:root {
        color-scheme: dark;
        --bg: #1a1a1a;
        --panel: #242424;
        --panel2: #2e2e2e;
        --ink: #eee;
        --muted: #aaa;
        --accent: #62d6ff;
        --danger: #ff7878;
      }
      * {
        box-sizing: border-box;
        -webkit-tap-highlight-color: transparent;
      }
      html,
      body {
        margin: 0;
        height: 100%;
        background: var(--bg);
        color: var(--ink);
        font:
          15px/1.35 system-ui,
          -apple-system,
          Segoe UI,
          sans-serif;
        overflow: hidden;
      }
      button,
      input,
      textarea {
        font: inherit;
      }
      button {
        touch-action: manipulation;
        border: 0;
        color: var(--ink);
        background: #3b3b3b;
        border-radius: 8px;
        cursor: pointer;
        transition:
          filter 0.08s,
          transform 0.08s;
      }
      button:active {
        filter: brightness(1.45);
        transform: scale(0.96);
      }
      .screen {
        height: 100dvh;
      }
      .hidden {
        display: none !important;
      }
      /* Start */
      #startScreen {
        overflow: auto;
        padding: clamp(20px, 7vw, 48px);
        display: flex;
        flex-direction: column;
        gap: 16px;
        max-width: 700px;
        margin: auto;
      }
      h1 {
        margin: 0 0 8px;
        font-size: clamp(26px, 7vw, 38px);
      }
      .hint {
        color: var(--muted);
        margin: 0;
      }
      .field {
        display: grid;
        gap: 8px;
      }
      .upload {
        background: var(--panel);
        border: 1px solid #444;
        border-radius: 12px;
        padding: 14px;
      }
      .upload input {
        width: 100%;
        color: var(--muted);
      }
      textarea {
        width: 100%;
        min-height: 44vh;
        resize: vertical;
        background: #111;
        color: var(--ink);
        border: 1px solid #4b4b4b;
        border-radius: 10px;
        padding: 12px;
      }
      .primary {
        background: var(--accent);
        color: #09212b;
        font-weight: 800;
        padding: 14px;
        font-size: 17px;
      }
      .primary.danger {
        background: #b3261e;
        color: #fff;
      }
      .modal p {
        margin: 0;
        color: var(--muted);
      }
      .notice {
        color: #ffd477;
        min-height: 1.3em;
      }
      /* Sync */
      #syncScreen {
        display: grid;
        grid-template-rows: 30dvh 60dvh 10dvh;
        min-height: 100dvh;
        position: relative;
      }
      .wave-area {
        position: relative;
        min-height: 0;
        border-bottom: 1px solid #444;
        background: #151515;
        overflow: hidden;
      }
      .wave-toolbar {
        position: absolute;
        z-index: 3;
        left: 8px;
        top: 8px;
        right: 8px;
        display: flex;
        justify-content: space-between;
        pointer-events: none;
        font-size: 12px;
        color: #b9dce7;
        text-shadow: 0 1px 2px #000;
      }
      .wave-toolbar > * {
        background: #0008;
        padding: 3px 6px;
        border-radius: 5px;
      }
      #waveform {
        height: 100%;
        touch-action: pan-y;
      }
      .lyrics {
        overflow-y: auto;
        overscroll-behavior: contain;
        background: #1e1e1e;
        scroll-behavior: smooth;
      }
      .block {
        min-height: 98px;
        display: flex;
        gap: 7px;
        padding: 7px 8px;
        border-bottom: 1px solid #383838;
        will-change: transform;
        transform: translateZ(0);
        transition:
          background 0.12s,
          box-shadow 0.12s;
      }
      .block.active {
        background: #17313a;
        box-shadow: inset 4px 0 var(--accent);
      }
      .block.selected {
        background: #2b2542;
        box-shadow: inset 4px 0 #a78bfa;
      }
      .left {
        width: 83px;
        flex: none;
        display: grid;
        grid-template-rows: 1fr 1.25fr 1fr;
        gap: 4px;
      }
      .stamp-time {
        font-size: 12px;
        padding: 2px 3px;
        background: #2a2a2a;
        white-space: nowrap;
      }
      .nudge {
        font-size: 11px;
      }
      .line {
        min-width: 0;
        flex: 1;
        padding: 9px 3px;
        white-space: pre-wrap;
        overflow-wrap: anywhere;
        align-self: center;
        cursor: pointer;
        user-select: none;
        -webkit-user-select: none;
        -webkit-touch-callout: none;
      }
      .line.empty:before {
        content: "Blank line";
        color: #747474;
        font-style: italic;
      }
      .right {
        width: 80px;
        flex: none;
        display: grid;
        grid-template-rows: 22px 1fr 22px;
        gap: 4px;
      }
      .icon {
        padding: 0;
        font-size: 16px;
        background: #303030;
      }
      .stamp {
        min-height: 48px;
        background: #ffb648;
        color: #251600;
        font-weight: 900;
        font-size: 13px;
        letter-spacing: 0.5px;
      }
      .transport {
        position: relative;
        z-index: 5;
        border-top: 1px solid #4a4a4a;
        background: #252525;
        display: flex;
        align-items: center;
        gap: 4px;
        min-height: 56px;
        padding: 6px max(8px, env(safe-area-inset-right))
          max(6px, env(safe-area-inset-bottom))
          max(8px, env(safe-area-inset-left));
        min-width: 0;
      }
      .transport button {
        height: 32px;
        padding: 0 8px;
        font-size: 14px;
      }
      .play {
        background: var(--accent) !important;
        color: #09212b !important;
        font-weight: 900;
        font-size: 18px !important;
        min-width: 52px;
      }
      .speed {
        display: grid;
        gap: 1px;
        min-width: 70px;
        flex: 1;
        color: var(--muted);
        font-size: 11px;
        text-align: center;
      }
      .speed input {
        width: 100%;
        accent-color: var(--accent);
      }
      .export {
        font-size: 12px !important;
        padding: 0 8px !important;
        flex-shrink: 0;
      }
      /* dialogs */
      .sheet-backdrop,
      .modal-backdrop {
        position: fixed;
        z-index: 20;
        inset: 0;
        background: #0009;
        display: flex;
        align-items: flex-end;
      }
      .sheet {
        width: 100%;
        background: #303030;
        border-radius: 16px 16px 0 0;
        padding: 10px 14px calc(14px + env(safe-area-inset-bottom));
        display: grid;
        gap: 7px;
        max-height: 70dvh;
        overflow-y: auto;
      }
      .sheet .handle {
        height: 4px;
        width: 40px;
        background: #777;
        border-radius: 9px;
        margin: 2px auto 7px;
      }
      .sheet button {
        padding: 13px;
        text-align: left;
        background: #3d3d3d;
      }
      .sheet .delete {
        color: #ff9b9b;
      }
      .modal-backdrop {
        align-items: center;
        justify-content: center;
        padding: 20px;
      }
      .modal {
        background: #303030;
        width: min(420px, 100%);
        padding: 18px;
        border-radius: 14px;
        display: grid;
        gap: 12px;
      }
      .modal input {
        background: #161616;
        color: #eee;
        border: 1px solid #666;
        border-radius: 7px;
        padding: 11px;
        width: 100%;
      }
      .modal-actions {
        display: flex;
        justify-content: flex-end;
        gap: 8px;
      }
      .modal-actions button {
        padding: 9px 13px;
      }
      .flash {
        animation: flash 0.3s ease;
      }
      @keyframes flash {
        50% {
          background: #4c7b88;
        }
      }
      /* selection action bar */
      #selbar {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        z-index: 10;
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 6px;
        padding: 8px;
        background: #2a2a2a;
        border-bottom: 1px solid #4a4a4a;
      }
      #selbar .count {
        margin-right: auto;
        color: var(--muted);
        font-size: 13px;
        white-space: nowrap;
      }
      #selbar button {
        padding: 8px 10px;
        font-size: 13px;
      }
      #selbar button.danger {
        color: var(--danger);
      }
      /* toast */
      .toast {
        position: fixed;
        left: 50%;
        bottom: 72px;
        transform: translateX(-50%) translateY(6px);
        background: #3d3d3d;
        color: var(--ink);
        padding: 9px 14px;
        border-radius: 9px;
        font-size: 13px;
        opacity: 0;
        transition:
          opacity 0.25s,
          transform 0.25s;
        z-index: 40;
        pointer-events: none;
        max-width: 80vw;
        text-align: center;
      }
      .toast.show {
        opacity: 1;
        transform: translateX(-50%);
      }
      /* modals with forms */
      .modal label {
        display: grid;
        gap: 4px;
        font-size: 12px;
        color: var(--muted);
      }
      .modal textarea {
        min-height: 110px;
      }