle {
        position: fixed;
        top: 8px;
        left: 8px;
        width: 48px;
        height: 48px;
        background: #fff;
        border: none;
        border-radius: 50%;
        cursor: pointer;
        z-index: 1001;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: transform 0.3s ease;
    }

    .menu-toggle:hover {
        transform: scale(1.1);
        background: transparent;
    }

    .menu-toggle span {
        width: 18px;
        height: 2px;
        background-color: #000;
        margin: 2px 0;
        transition: 0.3s;
        border-radius: 1px;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-4px, 4px);
    }

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

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-4px, -4px);
    }

    /* Full Screen Navigation Overlay */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: #F5F1ED;
        backdrop-filter: blur(10px);
        z-index: 999;
        display: flex;
        justify-content: flex-start;
        align-items: flex-start;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        padding: 120px 0 0 40px;
    }

    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
        background: #F5F1ED;
    }

    .nav-content {
        text-align: left;
        position: relative;
        width: 100%;
    }

    .nav-menu {
        list-style: none;
        padding: 0;
        margin: 0;
        text-align: left;
        display: block;
    }

    .nav-menu li {
        margin: 25px 0;
    }

    .nav-menu li a {
        text-decoration: none;
        font: normal normal normal 20px/30px Zen Kaku Gothic New;
        letter-spacing: 2px;
        color: #000;
        transition: color 0.3s ease;
        position: relative;
    }

    .nav-menu li a::after {
        content: '';
        position: absolute;
        width: 0;
        height: 2px;
        bottom: -5px;
        left: 50%;
        background-color: #FFA811;
        transition: all 0.3s ease;
    }

    .nav-menu li a:hover::after {
        width: 100%;
        left: 0;
    }
}