:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --background-color: #f5f6fa;
    --surface-color: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #ecf0f1;
    --gradient-1: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    --gradient-2: linear-gradient(135deg, #34495e 0%, #3498db 100%);
    --hover-bg: rgba(44, 62, 80, 0.1);
    --shadow-sm: 0 2px 4px rgba(44, 62, 80, 0.06);
    --shadow-md: 0 4px 6px rgba(44, 62, 80, 0.1);
    --shadow-lg: 0 8px 16px rgba(44, 62, 80, 0.12);
}

@font-face {
    font-family: 'SF Pro Display';
    src: url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-regular-webfont.woff');
    font-weight: 400;
}

@font-face {
    font-family: 'SF Pro Display';
    src: url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-medium-webfont.woff');
    font-weight: 500;
}

@font-face {
    font-family: 'SF Pro Display';
    src: url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-semibold-webfont.woff');
    font-weight: 600;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.5;
    letter-spacing: -0.022em;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.header {
    text-align: left;
    margin-bottom: 1rem;
}

.profile-container {
    background: var(--surface-color);
    border-radius: 1rem;
    padding: 2rem;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-container:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.profile-image {
    width: 160px;
    height: 160px;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

h2 {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.profile-stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.stat-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.stat-link {
    text-decoration: none;
    color: var(--primary-color);
    transition: opacity 0.3s ease;
}

.stat-link:hover {
    opacity: 0.8;
}

.about {
    background: var(--surface-color);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-top: 1rem;
    box-shadow: var(--shadow-md);
}

.about p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.about p:last-child {
    margin-bottom: 0;
}

.expertise {
    margin-top: 2rem;
}

.expertise h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.expertise-item {
    background: linear-gradient(to bottom right, var(--surface-color), #f8faff);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.expertise-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.expertise-item i {
    font-size: 2rem;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.expertise-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.expertise-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

footer {
    background: linear-gradient(to bottom, var(--surface-color), var(--background-color));
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 3rem;
}

footer p {
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    padding: 0 1.5rem;
}

#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

.loading-content {
    position: relative;
    width: 60px;
    height: 60px;
}

.loading-circle {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-radius: 50%;
}

.loading-circle:nth-child(1) {
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

.loading-circle:nth-child(2) {
    border-right-color: var(--secondary-color);
    animation: spin 1.5s linear reverse infinite;
}

.loading-circle:nth-child(3) {
    border-bottom-color: var(--accent-color);
    animation: spin 1.2s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.ai-news {
    background: var(--surface-color);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-1);
}

.ai-news h3 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 24px;
    font-weight: 400;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.news-card {
    background: linear-gradient(to bottom right, var(--surface-color), #f8faff);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.news-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-content {
    padding: 1.5rem;
}

.news-source {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.news-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.news-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.news-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.news-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.loading-news {
    text-align: center;
    padding: 2rem;
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loading-content-small {
    width: 40px;
    height: 40px;
}

.loading-content-small .loading-circle {
    border-width: 2px;
}

.loading-news .loading-spinner {
    margin-bottom: 16px;
}

.loading-news p {
    color: var(--text-secondary);
    font-size: 14px;
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }

    .profile-container {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 1.5rem;
    }

    .profile-image {
        margin: 0 auto;
        width: 140px;
        height: 140px;
    }

    .profile-stats {
        justify-content: center;
        flex-wrap: wrap;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .nav-menu {
        height: auto;
        position: fixed;
        background: rgba(255, 255, 255, 0.98);
    }

    .nav-content {
        padding: 0 1rem;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links:not(.nav-menu-mobile .nav-links),
    .nav-info:not(.nav-menu-mobile .nav-info) {
        display: none;
    }

    .nav-menu-mobile {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        padding: 80px 1.5rem 2rem;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 1000;
        overflow-y: auto;
    }

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

    .nav-menu-mobile .nav-links {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 2rem;
    }

    .nav-menu-mobile .nav-link {
        font-size: 1.1rem;
        padding: 0.75rem 1rem;
        width: 100%;
    }

    .nav-menu-mobile .nav-info {
        flex-direction: column;
        gap: 1rem;
        padding-top: 2rem;
        border-top: 1px solid var(--border-color);
        border-left: none;
        margin-left: 0;
    }

    .nav-menu-mobile .nav-info-item {
        font-size: 1rem;
    }

    .nav-menu-mobile .nav-info-item i {
        font-size: 1.1rem;
        width: 24px;
        text-align: center;
    }

    .nav-logo {
        flex: 1;
        margin-right: 3rem;
    }

    .mobile-menu .logo-image {
        min-width: 65px;
        min-height: 65px;
        width: 65px;
        height: 65px;
        padding: 1px;
        aspect-ratio: 1/1;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-menu .logo-image img {
        width: 100%;
        height: 100%;
        aspect-ratio: 1/1;
        object-fit: cover;
    }

    .mobile-menu .logo-main {
        font-size: 1.3rem;
    }

    .mobile-menu .logo-sub {
        font-size: 0.85rem;
    }

    .mobile-menu-panel {
        display: block;
    }
}

@media (max-width: 480px) {
    .logo-image {
        width: 40px;
        height: 40px;
    }

    .logo-main {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .nav-content {
        padding: 0.75rem;
    }

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

    .logo-sub {
        font-size: 0.8rem;
    }

    .nav-link {
        font-size: 1rem;
        padding: 0.6rem 1.25rem;
    }

    .nav-info-item {
        font-size: 0.9rem;
    }

    /* Adjust main container padding */
    .main-container {
        padding-top: 160px;
    }

    .menu-toggle {
        right: 0.75rem;
    }

    .nav-logo {
        margin-right: 2.5rem;
    }

    .mobile-menu .logo-image {
        min-width: 70px;
        min-height: 70px;
        width: 70px;
        height: 70px;
        padding: 1px;
        aspect-ratio: 1/1;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-menu .logo-image img {
        width: 100%;
        height: 100%;
        aspect-ratio: 1/1;
        object-fit: cover;
    }

    .mobile-menu .logo-main {
        font-size: 1.2rem;
        line-height: 1.2;
    }

    .mobile-menu .logo-sub {
        font-size: 0.8rem;
        line-height: 1.2;
    }

    .mobile-menu-content {
        padding: 100px 1rem 2rem;
    }

    .mobile-menu-panel .nav-link {
        font-size: 1.2rem;
        padding: 1rem;
    }

    .mobile-menu-panel .nav-link i {
        font-size: 1.4rem;
        width: 32px;
    }
}

/* Desktop Menu */
.desktop-menu {
    display: block;
}

.mobile-menu {
    display: none;
}

.nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.nav-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem;
    position: relative;
}

.logo-image {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid transparent;
    background: var(--gradient-1);
    padding: 1px;
    animation: borderPulse 2s infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    aspect-ratio: 1/1;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.logo-main {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.logo-main::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 2px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.logo:hover .logo-main::after {
    transform: scaleX(1);
    transform-origin: left;
}

.logo-sub {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1rem;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.nav-link i {
    font-size: 1.125rem;
}

.nav-link:hover {
    color: var(--text-secondary);
    background: none;
}

.nav-link.active {
    color: var(--text-secondary);
    background: none;
}

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

.nav-info {
    display: flex;
    gap: 1rem;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border-left: 1px solid var(--border-color);
    margin-left: 0.5rem;
}

.nav-info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.nav-info-item i {
    font-size: 1rem;
    color: var(--primary-color);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1002;
}

.mobile-menu-panel {
    visibility: hidden;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    transform: translateX(100%);
    transition: transform 0.3s ease, visibility 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
}

.mobile-menu-panel.active {
    visibility: visible;
    transform: translateX(0);
}

.mobile-menu-content {
    padding: 80px 1.5rem 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.mobile-menu-panel .nav-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.mobile-menu-panel .nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.25rem;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    background: transparent;
}

.mobile-menu-panel .nav-link i {
    font-size: 1.5rem;
    width: 32px;
    text-align: center;
    color: var(--primary-color);
}

.mobile-menu-panel .nav-link:hover,
.mobile-menu-panel .nav-link.active {
    color: var(--text-secondary);
    background: none;
}

.mobile-menu-panel .nav-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.mobile-menu-panel .nav-info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.mobile-menu-panel .nav-info-item i {
    font-size: 1.25rem;
    width: 32px;
    text-align: center;
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .desktop-menu {
        display: none;
    }

    .mobile-menu {
        display: block;
    }

    .menu-toggle {
        display: block;
    }

    .mobile-menu .nav-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0 1.5rem;
        height: 80px;
    }

    .mobile-menu .nav-logo {
        flex: 1;
        margin-right: 2rem;
    }

    .mobile-menu .logo-image {
        min-width: 65px;
        min-height: 65px;
        width: 65px;
        height: 65px;
        padding: 1px;
        aspect-ratio: 1/1;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-menu .logo-image img {
        width: 100%;
        height: 100%;
        aspect-ratio: 1/1;
        object-fit: cover;
    }

    .mobile-menu .logo-main {
        font-size: 1.3rem;
    }

    .mobile-menu .logo-sub {
        font-size: 0.85rem;
    }

    .mobile-menu-panel {
        display: block;
    }
}

@media (max-width: 480px) {
    .mobile-menu .nav-content {
        padding: 0 1rem;
        height: 90px;
    }

    .mobile-menu .logo-image {
        min-width: 70px;
        min-height: 70px;
        width: 70px;
        height: 70px;
        padding: 1px;
        aspect-ratio: 1/1;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-menu .logo-image img {
        width: 100%;
        height: 100%;
        aspect-ratio: 1/1;
        object-fit: cover;
    }

    .mobile-menu-content {
        padding: 100px 1rem 2rem;
    }

    .mobile-menu-panel .nav-link {
        font-size: 1.2rem;
        padding: 1rem;
    }

    .mobile-menu-panel .nav-link i {
        font-size: 1.4rem;
        width: 32px;
    }
}

/* Main Container */
.main-container {
    padding-top: 80px;
    position: relative;
    z-index: 1;
}

.section {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.section.active {
    display: block;
    opacity: 1;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Update existing components for new layout */
.header {
    margin-top: 1rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-info {
        display: none;
    }
}

/* Add subtle blue animation to logo */
@keyframes borderPulse {
    0% {
        border-color: transparent;
    }
    50% {
        border-color: var(--accent-color);
    }
    100% {
        border-color: transparent;
    }
}

/* Add blue glow effect on hover for interactive elements */
.nav-link:hover, .expertise-item:hover, .news-card:hover {
    box-shadow: 0 4px 12px rgba(0, 98, 255, 0.15);
}

/* Add blue selection color */
::selection {
    background: var(--primary-color);
    color: white;
}

/* Add subtle blue hover effect to links */
a:hover {
    color: var(--accent-color);
}

/* Add blue focus outline */
:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Add subtle blue shadow to images */
img {
    filter: drop-shadow(0 2px 4px rgba(0, 98, 255, 0.1));
}

/* Add blue tint to code blocks if any */
pre, code {
    background: var(--background-color);
    border: 1px solid var(--border-color);
}

/* Update button styles if any */
button {
    background: var(--gradient-1);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Add subtle blue background pattern */
body {
    background-color: var(--background-color);
}

/* Add blue accent to scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

@media (min-width: 769px) {
    .nav-menu-mobile {
        display: none;
    }
}