:root {
            color-scheme: light;
        }
        html {
            overflow-x: hidden;
            width: 100%;
            scrollbar-width: none;
            background: #008080;
        }
        html::-webkit-scrollbar {
            width: 0;
            height: 0;
        }
        /* --- index.html ベースCSS --- */
        @font-face {
            font-family: 'PixelMplus';
            src: url('https://kaichi-naito.github.io/website/fonts/PixelMplus10-Regular.ttf') format('truetype');
            font-display: swap; 
        }
        body {
            font-family: 'PixelMplus', sans-serif;
            color: black;
            text-align: center;
            margin: 0;
            padding: 20px 0 calc(50px + env(safe-area-inset-bottom)) 0;
            background-color: transparent;
            background-image: none;
            overflow-x: hidden;
            width: 100%;
            z-index: 1;
            position: relative;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background:
                linear-gradient(rgba(0,0,0,0.10), rgba(0,0,0,0.10)),
                url('https://kaichi-naito.github.io/website/images/windows-95-background.jpg')
                center center / cover no-repeat;
            z-index: -1;
            pointer-events: none;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        .window {
            background-color: #c0c0c0;
            border: 2px solid;
            border-color: #ffffff #808080 #808080 #ffffff;
            box-shadow: 1px 1px 0 0 #000000;
            padding: 2px;
            margin: 0; 
            max-width: 95vw;
            display: inline-block;
            text-align: left;
            position: absolute;
            animation: fadeIn 0.4s ease-in forwards; 
            transition: transform 0.2s;
        }
        .draggable-cursor { cursor: grab; }
        .title-bar {
            background: linear-gradient(90deg, #000080, #1084d0);
            padding: 3px 5px 3px 8px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: white;
            font-size: 14px;
            margin-bottom: 2px;
        }

        .title-bar-controls {
            display: flex;
            align-items: center;
            gap: 2px;
            margin-left: 8px;
            flex-shrink: 0;
        }
        .window-control-button {
            width: 16px;
            height: 14px;
            padding: 0;
            line-height: 11px;
            text-align: center;
            font-family: 'PixelMplus', sans-serif;
            font-size: 12px;
            color: #000;
            background-color: #c0c0c0;
            border: 1px solid;
            border-color: #ffffff #808080 #808080 #ffffff;
            box-sizing: border-box;
            cursor: pointer;
        }
        .window-control-button:active {
            border-color: #808080 #ffffff #ffffff #808080;
            padding-top: 1px;
            padding-left: 1px;
        }
        .minimize-button {
            padding-bottom: 4px;
            font-weight: bold;
        }
        .maximize-button {
            font-size: 10px;
            line-height: 10px;
        }

        .close-button {
            width: 16px;
            height: 14px;
            padding: 0;
            position: relative;
            overflow: hidden;

            background-color: #c0c0c0;
            background-image: none !important;

            border: 1px solid;
            border-color: #ffffff #808080 #808080 #ffffff;

            color: transparent !important;
            box-sizing: border-box;
            cursor: pointer;
            flex: 0 0 auto;
        }

        .close-button::before {
            content: "×";
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;

            color: #000;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 13px;
            font-weight: 700;
            line-height: 1;
            transform: translateY(-1px);
            pointer-events: none;
        }

        .close-button:active {
            border-color: #808080 #ffffff #ffffff #808080;
        }

        .close-button:active::before {
            transform: translate(1px, 0);
        }
        .window-contents {
            padding: 15px;
            border: 1px solid #808080;
            background-color: #c0c0c0;
        }
        .win95-btn {
            background-color: #c0c0c0; border: 2px solid;
            border-color: #ffffff #808080 #808080 #ffffff;
            padding: 6px 12px; color: black !important;
            text-decoration: none !important; display: inline-block;
            font-size: 16px; margin: 5px; cursor: pointer;
        }
        .win95-btn:active {
            border-color: #808080 #ffffff #ffffff #808080;
            padding: 7px 11px 5px 13px;
        }
        .nav { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 40px; }
        .desktop-icon {
            display: flex; flex-direction: column; align-items: center;
            text-decoration: none; color: white !important; width: 80px; cursor: pointer;
        }
        .desktop-icon[href="RhythmGame.html"] { display: none !important; }
        .desktop-icon img { width: 48px; height: 48px; object-fit: contain; image-rendering: pixelated; margin-bottom: 5px; }
        .desktop-icon span { font-size: 14px; text-align: center; padding: 2px 4px; border: 1px dotted transparent; text-shadow: 1px 1px 0 #000; }
        .desktop-icon:hover span, .desktop-icon:active span { background-color: #000080; color: white; border: 1px dotted #fff; }
        .header-title { color: white; text-shadow: 2px 2px #000; font-size: 2.5em; margin-bottom: 20px; }
        .profile-section { display: flex; align-items: center; gap: 30px; }
        .profile-img { width: 120px; height: auto; border: none; }
        .social-icons-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; text-align: center; }
        .social-item img { width: 40px; height: 40px; display: block; margin: 0 auto 5px; }
        iframe { border: 2px solid #808080; background: #000; display: block; }
        .footer { margin-top: 50px; color: white; font-size: 12px; position: absolute; bottom: 60px; width: 100%; text-shadow: 1px 1px 2px #000; }
        

        /* --- Visitor Counter --- */
        #win-counter {
            width: 300px;
        }
        #win-counter .window-contents {
            text-align: center;
            padding: 12px 16px 14px;
        }
        .visitor-counter-line {
            margin: 2px 0 8px;
            font-size: 15px;
        }
        .visitor-counter-display {
            display: inline-block;
            min-width: 170px;
            padding: 5px 9px 6px;
            background: #000;
            border: 2px solid;
            border-color: #808080 #ffffff #ffffff #808080;
            color: #00ff00;
            font-family: 'PixelMplus', monospace;
            font-size: 25px;
            font-weight: normal;
            letter-spacing: 3px;
            line-height: 1;
            text-align: center;
            box-sizing: border-box;
        }
        .visitor-counter-suffix {
            margin: 8px 0 0;
            font-size: 14px;
        }

        /* --- タスクバーデザイン --- */
        #win95-taskbar {
            position: fixed; bottom: 0; left: 0; right: 0; width: 100%; height: 32px;
            padding: 0 4px env(safe-area-inset-bottom) 4px;
            box-sizing: border-box;
            background-color: #c0c0c0; border-top: 2px solid #ffffff;
            box-shadow: 0 -1px 0 0 #000000; z-index: 50000; display: flex; align-items: center;
        }

        #taskbar-start-btn {
            background-color: #c0c0c0; border: 2px solid; border-color: #ffffff #808080 #808080 #ffffff;
            height: 24px; padding: 0 2px; display: flex; align-items: center; justify-content: center; cursor: pointer; box-sizing: border-box;
        }
        #taskbar-start-btn:active { border-color: #808080 #ffffff #ffffff #808080; padding: 1px 1px 0 3px; }
        #taskbar-start-btn img { image-rendering: pixelated; height: 18px; width: auto; }
        #taskbar-tasks { display: flex; gap: 4px; margin-left: 6px; overflow: hidden; height: 24px; flex: 1; min-width: 0; }
        .win95-taskbar-tab {
            background-color: #c0c0c0; border: 2px solid; border-color: #ffffff #808080 #808080 #ffffff;
            height: 24px; width: min(150px, 16vw); min-width: 82px; padding: 0 4px; font-size: 12px; color: black; white-space: nowrap;
            overflow: hidden; text-overflow: ellipsis; display: flex; align-items: center; box-sizing: border-box;
        }
        #taskbar-tray {
            margin-left: auto; border-top: 1px solid #808080; border-left: 1px solid #808080;
            border-right: 1px solid #ffffff; border-bottom: 1px solid #ffffff;
            background-color: #c0c0c0; height: 24px; display: flex; align-items: center; gap: 6px; padding: 0 8px; box-sizing: border-box;
        }
        #taskbar-tray img { width: 30px; height: 30px; image-rendering: pixelated; }
        #tray-clock { font-size: 14px; color: black; width: 46px; text-align: right; }


        .win95-taskbar-tab {
            cursor: pointer;
            font-family: 'PixelMplus', sans-serif;
        }
        .win95-taskbar-tab.active {
            border-color: #808080 #ffffff #ffffff #808080;
            background-color: #d4d4d4;
            font-weight: bold;
        }

        /* --- 最大化 --- */
        .window.maximized-window {
            position: fixed !important;
            left: 4px !important;
            top: 4px !important;
            width: calc(100vw - 8px) !important;
            max-width: none !important;
            height: calc(100vh - 42px) !important;
            transform: none !important;
            box-sizing: border-box;
        }
        .window.maximized-window .window-contents {
            height: calc(100% - 24px);
            overflow: auto;
            box-sizing: border-box;
        }

        /* --- Start menu --- */
        #start-menu {
            position: fixed;
            left: 4px;
            bottom: 33px;
            width: 220px;
            display: none;
            z-index: 60000;
            background-color: #c0c0c0;
            border: 2px solid;
            border-color: #ffffff #808080 #808080 #ffffff;
            box-shadow: 1px 1px 0 #000;
            text-align: left;
            padding: 2px;
            box-sizing: border-box;
        }
        #start-menu.open {
            display: flex;
        }
        .start-menu-rail {
            width: 28px;
            background: linear-gradient(#808080, #3f3f3f);
            color: #fff;
            display: flex;
            align-items: flex-end;
            justify-content: center;
            padding: 8px 0;
            box-sizing: border-box;
        }
        .start-menu-rail span {
            writing-mode: vertical-rl;
            transform: rotate(180deg);
            font-size: 14px;
            letter-spacing: 1px;
        }
        .start-menu-items {
            flex: 1;
            padding: 4px;
        }
        .start-menu-item {
            width: 100%;
            min-height: 42px;
            display: flex;
            align-items: center;
            gap: 10px;
            border: 0;
            background: transparent;
            color: #000;
            font-family: 'PixelMplus', sans-serif;
            font-size: 14px;
            text-align: left;
            padding: 5px 8px;
            cursor: pointer;
        }
        .start-menu-item:hover,
        .start-menu-item:focus {
            background: #000080;
            color: #fff;
            outline: none;
        }
        .start-menu-item img {
            width: 28px;
            height: 28px;
            image-rendering: pixelated;
            object-fit: contain;
        }
        #taskbar-start-btn.start-open {
            border-color: #808080 #ffffff #ffffff #808080;
            padding: 1px 1px 0 3px;
        }

        /* --- Cat warning --- */
        #win-cat-warning {
            width: 360px;
            max-width: 92vw;
            display: none;
        }
        #win-cat-warning .window-contents {
            padding: 16px;
        }
        .warning-content {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .warning-error-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: #d00000;
            color: #fff;
            border: 2px solid #fff;
            box-shadow: 0 0 0 1px #800000;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: sans-serif;
            font-size: 25px;
            font-weight: bold;
            flex-shrink: 0;
        }
        .warning-message {
            font-size: 14px;
            line-height: 1.5;
            margin: 0;
        }
        .warning-actions {
            text-align: center;
            margin-top: 14px;
        }
        .warning-ok-button {
            min-width: 80px;
            padding: 4px 14px;
            font-family: 'PixelMplus', sans-serif;
            font-size: 13px;
            background: #c0c0c0;
            border: 2px solid;
            border-color: #ffffff #808080 #808080 #ffffff;
            cursor: pointer;
        }
        .warning-ok-button:active {
            border-color: #808080 #ffffff #ffffff #808080;
        }

        /* --- Shut Down / blue screen --- */
        #shutdown-screen {
            position: fixed;
            inset: 0;
            display: none;
            z-index: 1000000;
            background: #0000aa;
            color: #fff;
            text-align: left;
            font-family: 'PixelMplus', monospace;
            padding: 6vh 7vw;
            box-sizing: border-box;
            overflow: hidden;
            cursor: none;
        }
        #shutdown-screen.active {
            display: block;
        }
        #shutdown-screen .shutdown-title {
            display: inline-block;
            background: #c0c0c0;
            color: #0000aa;
            padding: 2px 8px;
            margin-bottom: 20px;
            font-family: 'PixelMplus', sans-serif;
            font-size: 16px;
        }
        #shutdown-output {
            white-space: pre-wrap;
            font-family: 'PixelMplus', sans-serif;
            font-size: clamp(12px, 1.25vw, 17px);
            line-height: 1.35;
            margin: 0;
        }
/* --- Very subtle random CRT glitch noise --- */
        #crt-glitch-layer {
            position: fixed;
            inset: 0;
            z-index: 2147483645;
            pointer-events: none;
            overflow: hidden;
        }
        .crt-glitch-strip {
            position: absolute;
            left: -2%;
            width: 104%;
            height: 2px;
            opacity: 0;
            background:
                repeating-linear-gradient(
                    90deg,
                    rgba(255,255,255,0.08) 0px,
                    rgba(255,255,255,0.08) 1px,
                    rgba(0,0,0,0.05) 1px,
                    rgba(0,0,0,0.05) 3px,
                    transparent 3px,
                    transparent 8px
                );
            -webkit-backdrop-filter: contrast(1.08) brightness(1.055) saturate(1.03);
            backdrop-filter: contrast(1.08) brightness(1.055) saturate(1.03);
            will-change: top, height, transform, opacity;
        }
        .crt-glitch-strip.visible {
            opacity: 0.080;
        }




        /* --- CRT front layer: flat debug version --- */
        /*
           Debug build:
           - No page curvature
           - No curved scanline grid
           - Original v12 UI/layout behavior is preserved
        */
        #crt-overlay {
            position: fixed;
            inset: 0;
            z-index: 2147483646;
            pointer-events: none;
            overflow: hidden;
            background:
                repeating-linear-gradient(
                    to bottom,
                    rgba(0,0,0,0.00) 0px,
                    rgba(0,0,0,0.00) 2px,
                    rgba(0,0,0,0.050) 3px,
                    rgba(0,0,0,0.050) 4px
                );
            box-shadow:
                inset 0 0 38px rgba(255,255,255,0.035),
                inset 0 0 92px rgba(0,0,0,0.16);
            -webkit-backdrop-filter: contrast(1.022) saturate(0.97);
            backdrop-filter: contrast(1.022) saturate(0.97);
        }

        #crt-overlay::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 0% 0%,
                    rgba(0,0,0,0.36) 0%,
                    rgba(0,0,0,0.18) 8%,
                    rgba(0,0,0,0.06) 16%,
                    transparent 25%),
                radial-gradient(circle at 100% 0%,
                    rgba(0,0,0,0.36) 0%,
                    rgba(0,0,0,0.18) 8%,
                    rgba(0,0,0,0.06) 16%,
                    transparent 25%),
                radial-gradient(circle at 0% 100%,
                    rgba(0,0,0,0.36) 0%,
                    rgba(0,0,0,0.18) 8%,
                    rgba(0,0,0,0.06) 16%,
                    transparent 25%),
                radial-gradient(circle at 100% 100%,
                    rgba(0,0,0,0.36) 0%,
                    rgba(0,0,0,0.18) 8%,
                    rgba(0,0,0,0.06) 16%,
                    transparent 25%);
        }

        #crt-overlay::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(
                    ellipse at 25% 12%,
                    rgba(255,255,255,0.15) 0%,
                    rgba(255,255,255,0.065) 10%,
                    rgba(255,255,255,0.025) 22%,
                    transparent 40%
                ),
                linear-gradient(
                    115deg,
                    rgba(255,255,255,0.07) 0%,
                    rgba(255,255,255,0.03) 18%,
                    transparent 38%
                );
            mix-blend-mode: screen;
            opacity: 0.88;
        }

        @media (max-width: 800px) {
            body { font-size: 14px; background-attachment: scroll; }
            .header-title { font-size: 1.6em; margin-bottom: 15px; }
            .window { box-sizing: border-box; }
            
            #win-profile { width: 200px !important; }
            #win-counter { width: 250px !important; max-width: 88vw !important; }

            /* Visitor Counter: smartphone sizing */
            #win-counter .window-contents {
                padding: 9px 12px 10px;
            }
            .visitor-counter-line {
                margin: 1px 0 6px;
                font-size: 12px;
            }
            .visitor-counter-display {
                min-width: 145px;
                padding: 4px 7px 5px;
                font-size: 20px;
                letter-spacing: 2px;
            }
            .visitor-counter-suffix {
                margin-top: 6px;
                font-size: 12px;
            }

            #win-phalux { width: 45% !important; max-width: 160px !important; }
            #win-social { width: 90% !important; max-width: 350px !important; }
            #win-spotify { width: 92% !important; max-width: 360px !important; }
            #win-youtube { width: 96% !important; max-width: 380px !important; }
            #win-nyan-special { width: 90% !important; max-width: 360px !important; }
            
            #win-phalux .window-contents { padding: 5px !important; }
            #win-phalux .window-contents img { max-width: 100px !important; }

            .title-bar { font-size: 12px; padding: 2px 4px 2px 6px; }
            .close-button { width: 14px; height: 12px; font-size: 11px; }
            .window-control-button { width: 14px; height: 12px; font-size: 10px; line-height: 9px; }
            .title-bar-controls { gap: 1px; margin-left: 4px; }
            #win-cat-warning { width: 90% !important; max-width: 340px !important; }
            .window-contents { padding: 8px; }
            
            /* --- バグの原因だった「消えていた箇所」を復元 --- */
            .profile-section { flex-direction: column; text-align: center; gap: 8px; }
            .profile-text h2 { font-size: 1.2em; margin: 0 0 4px 0 !important; }
            .profile-text p { font-size: 0.9em; margin: 0 0 8px 0 !important; }
            .profile-text a { font-size: 12px !important; }
            .profile-img { width: 84px !important; }
            
            .social-icons-grid { gap: 4px !important; }
            .social-item { padding: 3px 6px !important; font-size: 12px !important; }
            .social-item img { width: 28px !important; height: 28px !important; margin-bottom: 2px !important; }
            /* ----------------------------------------------- */

            .nav { gap: 8px; margin-bottom: 25px; }
            .desktop-icon { width: 60px; }
            .desktop-icon img { width: 34px !important; height: 34px !important; }
            .desktop-icon span { font-size: 11px; padding: 1px 2px; }

            /* スマホ用タスクバー */
            #win95-taskbar { height: 28px; }
    
        /* Bottom overscan is handled separately:
           extend taskbar-colored pixels below and sideways beyond the visible screen. */
        #win95-taskbar::after {
            content: "";
            position: absolute;
            left: -20vw;
            right: -20vw;
            top: 100%;
            height: 120px;
            background: #c0c0c0;
            pointer-events: none;
        }

        #taskbar-start-btn { height: 22px; }
            #taskbar-start-btn img { height: 16px !important; }
            .win95-taskbar-tab { width: 90px; font-size: 10px; height: 22px; }
            #taskbar-tray img { width: 28px; height: 28px; }
            #tray-clock { font-size: 12px; width: 36px; }
        }

        /* =========================================================
           30 Nyan Cats: screen crash event
           PC:
             - 1.55 sec
             - clockwise 4 rotations
             - max scale 80

           Mobile:
             - same 1.55 sec timing/easing
             - clockwise 4 rotations
             - final width = 108vw (slightly wider than the screen)
             - original GIF aspect ratio is preserved
           ========================================================= */

        #nyan-cat-crash {
            position: fixed;
            left: 50%;
            top: 50%;
            width: 22px;
            height: auto !important;
            max-width: none !important;
            max-height: none !important;
            object-fit: contain;
            display: block;

            z-index: 999999;
            pointer-events: none;
            image-rendering: pixelated;

            transform: translate(-50%, -50%) rotate(0deg) scale(0.18);
            transform-origin: center center;

            opacity: 0.98;
            filter: brightness(1);
            will-change: transform, width, filter, opacity;
        }

        @keyframes nyan-cat-crash-desktop {
            from {
                transform: translate(-50%, -50%) rotate(0deg) scale(0.18);
            }
            to {
                transform: translate(-50%, -50%) rotate(1440deg) scale(80);
            }
        }

        /*
           Mobile uses width instead of a fixed scale value.
           108vw means the final cat is about 8% wider than the phone screen,
           regardless of the phone's actual width.
        */
        @keyframes nyan-cat-crash-mobile {
            from {
                width: 4px;
                transform: translate(-50%, -50%) rotate(0deg);
            }
            to {
                width: 108vw;
                transform: translate(-50%, -50%) rotate(1440deg);
            }
        }

        #nyan-cat-crash.nyan-cat-crash-go {
            animation:
                nyan-cat-crash-desktop
                1.55s
                cubic-bezier(0.20, 0.82, 0.16, 1)
                forwards;
        }

        #nyan-cat-crash.nyan-cat-crash-impact {
            filter: brightness(2.2) contrast(1.15);
            opacity: 1;
        }

        @media (max-width: 800px) {
            #nyan-cat-crash {
                width: 4px;
                height: auto !important;
                transform: translate(-50%, -50%) rotate(0deg);
            }

            #nyan-cat-crash.nyan-cat-crash-go {
                animation:
                    nyan-cat-crash-mobile
                    1.55s
                    cubic-bezier(0.20, 0.82, 0.16, 1)
                    forwards;
            }
        }