/* Navigation styles */
.nav-menu {
    background: #1e293b;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 1rem 0 !important;
    position: sticky;
    top: 0;
    z-index: 1000;
    margin: 0 !important;
}

.nav-menu .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar header for mobile */
.navbar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    color: white;
    margin: 0;
    font-size: 1.5rem;
}

/* Hamburger button */
.navbar-toggler {
    display: none;
    background: transparent;
    border: 1px solid white;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    flex-direction: column;
    justify-content: space-around;
    width: 40px;
    height: 35px;
}

.navbar-toggler-icon {
    display: block;
    width: 22px;
    height: 2px;
    background-color: white;
    border-radius: 1px;
    transition: all 0.3s;
}

/* Active state - X shape */
.navbar-toggler.active .navbar-toggler-icon:nth-child(1) {
    transform: rotate(-45deg) translate(-4px, 5px);
}

.navbar-toggler.active .navbar-toggler-icon:nth-child(2) {
    opacity: 0;
}

.navbar-toggler.active .navbar-toggler-icon:nth-child(3) {
    transform: rotate(45deg) translate(-4px, -5px);
}

/* Navbar collapse container */
.navbar-collapse {
    display: block;
}

.nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 2rem;
    align-items: center;
    margin-top: 1rem;
}

.nav-links a,
.nav-links a:link,
.nav-links a:visited {
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    text-decoration: none !important;
}

/* Desktop styles - 使用 Grid 佈局 */
@media (min-width: 769px) {
    .nav-menu .container {
        display: grid !important;
        grid-template-columns: auto 1fr !important;
        align-items: center !important;
        gap: 3rem !important;
    }

    .navbar-header {
        grid-column: 1 !important;
    }

    .navbar-collapse {
        grid-column: 2 !important;
        justify-self: end !important;
    }

    .nav-links {
        margin: 0 !important;
        display: flex !important;
        gap: 2rem !important;
    }

    /* 桌面版連結顯示白色 */
    .nav-links a,
    .nav-links a:link,
    .nav-links a:visited {
        color: white !important;
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: #e5e7eb !important;
    }

    /* 確保漢堡按鈕在桌面版完全隱藏 */
    .navbar-toggler {
        display: none !important;
        visibility: hidden !important;
    }
}

/* Mobile responsive */
@media (max-width: 768px) {
    /* 修正手機版導航欄高度 - 固定高度 */
    .nav-menu {
        padding: 0 !important;
        min-height: 60px !important;
        max-height: 60px !important;
        height: 60px !important;
        display: flex !important;
        align-items: center !important;
    }

    .nav-menu .container {
        padding: 0 1rem !important;
        height: 100% !important;
        display: flex !important;
        align-items: center !important;
    }

    /* 顯示漢堡按鈕 - 粉紫色系 */
    .navbar-toggler {
        display: block !important;
        position: fixed !important;
        right: 15px !important;
        top: 10px !important;
        z-index: 9999 !important;
        background: linear-gradient(135deg, #f5e6ff 0%, #e8d5ff 100%) !important;
        border: 2px solid #9b59b6 !important;
        padding: 5px 10px !important;
        width: 45px !important;
        height: 40px !important;
        box-shadow: 0 2px 8px rgba(155, 89, 182, 0.2) !important;
        transition: all 0.3s ease !important;
    }

    .navbar-toggler:hover {
        background: linear-gradient(135deg, #e8d5ff 0%, #d4b8ff 100%) !important;
        box-shadow: 0 4px 12px rgba(155, 89, 182, 0.3) !important;
    }

    .navbar-toggler-icon {
        background-color: #7c3aed !important;
        height: 3px !important;
        margin: 4px 0 !important;
        display: block !important;
    }

    /* 手機版 navbar header - 佔滿整個容器 */
    .navbar-header {
        width: 100% !important;
        height: 100% !important;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .nav-brand {
        margin: 0 !important;
        padding: 0 !important;
    }

    .nav-brand h1 {
        font-size: 1.25rem !important;
        margin: 0 !important;
        padding: 0 !important;
        line-height: 1 !important;
    }

    /* 隱藏導航選單 - 完全不占空間 */
    .navbar-collapse {
        display: none !important;
        position: absolute !important;
        visibility: hidden !important;
        height: 0 !important;
        overflow: hidden !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    /* 顯示導航選單 - 深色背景 */
    .navbar-collapse.show {
        display: block !important;
        position: fixed !important;
        visibility: visible !important;
        height: auto !important;
        top: 60px !important;
        left: 0 !important;
        right: 0 !important;
        background: linear-gradient(180deg, #1e293b 0%, #334155 100%) !important;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3) !important;
        padding: 1rem 0 !important;
        border-top: 1px solid #475569 !important;
        z-index: 9998 !important;
        overflow: visible !important;
    }

    /* 垂直排列連結 - 強制移除所有 margin */
    .nav-links {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0 !important;
        padding: 0 !important;
        margin: 0 !important;
        margin-top: 0 !important;
    }

    /* 確保未展開時完全不占空間 */
    .navbar-collapse:not(.show) .nav-links {
        display: none !important;
        margin: 0 !important;
        padding: 0 !important;
        height: 0 !important;
    }

    .nav-links li {
        width: 100% !important;
        display: block !important;
    }

    .nav-links a {
        display: block !important;
        padding: 1rem 2rem !important;
        border-bottom: 1px solid #475569 !important;
        text-align: left !important;
        background: transparent !important;
        color: #e2e8f0 !important;
        font-weight: 500 !important;
        transition: all 0.3s ease !important;
    }

    .nav-links a:hover,
    .nav-links a:active {
        background: linear-gradient(90deg, #475569 0%, #64748b 100%) !important;
        color: #ffffff !important;
        padding-left: 2.5rem !important;
    }

    .nav-links a.active {
        background: linear-gradient(90deg, #7c3aed 0%, #9333ea 100%) !important;
        color: #ffffff !important;
        font-weight: 600 !important;
    }

    .nav-links li:last-child a {
        border-bottom: none !important;
    }

    /* 動畫效果 */
    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .navbar-collapse.show .nav-links li {
        animation: slideDown 0.3s ease forwards;
    }

    .navbar-collapse.show .nav-links li:nth-child(1) { animation-delay: 0.05s; }
    .navbar-collapse.show .nav-links li:nth-child(2) { animation-delay: 0.1s; }
    .navbar-collapse.show .nav-links li:nth-child(3) { animation-delay: 0.15s; }
    .navbar-collapse.show .nav-links li:nth-child(4) { animation-delay: 0.2s; }
    .navbar-collapse.show .nav-links li:nth-child(5) { animation-delay: 0.25s; }
}