/* Header Styles - Shared across all pages */

        /* Google Font Import */
        @import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP&display=swap');

        .header {
            background: #f5f5f7;
            padding: 1rem 2rem;
            border-bottom: 1px solid #ddd;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .header-content {
            width: 100%;
            max-width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 0rem;
        }

        .header-logo {
            height: 45px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            padding: 6px;
            border-radius: 4px;
            flex-shrink: 0;
        }

        .header-logo img {
            max-height: 100%;
            max-width: 100%;
            height: auto;
            width: auto;
            display: block;
            object-fit: contain;
        }

        .header-left nav {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 2rem;
            padding-top: 0.15rem;
        }

        .header h1 {
            font-family: "Noto Sans JP", sans-serif;
            font-size: 1.3rem;
            font-weight: 400;
            color: #000;
        }

        .header a {
            color: #000;
            text-decoration: none;
        }

        .nav-link {
            color: #000;
            text-decoration: none;
            font-size: 0.9rem;
            padding-bottom: 0.25rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s;
            font-weight: 500;
            letter-spacing: -0.01em;
        }

        .nav-link:hover {
            border-bottom-color: #000;
        }

        .nav-link.active {
            border-bottom-color: #000;
        }

        .header-right {
            display: flex;
            gap: 1.1rem;
            align-items: center;
        }

        .user-info {
            font-size: 0.9rem;
            color: #666;
            padding-bottom: 0.25rem;
            border-bottom: 2px solid transparent;
        }

        .header-btn {
            color: #000;
            text-decoration: none;
            font-size: 0.9rem;
            padding-bottom: 0.25rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s;
            background: none;
            border: none;
            cursor: pointer;
            font-weight: 500;
            letter-spacing: -0.01em;
        }

        .header-btn:hover {
            border-bottom-color: #000;
        }

        /* Mobile Menu Styles */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
            color: #000;
        }

        .mobile-menu {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #f5f5f7;
            z-index: 1001;
            transition: right 0.3s ease;
            overflow-y: auto;
            box-shadow: -2px 0 10px rgba(0,0,0,0.1);
        }

        .mobile-menu.active {
            right: 0;
        }

        .mobile-menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(0,0,0,0.5);
            z-index: 1000;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .mobile-menu-overlay.active {
            opacity: 1;
            pointer-events: all;
        }

        .mobile-menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            border-bottom: 1px solid #ddd;
        }

        .mobile-menu-header h2 {
            font-family: "Noto Sans JP", sans-serif;
            font-size: 1.3rem;
            font-weight: 400;
            color: #000;
        }

        .mobile-menu-close {
            background: none;
            border: none;
            font-size: 2rem;
            cursor: pointer;
            color: #000;
            padding: 0;
            line-height: 1;
        }

        .mobile-menu-links {
            display: flex;
            flex-direction: column;
            padding: 1rem 0;
        }

        .mobile-menu-link {
            color: #000;
            text-decoration: none;
            font-size: 1.1rem;
            padding: 1rem 1.5rem;
            font-weight: 500;
            letter-spacing: -0.01em;
            border-bottom: 1px solid #e5e5e5;
            transition: background 0.2s;
        }

        .mobile-menu-link:hover {
            background: #e8e8e8;
        }

        .mobile-menu-link.active {
            background: #000;
            color: #fff;
        }

        .mobile-menu-email {
            color: #666;
            font-size: 0.9rem;
            padding: 1rem 1.5rem;
            border-top: 1px solid #ddd;
            font-weight: 400;
        }

        /* Responsive - Mobile Menu Toggle */
        @media (max-width: 768px) {
            .header {
                padding: 1rem .3rem;
                justify-content: flex-start;
            }
            
            .header-content {
                justify-content: space-between;
                padding-right: 1rem;
            }
            
            .header-left {
                justify-content: flex-start;
            }
            
            .mobile-menu-btn {
                display: block;
            }

            .header-left nav {
                display: none;
            }

            .header-right .user-info {
                display: none;
            }

            .header-right .header-btn {
                display: none;
            }

            .header-logo {
                height: 44px;
                width: auto;
                padding: 5px;
                justify-content: flex-start;
            }
        }

        /* Profile Circle Button Styles */
        .profile-icon-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            color: #000; /* Black icon color */
            text-decoration: none;
            transition: opacity 0.2s ease, transform 0.2s ease;
            border: none;
            background: none;
        }

        .profile-icon-btn:hover {
            opacity: 0.6;
            transform: translateY(-1px);
        }

        /* Hide on Mobile (matching your existing breakpoint) */
        @media (max-width: 768px) {
            .profile-icon-btn {
                display: none;
            }
        }