/**
 * Header CSS - Navigation and header styles
 */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #1a1f3a;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    height: var(--header-height);
}

.header.scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
}

.header-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
}

.logo-image {
    height: 40px;
    width: auto;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-gray-700);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    transition: color var(--transition-base);
    white-space: nowrap;
    /* Mobile: Ensure minimum touch target size */
    min-height: 44px;
    display: flex;
    align-items: center;
    /* Remove tap highlight */
    -webkit-tap-highlight-color: transparent;
}

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

.nav-link.active {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

/* Auth Buttons */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Mobile Auth Toggle */
.mobile-auth-toggle {
    display: none;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: none;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
}

.mobile-auth-toggle svg {
    width: 18px;
    height: 18px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    /* Mobile: Ensure minimum touch target size */
    min-height: 44px;
    min-width: 44px;
    justify-content: center;
    align-items: center;
    /* Remove tap highlight */
    -webkit-tap-highlight-color: transparent;
    /* Prevent text selection */
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-gray-700);
    transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Styles */
@media (max-width: 1024px) {
    .nav-menu, .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: #1a1f3a;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
        display: none;
        z-index: 999;
    }

    .nav-menu.active, .nav-links.active {
        display: flex;
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
        /* Safari iOS: Enable momentum scrolling */
        -webkit-overflow-scrolling: touch;
        /* Prevent horizontal scroll */
        overflow-x: hidden;
    }

    .nav-link, .nav-menu a, .nav-links a {
        padding: var(--spacing-md) var(--spacing-lg);
        border-bottom: 1px solid var(--color-gray-200);
        display: block;
        width: 100%;
    }

    .nav-menu li, .nav-links li {
        width: 100%;
    }

    .auth-buttons {
        display: none;
        flex-direction: column;
        padding: var(--spacing-md);
        background: var(--color-gray-50);
        border-top: 1px solid var(--color-gray-200);
    }

    .mobile-auth-toggle {
        display: flex;
    }

    .mobile-auth-toggle.active + .auth-buttons,
    .auth-buttons.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .profile-dropdown {
        margin-left: auto;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-md);
    }

    .logo {
        font-size: var(--font-size-lg);
    }

    .logo-image {
        height: 32px;
    }
}