body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    overflow: hidden;
}

html {
    scroll-behavior: smooth;
}

/* --- オープニング演出用のスタイル --- */
#splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 1.5s ease-out, visibility 1.5s ease-out;
    visibility: visible;
    opacity: 1;
}

#splash-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.splash-image-container {
    position: relative;
    width: 90%;
    max-width: 500px;
    animation: pulse 2.5s infinite ease-in-out;
}

.splash-image {
    width: 100%;
    height: auto;
    opacity: 0;
    animation: fade-in 1s ease-out forwards;
}

.scan-light::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(255,255,255,0) 0%, rgba(255,255,255,0.1) 48%, rgba(167, 139, 250, 0.4) 50%, rgba(255,255,255,0.1) 52%, rgba(255,255,255,0) 100%);
    animation: scan 3s linear infinite 1s;
}

.glitch-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://startling-duckanoo-ddee83.netlify.app/2110581.jpg');
    background-size: cover;
    opacity: 0;
}

.glitch-layer:nth-child(1) {
    animation: glitch1 2s infinite 1.5s;
}

.glitch-layer:nth-child(2) {
    animation: glitch2 2s infinite 1.5s;
}

@keyframes fade-in {
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        filter: drop-shadow(0 0 5px #8b5cf6);
    }

    50% {
        transform: scale(1.03);
        filter: drop-shadow(0 0 15px #8b5cf6);
    }

    100% {
        transform: scale(1);
        filter: drop-shadow(0 0 5px #8b5cf6);
    }
}

@keyframes scan {
    0% {
        top: -100%;
    }

    100% {
        top: 100%;
    }
}

@keyframes glitch1 {
    0%, 2%, 4%, 20%, 22%, 100% {
        opacity: 0;
        transform: none;
    }

    1% {
        opacity: 0.5;
        transform: translate(-2px, 2px);
    }

    3% {
        opacity: 0.5;
        transform: translate(2px, -2px);
    }

    21% {
        opacity: 0.5;
        transform: translate(-2px, -2px);
    }
}

@keyframes glitch2 {
    0%, 2%, 4%, 20%, 22%, 100% {
        opacity: 0;
        transform: none;
    }

    1.5% {
        opacity: 0.5;
        transform: translate(2px, 2px) skewX(-10deg);
    }

    3.5% {
        opacity: 0.5;
        transform: translate(-2px, -2px) skewX(10deg);
    }

    21.5% {
        opacity: 0.5;
        transform: translate(2px, -2px) skewX(-5deg);
    }
}

/* --- 背景とスクロールのスタイル --- */
#matrix-canvas {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
}

.scroll-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 証明書モーダルのスタイル --- */
#certificate-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 200;
    padding: 1rem;
    cursor: pointer;
}

#certificate-modal img {
    max-width: 95%;
    max-height: 95%;
    border-radius: 0.5rem;
    box-shadow: 0 0 40px rgba(167, 139, 250, 0.6);
    cursor: default;
}

.cert-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(17,24,39,0.6);
    border: 1px solid rgba(167,139,250,0.4);
    color: #a78bfa;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    user-select: none;
}

.cert-nav:hover {
    background: rgba(167,139,250,0.25);
}

#cert-prev {
    left: 1rem;
}

#cert-next {
    right: 1rem;
}