/* ---------------------------------------------------- */
        /* 0. BASE & GLOBAL STYLES */
        /* ---------------------------------------------------- */
        :root {
            --bg-dark: #0d1117; /* GitHub Dark Theme Base */
            --card-bg: #161b22; /* Card background color (now unused for main background) */
            --accent-blue: #58a6ff;
            --live-neon: #00f0ff;
            --completed-green: #3fb950;
            --text-light: #c9d1d9;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-light);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 3rem 1rem;
            /* CRITICAL: Prevents horizontal scrolling */
            overflow-x: hidden; 
        }
        
        /* ---------------------------------------------------- */
        /* 1. ANIMATION KEYFRAMES (Enhanced) */
        /* ---------------------------------------------------- */
        /* Main section entrance (Staggered fade-in for cards) */
        @keyframes cardFadeIn {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Pulsing Glow for the LIVE badge */
        @keyframes pulseGlow {
            0% { box-shadow: 0 0 5px var(--live-neon); }
            50% { box-shadow: 0 0 15px var(--live-neon), 0 0 25px var(--live-neon); }
            100% { box-shadow: 0 0 5px var(--live-neon); }
        }
        
        /* Subtle, infinite glow pulse for the main title */
        @keyframes titlePulse {
            0% { text-shadow: 0 0 5px var(--accent-blue); }
            50% { text-shadow: 0 0 15px var(--live-neon), 0 0 10px #ff0077; }
            100% { text-shadow: 0 0 5px var(--accent-blue); }
        }
        
        /* Icon Spin on card hover */
        @keyframes iconSpin {
            0% { transform: rotate(0deg) scale(1); }
            50% { transform: rotate(180deg) scale(1.1); }
            100% { transform: rotate(360deg) scale(1); }
        }


        /* ---------------------------------------------------- */
        /* 2. SECTION TITLE (Animated and Responsive) */
        /* ---------------------------------------------------- */
        .section-title {
            /* Responsive font size using clamp */
            font-size: clamp(2rem, 5vw, 4rem);
            text-align: center;
            margin-bottom: 4rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            color: var(--text-light);
            
            position: relative;
            /* background: linear-gradient(90deg, #ff0077, var(--live-neon), #ff8800); */
            /* -webkit-background-clip: text; */
            -webkit-text-fill-color: transparent;
            
            animation: titlePulse 5s infinite alternate ease-in-out;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 150px;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
            margin: 1rem auto 0;
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-blue);
        }

        /* ---------------------------------------------------- */
        /* 3. CARD GRID & LAYOUT (Inherently Responsive) */
        /* ---------------------------------------------------- */
        .hackathon-section {
            width: 100%;
            max-width: 1400px;
            padding: 0 1rem;
        }

        .hackathon-cards {
            display: grid;
            /* CRITICAL: Auto-fit ensures 2/3 columns on larger screens, 
               and minmax guarantees a minimum card width of 300px */
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
            padding: 0 1rem;
        }

        .hackathon-card {
            /* Changed background to transparent as requested. Text remains visible against the dark body. */
            background: transparent; 
            padding: 2.5rem 2rem;
            border-radius: 12px;
            border: 1px solid rgba(88, 166, 255, 0.15);
            text-align: center;
            position: relative;
            overflow: hidden;
            
            transform-style: preserve-3d; 
            transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.27), 
                        box-shadow 0.6s ease-in-out, 
                        border-color 0.6s ease;
            
            opacity: 0;
            animation: cardFadeIn 0.8s ease-out forwards;
        }

        /* Staggered animation delay */
        .hackathon-card:nth-child(1) { animation-delay: 0.3s; } /* LIVE */
        .hackathon-card:nth-child(2) { animation-delay: 0.5s; } /* Completed */
        .hackathon-card:nth-child(3) { animation-delay: 0.7s; } /* Upcoming */

        /* ---------------------------------------------------- */
        /* 4. ANIMATED HOVER EFFECT */
        /* ---------------------------------------------------- */
        .hackathon-card:hover {
            /* 3D Tilt, Lift, and Shadow */
            transform: translateY(-15px) rotateX(5deg) rotateY(-5deg);
            
            /* Enhanced Neon Glow and Border */
            border-color: var(--live-neon); 
            box-shadow: 0 25px 40px rgba(0, 0, 0, 0.7), 
                        0 0 40px rgba(0, 240, 255, 0.5); 
            z-index: 10;
        }
        
        .hackathon-card:hover .hackathon-icon {
            animation: iconSpin 0.7s ease-in-out forwards;
        }

        /* ---------------------------------------------------- */
        /* 5. CARD CONTENT & BADGES */
        /* ---------------------------------------------------- */
        .hackathon-icon {
            font-size: 3rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 0 10px var(--live-neon);
            transition: transform 0.6s; 
        }
        
        .hackathon-card h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: var(--accent-blue);
        }
        
        .hackathon-card p {
            color: var(--text-light);
            line-height: 1.6;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }

        .status-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            padding: 0.4rem 0.8rem;
            border-radius: 5px;
            font-weight: bold;
            font-size: 0.8rem;
            text-transform: uppercase;
        }
        
        .live-badge {
            background-color: var(--live-neon);
            color: var(--bg-dark);
            box-shadow: 0 0 10px var(--live-neon);
            animation: pulseGlow 2s infinite alternate; 
        }
        
        .completed-badge {
            background-color: var(--completed-green);
            color: var(--bg-dark);
            box-shadow: 0 0 5px var(--completed-green);
        }

        .upcoming-badge {
            background-color: #f7b243;
            color: var(--bg-dark);
            box-shadow: 0 0 5px #f7b243;
        }

        /* ---------------------------------------------------- */
        /* 6. RESPONSIVENESS (Explicit Breakpoints) */
        /* ---------------------------------------------------- */
        
        /* Tablet Optimization (Ensures better spacing when 2 columns are active) */
        @media (max-width: 1200px) {
            .hackathon-cards {
                gap: 1.5rem;
            }
        }

        /* Mobile Screens (Phones and small tablets) */
        @media (max-width: 768px) {
            .hackathon-cards {
                /* Force single column layout */
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .section-title {
                /* Scale title down further for smaller screens */
                font-size: 2.2rem;
                margin-bottom: 2rem;
            }
            .hackathon-card {
                /* Reduce padding */
                padding: 1.5rem 1rem;
            }
            
            /* Simplify hover effect for touchscreens (less dramatic lift) */
            .hackathon-card:hover {
                transform: translateY(-5px);
                box-shadow: 0 15px 25px rgba(0, 0, 0, 0.5);
            }
        }