/* MIT Media Lab Inspired Styles for Speakers Page - Dark Theme */

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

/* Improve touch interactions on mobile */
.speaker-card {
    -webkit-tap-highlight-color: transparent;
    touch-action: auto;
}

.social-link {
    -webkit-tap-highlight-color: transparent;
    touch-action: auto;
}

.nav__link--active {
    color: var(--accent-cyan) !important;
    position: relative;
}

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-cyan);
}

/* Speakers Hero - MIT Media Lab Dark Style */
.speakers-hero {
    min-height: 70vh;
    background: var(--primary-dark);
    display: flex;
    align-items: center;
    position: relative;
    padding: var(--space-24) 0;
    margin-top: 70px;
    overflow: hidden;
}

.speakers-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    opacity: 1;
    pointer-events: none;
}

.speakers-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle, rgba(255, 255, 255, 0.7) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.4) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
    background-size: 
        3px 3px, 
        7px 7px, 
        13px 13px;
    background-position: 
        0 0, 
        2px 2px, 
        5px 5px;
    opacity: 0.5;
    animation: grain 9s steps(12) infinite;
    z-index: 1;
    pointer-events: none;
}

.speakers-hero__content {
    position: relative;
    z-index: 3;
}

.speakers-hero__subtitle {
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--accent-cyan);
    margin-bottom: var(--space-3);
    display: block;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.speakers-hero__main-title {
    font-size: clamp(4rem, 10vw, 12rem);
    font-weight: 900;
    color: var(--text-primary);
    line-height: 0.75;
    margin-bottom: var(--space-8);
    display: block;
    letter-spacing: -0.05em;
    text-transform: uppercase;
    text-shadow: 3px 3px 0px rgba(0, 0, 0, 0.4);
    font-family: 'Inter', sans-serif;
}

.speakers-hero__description {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    max-width: 700px;
    line-height: 1.7;
    margin-bottom: var(--space-10);
    font-weight: 300;
}

/* Floating Elements - MIT Style */
.speakers-hero__visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    z-index: 1;
}

.floating-elements {
    position: relative;
    width: 100%;
    height: 100%;
}

.floating-element {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary-blue), var(--accent-green));
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
    pointer-events: none;
}

.floating-element--1 {
    width: 200px;
    height: 200px;
    top: 10%;
    right: 20%;
    animation-delay: 0s;
}

.floating-element--2 {
    width: 120px;
    height: 120px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-green));
}

.floating-element--3 {
    width: 80px;
    height: 80px;
    top: 30%;
    right: 60%;
    animation-delay: 4s;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-gold));
}

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

/* MIT Media Lab Grid Style for Speakers - Dark Theme */
.speakers-grid {
    padding: var(--space-24) 0;
    background: var(--secondary-dark);
    position: relative;
}

.speakers-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle, rgba(255, 255, 255, 0.5) 0.5px, transparent 0.5px),
        radial-gradient(circle, rgba(255, 255, 255, 0.3) 1px, transparent 1px);
    background-size: 
        4px 4px,
        9px 9px;
    background-position: 
        1px 1px,
        4px 4px;
    opacity: 0.2;
    animation: grain 7s steps(10) infinite reverse;
    pointer-events: none;
}

.speaker-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    margin-bottom: var(--space-10);
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: var(--space-6);
    align-items: start;
    transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
    padding: var(--space-6);
    border-radius: 0;
    position: relative;
}

.speaker-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0; /* hide left accent bar for cleaner look */
    background: transparent;
    transition: none;
}

.speaker-card:hover::before { /* remove heavy left accent */ width: 0; }

.speaker-card:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: none;
    border-color: var(--accent-cyan);
}

.speaker-card__image {
    position: relative;
    width: 240px;
    height: 240px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
}

.speaker__photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) brightness(0.95);
    transition: filter 0.3s ease, transform 0.3s ease;
}

.speaker-card:hover .speaker__photo {
    filter: grayscale(0%) brightness(1);
    transform: scale(1.02);
}

.speaker-card__overlay { display: none !important; }

.speaker-card__social {
    display: flex;
    gap: var(--space-5);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 0;
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: all 0.3s ease;
    transform: translateY(20px);
    opacity: 0;
    backdrop-filter: blur(10px);
}

.speaker-card:hover .social-link {
    transform: translateY(0);
    opacity: 1;
}

.speaker-card:hover .social-link:nth-child(1) { transition-delay: 0.1s; }
.speaker-card:hover .social-link:nth-child(2) { transition-delay: 0.2s; }
.speaker-card:hover .social-link:nth-child(3) { transition-delay: 0.3s; }

.social-link:hover {
    background: var(--white);
    color: var(--accent-blue);
    transform: translateY(0) scale(1.1);
    border-color: var(--white);
}

.speaker-card__content {
    padding: 0;
    position: relative;
    z-index: 2;
}

.speaker-card__name {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    line-height: 1.2;
    text-transform: none;
    letter-spacing: 0;
}

.speaker-card__title {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-4);
    text-transform: none;
    letter-spacing: 0;
    word-break: break-word;
    hyphens: auto;
}

.speaker-card__description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
    font-weight: 300;
    word-break: break-word;
    hyphens: auto;
}

.speaker-card__expertise {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.expertise-tag {
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent-blue);
    padding: var(--space-2) var(--space-5);
    border-radius: 0;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border: 1px solid var(--accent-blue);
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    backdrop-filter: blur(5px);
}

.expertise-tag:hover {
    background: var(--accent-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.speaker-card__expand {
    background: transparent;
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    padding: var(--space-4) var(--space-8);
    border-radius: 0;
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    backdrop-filter: blur(5px);
}

.speaker-card__expand:hover {
    background: var(--accent-cyan);
    color: var(--primary-dark);
    transform: translateX(5px);
}

.speaker-card__expand i {
    transition: transform 0.3s ease;
}

.speaker-card__expand:hover i {
    transform: rotate(180deg);
}

/* Speaker Details - MIT Style Modal */
.speaker-details {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    display: none;
    overflow-y: auto;
    padding: var(--space-8);
}

.speaker-details.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.speaker-details__content {
    background: var(--white);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    border-radius: 0;
    animation: slideInUp 0.3s ease;
}

.speaker-details__header {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-8);
    padding: var(--space-12);
    border-bottom: 4px solid var(--secondary-blue);
    background: var(--gray-50);
}

.speaker-details__photo {
    width: 100%;
    height: 200px;
    object-fit: cover;
    filter: grayscale(0%);
}

.speaker-details__info h2 {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
    line-height: 1.1;
}

.speaker-details__position {
    font-size: var(--font-size-lg);
    color: var(--secondary-blue);
    font-weight: 600;
    margin-bottom: var(--space-6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.speaker-details__social {
    display: flex;
    gap: var(--space-3);
}

.speaker-details__social .social-link {
    width: 45px;
    height: 45px;
    font-size: var(--font-size-base);
    opacity: 1;
    transform: none;
}

.speaker-details__bio,
.speaker-details__research,
.speaker-details__talk {
    padding: var(--space-8) var(--space-12);
    border-bottom: 1px solid var(--gray-200);
}

.speaker-details__bio h3,
.speaker-details__research h3,
.speaker-details__talk h3 {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.speaker-details__bio p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.speaker-details__research ul {
    list-style: none;
    padding: 0;
}

.speaker-details__research li {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-2);
    padding-left: var(--space-6);
    position: relative;
}

.speaker-details__research li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--secondary-blue);
    font-weight: 700;
}

.talk-info h4 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--space-3);
}

.talk-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.talk-meta {
    display: flex;
    gap: var(--space-6);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.talk-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.speaker-details__close {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    background: var(--gray-900);
    color: var(--white);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: var(--font-size-lg);
    transition: all 0.3s ease;
    z-index: 10;
}

.speaker-details__close:hover {
    background: var(--secondary-blue);
    transform: scale(1.1);
}

/* CTA Section - MIT Dark Style */
.speakers-cta {
    padding: var(--space-24) 0;
    background: var(--primary-dark);
    color: var(--text-primary);
    text-align: center;
    position: relative;
}

.speakers-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.15) 0%, transparent 60%);
    opacity: 0.8;
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-size: var(--font-size-6xl);
    font-weight: 900;
    margin-bottom: var(--space-6);
    line-height: 0.8;
    text-transform: uppercase;
    letter-spacing: -0.03em;
    font-family: 'Inter', sans-serif;
    text-shadow: 2px 2px 0px rgba(0, 0, 0, 0.4);
}

.cta-content p {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: var(--space-10);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 300;
    line-height: 1.6;
}

.btn--large {
    padding: var(--space-6) var(--space-12);
    font-size: var(--font-size-base);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Responsive Design - Maintain desktop layout on mobile */
@media (max-width: 768px) {
    .speakers-hero,
    .speakers-cta,
    .speakers-grid {
        touch-action: auto;
        overscroll-behavior: auto;
    }

    .speakers-hero {
        min-height: unset;
        padding: var(--space-12) 0 var(--space-16);
    }

    .speakers-hero__visual {
        display: none;
    }

    .speakers-hero .container {
        display: flex;
        flex-direction: column;
        gap: var(--space-6);
        align-items: flex-start;
    }

    .speakers-hero__subtitle,
    .speakers-hero__description {
        text-align: left;
        max-width: 100%;
    }

    .speakers-hero__main-title {
        font-size: clamp(2.25rem, 9vw, 3.5rem);
        line-height: 1;
        margin-bottom: var(--space-4);
    }

    .speakers-hero__description {
        font-size: var(--font-size-base);
        line-height: 1.6;
        margin-bottom: var(--space-4);
    }

    .speakers-grid {
        padding: var(--space-16) 0;
    }

    .speakers-grid .container {
        display: flex;
        flex-direction: column;
        gap: var(--space-6);
    }

    .speaker-card {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        padding: var(--space-4);
    }

    .speaker-card__image {
        width: 100%;
        max-width: 260px;
        height: auto;
        aspect-ratio: 1 / 1;
        margin: 0 auto;
    }

    .speaker-card__content {
        padding: 0;
    }

    .speaker-card__expertise {
        gap: var(--space-2);
    }

    .speakers-cta {
        padding: var(--space-16) 0;
    }

    .cta-content h2 {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
        line-height: 1.05;
        margin-bottom: var(--space-4);
    }

    .cta-content p {
        font-size: var(--font-size-base);
        line-height: 1.55;
        margin-bottom: var(--space-6);
        padding: 0 var(--space-2);
    }

    .btn--large {
        width: 100%;
        max-width: 380px;
    }
}
 
/* Small mobile devices */
@media (max-width: 480px) {
    .speakers-grid {
        padding: var(--space-12) 0;
    }
    
    .speakers-grid .container {
        padding: 0 var(--space-3);
    }
    
    .speaker-card {
        padding: var(--space-4);
        gap: var(--space-3);
    }

    .speaker-card__image {
        width: 70%;
        max-width: 220px;
        aspect-ratio: 1 / 1;
    }

    .speaker-card__name {
        font-size: var(--font-size-xl);
        margin-bottom: var(--space-2);
    }

    .speaker-card__title {
        font-size: var(--font-size-sm);
        margin-bottom: var(--space-2);
    }

    .speaker-card__description {
        font-size: var(--font-size-sm);
        line-height: 1.5;
        margin-bottom: var(--space-3);
    }

    .social-link {
        width: 36px;
        height: 36px;
        font-size: var(--font-size-sm);
    }

    .speaker-card__expertise {
        gap: var(--space-2);
    }

    .expertise-tag {
        font-size: 11px;
        padding: 6px 10px;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .speakers-grid .container {
        padding: 0 var(--space-2);
    }
    
    .speaker-card {
        padding: var(--space-3);
        gap: var(--space-3);
    }
    
    .speaker-card__image {
        width: 75%;
        max-width: 200px;
        aspect-ratio: 1 / 1;
    }
    
    .speaker-card__name {
        font-size: var(--font-size-lg);
        line-height: 1.15;
    }
    
    .speaker-card__title {
        font-size: var(--font-size-xs);
    }
    
    .speaker-card__description {
        font-size: var(--font-size-xs);
        line-height: 1.45;
    }
    
    .social-link {
        width: 32px;
        height: 32px;
        font-size: 12px;
    }
    
    .speaker-details__content {
        margin: var(--space-4);
        max-height: calc(100vh - 2rem);
    }
    
    .speaker-details__header {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        padding: var(--space-8);
        text-align: center;
    }
    
    .speaker-details__photo {
        height: 250px;
        width: 200px;
        margin: 0 auto;
    }
    
    .cta-content h2 {
        font-size: var(--font-size-3xl);
    }
    
    .cta-content p {
        font-size: var(--font-size-base);
    }
}

/* Animations */
@keyframes slideInUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -5%); }
    20% { transform: translate(-10%, 5%); }
    30% { transform: translate(5%, -10%); }
    40% { transform: translate(-5%, 15%); }
    50% { transform: translate(-10%, 5%); }
    60% { transform: translate(15%, 0); }
    70% { transform: translate(0, 10%); }
    80% { transform: translate(-15%, 0); }
    90% { transform: translate(10%, 5%); }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    .floating-element {
        animation: none;
    }
    
    .speaker-card,
    .speaker__photo,
    .social-link {
        transition: none;
    }
}