/* Navigation Styles */

.sidebar {
    width: 280px;
    min-width: 280px;
    background-color: transparent;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    overflow-y: auto;
    overflow-x: visible;
    opacity: 0;
}

/* Sidebar animation now handled by GSAP in app.js */

.sidebar-header {
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: transparent;
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo-container {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.logo {
    font-size: calc(1.5 * var(--font-size-lg));
    font-weight: 900; /* Black weight for maximum impact */
    color: var(--color-text-primary);
    letter-spacing: -0.03em;
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1.2;
    text-transform: uppercase;
}

.logo:hover {
    color: var(--color-accent);
}

.logo-author {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    font-weight: var(--font-weight-regular);
    margin: 0;
}


.nav-content {
    flex: 1;
    padding: var(--spacing-md) 0;
    padding-bottom: var(--spacing-xl);
}

.nav-group {
    margin-bottom: calc(var(--spacing-lg) + var(--spacing-xs));
    opacity: 0;
    transform: translateY(10px);
}

.nav-group.animate-in {
    animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-group-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
    padding: var(--spacing-sm) calc(var(--spacing-lg) + var(--spacing-xs));
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.nav-group-title:hover {
    color: var(--color-accent);
}

.nav-group-title > i:first-child {
    font-size: 16px;
    opacity: 0.7;
}

.nav-group-chevron {
    margin-left: auto;
    font-size: 14px;
    transition: transform var(--transition-fast);
}

.nav-group.expanded .nav-group-chevron {
    transform: rotate(180deg);
}

.nav-items {
    list-style: none;
}

.nav-group > .nav-items {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-group.expanded > .nav-items {
    max-height: 2000px;
    padding-top: 4px;
    padding-bottom: 4px;
}

.nav-item:last-child {
    margin-bottom: 0;
}

.nav-item {
    position: relative;
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 10px 16px;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-regular);
    cursor: pointer;
    transition: color var(--transition-fast);
    position: relative;
    border-radius: 50px;
    overflow: visible;
    width: auto;
    max-width: 100%;
    margin-bottom: 2px;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    right: 100%;
    height: 100%;
    background-color: var(--color-bg-tertiary);
    opacity: 0.5;
    transition: right 0.3s ease-in;
    z-index: -1;
    border-radius: 50px;
}

/* Hover state controlled by JavaScript */
.nav-link.nav-hovering {
    color: var(--color-text-primary);
}

.nav-link.nav-hovering::before {
    right: 0;
    transition: right 0.3s ease-out;
}

/* Click expansion */
.nav-link.nav-expanding::before {
    right: 0;
    transition: right 0.3s ease-out;
}

.nav-link {
    transition: color var(--transition-base), font-weight 0.1s ease;
}

.nav-link::before {
    transition: right var(--transition-base), left 0.3s ease, background-color 0.3s ease, border 0.3s ease, box-shadow 0.3s ease;
}

.nav-link.active {
    color: var(--color-accent) !important;
    font-weight: var(--font-weight-semibold);
    border: 2px solid var(--color-accent);
}

.nav-link.active::before {
    right: 0;
    background-color: var(--color-bg-tertiary);
}

.nav-link.active .nav-link-icon,
.nav-link.active .nav-link-text {
    color: var(--color-accent) !important;
    transition: color 0.3s ease;
}

/* Mobile refinements - ensure full coverage */
@media (max-width: 768px) {
    .nav-link.active {
        color: var(--color-accent) !important;
        font-weight: var(--font-weight-semibold);
        border: 2px solid var(--color-accent);
    }
    
    .nav-link.active::before {
        right: 0;
        background-color: var(--color-bg-tertiary);
    }

    .nav-link.active .nav-link-icon,
    .nav-link.active .nav-link-text {
        color: var(--color-accent) !important;
    }
}

.nav-link-icon {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.nav-link-text {
    flex: 1;
    position: relative;
    z-index: 1;
}

/* Collapsible Navigation Items */
.nav-item.has-children > .nav-link::after {
    content: '';
    width: 6px;
    height: 6px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
    transition: transform var(--transition-fast);
    margin-left: auto;
    position: relative;
    z-index: 1;
}

.nav-item.has-children.expanded > .nav-link::after {
    transform: rotate(-135deg);
}

.nav-children {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.nav-item.expanded > .nav-children {
    max-height: 1000px;
}

.nav-group > .nav-items .nav-item {
    padding-left: 20px; /* Indent the entire item */
    padding-right: var(--spacing-sm); /* Balanced right padding */
}

.nav-group > .nav-items .nav-link {
    padding: 10px 16px; /* Balanced padding */
    font-size: var(--font-size-sm);
}

.nav-children .nav-item {
    padding-left: 36px; /* Additional indent for nested items */
    padding-right: var(--spacing-sm);
    margin-bottom: 4px;
}

.nav-children .nav-link {
    padding: 10px 16px; /* Balanced padding */
    font-size: var(--font-size-sm);
}

/* Main Content Area */
.main-content {
    flex: 1;
    overflow: hidden;
    background-color: var(--color-bg-primary);
    position: fixed;
    top: 0;
    left: 0;
    opacity: 0; /* Start hidden - GSAP will animate */
    width: 100vw;
    height: 100vh;
    z-index: 1;
}

/* Hero Container - fullscreen without padding */
.hero-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    overflow: hidden;
    z-index: 1;
}

/* Theme Controls Container */
.theme-controls {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 200;
}

/* Theme Toggle & Mobile Preview Toggle */
.theme-toggle,
.mobile-preview-toggle {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--color-bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.theme-toggle:hover,
.mobile-preview-toggle:hover {
    background: var(--color-bg-tertiary);
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

.theme-toggle i,
.mobile-preview-toggle i {
    font-size: 22px;
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* Active state for mobile preview toggle */
.mobile-preview-toggle.active {
    background: var(--color-accent);
}

.mobile-preview-toggle.active i {
    color: white;
}

.mobile-preview-toggle.active:hover {
    background: var(--color-accent);
    opacity: 0.9;
}

.content-header {
    display: none;
    padding: var(--spacing-3xl) var(--spacing-3xl) var(--spacing-xl);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border-light);
}

.page-title {
    font-size: 100px;
    margin-bottom: var(--spacing-sm);
    min-height: 44px;
    white-space: nowrap;
}

/* Hide line break on desktop for single-line title */
@media (min-width: 769px) {
    .page-title br {
        display: none;
    }
}

.page-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    min-height: 24px;
}

/* Disable transitions during typing to prevent iOS rendering issues */
.page-title.typing,
.page-description.typing {
    transition: none !important;
}

/* Safari-specific: Make color transitions instant for header text */
@supports (-webkit-hyphens:none) {
    .page-title,
    .page-description {
        transition: color 0s, background-color var(--transition-theme), border-color var(--transition-theme), fill var(--transition-theme), stroke var(--transition-theme) !important;
    }
}

.content-body {
    padding: var(--spacing-3xl) var(--spacing-3xl);
    padding-top: 0;
    overflow-x: clip;
}

/* Mobile Menu Toggle Button (Hamburger) */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    padding: 0;
    background: var(--color-bg-tertiary);
    border-radius: 50%;
    cursor: pointer;
    transition: left var(--transition-base), top var(--transition-base), background var(--transition-fast), box-shadow var(--transition-fast);
    border: none;
    box-shadow: var(--shadow-sm);
    z-index: 101;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle:hover {
    background: var(--color-bg-tertiary);
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

/* Mobile Navigation Hamburger - Specific styles to avoid conflicts */
.mobile-menu-toggle .hamburger-box {
    width: 16px;
    height: 12px;
    display: inline-block;
    position: relative;
}

.mobile-menu-toggle .hamburger-inner {
    display: block;
    top: 50%;
    margin-top: -0.75px;
}

.mobile-menu-toggle .hamburger-inner,
.mobile-menu-toggle .hamburger-inner::before,
.mobile-menu-toggle .hamburger-inner::after {
    width: 16px;
    height: 1.5px;
    background-color: var(--color-text-primary);
    border-radius: 1px;
    position: absolute;
    transition-property: transform, background-color;
    transition-duration: 0.15s, var(--transition-fast);
    transition-timing-function: ease;
}

.mobile-menu-toggle .hamburger-inner::before,
.mobile-menu-toggle .hamburger-inner::after {
    content: "";
    display: block;
}

.mobile-menu-toggle .hamburger-inner::before {
    top: -5px;
}

.mobile-menu-toggle .hamburger-inner::after {
    bottom: -5px;
}

/* Mobile Navigation Spin Animation */
.mobile-menu-toggle.hamburger-spin .hamburger-inner {
    transition-duration: 0.22s;
    transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
}

.mobile-menu-toggle.hamburger-spin .hamburger-inner::before {
    transition: top 0.1s 0.25s ease-in, opacity 0.1s ease-in;
}

.mobile-menu-toggle.hamburger-spin .hamburger-inner::after {
    transition: bottom 0.1s 0.25s ease-in, transform 0.22s cubic-bezier(0.55, 0.055, 0.675, 0.19);
}

.mobile-menu-toggle.hamburger-spin.active .hamburger-inner {
    transform: rotate(225deg);
    transition-delay: 0.12s;
    transition-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
}

.mobile-menu-toggle.hamburger-spin.active .hamburger-inner::before {
    top: 0;
    opacity: 0;
    transition: top 0.1s ease-out, opacity 0.1s 0.12s ease-out;
}

.mobile-menu-toggle.hamburger-spin.active .hamburger-inner::after {
    bottom: 0;
    transform: rotate(-90deg);
    transition: bottom 0.1s ease-out, transform 0.22s 0.12s cubic-bezier(0.215, 0.61, 0.355, 1);
}

/* Active state styling - same background as default */
.mobile-menu-toggle.active {
    background: var(--color-bg-tertiary);
}

.mobile-menu-toggle.active:hover {
    background: var(--color-bg-tertiary);
    transform: scale(1.05);
}

/* Mobile Overlay */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 98;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

/* Desktop - Ensure mobile elements are hidden */
@media (min-width: 769px) {
    .mobile-menu-toggle {
        display: none !important;
    }
    
    .mobile-overlay {
        display: none !important;
    }
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
    
    /* When menu is active, button moves inside top right of sidebar */
    .mobile-menu-toggle.active {
        left: calc(80vw - 44px - var(--spacing-lg));
    }

    .mobile-overlay {
        display: block;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
        will-change: opacity;
    }

    .mobile-overlay.active {
        opacity: 1;
        pointer-events: auto;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: 80vw;
        opacity: 1 !important;
        transform: translateX(calc(-100% - 5px));
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 99;
        will-change: transform;
        background-color: rgba(245, 245, 247, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }
    
    [data-theme="dark"] .sidebar {
        background-color: rgba(0, 0, 0, 0.95);
    }

    .sidebar.mobile-open {
        transform: translateX(0) !important;
        box-shadow: var(--shadow-lg);
    }

    .sidebar.active {
        transform: translateX(0) !important;
    }

    .main-content {
        width: 100%;
        margin-left: 0;
        opacity: 1;
        transform: none;
        animation: none;
    }
    
    .nav-group {
        opacity: 1;
        transform: none;
        animation: none;
    }
    
    /* Ensure nav items are always visible on mobile */
    .nav-group > .nav-items {
        max-height: 2000px !important;
    }

    .theme-controls {
        top: var(--spacing-lg);
        right: var(--spacing-lg);
    }

    .theme-toggle,
    .mobile-preview-toggle {
        width: 44px;
        height: 44px;
    }

    .theme-toggle i,
    .mobile-preview-toggle i {
        font-size: 22px;
    }

    .content-body {
        padding: var(--spacing-md);
        padding-top: calc(44px + var(--spacing-md)); /* Menu button height + spacing */
    }
    
    .page-top-spacer {
        height: 20px !important; /* Reduced from 100px for mobile */
    }

    .logo {
        font-size: calc(1.5 * var(--font-size-lg));
    }
    
    /* Show line break on mobile for better readability */
    .page-title {
        font-size: var(--font-size-2xl);
    }
    
    .page-title br {
        display: block;
    }
}

/* Smaller mobile devices */
@media (max-width: 480px) {
    .sidebar {
        width: 85vw;
        max-width: none;
    }
    
    .mobile-menu-toggle.active {
        left: calc(85vw - 44px - var(--spacing-lg));
    }

    .logo {
        font-size: calc(1.5 * var(--font-size-base));
    }

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