/**
 * Site Header Styles
 * Fixed header with logo, navigation, and user controls
 */

/* ============================================
   SITE HEADER
   ============================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 9999;
    background: rgba(var(--color-bg-card-rgb, 26, 31, 58), 0.95);
    backdrop-filter: blur(30px) saturate(180%);
    border-bottom: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.8);
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(var(--color-primary-rgb, 139, 127, 255), 0.05);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

/* ============================================
   SITE LOGO
   ============================================ */

.site-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary, #f8f9fa);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.site-logo:hover {
    color: var(--color-primary, #8b7fff);
    transform: translateY(-1px);
}

/* ============================================
   MAIN NAVIGATION
   ============================================ */

.main-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    justify-content: center;
}

.nav-link {
    color: var(--color-text-secondary, #adb5bd);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary, #8b7fff);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--color-text-primary, #f8f9fa);
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.1);
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link.active {
    color: var(--color-primary, #8b7fff);
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.15);
}

.nav-link.active::after {
    width: 80%;
}

/* ============================================
   HEADER ACTIONS (Right side)
   ============================================ */

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

/* Theme Toggle Button */
.icon-btn {
    background: rgba(var(--color-bg-card-rgb, 26, 31, 58), 0.6);
    border: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.6);
    color: var(--color-text-primary, #f8f9fa);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.icon-btn:hover {
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.2);
    border-color: var(--color-primary, #8b7fff);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb, 139, 127, 255), 0.3);
}

.icon-btn:active {
    transform: translateY(0);
}

/* ============================================
   BREADCRUMB NAVIGATION
   ============================================ */

#breadcrumb-nav {
    background: rgba(var(--color-bg-secondary-rgb, 21, 26, 53), 0.6);
    border-bottom: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.4);
    padding: 0.75rem 2rem;
    display: none; /* Hidden by default, shown by JS when needed */
}

#breadcrumb-nav.visible {
    display: block;
}

.breadcrumb {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
}

.breadcrumb-item {
    color: var(--color-text-secondary, #adb5bd);
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb-item:hover {
    color: var(--color-primary, #8b7fff);
}

.breadcrumb-separator {
    color: var(--color-text-muted, #6c757d);
    user-select: none;
}

.breadcrumb-item.active {
    color: var(--color-text-primary, #f8f9fa);
    font-weight: 500;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .header-container {
        padding: 0.75rem 1.5rem;
        gap: 1.5rem;
    }

    .main-nav {
        gap: 0.25rem;
    }

    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .header-container {
        padding: 0.75rem 1rem;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .site-logo {
        font-size: 1.25rem;
    }

    .main-nav {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        gap: 0.25rem;
        flex-wrap: wrap;
    }

    .nav-link {
        padding: 0.4rem 0.75rem;
        font-size: 0.85rem;
    }

    .header-actions {
        order: 2;
        gap: 0.75rem;
    }

    #breadcrumb-nav {
        padding: 0.5rem 1rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .header-container {
        padding: 0.5rem 1rem;
        gap: 0.75rem;
    }

    .site-logo {
        font-size: 1.1rem;
    }

    .nav-link {
        padding: 0.35rem 0.5rem;
        font-size: 0.8rem;
    }

    .icon-btn {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    .header-actions {
        gap: 0.5rem;
    }

    #breadcrumb-nav {
        font-size: 0.8rem;
        padding: 0.5rem 1rem;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Skip to main content link */
.skip-to-main {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary, #8b7fff);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 0 0 8px 0;
    z-index: 10000;
    transition: top 0.3s ease;
}

.skip-to-main:focus {
    top: 0;
    outline: 2px solid var(--color-accent, #ffd93d);
    outline-offset: 2px;
}

/* Focus visible for keyboard navigation */
.nav-link:focus-visible,
.icon-btn:focus-visible {
    outline: 2px solid var(--color-primary, #8b7fff);
    outline-offset: 2px;
}

/* ============================================
   NAVIGATION DROPDOWNS
   ============================================ */

/* Nav dropdown container */
.nav-dropdown {
    position: relative;
    display: inline-flex;
    align-items: center;
}

/* Dropdown trigger button */
.nav-dropdown-trigger {
    color: var(--color-text-secondary, #adb5bd);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.nav-dropdown-trigger::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    transition: transform 0.3s ease;
    margin-left: 2px;
}

.nav-dropdown:hover .nav-dropdown-trigger::after,
.nav-dropdown.open .nav-dropdown-trigger::after {
    transform: rotate(180deg);
}

.nav-dropdown-trigger:hover,
.nav-dropdown.open .nav-dropdown-trigger {
    color: var(--color-text-primary, #f8f9fa);
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.1);
}

/* Dropdown menu panel */
.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    min-width: 220px;
    max-width: 280px;
    background: rgba(var(--color-bg-card-rgb, 26, 31, 58), 0.98);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.8);
    border-radius: 12px;
    padding: 0.5rem;
    box-shadow:
        0 10px 40px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(var(--color-primary-rgb, 139, 127, 255), 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10000;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2px;
}

/* Dropdown menu for wider categories */
.nav-dropdown-menu.wide {
    min-width: 300px;
    max-width: 400px;
    grid-template-columns: repeat(2, 1fr);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Dropdown menu items */
.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    border-radius: 8px;
    color: var(--color-text-secondary, #adb5bd);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.nav-dropdown-item:hover {
    color: var(--color-text-primary, #f8f9fa);
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.15);
}

.nav-dropdown-item:focus-visible {
    outline: 2px solid var(--color-primary, #8b7fff);
    outline-offset: -2px;
}

.nav-dropdown-item-icon {
    font-size: 1.1rem;
    line-height: 1;
    flex-shrink: 0;
    width: 1.5rem;
    text-align: center;
}

.nav-dropdown-item-text {
    flex: 1;
    min-width: 0;
}

/* Section headers within dropdown */
.nav-dropdown-section {
    padding: 0.5rem 0.85rem 0.25rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted, #6c757d);
    grid-column: 1 / -1;
}

.nav-dropdown-section:not(:first-child) {
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.5);
}

/* Divider */
.nav-dropdown-divider {
    height: 1px;
    background: rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.5);
    margin: 0.35rem 0;
    grid-column: 1 / -1;
}

/* ============================================
   MOBILE NAVIGATION
   ============================================ */

/* Mobile menu toggle button */
.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--color-text-primary, #f8f9fa);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background 0.3s ease;
    z-index: 10001;
}

.mobile-menu-toggle:hover {
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.1);
}

.mobile-menu-toggle svg {
    display: block;
    width: 24px;
    height: 24px;
}

/* Hamburger icon lines */
.hamburger-line {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translateY(6px);
}

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

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translateY(-6px);
}

/* Mobile navigation overlay */
.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 9998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-nav-overlay.visible {
    opacity: 1;
}

/* Mobile navigation panel */
.mobile-nav-panel {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    background: rgba(var(--color-bg-card-rgb, 26, 31, 58), 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.8);
    z-index: 9999;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    overscroll-behavior: contain;
}

.mobile-nav-panel.visible {
    transform: translateX(0);
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.5);
}

.mobile-nav-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary, #f8f9fa);
}

.mobile-nav-close {
    background: transparent;
    border: none;
    color: var(--color-text-secondary, #adb5bd);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-nav-close:hover {
    color: var(--color-text-primary, #f8f9fa);
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.1);
}

.mobile-nav-content {
    padding: 1rem;
}

/* Mobile nav sections */
.mobile-nav-section {
    margin-bottom: 1.5rem;
}

.mobile-nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary, #8b7fff);
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.25rem;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 8px;
    color: var(--color-text-secondary, #adb5bd);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.mobile-nav-link:hover,
.mobile-nav-link:focus {
    color: var(--color-text-primary, #f8f9fa);
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.1);
}

.mobile-nav-link-icon {
    font-size: 1.2rem;
    line-height: 1;
    width: 1.75rem;
    text-align: center;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .site-header {
        border-bottom-width: 2px;
    }

    .nav-link,
    .icon-btn {
        border-width: 2px;
    }

    .nav-dropdown-menu {
        border-width: 2px;
    }

    .nav-dropdown-trigger {
        border: 1px solid transparent;
    }

    .nav-dropdown-trigger:hover,
    .nav-dropdown.open .nav-dropdown-trigger {
        border-color: var(--color-primary, #8b7fff);
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .site-logo,
    .nav-link,
    .icon-btn,
    .nav-link::after,
    .nav-dropdown-trigger::after,
    .nav-dropdown-menu,
    .nav-dropdown-item,
    .mobile-nav-panel,
    .mobile-nav-overlay,
    .hamburger-line {
        transition: none;
    }

    .site-logo:hover,
    .icon-btn:hover {
        transform: none;
    }

    .nav-dropdown:hover .nav-dropdown-trigger::after,
    .nav-dropdown.open .nav-dropdown-trigger::after {
        transform: none;
    }
}

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */
@media (max-width: 1200px) {
    .nav-dropdown-menu {
        min-width: 200px;
    }

    .nav-dropdown-menu.wide {
        min-width: 240px;
        max-width: 320px;
    }

    .nav-dropdown-trigger {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */
@media (max-width: 900px) {
    .main-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-nav-overlay,
    .mobile-nav-panel {
        display: block;
    }

    .header-container {
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .mobile-nav-panel {
        width: 100%;
        border-left: none;
    }

    .mobile-nav-link {
        padding: 0.85rem 0.75rem;
    }
}

/* ============================================
   MINIMALIST HEADER
   Clean, focused design with just logo and theme toggle
   ============================================ */

.header-minimalist {
    justify-content: space-between;
    padding: 0.75rem 2rem;
}

/* Eye Icon in Logo */
.site-logo .eye-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.site-logo:hover .eye-icon {
    transform: scale(1.05);
    filter: drop-shadow(0 0 8px rgba(var(--color-primary-rgb, 139, 127, 255), 0.6));
}

/* Subtle animation on eye icon */
@keyframes eye-glow {
    0%, 100% { filter: drop-shadow(0 0 4px rgba(var(--color-primary-rgb, 139, 127, 255), 0.3)); }
    50% { filter: drop-shadow(0 0 12px rgba(var(--color-primary-rgb, 139, 127, 255), 0.6)); }
}

.site-logo .eye-icon {
    animation: eye-glow 4s ease-in-out infinite;
}

/* Logo text styling */
.site-logo .logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    background: linear-gradient(135deg, var(--color-text-primary, #f8f9fa) 0%, var(--color-primary, #8b7fff) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.site-logo:hover .logo-text {
    background: linear-gradient(135deg, var(--color-primary, #8b7fff) 0%, var(--color-secondary, #ff7eb6) 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

/* Theme Toggle Button - Enhanced */
.theme-toggle-btn {
    position: relative;
    overflow: hidden;
}

.theme-toggle-btn .theme-icon {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.theme-toggle-btn:hover .theme-icon {
    transform: rotate(15deg);
}

/* Theme icon visibility - simplified approach using data attributes */
/* Default: hide sun, show moon (dark theme default) */
.theme-icon-sun {
    display: none;
}

.theme-icon-moon {
    display: block;
}

/* Light themes - show sun, hide moon */
[data-theme="day"] .theme-icon-sun,
[data-theme="light"] .theme-icon-sun,
.theme-light .theme-icon-sun {
    display: block;
}

[data-theme="day"] .theme-icon-moon,
[data-theme="light"] .theme-icon-moon,
.theme-light .theme-icon-moon {
    display: none;
}

/* Minimalist header responsive */
@media (max-width: 768px) {
    .header-minimalist {
        padding: 0.75rem 1rem;
    }

    .site-logo .logo-text {
        font-size: 1.2rem;
    }

    .site-logo .eye-icon {
        width: 32px;
        height: 32px;
    }
}

@media (max-width: 480px) {
    .header-minimalist {
        padding: 0.5rem 0.75rem;
    }

    .site-logo .logo-text {
        font-size: 1rem;
    }

    .site-logo .eye-icon {
        width: 28px;
        height: 28px;
    }

    .theme-toggle-btn {
        width: 40px;
        height: 40px;
    }
}

/* ============================================
   SIGN IN BUTTON
   ============================================ */

.header-sign-in {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--color-primary, #8b7fff) 0%, var(--color-secondary, #ff7eb6) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.header-sign-in:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb, 139, 127, 255), 0.4);
}

.header-sign-in svg {
    fill: white;
}

/* Hide sign-in when user is logged in */
body.authenticated .header-sign-in {
    display: none;
}

/* Show user info when logged in */
body.authenticated .user-info {
    display: flex;
}

/* ============================================
   THEME PICKER CONTAINER & DROPDOWN
   ============================================ */

.theme-picker-container {
    position: relative;
}

.theme-picker-container.has-dropdown .theme-toggle-btn {
    cursor: pointer;
}

/* Theme dropdown */
.theme-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 280px;
    max-width: 320px;
    max-height: 70vh;
    overflow-y: auto;
    background: rgba(var(--color-bg-card-rgb, 26, 31, 58), 0.98);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(var(--color-border-primary-rgb, 42, 47, 74), 0.8);
    border-radius: 12px;
    padding: 0.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    z-index: 10000;
}

.theme-category {
    padding: 0.5rem 0.75rem 0.25rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted, #6c757d);
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-option:hover {
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.15);
}

.theme-option.active {
    background: rgba(var(--color-primary-rgb, 139, 127, 255), 0.2);
    border-left: 3px solid var(--color-primary, #8b7fff);
}

.theme-option-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.theme-option-info {
    flex: 1;
}

.theme-option-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-primary, #f8f9fa);
}

.theme-option-description {
    font-size: 0.75rem;
    color: var(--color-text-secondary, #adb5bd);
    margin-top: 2px;
}

/* Mobile: Hide dropdown */
@media (max-width: 768px) {
    .theme-dropdown {
        display: none;
    }

    .header-sign-in {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
    }

    .header-sign-in svg {
        display: none;
    }
}