/* 導覽列樣式 - 支援響應式重新渲染 */

/* 基礎樣式 */
#main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-brand:hover {
    color: var(--color-primary);
}

/* 桌面版樣式 */
.nav-desktop {
    .nav-menu {
        display: flex;
        list-style: none;
        margin: 0;
        padding: 0;
        gap: 2rem;
    }

    .nav-link {
        color: var(--color-text-secondary);
        text-decoration: none;
        font-weight: 500;
        padding: 0.5rem 1rem;
        border-radius: 0.5rem;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .nav-link:hover {
        color: var(--color-text);
        background: var(--color-surface-hover);
    }

    .nav-link.active {
        color: var(--color-primary);
        background: var(--color-surface-hover);
    }

    .nav-toggle {
        display: none;
    }
}

/* 行動版樣式 */
.nav-mobile {
    .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 44px;
        height: 44px;
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: 8px;
        cursor: pointer;
        padding: 8px;
        z-index: 1001;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .hamburger-line {
        width: 20px;
        height: 2px;
        background: var(--color-text);
        margin: 2px 0;
        transition: all 0.3s ease;
        border-radius: 1px;
    }

    .nav-toggle.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .nav-mobile-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        list-style: none;
        margin: 0;
        padding: 1rem 0;
        display: none;
        flex-direction: column;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .nav-mobile-menu.active {
        display: flex;
    }

    .nav-mobile-menu li {
        margin: 0;
    }

    .nav-mobile-menu .nav-link {
        display: block;
        padding: 1rem 2rem;
        color: var(--color-text-secondary);
        text-decoration: none;
        font-weight: 500;
        transition: all 0.3s ease;
        border-left: 3px solid transparent;
    }

    .nav-mobile-menu .nav-link:hover {
        color: var(--color-text);
        background: var(--color-surface-hover);
        border-left-color: var(--color-primary);
    }

    .nav-mobile-menu .nav-link.active {
        color: var(--color-primary);
        background: var(--color-surface-hover);
        border-left-color: var(--color-primary);
    }
}

/* 響應式斷點 */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-brand {
        font-size: 1.25rem;
    }
}

/* 動畫效果 */
.nav-mobile-menu {
    transition: all 0.3s ease;
    transform: translateY(-10px);
    opacity: 0;
}

.nav-mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
}

/* 防止內容被導覽列遮擋 */
body {
    padding-top: 70px;
}

@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }
}