/* ============================================================
   TEDx Sreyas Institute — Design System
   Primary: #E62B1E | Background: #000 / #fff | Grayscale accents
   ============================================================ */

/* ── Google Font Import ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── CSS Custom Properties (Design Tokens) ── */
:root {
    /* Colors */
    --ted-red: #E62B1E;
    --ted-red-dark: #b01f14;
    --ted-red-light: #ff4136;
    --black: #000000;
    --white: #ffffff;
    --gray-100: #f5f5f5;
    --gray-200: #e0e0e0;
    --gray-300: #bdbdbd;
    --gray-400: #9e9e9e;
    --gray-500: #757575;
    --gray-600: #616161;
    --gray-700: #424242;
    --gray-800: #212121;
    --gray-900: #121212;

    /* Typography */
    --font-family: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --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;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    --font-size-7xl: 4.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Layout */
    --container-max: 1024px;
    /* Reduced from 1280px to match 80% UI scale */
    --nav-height: 80px;
    --border-radius: 4px;
    --border-radius-lg: 8px;
    --transition: 0.3s ease;
}

/* ── Reset & Base ── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 13.33px;
    /* Set to 13.33px for 100% scale (calculated as 16px / 1.2) */
}

body {
    font-family: var(--font-family);
    background-color: var(--black);
    color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a,
button,
[role="button"],
.clickable,
input,
textarea,
select {
    cursor: none !important;
}

/* Force hide system cursor on ALL elements site-wide */
html, html *, html *::before, html *::after {
    cursor: none !important;
}

/* Cover iframes and canvas which can escape cursor:none */
iframe, canvas, video, embed, object {
    pointer-events: none;
    cursor: none !important;
}

/* When custom cursor is enabled on pointer devices */
body.has-custom-cursor {
    cursor: none;
}

/* ── Global Premium Cursor & Glow ── */
.cursor-dot {
    position: fixed;
    top: 0;
    left: 0;
    width: 6px;
    height: 6px;
    background-color: #ff0000;
    /* Pure red */
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    /* Tighter halo for 1cm-ish feel */
    box-shadow:
        0 0 5px #ff0000,
        0 0 15px rgba(255, 0, 0, 0.8),
        0 0 25px rgba(255, 0, 0, 0.4);
    will-change: transform, width, height;
    transition: width 0.3s cubic-bezier(0.23, 1, 0.32, 1), height 0.3s cubic-bezier(0.23, 1, 0.32, 1), background-color 0.3s;
}

.cursor-dot.active {
    width: 60px;
    height: 60px;
    background-color: transparent;
    border: 1px solid var(--ted-red);
    box-shadow: 0 0 15px rgba(230, 43, 30, 0.3) inset;
    backdrop-filter: invert(1);
}

.ambient-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 2cm;
    height: 2cm;
    /* 1cm radius */
    background: radial-gradient(circle, rgba(255, 0, 0, 0.3) 0%, rgba(255, 0, 0, 0) 75%);
    pointer-events: none;
    z-index: 9998;
    border-radius: 50%;
    filter: blur(8px);
    /* Reduced blur for smaller size */
    will-change: transform;
}

#stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 2;
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul,
ol {
    list-style: none;
}

button {
    font-family: var(--font-family);
    border: none;
    background: none;
}

/* ── Navigation (Floating Pill Style) ── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1000;
    padding-top: 4px;
    padding-bottom: 4px;
    transition: all 0.7s cubic-bezier(0.23, 1, 0.32, 1);
    pointer-events: none;
    /* Let clicks pass through empty space */
}

.navbar-inner {
    max-width: 1178px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    border-radius: 16px;
    transition: all 0.7s cubic-bezier(0.23, 1, 0.32, 1);
    /* Initially transparent */
    background: transparent;
    pointer-events: auto;
    /* Reactivate clicks on the nav bar itself */
    border: 1px solid transparent;
}

.navbar.scrolled {
    top: 14px;
}

.navbar.scrolled .navbar-inner {
    background: rgba(30, 30, 36, 0.55);
    backdrop-filter: blur(32px) saturate(1.8) brightness(0.9);
    -webkit-backdrop-filter: blur(32px) saturate(1.8) brightness(0.9);
    border: 1px solid rgba(144, 144, 160, 0.15);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4), 0 0 0 0.5px rgba(128, 128, 144, 0.08);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 0;
    flex-shrink: 0;
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-logo:hover {
    transform: scale(1.03);
}

/* ── TEDx text logo ── */
.nav-logo {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    text-decoration: none;
}

.nav-logo-mark {
    display: flex;
    align-items: baseline;
    line-height: 1;
}

.nav-logo-ted {
    font-family: 'Inter', sans-serif;
    font-weight: 900;
    font-size: 1.5rem;
    color: #E62B1E;
    letter-spacing: -0.02em;
}

.nav-logo-x {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    color: #E62B1E;
    position: relative;
    top: -0.6em;
    /* Adjusted for better alignment */
    margin-right: 2px;
}

.nav-logo-name {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    /* Medium weight to match image */
    font-size: 1.45rem;
    color: #FFFFFF;
    letter-spacing: -0.01em;
}

.nav-logo-tagline {
    font-family: 'Inter', sans-serif;
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.75);
    /* Increased visibility to match image */
    letter-spacing: 0.01em;
    margin-top: 2px;
    white-space: nowrap;
}

.nav-logo-img {
    height: 48px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    display: block;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-logo:hover .nav-logo-img {
    transform: scale(1.04);
    opacity: 0.9;
}

.nav-center {
    display: none;
    align-items: center;
    gap: 4px;
}

@media (min-width: 768px) {
    .nav-center {
        display: flex;
    }
}

.nav-links-container {
    position: relative;
    border-radius: 12px;
    padding: 2px;
}



.nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
    z-index: 1;
}

.nav-active-bg {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    /* bg-white/8 */
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    z-index: 0;
    pointer-events: none;
    opacity: 0;
}

.nav-links a {
    color: #a3a3a3;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    padding: 8px 16px;
    border-radius: 8px;
    transition: color 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    display: block;
    position: relative;
    z-index: 1;
}

.nav-links a:hover {
    color: white;
}

.nav-links a.active {
    color: white;
    background: transparent;
}

.nav-divider {
    height: 20px;
    width: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 0 12px;
}

/* Red Register/Book CTA */
.nav-cta {
    position: relative;
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    color: white !important;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1) !important;
    display: flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(to right, #dc2626, #ef4444) !important;
    /* red-600 to red-500 */
}

.nav-cta:hover {
    box-shadow: 0 0 28px rgba(235, 0, 40, 0.35);
}

.nav-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, #ef4444, #f43f5e);
    /* red-500 to rose-500 */
    opacity: 0;
    transition: opacity 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-cta:hover::before {
    opacity: 1;
}

.nav-cta .cta-shine {
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: transform 0.7s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-cta:hover .cta-shine {
    transform: translateX(100%);
}

.nav-cta .cta-border {
    position: absolute;
    inset: 0;
    border-radius: 12px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
    opacity: 0;
    transition: opacity 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-cta:hover .cta-border {
    opacity: 1;
}

.nav-cta span {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-cta svg {
    width: 14px;
    height: 14px;
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-cta:hover svg {
    transform: translateX(4px);
}

/* Hamburger */
.nav-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: transparent;
    border: none;
    cursor: pointer;
    align-items: center;
    padding: 10px 8px;
    transition: background 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-hamburger:hover {
    background: rgba(255, 255, 255, 0.08);
    /* hover:bg-white/8 */
}

.nav-hamburger-inner {
    width: 20px;
    height: 16px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.nav-hamburger span {
    display: block;
    height: 1.5px;
    background: white;
    border-radius: 999px;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-hamburger span:nth-child(1) {
    width: 100%;
    transform-origin: center;
}

.nav-hamburger span:nth-child(2) {
    width: 75%;
}

.nav-hamburger span:nth-child(3) {
    width: 100%;
    transform-origin: center;
}

/* Open State mobile menu button */
.nav-hamburger.open span:nth-child(1) {
    transform: translateY(7.25px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: translateX(10px);
}

.nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7.25px) rotate(-45deg);
}

@media (min-width: 768px) {
    .nav-hamburger {
        display: none;
    }
}

.nav-hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile menu: Compact floating card from the hamburger button ── */
.nav-mobile-menu {
    /* Always rendered in the flex flow — visibility handles show/hide for animation */
    display: flex;
    flex-direction: column;
    gap: 7px;

    /* Anchored to top-right, just below the navbar */
    position: fixed;
    top: calc(var(--nav-height) + 8px);
    right: 16px;
    left: auto;
    width: 224px;

    /* Glassy dark card */
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(32px);
    -webkit-backdrop-filter: blur(32px);
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: 18px;
    padding: 12px;
    box-shadow:
        0 0 0 1px rgba(230, 43, 30, 0.10),
        0 24px 60px rgba(0, 0, 0, 0.75),
        0 8px 24px rgba(0, 0, 0, 0.5),
        0 0 40px rgba(230, 43, 30, 0.06);

    /* Hidden by default — animates in */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(0.82) translateY(-10px);
    transform-origin: top right;
    transition:
        opacity 0.28s cubic-bezier(0.23, 1, 0.32, 1),
        transform 0.32s cubic-bezier(0.34, 1.56, 0.64, 1),
        visibility 0s linear 0.32s;
    z-index: 9999;
}

/* Small caret arrow pointing up toward the hamburger */
.nav-mobile-menu::before {
    content: '';
    position: absolute;
    top: -7px;
    right: 20px;
    width: 13px;
    height: 13px;
    background: rgba(14, 14, 14, 0.95);
    border-left: 1px solid rgba(255, 255, 255, 0.10);
    border-top: 1px solid rgba(255, 255, 255, 0.10);
    transform: rotate(45deg);
    border-radius: 2px 0 0 0;
}

.nav-mobile-menu.open {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transform: scale(1) translateY(0);
    transition:
        opacity 0.28s cubic-bezier(0.23, 1, 0.32, 1),
        transform 0.32s cubic-bezier(0.34, 1.56, 0.64, 1),
        visibility 0s linear 0s;
}

/* Staggered entrance for each link */
.nav-mobile-menu a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: rgba(255, 255, 255, 0.52);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    text-decoration: none;
    transition:
        color 0.22s ease,
        background 0.22s ease,
        border-color 0.22s ease,
        box-shadow 0.22s ease,
        transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    /* Staggered slide-in when menu opens */
    opacity: 0;
    transform: translateX(12px);
}

.nav-mobile-menu.open a {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger delays */
.nav-mobile-menu.open a:nth-child(1) { transition-delay: 0.04s; }
.nav-mobile-menu.open a:nth-child(2) { transition-delay: 0.08s; }
.nav-mobile-menu.open a:nth-child(3) { transition-delay: 0.12s; }
.nav-mobile-menu.open a:nth-child(4) { transition-delay: 0.16s; }
.nav-mobile-menu.open a:nth-child(5) { transition-delay: 0.20s; }
.nav-mobile-menu.open a:nth-child(6) { transition-delay: 0.24s; }

/* Arrow on the right */
.nav-mobile-menu a::after {
    content: '›';
    font-size: 1rem;
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 0.18s ease, transform 0.18s ease;
    color: rgba(230, 43, 30, 0.7);
}

.nav-mobile-menu a:hover {
    color: rgba(255, 255, 255, 0.92);
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.10);
    transform: translateX(2px);
}

.nav-mobile-menu a:hover::after {
    opacity: 1;
    transform: translateX(0);
}

/* Book Now — red glowing pill */
.nav-mobile-menu a[href="booking.html"] {
    color: var(--ted-red) !important;
    background: rgba(230, 43, 30, 0.07);
    border-color: rgba(230, 43, 30, 0.22);
    font-weight: 800;
    margin-top: 4px;
}

.nav-mobile-menu a[href="booking.html"]:hover {
    background: rgba(230, 43, 30, 0.16);
    border-color: rgba(230, 43, 30, 0.5);
    box-shadow: 0 4px 20px rgba(230, 43, 30, 0.22);
    color: #fff !important;
    transform: translateX(2px);
}


/* ── Container & Layout ── */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
}

.section-light {
    background: var(--white);
    color: var(--black);
}

/* ── Section Header ── */
.section-header {
    margin-bottom: var(--space-16);
}

.section-label {
    display: inline-block;
    color: var(--ted-red);
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.section-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-400);
    margin-top: var(--space-4);
    max-width: 600px;
    line-height: 1.7;
}

.section-light .section-subtitle {
    color: var(--gray-600);
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 700;
    letter-spacing: 0.5px;
    border-radius: var(--border-radius);
    transition: all var(--transition);
    text-transform: uppercase;
    white-space: nowrap;
}

.btn-primary {
    background: var(--ted-red);
    color: var(--white);
    border: 2px solid var(--ted-red);
}

.btn-primary:hover {
    background: var(--ted-red-dark);
    border-color: var(--ted-red-dark);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--black);
    transform: translateY(-1px);
}

/* ── Cards ── */
.card {
    background: var(--gray-900);
    border: 1px solid var(--gray-800);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: transform var(--transition), border-color var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--ted-red);
}

/* ── Speaker Card ── */
.speaker-card {
    background: var(--gray-900);
    border: 1px solid var(--gray-800);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: transform var(--transition), border-color var(--transition);
    cursor: pointer;
}

.speaker-card:hover {
    transform: translateY(-6px);
    border-color: var(--ted-red);
}

.speaker-photo {
    width: 100%;
    aspect-ratio: 4/5;
    background: var(--gray-800);
    border-bottom: 1px solid var(--gray-700);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    color: var(--gray-600);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
}

.speaker-photo-icon {
    width: 60px;
    height: 60px;
    background: var(--gray-700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.speaker-info {
    padding: var(--space-6);
}

.speaker-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-1);
    color: var(--white);
}

.speaker-title {
    font-size: var(--font-size-sm);
    color: var(--ted-red);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-3);
}

.speaker-topic {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    line-height: 1.6;
}

/* ── Team Card ── */
.team-card {
    background: var(--gray-900);
    border: 1px solid var(--gray-800);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: transform var(--transition), border-color var(--transition);
}

.team-card:hover {
    transform: translateY(-4px);
    border-color: var(--gray-600);
}

.team-photo {
    width: 80px;
    height: 80px;
    background: var(--gray-800);
    border-radius: 50%;
    margin: 0 auto var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--gray-700);
}

.team-card-name {
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.team-card-role {
    font-size: var(--font-size-xs);
    color: var(--ted-red);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

/* ── Grids ── */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

/* ── Divider ── */
.divider {
    width: 60px;
    height: 3px;
    background: var(--ted-red);
    margin: var(--space-4) 0;
}

/* ── Scroll Reveal ── */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: none;
}

/* ── Page Header (inner pages) ── */
.page-header {
    padding: calc(var(--nav-height) + var(--space-16)) 0 var(--space-16);
    background: var(--black);
    border-bottom: 1px solid var(--gray-900);
}

.page-header-label {
    color: var(--ted-red);
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: var(--space-4);
}

.page-header-title {
    font-size: clamp(var(--font-size-4xl), 6vw, var(--font-size-7xl));
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1;
}

/* ── Team Section Header ── */
.team-section {
    margin-bottom: var(--space-16);
}

.team-section-heading {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin-bottom: var(--space-8);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.team-section-heading::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-800);
}

/* ── Speaker Filter Tabs ── */
.filter-tabs {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    margin-bottom: var(--space-8);
}

.filter-tab {
    padding: var(--space-2) var(--space-6);
    border: 1px solid var(--gray-700);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-400);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--ted-red);
    border-color: var(--ted-red);
    color: var(--white);
}

/* ── Speaker Modal ── */
.modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
}

.modal-backdrop.open {
    display: flex;
}

.modal {
    background: var(--gray-900);
    border: 1px solid var(--gray-800);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 560px;
    max-height: 85vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--space-6);
    border-bottom: 1px solid var(--gray-800);
    gap: var(--space-4);
}

.modal-close {
    font-size: var(--font-size-2xl);
    color: var(--gray-500);
    line-height: 1;
    flex-shrink: 0;
    transition: color var(--transition);
}

.modal-close:hover {
    color: var(--white);
}

.modal-body {
    padding: var(--space-6);
}

/* ── Gallery ── */
.gallery-grid {
    columns: 3;
    gap: var(--space-4);
    column-gap: var(--space-4);
}

.gallery-item {
    break-inside: avoid;
    margin-bottom: var(--space-4);
    border-radius: var(--border-radius);
    overflow: hidden;
    cursor: pointer;
    position: relative;
}

.gallery-placeholder {
    background: var(--gray-900);
    border: 1px dashed var(--gray-700);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    color: var(--gray-600);
    font-size: var(--font-size-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: border-color var(--transition);
}

.gallery-placeholder:hover {
    border-color: var(--ted-red);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(230, 43, 30, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

/* ── Lightbox ── */
.lightbox-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}

.lightbox-backdrop.open {
    display: flex;
}

.lightbox-close {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-size: var(--font-size-3xl);
    color: var(--gray-400);
    line-height: 1;
    transition: color var(--transition);
}

.lightbox-close:hover {
    color: var(--white);
}

.lightbox-inner {
    max-width: 90vw;
    max-height: 85vh;
}

.lightbox-placeholder {
    width: 640px;
    max-width: 90vw;
    height: 400px;
    background: var(--gray-900);
    border: 1px dashed var(--gray-700);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    color: var(--gray-600);
    font-size: var(--font-size-xs);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ── Timeline ── */
.timeline {
    position: relative;
    padding-left: var(--space-12);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-800);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-8);
}

.timeline-dot {
    position: absolute;
    left: calc(-12px - var(--space-12) + 6px);
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gray-700);
    border: 3px solid var(--gray-900);
    transition: background var(--transition);
}

.timeline-dot.active {
    background: var(--ted-red);
}

.timeline-time {
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--ted-red);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--space-2);
}

.timeline-content {
    background: var(--gray-900);
    border: 1px solid var(--gray-800);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    cursor: pointer;
    transition: border-color var(--transition);
}

.timeline-content:hover {
    border-color: var(--gray-600);
}

.timeline-content.open {
    border-color: var(--ted-red);
}

.timeline-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.timeline-expand-icon {
    color: var(--gray-600);
    font-size: var(--font-size-xl);
    transition: transform var(--transition);
    flex-shrink: 0;
}

.timeline-content.open .timeline-expand-icon {
    transform: rotate(180deg);
}

.timeline-details {
    display: none;
    margin-top: var(--space-4);
    color: var(--gray-400);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    border-top: 1px solid var(--gray-800);
    padding-top: var(--space-4);
}

.timeline-details.open {
    display: block;
}

/* ── Venue Detail ── */
.venue-detail-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--gray-800);
    align-items: flex-start;
}

.venue-detail-icon {
    font-size: var(--font-size-xl);
    flex-shrink: 0;
    width: 32px;
    text-align: center;
}

.venue-detail-label {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.venue-detail-value {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--white);
}

/* ── Utility ── */
.text-red {
    color: var(--ted-red);
}

/* Home About: "Learn About Us" glowing button */
.about-btn-wrap {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    margin-top: var(--space-4);
}

.about-btn {
    position: relative;
    width: 225px;
    height: 45px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-btn a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 30px;
    padding: 10px;
    letter-spacing: 1px;
    text-decoration: none;
    color: #fff;
    font-weight: 400;
    z-index: 1;
    backdrop-filter: blur(15px);
    overflow: hidden;
    transition: letter-spacing 0.25s ease, border-color 0.25s ease,
        box-shadow 0.25s ease, background 0.25s ease;
}

/* Clean hover: subtle red glow only, no frame */
.about-btn:hover a {
    letter-spacing: 2.5px;
    border-color: rgba(230, 43, 30, 0.7);
    background: rgba(230, 43, 30, 0.08);
    box-shadow: 0 0 18px rgba(230, 43, 30, 0.35), 0 0 40px rgba(230, 43, 30, 0.15);
}

/* Shine sweep inside the pill */
.about-btn a::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to left, rgba(255, 255, 255, 0.12), transparent);
    transform: skewX(45deg) translate(0);
    transition: transform 0.25s ease-out;
    pointer-events: none;
}

.about-btn:hover a::before {
    transform: skewX(45deg) translate(200px);
}



/* ── Responsive ── */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 70px;
    }

    .nav-links {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

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

    .gallery-grid {
        columns: 2;
    }
}

@media (max-width: 480px) {
    .gallery-grid {
        columns: 1;
    }

    .btn {
        padding: var(--space-3) var(--space-6);
        font-size: var(--font-size-sm);
    }
}

/* ── About Section ── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-media {
    position: relative;
}

.about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    justify-content: center;
    padding-left: 38px;
}

.about-video-box {
    width: 120%;
    margin-left: -5%;
    transform: translate(-38px, -38px);
    aspect-ratio: 16 / 9;
    border: none;
    border-radius: var(--border-radius-lg);
    background: var(--gray-900);
    position: relative;
    z-index: 2;
    box-shadow:
        0 0 0 1px rgba(230, 43, 30, 0.2),
        0 0 20px 4px rgba(230, 43, 30, 0.18),
        0 0 50px 10px rgba(230, 43, 30, 0.1),
        0 10px 40px rgba(0, 0, 0, 0.5);
    animation: videoEdgeGlow 5s ease-in-out infinite;
}

/* Subtle breathing edge glow on the video box itself */
@keyframes videoEdgeGlow {
    0%, 100% {
        box-shadow:
            0 0 0 1px rgba(230, 43, 30, 0.15),
            0 0 18px 3px rgba(230, 43, 30, 0.14),
            0 0 45px 8px rgba(230, 43, 30, 0.08),
            0 10px 40px rgba(0, 0, 0, 0.5);
    }
    50% {
        box-shadow:
            0 0 0 1px rgba(230, 43, 30, 0.30),
            0 0 28px 6px rgba(230, 43, 30, 0.22),
            0 0 65px 14px rgba(230, 43, 30, 0.12),
            0 10px 40px rgba(0, 0, 0, 0.5);
    }
}

/* Corner decor elements — hidden */
.video-decor {
    display: none;
}

/* Floating stat cards */
.about-stat {
    position: absolute;
    background: rgba(18, 18, 18, 0.82);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--gray-800);
    border-radius: var(--border-radius-lg);
    padding: var(--space-4) var(--space-6);
    min-width: 160px;
}

.about-stat--tr {
    top: var(--space-6);
    right: calc(-1 * var(--space-8));
}

.about-stat--bl {
    bottom: var(--space-6);
    left: calc(-1 * var(--space-8));
}

.about-stat__number {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--white);
    line-height: 1.1;
}

.about-stat__label {
    font-size: var(--font-size-xs);
    color: var(--gray-400);
    margin-top: var(--space-1);
    line-height: 1.5;
}

/* Feature checklist */
.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3) var(--space-6);
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--gray-300);
    line-height: 1.5;
}

.about-feature__check {
    color: var(--ted-red);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Responsive */
@media (max-width: 900px) {
    .about-stat--tr {
        right: var(--space-4);
    }

    .about-stat--bl {
        left: var(--space-4);
    }
}

@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    /* 1. Make the about video smaller on mobile */
    .about-video-box {
        width: 90% !important;
        margin-left: auto !important;
        margin-right: auto !important;
        transform: none !important;
    }

    .about-stat--tr {
        top: var(--space-4);
        right: var(--space-4);
    }

    .about-stat--bl {
        bottom: var(--space-4);
        left: var(--space-4);
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    /* Slightly reduce decorative tile size on small screens */
    .video-decor--tl {
        top: -1rem;
        left: -1rem;
        width: 4.5rem;
        height: 4.5rem;
        transform: scale(1.1);
    }

    .video-decor--br {
        bottom: -1rem;
        right: -1rem;
        width: 6rem;
        height: 6rem;
        transform: scale(1.05);
    }
}



/* ── Countdown Section ── */
.countdown-section {
    position: relative;
    padding: var(--space-12) 0;
    padding-bottom: 120px;
    background: transparent;
}


.countdown-section-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-16);
}

.countdown-section-header {
    text-align: center;
}

.countdown-section-header .section-label {
    display: inline-block;
    font-size: 0.975rem;
    font-weight: 900;
    font-family: 'Inter', sans-serif;
    letter-spacing: 6px;
    color: var(--ted-red);
    text-transform: uppercase;
}

.countdown-heading {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1;
    margin: var(--space-3) 0 var(--space-4);
}

.countdown-subtext {
    font-size: var(--font-size-lg);
    color: var(--gray-400);
    letter-spacing: 0.05em;
}

/* ── New Countdown Component ── */
.countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    padding: 0 1rem;
    flex-wrap: wrap;
}

/* Single unit (DAYS / HOURS / etc.) */
.countdown-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.countdown-unit:hover {
    transform: scale(1.05);
}

/* Number container with glow + border */
.number-container {
    position: relative;
}

/* Glow effect */
.glow-effect {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom right, rgba(220, 38, 38, 0.3), rgba(127, 29, 29, 0.3));
    border-radius: 1.5rem;
    filter: blur(40px);
    animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(1.1);
    }
}

/* Rotating gradient border */
.rotating-border {
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    background: linear-gradient(to right, rgb(220, 38, 38), rgb(147, 51, 234), rgb(220, 38, 38));
    border-radius: 1.5rem;
    opacity: 0.2;
    filter: blur(4px);
    animation: rotateBorder 8s linear infinite;
}

@keyframes rotateBorder {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* Digit pair row */
.digits-container {
    position: relative;
    display: flex;
    gap: 0.75rem;
}

/* Individual glass digit box */
.digit-box {
    position: relative;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: borderPulse 3s ease-in-out infinite;
}

@keyframes borderPulse {

    0%,
    100% {
        border-color: rgba(255, 255, 255, 0.1);
    }

    50% {
        border-color: rgba(239, 68, 68, 0.3);
    }
}

.digit-box:nth-child(2) {
    animation-delay: 0.5s;
}

/* Top shine overlay */
.top-shine {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), transparent);
}

/* Inner radial glow */
.inner-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom right, rgba(239, 68, 68, 0.1), transparent, rgba(168, 85, 247, 0.1));
}

/* Digit number wrapper + text */
.digit-number-wrapper {
    position: relative;
    padding: 1.5rem 1.25rem;
    overflow: hidden;
}

.digit-number {
    display: block;
    font-size: 72px;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.02em;
    background: linear-gradient(to bottom, white, white, rgba(255, 255, 255, 0.7));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Digit change animation */
@keyframes digitEnter {
    from {
        transform: translateY(-30px) scale(0.8);
        opacity: 0;
    }

    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.digit-change {
    animation: digitEnter 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Bottom red highlight */
.bottom-highlight {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(239, 68, 68, 0.5), transparent);
    animation: highlightPulse 2s ease-in-out infinite;
}

@keyframes highlightPulse {

    0%,
    100% {
        opacity: 0.3;
    }

    50% {
        opacity: 1;
    }
}

.digit-box:nth-child(2) .bottom-highlight {
    animation-delay: 0.2s;
}

/* Label pill beneath digit pair */
.countdown-label {
    margin-top: 1.25rem;
    padding: 0.375rem 1rem;
    border-radius: 9999px;
    background: linear-gradient(to right, rgba(220, 38, 38, 0.2), rgba(239, 68, 68, 0.2), rgba(220, 38, 38, 0.2));
    border: 1px solid rgba(239, 68, 68, 0.3);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    animation: labelPulse 2s ease-in-out infinite;
}

@keyframes labelPulse {

    0%,
    100% {
        box-shadow: 0 0 20px rgba(239, 68, 68, 0.2);
        transform: scale(1);
    }

    50% {
        box-shadow: 0 0 30px rgba(239, 68, 68, 0.4);
        transform: scale(1.02);
    }
}

.countdown-label span {
    color: rgb(248, 113, 113);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    font-weight: 700;
}

/* Separator dots between units */
.separator {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.separator-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: linear-gradient(to bottom right, rgb(239, 68, 68), rgb(185, 28, 28));
    animation: dotPulse 1.5s ease-in-out infinite;
}

.separator-dot:nth-child(2) {
    animation-delay: 0.75s;
}

@keyframes dotPulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.3);
        opacity: 1;
    }
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .digit-number {
        font-size: 60px;
    }

    .digit-number-wrapper {
        padding: 1.25rem 1rem;
    }
}

@media (max-width: 768px) {
    .countdown {
        gap: 1.5rem;
    }

    .digits-container {
        gap: 0.5rem;
    }

    .digit-number {
        font-size: 48px;
    }

    .digit-number-wrapper {
        padding: 1rem 0.75rem;
    }

    .countdown-label span {
        font-size: 0.75rem;
    }

    .countdown-heading {
        font-size: clamp(2.5rem, 10vw, 4rem);
    }
}

@media (max-width: 640px) {
    .countdown {
        gap: 1rem;
    }

    .digits-container {
        gap: 0.375rem;
    }

    .digit-number {
        font-size: 36px;
    }

    .digit-number-wrapper {
        padding: 0.75rem 0.5rem;
    }

    .countdown-label span {
        font-size: 0.625rem;
    }
}

@media (max-width: 480px) {
    .countdown {
        gap: 0.75rem;
    }

    .digit-number {
        font-size: 28px;
    }

    .digit-number-wrapper {
        padding: 0.5rem 0.375rem;
    }

    .countdown-heading {
        font-size: clamp(2rem, 12vw, 3.5rem);
    }
}

/* ── Global Loader ── */
.global-loader {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    background: #000;
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Promote to its own GPU compositor layer immediately */
    will-change: opacity;
    transform: translateZ(0);
    /* Opacity-only transition — never triggers layout or paint */
    transition: opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: all;
}

.global-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Video reduced to 70% of loader size (30% smaller) — GPU composited, no layout cost */
.global-loader video {
    position: absolute;
    left: 15%;
    top: 15%;
    width: 70%;
    height: 70%;
    object-fit: cover;
    border-radius: 4px;
    /* Keep video on its own layer so CPU never re-paints it */
    will-change: transform;
    transform: translateZ(0);
    /* Prevent flicker on some Chromium builds */
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    /* Prevent browser extensions (e.g. HoverZoom) from intercepting
       mouse events on the video element */
    pointer-events: none;
}

/* On mobile — reset the desktop inset positioning so the video fills the full screen */
@media (max-width: 768px) {
    .global-loader {
        /* Ensure the black background fills fully behind the contained video */
        background: #000;
    }
    .global-loader video {
        left: 50%;
        top: 50%;
        width: 100%;
        height: 100%;
        transform: translate(-50%, -50%) translateZ(0);
        border-radius: 0;
        /* contain: no cropping, whole video visible. Black bars filled by loader background */
        object-fit: contain;
    }
}

/* Transparent shield above the video — blocks extension hover detection
   while still allowing the loader to fade out and pointer events to
   reach the loader container itself */
.global-loader::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background: transparent;
    pointer-events: all;
}