@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* ===================================
       COLOR SYSTEM
       =================================== */
    
    /* Primary Colors */
    --color-background: #231f20;
    --color-accent: #ff9800;
    --color-accent-rgb: 255, 152, 0;
    
    /* Neutral Colors */
    --color-text-primary: #f5f5f5;
    --color-text-bright: rgba(245, 245, 247, 0.9);
    --color-text-secondary: rgba(244, 244, 244, 0.96);
    --color-text-standard: rgba(244, 244, 244, 0.78);
    --color-text-muted: rgba(235, 233, 230, 0.78);
    --color-text-subtle: rgba(235, 233, 230, 0.68);
    --color-text-faint: rgba(235, 233, 230, 0.58);
    --color-gray: #888888;
    
    /* Accent Text Colors (orange/warm tones) */
    --color-accent-text: rgba(255, 210, 153, 0.9);
    --color-accent-text-muted: rgba(255, 210, 153, 0.86);
    --color-accent-text-bright: rgba(255, 193, 125, 0.88);
    --color-accent-text-dim: rgba(255, 193, 125, 0.82);
    
    /* Background Overlays */
    --overlay-subtle: rgba(255, 255, 255, 0.03);
    --overlay-light: rgba(255, 255, 255, 0.04);
    --overlay-medium: rgba(255, 255, 255, 0.08);
    --overlay-strong: rgba(255, 255, 255, 0.18);
    
    /* Border Colors */
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.2);
    --border-stronger: rgba(255, 255, 255, 0.3);
    
    /* Accent Variations */
    --accent-subtle: rgba(255, 152, 0, 0.1);
    --accent-light: rgba(255, 152, 0, 0.15);
    --accent-medium: rgba(255, 152, 0, 0.2);
    --accent-strong: rgba(255, 152, 0, 0.6);
    --accent-solid: rgba(255, 152, 0, 0.95);
    
    /* ===================================
       TYPOGRAPHY
       =================================== */
    
    /* Font Families */
    --font-primary: 'Helvetica Neue', Helvetica, 'Inter', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Droid Sans Mono', 'Source Code Pro', monospace;
    --font-mono-alt: 'JetBrains Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
    
    /* Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    
    /* ===================================
       SPACING & SIZING
       =================================== */
    
    /* Border Radius */
    --radius-xs: 2px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    
    /* Spacing Scale */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;

    --section-padding: 112px 40px 112px;
    
    /* ===================================
       EFFECTS
       =================================== */
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-accent: 0 0 8px rgba(var(--color-accent-rgb), 0.4);
    --shadow-accent-strong: 0 0 0 1px rgba(var(--color-accent-rgb), 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-smooth: 0.3s ease;
    --transition-slow: 0.4s ease;
    
    /* Gradients */
    --gradient-backdrop: linear-gradient(0deg, var(--color-background) 0%, rgba(35, 31, 32, 0.92) 45%, rgba(35, 31, 32, 0) 100%);
    --gradient-backdrop-top: linear-gradient(180deg, var(--color-background) 0%, rgba(35, 31, 32, 0.92) 45%, rgba(35, 31, 32, 0) 100%);
    
    --countdown-outline-color: rgba(35, 31, 32, 0.5);
}


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

body {
    font-family: var(--font-primary);
    background: var(--color-background);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    padding-bottom: 60px;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

.container {
    width: 100%;
    min-height: 100vh;
    height: auto;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    position: relative;
}



.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 20px;
    background: rgba(35, 31, 32, 0.85); /* Semi-transparent background */
    -webkit-backdrop-filter: blur(8px); /* Safari support */
    backdrop-filter: blur(8px); /* Subtle blur for better readability */
    height: auto; /* allow bar to grow with SVG intrinsic heights */
    z-index: 100;
    position: fixed; /* Fixed positioning to overlay canvas */
    top: 0;
    left: 0;
    right: 0;
    border-bottom: 1px solid var(--border-light);
}

.left-logo,
.right-logo {
    width: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
}
.right-logo { padding-left:20px; }

.left-logo {
    padding-right:30px;
}

.left-logo:focus-visible,
.right-logo:focus-visible {
    outline: 2px solid var(--accent-strong);
    outline-offset: 4px;
}

.spacer {
    flex: 1 1 auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-menu__link {
    display: inline-block;
    padding: 8px 10px;
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: color 0.2s ease, background 0.2s ease;
    white-space: nowrap;
}

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

.nav-menu__link:focus-visible {
    outline: 2px solid var(--accent-strong);
    outline-offset: -2px;
}

.nav-menu--mobile {
    display: none;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
    align-items: center;
    justify-content: center;
}

.nav-toggle__line {
    display: block;
    width: 24px;
    height: 3px;
    background: rgba(255, 255, 255, 0.85);
    transition: background 0.2s ease, transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
}

.nav-toggle:hover .nav-toggle__line {
    background: rgba(255, 255, 255, 1);
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--accent-strong);
    outline-offset: -2px;
}

/* Hamburger animation when menu is open */
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.right-group {
    display: inline-flex;
    align-items: center;
    gap: 6px; /* small gap between refresh and rlogo */
}



.left-logo img,
.right-logo img {
    filter: brightness(0) invert(1); /* Make logos white */
    height: 40px;       /* fixed visible height */
    width: auto;
    display: block;
    pointer-events: none;
}


h1 {
    text-align: center;
    color: #5f5f5f;
    margin-bottom: 20px;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    font-weight: 300;
}

/* Static skyline hero */
.buildings-wrapper {
    position: relative;
    width: 100%;
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    padding-top: clamp(140px, 20vh, 260px);
}

.hero-skyline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: clamp(500px, 85vh, 950px);
    background-image: url('../images/ui/build.svg');
    background-repeat: repeat-x;
    background-position: center bottom;
    background-size: auto 100%;
    pointer-events: none;
    z-index: 1;
    transform: translate3d(0, 0, 0);
    will-change: transform;
}


.program-sections {
    background: var(--color-background);
    color: var(--color-text-primary);
    position: relative;
    z-index: 5;
    overflow: hidden;
}

.program-sections::before {
    display: none;
}

.program-inner {
    max-width: 1380px;
    margin: 0 auto;
    padding: var(--section-padding);
    box-sizing: border-box;
    position: relative;
    z-index: 1;
}

.program-heading {
    font-size: clamp(2.6rem, 4vw, 3.4rem);
    margin-bottom: 0.4em;
    font-weight: 550;
}

.program-intro {
    max-width: 760px;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text-standard);
    margin-bottom: 2.3rem;
}

.program-content {
    display: grid;
    gap: 56px;
}

.program-group + .program-group {
    margin-top: 0;
}

.program-group-title {
    font-size: clamp(1.8rem, 3vw, 2.3rem);
    margin-bottom: 1.4rem;
    font-weight: 520;
}

.session-grid {
    display: grid;
    gap: 32px 28px;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.session-card {
    background: transparent;
    border-top: 1px solid #e6e6e668;
    border-radius: 0px;
    padding: 26px;
    padding-left:0;
    padding-right:0;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.session-card:hover,
.session-card:focus-within {
    border-color: rgba(255, 162, 62, 0.763);
}

.session-card--keynote {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 380px) 1fr;
    grid-template-rows: auto auto;
    column-gap: 36px;
    row-gap: 24px;
    align-items: start;
}

.session-card--keynote .session-card-header {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
}

.session-card--keynote .session-description {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
    margin-top: 0;
}

.session-card--keynote .session-speakers {
    grid-column: 2 / 3;
    grid-row: 1 / span 2;
    align-self: start;
    margin-top: 0;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 18px 22px;
}

.session-card-header {
    margin-bottom: 0;
}

.session-meta {
    font-size: 0.92rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent-text-dim);
    margin-bottom: 8px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: 'Jetbrains Mono', 'IBM Plex Mono', 'Courier New', Courier, monospace;
}

.session-meta span {
    display: inline-block;
}

.session-meta .session-category-icon {
    width: 18px;
    height: 18px;
    filter: brightness(0) saturate(100%) invert(82%) sepia(29%) saturate(612%) hue-rotate(339deg) brightness(102%) contrast(97%);
    opacity: 0.82;
    flex: 0 0 auto;
}

.session-title {
    font-size: 1.45rem;
    margin: 0;
    line-height: 1.3;
    font-weight: 600;
}

.session-description {
    font-size: 1rem;
    line-height: 1.78;
    color: var(--color-text-standard);
}

.session-speakers {
    list-style: none;
    display: grid;
    gap: 16px 22px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin-top: auto;
    padding: 0;
}

@media (min-width: 1280px) {
    .session-card--keynote .session-speakers,
    .session-card[data-type="panel"] .session-speakers {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}


.schedule-preview {
    position: relative;
    padding: 0;
    background: var(--color-background);
    color: var(--color-text-primary);
}

.schedule-inner {
    max-width: 1380px;
    margin: 0 auto;
    padding: var(--section-padding);
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.schedule-heading {
    margin: 0 0 0.4em;
}

.schedule-intro {
    max-width: 720px;
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.68;
    margin: 0;
}


.schedule-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.schedule-controls__options {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.schedule-controls__button {
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 6px 16px;
    border-radius: 999px;
    cursor: pointer;
    transition: background var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
}

.schedule-controls__button:hover,
.schedule-controls__button:focus-visible {
    background: var(--overlay-strong);
    color: var(--color-text-primary);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.schedule-controls__button.is-active {
    background: linear-gradient(135deg, #ffb347, #ff7a18);
    color: #1d1d1d;
    box-shadow: 0 10px 30px rgba(255, 122, 24, 0.35);
}

.schedule-controls__button.is-active:hover,
.schedule-controls__button.is-active:focus-visible {
    color: #1d1d1d;
}

@media (max-width: 720px) {
    .schedule-controls {
        flex-direction: column;
        align-items: flex-start;
    }

    .schedule-day-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .schedule-day-header .schedule-controls {
        width: 100%;
    }
}

.schedule-venues {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
    padding: 16px 20px;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-muted);
}

.schedule-summary {
    display: grid;
    gap: 0.75rem;
    margin: 2rem 0 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.schedule-summary__item {
    background: rgba(20, 20, 28, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.schedule-summary__label {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0.35rem;
}

.schedule-summary__value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    word-break: break-word;
}

.schedule-change-summary {
    margin: -0.5rem 0 2rem;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
}

.schedule-venue {
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-decoration: none;
    color: inherit;
}

.schedule-venue:hover {
    color: rgba(255, 210, 153, 0.94);
}

.schedule-venue:focus-visible {
    color: rgba(255, 210, 153, 0.94);
    outline: 2px solid rgba(255, 210, 153, 0.35);
    outline-offset: 3px;
}

.schedule-venue-name {
    font-size: 0.92rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent-text-muted);
}

.schedule-venue-address {
    font-size: 0.88rem;
    color: var(--color-text-subtle);
}

.schedule-venue-note {
    margin-top: 4px;
    align-self: flex-start;
}

.schedule-grid {
    display: grid;
    gap: 40px;
}

.sponsors-section {
    color: var(--color-text-primary);
    position: relative;
    z-index: 4;
}
    
.sponsors-inner {
    max-width: 1380px;
    margin: 0 auto;
    padding: var(--section-padding);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}
    
.sponsors-intro {
    max-width: 700px;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text-standard);
}
    
.sponsors-content {
    border-top: 1px solid var(--border-subtle);
    padding-top:40px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sponsors-tier {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    align-items: center;
}

.sponsors-tier--no-heading {
    gap: 0;
}

.sponsors-tier__heading {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 210, 153, 0.85);
    text-align: center;
}
    
.sponsors-grid {
    display: grid;
    gap: 28px;
    justify-content: center;
    justify-items: center;
    align-items: center;
    width: 100%;
    margin: 0 auto;
}

.sponsors-grid[data-tier="1"] {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    max-width: none;
    gap: 32px;
    justify-items: stretch;
}

.sponsors-grid[data-tier="2"] {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    max-width: 960px;
    gap: 32px;
    justify-items: center;
}

.sponsors-grid[data-tier="3"] {
    grid-template-columns: repeat(auto-fit, minmax(260px, 320px));
    max-width: 960px;
    gap: 32px;
    justify-content: center;
    justify-items: center;
}
    
.sponsor-tile {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 12px;
    padding: 20px;
    opacity: 0.75;
    transition: opacity var(--transition-base);
    color: inherit;
    text-decoration: none;
    width: 100%;
    max-width: 240px;
}

.sponsor-tile[data-tier="1"] {
    max-width: none;
}

.sponsor-tile[data-tier="2"] {
    max-width: 245px;
}

.sponsor-tile[data-tier="3"] {
    width: 100%;
    max-width: 320px;
}
    
.sponsor-tile:hover,
.sponsor-tile:focus-visible {
    opacity: 1;
}
    
.sponsor-tile:focus-visible {
    outline: 2px solid rgba(255, 162, 62, 0.6);
    outline-offset: 4px;
    border-radius: 8px;
}
    
.sponsor-tile__logo {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sponsors-grid[data-tier="1"] .sponsor-tile__logo {
    height: 130px;
}

.sponsors-grid[data-tier="2"] .sponsor-tile__logo {
    height: 110px;
}

.sponsors-grid[data-tier="3"] .sponsor-tile__logo {
    height: 130px;
}
    
.sponsor-tile__logo img {
    max-width: 100%;
    height: 80px;
    width: auto;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.sponsors-grid[data-tier="2"] .sponsor-tile__logo img {
    height: 110px;
}

.sponsors-grid[data-tier="3"] .sponsor-tile__logo img {
    height: 130px;
}

@media (max-width: 940px) and (min-width: 641px) {
    .sponsors-grid[data-tier="1"],
    .sponsors-grid[data-tier="2"],
    .sponsors-grid[data-tier="3"] {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        max-width: 940px;
        gap: 24px;
    }

    .sponsor-tile[data-tier="1"],
    .sponsor-tile[data-tier="2"],
    .sponsor-tile[data-tier="3"] {
        padding: 16px 18px;
    }

    .sponsors-grid[data-tier="1"] .sponsor-tile__logo,
    .sponsors-grid[data-tier="2"] .sponsor-tile__logo,
    .sponsors-grid[data-tier="3"] .sponsor-tile__logo {
        height: 100px;
    }

    .sponsors-grid[data-tier="1"] .sponsor-tile__logo img,
    .sponsors-grid[data-tier="2"] .sponsor-tile__logo img,
    .sponsors-grid[data-tier="3"] .sponsor-tile__logo img {
        height: 100px;
    }
}

@media (max-width: 640px) {
    .sponsors-grid[data-tier="1"],
    .sponsors-grid[data-tier="2"],
    .sponsors-grid[data-tier="3"] {
        grid-template-columns: 1fr;
        max-width: 520px;
        gap: 22px;
    }

    .sponsor-tile[data-tier="1"],
    .sponsor-tile[data-tier="2"],
    .sponsor-tile[data-tier="3"] {
        padding: 18px;
        max-width: none;
    }

    .sponsors-grid[data-tier="1"] .sponsor-tile__logo,
    .sponsors-grid[data-tier="2"] .sponsor-tile__logo,
    .sponsors-grid[data-tier="3"] .sponsor-tile__logo {
        height: 96px;
    }

    .sponsors-grid[data-tier="1"] .sponsor-tile__logo img,
    .sponsors-grid[data-tier="2"] .sponsor-tile__logo img,
    .sponsors-grid[data-tier="3"] .sponsor-tile__logo img {
        height: 90px;
    }
}
    
.sponsor-tile__name {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-text-muted);
    display:none;
}
    
.sponsor-tile:not(a) {
    cursor: default;
}
    
.sponsors-empty {
    font-size: 1rem;
    color: var(--color-text-standard);
    opacity: 0.7;
    margin: 0;
}
    
.sponsor-table .program-session-table__header-actions { text-align:right;}
.sponsor-table .sponsor-table__status { text-align:left; }

.schedule-day {
    display: flex;
    flex-direction: column;
    gap: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 28px;
}

.schedule-day:first-of-type {
    border-top: none;
    padding-top: 0;
}

.schedule-day-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding: 0;
}

.schedule-day-heading {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1 1 auto;
}

.schedule-day-header h3 {
    margin: 0;
    font-size: 1.28rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-accent-text);
}

.schedule-day-sub {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.schedule-day-header .schedule-controls {
    margin-left: auto;
    flex-shrink: 0;
}

.schedule-table {
    display: flex;
    flex-direction: column;
    gap: 18px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.schedule-row {
    display: grid;
    grid-template-columns: 100px repeat(3, minmax(0, 1fr));
    gap: 18px;
    align-items: start;
    color: var(--color-text-secondary);
}

.schedule-row + .schedule-row {
    padding-top: 12px;
    border-top: 1px solid var(--border-subtle);
}

.schedule-row--header {
    padding-top: 0;
    border-top: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.92rem;
    font-family: 'Jetbrains Mono','IBM Plex Mono', 'Courier New', Courier, monospace;
    color: var(--color-text-standard);
    font-weight: 600;
}

.schedule-row--header .schedule-cell {
    font-weight: 600;
    color: inherit;
    font-family: inherit;
}

.schedule-cell {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-height: 24px;
}

.schedule-cell--time {
    font-family: 'Jetbrains Mono','IBM Plex Mono', 'Courier New', Courier, monospace;
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--color-text-standard);
}

.schedule-cell strong {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.98rem;
    color: var(--color-text-bright);
}

.schedule-cell span {
    font-size: 0.94rem;
    color: var(--color-text-subtle);
}

.schedule-cell--entry {
    cursor: pointer;
}

.schedule-cell--entry strong {
    text-decoration: underline 0.08em transparent;
    transition: color var(--transition-base), text-decoration-color var(--transition-base);
}

.schedule-cell--entry:hover strong,
.schedule-cell--entry:focus-visible strong {
    color: var(--color-accent-text);
    text-decoration-color: rgba(255, 210, 153, 0.6);
}

.schedule-cell--entry:focus-visible {
    outline: 2px solid rgba(255, 210, 153, 0.45);
    outline-offset: 3px;
}

.schedule-duration {
    font-size: 0.72rem !important;
    color: var(--color-text-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    display:none;
}

.schedule-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 6px;
}

.schedule-action {
    padding: 6px 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-family: 'JetBrains Mono','IBM Plex Mono','Courier New', monospace;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--color-accent-text-muted);
    background: transparent;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-xs);
    cursor: pointer;
    transition: color var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
    text-decoration: none;
}

.schedule-action:hover,
.schedule-action:focus-visible {
    border-color: rgba(255, 210, 153, 0.5);
    color: var(--color-accent-text);
    background-color: rgba(255, 210, 153, 0.06);
}

.schedule-action:focus-visible {
    outline: 2px solid rgba(255, 210, 153, 0.35);
    outline-offset: 2px;
}

.schedule-add::before {
    content: '';
    width: 14px;
    height: 14px;
    background: url('../images/ui/calendar-plus.svg') no-repeat center / 14px 14px;
    filter: invert(83%) sepia(51%) saturate(385%) hue-rotate(325deg) brightness(102%) contrast(96%);
}

.schedule-map::before {
    content: '';
    width: 14px;
    height: 14px;
    background: url('../images/ui/location-pin.svg') no-repeat center / 14px 14px;
    filter: invert(83%) sepia(51%) saturate(385%) hue-rotate(325deg) brightness(102%) contrast(96%);
}

.schedule-note {
    margin: 0;
    font-size: 0.88rem;
    color: var(--color-text-faint);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.schedule-cell--empty {
    visibility: hidden;
}

@media (max-width: 960px) {
    .schedule-inner {
        padding: var(--section-padding);
    }

    .schedule-row {
        gap: 16px;
        grid-template-columns: 70px repeat(3, minmax(0, 1fr));
    }

    .schedule-venues {
        padding: 14px 16px;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 720px) {
    .schedule-table {
        gap: 18px;
        overflow-x: visible;
        padding-bottom: 0;
    }

    .schedule-venues {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 14px 14px;
    }

    .schedule-row {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 0;
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 4px;
        background: transparent;
        min-width: 0;
    }

    .schedule-row + .schedule-row {
        padding-top: 18px;
        border: none;
    }

    .schedule-row--header {
        display: none;
    }

    .schedule-cell--time {
        font-size: 0.88rem;
        color: rgba(237, 237, 237, 0.82);
        letter-spacing: 0.12em;
    }

    .schedule-cell[data-venue] {
        padding: 12px 14px;
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 3px;
        background: transparent;
        gap: 6px;
    }

    .schedule-cell[data-venue]::before {
        content: attr(data-venue);
        display: block;
        font-size: 0.75rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: rgba(235, 233, 230, 0.62);
    }

    .schedule-cell[data-venue] strong {
        font-size: 0.95rem;
    }

    .schedule-cell[data-venue] span {
        font-size: 0.9rem;
    }

    .schedule-actions {
        flex-direction: column;
        gap: 10px;
        margin-top: 10px;
    }

    .schedule-actions .schedule-action {
        width: 100%;
        justify-content: center;
    }

    .schedule-cell--empty {
        visibility: visible;
        opacity: 0.28;
    }
}

.schedule-cell[data-type="talk"] strong::before,
.schedule-cell[data-type="panel"] strong::before,
.schedule-cell[data-type="workshop"] strong::before {
    content: '';
    width: 18px;
    height: 18px;
    flex: 0 0 18px;
    background-repeat: no-repeat;
    background-size: 18px 18px;
    filter: invert(90%) sepia(12%) saturate(280%) hue-rotate(330deg) brightness(104%) contrast(95%);
    opacity: 0.85;
}

.schedule-cell[data-type="talk"] strong::before,
.schedule-cell[data-type="panel"] strong::before {
    background-image: url('../images/ui/microphone.svg');
}

.schedule-cell[data-type="workshop"] strong::before {
    background-image: url('../images/ui/cog.svg');
}

.speaker-entry {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 0;
    margin: 0;
    border-radius: 6px;
    color: inherit;
    cursor: pointer;
}

.speaker-entry:not([data-bio]) {
    cursor: default;
}

.speaker-entry:focus-visible {
    outline: 2px solid rgba(255, 193, 125, 0.75);
    outline-offset: 3px;
}

.speaker-entry img,
.speaker-entry .speaker-initials {
    width: 60px;
    height: 60px;
    border-radius: 5px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    object-fit: cover;
    display: block;
    flex-shrink: 0;
    overflow: hidden;
    filter: grayscale(100%) contrast(1.05);
    transition: transform 0.25s ease, filter 0.25s ease, box-shadow 0.25s ease;
}

.speaker-entry .speaker-initials {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--color-accent-text-bright);
}

.speaker-entry .speaker-name {
    font-size: 1.02rem;
    font-weight: 500;
    line-height: 1.3;
}

.speaker-entry[data-bio]:hover img,
.speaker-entry[data-bio]:focus-visible img {
    transform: scale(1.08);
    filter: grayscale(100%) contrast(1.15);
    box-shadow: 0 12px 22px rgba(0, 0, 0, 0.35);
}

.speaker-entry[data-bio]:hover .speaker-initials,
.speaker-entry[data-bio]:focus-visible .speaker-initials {
    transform: scale(1.05);
    box-shadow: 0 10px 18px rgba(0, 0, 0, 0.35);
}

.speaker-entry:hover .speaker-name,
.speaker-entry:focus-visible .speaker-name {
    color: rgba(255, 193, 125, 0.95);
}

.session-speakers[data-count="2"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 768px) {
    .program-inner {
        padding: var(--section-padding);
    }

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

    .session-card {
        padding: 22px;
        padding-left:0;
        padding-right:0;
    }

    .session-card--keynote {
        display: flex;
        flex-direction: column;
        gap: 18px;
    }

    .session-speakers {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 14px 18px;
    }

    .speaker-entry img,
    .speaker-entry .speaker-initials {
        width: 56px;
        height: 56px;
        border-radius: 5px;
    }
}

.speaker-popup-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(12, 10, 9, 0.72);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.24s ease;
    z-index: 160;
}

.speaker-popup-overlay.speaker-popup-overlay--visible {
    opacity: 1;
    pointer-events: auto;
}

body.speaker-modal-open {
    overflow: scroll;
    pointer-events: none;
}

body.schedule-modal-open {
    overflow: scroll;
    pointer-events: none;
}

.speaker-popup {
    position: relative;
    width: min(780px, 94vw);
    max-height: min(85vh, 760px);
    display: flex;
    flex-direction: column;
    color: var(--color-text-secondary);
    background: linear-gradient(180deg, rgba(40, 36, 34, 0.98) 0%, rgba(24, 22, 20, 0.98) 100%);
    border: 1px solid rgba(224, 224, 228, 0.413);
    border-radius: var(--radius-sm);
    box-shadow: 0 28px 54px rgba(0, 0, 0, 0.55);
    overflow: hidden;
    opacity: 0;
    transform: translateY(28px) scale(0.97);
    transition: opacity 0.26s ease, transform 0.26s ease;
}

.speaker-popup::before {
    content: '';
    position: absolute;
    inset: 0;
    border: 1px solid rgba(224, 224, 228, 0.35);
    border-radius: 4px;
    pointer-events: none;
}

.speaker-popup.speaker-popup--visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.schedule-entry-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(12, 10, 9, 0.72);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.24s ease;
    z-index: 155;
}

.schedule-entry-overlay.schedule-entry-overlay--visible {
    opacity: 1;
    pointer-events: auto;
}

.schedule-entry-modal {
    position: relative;
    width: min(720px, 94vw);
    max-height: min(85vh, 720px);
    display: flex;
    flex-direction: column;
    color: var(--color-text-secondary);
    background: linear-gradient(180deg, rgba(40, 36, 34, 0.98) 0%, rgba(24, 22, 20, 0.98) 100%);
    border: 1px solid rgba(224, 224, 228, 0.35);
    border-radius: var(--radius-sm);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    overflow: hidden;
    opacity: 0;
    transform: translateY(24px) scale(0.97);
    transition: opacity 0.26s ease, transform 0.26s ease;
}

.schedule-entry-modal.schedule-entry-modal--visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.schedule-entry-modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    background: rgba(224, 224, 228, 0.85);
    border-bottom: 1px solid rgba(224, 224, 228, 0.75);
    gap: 12px;
}

.schedule-entry-modal__titlegroup {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.schedule-entry-modal__title {
    font-size: 1.02rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: rgba(28, 24, 22, 0.92);
    margin: 0;
}

.schedule-entry-modal__subtitle {
    margin: 0;
    font-size: 0.9rem;
    color: rgba(28, 24, 22, 0.7);
}

.schedule-entry-modal__close {
    background: none;
    border: none;
    color: rgba(28, 24, 22, 0.75);
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    transition: color 0.2s ease, transform 0.2s ease;
}

.schedule-entry-modal__close:hover,
.schedule-entry-modal__close:focus-visible {
    color: rgba(28, 24, 22, 0.95);
    transform: scale(1.06);
}

.schedule-entry-modal__body {
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.schedule-entry-modal__meta {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.schedule-entry-modal__meta-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.schedule-entry-modal__meta-item.is-hidden,
.schedule-entry-modal__meta-item[hidden] {
    display: none !important;
}

.schedule-entry-modal__meta-label {
    flex: 0 0 90px;
    font-size: 0.76rem;
    font-family: 'JetBrains Mono','IBM Plex Mono','Courier New',monospace;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 210, 153, 0.85);
}

.schedule-entry-modal__meta-value {
    flex: 1;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.schedule-entry-modal__map-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-left: 6px;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent-text-bright);
}

.schedule-entry-modal__map-link:hover,
.schedule-entry-modal__map-link:focus-visible {
    color: var(--color-accent-text);
    text-decoration: underline;
}

.schedule-entry-modal__description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    white-space: pre-line;
}

.schedule-entry-modal__footer {
    display: flex;
    justify-content: flex-end;
}

.schedule-entry-modal__add {
    align-self: flex-end;
}

.speaker-popup-titlebar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: rgba(224, 224, 228, 0.85);
    border-bottom: 1px solid rgba(224, 224, 228, 0.85);
    gap: 12px;
}

.speaker-popup-titlegroup {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.speaker-popup-title-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    object-fit: contain;
}

.speaker-popup-title {
    display: block;
    font-size: 0.96rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: rgba(32, 28, 26, 0.9);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.speaker-popup-close {
    margin-left: auto;
    background: none;
    border: none;
    color: rgba(32, 28, 26, 0.75);
    font-size: 1.45rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    transition: color 0.2s ease, transform 0.2s ease;
}

.speaker-popup-close:hover,
.speaker-popup-close:focus {
    color: rgba(32, 28, 26, 0.95);
    transform: scale(1.08);
}

.speaker-popup-close:focus {
    outline: none;
}

.speaker-popup-body {
    display: flex;
    gap: 22px;
    padding: 22px 24px 26px;
    background: rgba(32, 29, 27, 0.96);
    align-items: flex-start;
    flex: 1 1 auto;
    overflow-y: auto;
}

.speaker-popup-image {
    width: 220px;
    height: 220px;
    flex-shrink: 0;
    border-radius: 4px;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.18);
    border: 1px solid rgba(224, 224, 228, 0.45);
    box-shadow: none;
    background: rgba(255, 255, 255, 0.03);
}

.speaker-popup.speaker-popup--no-image .speaker-popup-body {
    padding-left: 24px;
}

.speaker-popup-content {
    display: flex;
    flex-direction: column;
    gap: 14px;
    font-size: 1rem;
    line-height: 1.68;
    color: rgba(236, 236, 241, 0.9);
    min-height: 0;
}

.speaker-popup-bio {
    margin: 0;
}

.speaker-popup-sessions {
    border-top: 0px solid rgba(224, 224, 228, 0.16);
    padding-top: 16px;
    margin-top: 4px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.speaker-popup-sessions[hidden] {
    display: none;
}

.speaker-popup-section-title {
    margin: 0;
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(236, 236, 241, 0.72);
}

.speaker-popup-session-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.speaker-popup-session {
    /** background: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid rgba(224, 224, 228, 0.14); **/
    border-top: 1px solid rgba(224, 224, 228, 0.14);
    /** border-radius: 6px; **/
    padding: 12px 14px 14px;
    padding-left:0;
    padding-right:0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.speaker-popup-session-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
}

.speaker-popup-session-title {
    margin: 0;
    font-size: 1.02rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.92);
}

.speaker-popup-session-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(224, 224, 228, 0.14);
    color: rgba(224, 224, 228, 0.9);
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
}

.speaker-popup-session-tag-icon {
    width: 16px;
    height: 16px;
    filter: invert(90%);
    opacity: 0.92;
}

.speaker-popup-session-meta,
.speaker-popup-session-venue,
.speaker-popup-session-co {
    margin: 0;
    font-size: 0.85rem;
    color: rgba(236, 236, 241, 0.72);
    line-height: 1.5;
}

.speaker-popup-session-venue {
    font-style: italic;
    color: rgba(236, 236, 241, 0.66);
}

.speaker-popup-session-co {
    color: rgba(236, 236, 241, 0.58);
}

.speaker-popup-session-actions {
    margin-top: 4px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.speaker-popup-session-actions .schedule-action {
    font-size: 0.78rem;
    padding: 6px 14px;
}

@media (max-width: 640px) {
    .speaker-popup {
        min-width: 0;
    }

    .program-inner,
    .schedule-inner,
    .sponsors-inner {
        padding: 64px 16px;
    }

    .speaker-popup-body {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 14px;
    }

    .speaker-popup-image {
        width: 176px;
        height: 176px;
        border-radius: 4px;
    }

    .speaker-popup-content {
        font-size: 0.92rem;
    }

    .speaker-popup-sessions {
        text-align: left;
        width: 100%;
    }

    .speaker-popup-session {
        gap: 10px;
    }

    .speaker-popup-session-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .session-speakers[data-count="2"] {
        grid-template-columns: 1fr;
    }
}


/* Responsive design */
@media (max-width: 768px) {
    .top-bar {
        padding: 5px 10px;
        height: 50px;
    }
    
    .left-logo,
    .right-logo {
        height: 30px;
    }
    
    .left-logo img,
    .right-logo img {
        max-width: 200px;
    }
    
    .buildings-grid {
        height: calc(100vh - 50px);
    }
    
    .refresh-btn {
        padding: 6px;
    }
    
    .refresh-btn svg {
        width: 14px;
        height: 14px;
    }
}

@media (min-width: 1024px) {
    :root { --logo-height: 56px; }
}
    
    .tiny {
        --width: 30px;
        --height: 30px;
        --depth: 30px;
    }
    
    .small {
        --width: 60px;
        --height: 45px;
        --depth: 60px;
    }
    
    .medium {
        --width: 80px;
        --height: 80px;
        --depth: 80px;
    }
    
    .large {
        --width: 100px;
        --height: 120px;
        --depth: 100px;
    }
    
    .extra-large {
        --width: 120px;
        --height: 150px;
        --depth: 120px;
    }

/* Mobile responsiveness */
@media screen and (max-width: 1200px) {
    
    /* Show nav toggle (hamburger) on mobile */
    .nav-toggle {
        display: flex;
        order: 3;
    }
    
    /* Hide desktop nav menu on tablets and below, show mobile instead */
    .nav-menu:not(.nav-menu--mobile) {
        display: none !important;
    }
    
    /* Mobile nav drawer - starts hidden, shown when .nav-menu--open */
    .nav-menu--mobile {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(35, 31, 32, 0.74);
        -webkit-backdrop-filter: blur(8px);
        backdrop-filter: blur(8px);
        display: none;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        z-index: 99;
        gap: 24px;
        margin: 0;
        padding: 0;
        list-style: none;
        pointer-events: none;
    }
    
    .nav-menu--mobile.nav-menu--open {
        display: flex;
        pointer-events: auto;
    }
    
    .nav-menu--mobile .nav-menu__link {
        padding: 12px 16px;
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.9);
        width: 100%;
        text-align: center;
    }
    
    .nav-menu--mobile .nav-menu__link:hover {
        color: var(--color-background);
        background: var(--color-accent);
    }
}

@media screen and (max-width: 860px) {
    /* Header adjustments for mobile */
    .header {
        padding: 10px 15px;
        flex-wrap: wrap;
        gap: 10px;
    }
     
    .left-logo img, .right-logo img {
        height: 32px;
        width: auto; /* Maintain aspect ratio */
    }
    
    /* Use mobile-specific narrower right logo for better space utilization */
    .right-logo img[src*="rlogos.svg"] {
        content: url('../images/ui/rlogos-mobile.svg');
    }
    
    .right-logo {
        padding-left: 10px;
    }
    .right-group { gap:0; }
}

@media screen and (max-width: 480px) {
    /* Very small screens */
    .header {
        padding: 8px 10px;
    }
    
    .left-logo img, .right-logo img {
        height: 20px; /* Match very small screen proportions */
        width: auto; /* Maintain aspect ratio */
    }
    
    .refresh-btn img {
        width: 20px !important;
        height: 20px !important;
    }
    
    /* Use mobile-specific narrower right logo for better space utilization */
    .right-logo img[src*="rlogos.svg"] {
        content: url('../images/ui/rlogos-mobile.svg');
    }
    
}