/* ================================================
   ZMCOR Navigation Bar v3.0
   Modern Business Professional Design
   ================================================ */

/* ===== Typography Enhancement ===== */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

/* ===== CSS Variables for Navbar ===== */
:root {
    /* Navbar-specific colors */
    --nav-bg: rgba(255, 255, 255, 0.95);
    --nav-bg-solid: #ffffff;
    --nav-border: rgba(0, 0, 0, 0.04);
    --nav-shadow: 0 1px 0 0 rgba(0, 0, 0, 0.04);
    --nav-shadow-scrolled: 0 4px 20px -4px rgba(0, 0, 0, 0.08),
                           0 1px 0 0 rgba(0, 0, 0, 0.04);

    /* Link colors */
    --nav-link-color: #1f2937;
    --nav-link-muted: #6b7280;
    --nav-link-hover: #0f172a;
    --nav-link-active: #1d4ed8;

    /* Accent colors */
    --nav-accent-primary: #1d4ed8;
    --nav-accent-primary-light: rgba(29, 78, 216, 0.08);
    --nav-accent-gradient: linear-gradient(135deg, #1d4ed8 0%, #3b82f6 100%);
    --nav-cta-gradient: linear-gradient(135deg, #ea580c 0%, #f97316 100%);
    --nav-cta-hover: linear-gradient(135deg, #c2410c 0%, #ea580c 100%);

    /* Timing */
    --nav-ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --nav-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Enhanced Header ===== */
.header {
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--nav-border);
    box-shadow: var(--nav-shadow);
    position: sticky;
    top: 0;
    z-index: var(--z-index-sticky, 1020);
    transition: box-shadow 0.3s var(--nav-ease),
                background 0.3s var(--nav-ease);
}

.header.scrolled {
    --nav-bg: rgba(255, 255, 255, 0.98);
    box-shadow: var(--nav-shadow-scrolled);
}

/* ===== Navbar Container ===== */
.navbar {
    padding: 0;
    transition: padding 0.3s var(--nav-ease);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    height: 64px;
}

/* ===== Enhanced Logo ===== */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--nav-link-color);
    text-decoration: none;
    position: relative;
    transition: opacity 0.2s var(--nav-ease);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    flex-shrink: 0;
    transition: transform 0.3s var(--nav-ease-out);
}

.logo:hover .logo-icon {
    transform: scale(1.05);
}

.logo-text {
    letter-spacing: -0.02em;
    color: var(--nav-link-color);
}

/* ===== Navigation Menu ===== */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
    margin: 0;
    padding: 0;
    height: 100%;
}

.nav-menu > li {
    height: 100%;
    display: flex;
    align-items: center;
}

/* ===== Enhanced Nav Links ===== */
.nav-link {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.875rem;
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--nav-link-muted);
    text-decoration: none;
    border-radius: 6px;
    position: relative;
    transition: color 0.15s var(--nav-ease),
                background 0.15s var(--nav-ease);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--nav-link-hover);
    background: rgba(0, 0, 0, 0.04);
}

/* Active state */
.nav-link.active {
    color: var(--nav-link-active);
    font-weight: 600;
}

/* ===== Primary CTA Link ===== */
.nav-link--primary {
    background: var(--nav-cta-gradient);
    color: #ffffff !important;
    font-weight: 600;
    padding: 0.5rem 1.125rem;
    border-radius: 6px;
    box-shadow: 0 1px 2px rgba(234, 88, 12, 0.2),
                0 1px 1px rgba(0, 0, 0, 0.06);
    transition: transform 0.15s var(--nav-ease),
                box-shadow 0.15s var(--nav-ease),
                background 0.15s var(--nav-ease);
}

.nav-link--primary:hover {
    background: var(--nav-cta-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(234, 88, 12, 0.25),
                0 2px 4px rgba(0, 0, 0, 0.08);
}

.nav-link--primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(234, 88, 12, 0.2);
}

/* ===== Dropdown Navigation ===== */
.nav-dropdown {
    position: relative;
    height: 100%;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--nav-link-muted);
    background: none;
    border: none;
    cursor: pointer;
    border-radius: 6px;
    transition: color 0.15s var(--nav-ease),
                background 0.15s var(--nav-ease);
}

.nav-dropdown-toggle:hover {
    color: var(--nav-link-hover);
    background: rgba(0, 0, 0, 0.04);
}

.nav-dropdown-toggle svg {
    width: 10px;
    height: 10px;
    opacity: 0.6;
    transition: transform 0.2s var(--nav-ease),
                opacity 0.15s var(--nav-ease);
}

.nav-dropdown-toggle:hover svg {
    opacity: 1;
}

.nav-dropdown-toggle[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.nav-dropdown-menu {
    position: absolute;
    top: calc(100% - 8px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 240px;
    padding: 0.5rem;
    background: var(--nav-bg-solid);
    border: 1px solid var(--nav-border);
    border-radius: 12px;
    box-shadow: 0 10px 40px -8px rgba(0, 0, 0, 0.15),
                0 4px 12px -2px rgba(0, 0, 0, 0.08);
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s var(--nav-ease),
                visibility 0.2s var(--nav-ease),
                transform 0.2s var(--nav-ease);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown-toggle[aria-expanded="true"] + .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu li a {
    display: block;
    padding: 0.625rem 0.875rem;
    color: var(--nav-link-color);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 8px;
    transition: background 0.15s var(--nav-ease),
                color 0.15s var(--nav-ease);
}

.nav-dropdown-menu li a:hover {
    background: var(--nav-accent-primary-light);
    color: var(--nav-accent-primary);
}

/* Dropdown Headers */
.dropdown-header {
    padding: 0.625rem 0.875rem 0.375rem;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--nav-link-muted);
}

.dropdown-divider {
    height: 1px;
    margin: 0.375rem 0.875rem;
    background: var(--nav-border);
}

/* ===== Language Selector ===== */
.nav-item.language-menu {
    margin-left: 0.5rem;
}

.language-select-wrapper {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    position: relative;
}

.globe-icon {
    width: 15px;
    height: 15px;
    color: var(--nav-link-muted);
    pointer-events: none;
    transition: color 0.15s var(--nav-ease);
}

.language-select-wrapper:hover .globe-icon {
    color: var(--nav-link-hover);
}

.language-select {
    appearance: none;
    -webkit-appearance: none;
    padding: 0.4rem 1.75rem 0.4rem 0.5rem;
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--nav-link-muted);
    background: transparent;
    border: 1px solid var(--nav-border);
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.15s var(--nav-ease),
                color 0.15s var(--nav-ease),
                background 0.15s var(--nav-ease);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 10px;
}

.language-select:hover {
    border-color: rgba(0, 0, 0, 0.15);
    color: var(--nav-link-hover);
    background-color: rgba(0, 0, 0, 0.02);
}

.language-select:focus {
    outline: none;
    border-color: var(--nav-accent-primary);
    box-shadow: 0 0 0 3px var(--nav-accent-primary-light);
}

/* ===== Mobile Navigation Toggle ===== */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0.75rem;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.15s var(--nav-ease);
}

.nav-toggle:hover {
    background: rgba(0, 0, 0, 0.04);
}

.hamburger {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--nav-link-color);
    position: relative;
    transition: all 0.25s var(--nav-ease);
    border-radius: 2px;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--nav-link-color);
    left: 0;
    border-radius: 2px;
    transition: all 0.25s var(--nav-ease);
}

.hamburger::before {
    top: -6px;
}

.hamburger::after {
    top: 6px;
}

/* Hamburger animation when menu is open */
.nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ===== Mobile Styles ===== */
@media (max-width: 1024px) {
    .navbar .container {
        height: 60px;
    }

    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: calc(var(--z-index-sticky, 1020) + 10);
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        width: min(320px, 85vw);
        height: 100vh;
        height: 100dvh;
        background: var(--nav-bg-solid);
        flex-direction: column;
        align-items: stretch;
        padding: 5rem 1.25rem 2rem;
        gap: 0.25rem;
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
        transform: translateX(100%);
        transition: transform 0.35s var(--nav-ease-out);
        overflow-y: auto;
        z-index: calc(var(--z-index-sticky, 1020) + 5);
    }

    .nav-menu > li {
        height: auto;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    /* Mobile overlay */
    .nav-menu::before {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        backdrop-filter: blur(2px);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s var(--nav-ease);
        z-index: -1;
        left: -100vw;
        width: 100vw;
    }

    .nav-menu.active::before {
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        padding: 0.875rem 1rem;
        font-size: 1rem;
        border-radius: 8px;
    }

    .nav-link--primary {
        margin-top: 0.75rem;
        text-align: center;
        justify-content: center;
        padding: 0.875rem 1rem;
    }

    /* Mobile Dropdown */
    .nav-dropdown {
        width: 100%;
    }

    .nav-dropdown-toggle {
        width: 100%;
        justify-content: space-between;
        padding: 0.875rem 1rem;
        font-size: 1rem;
    }

    .nav-dropdown-menu {
        position: static;
        transform: none;
        width: 100%;
        border: none;
        box-shadow: none;
        border-radius: 8px;
        padding: 0;
        padding-left: 0.5rem;
        max-height: 0;
        overflow: hidden;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transition: max-height 0.3s var(--nav-ease),
                    padding 0.3s var(--nav-ease);
    }

    .nav-dropdown-toggle[aria-expanded="true"] + .nav-dropdown-menu {
        max-height: 500px;
        padding: 0.5rem 0 0.5rem 0.5rem;
    }

    .nav-dropdown-menu li a {
        padding: 0.75rem 1rem;
    }

    /* Mobile Language Select */
    .nav-item.language-menu {
        margin: 0.75rem 0 0;
        padding-top: 0.75rem;
        border-top: 1px solid var(--nav-border);
    }

    .language-select-wrapper {
        width: 100%;
    }

    .language-select {
        width: 100%;
        padding: 0.75rem 2.25rem 0.75rem 0.875rem;
        font-size: 0.9375rem;
        background-color: rgba(0, 0, 0, 0.02);
    }
}

/* ===== Focus States ===== */
.nav-link:focus-visible,
.nav-dropdown-toggle:focus-visible {
    outline: 2px solid var(--nav-accent-primary);
    outline-offset: 2px;
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--nav-accent-primary);
    outline-offset: 2px;
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    .nav-link,
    .nav-dropdown-toggle,
    .nav-dropdown-menu,
    .hamburger,
    .hamburger::before,
    .hamburger::after,
    .logo,
    .logo-icon,
    .nav-menu,
    .header,
    .language-select,
    .nav-link--primary {
        transition: none !important;
    }
}

/* ===== Print ===== */
@media print {
    .header {
        position: static;
        box-shadow: none;
        border-bottom: 1px solid #ccc;
    }

    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: flex !important;
        transform: none !important;
    }
}

/* ===== Scroll Detection (JS Hook) ===== */
@supports (animation-timeline: scroll()) {
    .header {
        animation: navbar-scroll linear;
        animation-timeline: scroll();
        animation-range: 0px 100px;
    }

    @keyframes navbar-scroll {
        to {
            --nav-bg: rgba(255, 255, 255, 0.98);
            box-shadow: var(--nav-shadow-scrolled);
        }
    }
}