/* Future-forward design system with artistic elements */
:root {
    /* Light mode defaults */
    --bg: #ffffff;
    --text: #1a1a1a;
    --text-muted: #666666;
    --accent: #1a1a1a;
    --border: #e0e0e0;
    --hover: #f5f5f5;
    --glass: rgba(255, 255, 255, 0.8);
    --shadow: rgba(0, 0, 0, 0.1);
    --gradient: linear-gradient(135deg, #f8f8f8 0%, #ffffff 100%);
    
    /* Common values */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
}

[data-theme="dark"] {
    --bg: #0a0a0a;
    --text: #f5f5f5;
    --text-muted: #9a9a9a;
    --accent: #ffffff;
    --border: #1a1a1a;
    --hover: #111111;
    --glass: rgba(0, 0, 0, 0.3);
    --shadow: rgba(255, 255, 255, 0.02);
    --gradient: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    overflow-x: hidden;
    position: relative;
}

/* Artistic background elements */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(120, 219, 226, 0.03) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

/* Page loader */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.8s cubic-bezier(0.23, 1, 0.32, 1), visibility 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
    transform: scale(1);
    animation: pulse 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.loader-text {
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

/* Navigation - updated for mobile */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.5rem 2rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    background: var(--glass);
}

.nav.scrolled {
    background: var(--bg);
    border-bottom-color: var(--border);
    box-shadow: 0 1px 20px var(--shadow);
}

/* Light mode specific nav styles */
html:not([data-theme="dark"]) .nav {
    background: rgba(255, 255, 255, 0.8);
}

html:not([data-theme="dark"]) .nav.scrolled {
    background: var(--bg);
    border-bottom-color: var(--border);
}

/* Dark mode specific nav styles */
[data-theme="dark"] .nav {
    background: rgba(10, 10, 10, 0.8);
}

[data-theme="dark"] .nav.scrolled {
    background: var(--bg);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 400;
    font-size: 1rem;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: -0.01em;
    opacity: 0;
    transform: translateY(-20px);
    animation: none;
}

.logo.animate { 
    animation: slideDown 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
    transform-origin: center;
}
.nav-link:nth-child(1).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s forwards;
}
.nav-link:nth-child(2).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s forwards;
}
.nav-link:nth-child(3).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.5s forwards;
}
.nav-link:nth-child(4).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.6s forwards;
}
.settings-btn.animate { 
    animation: fadeScale 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.8s forwards;
}
.hamburger.animate { 
    animation: fadeScale 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.8s forwards;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color 0.3s ease;
    opacity: 0;
    transform: translateY(-20px);
    position: relative;
    animation: none;
}

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

.logo.animate { 
    animation: slideDown 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
    transform-origin: center;
}
.nav-link:nth-child(1).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s forwards;
}
.nav-link:nth-child(2).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s forwards;
}
.nav-link:nth-child(3).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.5s forwards;
}
.nav-link:nth-child(4).animate { 
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.6s forwards;
}
.settings-btn.animate { 
    animation: fadeScale 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.8s forwards;
}
.hamburger.animate { 
    animation: fadeScale 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.8s forwards;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

.nav-link:hover::after {
    width: 100%;
}

.settings-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(-20px);
    animation: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.settings-btn.animate {
    animation: slideDown 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.7s forwards;
}

.settings-btn:hover {
    background: var(--hover);
    transform: translateY(-1px);
}

/* Mobile hamburger menu with matching desktop animation */
.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    display: none;
    height: 24px;
    margin-left: 1rem;
    opacity: 0;
    padding: 0;
    position: relative;
    transform: translateY(-20px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    width: 24px;
    z-index: 99;
    will-change: transform, opacity;
    transform-origin: center;
}

@media (max-width: 968px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: block;
        opacity: 1;
        transform: translateX(0);
    }
}

.hamburger.animate {
    animation: fadeScale 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) 0.8s forwards;
    opacity: 0;
    transform: scale(0.9) translateY(-20px);
}

.hamburger span {
    background-color: var(--text);
    border-radius: 2px;
    display: block;
    height: 2px;
    left: 0;
    position: absolute;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    width: 24px;
}

.hamburger span:nth-child(1) {
    top: 4px;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.hamburger span:nth-child(2) {
    top: 11px;
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.hamburger span:nth-child(3) {
    top: 18px;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Hamburger animation states with smooth transitions */
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
    transition-delay: 0.1s;
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
    transition-delay: 0s;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
    transition-delay: 0.1s;
}

/* Mobile menu with smooth transitions */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--bg);
    z-index: 98;
    transform: translateX(-100%);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-right: 1px solid var(--border);
}

/* Mobile menu animations with consistent slide-in effects */
.mobile-menu .nav-link {
    opacity: 0;
    transform: translateX(-50px);
    animation: none;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mobile-menu.active .nav-link {
    opacity: 1;
    transform: translateX(0);
}

.mobile-menu.active .nav-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.active .nav-link:nth-child(2) { transition-delay: 0.2s; }
.mobile-menu.active .nav-link:nth-child(3) { transition-delay: 0.3s; }
.mobile-menu.active .nav-link:nth-child(4) { transition-delay: 0.4s; }

.mobile-menu .mobile-settings-btn {
    opacity: 0;
    transform: translateX(-20px);
    animation: none;
}

.mobile-menu.active .mobile-settings-btn {
    animation: mobileSlideIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.55s forwards;
}

.mobile-menu.active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.1);
}

.mobile-menu .nav-link {
    font-size: 1.8rem;
    font-weight: 300;
    opacity: 0;
    transform: translateY(20px);
    animation: none;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu.active .nav-link {
    animation: mobileSlideIn 0.6s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

.mobile-menu .nav-link {
    opacity: 0;
    transform: translateX(-20px);
    animation: mobileSlideIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.mobile-menu.active .nav-link:nth-child(1) { 
    transition-delay: 0.1s;
    opacity: 1;
    transform: translateX(0);
}
.mobile-menu.active .nav-link:nth-child(2) { 
    transition-delay: 0.2s;
    opacity: 1;
    transform: translateX(0);
}
.mobile-menu.active .nav-link:nth-child(3) { 
    transition-delay: 0.3s;
    opacity: 1;
    transform: translateX(0);
}
.mobile-menu.active .nav-link:nth-child(4) { 
    transition-delay: 0.4s;
    opacity: 1;
    transform: translateX(0);
}

.mobile-menu .mobile-settings-btn {
    opacity: 0;
    transform: translateX(-50px);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mobile-settings-btn {
    background: none;
    border: 2px solid var(--text);
    border-radius: 2rem;
    color: var(--text);
    cursor: pointer;
    font-size: 1rem;
    margin-top: 2rem;
    opacity: 0;
    padding: 0.75rem 1.5rem;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                background-color 0.3s ease,
                border-color 0.3s ease;
}

.mobile-menu.active .mobile-settings-btn {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.5s;
}

.mobile-settings-btn:hover {
    background: var(--hover);
    transform: translateX(5px);
}

/* Settings Modal */
.settings-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.settings-modal.active {
    opacity: 1;
    visibility: visible;
}

.settings-content {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.settings-modal.active .settings-content {
    transform: scale(1) translateY(0);
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.settings-title {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--accent);
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    background: var(--hover);
    color: var(--accent);
}

.setting-group {
    margin-bottom: 2rem;
}

.setting-label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 1rem;
}

.theme-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

/* Base styles for option buttons */
.theme-option,
.lang-option {
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: none;
    color: #0d0d0d;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    text-align: center;
}

/* Dark mode text colors */
[data-theme="dark"] .theme-option,
[data-theme="dark"] .lang-option {
    color: #f5f5f5;
}

/* Light mode hover states */
html:not([data-theme="dark"]) .theme-option:hover,
html:not([data-theme="dark"]) .lang-option:hover {
    background: #000000 !important;
    color: #ffffff !important;
    border-color: #000000;
    transform: translateY(-1px);
}

/* Dark mode hover states */
[data-theme="dark"] .theme-option:hover,
[data-theme="dark"] .lang-option:hover {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #ffffff;
    transform: translateY(-1px);
}

/* Active states for light mode */
html:not([data-theme="dark"]) .theme-option.active,
html:not([data-theme="dark"]) .lang-option.active {
    background: #000000;
    color: #ffffff;
    border-color: #000000;
}

/* Active + hover states for light mode */
html:not([data-theme="dark"]) .theme-option.active:hover,
html:not([data-theme="dark"]) .lang-option.active:hover {
    background: #ffffff !important;
    color: #000000 !important;
    border-color: #000000;
}

/* Active states for dark mode */
[data-theme="dark"] .theme-option.active,
[data-theme="dark"] .lang-option.active {
    background: #ffffff;
    color: #000000;
    border-color: #ffffff;
}

/* Active + hover states for dark mode */
[data-theme="dark"] .theme-option.active:hover,
[data-theme="dark"] .lang-option.active:hover {
    background: #000000 !important;
    color: #ffffff !important;
    border-color: #ffffff;
}

/* Theme name and code display */
.theme-name {
    display: block;
    font-weight: 500;
}

.theme-code {
    display: block;
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 0.2rem;
}

/* Grid layouts */
.theme-options,
.language-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.lang-name {
    display: block;
    font-weight: 500;
}

.lang-code {
    display: block;
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 0.2rem;
}

/* Hero section - split layout */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    padding: 0 2rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.hero-content {
    padding: 2rem 0;
}

.hero-title {
    font-size: clamp(3rem, 7vw, 6rem);
    font-weight: 200;
    line-height: 0.9;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    opacity: 0;
    transform: translateX(-50px) rotateX(10deg);
    animation: none;
}

.hero-dates {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-weight: 300;
    color: var(--text-muted);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateX(-30px);
    animation: none;
    font-style: italic;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 90%;
    opacity: 0;
    transform: translateX(-30px);
    animation: none;
}

.hero-image-container {
    position: relative;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateX(50px) scale(0.9);
    animation: none;
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 20px;
    cursor: pointer;
    perspective: 1000px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.hero-image {
    width: 100%;
    height: 70vh;
    border-radius: 20px;
    object-fit: cover;
    filter: grayscale(30%) contrast(1.1) brightness(0.95);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow:
        0 25px 50px -12px var(--shadow),
        0 0 0 1px var(--border);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    opacity: 0;
    will-change: transform, opacity, filter;
    pointer-events: none;
}

.hero-image.active {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    pointer-events: auto;
}

.hero-image-container:hover {
    transform: perspective(1000px) rotateY(3deg) translateY(-5px) scale(1.02);
    box-shadow: 
        0 30px 60px -15px var(--shadow),
        0 0 0 1px var(--border);
}

.hero-image-container:hover .hero-image.active {
    filter: grayscale(0%) contrast(1.1) brightness(1.05);
    transform: translate(-50%, -50%) scale(1.02);
}

/* Artistic decorative elements */
.hero-image-container::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    border: 1px solid var(--border);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

.hero-image-container::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: -30px;
    width: 60px;
    height: 60px;
    background: var(--gradient);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    opacity: 0.4;
    animation: morph 8s ease-in-out infinite;
}

/* Content sections with modern artistic touches */
.section {
    padding: 8rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.section-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 200;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 5rem;
    opacity: 0;
    transform: translateY(40px);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--accent);
    opacity: 0.6;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.content-card {
    background: var(--bg);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px var(--shadow);
}

.content-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.content-card:hover:before {
    opacity: 0.3;
}

.card-title, .card-text {
    position: relative;
    z-index: 1;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -15px var(--shadow);
}

.content-card:hover::before {
    opacity: 0.3;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 400;
    margin-bottom: 1rem;
    color: var(--accent);
    letter-spacing: -0.01em;
}

.card-text {
    color: var(--text-muted);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Timeline with modern styling */
.timeline {
    margin-top: 5rem;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
    opacity: 0.5;
}

.timeline-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
    opacity: 0;
    transform: translateY(30px);
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    transform: translateX(-50%);
}

.year {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    font-style: italic;
}

.timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 0.8rem;
    color: var(--accent);
}

.timeline-content p {
    color: var(--text-muted);
    line-height: 1.7;
}

/* Animations */
@keyframes slideDown {
    0% {
        opacity: 0;
        transform: translateY(-30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeScale {
    0% {
        opacity: 0;
        transform: scale(0.9) translateX(-30px);
    }
    60% {
        opacity: 0.8;
        transform: scale(1.05) translateX(5px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateX(0);
    }
}

@keyframes fadeScale {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    0% {
        opacity: 0;
        transform: translateX(-50px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    0% {
        opacity: 0;
        transform: translateX(50px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* Mobile menu styles with enhanced animations and theme-specific styles */
@keyframes mobileMenuEnter {
    0% {
        opacity: 0;
        transform: translateX(-100%) scale(0.98);
    }
    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

.mobile-menu.active {
    animation: mobileMenuEnter 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

html:not([data-theme="dark"]) .mobile-menu {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

html:not([data-theme="dark"]) .mobile-menu .nav-link {
    color: var(--text-muted);
}

html:not([data-theme="dark"]) .mobile-menu .nav-link:hover {
    color: var(--text);
}

html:not([data-theme="dark"]) .hamburger span {
    background-color: var(--text);
}

/* Mobile menu transitions handled by CSS transitions */
@keyframes fadeScale {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

@keyframes morph {
    0%, 100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    25% { border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%; }
    50% { border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%; }
    75% { border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%; }
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

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

/* Responsive design */
@media (max-width: 968px) {
    /* Prevent horizontal scrolling */
    body {
        overflow-x: hidden;
    }

    /* Navigation - make it stick properly */
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        padding: 1rem 1.5rem;
        backdrop-filter: blur(20px);
        border-bottom: 1px solid transparent;
        transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
        background: var(--glass);
        width: 100%;
        box-sizing: border-box;
    }

    .nav-container {
        max-width: 100%;
        width: 100%;
        justify-content: space-between;
        align-items: center;
    }

    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
        position: relative;
        z-index: 101;
    }

    /* Hero section */
    .hero {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
        padding: 7rem 1.5rem 2rem;
        min-height: auto;
        max-width: 100%;
        overflow: hidden;
    }

    .hero-content {
        padding: 1rem 0;
        text-align: center;
        width: 100%;
        box-sizing: border-box;
    }

    .hero-title {
        text-align: center;
        width: 100%;
    }

    .hero-dates {
        text-align: center;
        width: 100%;
    }

    .hero-desc {
        text-align: center;
        width: 100%;
        max-width: 100%;
    }

    .hero-image-container {
        order: -1;
        height: 50vh;
        width: 100%;
        max-width: 100%;
        margin: 0 auto;
    }

    .hero-image {
        height: 100%;
        object-position: center;
        width: 100%;
        max-width: 100%;
    }

    /* Content sections */
    .section {
        padding: 6rem 1.5rem;
        max-width: 100%;
        overflow: hidden;
    }

    .section-title {
        font-size: clamp(2rem, 5vw, 3rem);
        margin-bottom: 3rem;
        text-align: center;
        width: 100%;
    }

    /* Timeline */
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding-left: 3rem;
    }

    .timeline-item::before {
        left: 20px;
    }

    /* Settings modal */
    .settings-content {
        margin: 1rem;
        padding: 1.5rem;
        max-width: calc(100% - 2rem);
        width: calc(100% - 2rem);
        box-sizing: border-box;
    }

    .settings-header {
        margin-bottom: 1.5rem;
    }

    .theme-options,
    .language-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .theme-option,
    .lang-option {
        padding: 0.875rem;
        font-size: 0.95rem;
    }

    /* Content grid */
    .content-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 2rem;
    }

    /* Ensure all content stays within bounds */
    * {
        max-width: 100%;
        box-sizing: border-box;
    }
}

@media (max-width: 480px) {
    /* Navigation */
    .nav {
        padding: 1rem;
        position: fixed;
        width: 100%;
        box-sizing: border-box;
    }

    .nav-container {
        width: 100%;
        max-width: 100%;
    }

    .logo {
        font-size: 0.9rem;
    }

    /* Mobile menu */
    .mobile-menu .nav-link {
        font-size: 1.5rem;
    }

    /* Hero section */
    .hero {
        padding: 6rem 1rem 1rem;
        text-align: center;
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .hero-content {
        width: 100%;
        text-align: center;
    }

    .hero-title {
        font-size: clamp(2.5rem, 6vw, 4rem);
        text-align: center;
    }

    .hero-desc {
        font-size: 1rem;
        line-height: 1.6;
        text-align: center;
        max-width: 100%;
    }

    /* Sections */
    .section {
        padding: 4rem 1rem;
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .section-title {
        font-size: clamp(1.75rem, 4vw, 2.5rem);
        margin-bottom: 2.5rem;
        text-align: center;
    }

    /* Content cards */
    .content-card {
        padding: 1.5rem;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .card-title {
        font-size: 1.2rem;
    }

    .card-text {
        font-size: 0.9rem;
    }

    /* Settings modal */
    .settings-content {
        padding: 1.25rem;
        width: calc(100% - 2rem);
        max-width: calc(100% - 2rem);
        margin: 1rem;
        box-sizing: border-box;
    }

    .setting-label {
        font-size: 0.95rem;
        margin-bottom: 0.75rem;
    }

    .settings-title {
        font-size: 1.25rem;
    }

    /* Ensure no horizontal overflow */
    html, body {
        overflow-x: hidden;
        max-width: 100%;
    }

    * {
        max-width: 100%;
        box-sizing: border-box;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Gallery Viewer */
.gallery-viewer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] .gallery-viewer {
    background: rgba(0, 0, 0, 0.8);
}

.gallery-viewer.active {
    opacity: 1;
    visibility: visible;
}

.gallery-content {
    position: relative;
    width: 90%;
    height: 90%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.98) translateY(10px);
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-viewer.active .gallery-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.gallery-image-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-image {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 10px 30px -10px var(--shadow);
}

.gallery-image.active {
    opacity: 1;
    transform: scale(1);
}

.gallery-title {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    color: var(--text);
    font-size: 1.2rem;
    padding: 12px 24px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 20px;
    z-index: 1;
    text-align: center;
    min-width: 200px;
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-viewer.active .gallery-title {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.gallery-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text);
    font-size: 24px;
    line-height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1;
    padding: 0;
    text-align: center;
    transform: scale(0.9);
    opacity: 0;
}

.gallery-viewer.active .gallery-close {
    transform: scale(1);
    opacity: 1;
    transition-delay: 0.1s;
}

.gallery-close:hover {
    background: var(--hover);
    transform: scale(1.1);
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%) scale(0.9);
    width: 50px;
    height: 50px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text);
    font-size: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1;
    opacity: 0;
}

.gallery-viewer.active .gallery-nav {
    opacity: 1;
    transform: translateY(-50%) scale(1);
}

.gallery-nav.prev {
    left: 20px;
    transition-delay: 0.2s;
}

.gallery-nav.next {
    right: 20px;
    transition-delay: 0.2s;
}

.gallery-nav:hover {
    background: var(--hover);
    transform: translateY(-50%) scale(1.1);
}

/* Reference icons styling */
.ref-icon-container {
    position: absolute;
    bottom: 15px;
    right: 15px;
    width: 24px;
    height: 24px;
    cursor: pointer;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.content-card:hover .ref-icon-container {
    opacity: 1;
    transform: translateY(0);
}

@media (hover: none) {
    .ref-icon-container {
        opacity: 0.7;
        transform: translateY(0);
    }
}

.ref-icon {
    position: absolute;
    top: 0;
    left: 0;
    width: 24px;
    height: 24px;
    color: var(--accent);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    transform-origin: center;
}

.ref-icon.world {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

.ref-icon.arrow {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.ref-icon-container:hover .ref-icon.arrow,
.ref-icon-container:active .ref-icon.arrow {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

.ref-icon-container:hover .ref-icon.world,
.ref-icon-container:active .ref-icon.world {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.ref-icon-container::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    border-radius: 50%;
}

.ref-icon-container:hover::before,
.ref-icon-container:active::before {
    opacity: 1;
}

@media (max-width: 768px) {
    .ref-icon-container {
        width: 32px;
        height: 32px;
        padding: 4px;
    }

    .ref-icon {
        width: 28px;
        height: 28px;
    }

    .ref-icon-container::before {
        top: -8px;
        left: -8px;
        right: -8px;
        bottom: -8px;
    }
}

@media (max-width: 768px) {
    .gallery-nav {
        width: 40px;
        height: 40px;
        font-size: 24px;
    }
    
    .gallery-title {
        font-size: 1rem;
        padding: 8px 16px;
        min-width: 160px;
    }
    
    .gallery-close {
        width: 35px;
        height: 35px;
        font-size: 20px;
        top: 15px;
        right: 15px;
    }
}

/* Selection styling */
::selection {
    background: var(--accent);
    color: var(--bg);
}