:root {
    --blue: #0a0f2c;
    --purple: #3a0ca3;
    --gold: #f5c518;
    --white: #ffffff;
    --dark-blue: #060b22;
    --grad-gold: linear-gradient(135deg, #f5c518, #ffdd55);
    --shadow: 0 25px 40px -12px rgba(0,0,0,0.4);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--blue);
    color: var(--white);
    scroll-behavior: smooth;
    overflow-x: hidden;
}

/* custom scroll */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #0f142e;
}
::-webkit-scrollbar-thumb {
    background: var(--gold);
    border-radius: 10px;
}

/* NAV */
#mainNav {
    background: rgba(10, 15, 44, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(245, 197, 24, 0.25);
    padding: 18px 0;
}
 
#mainNav .navbar-brand {
    font-size: 1.9rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--gold), #ffdd77);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}
 
#mainNav .nav-link {
    color: white;
    font-weight: 500;
    transition: 0.2s;
}
 
#mainNav .nav-link:hover {
    color: var(--gold);
}
 
#mainNav .cta {
    background: var(--gold);
    color: black !important;
    padding: 8px 20px;
    border-radius: 40px;
    font-weight: bold;
    transition: 0.2s;
}
 
#mainNav .cta:hover {
    background: #ffdd55;
    transform: scale(1.02);
}
 
/* Mobile dropdown background */
@media (max-width: 767px) {
    #navLinks {
        background: rgba(10, 15, 44, 0.97);
        padding: 12px 0;
    }
}

/* CUSTOM TOGGLER */
.custom-toggler {
    width: 40px;
    height: 40px;
    position: relative;
    transition: 0.3s ease-in-out;
}

.custom-toggler:focus {
    box-shadow: none;
}

/* LINES */
.toggler-icon {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: var(--gold);
    border-radius: 10px;
    left: 0;
    transition: 0.25s ease-in-out;
}

/* POSITIONING */
.top-bar {
    top: 8px;
}

.middle-bar {
    top: 18px;
}

.bottom-bar {
    top: 28px;
}

/* ANIMATION TO X */
.custom-toggler[aria-expanded="true"] .top-bar {
    transform: rotate(45deg);
    top: 18px;
}

.custom-toggler[aria-expanded="true"] .middle-bar {
    opacity: 0;
}

.custom-toggler[aria-expanded="true"] .bottom-bar {
    transform: rotate(-45deg);
    top: 18px;
}


/* HERO */
.hero {
    height: 100vh;
    background: linear-gradient(125deg, rgba(10,15,44,0.85), rgba(58,12,163,0.75));
    background-size: cover;
    background-position: center 30%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    will-change: transform;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

.hero-slide.zooming {
    animation: slowZoom 20s ease-in-out forwards;
}

@keyframes slowZoom {
    0% {
        transform: scale(1);
    }
    100% {
        transform: scale(2.19);
    }
}

/* Sideways scrolling effect for background position */
.hero-slide.scrolling {
    animation: sideScroll 25s ease-in-out infinite alternate;
}

@keyframes sideScroll {
    0% {
        background-position: 0% center;
    }
    100% {
        background-position: 100% center;
    }
}

/* Overlay gradient to keep text readable */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(125deg, rgba(10,15,44,0.75), rgba(58,12,163,0.65));
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 850px;
    padding: 0 20px;
    animation: fadeUp 1s ease;
}

.hero-badge {
    background: rgba(245,197,24,0.2);
    backdrop-filter: blur(4px);
    display: inline-block;
    padding: 6px 18px;
    border-radius: 40px;
    font-size: 0.8rem;
    letter-spacing: 1px;
    margin-bottom: 20px;
    border-left: 2px solid var(--gold);
}

.hero h1 {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero span {
    color: var(--gold);
    text-shadow: 0 0 8px rgba(245,197,24,0.5);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--gold);
    color: #0a0f2c;
    border: none;
    padding: 14px 32px;
    font-weight: bold;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: 0.25s;
    font-weight: 700;
}

.btn-primary:hover {
    background: #ffdd66;
    transform: translateY(-3px);
    box-shadow: 0 12px 20px -8px rgba(0,0,0,0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--gold);
    color: white;
    padding: 12px 28px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: 0.2s;
}

.btn-outline:hover {
    background: rgba(245,197,24,0.2);
    transform: translateY(-2px);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 12px;
    opacity: 0.7;
    gap: 5px;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(60px);}
    to { opacity: 1; transform: translateY(0);}
}

/* FEATURES */
.features {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    padding: 80px 5%;
    background: white;
    color: black;
    gap: 30px;
}

.feature {
    text-align: center;
    max-width: 240px;
    transition: all 0.3s;
    padding: 20px 10px;
    border-radius: 28px;
}

.feature:hover {
    transform: translateY(-8px);
}

.circle {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    box-shadow: 0 15px 25px -8px rgba(0,0,0,0.2);
}

.blue { background: #1e3a8a; }
.purple { background: #6a0dad; }
.gold { background: #d4a017; }

.feature h3 {
    margin-bottom: 8px;
    font-size: 1.6rem;
    font-weight: 700;
}

.feature p {
    color: #444;
}

/* ABOUT */
.about {
    padding: 80px 5%;
    background: linear-gradient(115deg, var(--purple), var(--blue));
}

.about-container {
    display: flex;
    gap: 50px;
    align-items: center;
    flex-wrap: wrap;
    max-width: 1300px;
    margin: auto;
}

.about-text {
    flex: 1;
}

.about-text h2 {
    font-size: 2.7rem;
    margin-bottom: 20px;
}

.about-line {
    width: 70px;
    height: 4px;
    background: var(--gold);
    margin-bottom: 25px;
    border-radius: 4px;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 35px;
}

.about-stats {
    display: flex;
    gap: 35px;
    margin-bottom: 35px;
    flex-wrap: wrap;
}

.about-stats div {
    text-align: center;
}

.about-stats strong {
    display: block;
    font-size: 2rem;
    color: var(--gold);
}

.about-stats span {
    font-size: 0.9rem;
    opacity: 0.8;
}

.about-image {
    flex: 1;
    position: relative;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: 0.4s;
}

.about-image:hover img {
    transform: scale(1.02);
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, rgba(58,12,163,0.3), transparent);
}

.btn-gold {
    background: var(--gold);
    border: none;
    padding: 14px 28px;
    font-weight: bold;
    font-size: 1rem;
    border-radius: 40px;
    cursor: pointer;
    transition: 0.2s;
}

.btn-gold:hover {
    background: #e0b115;
    transform: scale(1.02);
}

/* SPEAKERS */
.speakers {
    padding: 80px 5%;
    text-align: center;
    background: #f8f9fc;
    color: black;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--blue);
}

.section-header p {
    color: #4a5568;
    margin-top: 10px;
}

.grid {
    display: flex;
    gap: 30px;
    justify-content: center;
    margin-top: 50px;
    flex-wrap: wrap;
}

.card {
    flex: 1;
    min-width: 210px;
    background: white;
    border-radius: 28px;
    padding: 25px 15px;
    transition: 0.3s;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    text-align: center;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 35px -15px rgba(0,0,0,0.2);
}

.card-img {
    width: 130px;
    height: 130px;
    margin: 0 auto 18px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--gold);
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card h3 {
    font-size: 1.5rem;
    margin: 12px 0 4px;
}

.card .title {
    color: #6c757d;
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.social-icons i {
    margin: 0 8px;
    color: var(--purple);
    cursor: pointer;
    transition: 0.2s;
    font-size: 1.2rem;
}

.social-icons i:hover {
    color: var(--gold);
}



/* NAVIGATION BUTTONS */
.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    padding: 15px;
    cursor: pointer;
    font-size: 24px;
    border-radius: 50%;
    z-index: 10;
}

.prev {
    left: 15px;
}

.next {
    right: 15px;
}

.nav-btn:hover {
    background: rgba(0,0,0,0.8);
}

/* THUMBNAILS */
.thumbnails {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    margin-top: 20px;
    padding-bottom: 10px;
}

.thumbnails::-webkit-scrollbar {
    height: 8px;
}

.thumbnails::-webkit-scrollbar-thumb {
    background: var(--gold);
    border-radius: 10px;
}

.thumb {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
    cursor: pointer;
    opacity: 0.6;
    transition: 0.3s;
    border: 3px solid transparent;
}

.thumb:hover {
    opacity: 1;
    transform: scale(1.05);
}

.thumb.active {
    opacity: 1;
    border-color: var(--gold);
}
/* LIGHTBOX */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    justify-content: center;
    align-items: center;
}

.lightbox img {
    max-width: 90%;
    max-height: 80%;
}

#close {
    position: absolute;
    top: 20px;
    right: 40px;
    font-size: 40px;
    color: white;
    cursor: pointer;
}

/* CTA SECTION with timer */
.cta-section {
    padding: 80px 5%;
    text-align: center;
    background: linear-gradient(135deg, var(--blue), #111635);
}

.cta-section h2 {
    font-size: 2.8rem;
    margin-bottom: 15px;
}

.timer-container {
    background: rgba(0,0,0,0.35);
    display: inline-block;
    padding: 10px 35px;
    border-radius: 70px;
    margin: 30px auto;
    backdrop-filter: blur(6px);
}

.timer {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 6px;
    background: linear-gradient(135deg, #fff, var(--gold));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.btn-large-gold {
    background: var(--gold);
    padding: 16px 40px;
    font-size: 1.2rem;
    font-weight: bold;
    border: none;
    border-radius: 60px;
    cursor: pointer;
    transition: 0.25s;
    margin-bottom: 20px;
}

.btn-large-gold:hover {
    background: #ffdd55;
    transform: scale(1.02);
    box-shadow: 0 10px 20px rgba(245,197,24,0.3);
}

.venue-info {
    margin-top: 25px;
    font-size: 1rem;
    opacity: 0.8;
}

/* FOOTER */
footer {
    background: #030617;
    padding: 45px 5% 25px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    border-bottom: 1px solid rgba(245,197,24,0.2);
    padding-bottom: 25px;
}

.footer-content h3 {
    font-size: 1.8rem;
    color: var(--gold);
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    margin-left: 25px;
    transition: 0.2s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 25px;
    font-size: 0.8rem;
    opacity: 0.6;
}

/* MOBILE RESPONSIVE */
@media(max-width: 768px){
    nav {
        padding: 12px 5%;
    }
    nav h2 {
        font-size: 1.5rem;
    }
    nav a {
        margin-left: 14px;
        font-size: 0.85rem;
    }
    .hero h1 {
        font-size: 2.8rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    .features {
        flex-direction: column;
        align-items: center;
    }
    .about-container {
        flex-direction: column;
    }
    .grid {
        flex-direction: column;
        align-items: center;
    }
    .timer {
        font-size: 1.9rem;
        letter-spacing: 2px;
    }
    .cta-section h2 {
        font-size: 2rem;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    .footer-links a {
        margin: 0 12px;
    }
}