/**
 * Header & Navigation Styles
 * Flexbox layout with max-width container for consistent centering
 * Three-tier responsive system: Mobile (<768px), Tablet (768-1023px), Desktop (1024px+)
 */

/* ===== Site Header ===== */
.site-header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-light-gray);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: relative;
    z-index: var(--z-sticky);
}

/* Header content wrapper - max-width centered container */
.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-sm) var(--space-lg);
}

/* ===== Site Branding (Logo Section) ===== */
.site-branding {
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 5px;
    text-decoration: none;
    transition: opacity var(--transition-base);
}

.logo-link:hover {
    opacity: 0.85;
}

.site-logo {
    height: 48px;
    width: auto;
}

.site-title-group {
    display: block;
}

.site-title {
    font-size: var(--font-size-base);
    color: var(--color-navy);
    margin: 0;
    line-height: 1.2;
    font-weight: var(--font-weight-bold);
}

.site-tagline {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.2;
}

/* ===== Mobile Menu Toggle ===== */
.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    border-radius: var(--radius-sm);
    transition: background var(--transition-base);
    flex-shrink: 0;
}

.mobile-menu-toggle:hover {
    background: var(--color-cream);
}

.mobile-menu-toggle:focus-visible {
    outline: 3px solid var(--color-burgundy);
    outline-offset: 2px;
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 24px;
    height: 20px;
}

.hamburger-icon span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--color-navy);
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
}

/* Hamburger to X animation */
.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
}

/* ===== Primary Navigation ===== */
.primary-navigation {
    display: flex;
    align-items: center;
}

/* ===== Navigation Menu ===== */
.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-xs);
}

/* ===== Nav Items ===== */
.nav-item {
    position: relative;
}

/* ===== Nav Links with Visual Affordances ===== */
.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    color: var(--color-navy);
    text-decoration: none;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    background: var(--color-cream);
    border: 1px solid var(--color-light-gray);
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--color-white);
    background: var(--color-navy);
    border-color: var(--color-navy);
}

/* Enhanced focus state for accessibility */
.nav-link:focus-visible {
    outline: 3px solid var(--color-burgundy);
    outline-offset: 2px;
    color: var(--color-white);
    background: var(--color-navy);
    border-color: var(--color-navy);
}

/* Active State */
.nav-link.active {
    color: var(--color-white);
    background: var(--color-burgundy);
    border-color: var(--color-burgundy);
}

/* Chevron icon styles */
.chevron-icon {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

/* Chevron rotation for open dropdowns */
.has-dropdown:hover .chevron-icon,
.has-dropdown.open .chevron-icon,
.has-dropdown:focus-within .chevron-icon {
    transform: rotate(180deg);
}

/* ===== User Navigation ===== */
.nav-link-user {
    gap: var(--space-sm);
}

.user-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-cream);
    color: var(--color-navy);
    border-radius: var(--radius-full);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.user-name {
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-role {
    font-size: var(--font-size-caption);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-secondary);
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-link-user:hover .user-role {
    color: rgba(255, 255, 255, 0.8);
}

/* ===== Donate Button ===== */
.nav-item-donate {
    margin-left: var(--space-md);
}

.nav-link-donate {
    background: var(--color-burgundy);
    color: var(--color-white);
    border-radius: var(--radius-pill);
    padding: var(--space-sm) var(--space-lg);
    /* Removed box-shadow to prevent ghost artifacts */
}

.nav-link-donate::after {
    display: none;
}

.nav-link-donate:hover {
    background: #8f0a00;
    color: var(--color-white);
    transform: scale(1.05);
}

.nav-link-donate:focus-visible {
    outline: 3px solid var(--color-burgundy);
    outline-offset: 2px;
}

.donate-icon {
    flex-shrink: 0;
}

/* ===== Dropdown Menu ===== */
.dropdown-menu {
    list-style: none;
    padding: var(--space-sm);
    margin: 0;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-white);
    border: 2px solid var(--color-navy);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    margin-top: var(--space-xs);
    z-index: var(--z-dropdown);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.dropdown-menu-right {
    left: auto;
    right: 0;
}

/* Show dropdown on hover/focus (desktop) */
.has-dropdown:hover > .dropdown-menu,
.has-dropdown:focus-within > .dropdown-menu,
.has-dropdown.open > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a,
.dropdown-logout {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-navy);
    text-decoration: none;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    width: 100%;
    text-align: left;
    background: var(--color-cream);
    border: none;
    cursor: pointer;
    font-family: inherit;
    margin-bottom: 2px;
}

.dropdown-menu a:hover,
.dropdown-menu a:focus {
    background: var(--color-navy);
    color: var(--color-white);
}

.dropdown-logout {
    color: var(--color-error);
    background: #fef2f2;
}

.dropdown-logout:hover,
.dropdown-logout:focus {
    background: var(--color-error);
    color: var(--color-white);
}

.dropdown-divider {
    height: 1px;
    background: var(--color-light-gray);
    margin: var(--space-xs) 0;
}

/* ===== Role Switching in User Dropdown ===== */
.dropdown-menu-user {
    min-width: 260px;
}

.dropdown-section-header {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-caption);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dropdown-role-item {
    margin: 0;
}

.dropdown-role-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-navy);
    text-decoration: none;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    text-align: left;
    background: var(--color-cream);
    border: none;
    cursor: pointer;
    font-family: inherit;
    margin-bottom: 2px;
}

.dropdown-role-btn:hover {
    background: var(--color-navy);
    color: var(--color-white);
}

.dropdown-role-btn.active {
    background: var(--color-green);
    color: var(--color-white);
}

.dropdown-role-btn.active:hover {
    background: #005902;
}

.role-check-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
}

.role-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.role-badge {
    font-size: var(--font-size-caption);
    padding: 2px 6px;
    background: rgba(109, 8, 0, 0.1);
    color: var(--color-burgundy);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.dropdown-role-btn:hover .role-badge {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}

.dropdown-role-btn.active .role-badge {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}

/* ===== Mobile Navigation Overlay ===== */
.mobile-navigation {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: var(--color-navy);
    overflow-y: auto;
    z-index: var(--z-modal);
    padding: var(--space-4xl) var(--space-lg) var(--space-xl);
}

.mobile-navigation.open {
    display: block;
}

.mobile-nav-content {
    max-width: 400px;
    margin: 0 auto;
}

.mobile-nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.mobile-nav-item {
    position: relative;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    color: var(--color-white);
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.mobile-nav-link:hover,
.mobile-nav-link:focus {
    background: rgba(255, 255, 255, 0.1);
}

.mobile-nav-link.active {
    background: rgba(255, 255, 255, 0.15);
}

.mobile-nav-link:focus-visible {
    outline: 2px solid var(--color-white);
    outline-offset: 2px;
}

.mobile-nav-link-login {
    color: var(--color-cream);
    font-weight: var(--font-weight-bold);
}

.mobile-nav-link-user {
    gap: var(--space-md);
}

.user-avatar-mobile {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-bold);
}

.mobile-nav-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.2);
    margin: var(--space-md) 0;
}

/* ===== Mobile Dropdown Trigger ===== */
.mobile-dropdown-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-md);
    color: var(--color-white);
    background: none;
    border: none;
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
}

.mobile-dropdown-trigger:hover,
.mobile-dropdown-trigger:focus {
    background: rgba(255, 255, 255, 0.1);
}

.mobile-dropdown-trigger:focus-visible {
    outline: 2px solid var(--color-white);
    outline-offset: 2px;
}

.mobile-dropdown-trigger .chevron-icon {
    width: 20px;
    height: 20px;
    stroke: var(--color-white);
}

.mobile-nav-item.has-dropdown.open .mobile-dropdown-trigger .chevron-icon {
    transform: rotate(180deg);
}

/* ===== Mobile Submenu ===== */
.mobile-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
    padding-left: var(--space-lg);
}

.mobile-nav-item.has-dropdown.open .mobile-submenu {
    max-height: 300px;
}

.mobile-submenu li {
    margin: 0;
}

.mobile-submenu a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: var(--font-size-base);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.mobile-submenu a:hover,
.mobile-submenu a:focus {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    padding-left: var(--space-lg);
}

.mobile-submenu a:focus-visible {
    outline: 2px solid var(--color-white);
    outline-offset: 2px;
}

/* ===== Mobile Role Switching ===== */
.mobile-role-submenu {
    padding-left: var(--space-md);
}

.mobile-role-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    color: rgba(255, 255, 255, 0.85);
    background: none;
    border: none;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    text-align: left;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    font-family: inherit;
}

.mobile-role-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    padding-left: var(--space-lg);
}

.mobile-role-btn.active {
    color: var(--color-green);
    font-weight: var(--font-weight-semibold);
}

.mobile-role-btn.active svg {
    color: var(--color-green);
}

.mobile-role-btn svg {
    flex-shrink: 0;
}

/* ===== Mobile Donate Button ===== */
.mobile-nav-item-donate {
    margin-top: var(--space-lg);
}

.mobile-donate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-burgundy);
    color: var(--color-white);
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-pill);
    transition: all var(--transition-base);
}

.mobile-donate-btn:hover,
.mobile-donate-btn:focus {
    background: #8f0a00;
    transform: scale(1.02);
}

.mobile-donate-btn:focus-visible {
    outline: 2px solid var(--color-white);
    outline-offset: 2px;
}

/* ===== Mobile Logout Button ===== */
.mobile-logout-btn {
    display: block;
    width: 100%;
    padding: var(--space-md);
    color: #fca5a5;
    background: none;
    border: none;
    font-size: var(--font-size-large);
    font-weight: var(--font-weight-semibold);
    text-align: left;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    font-family: inherit;
}

.mobile-logout-btn:hover,
.mobile-logout-btn:focus {
    background: rgba(255, 255, 255, 0.1);
    color: #fecaca;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* ----- Mobile: 0 - 767px ----- */
@media (max-width: 767px) {
    .header-content {
        justify-content: space-between;
        padding: var(--space-sm) var(--space-md);
        gap: var(--space-md);
    }

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

    .primary-navigation {
        display: none;
    }

    .site-logo {
        height: 40px;
    }

    .site-title {
        font-size: var(--font-size-small);
    }

    .site-tagline {
        font-size: var(--font-size-caption);
    }
}

/* ----- Tablet: 768px - 1023px ----- */
@media (min-width: 768px) and (max-width: 1023px) {
    .header-content {
        padding: var(--space-xs) var(--space-md);
        gap: var(--space-md);
    }

    /* Condensed logo */
    .site-logo {
        height: 36px;
    }

    /* Hide tagline to save space */
    .site-tagline {
        display: none;
    }

    .site-title {
        font-size: var(--font-size-small);
    }

    /* Condensed nav spacing */
    .nav-menu {
        gap: 2px;
    }

    .nav-link {
        font-size: var(--font-size-caption);
        padding: var(--space-xs) var(--space-sm);
    }

    /* Smaller donate button on tablet */
    .nav-link-donate {
        padding: var(--space-xs) var(--space-md);
        font-size: var(--font-size-caption);
    }

    .nav-item-donate {
        margin-left: var(--space-sm);
    }

    /* Tablet dropdowns: click to open only */
    .has-dropdown:hover > .dropdown-menu {
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
    }

    .has-dropdown.open > .dropdown-menu,
    .has-dropdown:focus-within > .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    /* User name and role hidden on tablet */
    .user-name,
    .user-role {
        display: none;
    }

    .user-info {
        display: none;
    }

    .user-avatar {
        width: 28px;
        height: 28px;
        font-size: var(--font-size-caption);
    }
}

/* ----- Desktop: 1024px+ ----- */
@media (min-width: 1024px) {
    .header-content {
        padding: var(--space-sm) var(--space-xl);
        gap: var(--space-xl);
    }

    .site-logo {
        height: 48px;
    }

    .site-title {
        font-size: var(--font-size-h4);
    }

    .logo-link {
        gap: 5px;
    }

    .nav-menu {
        gap: var(--space-xs);
    }

    .nav-link {
        font-size: var(--font-size-small);
        padding: var(--space-sm) var(--space-md);
    }

    /* Desktop dropdowns work on hover */
    .has-dropdown:hover > .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-link-donate {
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--font-size-small);
    }

    .nav-item-donate {
        margin-left: var(--space-md);
    }
}

/* ----- Large Desktop: 1440px+ ----- */
@media (min-width: 1440px) {
    .header-content {
        gap: var(--space-2xl);
    }

    .site-logo {
        height: 56px;
    }

    .site-title {
        font-size: var(--font-size-h3);
    }

    .nav-menu {
        gap: var(--space-sm);
    }

    .nav-link {
        font-size: var(--font-size-base);
        padding: var(--space-sm) var(--space-lg);
    }

    .nav-link-donate {
        padding: var(--space-sm) var(--space-xl);
    }

    .dropdown-menu {
        min-width: 220px;
    }

    .dropdown-menu a,
    .dropdown-logout {
        font-size: var(--font-size-base);
    }
}

/* ===== Body Scroll Lock ===== */
body.mobile-menu-open {
    overflow: hidden;
}

/* ===== Skip Link ===== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-navy);
    color: var(--color-white);
    z-index: 100;
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: 0;
}