/* Advanced neon text glow */
.neon-text {
    text-shadow: 0 0 5px #00f3ff,
        0 0 10px #00f3ff,
        0 0 15px #00f3ff,
        0 0 20px #9d4edd,
        0 0 35px #9d4edd;
    animation: neon-pulse 1.5s ease-in-out infinite alternate;
}

@keyframes neon-pulse {
    from {
        text-shadow: 0 0 5px #00f3ff,
            0 0 10px #00f3ff,
            0 0 15px #00f3ff,
            0 0 20px #9d4edd;
    }

    to {
        text-shadow: 0 0 10px #00f3ff,
            0 0 20px #00f3ff,
            0 0 30px #00f3ff,
            0 0 40px #9d4edd,
            0 0 50px #9d4edd;
    }
}

/* ============================================
   TOP-LEFT LOGO CONTAINER
   ============================================ */

.logo-container {
    transition: all 0.3s ease;
    text-decoration: none;
}

.logo-container:hover {
    transform: scale(1.05);
}

.logo-container:hover .logo-3d {
    animation-duration: 3s;
}

/* ============================================
   BACKGROUND VIDEO STYLING
   ============================================ */

#hero-video,
.hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: 0;
    filter: brightness(0.9) contrast(1.15) saturate(1.1);
    -webkit-user-select: none;
    user-select: none;
    pointer-events: none;
}

/* Mobile Video Optimization */
@media (max-width: 768px) {

    #hero-video,
    .hero-video {
        filter: brightness(0.85) contrast(1.2) saturate(1.15);
        /* Ensure video doesn't cause layout shifts on mobile */
        -webkit-backface-visibility: hidden;
        backface-visibility: hidden;
    }
}

/* Tablet Optimization */
@media (min-width: 769px) and (max-width: 1024px) {

    #hero-video,
    .hero-video {
        filter: brightness(0.88) contrast(1.18) saturate(1.12);
    }
}

/* Large Screens */
@media (min-width: 1025px) {

    #hero-video,
    .hero-video {
        filter: brightness(0.9) contrast(1.15) saturate(1.1);
    }
}

/* Disable video on very low-end devices for performance */
@media (max-width: 480px) and (hover: none) and (pointer: coarse) {

    #hero-video,
    .hero-video {
        /* Video will still play but with reduced quality settings */
        filter: brightness(0.8) contrast(1.25) saturate(1.2);
    }
}

/* High DPI/Retina displays */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {

    #hero-video,
    .hero-video {
        /* Enhance quality on high DPI screens */
        filter: brightness(0.92) contrast(1.12) saturate(1.08);
    }
}

/* Reduced motion accessibility */
@media (prefers-reduced-motion: reduce) {

    #hero-video,
    .hero-video {
        display: none;
    }
}

/* 3D card flip effect */
.flip-card {
    perspective: 1000px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 20px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.flip-card-front {
    background: linear-gradient(135deg, rgba(30, 30, 40, 0.9) 0%, rgba(50, 50, 70, 0.9) 100%);
    border: 2px solid rgba(0, 243, 255, 0.3);
    color: white;
}

.flip-card-back {
    background: linear-gradient(135deg, rgba(50, 50, 70, 0.9) 0%, rgba(30, 30, 40, 0.9) 100%);
    border: 2px solid rgba(157, 78, 221, 0.3);
    color: white;
    transform: rotateY(180deg);
}

/* Parallax scrolling effect */
.parallax-section {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* Event card styling */
.event-card {
    background: rgba(30, 30, 40, 0.8);
    border: 1px solid transparent;
    border-radius: 15px;
    padding: 1.5rem;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.event-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #00f3ff, #9d4edd);
    opacity: 0;
    transition: opacity 0.4s;
}

.event-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 243, 255, 0.2);
}

.event-card:hover::before {
    opacity: 1;
}

/* Register button */
.register-btn {
    background: linear-gradient(90deg, #00f3ff, #9d4edd);
    border: none;
    border-radius: 10px;
    color: #0a0a0f;
    font-weight: bold;
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.register-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #9d4edd, #00f3ff);
    transition: left 0.5s;
    z-index: -1;
}

.register-btn:hover {
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.7);
}

.register-btn:hover::before {
    left: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .countdown-number {
        font-size: 2.5rem;
    }

    .category-card {
        padding: 1.5rem;
    }

    .neon-btn {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}

/* Category navigation buttons */
.category-nav-btn {
    padding: 0.8rem 1.5rem;
    background: rgba(30, 30, 40, 0.8);
    border: 2px solid rgba(0, 243, 255, 0.3);
    border-radius: 50px;
    color: white;
    font-weight: bold;
    transition: all 0.3s;
    cursor: pointer;
}

.category-nav-btn:hover {
    border-color: #00f3ff;
    background: rgba(0, 243, 255, 0.1);
}

.category-nav-btn.active {
    background: linear-gradient(90deg, #00f3ff, #9d4edd);
    border-color: transparent;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.5);
}

/* Event card details */
.event-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
    margin-bottom: 0.5rem;
}

.event-desc {
    color: #a0a0c0;
    font-size: 0.9rem;
}

.event-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.event-tag {
    background: rgba(0, 243, 255, 0.1);
    color: #00f3ff;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.detail-item {
    display: flex;
    align-items: center;
    color: #a0a0c0;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* Responsive adjustments for mobile */
@media (max-width: 768px) {
    .event-card {
        padding: 1.2rem;
    }

    .event-title {
        font-size: 1.2rem;
    }

    .category-nav-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}

/* Mobile Responsive Enhancements */

/* Extra small devices (phones, 600px and down) */
@media (max-width: 600px) {

    .category-card,
    .event-card,
    .sponsor-card,
    .patron-card,
    .member-card,
    .organiser-card,
    .stat-card,
    .prize-card {
        padding: 1.2rem;
    }

    .event-title,
    .patron-name,
    .member-name,
    .organiser-name {
        font-size: 1rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .sponsor-logo {
        max-width: 150px;
        max-height: 80px;
    }

    /* Timeline adjustments */
    .timeline {
        padding-left: 1.5rem;
    }

    .timeline-item {
        padding-left: 1rem;
    }

    /* Table responsiveness */
    .overflow-x-auto {
        width: 100%;
        overflow-x: auto;
    }

    /* Hero section adjustments */
    .text-5xl {
        font-size: 2.5rem;
    }

    .text-7xl {
        font-size: 3rem;
    }

    /* Reduce padding on mobile */
    section {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* Mobile menu improvements */
    #mobile-menu {
        width: 90%;
        max-width: 300px;
        right: 1rem;
    }

    /* Countdown adjustments */
    .countdown-number {
        font-size: 2rem;
    }

    .countdown-box {
        padding: 1rem;
    }
}

/* Small devices (portrait tablets and large phones, 600px to 768px) */
@media (min-width: 600px) and (max-width: 768px) {
    .sponsor-card {
        padding: 2rem 1.5rem;
    }

    .stat-number {
        font-size: 3rem;
    }

    .text-7xl {
        font-size: 4rem;
    }
}

/* Medium devices (landscape tablets, 768px to 992px) */
@media (min-width: 768px) and (max-width: 992px) {
    .grid-cols-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .grid-cols-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Touch-friendly button sizing */
@media (hover: none) and (pointer: coarse) {

    .register-btn,
    .neon-btn,
    .filter-btn,
    .dept-btn {
        padding: 0.8rem 1.5rem;
        min-height: 44px;
        /* Minimum touch target size */
    }

    .contact-btn {
        width: 44px;
        height: 44px;
    }

    /* Increase tap targets for mobile */
    a,
    button {
        min-height: 44px;
        min-width: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* Prevent text selection on interactive elements */
.neon-btn,
.register-btn,
.filter-btn,
.dept-btn,
.category-nav-btn,
.contact-btn {
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
}

/* Improve mobile form input */
@media (max-width: 768px) {

    input,
    select,
    textarea {
        font-size: 16px;
        /* Prevents iOS zoom on focus */
    }

    .contact-input,
    .search-input {
        font-size: 1rem;
        padding: 0.9rem 1rem;
    }
}

/* Fix for mobile viewport height */
.mobile-vh-fix {
    min-height: calc(var(--vh, 1vh) * 100);
}

/* Image optimization for mobile */
img {
    max-width: 100%;
    height: auto;
}

/* Card flip adjustment for mobile */
@media (max-width: 768px) {
    .flip-card {
        perspective: none;
    }

    .flip-card-inner {
        transition: none;
        transform: none;
    }

    .flip-card:hover .flip-card-inner {
        transform: none;
    }

    .flip-card-front,
    .flip-card-back {
        position: relative;
        height: auto;
        -webkit-backface-visibility: visible;
        backface-visibility: visible;
        transform: none;
    }

    .flip-card-back {
        display: none;
    }

    .event-card:hover .flip-card-back {
        display: block;
    }
}

/* Countdown Styles */
.countdown-box {
    background: rgba(18, 18, 26, 0.8);
    border: 2px solid rgba(0, 243, 255, 0.3);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    min-width: 80px;
    transition: all 0.3s ease;
}

.countdown-box:hover {
    border-color: rgba(157, 78, 221, 0.5);
    transform: translateY(-5px);
}

.countdown-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: #00ffff;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.7);
    padding: 0.5rem;
    font-family: 'Orbitron', sans-serif;
}

.countdown-label {
    font-size: 0.875rem;
    color: #9d4edd;
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Mobile Menu Dropdown Animation */
#mobile-events-dropdown {
    transition: all 0.3s ease;
    max-height: 0;
    overflow: hidden;
}

#mobile-events-dropdown.show {
    max-height: 300px;
}

/* ============================================
   MIRROR EFFECT FOR CATEGORY CARDS
   ============================================ */

.mirror-card {
    position: relative;
    perspective: 1000px;
    transform-style: preserve-3d;
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mirror-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
            rgba(255, 255, 255, 0.1) 0%,
            rgba(255, 255, 255, 0) 50%,
            rgba(0, 0, 0, 0.1) 100%);
    border-radius: 15px;
    pointer-events: none;
    z-index: 10;
}

.mirror-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 30%,
            rgba(0, 243, 255, 0.3) 0%,
            transparent 50%);
    border-radius: 15px;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 9;
}

.mirror-card:hover {
    transform: rotateX(5deg) rotateY(10deg) translateZ(20px);
    box-shadow:
        0 20px 40px rgba(0, 243, 255, 0.3),
        inset -2px -2px 5px rgba(0, 243, 255, 0.2),
        inset 2px 2px 5px rgba(157, 78, 221, 0.2);
}

.mirror-card:hover::after {
    opacity: 1;
}

/* 3D Mirror reflection effect */
.mirror-card::before {
    background:
        linear-gradient(135deg,
            rgba(255, 255, 255, 0.15) 0%,
            rgba(255, 255, 255, 0.05) 30%,
            transparent 50%,
            rgba(0, 0, 0, 0.05) 80%,
            rgba(0, 0, 0, 0.15) 100%);
    box-shadow: inset -1px -1px 3px rgba(0, 243, 255, 0.2), inset 1px 1px 3px rgba(157, 78, 221, 0.1);
}

/* ============================================
   3D ANIMATED LOGO
   ============================================ */

.logo-3d {
    display: inline-block;
    animation: logo-3d-spin 8s linear infinite;
    transform-style: preserve-3d;
    perspective: 1000px;
    filter: drop-shadow(0 0 15px rgba(0, 243, 255, 0.6)) drop-shadow(0 0 25px rgba(157, 78, 221, 0.4));
    transition: all 0.3s ease;
}

.logo-3d:hover {
    animation-duration: 4s;
    filter: drop-shadow(0 0 20px rgba(0, 243, 255, 0.8)) drop-shadow(0 0 35px rgba(157, 78, 221, 0.6)) drop-shadow(0 0 50px rgba(0, 255, 255, 0.3));
}

@keyframes logo-3d-spin {
    0% {
        transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg);
    }

    25% {
        transform: rotateX(10deg) rotateY(90deg) rotateZ(0deg);
    }

    50% {
        transform: rotateX(0deg) rotateY(180deg) rotateZ(10deg);
    }

    75% {
        transform: rotateX(-10deg) rotateY(270deg) rotateZ(0deg);
    }

    100% {
        transform: rotateX(0deg) rotateY(360deg) rotateZ(0deg);
    }
}

/* Alternative smooth 3D rotation for logo */
.logo-3d {
    animation: logo-3d-smooth 10s ease-in-out infinite;
}

@keyframes logo-3d-smooth {

    0%,
    100% {
        transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg) scale(1);
    }

    25% {
        transform: rotateX(15deg) rotateY(45deg) rotateZ(5deg) scale(1.05);
    }

    50% {
        transform: rotateX(-10deg) rotateY(180deg) rotateZ(-5deg) scale(1.08);
    }

    75% {
        transform: rotateX(10deg) rotateY(315deg) rotateZ(3deg) scale(1.05);
    }
}

/* Glow effect on logo */
@keyframes logo-glow {

    0%,
    100% {
        filter: drop-shadow(0 0 15px rgba(0, 243, 255, 0.6)) drop-shadow(0 0 25px rgba(157, 78, 221, 0.4));
    }

    50% {
        filter: drop-shadow(0 0 25px rgba(0, 243, 255, 0.8)) drop-shadow(0 0 35px rgba(157, 78, 221, 0.6));
    }
}