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

        :root {
            --win-bg: #c8b878;
            --win-bg-dark: #a89858;
            --win-titlebar: #000080;
            --win-titlebar-text: #ffffff;
            --win-border-light: #dfcf9f;
            --win-border-dark: #706838;
            --win-border-darkest: #3a3418;
            --win-text: #1a1a1a;
            --win-text-dim: #5a5a3a;
            --win-input-bg: #d8c888;
            --win-button-face: #c8b878;
            --win-highlight: #000080;
            --win-highlight-text: #ffffff;
            --desktop-bg: #1a1a12;
            --slider-track: #8a7a48;
            --slider-fill: #000080;
            --font-sys: 'IBM Plex Mono', 'MS Gothic', monospace;
            --font-title: 'VT323', monospace;
            --scanline-opacity: 0.04;
        }

        html,
        body {
            width: 100%;
            height: 100%;
            overflow: hidden;
            font-family: var(--font-sys);
            color: var(--win-text);
            background: var(--desktop-bg);
        }

        /* ─── Background GIF ─── */
        #bg-image {
            position: fixed;
            inset: 0;
            z-index: 0;
            background: url('../image/back.gif') center/cover no-repeat;
            background-size: cover;
            opacity: 0.15;
            transition: opacity 0.3s ease;
        }

        /* ─── Glitch Effect ─── */
        #bg-image.glitch-slice {
            animation: glitchSlice 0.15s steps(2) forwards;
        }

        #bg-image.glitch-shift {
            animation: glitchShift 0.12s ease-out forwards;
        }

        #bg-image.glitch-hue {
            animation: glitchHue 0.2s ease-out forwards;
        }

        @keyframes glitchSlice {
            0% {
                clip-path: inset(0);
                transform: translateX(0);
            }

            25% {
                clip-path: inset(30% 0 40% 0);
                transform: translateX(8px);
            }

            50% {
                clip-path: inset(60% 0 10% 0);
                transform: translateX(-5px);
            }

            75% {
                clip-path: inset(10% 0 70% 0);
                transform: translateX(3px);
            }

            100% {
                clip-path: inset(0);
                transform: translateX(0);
            }
        }

        @keyframes glitchShift {
            0% {
                transform: translate(0, 0);
            }

            30% {
                transform: translate(-3px, 1px);
            }

            60% {
                transform: translate(2px, -1px);
            }

            100% {
                transform: translate(0, 0);
            }
        }

        @keyframes glitchHue {
            0% {
                filter: hue-rotate(0deg) brightness(1);
            }

            40% {
                filter: hue-rotate(40deg) brightness(1.15);
            }

            70% {
                filter: hue-rotate(-20deg) brightness(0.9);
            }

            100% {
                filter: hue-rotate(0deg) brightness(1);
            }
        }

        /* ─── TV Static Noise ─── */
        #bg-noise {
            position: fixed;
            inset: 0;
            z-index: 1;
            opacity: 0.10;
            pointer-events: none;
        }

        /* ─── CRT Effects ─── */
        #bg-scanlines {
            position: fixed;
            inset: 0;
            z-index: 2;
            pointer-events: none;
            background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 0, 0, 0.15) 2px, rgba(0, 0, 0, 0.15) 4px);
            opacity: var(--scanline-opacity);
        }

        #bg-vignette {
            position: fixed;
            inset: 0;
            z-index: 3;
            pointer-events: none;
            background: radial-gradient(ellipse at center, transparent 50%, rgba(0, 0, 0, 0.6) 100%);
        }

        .app {
            position: relative;
            z-index: 10;
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding: 3vh 16px 16px;
            overflow-y: auto;
            -webkit-overflow-scrolling: touch;
        }

        /* ─── Win95 3D Border Helpers ─── */
        .win-outset {
            border: 2px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
        }

        .win-inset {
            border: 2px solid;
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        /* ─── Header ─── */
        .header {
            text-align: center;
            margin-bottom: 16px;
            animation: bootIn 0.6s ease-out;
            flex-shrink: 0;
        }

        .header h1 {
            font-family: var(--font-title);
            font-size: 3.2rem;
            font-weight: 400;
            letter-spacing: 0.25em;
            color: var(--win-bg);
            text-shadow: 0 0 20px rgba(200, 184, 120, 0.3), 2px 2px 0 rgba(0, 0, 0, 0.5);
        }

        .header .subtitle {
            font-size: 0.72rem;
            color: var(--win-bg-dark);
            letter-spacing: 0.2em;
            margin-top: 4px;
            opacity: 0.7;
        }

        @keyframes bootIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ─── Window Panel ─── */
        .window {
            background: var(--win-bg);
            width: 100%;
            max-width: 440px;
            animation: bootIn 0.6s ease-out 0.2s both;
            flex-shrink: 0;
        }

        .window-titlebar {
            background: var(--win-titlebar);
            color: var(--win-titlebar-text);
            padding: 3px 4px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
            font-family: var(--font-sys);
            font-size: 0.72rem;
            font-weight: 500;
        }

        .window-titlebar-text {
            flex: 1;
            padding-left: 4px;
            letter-spacing: 0.05em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .window-controls {
            display: flex;
            gap: 2px;
        }

        .window-ctrl-btn {
            width: 16px;
            height: 14px;
            font-size: 0.6rem;
            background: var(--win-bg);
            border: 1px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: default;
            color: var(--win-text);
            line-height: 1;
            font-family: var(--font-sys);
            padding: 0;
        }

        .window-body {
            padding: 8px;
        }

        /* ─── Sound Channel ─── */
        .channel {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 6px;
            margin-bottom: 2px;
            background: var(--win-bg);
            text-align: left;
        }

        .channel-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--win-text-dim);
            opacity: 0.5;
            transition: opacity 0.3s;
        }

        .channel-icon svg {
            width: 16px;
            height: 16px;
        }

        .channel.active .channel-icon {
            opacity: 1;
            color: var(--win-text);
        }

        .channel-info {
            flex: 1;
            min-width: 0;
        }

        .channel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 3px;
        }

        .channel-name {
            font-size: 0.68rem;
            letter-spacing: 0.04em;
            font-family: var(--font-sys);
        }

        /* ─── Variant Buttons ─── */
        .variant-selector {
            display: flex;
            gap: 2px;
        }

        .variant-btn {
            width: 18px;
            height: 16px;
            font-size: 0.55rem;
            background: var(--win-button-face);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-sys);
            color: var(--win-text);
            border: 1px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            transition: all 0.15s;
        }

        .variant-btn:active {
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .variant-btn.active {
            background: var(--win-highlight);
            color: var(--win-highlight-text);
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .variant-btn.f-btn {
            width: auto;
            padding: 0 4px;
            font-size: 0.5rem;
            letter-spacing: 0.02em;
        }

        .variant-btn.f-active {
            background: var(--win-highlight);
            color: var(--win-highlight-text);
            animation: fBtnBlink 2.5s ease-in-out infinite;
        }

        @keyframes fBtnBlink {

            0%,
            100% {
                opacity: 0.7;
            }

            50% {
                opacity: 1;
            }
        }

        /* ─── Range Slider (Win95 style) ─── */
        input[type="range"] {
            -webkit-appearance: none;
            appearance: none;
            width: 100%;
            height: 6px;
            outline: none;
            cursor: pointer;
            background: var(--win-input-bg);
            border: 1px solid;
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
            touch-action: none;
        }

        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 10px;
            height: 18px;
            cursor: pointer;
            background: var(--win-button-face);
            border: 1px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
        }

        input[type="range"]::-moz-range-thumb {
            width: 10px;
            height: 18px;
            cursor: pointer;
            background: var(--win-button-face);
            border-radius: 0;
            border: 1px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
        }

        /* ─── Divider ─── */
        .divider {
            height: 2px;
            margin: 4px 6px;
            border-top: 1px solid var(--win-border-darkest);
            border-bottom: 1px solid var(--win-border-light);
        }

        /* ─── Master Volume ─── */
        .master-section {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 4px 6px;
            text-align: left;
        }

        .master-label {
            font-size: 0.65rem;
            color: var(--win-text-dim);
            white-space: nowrap;
            letter-spacing: 0.04em;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .master-label svg {
            width: 14px;
            height: 14px;
        }

        /* ─── Controls Row ─── */
        .controls-row {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 6px;
            margin-top: 8px;
            padding: 0 6px;
        }

        /* ─── Buttons (Win95 style) ─── */
        .win-btn {
            background: var(--win-button-face);
            cursor: pointer;
            font-family: var(--font-sys);
            font-size: 0.65rem;
            color: var(--win-text);
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            transition: all 0.1s;
        }

        .win-btn:active {
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
            padding-top: 1px;
            padding-left: 1px;
        }

        .win-btn svg {
            width: 14px;
            height: 14px;
        }

        .play-btn {
            width: 52px;
            height: 36px;
            gap: 4px;
            font-size: 0.6rem;
            letter-spacing: 0.04em;
        }

        .play-btn svg {
            width: 16px;
            height: 16px;
        }

        .play-btn .spin {
            animation: iconSpin 1s linear infinite;
        }

        @keyframes iconSpin {
            from {
                transform: rotate(0deg);
            }

            to {
                transform: rotate(360deg);
            }
        }

        .play-btn.playing {
            background: var(--win-highlight);
            color: var(--win-highlight-text);
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .preset-btn {
            width: 32px;
            height: 28px;
        }

        /* ─── Status Bar ─── */
        .statusbar {
            display: flex;
            font-size: 0.58rem;
            color: var(--win-text-dim);
            padding: 2px;
            gap: 2px;
            margin-top: 0;
        }

        .statusbar-cell {
            flex: 1;
            padding: 1px 6px;
            border: 1px solid;
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ─── About Link ─── */
        .about-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 12px;
            padding: 4px 12px;
            background: var(--win-button-face);
            color: var(--win-text-dim);
            text-decoration: none;
            font-size: 0.62rem;
            font-family: var(--font-sys);
            letter-spacing: 0.04em;
            border: 2px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            animation: bootIn 0.6s ease-out 0.4s both;
            transition: all 0.15s;
        }

        .about-link:active {
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .about-link svg {
            width: 12px;
            height: 12px;
        }

        /* ─── Preset Modal ─── */
        .modal-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 200;
            background: rgba(0, 0, 0, 0.5);
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .modal-overlay.show {
            display: flex;
        }

        .modal {
            background: var(--win-bg);
            width: 100%;
            max-width: 340px;
            border: 2px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
        }

        .modal-titlebar {
            background: var(--win-titlebar);
            color: var(--win-titlebar-text);
            padding: 3px 4px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.68rem;
            font-family: var(--font-sys);
        }

        .modal-body {
            padding: 12px;
            max-height: 60vh;
            overflow-y: auto;
        }

        .modal h3 {
            display: none;
        }

        .preset-list {
            list-style: none;
        }

        .preset-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 4px 6px;
            cursor: pointer;
            transition: background 0.15s;
            font-size: 0.7rem;
            margin-bottom: 1px;
        }

        .preset-item:hover {
            background: var(--win-highlight);
            color: var(--win-highlight-text);
        }

        .preset-item-name {
            font-size: 0.7rem;
            flex: 1;
        }

        .preset-delete {
            background: none;
            border: none;
            color: #884444;
            cursor: pointer;
            padding: 2px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .preset-delete:hover {
            color: #cc2222;
        }

        .preset-delete svg {
            width: 12px;
            height: 12px;
        }

        .preset-empty {
            text-align: center;
            font-size: 0.68rem;
            color: var(--win-text-dim);
            padding: 16px 0;
        }

        .modal-close {
            width: 100%;
            padding: 5px;
            margin-top: 8px;
            background: var(--win-button-face);
            cursor: pointer;
            font-family: var(--font-sys);
            font-size: 0.68rem;
            color: var(--win-text);
            border: 2px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
        }

        .modal-close:active {
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        /* ─── Footer ─── */
        .footer {
            text-align: center;
            padding: 20px 14px 12px;
            font-size: 0.55rem;
            color: var(--win-bg-dark);
            opacity: 0.5;
        }

        .footer a {
            color: var(--win-bg-dark);
            text-decoration: none;
        }

        .footer a:hover {
            text-decoration: underline;
        }

        .footer-links {
            display: flex;
            gap: 8px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 2px;
        }

        /* ─── Loading (BIOS style) ─── */
        .loading-overlay {
            position: fixed;
            inset: 0;
            z-index: 100;
            background: #0a0a06;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: flex-start;
            padding: 40px;
            transition: opacity 0.5s ease;
            font-family: var(--font-title);
            color: #a0a060;
        }

        .loading-overlay.hidden {
            opacity: 0;
            pointer-events: none;
        }

        .bios-line {
            font-size: 1.1rem;
            letter-spacing: 0.08em;
            margin-bottom: 4px;
            opacity: 0;
            animation: biosType 0.3s forwards;
        }

        .bios-line:nth-child(1) {
            animation-delay: 0.1s;
        }

        .bios-line:nth-child(2) {
            animation-delay: 0.3s;
        }

        .bios-line:nth-child(3) {
            animation-delay: 0.5s;
        }

        .bios-line:nth-child(4) {
            animation-delay: 0.7s;
        }

        .bios-cursor {
            display: inline-block;
            width: 0.6em;
            height: 1em;
            background: #a0a060;
            animation: blink 0.6s infinite;
            vertical-align: middle;
            margin-left: 2px;
        }

        @keyframes biosType {
            to {
                opacity: 1;
            }
        }

        @keyframes blink {

            0%,
            49% {
                opacity: 1;
            }

            50%,
            100% {
                opacity: 0;
            }
        }

        /* ─── Spatial Audio Section ─── */
        .spatial-section {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 4px 6px;
            margin-top: 2px;
            text-align: left;
        }

        .spatial-buttons {
            display: flex;
            gap: 2px;
            flex: 1;
            justify-content: flex-end;
        }

        .spatial-btn {
            padding: 2px 6px;
            font-size: 0.58rem;
            background: var(--win-button-face);
            cursor: pointer;
            font-family: var(--font-sys);
            color: var(--win-text-dim);
            border: 1px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            transition: all 0.15s;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .spatial-btn:active {
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .spatial-btn.active {
            background: var(--win-highlight);
            color: var(--win-highlight-text);
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .lying-btn {
            padding: 2px 5px;
            font-size: 0.58rem;
            background: var(--win-button-face);
            cursor: pointer;
            font-family: var(--font-sys);
            color: var(--win-text-dim);
            border: 1px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            transition: all 0.15s;
            white-space: nowrap;
            margin-left: 2px;
            display: flex;
            align-items: center;
            gap: 2px;
        }

        .lying-btn:active {
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .lying-btn.active {
            background: var(--win-highlight);
            color: var(--win-highlight-text);
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .lying-btn svg {
            width: 12px;
            height: 12px;
        }

        /* ─── Consent Modal ─── */
        .consent-overlay {
            position: fixed;
            inset: 0;
            z-index: 10000;
            background: rgba(0, 0, 0, 0.75);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            opacity: 0;
            transition: opacity 0.4s;
        }

        .consent-overlay.show {
            opacity: 1;
        }

        .consent-dialog {
            background: var(--win-bg);
            max-width: 380px;
            width: 100%;
            border: 2px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.4);
        }

        .consent-titlebar {
            background: var(--win-titlebar);
            color: var(--win-titlebar-text);
            padding: 3px 6px;
            font-size: 0.72rem;
            font-weight: 500;
            letter-spacing: 0.05em;
            user-select: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .consent-body {
            padding: 18px 20px;
            text-align: left;
        }

        .consent-icon {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .consent-icon svg {
            width: 28px;
            height: 28px;
            color: var(--win-highlight);
            flex-shrink: 0;
        }

        .consent-icon span {
            font-family: var(--font-sys);
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--win-text);
        }

        .consent-text {
            font-family: var(--font-sys);
            font-size: 0.72rem;
            color: var(--win-text-dim);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .consent-text p {
            margin-bottom: 8px;
        }

        .consent-actions {
            display: flex;
            justify-content: center;
            gap: 8px;
        }

        .consent-ok {
            padding: 4px 28px;
            font-size: 0.72rem;
            font-family: var(--font-sys);
            cursor: pointer;
            background: var(--win-button-face);
            color: var(--win-text);
            border: 2px solid;
            border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
            letter-spacing: 0.04em;
        }

        .consent-ok:active {
            border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
        }

        .consent-ok:focus {
            outline: 1px dotted var(--win-text);
            outline-offset: -4px;
        }

        /* ─── Mobile ─── */
        @media (max-width: 480px) {
            .app {
                padding: 2vh 10px 16px;
            }

            .header h1 {
                font-size: 2.2rem;
                letter-spacing: 0.15em;
            }

            .header .subtitle {
                font-size: 0.62rem;
            }

            .header {
                margin-bottom: 10px;
            }

            .window-body {
                padding: 6px;
            }

            .channel {
                gap: 6px;
                padding: 4px;
            }

            .channel-icon {
                width: 20px;
                height: 20px;
            }

            .channel-icon svg {
                width: 14px;
                height: 14px;
            }

            .play-btn {
                width: 46px;
                height: 32px;
            }

            .preset-btn {
                width: 28px;
                height: 24px;
            }

            .controls-row {
                gap: 4px;
                margin-top: 6px;
            }
        }

        @media (max-height: 680px) {
            .app {
                padding: 1vh 10px 10px;
            }

            .header {
                margin-bottom: 8px;
            }

            .header h1 {
                font-size: 1.8rem;
            }

            .channel {
                padding: 3px 4px;
            }

            .divider {
                margin: 2px 6px;
            }

            .controls-row {
                margin-top: 4px;
            }
        }

/* ─── Lying Button Disabled ─── */
.lying-btn.disabled {
    opacity: 0.3;
    pointer-events: none;
    cursor: default;
}

/* ─── Sync Section ─── */
.sync-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    margin-top: 2px;
    padding: 2px 6px 4px;
}

.sync-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 12px;
    height: 24px;
    font-size: 0.58rem;
    font-family: var(--font-sys);
    letter-spacing: 0.04em;
    white-space: nowrap;
    cursor: pointer;
    background: var(--win-button-face);
    color: var(--win-text-dim);
    border: 1px solid;
    border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
    transition: all 0.15s;
}

.sync-btn:active {
    border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
}

.sync-btn svg {
    width: 12px;
    height: 12px;
}

.sync-btn.syncing {
    pointer-events: none;
    opacity: 0.5;
}

/* ─── Sync Connection Overlay ─── */
.sync-overlay {
    position: fixed;
    inset: 0;
    z-index: 900;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(10, 10, 6, 0);
    pointer-events: none;
    transition: background 0.8s ease;
}

.sync-overlay.active {
    background: rgba(10, 10, 6, 0.88);
    pointer-events: auto;
}

.sync-overlay-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.sync-overlay.active .sync-overlay-content {
    opacity: 1;
    transform: scale(1);
}

.sync-wave {
    width: 80px;
    height: 80px;
    position: relative;
}

.sync-wave-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1.5px solid var(--win-bg, #c8b878);
    opacity: 0;
    animation: syncRingExpand 2s ease-out infinite;
}

.sync-wave-ring:nth-child(2) { animation-delay: 0.5s; }
.sync-wave-ring:nth-child(3) { animation-delay: 1.0s; }
.sync-wave-ring:nth-child(4) { animation-delay: 1.5s; }

@keyframes syncRingExpand {
    0% { transform: scale(0.3); opacity: 0.7; }
    100% { transform: scale(1.8); opacity: 0; }
}

.sync-wave-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 10px;
    height: 10px;
    margin: -5px 0 0 -5px;
    background: var(--win-bg, #c8b878);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(200, 184, 120, 0.4);
    animation: syncDotPulse 1.5s ease-in-out infinite;
}

@keyframes syncDotPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 12px rgba(200, 184, 120, 0.3); }
    50% { transform: scale(1.3); box-shadow: 0 0 28px rgba(200, 184, 120, 0.5); }
}

.sync-message {
    font-family: var(--font-sys, 'IBM Plex Mono', monospace);
    font-size: 0.75rem;
    color: rgba(200, 184, 120, 0.6);
    letter-spacing: 0.08em;
    text-align: center;
    line-height: 1.8;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.sync-message.visible {
    opacity: 1;
}

.sync-message .accent {
    color: var(--win-bg, #c8b878);
}

.sync-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.sync-particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--win-bg, #c8b878);
    border-radius: 50%;
    opacity: 0;
    animation: syncParticleFloat 3s ease-in-out infinite;
}

@keyframes syncParticleFloat {
    0% { opacity: 0; transform: translateY(0) scale(0.5); }
    20% { opacity: 0.5; }
    80% { opacity: 0.2; }
    100% { opacity: 0; transform: translateY(-120px) scale(1.2); }
}

/* ─── Thanks Button ─── */
.thanks-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 14px;
    height: 24px;
    font-size: 0.58rem;
    font-family: var(--font-sys);
    letter-spacing: 0.04em;
    cursor: pointer;
    background: var(--win-button-face);
    color: var(--win-text-dim);
    border: 1px solid;
    border-color: var(--win-border-light) var(--win-border-darkest) var(--win-border-darkest) var(--win-border-light);
    transition: all 0.15s;
    opacity: 0;
    transform: translateY(6px);
    animation: thanksAppear 0.5s ease forwards;
}

@keyframes thanksAppear {
    to { opacity: 1; transform: translateY(0); }
}

.thanks-btn:active {
    border-color: var(--win-border-darkest) var(--win-border-light) var(--win-border-light) var(--win-border-darkest);
}

.thanks-btn.sent {
    pointer-events: none;
    animation: thanksDissolve 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes thanksDissolve {
    0% { opacity: 1; transform: translateY(0); filter: blur(0); }
    100% { opacity: 0; transform: translateY(-6px); filter: blur(4px); }
}

/* ─── Thanks Wrapper ─── */
.thanks-wrapper {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.thanks-wrapper.visible {
    max-height: 40px;
}

.thanks-wrapper.collapsing {
    max-height: 0;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Thanks Received Notice ─── */
.thanks-notice {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-family: var(--font-sys);
    font-size: 0.56rem;
    color: rgba(200, 184, 120, 0.5);
    letter-spacing: 0.04em;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.thanks-notice.visible {
    display: flex;
    opacity: 1;
}

.thanks-notice .heart-icon {
    font-size: 0.65rem;
    line-height: 1;
}

@keyframes noticeGlow {
    0% { color: rgba(200, 184, 120, 0.5); }
    30% { color: rgba(200, 184, 120, 1); }
    100% { color: rgba(200, 184, 120, 0.5); }
}

.thanks-notice.pulse {
    animation: noticeGlow 1.2s ease;
}

/* ─── Heart Particles ─── */
.heart-particles-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    pointer-events: none;
    z-index: 800;
    overflow: hidden;
}

.heart-particle {
    position: absolute;
    bottom: -20px;
    font-size: 16px;
    opacity: 0;
    animation: heartFloat var(--duration, 4s) ease-out forwards;
    animation-delay: var(--delay, 0s);
}

@keyframes heartFloat {
    0% { opacity: 0; transform: translateY(0) scale(0.5) rotate(0deg); }
    8% { opacity: 0.5; transform: translateY(-30px) scale(0.85) rotate(-3deg); }
    50% { opacity: 0.35; transform: translateY(calc(-50vh)) scale(0.7) rotate(5deg); }
    100% { opacity: 0; transform: translateY(calc(-100vh - 30px)) scale(0.35) rotate(10deg); }
}

/* ─── Toast ─── */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(20, 20, 10, 0.92);
    border: 1px solid var(--win-bg);
    padding: 6px 16px;
    color: var(--win-bg);
    font-family: var(--font-sys);
    font-size: 0.62rem;
    letter-spacing: 0.04em;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}