/* Bilal Bursal */

        :root {
            --zemin-rengi: #000000;
            --yazi-rengi: #ffffff;
            --yazi-ikincil: #888888;
            --cerceve-rengi: rgba(255, 255, 255, 0.15);
            --cam-efekti: rgba(255, 255, 255, 0.05);
            --vurgu-rengi: #ffffff;
            --animasyon-egrisi: cubic-bezier(0.19, 1, 0.22, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            outline: none;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            background-color: var(--zemin-rengi);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            color: var(--yazi-rengi);
            height: 100vh; 
            height: 100dvh;
            width: 100vw;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            perspective: 1000px;
        }

        .uzay-tuneli {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 0;
            pointer-events: none;
            transform-style: preserve-3d;
        }

        .halka {
            position: absolute;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.5);
            opacity: 0;
            box-shadow: 0 0 40px rgba(255, 255, 255, 0.05);
        }

        .halka:nth-child(1) { width: 10vw; height: 10vw; animation: tünelAkisi 3s infinite linear 0s; }
        .halka:nth-child(2) { width: 30vw; height: 30vw; animation: tünelAkisi 3s infinite linear 0.6s; }
        .halka:nth-child(3) { width: 60vw; height: 60vw; animation: tünelAkisi 3s infinite linear 1.2s; }
        .halka:nth-child(4) { width: 100vw; height: 100vw; animation: tünelAkisi 3s infinite linear 1.8s; }
        .halka:nth-child(5) { width: 150vw; height: 150vw; animation: tünelAkisi 3s infinite linear 2.4s; }

        body.baslangic-modu .halka {
            animation-duration: 0.8s;
            border-width: 2px;
            border-color: rgba(255, 255, 255, 0.3);
        }

        @keyframes tünelAkisi {
            0% { transform: translateZ(-1000px) scale(0.1); opacity: 0; }
            40% { opacity: 0.6; }
            100% { transform: translateZ(500px) scale(1.5); opacity: 0; }
        }

        .karanlik-perde {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle, transparent 20%, #000000 120%);
            z-index: 1;
            pointer-events: none;
        }

        .ana-sahne {
            position: relative;
            z-index: 10;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2rem;
            
            opacity: 0;
            transform: scale(0.92);
            filter: blur(12px);
            transition: all 1.8s var(--animasyon-egrisi);
        }

        body.yuklendi .ana-sahne {
            opacity: 1;
            transform: scale(1);
            filter: blur(0);
        }

        .baslik {
            font-size: clamp(3rem, 10vw, 6rem);
            font-weight: 900;
            letter-spacing: -0.05em;
            line-height: 1;
            margin: 0;
            text-transform: uppercase;
            background: linear-gradient(180deg, #fff 40%, #444 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .alt-metin {
            font-size: clamp(0.75rem, 2.5vw, 1rem);
            color: var(--yazi-ikincil);
            letter-spacing: 0.4em;
            /* text-transform: uppercase; */
            font-weight: 500;
        }

        .navigasyon {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .ikon-butonu {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: var(--cam-efekti);
            border: 1px solid var(--cerceve-rengi);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.4s var(--animasyon-egrisi);
            position: relative;
        }

        .ikon-butonu svg {
            width: 24px;
            height: 24px;
            fill: var(--yazi-rengi);
            transition: transform 0.4s var(--animasyon-egrisi);
        }

        .ikon-butonu:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-8px);
            border-color: rgba(255, 255, 255, 0.4);
            box-shadow: 0 20px 40px -10px rgba(0,0,0,0.8);
        }

        .ikon-butonu:hover svg {
            transform: scale(1.1);
        }
        
        .ikon-butonu.aktif {
            background: var(--yazi-rengi);
            border-color: var(--yazi-rengi);
        }
        
        .ikon-butonu.aktif svg {
            fill: #000;
        }

        .bilgi-kutusu {
            position: absolute;
            background: #111;
            padding: 12px 10px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            letter-spacing: 0.05em;
            
            opacity: 0;
            pointer-events: none;
            transform: translate(-50%, 10px) scale(0.9);
            transition: all 0.4s var(--animasyon-egrisi);
            z-index: 100;
            box-shadow: 0 20px 50px rgba(0,0,0,0.9);
            white-space: nowrap;
            
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .bilgi-kutusu::before {
            content: '';
            position: absolute;
            top: -6px;
            left: 50%;
            transform: translateX(-50%);
            border-left: 6px solid transparent;
            border-right: 6px solid transparent;
            border-bottom: 6px solid #111;
        }
        
        .bilgi-kutusu::after {
            content: '';
            position: absolute;
            top: -7px;
            left: 50%;
            transform: translateX(-50%);
            border-left: 7px solid transparent;
            border-right: 7px solid transparent;
            border-bottom: 7px solid rgba(255,255,255,0.2);
            z-index: -1;
        }

        .bilgi-kutusu.goster {
            opacity: 1;
            transform: translate(-50%, 20px) scale(1);
            pointer-events: auto;
        }

        .ok-ikonu {
            width: 14px;
            height: 14px;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .alt-bilgi {
            position: fixed;
            bottom: 2.5rem;
            left: 50%;
            transform: translateX(-50%) translateY(30px);
            font-size: 0.7rem;
            color: #777;
            letter-spacing: 0.2em;
            font-weight: 600;
            opacity: 0;
            transition: all 1s ease 1s;
            text-align: center;
            width: 100%;
        }

        body.yuklendi .alt-bilgi {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }