:root {
            --burnt-orange: #ffdc3f;
            --pure-orange: #ffb947;
            --black: #2e2833;
            --white: #FFFFFF;
            --gray-900: #2b1e1e;
        }

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

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

        /* --- UI UTILITIES --- */
        .headline-massive {
            font-weight: 900;
            text-transform: uppercase;
            line-height: 0.85;
            letter-spacing: -0.05em;
            font-size: clamp(4rem, 18vw, 15rem);
        }

        .text-pilot { letter-spacing: 0.2em; text-transform: uppercase; font-weight: 700; }

        /* --- GRAIN OVERLAY --- */
        .grain-overlay {
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: url("https://grainy-gradients.vercel.app/noise.svg");
            opacity: 0.04;
            pointer-events: none;
            z-index: 9999;
        }

        /* --- SCROLL SECTIONS --- */
        .scene {
            position: relative;
            min-height: 100vh;
            width: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 5vw;
            overflow: hidden;
        }

        /* --- HEADER --- */
        header {
            position: fixed;
            top: 0; left: 0; width: 100%;
            padding: 2rem 5vw;
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 1000;
            transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
            opacity: 0;
            transform: translateY(-100%);
        }
        header.active { opacity: 1; transform: translateY(0); }
        header.scrolled { background: rgba(0,0,0,0.9); backdrop-filter: blur(10px); padding: 1rem 5vw; border-bottom: 1px solid rgba(255,255,255,0.1); }

        /* --- HORIZONTAL SYSTEM --- */
        .horiz-container {
            width: 400vw;
            display: flex;
            height: 100vh;
            will-change: transform;
        }
        .horiz-slide {
            width: 100vw;
            height: 100vh;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            padding: 5vw;
            position: relative;
        }

        /* --- SPLIT EXPERIENCE --- */
        .split-box {
            height: 50vh;
            width: 100%;
            transition: height 0.8s cubic-bezier(0.16, 1, 0.3, 1);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        /* --- SUBPAGE SYSTEM --- */
        #subpage-overlay {
            position: fixed;
            inset: 0;
            background: var(--black);
            z-index: 5000;
            display: none;
            overflow-y: auto;
            padding: 10vh 5vw;
        }

        /* --- CUSTOM BUTTONS --- */
        .btn-action {
            padding: 1.25rem 3rem;
            font-weight: 900;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }
        .btn-action-primary { background: var(--black); color: var(--white); border: 2px solid var(--black); }
        .btn-action-primary:hover { background: transparent; color: var(--black); transform: scale(1.05); }
        
        .btn-action-outline { border: 2px solid var(--black); color: var(--black); }
        .btn-action-outline:hover { background: var(--black); color: var(--white); }

        /* --- ANIMATIONS --- */
        .fade-up { opacity: 0; transform: translateY(40px); transition: 1s cubic-bezier(0.16, 1, 0.3, 1); }
        .fade-up.active { opacity: 1; transform: translateY(0); }

        .line-draw {
            stroke-dasharray: 1000;
            stroke-dashoffset: 1000;
            transition: stroke-dashoffset 3s ease;
        }
        .active .line-draw { stroke-dashoffset: 0; }

        .bg-pulse {
            animation: pulse-bg 8s infinite alternate;
        }
        @keyframes pulse-bg {
            0% { transform: scale(1); opacity: 0.3; }
            100% { transform: scale(1.1); opacity: 0.5; }
        }