/* Page-local light theme (does not modify shared resources) */
        :root {
            --nc-bg: #e8ecf1;
            --nc-surface: #ffffff;
            --nc-surface-elevated: #f4f6f9;
            --nc-border: rgba(0, 0, 0, 0.1);
            --nc-text: #1a2332;
            --nc-text-muted: #5a6b7d;
            --nc-accent: #009a46;
            --nc-accent-dim: rgba(0, 154, 70, 0.14);
            --nc-warn: #c77d00;
            --nc-danger: #c62828;
            --nc-mono: "JetBrains Mono", ui-monospace, monospace;
            --nc-radius: 12px;
            --nc-radius-sm: 8px;
            --nc-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
        }

        html {
            font-size: 16px;
        }

        .number-converter-page {
            font-family: "DM Sans", system-ui, sans-serif;
            background: var(--nc-bg);
            background-image:
                radial-gradient(ellipse 100% 70% at 50% 0%, rgba(0, 154, 70, 0.07), transparent),
                radial-gradient(ellipse 50% 50% at 100% 20%, rgba(48, 107, 151, 0.06), transparent);
            color: var(--nc-text);
            line-height: 1.5;
            min-height: 100%;
        }

        .nc-main {
            flex: 1;
            width: 100%;
            max-width: 56rem;
            margin: 0 auto;
            padding: 1.25rem 1rem 3rem;
        }

        .nc-app {
            background: var(--nc-surface);
            border: 1px solid var(--nc-border);
            border-radius: var(--nc-radius);
            box-shadow: var(--nc-shadow);
            overflow: hidden;
        }

        .nc-hero {
            padding: 2rem 1.75rem 1.75rem;
            text-align: center;
            background: linear-gradient(165deg, #f0faf4 0%, #ffffff 55%, #f7f9fc 100%);
            border-bottom: 1px solid var(--nc-border);
        }

        .nc-hero h2 {
            font-size: clamp(1.5rem, 4vw, 1.85rem);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin: 0 0 0.5rem;
        }

        .nc-hero p {
            margin: 0;
            color: var(--nc-text-muted);
            font-size: 0.95rem;
            max-width: 28rem;
            margin-left: auto;
            margin-right: auto;
        }

        .nc-badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--nc-accent);
            background: var(--nc-accent-dim);
            padding: 0.2rem 0.55rem;
            border-radius: 999px;
            margin-bottom: 0.75rem;
        }

        .nc-table-wrap {
            padding: 1rem 1rem 0.5rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        #MainTable.nc-grid {
            width: 100%;
            min-width: min(100%, 320px);
            border-collapse: separate;
            border-spacing: 0 6px;
            table-layout: fixed;
        }

        #MainTable.nc-grid th.nc-row-head {
            width: 7.5rem;
            min-width: 7rem;
            text-align: left;
            font-size: 0.72rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--nc-text-muted);
            padding: 0.5rem 0.75rem 0.5rem 0;
            vertical-align: middle;
            background: var(--nc-surface);
            position: sticky;
            left: 0;
            z-index: 1;
            box-shadow: 4px 0 8px -4px rgba(0, 0, 0, 0.06);
        }

        #MainTable.nc-grid td.nc-cell {
            padding: 0;
            vertical-align: middle;
            background: transparent;
        }

        #MainTable.nc-grid tr.data-row {
            background: transparent;
        }

        #MainTable.nc-grid input.nc-field {
            display: block;
            width: 100%;
            box-sizing: border-box;
            font-family: var(--nc-mono);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--nc-text);
            background: var(--nc-surface-elevated);
            border: 1px solid var(--nc-border);
            border-radius: var(--nc-radius-sm);
            padding: 0.45rem 0.55rem;
            margin: 0;
            transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
        }

        #MainTable.nc-grid input.nc-field:hover {
            border-color: rgba(0, 0, 0, 0.16);
        }

        #MainTable.nc-grid input.nc-field:focus {
            outline: none;
            border-color: var(--nc-accent);
            box-shadow: 0 0 0 3px var(--nc-accent-dim);
            background: #ffffff;
        }

        #MainTable.nc-grid input.nc-field::placeholder {
            color: var(--nc-text-muted);
            opacity: 0.6;
        }

        .nc-bit-grid {
            width: 100%;
            border-collapse: separate;
            border-spacing: 3px;
            table-layout: fixed;
        }

        .nc-bit {
            text-align: center;
            font-family: var(--nc-mono);
            font-size: clamp(0.55rem, 1.4vw, 0.72rem);
            font-weight: 600;
            padding: 0.28rem 0.15rem !important;
            border-radius: 4px;
            border: 1px solid var(--nc-border);
            user-select: none;
            line-height: 1.2;
            cursor: pointer;
            transition: transform 0.08s ease, box-shadow 0.12s ease, filter 0.12s ease;
        }

        .nc-bit:hover {
            filter: brightness(0.97);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
        }

        .nc-bit:focus {
            outline: none;
            box-shadow: 0 0 0 2px var(--nc-surface), 0 0 0 4px var(--nc-accent);
        }

        .nc-bit:active {
            transform: scale(0.96);
        }

        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        .nc-bit--0 {
            background: #eef1f5;
            color: var(--nc-text-muted);
        }

        .nc-bit--1 {
            background: rgba(0, 154, 70, 0.18);
            color: #006631;
            border-color: rgba(0, 154, 70, 0.35);
        }

        .nc-bit.nc-bit--byte-start {
            box-shadow: -3px 0 0 0 var(--nc-accent);
            margin-left: 4px;
        }

        .nc-toolbar {
            padding: 1.25rem 1rem 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            border-top: 1px solid var(--nc-border);
            background: var(--nc-surface-elevated);
        }

        .nc-toolbar--copy {
            padding-top: 1rem;
            padding-bottom: 1rem;
        }

        .nc-tool-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.65rem;
        }

        .nc-tool-label {
            font-size: 0.68rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.07em;
            color: var(--nc-text-muted);
            width: 100%;
            margin-bottom: -0.25rem;
        }

        .nc-tool-row .nc-tool-label {
            width: auto;
            margin-bottom: 0;
            margin-right: 0.25rem;
        }

        .nc-btn {
            font-family: inherit;
            font-size: 0.82rem;
            font-weight: 600;
            padding: 0.5rem 0.9rem;
            border-radius: var(--nc-radius-sm);
            border: 1px solid var(--nc-border);
            background: var(--nc-surface-elevated);
            color: var(--nc-text);
            cursor: pointer;
            transition: background 0.15s, border-color 0.15s, transform 0.1s;
        }

        .nc-btn:hover:not(:disabled) {
            background: #e8ecf0;
            border-color: rgba(0, 0, 0, 0.14);
        }

        .nc-btn:active:not(:disabled) {
            transform: scale(0.98);
        }

        .nc-btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px var(--nc-accent-dim);
            border-color: var(--nc-accent);
        }

        .nc-btn:disabled {
            opacity: 0.35;
            cursor: not-allowed;
        }

        .nc-btn--primary {
            background: var(--nc-accent-dim);
            border-color: rgba(0, 154, 70, 0.45);
            color: #006631;
        }

        .nc-btn--primary:hover:not(:disabled) {
            background: rgba(0, 154, 70, 0.22);
        }

        .nc-btn--danger {
            border-color: rgba(198, 40, 40, 0.35);
            color: #8b1a1a;
            background: rgba(198, 40, 40, 0.06);
        }

        .nc-btn--danger:hover:not(:disabled) {
            background: rgba(198, 40, 40, 0.11);
        }

        .nc-foot {
            padding: 0 1.25rem 1.25rem;
            font-size: 0.78rem;
            color: var(--nc-text-muted);
            line-height: 1.55;
        }

        .nc-foot code {
            font-family: var(--nc-mono);
            font-size: 0.85em;
            background: rgba(0, 0, 0, 0.05);
            padding: 0.1rem 0.35rem;
            border-radius: 4px;
        }

        .nc-toast {
            position: fixed;
            bottom: 1.25rem;
            left: 50%;
            transform: translateX(-50%) translateY(120%);
            max-width: min(90vw, 22rem);
            padding: 0.75rem 1.1rem;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--nc-text);
            background: var(--nc-surface-elevated);
            border: 1px solid var(--nc-border);
            border-radius: var(--nc-radius-sm);
            box-shadow: var(--nc-shadow);
            z-index: 2000;
            opacity: 0;
            transition: transform 0.28s ease, opacity 0.28s ease;
            pointer-events: none;
        }

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

        .nc-toast--warn {
            border-color: rgba(199, 125, 0, 0.45);
            background: #fff8e6;
            color: #5c4200;
        }

        @media (max-width: 600px) {
            #MainTable.nc-grid th.nc-row-head {
                width: 5.5rem;
                min-width: 5rem;
                font-size: 0.65rem;
                padding-right: 0.5rem;
            }

            .nc-hero {
                padding: 1.5rem 1rem 1.35rem;
            }
        }

.shell-main.number-converter-page-shell {
  margin: 0;
  padding: 0;
  border: none;
  box-shadow: none;
  border-radius: 0;
  background: transparent;
}

body[data-shell-active] .shell-main.number-converter-page-shell {
  padding: 0;
}

.shell-main.number-converter-page-shell .tool-page-header,
.shell-main.number-converter-page-shell .tool-lead {
  display: none;
}