/* CaveCode Academy - Arduino+ Control Line Lab playable Chapter 1 */

.jsforge-academy {
    display: grid;
    grid-template-columns: 280px minmax(520px, 1fr) 370px;
    min-height: 100vh;
    color: var(--text);
    background: var(--bg);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.jsforge-academy * { box-sizing: border-box; }
.jsforge-academy button, .jsforge-academy textarea { font: inherit; }

.jsforge-sidebar {
    padding: 20px 14px;
    overflow-y: auto;
    background: var(--surface);
    border-right: 1px solid var(--border);
}
.jsforge-brand { display: flex; align-items: center; gap: 12px; padding: 4px 6px 18px; }
.jsforge-brand-mark {
    display: grid;
    width: 50px;
    height: 46px;
    place-items: center;
    color: var(--accent-contrast);
    background: var(--accent);
    border: 1px solid var(--accent-border);
    border-radius: 11px;
    box-shadow: 0 8px 22px var(--shadow);
    font-size: 13px;
    font-weight: 950;
}
.jsforge-brand h1 { margin: 0; font-size: 21px; }
.jsforge-brand p { margin: 3px 0 0; color: var(--text-muted); font-size: 12px; line-height: 1.4; }
.jsforge-course-nav { display: grid; margin: 0 0 14px; }

.jsforge-availability-note {
    padding: 13px;
    margin: 0 0 17px;
    color: var(--text);
    background: var(--accent-surface);
    border: 1px solid var(--accent-border);
    border-radius: 10px;
}
.jsforge-availability-note strong { color: var(--accent-soft); font-size: 10px; letter-spacing: .08em; }
.jsforge-availability-note p { margin: 6px 0 0; color: var(--text-muted); font-size: 11px; line-height: 1.5; }

.jsforge-lesson-list h2 {
    margin: 20px 8px 8px;
    color: var(--text-muted);
    font-size: 10px;
    letter-spacing: .75px;
    line-height: 1.35;
    text-transform: uppercase;
}
.jsforge-lesson-button {
    display: flex;
    width: 100%;
    align-items: center;
    gap: 10px;
    padding: 10px;
    margin-bottom: 6px;
    color: var(--text);
    text-align: left;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 9px;
    cursor: pointer;
}
.jsforge-lesson-button:hover:not(:disabled) { background: var(--surface-hover); }
.jsforge-lesson-button.active { background: var(--accent-surface); border-color: var(--accent-border); }
.jsforge-lesson-button.complete { color: var(--accent-soft); }
.jsforge-lesson-button:disabled { color: var(--text-dim); cursor: not-allowed; opacity: .62; }
.jsforge-lesson-number {
    display: grid;
    flex: 0 0 31px;
    height: 31px;
    place-items: center;
    color: var(--text-muted);
    background: var(--surface-strong);
    border-radius: 8px;
    font-size: 11px;
    font-weight: 850;
}
.jsforge-lesson-button.active .jsforge-lesson-number,
.jsforge-lesson-button.complete .jsforge-lesson-number {
    color: var(--accent-contrast);
    background: var(--accent);
}
.jsforge-lesson-copy { min-width: 0; }
.jsforge-lesson-copy strong, .jsforge-lesson-copy small { display: block; }
.jsforge-lesson-copy strong { overflow: hidden; font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.jsforge-lesson-copy small { margin-top: 3px; color: var(--text-muted); font-size: 10px; }

.jsforge-lesson-main { padding: 28px; overflow-y: auto; }
.jsforge-lesson-header {
    display: flex;
    max-width: 950px;
    justify-content: space-between;
    gap: 24px;
    margin: 0 auto;
}
.jsforge-lesson-header h2 { margin: 0 0 7px; font-size: 28px; }
.jsforge-lesson-header > div:first-child > p:last-child {
    max-width: 760px;
    margin: 0;
    color: var(--text-muted);
    line-height: 1.55;
}
.jsforge-academy .eyebrow {
    margin: 0 0 6px;
    color: var(--accent);
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 1px;
}
.jsforge-mastery-ring {
    display: grid;
    flex: 0 0 88px;
    height: 88px;
    place-items: center;
    align-content: center;
    text-align: center;
    background: var(--accent-surface);
    border: 2px solid var(--accent-border);
    border-radius: 50%;
}
.jsforge-mastery-ring strong { font-size: 18px; }
.jsforge-mastery-ring span { color: var(--text-muted); font-size: 10px; }

.jsforge-academy .stage-tabs {
    display: grid;
    grid-template-columns: repeat(8, minmax(70px, 1fr));
    max-width: 950px;
    margin: 23px auto 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 11px;
}
.jsforge-academy .stage-tab {
    min-height: 57px;
    padding: 8px 5px;
    color: var(--text-muted);
    background: var(--surface);
    border: 0;
    border-right: 1px solid var(--border);
    cursor: pointer;
    font-size: 11px;
}
.jsforge-academy .stage-tab:last-child { border-right: 0; }
.jsforge-academy .stage-tab span {
    display: grid;
    width: 21px;
    height: 21px;
    margin: 0 auto 4px;
    place-items: center;
    background: var(--surface-strong);
    border-radius: 50%;
    font-size: 10px;
}
.jsforge-academy .stage-tab.active { color: var(--text); background: var(--accent-surface); }
.jsforge-academy .stage-tab.active span,
.jsforge-academy .stage-tab.done span {
    color: var(--accent-contrast);
    background: var(--accent);
}
.jsforge-academy .stage-tab:disabled { opacity: .38; cursor: not-allowed; }

.jsforge-stage-card {
    max-width: 950px;
    min-height: 560px;
    padding: 23px;
    margin: 18px auto 0;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: 13px;
}
.jsforge-stage-heading {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}
.jsforge-stage-heading h3 { margin: 0; font-size: 21px; }
.jsforge-support-badge {
    padding: 7px 10px;
    color: var(--warning-text);
    background: var(--warning-surface);
    border: 1px solid var(--warning-border);
    border-radius: 99px;
    font-size: 10px;
    font-weight: 800;
}

.jsforge-learn-grid {
    display: grid;
    grid-template-columns: 1.25fr .75fr;
    gap: 18px;
    margin: 23px 0;
}
.jsforge-learn-grid h4,
.jsforge-exercise-intro h4,
.jsforge-prediction-card h4 {
    margin: 0 0 8px;
    font-size: 17px;
}
.jsforge-learn-grid p,
.jsforge-exercise-intro p,
.jsforge-prediction-card p {
    color: var(--text-muted);
    line-height: 1.6;
}
.jsforge-reference-example,
.jsforge-revealed-target {
    padding: 15px;
    margin: 16px 0;
    background: var(--code-bg);
    border: 1px solid var(--border-strong);
    border-radius: 9px;
}
.jsforge-reference-example > span,
.jsforge-revealed-target > span,
.jsforge-mini-label {
    color: var(--dark-panel-muted);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: .8px;
    text-transform: uppercase;
}
.jsforge-reference-example pre,
.jsforge-revealed-target pre {
    margin: 10px 0 0;
    overflow: auto;
    white-space: pre-wrap;
}
.jsforge-reference-example code,
.jsforge-revealed-target code {
    color: var(--code-text);
    font-family: Consolas, Monaco, monospace;
}
.jsforge-concept-points div { display: flex; gap: 9px; }
.jsforge-concept-points span { color: var(--accent); }
.jsforge-concept-points p { margin: 5px 0; }
.jsforge-memory-aid {
    padding: 18px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 11px;
}
.jsforge-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    margin: 20px 0;
}
.jsforge-flow div {
    padding: 11px 9px;
    background: var(--surface-soft);
    border-radius: 7px;
    font-size: 11px;
    font-weight: 800;
}
.jsforge-flow span { color: var(--accent); }

.jsforge-exercise-intro { margin: 22px 0 14px; }
.jsforge-compiler-note {
    padding: 13px 15px;
    margin-bottom: 13px;
    color: var(--warning-text);
    background: var(--warning-surface);
    border-left: 4px solid var(--warning-accent);
}
.jsforge-compiler-note p { margin: 5px 0 0; color: var(--warning-muted); }

.jsforge-typing-guide {
    margin-top: 14px;
    overflow: hidden;
    background: var(--code-bg);
    border: 1px solid var(--border-strong);
    border-radius: 10px;
}
.jsforge-editor-bar {
    display: flex;
    justify-content: space-between;
    padding: 9px 13px;
    color: var(--dark-panel-muted);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: .7px;
}
.jsforge-character-guide {
    min-height: 76px;
    padding: 18px;
    color: var(--code-text);
    white-space: pre-wrap;
    font: 18px/1.55 Consolas, Monaco, monospace;
}
.jsforge-character-correct { color: var(--accent); }
.jsforge-character-wrong {
    color: var(--danger);
    background: color-mix(in srgb, var(--danger) 16%, transparent);
    text-decoration: underline;
    text-decoration-thickness: 2px;
}
.jsforge-character-current {
    color: var(--code-text);
    background: var(--accent-border);
    animation: jsforge-cursor-pulse 1s infinite;
}
.jsforge-character-pending { color: var(--code-muted); }
.jsforge-space-mark { display: inline-block; min-width: .55em; }
.jsforge-newline-mark { color: var(--code-muted); font-size: 12px; }

.jsforge-academy .code-editor {
    margin-top: 14px;
    overflow: hidden;
    background: var(--code-bg);
    border: 1px solid var(--border-strong);
    border-radius: 10px;
}
.jsforge-academy .code-editor .editor-bar {
    display: flex;
    justify-content: space-between;
    padding: 9px 13px;
    color: var(--dark-panel-muted);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: .7px;
}
.jsforge-academy .code-editor textarea {
    display: block;
    width: 100%;
    min-height: 160px;
    resize: vertical;
    padding: 18px;
    color: var(--code-text);
    background: var(--code-bg);
    border: 0;
    outline: none;
    font: 17px/1.55 Consolas, Monaco, monospace;
}
.jsforge-academy .typing-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--border-strong);
}
.jsforge-academy .typing-stats div {
    padding: 9px 12px;
    border-right: 1px solid var(--border-strong);
}
.jsforge-academy .typing-stats div:last-child { border-right: 0; }
.jsforge-academy .typing-stats span,
.jsforge-academy .typing-stats strong {
    display: block;
}
.jsforge-academy .typing-stats span {
    color: var(--code-muted);
    font-size: 8px;
    text-transform: uppercase;
}
.jsforge-academy .typing-stats strong {
    margin-top: 3px;
    color: var(--code-text);
    font-size: 11px;
}

.jsforge-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 13px;
}
.jsforge-primary,
.jsforge-secondary {
    padding: 10px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 850;
}
.jsforge-primary {
    color: var(--accent-contrast);
    background: var(--accent);
    border: 1px solid var(--accent);
}
.jsforge-secondary {
    color: var(--text);
    background: var(--surface-raised);
    border: 1px solid var(--border);
}
.jsforge-continue-button { margin-top: 12px; }

.jsforge-feedback {
    padding: 13px 15px;
    margin-top: 13px;
    border-radius: 9px;
    line-height: 1.5;
}
.jsforge-feedback.success {
    color: var(--accent-soft);
    background: var(--accent-surface);
    border: 1px solid var(--accent-border);
}
.jsforge-feedback.error {
    color: var(--danger-text);
    background: var(--danger-surface);
    border: 1px solid var(--danger-border);
}

.jsforge-prediction-card { margin: 22px 0; }
.jsforge-prediction-options {
    display: grid;
    gap: 9px;
    margin: 15px 0;
}
.jsforge-prediction-options button {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px;
    color: var(--text);
    text-align: left;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 9px;
    cursor: pointer;
}
.jsforge-prediction-options button span {
    display: grid;
    width: 25px;
    height: 25px;
    place-items: center;
    color: var(--text-muted);
    background: var(--surface-strong);
    border-radius: 6px;
}
.jsforge-prediction-options button.correct {
    color: var(--accent-soft);
    border-color: var(--accent-border);
    background: var(--accent-surface);
}
.jsforge-prediction-options button.wrong {
    color: var(--danger-text);
    border-color: var(--danger-border);
    background: var(--danger-surface);
}

.jsforge-completion-panel {
    max-width: 720px;
    margin: 36px auto;
    text-align: center;
}
.jsforge-completion-icon {
    display: grid;
    width: 72px;
    height: 72px;
    margin: 0 auto 16px;
    place-items: center;
    color: var(--accent-contrast);
    background: var(--accent);
    border-radius: 50%;
    font-size: 31px;
    font-weight: 950;
}
.jsforge-completion-panel > p {
    color: var(--text-muted);
    line-height: 1.65;
}
.jsforge-completion-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 20px 0;
}
.jsforge-completion-summary div {
    padding: 13px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 9px;
}
.jsforge-completion-summary span,
.jsforge-completion-summary strong,
.jsforge-completion-summary code {
    display: block;
}
.jsforge-completion-summary span {
    color: var(--text-muted);
    font-size: 9px;
    text-transform: uppercase;
}
.jsforge-completion-summary strong,
.jsforge-completion-summary code {
    margin-top: 6px;
    overflow-wrap: anywhere;
    color: var(--text);
    font-size: 11px;
}

.jsforge-preview-panel {
    padding: 22px;
    overflow-y: auto;
    background: var(--surface);
    border-left: 1px solid var(--border);
}
.jsforge-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.jsforge-preview-header h2 { margin: 0; font-size: 22px; }
.jsforge-live {
    padding: 6px 9px;
    color: var(--accent-contrast);
    background: var(--accent);
    border-radius: 99px;
    font-size: 9px;
    font-weight: 900;
    letter-spacing: .08em;
}

.jsforge-foundry-scene {
    position: relative;
    min-height: 410px;
    margin-top: 18px;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 39%, var(--accent-surface), transparent 32%),
        linear-gradient(180deg, var(--code-bg), var(--bg-deep));
    border: 1px solid var(--border-strong);
    border-radius: 13px;
    box-shadow: inset 0 0 45px rgb(0 0 0 / 35%);
}
.jsforge-grid-floor {
    position: absolute;
    inset: 0;
    height: 55%;
    overflow: hidden;
    background-image:
        linear-gradient(var(--accent-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--accent-border) 1px, transparent 1px);
    background-size: 28px 28px;
    opacity: .32;
    transform: perspective(200px) rotateX(56deg);
    transform-origin: center top;
    pointer-events: none;
}
.jsforge-engine-core {
    position: absolute;
    top: 92px;
    left: 50%;
    width: 140px;
    height: 140px;
    opacity: .28;
    filter: grayscale(1);
    transform: translateX(-50%);
    transition: opacity .25s ease, filter .25s ease;
}
.jsforge-engine-core.active {
    opacity: 1;
    filter: none;
}
.jsforge-core-ring {
    position: absolute;
    inset: 0;
    border: 7px solid var(--accent-border);
    border-radius: 50%;
}
.jsforge-core-ring--outer {
    box-shadow:
        0 0 22px var(--accent-border),
        inset 0 0 22px var(--accent-border);
    animation: jsforge-core-spin 13s linear infinite;
}
.jsforge-core-ring--middle {
    inset: 27px;
    border-width: 3px;
    border-style: dashed;
    animation: jsforge-core-spin-reverse 9s linear infinite;
}
.jsforge-core-center {
    position: absolute;
    inset: 44px;
    display: grid;
    place-items: center;
    color: var(--accent-contrast);
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 28px var(--accent-border);
    font-size: 17px;
    font-weight: 950;
}
.jsforge-foundry-system {
    position: absolute;
    display: grid;
    width: 78px;
    min-height: 50px;
    place-items: center;
    align-content: center;
    padding: 7px;
    color: var(--code-muted);
    background: rgb(0 0 0 / 28%);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    opacity: .38;
    transition: .25s ease;
}
.jsforge-foundry-system.active {
    color: var(--accent-soft);
    background: var(--accent-surface);
    border-color: var(--accent-border);
    box-shadow: 0 0 16px var(--accent-border);
    opacity: 1;
}
.jsforge-foundry-system span {
    font-size: 7px;
    font-weight: 900;
    letter-spacing: .09em;
}
.jsforge-foundry-system strong {
    max-width: 100%;
    margin-top: 4px;
    overflow: hidden;
    font-size: 10px;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.jsforge-foundry-system--messages { top: 24px; left: 20px; }
.jsforge-foundry-system--thermal { top: 24px; right: 20px; }
.jsforge-foundry-system--instruments { top: 105px; left: 18px; }
.jsforge-foundry-system--labels { top: 105px; right: 18px; }
.jsforge-foundry-system--input { bottom: 96px; left: 28px; }
.jsforge-foundry-system--power { right: 28px; bottom: 96px; }
.jsforge-foundry-system--dashboard {
    right: 50%;
    bottom: 27px;
    width: 120px;
    transform: translateX(50%);
}

.jsforge-preview-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 13px;
}
.jsforge-preview-stats div {
    padding: 10px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 8px;
}
.jsforge-preview-stats span,
.jsforge-preview-stats strong {
    display: block;
}
.jsforge-preview-stats span {
    color: var(--text-muted);
    font-size: 9px;
    text-transform: uppercase;
}
.jsforge-preview-stats strong {
    margin-top: 4px;
    overflow: hidden;
    font-size: 11px;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.jsforge-load-track {
    height: 8px;
    margin: 13px 0;
    overflow: hidden;
    background: var(--surface-strong);
    border-radius: 99px;
}
.jsforge-load-fill {
    height: 100%;
    background: var(--accent);
    transition: width .25s ease;
}

.jsforge-terminal {
    padding: 14px;
    color: var(--dark-panel-text);
    background: var(--code-bg);
    border: 1px solid var(--border-strong);
    border-radius: 9px;
    font: 10px/1.55 Consolas, Monaco, monospace;
}
.jsforge-terminal-title {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    padding-bottom: 8px;
    margin-bottom: 8px;
    color: var(--dark-panel-muted);
    border-bottom: 1px solid var(--border-strong);
    font-size: 8px;
    font-weight: 900;
    letter-spacing: .08em;
}
.jsforge-terminal p { margin: 4px 0; }

.jsforge-xp-award-toast {
    position: fixed;
    z-index: 1200;
    right: 18px;
    bottom: 18px;
    display: grid;
    min-width: 230px;
    gap: 4px;
    padding: 15px;
    color: var(--accent-contrast);
    text-align: left;
    background: var(--accent);
    border: 1px solid var(--accent-border);
    border-radius: 13px;
    box-shadow: 0 20px 65px var(--shadow);
    cursor: pointer;
}
.jsforge-xp-award-toast span,
.jsforge-xp-award-toast small {
    font-size: 9px;
}
.jsforge-xp-award-toast strong { font-size: 20px; }

.jsforge-achievement-overlay,
.jsforge-save-progress-overlay {
    position: fixed;
    z-index: 1300;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 22px;
    background: rgb(3 8 13 / 78%);
    backdrop-filter: blur(8px);
}
.jsforge-achievement-dialog,
.jsforge-save-progress-dialog {
    width: min(500px, 100%);
    padding: 28px;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--accent-border);
    border-radius: 18px;
    box-shadow: 0 28px 90px var(--shadow);
    text-align: center;
}
.jsforge-achievement-kicker,
.jsforge-save-progress-kicker {
    color: var(--accent);
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 1.2px;
}
.jsforge-achievement-medal {
    display: grid;
    width: 76px;
    height: 76px;
    margin: 17px auto;
    place-items: center;
    color: var(--accent-contrast);
    background: var(--accent);
    border-radius: 50%;
    font-weight: 950;
}
.jsforge-achievement-dialog h2,
.jsforge-save-progress-dialog h2 {
    margin: 8px 0 10px;
}
.jsforge-achievement-dialog > p,
.jsforge-save-progress-dialog > p {
    color: var(--text-muted);
    line-height: 1.65;
}
.jsforge-achievement-rewards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 9px;
    margin-top: 17px;
}
.jsforge-achievement-rewards div {
    padding: 12px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 9px;
}
.jsforge-achievement-rewards span,
.jsforge-achievement-rewards strong {
    display: block;
}
.jsforge-achievement-rewards span {
    color: var(--text-muted);
    font-size: 8px;
}
.jsforge-achievement-rewards strong {
    margin-top: 5px;
    color: var(--accent-soft);
    font-size: 12px;
}
.jsforge-achievement-dialog > small,
.jsforge-save-progress-dialog > small {
    display: block;
    margin-top: 14px;
    color: var(--text-muted);
    font-size: 9px;
}
.jsforge-achievement-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 9px;
    margin-top: 17px;
}
.jsforge-achievement-actions a,
.jsforge-achievement-actions button,
.jsforge-continue-guest {
    display: grid;
    min-height: 42px;
    place-items: center;
    border-radius: 9px;
    font-size: 10px;
    font-weight: 900;
    text-decoration: none;
    cursor: pointer;
}
.jsforge-achievement-actions a {
    color: var(--accent-contrast);
    background: var(--accent);
    border: 1px solid var(--accent);
}
.jsforge-achievement-actions button,
.jsforge-continue-guest {
    color: var(--text);
    background: var(--surface-raised);
    border: 1px solid var(--border);
}
.jsforge-continue-guest {
    width: 100%;
    padding: 11px 13px;
}

.path-card.preview,
.path-card.available {
    border-color: var(--accent-border);
}
.path-card .preview-status {
    color: var(--warning-text);
    background: var(--warning-surface);
    border-color: var(--warning-border);
}

@keyframes jsforge-core-spin {
    to { transform: rotate(360deg); }
}
@keyframes jsforge-core-spin-reverse {
    to { transform: rotate(-360deg); }
}
@keyframes jsforge-cursor-pulse {
    50% { opacity: .45; }
}

@media (prefers-reduced-motion: reduce) {
    .jsforge-core-ring,
    .jsforge-character-current {
        animation: none;
    }
}

@media (max-width: 1250px) {
    .jsforge-academy {
        grid-template-columns: 250px minmax(480px, 1fr);
    }

    .jsforge-preview-panel {
        grid-column: 1 / -1;
        border-top: 1px solid var(--border);
        border-left: 0;
    }
}

@media (max-width: 820px) {
    .jsforge-academy { display: block; }

    .jsforge-sidebar,
    .jsforge-preview-panel {
        overflow: visible;
        border: 0;
        border-bottom: 1px solid var(--border);
    }

    .jsforge-lesson-main { padding: 20px 14px; }

    .jsforge-lesson-header,
    .jsforge-stage-heading {
        display: grid;
    }

    .jsforge-learn-grid,
    .jsforge-completion-summary {
        grid-template-columns: 1fr;
    }

    .jsforge-academy .stage-tabs {
        overflow-x: auto;
    }
}

@media (max-width: 560px) {
    .jsforge-achievement-rewards,
    .jsforge-achievement-actions,
    .jsforge-preview-stats {
        grid-template-columns: 1fr;
    }
}


/* Arduino maker lab preview — calm board + breadboard (no tron floor) */
.jsforge-lab-scene {
    position: relative;
    min-height: 380px;
    margin-top: 18px;
    padding: 18px;
    overflow: hidden;
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: 13px;
    display: grid;
    gap: 14px;
    align-content: start;
}
.jsforge-board {
    position: relative;
    height: 120px;
    border-radius: 10px;
    background: #2b4c7e;
    border: 1px solid color-mix(in srgb, #0d3d2a 40%, var(--border));
    opacity: .55;
    transition: opacity .25s ease, box-shadow .25s ease;
}
.jsforge-board.powered {
    opacity: 1;
    box-shadow: inset 0 0 0 1px color-mix(in srgb, #7dffb2 25%, transparent);
}
.jsforge-board-label {
    position: absolute;
    top: 10px;
    left: 12px;
    color: #dfffea;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: .08em;
}
.jsforge-usb {
    position: absolute;
    left: 50%;
    bottom: -4px;
    width: 48px;
    height: 10px;
    transform: translateX(-50%);
    background: #2a2a2a;
    border-radius: 2px;
}
.jsforge-mcu {
    position: absolute;
    top: 40px;
    left: 50%;
    width: 54px;
    height: 54px;
    transform: translateX(-50%);
    display: grid;
    place-items: center;
    background: #111;
    color: #9ad;
    border-radius: 6px;
    font-size: 10px;
    font-weight: 800;
}
.jsforge-pins {
    position: absolute;
    right: 10px;
    top: 16px;
    display: grid;
    gap: 4px;
}
.jsforge-pins span {
    min-width: 28px;
    padding: 2px 6px;
    text-align: center;
    border-radius: 4px;
    background: #0f0f0f;
    color: #aaa;
    font-size: 10px;
    font-weight: 700;
}
.jsforge-pins span.active {
    color: #041;
    background: #7dffb2;
}
.jsforge-breadboard {
    position: relative;
    height: 90px;
    border-radius: 8px;
    background:
        repeating-linear-gradient(
            90deg,
            #d8d2c4 0 10px,
            #cfc8b8 10px 12px
        );
    border: 1px solid var(--border);
}
.jsforge-led {
    position: absolute;
    left: 28px;
    top: 28px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #5a5a5a;
    box-shadow: inset 0 0 4px #0008;
    transition: background .2s ease, box-shadow .2s ease;
}
.jsforge-led.on {
    background: #ff4d4d;
    box-shadow: 0 0 12px #ff4d4d99;
}
.jsforge-led.blink {
    animation: jsforge-led-blink 1s step-end infinite;
}
.jsforge-resistor {
    position: absolute;
    left: 56px;
    top: 34px;
    width: 36px;
    height: 10px;
    border-radius: 2px;
    background: linear-gradient(90deg, #c4a574, #e8d2a8, #c4a574);
}
.jsforge-rail {
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 10px;
    height: 4px;
    border-radius: 2px;
    background: #c0392b55;
}
.jsforge-sensor {
    position: absolute;
    right: 16px;
    top: 20px;
    min-width: 54px;
    padding: 6px 8px;
    border-radius: 6px;
    background: #eee;
    color: #333;
    opacity: .35;
    font-size: 10px;
    text-align: center;
}
.jsforge-sensor.active { opacity: 1; }
.jsforge-sensor strong { display: block; font-size: 12px; }
.jsforge-readout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}
.jsforge-readout div {
    padding: 8px;
    border-radius: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
}
.jsforge-readout span {
    display: block;
    color: var(--text-muted);
    font-size: 10px;
}
.jsforge-readout strong { font-size: 13px; }
@keyframes jsforge-led-blink {
    50% { background: #5a5a5a; box-shadow: none; }
}
@media (prefers-reduced-motion: reduce) {
    .jsforge-led.blink { animation: none; }
}


/* Web Forge browser/console preview (not Arduino board) */
.jsforge-browser-frame {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    overflow: hidden;
    min-height: 180px;
}
.jsforge-browser-frame.powered {
    border-color: var(--accent-border);
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}
.jsforge-browser-chrome {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    background: var(--surface-strong);
    border-bottom: 1px solid var(--border);
}
.jsforge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    opacity: 0.5;
}
.jsforge-browser-url {
    margin-left: 8px;
    padding: 2px 8px;
    border-radius: 6px;
    background: var(--surface);
    color: var(--text-muted);
    font-size: 11px;
}
.jsforge-browser-stage {
    padding: 18px 14px;
    display: grid;
    gap: 12px;
    justify-items: start;
}
.jsforge-hud-title {
    font-weight: 850;
    font-size: 14px;
}
.jsforge-hud-btn {
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface-raised);
    color: var(--text);
    font-weight: 800;
}
.jsforge-hud-btn.active {
    background: var(--accent);
    color: var(--accent-contrast);
    border-color: var(--accent);
}
.jsforge-hud-status {
    padding: 8px 10px;
    border-radius: 8px;
    background: var(--surface-soft);
    border: 1px solid var(--border);
    font-family: Consolas, Monaco, monospace;
    font-size: 12px;
    min-width: 120px;
}
.jsforge-hud-status.lit {
    border-color: var(--accent-border);
    color: var(--accent-soft);
}
.jsforge-console-pane {
    margin-top: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--code-bg);
    overflow: hidden;
}
.jsforge-console-label {
    padding: 6px 10px;
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}
.jsforge-console-out {
    margin: 0;
    padding: 12px;
    color: var(--accent-soft);
    font: 12px/1.6 Consolas, Monaco, monospace;
    white-space: pre-wrap;
}
/* hide leftover hardware pieces if any */
.jsforge-board, .jsforge-breadboard, .jsforge-led, .jsforge-pins, .jsforge-usb {
    display: none !important;
}