/* ═══ Learn — BXF curriculum (v2) ═══════════════════════════════════════ */

.learn-container {
    max-width: 920px;
    margin: 0 auto;
    padding: 28px 20px 80px;
}

/* ── Hero (alineado con tokens BXF / shell) ── */
.learn-hero {
    margin-bottom: 28px;
    padding: 32px 36px;
    border-radius: var(--bxf-radius-lg, 12px);
    background: linear-gradient(155deg, rgba(203, 166, 247, 0.06), var(--bxf-surface-strong, rgba(18, 18, 18, 0.88)));
    border: 1px solid var(--border-dim, rgba(255, 255, 255, 0.06));
    box-shadow: var(--bxf-shadow-inset, inset 0 1px 0 rgba(255, 255, 255, 0.04)), 0 20px 48px rgba(0, 0, 0, 0.35);
}

.learn-kicker {
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--bxf-mauve, #cba6f7);
    margin: 0 0 10px;
    font-weight: 600;
}

.learn-title {
    font-family: var(--font-display, var(--font-heading, monospace));
    font-size: clamp(1.85rem, 4vw, 2.45rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 12px;
    color: var(--text-main, #e8e8ef);
    line-height: 1.15;
}

.learn-lead {
    font-size: 1.02rem;
    line-height: 1.65;
    color: var(--text-muted, #a6adc8);
    max-width: 52ch;
    margin: 0 0 20px;
}

.learn-tips {
    margin: 0;
    padding: 0 0 0 1.1rem;
    color: var(--text-muted, #9399b2);
    font-size: 0.88rem;
    line-height: 1.55;
    max-width: 56ch;
}

.learn-tips li {
    margin-bottom: 8px;
}

.learn-tips li:last-child {
    margin-bottom: 0;
}

.learn-stats {
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.learn-stats__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 6px 10px;
    font-size: 0.95rem;
}

.learn-stats__num {
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--bxf-green, #a6e3a1);
    font-variant-numeric: tabular-nums;
}

.learn-stats__sep {
    color: rgba(255, 255, 255, 0.25);
    font-weight: 300;
}

.learn-stats__tot {
    font-weight: 600;
    color: var(--text-main, #cdd6f4);
    font-variant-numeric: tabular-nums;
}

.learn-stats__label {
    flex: 1 1 100%;
    font-size: 0.82rem;
    color: var(--text-muted, #a6adc8);
    margin-top: 2px;
}

@media (min-width: 560px) {
    .learn-stats__label {
        flex: 0 1 auto;
        margin-top: 0;
        margin-left: 8px;
    }
}

/* ── Toolbar: tabs + search ── */
.learn-toolbar {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

@media (min-width: 640px) {
    .learn-toolbar {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
    }
}

.learn-tabs {
    display: inline-flex;
    padding: 4px;
    border-radius: 14px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.learn-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--text-muted, #a6adc8);
    font-family: var(--font-display, var(--font-body, monospace));
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.learn-tab:hover {
    color: var(--text-main, #cdd6f4);
}

.learn-tab.is-active {
    background: rgba(203, 166, 247, 0.12);
    color: var(--text-main, #e8e8ef);
    box-shadow: 0 0 0 1px rgba(203, 166, 247, 0.2);
}

.learn-tab__icon {
    font-size: 1.1rem;
    opacity: 0.9;
}

.learn-tab__count {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--bxf-teal, #94e2d5);
    font-variant-numeric: tabular-nums;
}

.learn-search-wrap {
    flex: 1;
    max-width: 320px;
}

.learn-search-input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.4);
    color: var(--text-main, #cdd6f4);
    font-size: 0.88rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.learn-search-input::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.learn-search-input:focus {
    border-color: rgba(137, 220, 235, 0.45);
    box-shadow: 0 0 0 3px rgba(137, 220, 235, 0.12);
}

/* ── Tracks ── */
.learn-tracks {
    position: relative;
}

.learn-track {
    border-radius: 22px;
    padding: 8px 8px 20px;
}

.learn-track[hidden] {
    display: none !important;
}

.path-card--linux {
    border: 1px solid var(--border-glow, rgba(203, 166, 247, 0.14));
    background: var(--bxf-surface-strong, rgba(18, 18, 18, 0.88));
    box-shadow: var(--bxf-shadow-elevated, 0 20px 50px rgba(0, 0, 0, 0.4));
}

.path-card--bash {
    border: 1px solid rgba(137, 220, 235, 0.12);
    background: var(--bxf-surface-strong, rgba(18, 18, 18, 0.88));
    box-shadow: var(--bxf-shadow-elevated, 0 20px 50px rgba(0, 0, 0, 0.4));
}

/* ── Linux: level rail + single grid (no tall stacked sections) ── */
.learn-linux-head {
    padding: 4px 12px 16px;
}

.learn-linux-lead {
    margin: 0 0 14px;
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--text-muted, #a6adc8);
    max-width: 62ch;
}

/* Rail de niveles: sin barra de scroll visible + flechas */
.learn-level-rail-wrap {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: stretch;
    gap: 6px;
    margin-bottom: 8px;
    min-width: 0;
}

.learn-rail-nudge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    min-height: 42px;
    padding: 0;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.45);
    color: var(--bxf-cyan, #89dceb);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition: background 0.18s, border-color 0.18s;
    flex-shrink: 0;
}

.learn-rail-nudge:hover {
    background: rgba(137, 220, 235, 0.08);
    border-color: rgba(137, 220, 235, 0.35);
}

.path-card--linux .learn-rail-nudge {
    color: var(--bxf-mauve, #cba6f7);
}

.path-card--linux .learn-rail-nudge:hover {
    background: rgba(203, 166, 247, 0.08);
    border-color: rgba(203, 166, 247, 0.35);
}

.learn-level-rail {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 4px 2px 6px;
    margin: 0;
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
    mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
    -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 12px, #000 calc(100% - 12px), transparent 100%);
}

.learn-level-rail::-webkit-scrollbar {
    display: none;
}

@media (max-width: 520px) {
    .learn-level-rail-wrap {
        display: block;
    }

    .learn-rail-nudge {
        display: none;
    }

    .learn-level-rail {
        flex-wrap: wrap;
        justify-content: center;
        overflow-x: visible;
        mask-image: none;
        -webkit-mask-image: none;
    }
}

.learn-level-pill {
    flex: 0 0 auto;
    padding: 9px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.35);
    color: var(--text-muted, #a6adc8);
    font-size: 0.82rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    cursor: pointer;
    transition: background 0.18s, color 0.18s, border-color 0.18s, box-shadow 0.18s;
    white-space: nowrap;
}

.learn-level-pill:hover {
    color: var(--text-main, #e8e8ef);
    border-color: rgba(203, 166, 247, 0.35);
}

.learn-level-pill.is-active {
    background: rgba(203, 166, 247, 0.14);
    color: var(--text-main, #f5e0ff);
    border-color: rgba(203, 166, 247, 0.45);
    box-shadow: 0 0 0 1px rgba(203, 166, 247, 0.15);
}

.learn-level-pill:focus-visible {
    outline: 2px solid rgba(137, 220, 235, 0.55);
    outline-offset: 2px;
}

.learn-level-caption {
    margin: 0;
    min-height: 1.35em;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.42);
}

/* Vista por páginas: sin panel con scroll infinito */
.learn-page-wrap {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 0 4px;
}

.learn-page-grid {
    padding: 0 2px;
}

.module-list--linux,
.module-list--bash {
    padding-bottom: 8px;
}

/* Paginador Learn (también .ctf-pager en experience.css) */
.learn-pager {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    padding: 14px 18px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.38);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.path-card--bash .learn-pager {
    border-color: rgba(137, 220, 235, 0.12);
    background: rgba(137, 220, 235, 0.04);
}

.learn-pager__btn {
    min-width: 44px;
    min-height: 44px;
    padding: 0 16px;
    border-radius: 12px;
    border: 1px solid rgba(203, 166, 247, 0.35);
    background: rgba(203, 166, 247, 0.1);
    color: #f0e6ff;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.18s, transform 0.15s;
}

.path-card--bash .learn-pager__btn {
    border-color: rgba(137, 220, 235, 0.35);
    background: rgba(137, 220, 235, 0.08);
    color: #d8f7f3;
}

.learn-pager__btn:hover:not(:disabled) {
    transform: translateY(-1px);
    background: rgba(203, 166, 247, 0.18);
}

.learn-pager__btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.learn-pager__meta {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted, #a6adc8);
    font-variant-numeric: tabular-nums;
    text-align: center;
    min-width: min(100%, 280px);
}

.level-separator {
    position: sticky;
    top: 0;
    z-index: 2;
    margin: 18px 12px 12px;
    padding: 11px 16px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #bac2de;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(12px);
}

.level-separator--bash {
    color: #89dceb;
    border-color: rgba(137, 220, 235, 0.15);
    background: rgba(137, 220, 235, 0.05);
}

.module-list {
    display: grid;
    gap: 10px;
    padding: 0 8px;
}

.module-item {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    padding: 16px 18px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.35);
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s, background 0.18s, box-shadow 0.18s;
    text-align: left;
}

.module-item:hover {
    transform: translateY(-1px);
    border-color: rgba(203, 166, 247, 0.28);
    background: rgba(203, 166, 247, 0.06);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.path-card--bash .module-item:hover {
    border-color: rgba(137, 220, 235, 0.3);
    background: rgba(137, 220, 235, 0.06);
}

.module-item:focus-visible {
    outline: 2px solid rgba(137, 220, 235, 0.6);
    outline-offset: 2px;
}

.module-info {
    display: grid;
    gap: 4px;
    min-width: 0;
}

.module-lesson {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.38);
    font-variant-numeric: tabular-nums;
}

.module-name {
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--text-main, #e8e8ef);
    line-height: 1.3;
}

.module-meta {
    font-size: 0.8rem;
    color: var(--text-muted, #9399b2);
}

.module-status {
    flex-shrink: 0;
    width: 11px;
    height: 11px;
    margin-top: 6px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: transparent;
    transition: background 0.2s, border-color 0.2s;
}

.module-item[data-status="done"] .module-status {
    background: var(--bxf-green, #a6e3a1);
    border-color: var(--bxf-green, #a6e3a1);
    box-shadow: 0 0 12px rgba(166, 227, 161, 0.45);
}

.module-item[data-status="done"] {
    border-color: rgba(166, 227, 161, 0.2);
}

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

/* ═══ Practice overlay (ITE) ═══════════════════════════════════════════ */
.ite-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 10000;
    flex-direction: column;
    flex-wrap: nowrap;
    background: #0c0c10;
}

.ite-header {
    flex-shrink: 0;
    min-height: 56px;
    padding: 0 12px 0 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(17, 17, 27, 0.96);
    backdrop-filter: blur(14px);
}

.ite-header__left {
    display: flex;
    align-items: center;
    gap: 4px;
    min-width: 0;
    flex: 1;
}

.ite-back {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 12px;
    background: transparent;
    color: var(--text-muted, #a6adc8);
    font-size: 1.2rem;
    cursor: pointer;
    line-height: 1;
    transition: background 0.2s, color 0.2s;
}

.ite-back:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main, #cdd6f4);
}

.ite-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    flex-wrap: wrap;
}

.ite-breadcrumb__muted {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.35);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.ite-breadcrumb__track {
    font-size: 0.75rem;
    font-weight: 600;
    color: #89b4fa;
}

.ite-breadcrumb__sep {
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.75rem;
}

.ite-title {
    margin: 0;
    font-size: clamp(0.95rem, 2.5vw, 1.05rem);
    font-weight: 600;
    color: var(--text-main, #e8e8ef);
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.ite-controls {
    display: flex;
    flex-shrink: 0;
    gap: 8px;
    align-items: center;
}

.ite-action {
    padding: 10px 16px;
    border-radius: 12px;
    border: 1px solid rgba(166, 227, 161, 0.35);
    background: rgba(166, 227, 161, 0.1);
    color: #c8f5c0;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body, sans-serif);
    transition: background 0.2s, border-color 0.2s;
}

.ite-action:hover {
    background: rgba(166, 227, 161, 0.18);
    border-color: rgba(166, 227, 161, 0.55);
}

.ite-close {
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-muted, #bac2de);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body, sans-serif);
}

.ite-close:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-main, #e8e8ef);
}

.ite-body {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(300px, 380px) 1fr;
    overflow: hidden;
    min-height: 0;
}

@media (max-width: 1024px) {
    .ite-body {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }
}

.pane-instructions {
    overflow-y: auto;
    padding: 22px 24px 32px;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    background: linear-gradient(180deg, rgba(24, 24, 37, 0.5), rgba(17, 17, 27, 0.92));
}

@media (max-width: 1024px) {
    .pane-instructions {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        max-height: 42vh;
    }
}

.instruction-section {
    margin-bottom: 22px;
}

.instruction-section:last-child {
    margin-bottom: 0;
}

.instruction-heading {
    margin: 0 0 8px;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #cba6f7;
}

.instruction-text.prose {
    font-size: 0.92rem;
    line-height: 1.65;
    color: #bac2de;
    font-family: var(--font-body, sans-serif);
}

.instruction-objective {
    padding: 12px 14px;
    border-radius: 12px;
    border-left: 3px solid #89dceb;
    background: rgba(137, 220, 235, 0.06);
    color: #e8e8ef !important;
}

.exercise-steps {
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: step;
}

.exercise-steps li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.exercise-steps li:last-child {
    border-bottom: none;
}

.step-index {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 0.72rem;
    font-weight: 800;
    background: rgba(203, 166, 247, 0.12);
    color: #cba6f7;
}

.step-code {
    flex: 1;
    min-width: 0;
    display: block;
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.07);
    font-family: var(--font-mono, 'Share Tech Mono', monospace);
    font-size: 0.78rem;
    line-height: 1.45;
    color: #a6e3a1;
    white-space: pre-wrap;
    word-break: break-word;
}

.scratch-hint {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.38);
    margin: 0 0 8px;
}

.scratchpad {
    width: 100%;
    min-height: 120px;
    resize: vertical;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.35);
    color: var(--text-main, #cdd6f4);
    font-family: var(--font-mono, monospace);
    font-size: 0.82rem;
    line-height: 1.5;
}

.scratchpad:focus {
    outline: none;
    border-color: rgba(203, 166, 247, 0.35);
    box-shadow: 0 0 0 3px rgba(203, 166, 247, 0.1);
}

.save-status {
    margin-top: 8px;
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.35);
}

.pane-terminal {
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: #000;
}

.pane-terminal__bar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    background: #11111b;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.pane-terminal__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #a6e3a1;
    box-shadow: 0 0 8px rgba(166, 227, 161, 0.5);
}

.pane-terminal__label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #89b4fa;
}

.pane-terminal__hint {
    margin-left: auto;
    font-size: 0.68rem;
    color: rgba(255, 255, 255, 0.32);
}

#terminal-iframe {
    flex: 1;
    width: 100%;
    min-height: 320px;
    border: none;
}

@media (min-width: 1025px) {
    #terminal-iframe {
        min-height: 0;
    }
}

/* Aviso: practicar en SO propio / VM */
.terminal-os-notice {
  flex-shrink: 0;
  margin: 0;
  padding: 5px 10px;
  min-height: 24px;
  font-size: 0.62rem;
  line-height: 1.2;
  color: rgba(205, 214, 244, 0.72);
  background: rgba(137, 180, 250, 0.06);
  border-bottom: 1px solid rgba(137, 220, 235, 0.18);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 1024px) {
  .terminal-os-notice {
    font-size: 0.58rem;
    padding: 4px 8px;
  }
}

/* Practice column: Linux = solo terminal; Bash = editor | terminal (grid) */
.ite-practice-column {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    background: #0a0a0f;
}

/* Linux: columna derecha = únicamente iframe de terminal (sin barra decorativa) */
.ite-practice-column--linux {
    flex: 1;
    min-height: 0;
}

.ite-practice-column--linux .pane-terminal {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: #000;
}

.ite-practice-column--linux .pane-terminal__bar {
    display: none;
}

.ite-practice-column--linux #terminal-iframe {
    flex: 1;
    min-height: 0;
    width: 100%;
}

/* Bash: editor y terminal a la par en escritorio; apilados en móvil con terminal grande */
.ite-practice-column--bash {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr);
    align-items: stretch;
    gap: 0;
    min-height: 0;
}

@media (max-width: 1024px) {
    .ite-practice-column--bash {
        grid-template-columns: 1fr;
        grid-template-rows: minmax(200px, 40vh) minmax(280px, 1fr);
    }
}

/* display:flex aquí anulaba el atributo HTML hidden — en Linux el panel seguía visible */
.bash-learn-panel[hidden] {
    display: none !important;
}

.bash-learn-panel {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 0;
    padding: 16px 18px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    background: linear-gradient(180deg, rgba(24, 24, 37, 0.65), rgba(12, 12, 18, 0.98));
}

/* Linux: solo consola; el editor de scripts Bash no aplica y no debe reservar espacio */
.ite-practice-column--linux .bash-learn-panel {
    display: none !important;
}

/* En Bash el aviso estorba y no aporta contexto útil */
.ite-practice-column--bash .terminal-os-notice {
    display: none !important;
}

.ite-practice-column--bash .bash-learn-panel {
    height: 100%;
    max-height: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

@media (min-width: 1025px) {
    .ite-practice-column--bash .bash-learn-panel {
        border-bottom: none;
        border-right: 1px solid rgba(255, 255, 255, 0.08);
    }
}

.bash-learn-panel__intro {
    flex-shrink: 0;
}

.bash-learn-panel__title {
    margin: 0 0 6px;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #cba6f7;
}

.bash-learn-panel__lead {
    margin: 0;
    font-size: 0.84rem;
    line-height: 1.55;
    color: rgba(186, 194, 222, 0.88);
    max-width: 62ch;
}

.bash-editor-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
}

.bash-editor-cwd {
    color: #89dceb;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.bash-script-editor {
    flex: 1 1 auto;
    width: 100%;
    min-height: 160px;
    resize: vertical;
    padding: 14px 16px;
    border-radius: 12px;
    border: 1px solid rgba(137, 220, 235, 0.2);
    background: rgba(0, 0, 0, 0.55);
    color: #a6e3a1;
    font-family: var(--font-mono, 'Share Tech Mono', monospace);
    font-size: 0.82rem;
    line-height: 1.5;
    tab-size: 4;
}

.bash-script-editor:focus {
    outline: none;
    border-color: rgba(166, 227, 161, 0.45);
    box-shadow: 0 0 0 3px rgba(166, 227, 161, 0.08);
}

.bash-learn-toolbar {
    flex-shrink: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.bash-help-btn {
    padding: 10px 16px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.05);
    color: #bac2de;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body, sans-serif);
}

.bash-help-btn:hover {
    background: rgba(255, 255, 255, 0.09);
    color: #e8e8ef;
}

.bash-submit-btn {
    padding: 10px 20px;
    border-radius: 10px;
    border: 1px solid rgba(166, 227, 161, 0.45);
    background: rgba(166, 227, 161, 0.12);
    color: #a6e3a1;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font-body, sans-serif);
}

.bash-submit-btn:hover {
    background: rgba(166, 227, 161, 0.2);
}

.bash-hint-box {
    margin: 0;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 0.82rem;
    line-height: 1.5;
    color: #f9e2af;
    background: rgba(249, 226, 175, 0.08);
    border: 1px solid rgba(249, 226, 175, 0.2);
}

.ite-practice-column .pane-terminal {
    flex: 1 1 auto;
    min-height: 0;
}

.ite-practice-column--bash .pane-terminal {
    flex: unset;
    min-height: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.ite-practice-column--bash #terminal-iframe {
    flex: 1;
    min-height: 240px;
}

@media (min-width: 1025px) {
    .ite-practice-column--bash #terminal-iframe {
        min-height: 0;
    }
}

/* ── Validation modal ── */
.validation-overlay {
    position: absolute;
    inset: 0;
    z-index: 50;
    display: none;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(10px);
}

.validation-card {
    width: 100%;
    max-width: 400px;
    padding: 32px 28px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(24, 24, 37, 0.98);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

.success-card {
    border-color: rgba(166, 227, 161, 0.35);
    background: linear-gradient(165deg, rgba(166, 227, 161, 0.08), rgba(24, 24, 37, 0.98));
}

.fail-card {
    border-color: rgba(243, 139, 168, 0.35);
    background: linear-gradient(165deg, rgba(243, 139, 168, 0.07), rgba(24, 24, 37, 0.98));
}

.feedback-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.success-card .feedback-title {
    color: #a6e3a1;
}

.fail-card .feedback-title {
    color: #f38ba8;
}

.feedback-msg {
    font-size: 0.92rem;
    line-height: 1.55;
    color: #bac2de;
    margin-bottom: 22px;
}

.validation-btn {
    width: 100%;
    padding: 12px 18px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-main, #e8e8ef);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-body, sans-serif);
}

.validation-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

@keyframes learnFadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

.validation-overlay[style*="flex"] {
    animation: learnFadeIn 0.25s ease;
}

/* Accesibilidad y foco visible (teclado) */
.learn-tab:focus-visible,
.learn-lesson-row:focus-visible,
.learn-search-input:focus-visible {
    outline: 2px solid rgba(137, 220, 235, 0.45);
    outline-offset: 2px;
}

.learn-hero {
    scroll-margin-top: 24px;
}