:root {
                --bg0: #0a0a0a;
                --bg1: #121212;
                --panel: rgba(255, 255, 255, 0.06);
                --panel2: rgba(255, 255, 255, 0.09);
                --text: rgba(255, 255, 255, 0.92);
                --muted: rgba(255, 255, 255, 0.66);
                --yellow: #ffd700;
                --yellow2: #ffeb3b;
                --danger: #ff5c7a;
                --ok: #6dffb4;
                --shadow: 0 18px 60px rgba(0, 0, 0, 0.55);
                --ring: 0 0 0 3px rgba(255, 215, 0, 0.14), 0 0 28px rgba(255, 215, 0, 0.12);
                --pulse: 0;
            }

            * {
                box-sizing: border-box;
            }

            html,
            body {
                height: 100%;
            }

            body {
                margin: 0;
                color: var(--text);
                background: radial-gradient(
                        1200px 900px at 15% 10%,
                        rgba(255, 235, 59, calc(0.06 + var(--pulse) * 0.08)),
                        rgba(0, 0, 0, 0) 55%
                    ),
                    radial-gradient(
                        900px 700px at 80% 25%,
                        rgba(255, 215, 0, calc(0.05 + var(--pulse) * 0.07)),
                        rgba(0, 0, 0, 0) 60%
                    ),
                    linear-gradient(180deg, var(--bg0), var(--bg1));
                font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji",
                    "Segoe UI Emoji";
                overflow-x: hidden;
            }

            .wrap {
                max-width: 1180px;
                margin: 0 auto;
                padding: 28px 18px 26px;
            }

            header {
                display: flex;
                align-items: flex-end;
                justify-content: space-between;
                gap: 12px;
                margin-bottom: 18px;
            }

            .title {
                margin: 0;
                font-size: 1.55rem;
                letter-spacing: 0.02em;
            }

            .subtitle {
                margin: 0;
                color: var(--muted);
                font-size: 0.95rem;
                max-width: 62ch;
            }

            .hint {
                color: rgba(255, 255, 255, 0.74);
                font-size: 0.88rem;
                text-align: right;
            }

            .hint kbd {
                display: inline-block;
                padding: 2px 8px;
                border-radius: 9px;
                background: rgba(0, 0, 0, 0.35);
                border: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35);
                margin-left: 6px;
                margin-right: 2px;
                font-size: 0.84rem;
                color: rgba(255, 255, 255, 0.85);
            }

            .grid {
                display: grid;
                grid-template-columns: 1.12fr 0.88fr;
                gap: 18px;
                align-items: stretch;
            }

            .panel {
                border-radius: 18px;
                background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
                border: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: var(--shadow);
                overflow: hidden;
                backdrop-filter: blur(14px);
            }

            .panel-body {
                padding: 16px 16px 18px;
            }

            .topbar {
                display: grid;
                grid-template-columns: 1fr auto;
                gap: 12px;
                align-items: center;
            }

            .file-pill {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 14px;
                padding: 12px 12px;
                border-radius: 16px;
                background: rgba(0, 0, 0, 0.35);
                border: 1px solid rgba(255, 255, 255, 0.08);
            }

            .file-left {
                display: grid;
                gap: 4px;
                min-width: 0;
            }

            .file-label {
                color: rgba(255, 255, 255, 0.66);
                font-size: 0.78rem;
            }

            .file-name {
                font-weight: 650;
                letter-spacing: 0.01em;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
                max-width: 54ch;
            }

            .file-meta {
                color: rgba(255, 255, 255, 0.62);
                font-size: 0.82rem;
            }

            .file-input {
                display: flex;
                gap: 10px;
                align-items: center;
            }

            #file {
                position: absolute;
                width: 1px;
                height: 1px;
                opacity: 0;
                pointer-events: none;
            }

            .btn {
                appearance: none;
                border: 1px solid rgba(255, 255, 255, 0.1);
                background: rgba(255, 255, 255, 0.06);
                color: rgba(255, 255, 255, 0.92);
                border-radius: 14px;
                padding: 10px 12px;
                cursor: pointer;
                transition: transform 120ms ease, box-shadow 180ms ease, border-color 180ms ease, background 180ms ease;
                box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
                user-select: none;
                -webkit-tap-highlight-color: transparent;
            }

            .btn:hover {
                transform: translateY(-1px);
                border-color: rgba(255, 255, 255, 0.18);
                box-shadow: 0 12px 34px rgba(0, 0, 0, 0.42);
            }

            .btn:active {
                transform: translateY(0px);
            }

            .btn:focus-visible {
                outline: none;
                box-shadow: var(--ring), 0 12px 34px rgba(0, 0, 0, 0.42);
            }

            .btn[disabled] {
                opacity: 0.55;
                cursor: not-allowed;
                transform: none;
            }

            .btn-accent {
                border-color: rgba(255, 235, 59, 0.22);
                background: linear-gradient(180deg, rgba(255, 235, 59, 0.16), rgba(255, 215, 0, 0.08));
            }

            .play {
                width: 66px;
                height: 66px;
                border-radius: 18px;
                display: grid;
                place-items: center;
                background: radial-gradient(
                        60px 60px at 50% 35%,
                        rgba(255, 235, 59, calc(0.18 + var(--pulse) * 0.2)),
                        rgba(0, 0, 0, 0) 70%
                    ),
                    rgba(0, 0, 0, 0.35);
                border: 1px solid rgba(255, 255, 255, 0.1);
                box-shadow: 0 14px 44px rgba(0, 0, 0, 0.55);
                position: relative;
            }

            .play::after {
                content: "";
                position: absolute;
                inset: -4px;
                border-radius: 22px;
                background: radial-gradient(closest-side, rgba(255, 235, 59, calc(0.18 + var(--pulse) * 0.22)), rgba(0, 0, 0, 0));
                opacity: 0;
                transition: opacity 180ms ease;
                pointer-events: none;
            }

            .play.is-on::after {
                opacity: 1;
                animation: pulseRing 1.6s ease-in-out infinite;
            }

            @keyframes pulseRing {
                0% {
                    transform: scale(0.98);
                    filter: blur(0px);
                    opacity: 0.55;
                }
                50% {
                    transform: scale(1.03);
                    filter: blur(0.6px);
                    opacity: 0.9;
                }
                100% {
                    transform: scale(0.98);
                    filter: blur(0px);
                    opacity: 0.55;
                }
            }

            .play svg {
                width: 26px;
                height: 26px;
                fill: rgba(255, 255, 255, 0.92);
                filter: drop-shadow(0 8px 22px rgba(0, 0, 0, 0.35));
            }

            .badge {
                display: inline-flex;
                align-items: center;
                gap: 8px;
                padding: 7px 10px;
                border-radius: 999px;
                border: 1px solid rgba(255, 255, 255, 0.1);
                background: rgba(0, 0, 0, 0.32);
                color: rgba(255, 255, 255, 0.82);
                font-size: 0.84rem;
            }

            .controls {
                margin-top: 14px;
                display: grid;
                gap: 14px;
            }

            .seek-top {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 10px;
                flex-wrap: wrap;
                margin-bottom: 10px;
            }

            .row,
            .volume {
                display: grid;
                grid-template-columns: auto 1fr auto;
                gap: 10px;
                align-items: center;
                padding: 10px 10px;
                border-radius: 14px;
                background: rgba(0, 0, 0, 0.28);
                border: 1px solid rgba(255, 255, 255, 0.08);
            }

            .label {
                color: rgba(255, 255, 255, 0.7);
                font-size: 0.92rem;
                white-space: nowrap;
            }

            .time {
                color: rgba(255, 255, 255, 0.78);
                font-variant-numeric: tabular-nums;
                font-size: 0.92rem;
                white-space: nowrap;
            }

            .range {
                width: 100%;
                accent-color: var(--yellow2);
            }

            .toolbar {
                padding: 10px 10px;
                border-radius: 14px;
                background: rgba(0, 0, 0, 0.28);
                border: 1px solid rgba(255, 255, 255, 0.08);
                display: grid;
                gap: 10px;
            }

            .toolbar-row {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 10px;
                flex-wrap: wrap;
            }

            .select {
                min-width: 220px;
                padding: 9px 12px;
                border-radius: 12px;
                border: 1px solid rgba(255, 255, 255, 0.12);
                background: rgba(0, 0, 0, 0.35);
                color: rgba(255, 255, 255, 0.9);
                outline: none;
                box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
            }

            .select:focus-visible {
                box-shadow: var(--ring), 0 10px 24px rgba(0, 0, 0, 0.35);
            }

            .toggles {
                display: flex;
                flex-wrap: wrap;
                gap: 10px;
            }

            .toggle {
                padding: 9px 12px;
                border-radius: 12px;
                border: 1px solid rgba(255, 255, 255, 0.12);
                background: rgba(0, 0, 0, 0.32);
                color: rgba(255, 255, 255, 0.86);
                cursor: pointer;
                transition: transform 120ms ease, box-shadow 180ms ease, border-color 180ms ease;
                box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
            }

            .toggle:hover {
                transform: translateY(-1px);
                border-color: rgba(255, 255, 255, 0.2);
            }

            .toggle.on {
                border-color: rgba(255, 235, 59, 0.32);
                box-shadow: var(--ring), 0 10px 24px rgba(0, 0, 0, 0.35);
                background: linear-gradient(180deg, rgba(255, 235, 59, 0.16), rgba(255, 215, 0, 0.08));
                color: rgba(255, 255, 255, 0.92);
            }

            .message {
                margin-top: 10px;
                padding: 10px 12px;
                border-radius: 14px;
                border: 1px solid rgba(255, 255, 255, 0.08);
                background: rgba(0, 0, 0, 0.25);
                color: rgba(255, 255, 255, 0.78);
                min-height: 42px;
                display: flex;
                align-items: center;
            }

            .message.ok {
                border-color: rgba(109, 255, 180, 0.22);
                color: rgba(109, 255, 180, 0.92);
            }

            .message.err {
                border-color: rgba(255, 92, 122, 0.22);
                color: rgba(255, 140, 160, 0.96);
            }

            .playlist {
                margin-top: 12px;
                padding: 12px;
                border-radius: 14px;
                border: 1px solid rgba(255, 255, 255, 0.08);
                background: rgba(0, 0, 0, 0.22);
            }

            .playlist-head {
                display: flex;
                align-items: baseline;
                justify-content: space-between;
                gap: 10px;
                margin-bottom: 10px;
            }

            .playlist-title {
                font-weight: 650;
                letter-spacing: 0.01em;
            }

            .playlist-meta {
                color: rgba(255, 255, 255, 0.66);
                font-size: 0.86rem;
                white-space: nowrap;
            }

            .playlist-list {
                display: grid;
                gap: 8px;
                max-height: 160px;
                overflow: auto;
                padding-right: 6px;
            }

            .track {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 10px;
                padding: 9px 10px;
                border-radius: 12px;
                border: 1px solid rgba(255, 255, 255, 0.08);
                background: rgba(0, 0, 0, 0.28);
                cursor: pointer;
                user-select: none;
            }

            .track:hover {
                border-color: rgba(255, 255, 255, 0.16);
            }

            .track.on {
                border-color: rgba(255, 235, 59, 0.28);
                box-shadow: var(--ring);
            }

            .track-name {
                min-width: 0;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
            }

            .track-sub {
                color: rgba(255, 255, 255, 0.62);
                font-size: 0.84rem;
                font-variant-numeric: tabular-nums;
                white-space: nowrap;
            }

            body.drop-active .panel {
                box-shadow: var(--shadow), var(--ring);
            }

            .eq {
                --eq-h: 196px;
                display: grid;
                grid-template-columns: repeat(10, minmax(44px, 1fr));
                gap: 10px;
                padding: 12px 18px 10px;
                justify-content: center;
                border-radius: 14px;
                background: rgba(0, 0, 0, 0.28);
                border: 1px solid rgba(255, 255, 255, 0.08);
            }

            .band {
                display: grid;
                gap: 8px;
                justify-items: center;
            }

            .band {
                align-items: center;
            }

            .slider-wrap {
                height: var(--eq-h);
                display: grid;
                place-items: center;
                overflow: hidden;
                box-sizing: border-box;
                width: 100%;
                padding-top: 6px;
            }

            .db {
                font-variant-numeric: tabular-nums;
                font-size: 0.82rem;
                color: rgba(255, 255, 255, 0.78);
            }

            .hz {
                font-size: 0.8rem;
                color: rgba(255, 255, 255, 0.6);
            }

            .eq-range {
                width: 18px;
                height: var(--eq-h);
                transform: rotate(-90deg);
                transform-origin: center center;
                display: block;
                touch-action: pan-y;
                -webkit-tap-highlight-color: transparent;
                appearance: none;
                background: transparent;
                cursor: pointer;
                margin: 0;
            }

            .eq-range::-webkit-slider-runnable-track {
                height: 10px;
                border-radius: 999px;
                background: linear-gradient(90deg, rgba(255, 215, 0, 0.25), rgba(255, 235, 59, 0.95), rgba(255, 215, 0, 0.25));
                box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
            }

            .eq-range::-webkit-slider-thumb {
                -webkit-appearance: none;
                appearance: none;
                width: 18px;
                height: 18px;
                margin-top: -4px;
                border-radius: 999px;
                background: var(--yellow2);
                border: 2px solid rgba(0, 0, 0, 0.35);
                box-shadow: 0 0 0 7px rgba(255, 235, 59, 0.12), 0 10px 24px rgba(0, 0, 0, 0.45);
            }

            .eq-range::-moz-range-track {
                height: 10px;
                border-radius: 999px;
                background: linear-gradient(90deg, rgba(255, 215, 0, 0.25), rgba(255, 235, 59, 0.95), rgba(255, 215, 0, 0.25));
                box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
            }

            .eq-range::-moz-range-thumb {
                width: 18px;
                height: 18px;
                border-radius: 999px;
                background: var(--yellow2);
                border: 2px solid rgba(0, 0, 0, 0.35);
                box-shadow: 0 0 0 7px rgba(255, 235, 59, 0.12), 0 10px 24px rgba(0, 0, 0, 0.45);
            }

            .eq-actions {
                display: flex;
                gap: 10px;
                flex-wrap: wrap;
                justify-content: flex-start;
            }

            .small {
                padding: 9px 12px;
                font-size: 0.92rem;
                border-radius: 12px;
            }

            /* Visualizer */
            .viz {
                padding: 0;
            }

            .canvas-wrap {
                position: relative;
                height: 420px;
                border-radius: 18px;
                overflow: hidden;
            }

            .canvas-wrap::before {
                content: "";
                position: absolute;
                inset: 0;
                pointer-events: none;
                background:
                    radial-gradient(600px 420px at 50% 30%, rgba(255, 235, 59, 0.07), rgba(0, 0, 0, 0) 60%),
                    radial-gradient(900px 520px at 50% 100%, rgba(0, 0, 0, 0.65), rgba(0, 0, 0, 0) 65%);
                mix-blend-mode: screen;
                opacity: 0.85;
            }

            .canvas-wrap::after {
                content: "";
                position: absolute;
                inset: 0;
                pointer-events: none;
                background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(0, 0, 0, 0));
                opacity: 0.35;
            }

            canvas {
                width: 100%;
                height: 100%;
                display: block;
                border-radius: 18px;
            }

            .osc {
                height: 96px;
                opacity: 0.95;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
                display: none;
            }

            .osc.on {
                display: block;
            }

            .legend {
                position: absolute;
                left: 14px;
                top: 14px;
                display: flex;
                gap: 10px;
                align-items: center;
                pointer-events: none;
            }

            .dot {
                width: 10px;
                height: 10px;
                border-radius: 999px;
                background: var(--yellow2);
                box-shadow: 0 0 18px rgba(255, 235, 59, 0.42);
            }

            .legend span {
                font-size: 0.86rem;
                color: rgba(255, 255, 255, 0.78);
                letter-spacing: 0.02em;
            }

            /* Responsive */
            @media (max-width: 980px) {
                header {
                    flex-direction: column;
                    align-items: flex-start;
                }
                .hint {
                    text-align: left;
                }
                .grid {
                    grid-template-columns: 1fr;
                }
                .canvas-wrap {
                    height: 360px;
                }
            }

            @media (max-width: 560px) {
                .topbar {
                /* Make controls easier to touch */
                .btn {
                    padding: 12px 14px;
                }
                .toggle {
                    padding: 12px 14px;
                    border-radius: 14px;
                }
                .play {
                    width: 72px;
                    height: 72px;
                }

                /* EQ: fewer columns but larger sliders for touch */
                .eq {
                    grid-template-columns: repeat(5, minmax(56px, 1fr));
                    --eq-h: 220px;
                }
                .slider-wrap {
                    height: var(--eq-h);
                }
                .eq-range {
                    width: var(--eq-h);
                }
                .eq-range::-webkit-slider-thumb {
                    width: 24px;
                    height: 24px;
                }
                .eq-range::-moz-range-thumb {
                    width: 24px;
                    height: 24px;
                }

                /* Hide playlist on small screens to save space */
                .playlist {
                    display: none;
                }

                /* Reduce visualizer height on mobile */
                .canvas-wrap {
                    height: 260px;
                }

                /* Very small devices: compact EQ */
                @media (max-width: 420px) {
                    .eq {
                        grid-template-columns: repeat(3, minmax(56px, 1fr));
                        --eq-h: 180px;
                    }
                    .slider-wrap { height: var(--eq-h); }
                }
                }

            /* Force desktop look even on small screens when user enables it */
            .force-desktop .playlist {
                display: block !important;
            }

            .force-desktop .eq {
                --eq-h: 196px !important;
                grid-template-columns: repeat(10, minmax(44px, 1fr)) !important;
                padding-left: 18px !important;
                padding-right: 18px !important;
            }

            .force-desktop .canvas-wrap {
                height: 420px !important;
            }
                .row .time,
                .volume .time {
                    grid-column: 1 / -1;
                    text-align: center;
                }
                .play {
                    width: 62px;
                    height: 62px;
                }
                .eq {
                    grid-template-columns: repeat(5, minmax(44px, 1fr));
                }
                .eq {
                    --eq-h: 162px;
                }
                .select {
                    min-width: 190px;
                }
            }