/* =============================================================================
   Navigation
   ============================================================================= */

/* Main Navigation Container */
.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-sm) 0;
    position: relative;
}

/* Logo - Left Side */
.main-nav .nav-logo {
    margin: 0;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.main-nav .nav-logo a {
    display: inline-flex;
    align-items: center;
}

.main-nav .nav-logo img {
    width: 100px;
    height: auto;
    display: block;
    border: none;
    transition: opacity 0.2s ease;
}

.main-nav .nav-logo img:hover {
    opacity: 0.8;
}

/* Navigation Menu - Right Side */
.main-nav .nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Navigation Links */
.main-nav .nav-menu a {
    color: var(--text-secondary);
    font-size: var(--font-size-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--spacing-xs) var(--spacing-sm);
    position: relative;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.main-nav .nav-menu a:hover {
    color: var(--text-primary);
}

.main-nav .nav-menu a.active {
    color: var(--text-primary);
}

.main-nav .nav-menu a.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    height: 2px;
    background-color: var(--accent-color);
    border-radius: 1px;
}

/* Hamburger Menu Button */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    padding: var(--spacing-xs);
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
    position: relative;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
    position: absolute;
}

.nav-toggle span:nth-child(1) {
    transform: translateY(-7px);
}

.nav-toggle span:nth-child(2) {
    transform: translateY(0);
}

.nav-toggle span:nth-child(3) {
    transform: translateY(7px);
}

/* Hamburger Animation - Open State */
.nav-toggle.active span:nth-child(1) {
    transform: translateY(0) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(0) rotate(-45deg);
}

/* Mobile Navigation Overlay */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-overlay.active {
    opacity: 1;
}

/* =============================================================================
   Mobile Styles
   ============================================================================= */
@media (max-width: 768px) {
    /* Show Hamburger Button */
    .nav-toggle {
        display: flex;
    }

    /* Mobile Menu Container */
    .main-nav .nav-menu {
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: calc(var(--spacing-xl) * 3) var(--spacing-xl) var(--spacing-xl);
        background-color: var(--bg-primary);
        border-left: 1px solid var(--border-color);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
        z-index: 999;
        transition: right 0.3s ease;
        gap: 0;
        overflow-y: auto;
    }

    .main-nav .nav-menu.active {
        right: 0;
    }

    /* Mobile Menu Links */
    .main-nav .nav-menu a {
        width: 100%;
        padding: var(--spacing-md) 0;
        font-size: var(--font-size-lg);
        border-bottom: 1px solid var(--border-color);
    }

    .main-nav .nav-menu a:first-child {
        border-top: 1px solid var(--border-color);
    }

    .main-nav .nav-menu a.active::after {
        bottom: var(--spacing-sm);
        left: 0;
        right: auto;
        width: 3px;
        height: calc(100% - var(--spacing-md) * 2);
        border-radius: 0 2px 2px 0;
    }

    /* Show Overlay */
    .nav-overlay {
        display: block;
        pointer-events: none;
    }

    .nav-overlay.active {
        pointer-events: auto;
    }

    /* Prevent body scroll when menu is open */
    body.nav-open {
        overflow: hidden;
    }
}

/* =============================================================================
   Tablet Adjustments
   ============================================================================= */
@media (max-width: 1024px) and (min-width: 769px) {
    .main-nav .nav-menu {
        gap: var(--spacing-md);
    }

    .main-nav .nav-menu a {
        font-size: var(--font-size-sm);
        padding: var(--spacing-xs) var(--spacing-xs);
    }

    .main-nav .nav-menu a.active::after {
        left: var(--spacing-xs);
        right: var(--spacing-xs);
    }
}

/* =============================================================================
   Accessibility
   ============================================================================= */
.nav-toggle:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.main-nav .nav-menu a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}