:root {
    --pumpkin: #fc750d;
    --safety-orange: #f78128;
    --ruddy-blue: #66a7d9;
    --argentinian-blue: #5cb6fa;
    --lapis-lazuli: #2b6999;
    --ghost-white: #fafbff;
    
    --primary: var(--pumpkin);
    --secondary: var(--ruddy-blue);
    --accent: var(--lapis-lazuli);
    --background: var(--ghost-white);
    --surface: #ffffff;
    --surface-tertiary: #f0f4ff;
    --text-primary: var(--lapis-lazuli);
    --text-secondary: #4a6b85;
    --text-tertiary: #7090a8;
    --border: #e0ebf5;
    --shadow: 0 4px 6px -1px rgba(43, 105, 153, 0.08);
    --radius: 0.75rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

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

img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; }
a { text-decoration: none; color: inherit; }

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 8px;
    background: var(--surface);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: var(--radius);
    z-index: 1000;
    transition: top 0.3s;
}
.skip-link:focus { top: 8px; }

.nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(43, 105, 153, 0.08);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    min-height: 70px;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a .material-icons {
    font-size: 1rem;
    opacity: 0.8;
    margin-left: 0.125rem;
    vertical-align: middle;
    line-height: 1;
}

.nav-register {
    background: var(--primary) !important;
    color: white !important;
    padding: 0.75rem 1.5rem !important;
    border-radius: var(--radius) !important;
    font-weight: 600 !important;
    font-size: 0.95rem !important;
    box-shadow: 0 2px 4px rgba(252, 117, 13, 0.2);
}

.nav-register:hover {
    background: var(--safety-orange) !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 8px rgba(252, 117, 13, 0.3) !important;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
}

.header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #06b6d4 100%);
    color: white;
    padding: 3rem 0 2rem 0;
    position: relative;
    overflow: hidden;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.header-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: center;
}

.header-text {
    max-width: 600px;
}

.header h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.header-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    line-height: 1.6;
    opacity: 0.9;
}

.event-meta {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.meta-icon {
    width: 20px;
    height: 20px;
    opacity: 0.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.header-tagline {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.header-tagline p {
    font-size: 1.125rem;
    opacity: 0.8;
    margin: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    border-radius: var(--radius);
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: #e56b0f;
    color: white;
    box-shadow: var(--shadow);
    font-weight: 700;
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    box-shadow: 0 8px 25px rgba(229, 107, 15, 0.4);
    
    transform: translateZ(0);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.btn-primary:hover {
    background: var(--safety-orange);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(229, 107, 15, 0.3);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}


.live-cta-subtext {
    margin-top: 1rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
}


.speaker-carousel {
    width: 300px;
    height: 500px;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.carousel-container {
    height: 100%;
    position: relative;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    animation: scroll-up 30s linear infinite;
}

.carousel-speaker {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    transition: var(--transition);
    min-height: 70px;
    flex-shrink: 0;
}

.carousel-speaker:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(4px);
}

.carousel-speaker-image {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
}

.carousel-speaker-fallback {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.carousel-speaker-info {
    min-width: 0;
    flex: 1;
}

.carousel-speaker-name {
    font-weight: 600;
    color: white;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    line-height: 1.3;
}

.carousel-speaker-title {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@keyframes scroll-up {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-50%);
    }
}

.carousel-track:hover {
    animation-play-state: paused;
}

.section {
    padding: 3rem 0;
}

.section-content {
    margin-bottom: 2.5rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.agenda-container {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border);
}

.filters {
    background: var(--surface-tertiary);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

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

.timezone-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.filter-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-label {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
}

.filter-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background: var(--surface);
    color: var(--text-primary);
    min-width: 120px;
    font-size: 0.875rem;
    height: 38px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url('data:image/svg+xml;charset=UTF-8,%3Csvg%20width%3D%2214%22%20height%3D%228%22%20viewBox%3D%220%200%2014%208%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Cpath%20d%3D%22M1%201l6%206%206-6%22%20stroke%3D%22%23637588%22%20stroke-width%3D%222%22%20fill%3D%22none%22%20fill-rule%3D%22evenodd%22%2F%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 0.7rem center;
    background-size: 14px;
    padding-right: 2.5rem;
}

.clear-filters {
    padding: 0.5rem 1rem;
    background: var(--border);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    height: 38px;
}

.clear-filters:hover {
    background: var(--text-secondary);
    color: white;
    border-color: var(--text-secondary);
}

.clear-filters[data-active="true"] {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.timezone-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    min-width: 200px;
}

.timezone-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    height: 38px;
    min-width: 56px;
}

.timezone-btn.active,
.timezone-btn:hover {
    border-color: var(--secondary);
    background: var(--secondary);
    color: white;
}

.schedule {
    padding: 1rem;
}

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

.day-header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding-bottom: 0.75rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border);
}

.day-header {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    border: none;
    display: inline-block;
}

.day-stream-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 99px;
    background-color: rgba(252, 117, 13, 0.1);
    transition: var(--transition);
    white-space: nowrap;
}

.day-stream-link:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(252, 117, 13, 0.3);
}

.day-stream-link .material-icons {
    font-size: 1rem;
    margin-left: -0.125rem;
    transition: transform 0.2s ease;
}

.day-stream-link:hover .material-icons {
    transform: translateX(2px);
}

.session {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: var(--transition);
    -webkit-tap-highlight-color: transparent;
}

.session:hover {
    border-color: var(--secondary);
    box-shadow: var(--shadow);
}

.session-header {
    cursor: pointer;
    transition: var(--transition);
    padding: 1.5rem;
}

.session-header:hover {
    background: var(--surface-tertiary);
}

.session.expanded .session-header {
    border-bottom: 1px solid var(--border);
    background: var(--surface-tertiary);
}

.session-mobile-layout {
    display: none;
}

.session-desktop-layout {
    display: grid;
    grid-template-columns: 90px 1fr auto 48px;
    gap: 1rem;
    align-items: center;
    width: 100%;
    position: relative;
}

.session-desktop-layout .session-time {
    font-weight: 600;
    color: var(--secondary);
    font-size: 1.125rem;
    white-space: nowrap;
    min-width: 70px;
    text-align: center;
}

.session-desktop-layout .session-content {
    min-width: 0;
}

.session-desktop-layout .session-title {
    font-weight: 600;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    font-size: 1.125rem;
}

.session-desktop-layout .session-expand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--surface-tertiary);
    color: var(--text-secondary);
    transition: var(--transition);
    flex-shrink: 0;
}

.session-desktop-layout .session-expand-icon:hover {
    background: var(--secondary);
    color: white;
}

.session-desktop-layout .session-expand-icon svg {
    transition: transform 0.3s ease;
}

.session-meta-inline {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.session-meta-inline .meta-separator {
    color: var(--border);
    font-weight: 300;
}

.session-language,
.session-type {
    font-weight: 500;
    text-transform: capitalize;
}

.session-language {
    color: var(--secondary);
}

.session-type {
    color: var(--primary);
}

.badge {
    padding: 0.175rem 0.35rem;
    border-radius: 0.25rem;
    font-size: 0.625rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    display: inline-flex;
    align-items: center;
    transition: var(--transition);
}

.badge-topic {
    background: rgba(43, 105, 153, 0.08);
    color: var(--lapis-lazuli);
    border: 1px solid rgba(43, 105, 153, 0.15);
}

.badge-language,
.badge-type {
    display: none;
}

.badge:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.session:hover .session-meta-inline {
    color: var(--text-secondary);
}

.session:hover .session-language {
    color: var(--argentinian-blue);
}

.session:hover .session-type {
    color: var(--safety-orange);
}

.session-meta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.session-badges-primary {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.session-badges-topics {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 0.75rem;
}

.session-badges {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.badge-compact {
    width: 28px;
    height: 28px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0;
    position: relative;
    cursor: help;
}

.badge-compact::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    margin-bottom: 0.25rem;
}

.badge-compact:hover::after {
    opacity: 1;
}

.speakers-list {
    display: flex;
    gap: -0.5rem;
    position: relative;
}

.speakers-list > * {
    position: relative;
    z-index: 1;
}

.speakers-list > *:hover {
    z-index: 2;
}

.speaker-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--surface);
    object-fit: cover;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.speaker-avatar:hover {
    border-color: var(--primary);
    transform: scale(1.1);
}

.speaker-fallback {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fc750d, #ffb366);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.speaker-fallback:hover {
    transform: scale(1.1);
}

.session-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.session-details-content {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--background);
}

.session-details .session-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    white-space: pre-line;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    overflow: visible;
}

.session-speakers-info h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.session-speakers-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.session-speaker-detail {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--surface);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.session-speaker-detail:hover {
    background: var(--surface-tertiary);
    border-color: var(--secondary);
    transform: translateY(-1px);
}

.session-speaker-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border);
    flex-shrink: 0;
}

.session-speaker-fallback {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.session-speaker-info {
    flex: 1;
    min-width: 0;
}

.session-speaker-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.session-speaker-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.4;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.speaker-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    -webkit-tap-highlight-color: transparent;
}

.speaker-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 35px rgba(43, 105, 153, 0.2);
    border-color: var(--argentinian-blue);
}

.speaker-image {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #e0ebf5;
    flex-shrink: 0;
}

.speaker-card-fallback {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fc750d, #ffb366);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.speaker-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    text-align: center;
}

.speaker-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.speaker-title {
    color: var(--text-secondary);
    font-size: 0.825rem;
    margin-bottom: 1rem;
    line-height: 1.4;
    opacity: 0.85;
}

.speaker-social {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
}

.speaker-social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--surface-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
    border: 1px solid transparent;
}

.speaker-social-link:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(252, 117, 13, 0.3);
    border-color: var(--primary);
}

.speaker-social-link svg {
    width: 18px;
    height: 18px;
}

.load-more-container {
    text-align: center;
    margin-top: 2rem;
    padding: 2rem 0;
}

.load-more-btn {
    position: relative;
    overflow: hidden;
}

.speakers-count {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-left: 0.5rem;
    font-weight: 400;
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.modal-content {
    background: var(--surface);
    border-radius: 1.5rem;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    position: relative;
    transform: scale(0.8) translateY(3rem);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

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

.modal-header {
    position: relative;
    padding: 1rem;
    display: flex;
    justify-content: flex-end;
    background: none;
    height: auto;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-tertiary);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 1.125rem;
    border: 1px solid var(--border);
}

.modal-close:hover {
    background: var(--border);
    color: var(--text-primary);
    transform: scale(1.1);
}

.modal-body {
    padding: 2rem;
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}

.speaker-profile {
    text-align: center;
    position: relative;
}

.speaker-profile-image {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    border: 3px solid var(--border);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.speaker-profile-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.speaker-profile-title {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
    line-height: 1.5;
}

.java-champion-badge {
    display: inline-flex;
    align-items: center;
    margin-left: 0.5rem;
    padding: 0.125rem 0.375rem;
    background: linear-gradient(135deg, var(--primary), var(--safety-orange));
    color: white;
    border-radius: 0.25rem;
    font-size: 0.625rem;
    font-weight: 600;
    vertical-align: middle;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.speaker-bio {
    text-align: left;
    line-height: 1.7;
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    max-height: 200px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-link {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--surface-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
    border: 2px solid transparent;
}

.social-link:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    border-color: var(--primary);
    box-shadow: 0 8px 25px rgba(252, 117, 13, 0.3);
}

.sponsors-section {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 2.5rem 0;
    box-shadow: 0 2px 4px rgba(43, 105, 153, 0.05);
}

.sponsors-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.sponsor-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.sponsor-label {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    margin: 0;
    text-align: center;
}

.logo-link {
    display: inline-block;
    transition: var(--transition);
    position: relative;
}

.logo-link:hover {
    transform: translateY(-4px);
}

.logo-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.logo-link:hover::after {
    transform: scaleX(1);
}

.organizer-logo {
    max-width: 180px;
    height: auto;
    filter: grayscale(100%);
    opacity: 0.9;
    transition: var(--transition);
    display: block;
}

.logo-link:hover .organizer-logo {
    filter: grayscale(0%);
    opacity: 1;
}

.supporter-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    flex-wrap: wrap;
}

.supporter-logo {
    max-height: 50px;
    max-width: 140px;
    height: auto;
    width: auto;
    filter: grayscale(100%);
    opacity: 0.8;
    transition: var(--transition);
}

.logo-link:hover .supporter-logo {
    filter: grayscale(0%);
    opacity: 1;
}

.footer {
    background: #ffffff;
    padding: 2rem 0;
    border-top: 1px solid var(--border);
}

.footer-bottom {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: center;
}



.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    color: var(--text-secondary);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.error {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    color: #dc2626;
    margin: 2rem auto;
    max-width: 500px;
}

.error-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.error-message {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.error-action {
    margin-top: 1.5rem;
}

.error .btn {
    background: #dc2626;
    color: white;
}

.error .btn:hover {
    background: #b91c1c;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

@media (max-width: 1024px) {
    .speakers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filter-row {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .timezone-section,
    .filter-section {
        justify-content: center;
    }
}

@media (max-width: 900px) {
    .sponsors-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--surface);
        flex-direction: column;
        gap: 0;
        padding: 2rem 0;
        border-top: 1px solid var(--border);
        transform: translateX(100%);
        visibility: hidden;
        transition: transform 0.3s ease;
        overflow-y: auto;
        z-index: 99;
        box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        transform: translateX(0);
        visibility: visible;
    }
    
    .nav-links a {
        padding: 1rem 2rem;
        width: 100%;
        text-align: center;
    }
    
    .nav-register {
        margin: 0.5rem 2rem !important;
        text-align: center !important;
    }
    
    .header {
        padding: 2rem 0;
    }
    
    .header-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .speaker-carousel {
        width: 100%;
        max-width: 100vw;
        height: auto;
        min-height: 120px;
        order: -1;
        margin: 0 -1rem 1rem -1rem;
        padding: 0;
    }
    
    .carousel-container {
        height: auto;
        padding: 0.75rem;
    }
    
    .carousel-track {
        flex-direction: row;
        gap: 0.75rem;
        padding: 0;
        animation: scroll-left 25s linear infinite;
    }
    
    .carousel-speaker {
        min-width: 140px;
        max-width: 160px;
        padding: 0.5rem;
        background: rgba(255, 255, 255, 0.15);
    }
    
    @keyframes scroll-left {
        0% { transform: translateX(0); }
        100% { transform: translateX(-50%); }
    }
    
    .section {
        padding: 2rem 0;
    }
    
    .sponsors-section {
        padding: 2rem 0;
    }
    
    .sponsor-label {
        font-size: 0.9375rem;
    }
    
    .organizer-logo {
        max-width: 150px;
    }
    
    .supporter-logos {
        gap: 1.5rem;
    }
    
    .supporter-logo {
        max-height: 40px;
        max-width: 100px;
    }
    
    .agenda-container {
        box-shadow: none;
        border-radius: 0;
        margin: 0 -1rem;
        border: none;
    }
    
    .filters {
        padding: 1rem;
        margin-bottom: 1rem;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
    }
    
    .schedule {
        padding: 0;
    }
    
    .day-group {
        margin-bottom: 1.5rem;
    }
    
    .day-header-container {
        background: var(--surface-tertiary);
        padding: 0.75rem 1rem;
        margin: 0 -0.5rem;
        position: sticky;
        top: 70px;
        z-index: 10;
        border-bottom: 1px solid var(--border);
        gap: 0.75rem;
    }
    
    .day-header {
        font-size: 1rem;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0;
        padding: 0;
        background: none;
        border: none;
        position: static;
        display: inline-block;
        width: auto;
    }
    
    .day-stream-link {
        font-size: 0.8125rem;
        padding: 0.375rem 0.75rem;
        gap: 0.25rem;
    }
    
    .day-stream-link .material-icons {
        font-size: 0.875rem;
    }
    
    .session-mobile-layout {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
    }
    
    .session-desktop-layout {
        display: none;
    }
    
    .session {
        margin: 0.5rem;
        border-radius: 0.5rem;
        width: 100%;
    }
    
    .session-header {
        padding: 1rem;
    }
    
    .session-mobile-header {
        display: flex;
        justify-content: space-between;
        align-items: baseline;
        width: 100%;
        margin-bottom: 0.75rem;
    }
    
    .session-mobile-layout .session-time {
        font-size: 0.9375rem;
        font-weight: 700;
        color: var(--secondary);
        white-space: nowrap;
    }
    
    .session-meta-mobile {
        font-size: 0.75rem;
        color: var(--text-tertiary);
        font-weight: 500;
        text-transform: lowercase;
        white-space: nowrap;
    }
    
    .session-mobile-layout .session-content {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        width: 100%;
        gap: 1rem;
    }
    
    .session-info {
        flex: 1;
        min-width: 0;
    }
    
    .session-speaker-name {
        font-size: 0.875rem;
        color: var(--text-secondary);
        margin-bottom: 0.25rem;
    }
    
    .session-mobile-layout .session-title {
        font-size: 1.0625rem;
        margin: 0;
        line-height: 1.35;
        font-weight: 600;
        color: var(--text-primary);
        word-wrap: break-word;
        overflow-wrap: break-word;
        display: block;
    }
    
    .session-topics {
        display: flex;
        gap: 0.375rem;
        flex-wrap: wrap;
        margin-top: 0.5rem;
    }
    
    .session-topics .badge {
        font-size: 0.625rem;
        padding: 0.125rem 0.375rem;
    }
    
    .session-mobile-layout .session-expand-icon {
        width: 32px;
        height: 32px;
        background: var(--surface-tertiary);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        margin-top: 0.25rem;
    }
    
    .session-mobile-layout .session-expand-icon svg {
        width: 18px;
        height: 18px;
        color: var(--text-secondary);
        transition: transform 0.3s ease;
    }
    
    .session.expanded .session-mobile-layout .session-expand-icon {
        background: var(--secondary);
        color: white;
    }
    
    .session.expanded .session-mobile-layout .session-expand-icon svg {
        transform: rotate(180deg);
        color: white;
    }
    
    .session-mobile-layout .session-badges-primary {
        display: flex;
        gap: 0.375rem;
        flex-shrink: 0;
        align-items: center;
    }
    
    .session-mobile-layout .badge {
        font-size: 0.625rem;
        padding: 0.125rem 0.375rem;
        font-weight: 500;
        text-transform: uppercase;
        letter-spacing: 0.02em;
        border-radius: 0.25rem;
        white-space: nowrap;
    }
    
    .session-mobile-layout .badge::before {
        display: none;
    }
    
    .session-badges {
        display: flex;
        gap: 0.375rem;
        flex-shrink: 0;
        align-items: center;
    }
    
    .session-details-content {
        padding: 1rem;
    }
    
    .speakers-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        min-height: 44px;
    }
    
    .filter-section {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .filter-select {
        min-height: 44px;
        width: 100%;
        font-size: 16px;
    }
    
    .clear-filters {
        min-height: 44px;
        width: 100%;
    }
    
    .timezone-buttons {
        gap: 0.25rem;
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .modal {
        padding: 0;
    }
    
    .modal-content {
        margin: 0;
        max-height: 100vh;
        max-width: 100%;
        border-radius: 0;
        width: 100%;
    }
    
    .modal-body {
        max-height: calc(100vh - 80px);
        padding: 1.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

button:focus-visible,
a:focus-visible,
select:focus-visible {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}

.session:focus-visible {
    outline: 2px solid var(--secondary);
    outline-offset: -2px;
}

.section-description a.inline-link {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.section-description a.inline-link:hover {
  color: var(--safety-orange);
}

.inline-link-icon {
  font-size: 1em;
  position: relative;
  top: -1px;
}

:target {
    animation: highlight 2s ease-out;
}

@keyframes highlight {
    0% {
        background-color: rgba(252, 117, 13, 0.2);
        box-shadow: 0 0 0 4px rgba(252, 117, 13, 0.3);
    }
    100% {
        background-color: transparent;
        box-shadow: none;
    }
}

.session:target {
    border-color: var(--primary);
    background: var(--surface-tertiary);
}

.speaker-card:target {
    border-color: var(--primary);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 35px rgba(252, 117, 13, 0.3);
}

.day-group:target .day-header {
    background: linear-gradient(90deg, rgba(252, 117, 13, 0.1) 0%, transparent 100%);
    border-left: 4px solid var(--primary);
    padding-left: calc(1rem - 4px);
}