/* ── Variables ── */
:root {
    --amber: #ffb000;
    --amber-dim: #c47a00;
    --amber-bright: #ffd060;
    --amber-glow: rgba(255, 176, 0, 0.13);
    --bg: #0a0700;
    --bg2: #100d00;
    --bg3: #181100;
    --border: #3a2800;
    --border-bright: #6b4400;
    --lh: 20px;
    --fs: 13px;
    --gw: 44px;
}
@media (max-width: 767px) {
    :root {
        --lh: 22px;
        --fs: 16px;
        --gw: 38px;
    }
}

/* ── Reset ── */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    background: var(--bg);
    color: var(--amber);
    font-family: "Share Tech Mono", monospace;
    font-size: var(--fs);
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

/* ── CRT effects ── */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.07) 2px,
        rgba(0, 0, 0, 0.07) 4px
    );
    pointer-events: none;
    z-index: 9000;
}
body::after {
    content: "";
    position: fixed;
    inset: 0;
    background: radial-gradient(
        ellipse at center,
        transparent 60%,
        rgba(0, 0, 0, 0.3) 100%
    );
    pointer-events: none;
    z-index: 9001;
}

@keyframes flicker {
    0%,
    100% {
        opacity: 1;
    }
    93% {
        opacity: 0.92;
    }
    94% {
        opacity: 1;
    }
    97% {
        opacity: 0.96;
    }
}
@keyframes ipanim {
    0%,
    100% {
        opacity: 0.55;
    }
    50% {
        opacity: 1;
    }
}
@keyframes fadein {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}
@keyframes fadein-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

/* ── Shell grid — desktop ── */
.shell {
    display: grid;
    grid-template-rows: auto 1fr auto;
    height: 100vh;
    height: 100dvh;
    animation: flicker 9s infinite;
}

/* ── Topbar ── */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 7px 14px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border-bright);
    flex-shrink: 0;
}
.logo {
    display: flex;
    align-items: center;
    font-family: "VT323", monospace;
    font-size: 27px;
    color: var(--amber-bright);
    text-shadow:
        0 0 18px var(--amber),
        0 0 36px rgba(255, 176, 0, 0.4);
    letter-spacing: 3px;
}
.logo sub {
    font-size: 14px;
    color: var(--amber-dim);
    letter-spacing: 1px;
    margin-left: 7px;
    vertical-align: middle;
}
.logo-image {
    height: 27px;
    width: auto;
}
@media (max-width: 767px) {
    .logo-image {
        height: 20px;
    }
}
.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 11px;
    color: var(--amber-dim);
}
#heap-info {
    display: none;
}
@media (min-width: 480px) {
    #heap-info {
        display: inline;
    }
}
.sp {
    padding: 2px 10px;
    border: 1px solid var(--border-bright);
    font-family: "VT323", monospace;
    font-size: 16px;
    border-radius: 2px;
    letter-spacing: 1px;
}
.sp.idle {
    color: var(--amber-dim);
}
.sp.running {
    color: #88ff44;
    border-color: #44aa22;
    text-shadow: 0 0 8px #44ff22;
}
.sp.paused {
    color: var(--amber-bright);
    border-color: var(--amber);
    text-shadow: 0 0 8px var(--amber);
}
.sp.error {
    color: #ff5544;
    border-color: #aa2222;
    text-shadow: 0 0 8px #ff3322;
}
.sp.done {
    color: #00ddff;
    border-color: #0088aa;
    text-shadow: 0 0 8px #00ccff;
}

/* ── Workspace — desktop ── */
.workspace {
    display: grid;
    grid-template-columns: 1fr 275px;
    overflow: hidden;
}

/* ── Editor pane ── */
.epane {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid var(--border);
}

/* ── Pane header ── */
.ph {
    font-family: "VT323", monospace;
    font-size: 16px;
    color: var(--amber-dim);
    letter-spacing: 2px;
    padding: 4px 12px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}
.pb {
    font-size: 11px;
    font-family: "Share Tech Mono", monospace;
    color: var(--border-bright);
    letter-spacing: 0;
}

.ewrap {
    flex: 1;
    position: relative;
    overflow: hidden;
}

#gutter {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--gw);
    background: var(--bg2);
    border-right: 1px solid var(--border);
    overflow: hidden;
    padding: 10px 0;
    pointer-events: none;
    z-index: 5;
}
.ln {
    display: block;
    height: var(--lh);
    line-height: var(--lh);
    text-align: right;
    padding-right: 7px;
    font-size: calc(var(--fs) - 1px);
    font-family: "Share Tech Mono", monospace;
    color: var(--border-bright);
}
.ln.aln {
    color: var(--amber-bright);
    text-shadow: 0 0 8px var(--amber);
}

#hll {
    position: absolute;
    left: var(--gw);
    right: 0;
    top: 0;
    bottom: 0;
    padding: 10px 12px 10px 0;
    font:
        var(--fs)/var(--lh) "Share Tech Mono",
        monospace;
    white-space: pre;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
}
.hl {
    display: block;
    height: var(--lh);
    line-height: var(--lh);
    white-space: pre;
}

#ipbar {
    position: absolute;
    left: var(--gw);
    right: 0;
    height: var(--lh);
    background: rgba(255, 176, 0, 0.1);
    box-shadow: inset 2px 0 0 var(--amber);
    pointer-events: none;
    z-index: 2;
    display: none;
    animation: ipanim 1.2s ease-in-out infinite;
}

#code {
    position: absolute;
    inset: 0;
    padding: 10px 12px 10px var(--gw);
    font:
        var(--fs)/var(--lh) "Share Tech Mono",
        monospace;
    background: transparent;
    color: rgba(255, 176, 0, 0.01);
    caret-color: var(--amber-bright);
    border: none;
    outline: none;
    resize: none;
    overflow: auto;
    white-space: pre;
    tab-size: 2;
    z-index: 4;
    -webkit-overflow-scrolling: touch;
}
#code::selection {
    background: rgba(255, 176, 0, 0.28);
    color: transparent;
}

/* ── Syntax colours ── */
.kw {
    color: #ffd060;
}
.reg {
    color: #ffaa20;
}
.mreg {
    color: #ff6a00;
} /* machine registers x0–xN */
.sv {
    color: #ff8800;
}
.str {
    color: #a8d840;
}
.arr {
    color: #a8d840;
}
.num {
    color: #ff7733;
}
.cmt {
    color: #4a3a12;
}
.op {
    color: #7a5520;
}
.lbl {
    color: #ffc870;
    font-style: italic;
}
.dflt {
    color: var(--amber);
}

/* ── Autocomplete ── */
#ac {
    position: absolute;
    min-width: 230px;
    max-height: 180px;
    background: var(--bg3);
    border: 1px solid var(--amber-dim);
    z-index: 30;
    display: none;
    overflow-y: auto;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.75);
}
#ac.show {
    display: block;
}
.aci {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 5px 11px;
    cursor: pointer;
    font-family: "Share Tech Mono", monospace;
    min-height: 34px;
}
.aci:hover,
.aci.s {
    background: rgba(255, 176, 0, 0.12);
}
.aci-n {
    color: var(--amber-bright);
    font-size: 13px;
    white-space: nowrap;
}
.aci-h {
    color: var(--amber-dim);
    font-size: 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}
@media (max-width: 767px) {
    #ac {
        display: none !important;
    }
}

/* ── Right pane — desktop ── */
.rpane {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg2);
}

/* Mobile tab bar — hidden on desktop */
.mob-tabbar {
    display: none;
}

/* Sections */
.rs-wrap {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Register bank tabs */
.reg-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    background: var(--bg3);
}
.reg-tab {
    font-family: "VT323", monospace;
    font-size: 14px;
    letter-spacing: 1px;
    padding: 3px 12px;
    color: var(--amber-dim);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.1s;
    white-space: nowrap;
    min-height: 26px;
    display: flex;
    align-items: center;
    touch-action: manipulation;
}
.reg-tab:hover {
    color: var(--amber);
}
.reg-tab.act {
    color: var(--amber-bright);
    border-bottom-color: var(--amber);
    background: var(--amber-glow);
}

#rs {
    flex-shrink: 0;
}
#sk {
    flex: 0 0 auto;
    max-height: 88px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow-y: auto;
}
#op {
    flex: 1;
    overflow: hidden;
}

.rg {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    padding: 5px 7px;
}
.rr {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 3px 5px;
    border-radius: 2px;
    transition: background 0.15s;
}
.rr.chg {
    background: rgba(255, 176, 0, 0.1);
}
.rn {
    color: var(--amber-dim);
    font-size: 11px;
    width: 22px;
    flex-shrink: 0;
}
.rn.mn {
    color: #ff6a00;
} /* machine register label */
.rv {
    color: var(--amber-bright);
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}
.rt {
    font-size: 9px;
    color: var(--border-bright);
    padding: 0 3px;
    border: 1px solid var(--border);
    border-radius: 1px;
    flex-shrink: 0;
}

.ski {
    font-size: 11px;
    color: var(--amber-dim);
    padding: 2px 13px;
}
.ski.top {
    color: var(--amber);
}

.oa {
    flex: 1;
    overflow-y: auto;
    padding: 5px 8px;
    -webkit-overflow-scrolling: touch;
}
.ol {
    font-size: 12px;
    line-height: 18px;
    padding: 1px 4px;
    color: var(--amber-bright);
    border-left: 2px solid transparent;
    white-space: pre-wrap;
    word-break: break-all;
}
.ol.err {
    color: #ff6644;
    border-left-color: #ff4422;
}
.ol.sys {
    color: var(--border-bright);
    font-size: 11px;
}

/* ── Toolbar ── */
.toolbar {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    background: var(--bg2);
    border-top: 1px solid var(--border-bright);
    flex-shrink: 0;
    flex-wrap: wrap;
}
.btn {
    font-family: "VT323", monospace;
    font-size: 18px;
    letter-spacing: 0.5px;
    padding: 4px 13px 5px;
    background: var(--bg3);
    border: 1px solid var(--border-bright);
    color: var(--amber);
    cursor: pointer;
    border-radius: 2px;
    transition: all 0.1s;
    outline: none;
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    touch-action: manipulation;
}
.btn:hover {
    background: rgba(255, 176, 0, 0.09);
    border-color: var(--amber);
    color: var(--amber-bright);
    box-shadow: 0 0 9px rgba(255, 176, 0, 0.18);
}
.btn:active {
    opacity: 0.7;
    transform: translateY(1px);
}
.btn.primary {
    border-color: var(--amber);
    color: var(--amber-bright);
}
.btn.bon {
    background: rgba(255, 176, 0, 0.12);
    border-color: var(--amber-bright);
}
.btn.danger:hover {
    border-color: #ff4444;
    color: #ff6644;
}
.btn:disabled {
    opacity: 0.28;
    cursor: not-allowed;
    transform: none;
}
.ts {
    width: 1px;
    height: 22px;
    background: var(--border);
    margin: 0 3px;
    flex-shrink: 0;
}
#speed {
    appearance: none;
    background: var(--bg3);
    border: 1px solid var(--border-bright);
    color: var(--amber);
    font-family: "Share Tech Mono", monospace;
    font-size: 11px;
    padding: 3px 6px;
    cursor: pointer;
    border-radius: 2px;
    height: 38px;
}
.slb {
    font-size: 11px;
    color: var(--amber-dim);
    white-space: nowrap;
}
.ipc {
    font-size: 11px;
    color: var(--amber-dim);
    margin-left: auto;
    white-space: nowrap;
}
.ipc span {
    color: var(--amber);
}

/* ── Docs overlay ── */
.dov {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    z-index: 5000;
    display: none;
    align-items: stretch;
    justify-content: flex-end;
}
.dov.open {
    display: flex;
}
.dp {
    width: 530px;
    max-width: 100vw;
    background: var(--bg2);
    border-left: 1px solid var(--border-bright);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: fadein 0.18s ease;
}
.dh {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg3);
    border-bottom: 1px solid var(--border-bright);
    flex-shrink: 0;
}
.dt {
    font-family: "VT323", monospace;
    font-size: 24px;
    color: var(--amber-bright);
    letter-spacing: 2px;
    text-shadow: 0 0 14px var(--amber);
}
.dx {
    font-family: "VT323", monospace;
    font-size: 22px;
    color: var(--amber-dim);
    background: none;
    border: 1px solid var(--border);
    padding: 1px 10px;
    cursor: pointer;
    border-radius: 2px;
    min-height: 38px;
    touch-action: manipulation;
}
.dx:hover {
    color: var(--amber-bright);
    border-color: var(--amber);
}
.dtabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.dtab {
    font-family: "VT323", monospace;
    font-size: 16px;
    letter-spacing: 1px;
    padding: 6px 14px;
    color: var(--amber-dim);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.1s;
    white-space: nowrap;
    flex-shrink: 0;
    min-height: 38px;
    touch-action: manipulation;
}
.dtab:hover {
    color: var(--amber);
}
.dtab.act {
    color: var(--amber-bright);
    border-bottom-color: var(--amber);
    background: var(--amber-glow);
}
.db {
    flex: 1;
    overflow-y: auto;
    padding: 16px 18px;
    -webkit-overflow-scrolling: touch;
}
.db .sec {
    margin-bottom: 22px;
}
.db h3 {
    font-family: "VT323", monospace;
    font-size: 19px;
    color: var(--amber-bright);
    letter-spacing: 2px;
    margin-bottom: 9px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 4px;
}
.db p {
    font-size: 12px;
    line-height: 1.7;
    color: var(--amber-dim);
    margin-bottom: 8px;
}
.db p strong {
    color: var(--amber);
}
.db code {
    font-family: "Share Tech Mono", monospace;
    font-size: 11px;
    color: var(--amber-bright);
    background: rgba(255, 176, 0, 0.07);
    padding: 1px 5px;
    border: 1px solid var(--border);
    border-radius: 2px;
}
.db pre {
    font-family: "Share Tech Mono", monospace;
    font-size: 11.5px;
    color: var(--amber);
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border);
    border-left: 2px solid var(--amber-dim);
    padding: 10px 13px;
    margin: 8px 0 4px;
    overflow-x: auto;
    line-height: 1.65;
}
.tbl {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
    margin: 6px 0;
}
.tbl th {
    color: var(--amber-dim);
    text-align: left;
    padding: 3px 8px 5px;
    border-bottom: 1px solid var(--border-bright);
    font-family: "VT323", monospace;
    font-size: 14px;
    letter-spacing: 1px;
}
.tbl td {
    padding: 4px 8px;
    border-bottom: 1px solid var(--border);
    color: var(--amber-dim);
    vertical-align: top;
}
.tbl td:first-child {
    color: var(--amber-bright);
    white-space: nowrap;
    font-family: "Share Tech Mono", monospace;
}
.tbl tr:hover td {
    background: var(--amber-glow);
}
.note {
    font-size: 11px;
    color: var(--border-bright);
    background: rgba(255, 176, 0, 0.04);
    border: 1px solid var(--border);
    padding: 7px 10px;
    border-radius: 2px;
    margin: 8px 0;
}

/* ════════════════════════════════════════════
       MOBILE OVERRIDES  ( ≤ 767px )
    ════════════════════════════════════════════ */
@media (max-width: 767px) {
    .shell {
        grid-template-rows: auto 1fr auto auto;
    }
    .workspace {
        display: contents;
    }
    .epane {
        border-right: none;
        overflow: hidden;
    }
    #code,
    #gutter,
    #hll {
        padding-bottom: 40px;
    }

    .rpane {
        border-top: 2px solid var(--border-bright);
        border-right: none;
        height: 220px;
        min-height: 40px;
        transition: height 0.2s ease;
        flex-shrink: 0;
    }
    .rpane.mob-collapsed {
        height: 40px;
    }

    .mob-tabbar {
        display: flex;
        align-items: stretch;
        height: 40px;
        flex-shrink: 0;
        border-bottom: 1px solid var(--border);
        background: var(--bg3);
    }
    .rtab {
        font-family: "VT323", monospace;
        font-size: 17px;
        letter-spacing: 1px;
        flex: 1;
        background: none;
        border: none;
        border-right: 1px solid var(--border);
        color: var(--amber-dim);
        cursor: pointer;
        min-height: 40px;
        touch-action: manipulation;
        transition: all 0.1s;
    }
    .rtab:active {
        background: rgba(255, 176, 0, 0.1);
    }
    .rtab.act {
        color: var(--amber-bright);
        background: rgba(255, 176, 0, 0.1);
        border-bottom: 2px solid var(--amber);
    }
    .rtog {
        width: 46px;
        flex-shrink: 0;
        background: none;
        border: none;
        border-left: 1px solid var(--border);
        color: var(--amber-dim);
        cursor: pointer;
        font-size: 18px;
        line-height: 1;
        touch-action: manipulation;
        transition: all 0.1s;
    }
    .rtog:active {
        background: rgba(255, 176, 0, 0.1);
    }

    .rs-wrap > .ph {
        display: none;
    }
    .reg-tabs {
        display: none;
    }

    .rs-wrap {
        display: none;
    }
    #rs.mob-vis,
    #sk.mob-vis,
    #op.mob-vis {
        display: flex;
        flex-direction: column;
        flex: 1;
        overflow: hidden;
    }
    #sk.mob-vis {
        max-height: unset;
        border: none;
    }
    #rs.mob-vis {
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .toolbar {
        padding: 5px 8px;
        gap: 4px;
    }
    .btn {
        font-size: 17px;
        padding: 4px 10px 5px;
        min-height: 42px;
    }
    .ts {
        height: 20px;
        margin: 0 2px;
    }
    .slb {
        font-size: 10px;
    }
    #speed {
        font-size: 10px;
        padding: 2px 4px;
        height: 42px;
    }
    .ipc {
        display: none;
    }
    @media (min-width: 480px) {
        .ipc {
            display: block;
            font-size: 10px;
        }
    }

    .dp {
        width: 100vw;
        border-left: none;
        animation: fadein-up 0.18s ease;
    }
    .dov {
        justify-content: center;
        align-items: flex-end;
    }
    .dp {
        max-height: 90vh;
        border-top: 2px solid var(--border-bright);
    }
}

/* ════════════════════════════════════════════
   MCU SIMULATION PANEL
   ════════════════════════════════════════════ */

/* ════════════════════════════════════════════
   MCU TAB — reg-tab styling (orange accent)
   ════════════════════════════════════════════ */
.reg-tab[data-bank="mcu"].act {
    color: #ff9944;
    border-bottom-color: #ff6a00;
    background: rgba(255, 106, 0, 0.1);
}
.reg-tab[data-bank="mcu"] {
    color: #7a3800;
}
.reg-tab[data-bank="mcu"]:hover {
    color: #ff6a00;
}

/* ════════════════════════════════════════════
   MCU VIEW  (replaces #regs when MCU tab active)
   ════════════════════════════════════════════ */
.mcu-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 8px 8px;
    gap: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* ── Row wrappers ── */
.mcu-row {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}
.mcu-top {
    height: 36px;
    align-items: flex-end;
}
.mcu-bot {
    height: 36px;
    align-items: flex-start;
}
.mcu-mid {
    gap: 0;
}

/* ── Redstone wire (SVG) ── */
.mcu-wire-zone {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.mcu-wire-v {
    width: 20px;
    height: 36px;
    flex-direction: column;
}
.mcu-wire-h {
    width: 28px;
    height: 20px;
}
.mcu-wire-svg {
    width: 100%;
    height: 100%;
    display: block;
    overflow: visible;
}

/* Wire fill — set directly from JS via inline style; this is the initial/fallback. */
.rs-wire {
    fill: #6b0a00;
    transition: fill 0.12s;
}

/* Direction label — base */
.mcu-dir-tag {
    font-family: "VT323", monospace;
    font-size: 11px;
    color: var(--amber-dim);
    letter-spacing: 1px;
    text-align: center;
    line-height: 1;
    flex-shrink: 0;
    user-select: none;
}
/* FRONT label: below the SVG (near block = bottom of top-wire row) */
.mcu-dir-below {
    order: 2;      /* after the SVG */
    margin-top: 2px;
}
/* BACK label: above the SVG (near block = top of bot-wire row) */
.mcu-dir-above {
    order: 0;      /* before the SVG */
    margin-bottom: 2px;
}
/* LEFT / RIGHT labels: vertical text, sits between wire and block */
.mcu-dir-side {
    font-size: 10px;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    margin: 0;
    line-height: 1;
}

/* ── Left / Right side zones ── */
/* Both zones are plain row, label placement handled by DOM order */
.mcu-side-zone {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 2px;
}

/* ── Central block: fixed square, 3×3 cross grid ── */
.mcu-block {
    width: 148px;
    height: 148px;
    background: var(--bg3);
    border: 2px solid #ff6a00;
    box-shadow:
        0 0 12px rgba(255, 106, 0, 0.3),
        inset 0 0 14px rgba(255, 106, 0, 0.06);
    border-radius: 2px;
    flex-shrink: 0;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    grid-template-rows: 1fr auto 1fr;
    gap: 2px;
    padding: 5px;
    overflow: hidden;
}
.mcu-cross-empty {
    /* filler cells in the cross corners */
}
.mcu-cross-center {
    /* true center — could add a dot or leave blank */
}
.mcu-reg-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
    justify-content: center;
    min-width: 0;
}

.mcu-rm-row {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 2px 3px;
    border-radius: 1px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border);
    transition: background 0.12s, border-color 0.12s;
    white-space: nowrap;
}
/* Output row: glows green when active */
.mcu-rm-row.out-row.active {
    background: rgba(136, 255, 68, 0.07);
    border-color: rgba(136, 255, 68, 0.25);
}
.mcu-rm-name {
    font-family: "VT323", monospace;
    font-size: 11px;
    width: 16px;
    flex-shrink: 0;
    line-height: 1;
}
.mcu-rm-out { color: #ff6a00; }
.mcu-rm-in  { color: #ff9944; }

.mcu-rm-val {
    font-family: "Share Tech Mono", monospace;
    font-size: 9px;
    color: var(--amber-bright);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
    flex: 1;
    line-height: 1;
    transition: color 0.12s;
}
.mcu-rm-row.out-row.active .mcu-rm-val {
    color: #88ff44;
}
.mcu-rm-row.in-row .mcu-rm-val {
    color: #ffb060;
}

/* ── Analog input row (all 4 at bottom) ── */
.mcu-inputs-row {
    display: flex;
    gap: 6px;
    margin-top: 6px;
    justify-content: center;
    flex-wrap: wrap;
}
.mcu-input-grp {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}
.mcu-in-lbl {
    font-family: "VT323", monospace;
    font-size: 10px;
    color: #ff9944;
    letter-spacing: 0.5px;
    line-height: 1;
}
.mcu-num-input {
    width: 40px;
    background: var(--bg);
    border: 1px solid #7a3800;
    color: #ff9944;
    font-family: "VT323", monospace;
    font-size: 16px;
    text-align: center;
    padding: 1px 2px;
    border-radius: 2px;
    outline: none;
    -moz-appearance: textfield;
    appearance: textfield;
}
.mcu-num-input::-webkit-inner-spin-button,
.mcu-num-input::-webkit-outer-spin-button {
    -webkit-appearance: none;
}
.mcu-num-input:focus {
    border-color: #ff6a00;
    box-shadow: 0 0 6px rgba(255,106,0,0.3);
}

/* ── Scrollbars ── */
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: var(--border-bright);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--amber-dim);
}