/* Metal Shaders Design Variables */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Orbitron:wght@400;500;600;700;800;900&display=swap');

:root {
    /* Metal Shaders Color Palette */
    --primary-navy: #000000;
    --secondary-navy: #0a0a0a;
    --accent-cyan: #00FFD1;
    --accent-purple: #C061FF;
    --accent-blue: #4A90E2;
    --text-white: #ffffff;
    --text-gray: #a0aec0;
    --text-muted: #718096;
    --border-gray: rgba(255, 255, 255, 0.1);
    --gradient-primary: linear-gradient(135deg, #000000 0%, #0a0a0a 100%);
    --gradient-hero: linear-gradient(135deg, #000000 0%, #0a0a0a 50%, #1a1a1a 100%);
    --gradient-accent: linear-gradient(135deg, #C061FF, #00FFD1);
    --shadow-dark: 0 4px 20px rgba(0, 0, 0, 0.5);
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-glow-cyan: 0 0 20px rgba(0, 255, 209, 0.3);
    --shadow-glow-purple: 0 0 20px rgba(192, 97, 255, 0.3);
    --border-radius: 8px;
    --border-radius-large: 12px;
    --transition: all 0.3s ease;
    --font-size-hero: clamp(2rem, 4vw, 3.5rem);
    --font-size-h2: clamp(2rem, 4vw, 3rem);
    --font-size-h3: clamp(1.25rem, 2.5vw, 1.75rem);
    --container-max-width: 1200px;
    --section-padding: 100px 0;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    background: var(--primary-navy);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Orbitron', sans-serif;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.qudora-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(26, 29, 41, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-gray);
    z-index: 1000;
    transition: var(--transition);
    padding: 0.75rem 0;
}

.qudora-header.scrolled {
    background: rgba(26, 29, 41, 0.98);
    box-shadow: var(--shadow-dark);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.header-logo .logo-img {
    height: 80px;
    width: auto;
    transition: var(--transition);
}

.header-logo .logo-img:hover {
    transform: scale(1.05);
}

.header-nav .nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.header-nav .nav-menu li a {
    color: var(--text-white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.header-nav .nav-menu li a:hover {
    color: var(--accent-cyan);
    background: rgba(0, 255, 209, 0.1);
}

.header-cta .contact-btn {
    background: transparent;
    color: var(--accent-cyan);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
}

.header-cta .contact-btn:hover {
    background: rgba(0, 255, 209, 0.1);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-cyan);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-white);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero Section */
.hero-section-qudora {
    min-height: calc(100vh - 40px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: 40px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(192, 97, 255, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 255, 209, 0.15) 0%, transparent 60%),
        linear-gradient(135deg,
            rgba(0, 0, 0, 0.9) 0%,
            rgba(10, 10, 10, 0.8) 40%,
            rgba(26, 26, 26, 0.7) 100%
        );
    animation: float 20s ease-in-out infinite;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 400'%3E%3Cpath d='M0,100 C300,200 600,50 900,150 C1050,200 1150,100 1200,150 L1200,400 L0,400 Z' fill='%239ca3af' fill-opacity='0.03'/%3E%3Cpath d='M0,200 C250,100 500,250 750,150 C900,100 1100,200 1200,100 L1200,400 L0,400 Z' fill='%236b7280' fill-opacity='0.04'/%3E%3C/svg%3E") no-repeat center center;
    background-size: cover;
    opacity: 0.8;
    animation: wave 15s ease-in-out infinite;
}

.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239ca3af' fill-opacity='0.02'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
    opacity: 0.4;
}

.hero-content-container {
    position: relative;
    z-index: 2;
    max-width: var(--container-max-width);
    width: 100%;
    padding: 0 2rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    margin-top: 60px;
}

.hero-text {
    text-align: left;
    max-width: 1100px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 2.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #b0b3c1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: left;
}

/* Hero subtitle with image layout */
.hero-subtitle-with-image {
    display: flex;
    align-items: flex-start;
    gap: 3rem;
    margin-bottom: 2rem;
}

.hero-subtitle-with-image h2 {
    font-size: 1.2rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-gray);
    flex: 1;
    margin: 0;
    order: 1;
}

.hero-subtitle-with-image h2 a {
    color: var(--text-white);
    text-decoration: none;
    transition: var(--transition);
}

.hero-subtitle-with-image h2 a:hover {
    color: var(--accent-teal);
    text-decoration: underline;
}

/* Keyword highlighting */
.keyword-highlight {
    background: rgba(0, 255, 209, 0.1);
    color: var(--accent-cyan);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid rgba(0, 255, 209, 0.2);
}

.keyword-highlight:hover {
    background: rgba(0, 255, 209, 0.2);
    color: var(--text-white);
    box-shadow: var(--shadow-glow-cyan);
}

a.keyword-highlight {
    text-decoration: none;
    display: inline-block;
}

a.keyword-highlight:hover {
    transform: translateY(-1px);
}

/* Quantum visual styling */
.hero-subtitle-with-image .quantum-visual {
    width: 100%;
    max-width: 280px;
    height: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border-right: 2px solid var(--accent-teal);
    border-bottom: 2px solid var(--accent-teal);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) rotate(45deg); }
    40% { transform: translateY(-10px) rotate(45deg); }
    60% { transform: translateY(-5px) rotate(45deg); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

@keyframes wave {
    0%, 100% {
        transform: translateX(0) scale(1);
        opacity: 0.8;
    }
    25% {
        transform: translateX(-20px) scale(1.02);
        opacity: 0.6;
    }
    50% {
        transform: translateX(0) scale(1.05);
        opacity: 0.9;
    }
    75% {
        transform: translateX(20px) scale(1.02);
        opacity: 0.7;
    }
}

/* Buttons */
.btn-primary {
    background: transparent;
    color: var(--accent-cyan);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
}

.btn-primary:hover {
    background: rgba(0, 255, 209, 0.1);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-cyan);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-purple);
    padding: 1rem 2rem;
    border: 2px solid var(--accent-purple);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
    display: inline-block;
}

.btn-secondary:hover {
    background: rgba(192, 97, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-purple);
}

.btn-secondary span {
    margin-left: 0.5rem;
    transition: var(--transition);
}

.btn-secondary:hover span {
    transform: translateX(5px);
}

/* Sections */
.section {
    padding: var(--section-padding);
    position: relative;
}

.section:nth-child(even) {
    background: var(--secondary-navy);
}

.section-title {
    font-size: var(--font-size-h2);
    font-weight: 700;
    margin-bottom: 4rem;
    color: var(--text-white);
    background: linear-gradient(135deg, #ffffff 0%, #9ca3af 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: left;
}

/* Mission Section */
.mission-section .section-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 6rem;
    align-items: center;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.mission-text {
    max-width: 100%;
}

.mission-text p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    text-align: left;
}

.mission-text strong {
    color: var(--text-white);
}

.mission-text a,
.mission-text a:visited {
    color: var(--text-white);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    font-weight: 700;
}

.mission-text a:hover, .mission-text a:focus {
    color: var(--primary-navy);
    background: var(--text-white);
    border-radius: 4px;
    padding: 0 0.15rem;
    outline: none;
    text-decoration: none;
}

.hero-subtitle-with-image .visual-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    width: 280px;
    order: 2;
    flex-basis: 280px;
}

.quantum-visual {
    max-width: 300px;
    height: auto;
    margin-bottom: 1rem;

    /* Animation */
    display: inline-block;
    transform-origin: 50% 50%;
    animation: quantum-spin 30s linear infinite;
    will-change: transform, filter;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
}

.quantum-visual:hover {
    animation-duration: 8s;
    filter: drop-shadow(0 8px 28px rgba(99, 102, 241, 0.35));
}

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

@media (prefers-reduced-motion: reduce) {
    .quantum-visual {
        animation: none;
        transition: transform 200ms ease;
    }
    .quantum-visual:hover {
        transform: scale(1.03);
        filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.25));
    }
}

/* Open Source Projects Section */
.opensource-projects {
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.projects-heading {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-gray);
    margin-bottom: 1rem;
    text-align: left;
    letter-spacing: 0.5px;
}

.projects-container {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.btn-project {
    background: transparent;
    color: var(--accent-purple);
    padding: 1.25rem 2.5rem;
    border: 3px solid var(--accent-purple);
    border-radius: var(--border-radius-large);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
    display: inline-block;
    font-family: 'Orbitron', sans-serif;
}

.btn-project:hover {
    background: rgba(192, 97, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-purple);
}

/* Legacy support - keep for other pages */
.project-svg-link {
    display: inline-block;
    transition: var(--transition);
    border-radius: var(--border-radius-large);
    overflow: hidden;
}

.project-svg-link:hover {
    transform: translateY(-4px);
    filter: drop-shadow(0 8px 24px rgba(102, 126, 234, 0.3));
}

.project-svg {
    width: auto;
    height: 100px;
    transition: var(--transition);
    border-radius: var(--border-radius-large);
}

.project-svg:hover {
    filter: brightness(1.1) saturate(1.2);
}

.visual-caption {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.4;
    text-align: center;
    max-width: 320px;
}

/* Technology Section */
.tech-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 6rem;
    align-items: center;
}

.tech-text p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    text-align: left;
}

.tech-visual {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tech-diagram {
    max-width: 400px;
    height: auto;
    margin-bottom: 1rem;
}

/* Services Section */
.services-content {
    text-align: center;
}

.services-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-gray);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-cyan);
    box-shadow: 0 10px 30px rgba(0, 255, 209, 0.2);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    font-size: 3rem;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: var(--font-size-h3);
    color: var(--text-white);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Team Section */
.team-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.team-member-featured {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 3rem;
    align-items: start;
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
}

.member-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius);
}

.member-name {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: 0.5rem;
}

.member-role {
    color: var(--accent-teal);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.member-links {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.member-links a {
    color: var(--text-gray);
    font-size: 1.2rem;
    transition: var(--transition);
}

.member-links a:hover {
    color: var(--accent-teal);
}

.member-bio p, .member-bio ul {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.member-bio strong {
    color: var(--text-white);
}

.member-bio ul {
    padding-left: 1.5rem;
}

/* Research Section */
.research-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.research-highlight {
    margin-bottom: 3rem;
}

/* Quantum Code Container (Enhanced from original) */
.quantum-code-container {
    background: linear-gradient(135deg, #1a202c, #2d3748);
    border-radius: var(--border-radius-large);
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid var(--border-gray);
    box-shadow: var(--shadow-dark);
    position: relative;
    overflow: hidden;
}

.quantum-code-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-teal), var(--accent-purple));
}

.quantum-code-header {
    color: var(--text-white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quantum-code-header::before {
    content: '⟨ψ∣';
    font-size: 1.2rem;
    color: var(--accent-teal);
}

.quantum-code-block {
    background: #171923;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-white);
    overflow-x: auto;
    border: 1px solid #2d3748;
}

.code-key { color: #aadde6; }
.code-string { color: #a6cfe8; }
.code-bracket { color: var(--accent-teal); font-weight: bold; }
.code-operator { color: #fc8181; }

.quantum-explanation {
    background: rgba(156, 163, 175, 0.1);
    border-left: 4px solid var(--accent-teal);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-size: 0.95rem;
    color: var(--text-gray);
    font-style: italic;
}

/* News Section */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.news-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    transition: var(--transition);
}

.news-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.1);
}

.news-date {
    color: var(--accent-teal);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.news-title {
    color: var(--text-white);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.news-excerpt {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Contact Section */
.contact-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-gray);
    border-radius: var(--border-radius);
    color: var(--text-white);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-teal);
    box-shadow: 0 0 0 2px rgba(156, 163, 175, 0.2);
}

.contact-details h3 {
    color: var(--text-white);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.contact-email a {
    color: var(--accent-teal);
    text-decoration: none;
    font-size: 1.1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-links a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-gray);
    font-size: 1.2rem;
    transition: var(--transition);
    border: 1px solid var(--border-gray);
}

.social-links a:hover {
    background: var(--accent-teal);
    color: var(--primary-navy);
    transform: translateY(-3px);
}

/* Footer */
.footer-qudora {
    background: var(--primary-navy);
    border-top: 1px solid var(--border-gray);
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo-img {
    height: 40px;
    width: auto;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-teal);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--accent-teal);
    color: var(--primary-navy);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.2rem;
    box-shadow: var(--shadow-dark);
    transition: var(--transition);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
}

.back-to-top:hover {
    background: var(--text-white);
    transform: translateY(-5px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

/* Service CTAs */
.services-cta,
.research-cta,
.news-cta {
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
        --font-size-hero: 2.5rem;
        --font-size-h2: 2rem;
    }

    .header-nav {
        display: none;
    }

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

    .nav-menu.active {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-navy);
        flex-direction: column;
        padding: 2rem;
        border-top: 1px solid var(--border-gray);
        box-shadow: var(--shadow-dark);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-subtitle-with-image {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .hero-subtitle-with-image .visual-content {
        width: 200px;
        align-self: center;
        order: 1;
    }

    .hero-subtitle-with-image h2 {
        order: 2;
    }

    .opensource-projects {
        margin-top: 1.5rem;
        margin-bottom: 1rem;
    }

    .projects-container {
        gap: 1rem;
        justify-content: flex-start;
        flex-direction: column;
    }

    .btn-project {
        width: 100%;
        text-align: center;
        padding: 1rem 2rem;
        font-size: 1rem;
    }

    .project-svg {
        height: 80px;
    }

    .mission-section .section-content,
    .tech-content,
    .team-member-featured,
    .contact-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .services-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .container {
        padding: 0 1rem;
    }

    .header-container {
        padding: 0 1rem;
    }
}

/* Services Page Specific Styles */
.services-hero {
    padding-top: 120px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    font-weight: 400;
}

.services-detailed-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.service-detailed-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    position: relative;
    transition: var(--transition);
}

.service-detailed-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-dark);
}

.service-number {
    position: absolute;
    top: -15px;
    left: 2rem;
    width: 40px;
    height: 40px;
    background: var(--accent-teal);
    color: var(--primary-navy);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.service-detailed-title {
    font-size: 1.4rem;
    color: var(--text-white);
    margin-bottom: 1.5rem;
    margin-top: 1rem;
}

.service-detailed-content p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.service-detailed-content strong {
    color: var(--text-white);
}

.service-guarantee {
    background: rgba(156, 163, 175, 0.1);
    padding: 1rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-teal);
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.service-guarantee i {
    color: var(--accent-teal);
    font-size: 1.1rem;
}

.service-guarantee em {
    color: var(--text-gray);
    font-style: italic;
}

/* Technical Expertise Section */
.section-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.expertise-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    transition: var(--transition);
}

.expertise-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-dark);
}

.expertise-icon {
    font-size: 2.5rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.expertise-card h3 {
    font-size: 1.3rem;
    color: var(--text-white);
    margin-bottom: 1rem;
}

.expertise-card p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.expertise-list {
    list-style: none;
    padding: 0;
}

.expertise-list li {
    color: var(--text-gray);
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    padding-left: 1.5rem;
}

.expertise-list li:before {
    content: '▸';
    color: var(--accent-teal);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.expertise-list li:last-child {
    border-bottom: none;
}

/* Process & Approach Section */
.approach-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.principle-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    text-align: center;
    transition: var(--transition);
}

.principle-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.principle-icon {
    font-size: 2rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.principle-item h3 {
    font-size: 1.2rem;
    color: var(--text-white);
    margin-bottom: 1rem;
}

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

/* Common Problems Section */
.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.problem-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    transition: var(--transition);
}

.problem-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-dark);
}

.problem-icon {
    font-size: 2rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.problem-card h3 {
    font-size: 1.1rem;
    color: var(--text-white);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.problem-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Getting Started Section */
.flow-intro {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.flow-step {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.flow-step:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: var(--accent-teal);
    color: var(--primary-navy);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.flow-step h3 {
    font-size: 1.2rem;
    color: var(--text-white);
    margin: 1rem 0;
}

.flow-step p {
    color: var(--text-gray);
    line-height: 1.6;
}

.investment-ranges {
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    margin-bottom: 3rem;
}

.investment-ranges h3 {
    font-size: 1.4rem;
    color: var(--text-white);
    margin-bottom: 2rem;
    text-align: center;
}

.ranges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.range-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-gray);
    text-align: center;
}

.range-item strong {
    color: var(--text-white);
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}

.range-item p {
    color: var(--text-gray);
    font-size: 0.9rem;
    line-height: 1.4;
}

.pricing-note {
    text-align: center;
    font-style: italic;
    color: var(--text-muted);
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .btn-primary,
    .btn-secondary {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .service-card,
    .news-item,
    .contact-form {
        padding: 1.5rem;
    }

    .services-detailed-grid,
    .expertise-grid,
    .principles-grid,
    .problems-grid,
    .flow-steps {
        grid-template-columns: 1fr;
    }

    .services-detailed-card,
    .expertise-card,
    .principle-item,
    .problem-card,
    .flow-step {
        padding: 1.5rem;
    }

    .services-hero {
        padding-top: 100px;
    }
}

/* Team/About Page Specific Styles */
.team-hero {
    padding-top: 120px;
}

.founder-profile {
    padding: var(--section-padding) 0;
}

.founder-detailed {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 4rem;
    align-items: start;
}

.founder-image-section {
    text-align: center;
}

.founder-image {
    width: 100%;
    max-width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 2rem;
    border: 4px solid var(--accent-teal);
    box-shadow: var(--shadow-dark);
}

.founder-credentials h3 {
    color: var(--text-white);
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.founder-title {
    color: var(--accent-teal);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
}

.founder-content {
    color: var(--text-gray);
    max-width: 1000px;
}

.founder-intro {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 3rem;
    color: var(--text-gray);
}

.founder-statement {
    margin-bottom: 3rem;
}

.founder-statement .statement-text {
    font-size: 1.15rem;
    line-height: 1.9;
    color: var(--text-gray);
    font-weight: 400;
    letter-spacing: 0.01em;
    hyphens: auto;
    -webkit-hyphens: auto;
    text-align: left;
}

.founder-statement .statement-text p {
    margin-bottom: 1.1rem;
}

@media (min-width: 1100px) {
    .founder-statement .statement-text {
        column-count: 2;
        column-gap: 2.5rem;
        column-fill: balance;
    }
    .founder-statement .statement-text p {
        break-inside: avoid;
    }
}

@media (max-width: 1099px) {
    .founder-statement .statement-text {
        max-width: 75ch;
    }
}

.education-section,
.expertise-section,
.achievements-section,
.philosophy-section {
    margin-bottom: 3rem;
}

.education-section h3,
.expertise-section h3,
.achievements-section h3,
.philosophy-section h3 {
    color: var(--text-white);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.education-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    display: flex;
    gap: 1rem;
    align-items: center;
    transition: var(--transition);
}

.education-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-3px);
}

.education-icon {
    font-size: 2rem;
    color: var(--accent-teal);
    flex-shrink: 0;
}

.education-details h4 {
    color: var(--text-white);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.education-details p {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.education-focus {
    color: var(--accent-teal);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.expertise-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.expertise-highlight {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    transition: var(--transition);
}

.expertise-highlight:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.highlight-icon {
    font-size: 2.5rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.expertise-highlight h4 {
    color: var(--text-white);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

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

.achievements-grid {
    display: grid;
    gap: 1.5rem;
}

.achievement-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    display: flex;
    gap: 1.5rem;
    align-items: center;
    transition: var(--transition);
}

.achievement-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-3px);
}

.achievement-medal {
    font-size: 2.5rem;
    color: var(--accent-teal);
    flex-shrink: 0;
}

.achievement-content h4 {
    color: var(--text-white);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.achievement-content p {
    color: var(--text-gray);
    line-height: 1.6;
}

.founder-quote {
    background: rgba(156, 163, 175, 0.1);
    border-left: 4px solid var(--accent-teal);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-size: 1.1rem;
    color: var(--text-white);
    font-style: italic;
    line-height: 1.6;
}

.philosophy-text {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 1rem;
}

.network-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.network-areas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.network-area {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    text-align: center;
    transition: var(--transition);
}

.network-area:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.network-icon {
    font-size: 2.5rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.network-area h3 {
    color: var(--text-white);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.network-area p {
    color: var(--text-gray);
    line-height: 1.6;
}

.network-note {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-gray);
    text-align: center;
}

.network-note p {
    color: var(--text-muted);
    font-style: italic;
    margin: 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.value-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    text-align: center;
    transition: var(--transition);
}

.value-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.value-icon {
    font-size: 2rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.value-item h3 {
    color: var(--text-white);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

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

/* About page responsive adjustments */
@media (max-width: 768px) {
    .founder-detailed {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .education-grid {
        grid-template-columns: 1fr;
    }

    .expertise-highlights {
        grid-template-columns: 1fr;
    }

    .achievement-item {
        flex-direction: column;
        text-align: center;
    }

    .network-areas,
    .values-grid {
        grid-template-columns: 1fr;
    }
}

/* AI Guide Page Specific Styles */
.ai-guide-hero {
    padding-top: 120px;
}

.guide-intro {
    padding: var(--section-padding) 0;
}

.intro-description {
    font-size: 1.2rem;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 3rem;
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.learning-path-card {
    background: rgba(156, 163, 175, 0.1);
    border: 2px solid var(--accent-teal);
    border-radius: var(--border-radius-large);
    padding: 2rem;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.learning-path-card h3 {
    color: var(--accent-teal);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.learning-path-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.paper-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-gray);
    border-radius: var(--border-radius-large);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.paper-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-dark);
    border-color: var(--accent-teal);
}

.paper-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-teal);
    transition: width 0.3s ease;
}

.paper-card:hover::before {
    width: 6px;
}

.paper-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.paper-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-teal), var(--accent-purple));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-light);
}

.paper-meta {
    flex: 1;
}

.paper-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.3;
    margin: 0 0 0.5rem 0;
    text-decoration: none;
    transition: color 0.2s ease;
    display: block;
}

.paper-title:hover {
    color: var(--accent-teal);
}

.difficulty-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.difficulty-badge.foundation {
    background: rgba(76, 175, 80, 0.2);
    color: #4caf50;
}

.difficulty-badge.beginner {
    background: rgba(76, 175, 80, 0.2);
    color: #4caf50;
}

.difficulty-badge.intermediate {
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

.difficulty-badge.advanced {
    background: rgba(244, 67, 54, 0.2);
    color: #f44336;
}

.paper-authors {
    font-size: 0.9rem;
    color: var(--text-gray);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.paper-venue {
    font-size: 0.85rem;
    color: var(--accent-teal);
    font-weight: 600;
    font-style: italic;
}

.paper-description {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    text-align: justify;
}

.paper-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.paper-tag {
    background: rgba(156, 163, 175, 0.1);
    color: var(--accent-teal);
    padding: 0.25rem 0.75rem;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid rgba(156, 163, 175, 0.2);
    transition: all 0.2s ease;
}

.paper-tag:hover {
    background: rgba(156, 163, 175, 0.2);
    transform: translateY(-1px);
}

.paper-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.paper-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-gray);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-gray);
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
}

.paper-link:hover {
    background: var(--accent-teal);
    color: var(--primary-navy);
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

.paper-link i {
    font-size: 0.9rem;
}

.advanced-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.advanced-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    text-align: center;
    transition: var(--transition);
}

.advanced-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-dark);
}

.advanced-icon {
    font-size: 2.5rem;
    color: var(--accent-teal);
    margin-bottom: 1rem;
}

.advanced-card h3 {
    color: var(--text-white);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.advanced-card p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.advanced-link {
    color: var(--accent-teal);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

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

.advanced-intro {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Publications Page Specific Styles */
.research-hero {
    padding-top: 120px;
}

.featured-publications {
    padding: var(--section-padding) 0;
}

.featured-publication {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-gray);
    border-radius: var(--border-radius-large);
    padding: 2rem;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.featured-badge {
    position: absolute;
    top: -1px;
    right: 2rem;
    background: var(--accent-teal);
    color: var(--primary-navy);
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.featured-header {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
    align-items: center;
    margin-bottom: 2rem;
}

.featured-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius);
    border: 2px solid var(--accent-teal);
}

.featured-title {
    font-size: 2rem;
    color: var(--text-white);
    margin-bottom: 0.5rem;
}

.featured-subtitle {
    font-size: 1.2rem;
    color: var(--accent-teal);
    margin-bottom: 1.5rem;
}

.featured-description p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.featured-description strong {
    color: var(--text-white);
}

.featured-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
}

.featured-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-gray);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-white);
    font-weight: 600;
    transition: var(--transition);
}

.featured-link:hover {
    background: var(--accent-teal);
    color: var(--primary-navy);
    transform: translateY(-2px);
}

.featured-visual {
    text-align: center;
    margin-top: 2rem;
}

.research-diagram {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-dark);
}

.publications-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.publications-intro p {
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 800px;
    margin: 0 auto;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.stat-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-gray);
    text-align: center;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-teal);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-gray);
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

.publication-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-gray);
    border-radius: var(--border-radius-large);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.publication-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-dark);
    border-color: var(--accent-teal);
}

.publication-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-teal);
    transition: width 0.3s ease;
}

.publication-card:hover::before {
    width: 6px;
}

.publication-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.publication-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-teal), var(--accent-purple));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-light);
}

.publication-meta {
    flex: 1;
}

.publication-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.3;
    margin: 0 0 0.5rem 0;
    text-decoration: none;
    transition: color 0.2s ease;
    display: block;
}

.publication-title:hover {
    color: var(--accent-teal);
}

.publication-authors {
    font-size: 0.9rem;
    color: var(--text-gray);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.publication-authors strong {
    color: var(--text-white);
}

.publication-venue {
    font-size: 0.8rem;
    color: var(--accent-teal);
    font-weight: 600;
    font-style: italic;
}

.publication-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    text-align: justify;
}

.publication-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.publication-tag {
    background: rgba(156, 163, 175, 0.1);
    color: var(--accent-teal);
    padding: 0.25rem 0.75rem;
    border-radius: 16px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(156, 163, 175, 0.2);
    transition: all 0.2s ease;
}

.publication-tag:hover {
    background: rgba(156, 163, 175, 0.2);
    transform: translateY(-1px);
}

.publication-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-gray);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-gray);
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
}

.publication-link:hover {
    background: var(--accent-teal);
    color: var(--primary-navy);
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

.publication-link i {
    font-size: 0.9rem;
}

/* Responsive adjustments for AI Guide and Publications pages */
@media (max-width: 768px) {
    .papers-grid,
    .publications-grid {
        grid-template-columns: 1fr;
    }

    .paper-card,
    .publication-card {
        padding: 1.5rem;
    }

    .featured-header {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .featured-image {
        max-width: 300px;
        margin: 0 auto;
    }

    .advanced-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .ai-guide-hero,
    .research-hero {
        padding-top: 100px;
    }
}