/* =============================================
   Professional Navbar Styles - Trans Power Marine Inspired
   ============================================= */

/* Root Variables for Easy Customization */
:root {
    --nav-primary: #1e3a8a;
    --nav-secondary: #3b82f6;
    --nav-accent: #0ea5e9;
    --nav-gold: #D4AF37;
    --nav-gold-light: #F4E4BC;
    --nav-dark: #1e293b;
    --nav-light: #f8fafc;
    --nav-border: #e2e8f0;
    --nav-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    --nav-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =============================================
   Header Base Styles
   ============================================= */
#topnav {
    background-color: #ffffff;
    box-shadow: var(--nav-shadow);
    padding: 0;
    transition: var(--nav-transition);
    z-index: 1030;
    border-bottom: 1px solid var(--nav-border);
}

#topnav.sticky {
    position: fixed;
    top: 0;
    width: 100%;
}

#topnav.nav-sticky {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Container Layout */
#topnav .container {
    display: flex;
    align-items: center;
    padding: 0 15px;
    position: relative;
}

/* =============================================
   Logo Styles
   ============================================= */
.navbar-brand {
    display: flex;
    align-items: center;
}

.navbar-brand .logo {
    display: flex;
    align-items: center;
    padding: 15px 0;
    transition: var(--nav-transition);
}

.navbar-brand .logo img {
    height: 50px;
    width: auto;
    transition: var(--nav-transition);
}

#topnav.nav-sticky .navbar-brand .logo {
    padding: 12px 0;
}

#topnav.nav-sticky .navbar-brand .logo img {
    height: 45px;
}

/* =============================================
   Navigation Menu
   ============================================= */
#navigation {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: center;
    margin: 0 30px;
}

.navigation-menu {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navigation-menu > li {
    position: relative;
    margin: 0 5px;
}

.navigation-menu > li > a.nav-link {
    display: block;
    padding: 28px 18px;
    color: var(--nav-dark);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    transition: var(--nav-transition);
    position: relative;
    text-decoration: none;
}

/* Hover Effect with Bottom Border */
.navigation-menu > li > a.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--nav-gold) 0%, var(--nav-gold-light) 100%);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.navigation-menu > li:hover > a.nav-link::after,
.navigation-menu > li.active > a.nav-link::after {
    width: 70%;
}

.navigation-menu > li:hover > a.nav-link,
.navigation-menu > li.active > a.nav-link {
    color: var(--nav-primary);
}

/* Menu Arrow for Dropdowns */
.menu-arrow {
    border: solid var(--nav-dark);
    border-width: 0 2px 2px 0;
    display: inline-block;
    padding: 2px;
    margin-left: 5px;
    transform: rotate(45deg);
    transition: var(--nav-transition);
}

.has-submenu:hover .menu-arrow {
    border-color: var(--nav-primary);
    transform: rotate(225deg);
}

/* =============================================
   Dropdown Submenu
   ============================================= */
.navigation-menu .submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: #ffffff;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    border-radius: 8px;
    padding: 12px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--nav-transition);
    list-style: none;
    margin: 0;
    border: 1px solid var(--nav-border);
    z-index: 1000;
}

.navigation-menu .has-submenu:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li {
    position: relative;
}

.submenu li a {
    display: block;
    padding: 10px 20px;
    color: var(--nav-dark);
    font-size: 14px;
    font-weight: 400;
    transition: var(--nav-transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.submenu li a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--nav-gold);
    transform: translateX(-3px);
    transition: transform 0.3s ease;
}

.submenu li a:hover {
    background: linear-gradient(90deg, rgba(30, 58, 138, 0.05) 0%, transparent 100%);
    color: var(--nav-primary);
    padding-left: 25px;
}

.submenu li a:hover::before {
    transform: translateX(0);
}

/* =============================================
   Language Selector
   ============================================= */
.nav-utilities {
    display: flex;
    align-items: center;
    margin-left: auto;
    flex-shrink: 0;
}

.language-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--nav-light);
    border: 1px solid var(--nav-border);
    border-radius: 6px;
    color: var(--nav-dark);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--nav-transition);
    outline: none;
}

.lang-btn:hover {
    background: linear-gradient(135deg, var(--nav-gold) 0%, var(--nav-gold-light) 100%);
    color: var(--nav-dark);
    border-color: var(--nav-gold);
}

.lang-btn i {
    font-size: 16px;
}

.lang-btn .fa-chevron-down {
    font-size: 10px;
    transition: transform 0.3s ease;
}

.language-selector.show .lang-btn .fa-chevron-down {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    min-width: 160px;
    background: #ffffff;
    border: 1px solid var(--nav-border);
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--nav-transition);
    z-index: 1000;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown .dropdown-item {
    display: block;
    padding: 10px 16px;
    color: var(--nav-dark);
    font-size: 14px;
    text-decoration: none;
    transition: var(--nav-transition);
}

.lang-dropdown .dropdown-item:hover {
    background: var(--nav-light);
    color: var(--nav-primary);
    padding-left: 20px;
}

/* =============================================
   Mobile Menu Toggle
   ============================================= */
.menu-extras {
    display: none;
}

.navbar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    cursor: pointer;
    background: transparent;
    border: none;
    outline: none;
}

.navbar-toggle .lines {
    position: relative;
    width: 25px;
    height: 20px;
}

.navbar-toggle .lines span {
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--nav-dark);
    border-radius: 2px;
    transition: var(--nav-transition);
    left: 0;
}

.navbar-toggle .lines span:nth-child(1) {
    top: 0;
}

.navbar-toggle .lines span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.navbar-toggle .lines span:nth-child(3) {
    bottom: 0;
}

/* Active/Open State */
.navbar-toggle.open .lines span:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.navbar-toggle.open .lines span:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.open .lines span:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* =============================================
   Responsive Design
   ============================================= */
@media (max-width: 991px) {
    #topnav .container {
        position: relative;
        justify-content: space-between;
    }

    .menu-extras {
        display: block;
        order: 3;
    }

    #navigation {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        width: 100%;
        background: #ffffff;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1029;
        margin: 0;
    }

    #navigation.show {
        transform: translateX(0);
    }

    .navigation-menu {
        flex-direction: column;
        width: 100%;
        padding: 20px 0;
    }

    .navigation-menu > li {
        width: 100%;
        margin: 0;
        border-bottom: 1px solid var(--nav-border);
    }

    .navigation-menu > li > a.nav-link {
        padding: 15px 20px;
        border: none;
    }

    .navigation-menu > li > a.nav-link::after {
        display: none;
    }

    .navigation-menu .submenu {
        position: static;
        width: 100%;
        box-shadow: none;
        background: var(--nav-light);
        border-radius: 0;
        padding: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        border: none;
    }

    .navigation-menu .has-submenu.open > .submenu {
        display: block;
    }

    .submenu li a {
        padding-left: 40px;
    }

    .nav-utilities {
        margin-left: auto;
        margin-right: 15px;
        position: static;
        transform: none;
    }
}

@media (max-width: 576px) {
    .navbar-brand .logo img {
        height: 40px;
    }

    #topnav.nav-sticky .navbar-brand .logo img {
        height: 35px;
    }

    .lang-btn {
        padding: 6px 12px;
        font-size: 13px;
    }

    .lang-btn span {
        display: none;
    }
}

/* =============================================
   Smooth Scroll & Animations
   ============================================= */
html {
    scroll-behavior: smooth;
}

/* Loading state for navigation */
#navigation.loading {
    pointer-events: none;
    opacity: 0.6;
}

/* Focus styles for accessibility */
.navigation-menu > li > a.nav-link:focus,
.lang-btn:focus,
.navbar-toggle:focus {
    outline: 2px solid var(--nav-accent);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    #topnav {
        position: static;
        box-shadow: none;
        border-bottom: 1px solid #000;
    }
}