:root {
    --ink: #eef7ef;
    --ink-soft: #a6b9ad;
    --ink-mute: #63766b;
    --void: #050807;
    --field: #0b1210;
    --field-2: #101a16;
    --field-3: #16241f;
    --line: rgba(176, 255, 207, 0.13);
    --line-strong: rgba(176, 255, 207, 0.27);
    --green: #2ce27f;
    --green-2: #0f6b43;
    --green-3: #0b3f2d;
    --gold: #d9a02e;
    --blue: #62a8ff;
    --red: #ff6969;
    --shadow: 0 24px 80px rgba(0,0,0,0.42);
    --mono: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --display: 'Syne', Inter, system-ui, sans-serif;
    --sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--void); }
body {
    min-height: 100vh;
    color: var(--ink);
    font-family: var(--sans);
    line-height: 1.5;
    background:
        radial-gradient(circle at 12% -10%, rgba(44, 226, 127, 0.18), transparent 28rem),
        radial-gradient(circle at 92% 8%, rgba(217, 160, 46, 0.11), transparent 24rem),
        linear-gradient(145deg, #040605 0%, #08110d 50%, #040605 100%);
}
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: linear-gradient(to bottom, black, transparent 82%);
    z-index: 0;
}
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(90deg, rgba(44,226,127,.05), transparent 18%, transparent 82%, rgba(217,160,46,.05));
    z-index: 0;
}

a { color: inherit; }
button, input, select { font: inherit; }
button { border: 0; }

.shell-top {
    position: sticky;
    top: 0;
    z-index: 20;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 1rem;
    min-height: 74px;
    padding: 0.85rem clamp(1rem, 3vw, 2.5rem);
    background: rgba(5, 8, 7, 0.76);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: .8rem;
    text-decoration: none;
}
.brand-mark img {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 14px;
    background: rgba(255,255,255,.06);
    border: 1px solid var(--line);
    padding: 4px;
}
.brand-text {
    display: grid;
    gap: .05rem;
}
.brand-name {
    font-family: var(--display);
    font-weight: 800;
    letter-spacing: -.04em;
    font-size: 1.2rem;
}
.brand-name span { color: var(--green); }
.brand-kicker, .top-meta, .micro, .label-hint, .stat-label, .meta-label, .panel-code {
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: .09em;
}
.brand-kicker { color: var(--ink-mute); font-size: .64rem; }
.top-meta {
    justify-self: center;
    display: flex;
    align-items: center;
    gap: .6rem;
    color: var(--ink-soft);
    font-size: .7rem;
    min-width: 0;
}
.config-chip, .user-chip, .nav-chip, .back-btn {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    max-width: min(36vw, 430px);
    padding: .62rem .8rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(16, 26, 22, .75);
    color: var(--ink-soft);
    text-decoration: none;
    font-family: var(--mono);
    font-size: .72rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.config-chip a { color: var(--green); text-decoration: none; overflow: hidden; text-overflow: ellipsis; }
.config-chip.is-default { color: var(--ink-mute); }
.top-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: .65rem;
    flex-wrap: wrap;
}
.nav-chip, .back-btn { cursor: pointer; transition: .18s ease; }
.nav-chip:hover, .back-btn:hover { border-color: var(--line-strong); color: var(--ink); transform: translateY(-1px); }
.nav-chip.is-hot, .back-btn.is-hot {
    background: linear-gradient(135deg, rgba(44,226,127,.22), rgba(15,107,67,.75));
    border-color: rgba(44,226,127,.35);
    color: #fff;
}
.user-chip { max-width: 260px; }
.logout-link { color: var(--ink-mute); text-decoration: none; }
.logout-link:hover { color: var(--red); }

main, .stage, .history-main, .panel-shell {
    position: relative;
    z-index: 1;
}
.stage {
    width: min(1720px, 100%);
    margin: 0 auto;
    padding: clamp(1.25rem, 3vw, 3rem);
}
.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .55fr);
    gap: clamp(1rem, 3vw, 2rem);
    align-items: stretch;
    margin-bottom: 1.5rem;
}
.hero-copy {
    min-height: 260px;
    padding: clamp(1.5rem, 4vw, 3rem);
    border: 1px solid var(--line);
    border-radius: 30px;
    background:
        linear-gradient(135deg, rgba(44,226,127,.11), transparent 38%),
        linear-gradient(180deg, rgba(16,26,22,.92), rgba(7,13,11,.86));
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
}
.hero-copy::after {
    content: 'G54  •  DXF  •  NC';
    position: absolute;
    right: -1rem;
    bottom: .5rem;
    font-family: var(--mono);
    font-size: clamp(2rem, 8vw, 7rem);
    letter-spacing: -.08em;
    color: rgba(255,255,255,.035);
    white-space: nowrap;
}
.eyebrow, .micro {
    color: var(--green);
    font-size: .72rem;
    margin-bottom: .8rem;
}
.hero-copy h1, .history-title, .panel-logo-text {
    font-family: var(--display);
    font-weight: 800;
    letter-spacing: -.065em;
    line-height: .92;
}
.hero-copy h1 { font-size: clamp(3.1rem, 8vw, 7.7rem); max-width: 820px; }
.hero-copy p { color: var(--ink-soft); margin-top: 1rem; max-width: 650px; }
.hero-card {
    display: grid;
    align-content: space-between;
    gap: 1rem;
    padding: 1.2rem;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: rgba(11,18,16,.72);
    box-shadow: var(--shadow);
}
.hero-card .quick-row { display: grid; grid-template-columns: 1fr; gap: .75rem; }
.big-link, .primary, button.primary, #generateBtn, #driveBtn, .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .55rem;
    min-height: 48px;
    padding: .85rem 1rem;
    border-radius: 18px;
    border: 1px solid rgba(44,226,127,.38);
    color: #f8fff9;
    background: linear-gradient(135deg, #11834f, #0b462f);
    text-decoration: none;
    font-family: var(--mono);
    font-size: .82rem;
    cursor: pointer;
    transition: transform .18s ease, border-color .18s ease, filter .18s ease;
}
.big-link.secondary, .secondary, button.secondary, #downloadBtn, .btn-secondary, .icon-button, .mode-button, .playback-button {
    background: rgba(255,255,255,.035);
    color: var(--ink-soft);
    border: 1px solid var(--line);
}
.big-link:hover, button:hover:not(:disabled), .primary:hover, .secondary:hover, .btn-primary:hover, .btn-secondary:hover {
    transform: translateY(-1px);
    filter: brightness(1.07);
    border-color: var(--line-strong);
}
button:disabled, #generateBtn:disabled, #downloadBtn:disabled, #driveBtn:disabled {
    opacity: .48;
    cursor: not-allowed;
    transform: none !important;
    filter: none !important;
}
.quick-note {
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 1rem;
    background: rgba(255,255,255,.025);
    color: var(--ink-soft);
    font-size: .9rem;
}

.command-layout {
    display: grid;
    grid-template-columns: minmax(340px, 430px) minmax(0, 1fr) minmax(320px, 390px);
    gap: 1rem;
    align-items: start;
}
.rail, .viewport-card, .recipe-card, .job-card, .archive-panel, .panel-content {
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(16,26,22,.88), rgba(7,13,11,.88));
    border-radius: 26px;
    box-shadow: 0 18px 60px rgba(0,0,0,.25);
}
.rail, .recipe-card, .viewport-card { padding: 1rem; }
.panel-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}
.panel-title {
    font-family: var(--display);
    font-weight: 800;
    letter-spacing: -.04em;
    font-size: 1.25rem;
}
.panel-code { color: var(--ink-mute); font-size: .66rem; }
.panel-copy { color: var(--ink-soft); font-size: .86rem; margin-top: .25rem; }

.drop-zone {
    min-height: 230px;
    display: grid;
    place-items: center;
    text-align: center;
    cursor: pointer;
    border-radius: 28px;
    border: 1px dashed rgba(44,226,127,.35);
    background:
        radial-gradient(circle at center, rgba(44,226,127,.11), transparent 68%),
        rgba(5,8,7,.72);
    transition: .2s ease;
}
.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--green);
    background: radial-gradient(circle at center, rgba(44,226,127,.2), transparent 70%), rgba(9,19,15,.9);
    transform: translateY(-1px);
}
.drop-zone-icon, .file-info-icon, .empty-state-icon {
    width: 54px;
    height: 54px;
    margin: 0 auto .9rem;
    border-radius: 20px;
    border: 1px solid rgba(44,226,127,.3);
    background: linear-gradient(135deg, rgba(44,226,127,.25), rgba(255,255,255,.03));
    position: relative;
}
.drop-zone-icon::before { content: 'DXF'; position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--mono); font-size: .75rem; color: var(--green); }
.drop-zone-text { color: var(--ink); font-family: var(--display); font-weight: 700; font-size: 1.12rem; }
.drop-zone-subtext { color: var(--ink-mute); margin-top: .35rem; font-size: .84rem; }
.file-loaded-card, #fileLoadedCard {
    border-radius: 24px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.03);
    padding: 1rem;
}
.file-info { display: flex; gap: .85rem; align-items: center; }
.file-info-icon { width: 42px; height: 42px; margin: 0; border-radius: 14px; }
.file-info-icon::before { content:'NC'; position:absolute; inset:0; display:grid; place-items:center; font-family:var(--mono); color:var(--green); font-size:.72rem; }
.file-info-name { font-weight: 700; color: var(--ink); word-break: break-word; }
.file-info-size, .upload-different, #statusMessage { color: var(--ink-mute); font-family: var(--mono); font-size: .75rem; }
.upload-different { margin-top: .8rem; }
.upload-different a { color: var(--green); text-decoration: none; }

.recipe-card { position: sticky; top: 90px; }
#paramForm { display: grid; gap: .9rem; }
.param-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.param-group { display: grid; gap: .42rem; }
.param-group.span-2, .span-2 { grid-column: 1 / -1; }
label { color: var(--ink); font-weight: 650; font-size: .88rem; }
.label-hint { display: block; color: var(--ink-mute); font-weight: 400; font-size: .62rem; margin-top: .16rem; }
input[type='number'], select, .speed-select {
    width: 100%;
    min-height: 44px;
    color: var(--ink);
    background: rgba(5,8,7,.72);
    border: 1px solid var(--line);
    border-radius: 15px;
    padding: .68rem .78rem;
    outline: none;
}
input[type='number']:focus, select:focus { border-color: rgba(44,226,127,.48); box-shadow: 0 0 0 3px rgba(44,226,127,.09); }
input[readonly] { opacity: .7; cursor: not-allowed; }
.section-rule { height: 1px; background: var(--line); margin: .3rem 0; }
.check-card {
    border: 1px solid var(--line);
    background: rgba(255,255,255,.025);
    border-radius: 18px;
    padding: .85rem;
}
.check-card label { display: flex; gap: .65rem; align-items: flex-start; cursor: pointer; }
input[type='checkbox'] { accent-color: var(--green); width: 18px; height: 18px; margin-top: .05rem; }
#tubeParams { display: none; }
.nest-note, .warning-message, .info-message, .alert {
    border-radius: 18px;
    padding: .85rem;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.025);
    color: var(--ink-soft);
    font-size: .84rem;
}
.warning-message { border-color: rgba(217,160,46,.35); color: #ffd27b; background: rgba(217,160,46,.08); }
.info-message, .alert.info { border-color: rgba(98,168,255,.32); color: #afd2ff; background: rgba(98,168,255,.08); }

.action-stack { display: grid; gap: 1rem; margin-top: 1rem; }
.generate-card { padding: 1rem; border: 1px solid var(--line); border-radius: 26px; background: rgba(255,255,255,.025); }
.generate-row { display: grid; }
.loading, .alert, .results { display: none; margin-top: 1rem; }
.loading.show, .alert.show, .results.show { display: block; }
.loading { color: var(--ink-soft); font-family: var(--mono); font-size: .8rem; }
.spinner {
    width: 24px; height: 24px; border-radius: 50%; border: 3px solid rgba(255,255,255,.12); border-top-color: var(--green); display: inline-block; vertical-align: middle; margin-right: .7rem; animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.alert.error { border-color: rgba(255,105,105,.36); color: #ff9a9a; background: rgba(255,105,105,.08); }
.alert-title, .results-title { font-family: var(--display); font-weight: 800; margin-bottom: .35rem; }
.results { border-color: rgba(44,226,127,.28); background: rgba(44,226,127,.06); }
.stats { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: .7rem; margin-top: .8rem; }
.stat { border: 1px solid var(--line); background: rgba(5,8,7,.55); border-radius: 16px; padding: .75rem; }
.stat-value { font-family: var(--display); font-size: 1.4rem; font-weight: 800; color: var(--green); }
.stat-label { color: var(--ink-mute); font-size: .62rem; }
.console-output { margin-top: .75rem; padding: .8rem; border: 1px solid var(--line); border-radius: 16px; background: #030504; color: var(--ink-soft); font-family: var(--mono); font-size: .75rem; white-space: pre-wrap; max-height: 240px; overflow: auto; }

.viewport-card { min-height: 760px; }
.viewport-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 1rem; }
.mode-toggle { display: flex; gap: .45rem; align-items: center; }
.mode-button { min-height: 36px; border-radius: 13px; padding: .5rem .75rem; font-family: var(--mono); font-size: .74rem; cursor: pointer; }
.mode-button.active { background: rgba(44,226,127,.18); border-color: rgba(44,226,127,.38); color: var(--green); }
.stock-size-display { display: inline-flex; gap: .55rem; align-items: center; padding: .55rem .75rem; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-soft); font-family: var(--mono); font-size: .74rem; margin-bottom: .75rem; }
.stock-size-value, .rotation-display { color: var(--green); }
#dxf-setup-container { display: grid; gap: .75rem; }
.setup-label, .controls-label, .scrubber-operation, .speed-control label { color: var(--ink-mute); font-size: .78rem; }
#dxfSetupCanvas, #canvas-container {
    width: 100%;
    border-radius: 24px;
    border: 1px solid var(--line);
    background: radial-gradient(circle at center, rgba(44,226,127,.06), transparent 68%), #020403;
    overflow: hidden;
}
#dxfSetupCanvas { min-height: 520px; display: block; }
#canvas-container { position: relative; min-height: 590px; height: 590px; display: grid; place-items: center; }
#gcodeCanvas { width: 100%; height: 100%; display: block; }
.empty-state { color: var(--ink-mute); text-align: center; position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; }
.empty-state > div:last-child { max-width: 280px; }
.setup-controls, .controls, .scrubber-container, .playback-controls {
    display: flex;
    gap: .75rem;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.025);
    border-radius: 18px;
    padding: .75rem;
    margin-top: .75rem;
}
.control-group { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.icon-button, .playback-button { border-radius: 14px; min-height: 38px; padding: .55rem .75rem; color: var(--ink-soft); cursor: pointer; }
.playback-button { width: 42px; padding: 0; }
.playback-button.playing { background: rgba(44,226,127,.18); border-color: rgba(44,226,127,.38); color: var(--green); }
.scrubber-container { display: block; }
.scrubber-header { display: flex; justify-content: space-between; gap: 1rem; font-family: var(--mono); color: var(--ink-soft); font-size: .74rem; margin-bottom: .65rem; }
.toolpath-scrubber { width: 100%; accent-color: var(--green); }
.playback-controls { justify-content: flex-start; }
.speed-control { display: flex; align-items: center; gap: .55rem; }
.gcode-actions, #gcodeButtons { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
#driveStatus { color: var(--ink-soft); font-family: var(--mono); }

.modal-overlay { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 1rem; background: rgba(2,4,3,.84); backdrop-filter: blur(18px); }
.modal-content { width: min(560px, 100%); border: 1px solid var(--line-strong); border-radius: 26px; padding: 1.2rem; background: var(--field); box-shadow: var(--shadow); }
.modal-header { font-family: var(--display); font-size: 1.45rem; font-weight: 800; margin-bottom: 1rem; }
.part-list { display: grid; gap: .7rem; }
.part-option { display: flex; justify-content: space-between; align-items: center; gap: .75rem; padding: .8rem; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.025); cursor: pointer; }
.part-option.selected, .part-option:hover { border-color: rgba(44,226,127,.45); background: rgba(44,226,127,.08); }
.part-name { font-weight: 700; }
.part-info { color: var(--ink-mute); font-family: var(--mono); font-size: .72rem; }
.part-badge, .badge { border: 1px solid var(--line); border-radius: 999px; padding: .2rem .5rem; font-family: var(--mono); font-size: .64rem; color: var(--green); margin-left: .35rem; }
.modal-actions { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-top: 1rem; }

.history-main { width: min(1240px, 100%); margin: 0 auto; padding: clamp(1.25rem, 3vw, 3rem); }
.history-hero { display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: end; margin-bottom: 1.3rem; }
.history-title { font-size: clamp(3rem, 8vw, 6.4rem); }
.history-title span { color: var(--green); }
.history-sub { color: var(--ink-soft); margin-top: .5rem; }
.archive-panel { padding: 1rem; }
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: .75rem; margin-bottom: 1rem; }
.job-list { display: grid; gap: .8rem; }
.job-card { padding: 1rem; display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: center; transition: .18s ease; }
.job-card:hover { transform: translateY(-1px); border-color: var(--line-strong); }
.job-top { display: flex; flex-wrap: wrap; gap: .55rem; align-items: center; margin-bottom: .8rem; }
.job-name { font-family: var(--display); font-weight: 800; letter-spacing: -.03em; font-size: 1.05rem; }
.job-filename { color: var(--ink-mute); font-family: var(--mono); font-size: .72rem; border: 1px solid var(--line); border-radius: 999px; padding: .24rem .55rem; }
.badge-onshape { color: var(--blue); border-color: rgba(98,168,255,.3); }
.badge-manual { color: var(--ink-mute); }
.job-meta { display: grid; grid-template-columns: repeat(6, minmax(90px, 1fr)); gap: .65rem; }
.meta-item { border-top: 1px solid var(--line); padding-top: .45rem; }
.meta-label { color: var(--ink-mute); font-size: .6rem; }
.meta-value { color: var(--ink-soft); font-family: var(--mono); font-size: .78rem; }
.meta-value.highlight { color: var(--green); }
.job-timestamp { color: var(--ink-mute); font-family: var(--mono); font-size: .72rem; margin-top: .65rem; }
.download-btn { display: inline-flex; align-items: center; justify-content:center; min-height: 44px; padding: .75rem 1rem; border-radius: 16px; background: rgba(44,226,127,.16); border:1px solid rgba(44,226,127,.35); color: var(--green); text-decoration:none; font-family:var(--mono); font-size:.78rem; white-space:nowrap; }
.empty-state-page { text-align: center; padding: 5rem 1rem; color: var(--ink-soft); }
.empty-state-page h2 { font-family: var(--display); font-size: 2rem; color: var(--ink); margin-bottom: .5rem; }

.panel-shell { padding: 14px; min-height: 100vh; background: linear-gradient(145deg,#07100d,#020403); }
.panel-content { padding: 14px; border-radius: 24px; }
.panel-logo { display:flex; align-items:center; justify-content:center; gap:.6rem; margin-bottom: .8rem; }
.panel-logo img { width: 30px; height:30px; border-radius:10px; }
.panel-logo-text { font-size: 1.22rem; }
.panel-logo-text span { color: var(--green); }
.mode-selector { border: 1px solid var(--line); border-radius: 20px; padding: .85rem; background: rgba(255,255,255,.025); }
.mode-title { color: var(--ink); font-weight: 750; margin-bottom: .55rem; }
.mode-switch-container { display:flex; align-items:center; justify-content:center; gap:.6rem; }
.mode-label-text { font-family: var(--mono); color: var(--ink-mute); font-size: .76rem; }
.mode-label-text.active { color: var(--green); }
.mode-switch { position:relative; width:52px; height:28px; display:inline-block; }
.mode-switch input { opacity:0; width:0; height:0; }
.mode-slider { position:absolute; inset:0; border-radius:999px; background: rgba(255,255,255,.08); border:1px solid var(--line); cursor:pointer; }
.mode-slider::before { content:''; position:absolute; width:20px; height:20px; top:3px; left:4px; border-radius:50%; background: var(--green); transition:.2s; }
.mode-switch input:checked + .mode-slider::before { transform: translateX(23px); }
.mode-hint, .instruction { color: var(--ink-soft); font-size:.82rem; text-align:center; margin-top:.65rem; }
.instruction { padding: 1.3rem .5rem; border:1px dashed var(--line); border-radius:20px; margin-top:.8rem; }
.button-group { display:grid; gap:.65rem; margin-top:.85rem; }

footer, .footnote { position:relative; z-index:1; text-align:center; padding: 2rem; color: var(--ink-mute); font-family: var(--mono); font-size:.68rem; }

@media (max-width: 1320px) {
    .command-layout { grid-template-columns: minmax(320px, 420px) minmax(0, 1fr); }
    .recipe-card { grid-column: 1 / -1; position: static; }
}
@media (max-width: 980px) {
    .shell-top { grid-template-columns: 1fr; align-items: start; }
    .top-meta { justify-self: stretch; flex-wrap: wrap; }
    .top-actions { justify-content: flex-start; }
    .hero-grid, .command-layout, .history-hero { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: repeat(2,1fr); }
    .job-card { grid-template-columns: 1fr; }
    .job-meta { grid-template-columns: repeat(2, minmax(120px, 1fr)); }
    #canvas-container { min-height: 460px; height: 460px; }
}
@media (max-width: 640px) {
    .stage, .history-main { padding: 1rem; }
    .hero-copy, .hero-card, .rail, .recipe-card, .viewport-card { border-radius: 20px; }
    .param-grid, .stats, .gcode-actions, #gcodeButtons, .modal-actions { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: 1fr; }
    .brand-kicker, .top-meta { display: none; }
}