/**
 * ============================================================================
 * LINUX MANUAL - UNIFIED CSS COMPLETO
 * ============================================================================
 * 
 * STRUTTURA:
 * 1. Variabili CSS unificate (TUTTE le variabili)
 * 2. Reset e base styles
 * 3. Layout generale Linux 
 * 4. Sistema terminale avanzato (merge intelligente)
 * 5. Dashboard e user interface
 * 6. Sistema moduli e progress
 * 7. Navigation e breadcrumb
 * 8. Modal training e interazioni
 * 9. Accessibility e performance
 * 10. Responsive design unificato
 * 11. Browser fixes e utility
 * 12. Compatibilità legacy
 */

/* ============================================================================
   1. VARIABILI
   ============================================================================ */

:root {
    /* === COLORI TEMA LINUX === */
    --linux-green: #00ff41;
    --linux-green-bright: #00ff88;
    --linux-dark: #0a0a0a;
    --linux-gray: #1a1a1a;
    --linux-orange: #ff6600;
    --linux-yellow: #ffff00;
    --linux-blue: #00aaff;
    --linux-red: #ff4444;

    /* === COLORI TERMINALE  === */
    --terminal-bg: #0c0c0c;
    /* Più scuro per miglior contrasto */
    --terminal-text: #00ff41;
    --terminal-text-dim: #00cc33;
    --terminal-border: #1a1a1a;
    --terminal-header: #1e1e1e;
    --terminal-prompt: #00aaff;

    /* === COLORI OUTPUT TERMINALE  === */
    --terminal-command: #ffffff;
    --terminal-error: #ff6b6b;
    --terminal-system: #74c0fc;
    --terminal-help: #ffd43b;
    --terminal-file: #69db7c;
    --terminal-fun: #ff8cc8;
    --terminal-explanation: #a78bfa;
    --terminal-welcome: #51cf66;

    /* === COLORI PROMPT (da ) === */
    --prompt-user: #51cf66;
    --prompt-host: #ffd43b;
    --prompt-path: #74c0fc;

    /* === UI ELEMENTS  === */
    --linux-border: rgba(0, 255, 65, 0.3);
    --linux-hover-bg: rgba(0, 255, 65, 0.1);
    --linux-card-bg: rgba(0, 255, 65, 0.05);
    --linux-shadow: rgba(0, 255, 65, 0.2);

    /* === TYPOGRAPHY  === */
    --linux-font: 'Consolas', 'Monaco', 'Courier New', 'Lucida Console', monospace;

    /* === STATUS COLORS  === */
    --linux-success: #00ff88;
    --linux-warning: #ffaa00;
    --linux-error: #ff3333;

    /* === TEXT VARIANTS  === */
    --linux-text: #00ff41;
    --linux-text-bright: #00ff88;
    --linux-text-dim: rgba(0, 255, 65, 0.7);
    --linux-bg: #0a0a0a;

    /* === DIMENSIONI TERMINALE  === */
    --terminal-border-radius: 8px;
    --terminal-padding: 16px;
    --terminal-line-height: 1.4;
    --terminal-font-size: 14px;

    /* === ANIMAZIONI  === */
    --terminal-transition: all 0.2s ease;
    --cursor-blink: 1s infinite;

    /* === COLORI BANNER ===*/
    --cookie-primary: #ff3366;
    /* Colore principale banner */
    --cookie-bg: #111;
    /* Sfondo banner */
    --cookie-text: #fff;
    /* Testo banner */
    --cookie-border: #333;
    /* Bordi e separatori */
}

/* ============================================================================
   2. RESET E BASE STYLES
   ============================================================================ */

/* Background globale Linux */
body:has(.sezione-linux),
body .sezione-linux~*,
.sezione-linux~footer {
    background: var(--linux-bg) !important;
    color: var(--linux-text);
}

.sezione-linux {
    font-family: var(--linux-font);
    background: var(--linux-bg);
    color: var(--linux-text);
    min-height: 100vh;
    width: 100%;
}

/* Footer nero nella pagina Linux */
.sezione-linux~footer,
body:has(.sezione-linux) footer {
    background: var(--linux-bg) !important;
    border-top: 1px solid var(--linux-border);
}

/* ============================================================================
   3. LAYOUT GENERALE LINUX
   ============================================================================ */

/* === Layout Sezione Linux Tradizionale === */
.sezione-linux .categoria-wrapper {
    background: var(--linux-bg);
    color: var(--linux-text);
    max-width: 900px;
    margin: 2rem 2rem 2rem 2rem;
    margin-right: 3rem;
    padding: 0 2rem;
}

.categoria-wrapper.sezione-linux {
    max-width: 95%;
    margin: 2rem 2rem 2rem 3rem;
    padding: 2rem 2rem;
}

/* === Layout Linux Manual === */
.linux-manual-main {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--linux-dark) 0%, #1a2332 100%);
    color: #ffffff;
    font-family: var(--linux-font);
}

.linux-manual-main .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* === Intestazione Linux === */
.sezione-linux .intestazione {
    color: var(--linux-text);
    margin-bottom: 3rem;
}

.sezione-linux .intestazione-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.sezione-linux .intestazione h1 {
    color: var(--linux-text);
    font-family: var(--linux-font);
    text-shadow: 0 0 10px var(--linux-shadow);
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.sezione-linux .sottotitolo {
    color: var(--linux-text);
    opacity: 0.8;
    font-style: italic;
    margin-bottom: 1rem;
}

.sezione-linux .motivazione {
    background: var(--linux-hover-bg);
    border: 1px solid var(--linux-border);
    border-left: 3px solid var(--linux-text);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.sezione-linux .motivazione p {
    color: var(--linux-text);
    opacity: 0.9;
    margin: 0;
    line-height: 1.6;
}

.sezione-linux .stats {
    color: var(--linux-text);
    opacity: 0.8;
    font-family: var(--linux-font);
    font-size: 0.9rem;
}

/* === Hero Section Manual === */
.manual-hero {
    padding: 4rem 0;
    text-align: center;
    background: linear-gradient(135deg, #0f1419 0%, #1a2332 100%);
    border-radius: 15px;
    margin-bottom: 3rem;
    border: 1px solid var(--linux-green);
    box-shadow:
        0 0 20px var(--linux-shadow),
        inset 0 0 20px var(--linux-hover-bg);
}

.hero-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--linux-green);
    text-shadow: 0 0 10px var(--linux-green);
    font-weight: bold;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: #ffffff;
    opacity: 0.9;
}

.hero-description {
    max-width: 600px;
    margin: 0 auto 2rem;
    opacity: 0.8;
    line-height: 1.6;
}

/* === Pulsantiera Linux === */
.sezione-linux .pulsantiera {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.sezione-linux .pulsantiera .pulsante {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-border);
    border-radius: 8px;
    color: var(--linux-text);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.sezione-linux .pulsantiera .pulsante:hover {
    background: var(--linux-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px var(--linux-shadow);
}

.sezione-linux .pulsantiera .pulsante::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--linux-text), transparent);
    transition: left 0.5s ease;
}

.sezione-linux .pulsantiera .pulsante:hover::before {
    left: 100%;
}

.sezione-linux .pulsantiera .pulsante .icona {
    color: var(--linux-text);
    font-size: 1.5rem;
    width: 2rem;
    flex-shrink: 0;
}

.sezione-linux .pulsantiera .pulsante .nome {
    flex: 1;
    margin-left: 1rem;
    color: var(--linux-text);
}

.sezione-linux .pulsantiera .pulsante .nome strong {
    color: var(--linux-text);
    font-weight: 600;
    display: block;
    margin-bottom: 0.2rem;
}

.sezione-linux .pulsantiera .pulsante .nome small {
    color: var(--linux-text);
    opacity: 0.8;
    display: block;
    font-size: 0.8rem;
    line-height: 1.3;
}

.sezione-linux .pulsantiera .pulsante .nome code {
    background: var(--linux-hover-bg);
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    font-size: 0.75rem;
    border: 1px solid var(--linux-border);
    color: var(--linux-text);
}

.sezione-linux .pulsantiera .pulsante .numero {
    color: var(--linux-text);
    opacity: 0.8;
    font-family: var(--linux-font);
    font-size: 0.9rem;
}

/* ============================================================================
   4. SISTEMA TERMINALE AVANZATO (MERGE INTELLIGENTE)
   ============================================================================ */

/* === Wrapper e Container (da  + stili linux-unified.css) === */
.terminal-wrapper {
    width: 100%;
    margin: 1rem 0;
    font-family: var(--linux-font);
    position: relative;
}

.terminal-container,
.linux-terminal-window {
    background: var(--terminal-bg);
    color: var(--terminal-text);
    font-family: var(--linux-font);
    max-width: 800px;
    margin: 2rem auto;
    border-radius: var(--terminal-border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3), 0 0 15px var(--linux-shadow);
    overflow: hidden;
    border: 1px solid var(--terminal-border);
    transition: var(--terminal-transition);
    position: relative;
}

.terminal-container:hover {
    box-shadow: 0 6px 12px rgba(0, 255, 65, 0.1), 0 0 20px var(--linux-shadow);
}

/* === Header Terminale (merge intelligente) === */
.terminal-header {
    background: var(--terminal-header);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--terminal-border);
    position: relative;
}

.terminal-buttons {
    display: flex;
    gap: 8px;
    align-items: center;
}

.terminal-buttons span,
.terminal-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: block;
}

.btn-close,
.terminal-header .red {
    background: #ff5f56;
}

.btn-minimize,
.terminal-header .yellow {
    background: #ffbd2e;
}

.btn-maximize,
.terminal-header .green {
    background: #27ca3f;
}

.terminal-title,
.terminal-header .terminal-title {
    color: var(--terminal-text-dim);
    font-size: 13px;
    font-weight: bold;
    flex: 1;
    text-align: center;
    margin: 0 16px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.terminal-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.terminal-actions button {
    background: var(--terminal-border);
    color: var(--terminal-text);
    border: none;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
    transition: var(--terminal-transition);
}

.terminal-actions button:hover {
    background: var(--terminal-text-dim);
    color: var(--terminal-bg);
}

/* === Body Terminale (da ) === */
.terminal-body {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.terminal-output {
    background: var(--terminal-bg);
    color: var(--terminal-text);
    padding: var(--terminal-padding);
    font-family: inherit;
    font-size: var(--terminal-font-size);
    line-height: var(--terminal-line-height);
    max-height: 400px;
    min-height: 200px;
    overflow-y: auto;
    overflow-x: hidden;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--terminal-border) var(--terminal-bg);
    padding-bottom: 20px;
    flex: 1;
}

.terminal-output::-webkit-scrollbar {
    width: 8px;
}

.terminal-output::-webkit-scrollbar-track {
    background: var(--terminal-bg);
}

.terminal-output::-webkit-scrollbar-thumb {
    background: var(--terminal-border);
    border-radius: 4px;
}

.terminal-output::-webkit-scrollbar-thumb:hover {
    background: var(--terminal-text-dim);
}

/* === Linee Terminale e Contenuto (da ) === */
.terminal-line {
    margin: 0;
    padding: 2px 0;
    word-wrap: break-word;
    white-space: pre-wrap;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    min-height: 1.4em;
}

.terminal-text {
    color: var(--terminal-text);
}

.command-text {
    color: var(--terminal-command);
}

/* Colori specifici per tipo contenuto */
.terminal-line.command {
    color: var(--terminal-command);
    font-weight: bold;
}

.terminal-line.output {
    color: var(--terminal-text);
    margin-left: 0;
}

.terminal-line.error {
    color: var(--terminal-error);
}

.terminal-line.system {
    color: var(--terminal-system);
}

.terminal-line.help {
    color: var(--terminal-help);
    background: rgba(255, 212, 59, 0.1);
    padding: 8px;
    border-radius: 4px;
    margin: 4px 0;
    border-left: 3px solid var(--terminal-help);
}

.terminal-line.explanation {
    color: var(--terminal-explanation);
    font-style: italic;
    margin-left: 16px;
}

.terminal-line.welcome {
    color: var(--terminal-welcome);
    font-weight: bold;
}

.terminal-line.loading {
    color: var(--terminal-system);
    font-style: italic;
}

/* Elementi speciali dentro le linee */
.terminal-info {
    color: var(--terminal-system);
    font-weight: bold;
}

.command-available {
    color: var(--terminal-file);
    font-weight: bold;
}

.command-desc {
    color: var(--terminal-text-dim);
    margin-left: 8px;
}

.terminal-separator {
    color: var(--terminal-border);
    margin: 8px 0;
    border-top: 1px solid var(--terminal-border);
    padding-top: 8px;
}

.loading-spinner {
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* === Input Area (da ) === */
.terminal-input-line {
    display: flex;
    align-items: center;
    background: var(--terminal-bg);
    padding: var(--terminal-padding);
    border-top: 1px solid var(--terminal-border);
    position: relative;
    flex-shrink: 0;
}

.prompt {
    color: var(--prompt-user);
    font-weight: bold;
    margin-right: 8px;
    white-space: nowrap;
    flex-shrink: 0;
    font-family: inherit;
    font-size: var(--terminal-font-size);
}

.terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--terminal-text);
    font-family: inherit;
    font-size: var(--terminal-font-size);
    line-height: var(--terminal-line-height);
    padding: 0;
    margin: 0;
    caret-color: var(--terminal-text);
}

.terminal-input::placeholder {
    color: var(--terminal-text-dim);
    opacity: 0.7;
}

.terminal-input:focus {
    outline: none;
}

.terminal-readonly {
    color: var(--terminal-text-dim);
}

.cursor {
    color: var(--terminal-text);
    animation: blink var(--cursor-blink);
    font-weight: bold;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0;
    }
}

/* ============================================================================
   5. DASHBOARD E USER INTERFACE
   ============================================================================ */

/* === Dashboard Utente === */
.user-dashboard {
    background: var(--linux-hover-bg);
    border: 1px solid var(--linux-green);
    border-radius: 10px;
    padding: 2rem;
    margin-top: 2rem;
    text-align: left;
}

.welcome-back {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.welcome-back h3 {
    margin: 0;
    color: var(--linux-green);
    font-size: 1.5rem;
}

.user-badge {
    background: var(--linux-green);
    color: var(--linux-dark);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
}

.progress-overview {
    margin-bottom: 1.5rem;
}

.progress-bar-container {
    background: rgba(0, 0, 0, 0.5);
    border-radius: 10px;
    height: 20px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--linux-green), var(--linux-yellow));
    border-radius: 10px;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.8;
}

.quick-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    text-align: center;
}

.stat {
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--linux-border);
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--linux-green);
}

.stat-label {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* === Statistiche Generali === */
.manual-stats {
    margin-bottom: 3rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--linux-hover-bg);
    border: 1px solid var(--linux-green);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    background: var(--linux-card-bg);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px var(--linux-shadow);
}

.stat-numero {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: var(--linux-green);
    margin-bottom: 0.5rem;
}

/* ============================================================================
   6. SISTEMA MODULI E PROGRESS
   ============================================================================ */

/* === Sezione Moduli === */
.moduli-section {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2rem;
    color: var(--linux-green);
    text-align: center;
    margin-bottom: 1rem;
    text-shadow: 0 0 5px var(--linux-green);
}

.section-subtitle {
    text-align: center;
    opacity: 0.8;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.moduli-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.modulo-card {
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-green);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.modulo-card:hover {
    background: var(--linux-hover-bg);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--linux-shadow);
}

.modulo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--linux-green), transparent);
    transition: left 0.5s ease;
}

.modulo-card:hover::before {
    left: 100%;
}

.modulo-card.completed {
    border-color: var(--linux-yellow);
    background: rgba(255, 255, 0, 0.05);
}

.modulo-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.modulo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.modulo-numero {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--linux-green);
    width: 40px;
    height: 40px;
    border: 2px solid var(--linux-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modulo-card.completed .modulo-numero {
    background: var(--linux-yellow);
    color: var(--linux-dark);
    border-color: var(--linux-yellow);
}

.modulo-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.durata,
.difficolta {
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: bold;
}

.durata {
    background: rgba(0, 170, 255, 0.2);
    color: var(--linux-blue);
    border: 1px solid var(--linux-blue);
}

.difficolta {
    border: 1px solid;
}

.difficolta-principiante,
.difficolta-facile {
    background: rgba(0, 255, 0, 0.2);
    color: #00ff00;
    border-color: #00ff00;
}

.difficolta-intermedio,
.difficolta-medio {
    background: rgba(255, 165, 0, 0.2);
    color: #ffa500;
    border-color: #ffa500;
}

.difficolta-avanzato {
    background: rgba(255, 0, 0, 0.2);
    color: #ff0000;
    border-color: #ff0000;
}

.modulo-title {
    margin: 0 0 1rem 0;
    font-size: 1.3rem;
}

.modulo-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

.modulo-title a:hover {
    color: var(--linux-green);
}

.modulo-descrizione {
    margin-bottom: 1rem;
    opacity: 0.9;
    line-height: 1.5;
}

.modulo-deliverable {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.8rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 3px solid var(--linux-orange);
    font-size: 0.9rem;
}

.completion-info {
    background: rgba(255, 255, 0, 0.1);
    color: var(--linux-yellow);
    padding: 0.5rem;
    border-radius: 5px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.quiz-score {
    float: right;
    font-weight: bold;
}

.modulo-actions {
    margin-top: auto;
}

.btn-modulo {
    display: block;
    width: 100%;
    padding: 0.8rem;
    background: var(--linux-green);
    color: var(--linux-dark);
    text-decoration: none;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-modulo:hover {
    background: var(--linux-yellow);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--linux-shadow);
}

.btn-modulo.locked {
    background: #666;
    color: #ccc;
    cursor: not-allowed;
}

/* === Form Completamento Modulo === */
.completion-form textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--linux-border);
    border-radius: 8px;
    padding: 1rem;
    color: var(--linux-text);
    font-family: var(--linux-font);
    font-size: 0.95rem;
    line-height: 1.5;
    resize: vertical;
    min-height: 100px;
    transition: all 0.3s ease;
}

.completion-form textarea:focus {
    outline: none;
    border-color: var(--linux-green);
    box-shadow: 0 0 10px var(--linux-shadow);
    background: rgba(0, 255, 65, 0.05);
}

.completion-form textarea::placeholder {
    color: rgba(0, 255, 65, 0.5);
    font-style: italic;
}

.btn-complete {
    display: block;
    width: 100%;
    background: linear-gradient(135deg, var(--linux-success), var(--linux-green));
    color: var(--linux-dark);
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-family: var(--linux-font);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-complete:hover {
    background: linear-gradient(135deg, var(--linux-green), var(--linux-yellow));
    transform: translateY(-2px);
    box-shadow: 0 5px 20px var(--linux-shadow);
}

.btn-complete:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px var(--linux-shadow);
}

.btn-complete::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-complete:hover::before {
    left: 100%;
}

/* === Contenuto Modulo === */
.modulo-body {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    line-height: 1.7;
}

.modulo-body h2 {
    color: var(--linux-green);
    margin: 2rem 0 1rem 0;
    font-size: 1.8rem;
    text-shadow: 0 0 5px rgba(0, 255, 65, 0.3);
}

.modulo-body h3 {
    color: var(--linux-yellow);
    margin: 1.5rem 0 1rem 0;
    font-size: 1.4rem;
}

.modulo-body p {
    margin-bottom: 1rem;
    opacity: 0.9;
}

.modulo-body ul,
.modulo-body ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.modulo-body li {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.modulo-body blockquote {
    background: rgba(0, 255, 65, 0.1);
    border-left: 4px solid var(--linux-green);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    font-style: italic;
    border-radius: 0 8px 8px 0;
}

.modulo-body code {
    background: rgba(0, 0, 0, 0.5);
    color: var(--linux-green);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: var(--linux-font);
}

.modulo-body .test-compatibilita {
    background: rgba(0, 170, 255, 0.1);
    border: 2px solid #00aaff;
    border-radius: 10px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.modulo-body .test-compatibilita h3 {
    color: #00aaff;
    margin-top: 0;
}

/* === Modulo Dettaglio === */
.modulo-header-detail {
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-green);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 3rem;
    display: flex;
    align-items: flex-start;
    gap: 2rem;
}

.modulo-number-badge {
    flex-shrink: 0;
}

.number-badge,
.completed-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border: 3px solid var(--linux-green);
    border-radius: 50%;
    font-size: 2rem;
    font-weight: bold;
    color: var(--linux-green);
}

.completed-badge {
    background: var(--linux-yellow);
    color: var(--linux-dark);
    border-color: var(--linux-yellow);
    font-size: 2.5rem;
}

.modulo-info {
    flex: 1;
}

.modulo-title-main {
    font-size: 2.5rem;
    color: var(--linux-green);
    margin-bottom: 1rem;
    text-shadow: 0 0 10px var(--linux-shadow);
}

.modulo-meta-detail {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.meta-item {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid var(--linux-border);
}

.completion-date {
    background: rgba(255, 255, 0, 0.2);
    border-color: var(--linux-yellow);
    color: var(--linux-yellow);
}

.modulo-descrizione-detail {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.modulo-deliverable-detail {
    background: rgba(0, 170, 255, 0.1);
    border: 2px solid var(--linux-blue);
    border-radius: 10px;
    padding: 1rem;
    color: var(--linux-blue);
    font-size: 1rem;
}

/* ============================================================================
   7. NAVIGATION E BREADCRUMB
   ============================================================================ */

/* === Breadcrumb Unificato === */
.sezione-linux .breadcrumb,
.breadcrumb {
    color: var(--linux-text);
    opacity: 0.7;
    font-family: var(--linux-font);
    padding: 1rem 0;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--linux-border);
    margin-bottom: 2rem;
}

.sezione-linux .breadcrumb a,
.breadcrumb a {
    color: var(--linux-text);
    text-decoration: none;
    transition: all 0.3s ease;
}

.sezione-linux .breadcrumb a:hover,
.breadcrumb a:hover {
    color: var(--linux-text);
    opacity: 1;
    text-shadow: 0 0 5px var(--linux-shadow);
}

.breadcrumb span {
    margin: 0 0.5rem;
    color: #666;
}

/* === Navigation Moduli === */
.modulo-navigation {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.nav-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    display: block;
    background: rgba(0, 255, 65, 0.05);
    border: 1px solid rgba(0, 255, 65, 0.3);
    border-radius: 10px;
    padding: 1rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: rgba(0, 255, 65, 0.1);
    border-color: var(--linux-green);
    transform: translateY(-2px);
}

.nav-prev {
    text-align: left;
}

.nav-next {
    text-align: right;
}

.nav-direction {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 0.5rem;
}

.nav-title {
    font-weight: bold;
    color: var(--linux-green);
}

.nav-home {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 170, 255, 0.1);
    border: 1px solid #00aaff;
    border-radius: 10px;
    padding: 1rem;
    text-decoration: none;
    color: #00aaff;
    transition: all 0.3s ease;
}

.nav-home:hover {
    background: rgba(0, 170, 255, 0.2);
    transform: scale(1.05);
}

.nav-icon {
    font-size: 1.5rem;
}

.nav-text {
    font-size: 0.9rem;
    font-weight: bold;
}

.nav-placeholder {
    /* Spazio vuoto per mantenere il grid */
}

/* === CTA e Navigation === */
.sezione-linux .altre-sezioni-nav {
    margin-bottom: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--linux-border);
}

.sezione-linux .altre-sezioni-nav h3 {
    color: var(--linux-text);
    font-family: var(--linux-font);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

.sezione-linux .sezioni-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.sezione-linux .sezioni-links .categoria-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-border);
    border-radius: 4px;
    color: var(--linux-text);
    font-family: var(--linux-font);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.sezione-linux .sezioni-links .categoria-link:hover {
    background: var(--linux-hover-bg);
    color: var(--linux-text-bright);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--linux-shadow);
}

/* === Separatori === */
.sezione-linux .separatore {
    margin: 3rem 0 2rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--linux-border);
}

.sezione-linux .separatore h2 {
    color: var(--linux-text);
    font-family: var(--linux-font);
    text-shadow: 0 0 5px var(--linux-shadow);
    font-size: 1.5rem;
    opacity: 0.8;
    font-weight: 400;
}

/* === Articoli e Contenuti === */
.sezione-linux .articolo-estratto {
    color: var(--linux-text);
    opacity: 0.9;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.sezione-linux .leggi-link {
    color: var(--linux-text);
    font-family: var(--linux-font);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
}

.sezione-linux .leggi-link:hover {
    color: var(--linux-text);
    text-shadow: 0 0 5px var(--linux-shadow);
    text-decoration: underline;
}

/* ============================================================================
   8. MODAL TRAINING E INTERAZIONI (da )
   ============================================================================ */

.terminal-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.modal-content {
    background: var(--terminal-bg);
    border: 1px solid var(--terminal-border);
    border-radius: var(--terminal-border-radius);
    max-width: 90vw;
    max-height: 90vh;
    width: 800px;
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    background: var(--terminal-header);
    padding: 16px;
    border-bottom: 1px solid var(--terminal-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    color: var(--terminal-text);
    margin: 0;
    font-size: 16px;
}

.modal-close {
    background: var(--terminal-error);
    color: white;
    border: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    flex: 1;
    overflow: hidden;
}

.modal-footer {
    background: var(--terminal-header);
    padding: 16px;
    border-top: 1px solid var(--terminal-border);
    text-align: center;
}

/* ============================================================================
   9. ACCESSIBILITY E PERFORMANCE (da )
   ============================================================================ */

/* Focus visibility - outline rimosso per input terminale */
.terminal-input:focus {
    outline: none;
}

.terminal-actions button:focus {
    outline: 2px solid var(--terminal-text);
    outline-offset: 2px;
}

/* Screen reader support */
.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;
}

/* Touch targets for mobile */
@media (pointer: coarse) {
    .terminal-actions button {
        min-height: 44px;
        min-width: 44px;
    }

    .modal-close {
        min-height: 44px;
        min-width: 44px;
    }
}

/* GPU acceleration for smooth animations */
.terminal-container,
.terminal-output {
    transform: translateZ(0);
    will-change: scroll-position;
}

.loading-spinner {
    will-change: transform;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --terminal-bg: #000000;
        --terminal-text: #ffffff;
        --terminal-border: #ffffff;
        --terminal-header: #333333;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .terminal-container {
        transition: none;
    }

    .cursor {
        animation: none;
    }

    .loading-spinner {
        animation: none;
    }

    .terminal-output {
        scroll-behavior: auto;
    }
}

/* Utility classes */
.terminal-force-scroll {
    scroll-behavior: auto !important;
}

.terminal-no-select {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.terminal-debug .terminal-output {
    border: 2px dashed var(--terminal-error);
}

.terminal-debug .terminal-input-line {
    border: 2px dashed var(--terminal-help);
}

/* ============================================================================
   10. RESPONSIVE DESIGN UNIFICATO
   ============================================================================ */

@media (max-width: 768px) {

    /* Layout generale */
    .categoria-wrapper.sezione-linux {
        max-width: 100%;
        margin: 1rem 1rem !important;
        padding: 0 1rem !important;
    }

    .sezione-linux .categoria-wrapper {
        margin: 1rem auto 1rem 1rem;
        padding: 0 1rem;
    }

    .linux-manual-main .container {
        padding: 0 1rem;
    }

    /* Hero e titoli */
    .hero-title {
        font-size: 2rem;
    }

    .sezione-linux .intestazione h1 {
        font-size: 1.8rem;
    }

    .sezione-linux .intestazione-icon {
        font-size: 2.5rem;
    }

    /* Grids */
    .moduli-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .quick-stats {
        grid-template-columns: 1fr;
    }

    /* Dashboard */
    .welcome-back {
        flex-direction: column;
        text-align: center;
    }

    /* Terminale */
    .terminal-wrapper {
        margin: 0.5rem 0;
    }

    .terminal-header {
        padding: 8px 12px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .terminal-title {
        font-size: 12px;
        margin: 0 8px;
    }

    .terminal-output {
        padding: 12px;
        font-size: 13px;
        max-height: 300px;
        min-height: 150px;
    }

    .terminal-input-line {
        padding: 12px;
    }

    .terminal-input,
    .prompt {
        font-size: 13px;
    }

    .terminal-container,
    .linux-terminal-window {
        margin: 1rem 0;
        max-width: calc(100% - 2rem);
    }

    /* Pulsantiera */
    .sezione-linux .pulsantiera .pulsante {
        padding: 0.8rem 1rem;
    }

    .sezione-linux .pulsantiera .pulsante .icona {
        font-size: 1.2rem;
        width: 1.5rem;
    }

    .sezione-linux .pulsantiera .pulsante .nome {
        margin-left: 0.8rem;
    }

    .sezione-linux .pulsantiera .pulsante .nome strong {
        font-size: 0.95rem;
    }

    .sezione-linux .pulsantiera .pulsante .nome small {
        font-size: 0.75rem;
    }

    .sezione-linux .pulsantiera .pulsante .nome code {
        font-size: 0.7rem;
    }

    /* Links e navigation */
    .sezione-linux .sezioni-links {
        flex-direction: column;
    }

    .sezione-linux .sezioni-links .categoria-link {
        text-align: center;
    }

    .sezione-linux .cta-finale {
        padding: 1.5rem 1rem;
    }

    /* Moduli dettaglio */
    .modulo-header-detail {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .modulo-title-main {
        font-size: 2rem;
    }

    .modulo-meta-detail {
        justify-content: center;
        gap: 1rem;
    }

    .number-badge,
    .completed-badge {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    /* Modal */
    .modal-content {
        width: 95vw;
        max-height: 80vh;
    }

    /* Actions terminale */
    .terminal-actions {
        flex-wrap: wrap;
        gap: 4px;
    }

    .terminal-actions button {
        font-size: 10px;
        padding: 3px 6px;
    }
}

@media (max-width: 480px) {

    /* Hero extra small */
    .hero-icon {
        font-size: 3rem;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    /* Grid single column */
    .stats-grid {
        grid-template-columns: 1fr;
    }

    /* Moduli header */
    .modulo-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    /* Terminale compact */
    .terminal-header {
        padding: 0.5rem;
    }

    .terminal-body {
        padding: 0.5rem;
    }

    .terminal-output {
        font-size: 12px;
        padding: 8px;
        max-height: 250px;
        min-height: 120px;
    }

    .terminal-input-line {
        padding: 8px;
    }

    .terminal-input,
    .prompt {
        font-size: 12px;
    }

    .terminal-line.help {
        padding: 6px;
        font-size: 11px;
    }

    /* Actions e buttons */
    .denied-actions {
        flex-direction: column;
        align-items: center;
    }

    .meta-item {
        font-size: 0.8rem;
        padding: 0.3rem 0.8rem;
    }
}

/* ============================================================================
   11. BROWSER FIXES E UTILITY (da )
   ============================================================================ */

/* Firefox scrollbar */
@-moz-document url-prefix() {
    .terminal-output {
        scrollbar-width: thin;
        scrollbar-color: var(--terminal-border) var(--terminal-bg);
    }
}

/* Safari fixes */
@supports (-webkit-appearance: none) {
    .terminal-input {
        -webkit-appearance: none;
    }
}

/* Print styles */
@media print {
    .terminal-wrapper {
        break-inside: avoid;
    }

    .terminal-header,
    .terminal-input-line {
        display: none;
    }

    .terminal-output {
        max-height: none;
        overflow: visible;
        padding: 0;
        border: 1px solid #000;
    }

    .terminal-line {
        color: #000 !important;
        background: transparent !important;
    }
}

/* ============================================================================
   12. COMPATIBILITÀ LEGACY E COMPONENTI MANCANTI
   ============================================================================ */

/* === Manifesto === */
.linux-manifesto {
    background-color: var(--linux-bg);
    color: var(--terminal-text);
    padding: 2rem;
    font-family: var(--linux-font);
    min-height: 80vh;
}

.linux-manifesto .terminal-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--terminal-text);
    text-align: center;
    animation: terminal-blink 1s step-start infinite;
}

.bash-style {
    background-color: #111;
    color: var(--terminal-text);
    padding: 1.5rem;
    border-left: 5px solid var(--linux-green);
    border-radius: 4px;
    white-space: pre-wrap;
    line-height: 1.5;
    font-size: 1rem;
    overflow-x: auto;
    box-shadow: 0 0 10px var(--linux-shadow);
    margin: 2rem 0;
}

.download-link {
    display: inline-block;
    margin-top: 2rem;
    color: var(--terminal-text);
    text-decoration: none;
    font-weight: bold;
    font-family: var(--linux-font);
    background: transparent;
    border: 1px dashed var(--linux-green);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.download-link:hover {
    background: var(--linux-green);
    color: var(--linux-bg);
    text-decoration: none;
    box-shadow: 0 0 10px var(--linux-shadow);
}

/* === Bottoni unificati === */
.sezione-linux .btn,
.btn-primary,
.btn-secondary {
    display: inline-block;
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-text);
    color: var(--linux-text);
    font-family: var(--linux-font);
    font-weight: 600;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.2s ease;
    border: 2px solid;
}

.sezione-linux .btn:hover,
.btn-primary:hover {
    background: var(--linux-hover-bg);
    color: var(--linux-text);
    box-shadow: 0 0 20px var(--linux-shadow);
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--linux-green);
    color: var(--linux-dark);
    border-color: var(--linux-green);
}

.btn-primary:hover {
    background: var(--linux-yellow);
    border-color: var(--linux-yellow);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--linux-shadow);
}

.btn-secondary {
    background: transparent;
    color: var(--linux-green);
    border-color: var(--linux-green);
}

.btn-secondary:hover {
    background: var(--linux-green);
    color: var(--linux-dark);
}

/* === CTA finale === */
.sezione-linux .cta-finale {
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-border);
    border-radius: 8px;
    padding: 2rem;
    color: var(--linux-text);
    text-align: center;
}

.sezione-linux .cta-finale h3 {
    color: var(--linux-text);
    font-family: var(--linux-font);
    text-shadow: 0 0 5px var(--linux-shadow);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

.sezione-linux .cta-finale p {
    color: var(--linux-text);
    opacity: 0.9;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.final-cta {
    text-align: center;
    padding: 3rem;
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-green);
    border-radius: 15px;
    margin-bottom: 2rem;
}

.cta-content h2 {
    color: var(--linux-green);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.cta-content p {
    opacity: 0.9;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.completion-celebration {
    background: rgba(255, 255, 0, 0.1);
    padding: 2rem;
    border-radius: 10px;
    border: 2px solid var(--linux-yellow);
}

.completion-celebration h3 {
    color: var(--linux-yellow);
    margin-bottom: 1rem;
}

/* === Notifiche === */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.notification-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.notification-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.notification-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0.7;
    padding: 0;
    margin: 0;
    line-height: 1;
}

.notification-close:hover {
    opacity: 1;
}

.notification.auto-fade {
    position: relative;
    overflow: hidden;
}

.notification.auto-fade::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: currentColor;
    opacity: 0.3;
    animation: progressBar 5s linear;
}

@keyframes progressBar {
    from {
        width: 100%;
    }

    to {
        width: 0%;
    }
}

/* === Access Denied === */
.access-denied {
    text-align: center;
    padding: 4rem 2rem;
    background: rgba(255, 68, 68, 0.1);
    border: 2px solid var(--linux-error);
    border-radius: 15px;
    margin: 2rem 0;
}

.denied-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
}

.access-denied h2 {
    color: var(--linux-error);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.denied-actions {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* === CTA anonimi === */
.anonymous-completion-cta {
    background: rgba(0, 170, 255, 0.1);
    border: 2px solid #00aaff;
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 3rem;
    text-align: center;
}

.anonymous-completion-cta h3 {
    color: #00aaff;
    margin-bottom: 1rem;
}

/* === FAQ === */
.faq-section {
    margin-bottom: 4rem;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.faq-item {
    background: rgba(0, 0, 0, 0.3);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--linux-border);
}

.faq-item h3 {
    color: var(--linux-green);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.faq-item p {
    opacity: 0.9;
    line-height: 1.5;
    margin: 0;
}

/* === Animazioni === */
@keyframes terminal-blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0.3;
    }
}

@keyframes glitch-flicker {

    0%,
    100% {
        transform: translateX(0);
        opacity: 1;
    }

    20% {
        transform: translateX(-2px);
        opacity: 0.8;
    }

    40% {
        transform: translateX(2px);
    }

    60% {
        transform: translateX(-1px);
    }

    80% {
        transform: translateX(1px);
        opacity: 0.9;
    }
}

/* Glitch effect sui titoli */
.sezione-linux h1:hover,
.sezione-linux h2:hover,
.sezione-linux h3:hover {
    text-shadow:
        0 0 5px var(--linux-text),
        2px 0 0 #ff0080,
        -2px 0 0 #0080ff;
    animation: glitch-flicker 0.3s ease-in-out;
}

/* === Stili Legacy per Compatibilità === */
.linux-section {
    font-family: var(--linux-font);
    color: var(--terminal-text);
    background-color: var(--linux-bg);
    padding: 2rem;
    min-height: 80vh;
}

.linux-links ul {
    list-style: none;
    padding: 0;
}

.linux-links li {
    margin: 1rem 0;
}

.linux-links a {
    color: var(--terminal-text);
    text-decoration: none;
    font-size: 1.2rem;
}

.linux-links a:hover {
    text-decoration: underline;
}

.linux-terminal {
    background: var(--linux-bg);
    color: var(--terminal-text);
    padding: 2rem;
    font-family: var(--linux-font);
    min-height: 80vh;
}

.terminal-typing {
    font-size: 1.2rem;
    line-height: 1.6;
}

.terminal-output pre {
    background: #111;
    padding: 1rem;
    border-left: 5px solid var(--linux-green);
    white-space: pre-wrap;
    box-shadow: 0 0 10px var(--linux-shadow);
}

/* === Articoli Linux === */
.sezione-linux .articoli-lista {
    margin-bottom: 3rem;
}

.sezione-linux .articoli-lista .articolo-item {
    border-bottom: 1px solid var(--linux-border);
    padding: 1.5rem 0;
    margin-bottom: 0;
}

.sezione-linux .articoli-lista .articolo-item:last-child {
    border-bottom: none;
}

.sezione-linux .articolo-titolo {
    color: var(--linux-text);
    font-family: var(--linux-font);
    font-weight: 600;
    text-decoration: none;
    font-size: 1.3rem;
}

.sezione-linux .articolo-titolo:hover {
    color: var(--linux-text);
    text-shadow: 0 0 5px var(--linux-shadow);
    text-decoration: underline;
}

.sezione-linux .articolo-meta {
    color: var(--linux-text);
    opacity: 0.7;
    font-family: var(--linux-font);
    font-size: 0.9rem;
    margin: 0.5rem 0 1rem 0;
}

/* ============================================================================
   13. SISTEMA UTILITY CLASSES RIUTILIZZABILI  
   ============================================================================ */

/* === GRIGLIE UNIFICATE === */
.grid-auto-fit {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.grid-auto-fit.small {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.grid-auto-fit.large {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.grid-auto-fit.fixed-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-auto-fit.fixed-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* === CARD UNIFICATE === */
.card {
    background: var(--linux-card-bg);
    border: 1px solid var(--linux-border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card:hover {
    background: var(--linux-hover-bg);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px var(--linux-shadow);
}

.card.clickable {
    cursor: pointer;
}

.card.clickable::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--linux-green), transparent);
    transition: left 0.5s ease;
}

.card.clickable:hover::before {
    left: 100%;
}

.card.completed {
    border-color: var(--linux-yellow);
    background: rgba(255, 255, 0, 0.05);
}

/* === GRUPPI BOTTONI === */
.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
}

.btn-group.vertical {
    flex-direction: column;
    align-items: stretch;
}

.btn-group.center {
    justify-content: center;
}

/* === LISTE CARATTERISTICHE === */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-list.horizontal {
    flex-direction: row;
    flex-wrap: wrap;
}

.feature-list.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.feature-item:hover {
    background: var(--linux-hover-bg);
    transform: translateX(3px);
}

.feature-item .icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    width: 1.5rem;
    text-align: center;
}

.feature-item .text {
    flex: 1;
    color: var(--linux-text);
    opacity: 0.9;
}

/* === BADGES E META === */
.badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: bold;
    border: 1px solid;
}

.badge.primary {
    background: var(--linux-green);
    color: var(--linux-dark);
    border-color: var(--linux-green);
}

.badge.secondary {
    background: var(--linux-blue);
    color: white;
    border-color: var(--linux-blue);
}

.badge.success {
    background: var(--linux-success);
    color: var(--linux-dark);
    border-color: var(--linux-success);
}

.badge.warning {
    background: var(--linux-warning);
    color: var(--linux-dark);
    border-color: var(--linux-warning);
}

.badge.error {
    background: var(--linux-error);
    color: white;
    border-color: var(--linux-error);
}

.meta-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

/* === SEZIONI UNIFICATE === */
.section {
    margin-bottom: 3rem;
}

.section-header {
    margin-bottom: 2rem;
    text-align: center;
}

.section-title {
    font-size: 1.8rem;
    color: var(--linux-green);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 5px var(--linux-shadow);
}

.section-subtitle {
    opacity: 0.8;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.section-description {
    opacity: 0.7;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

/* === COMMAND ITEMS UNIFICATI === */
.command-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--linux-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.command-item:hover {
    background: var(--linux-hover-bg);
    border-color: var(--linux-green);
    transform: translateY(-2px);
}

.command-item code {
    background: rgba(0, 255, 65, 0.1);
    color: var(--linux-green);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-family: var(--linux-font);
    font-weight: bold;
    font-size: 0.9rem;
}

.command-item span {
    color: var(--linux-text);
    opacity: 0.8;
    font-size: 0.85rem;
}

/* === UTILITY SPACING === */
.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

.p-1 {
    padding: 0.5rem;
}

.p-2 {
    padding: 1rem;
}

.p-3 {
    padding: 1.5rem;
}

.p-4 {
    padding: 2rem;
}

/* === UTILITY TEXT === */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.text-primary {
    color: var(--linux-green);
}

.text-secondary {
    color: var(--linux-blue);
}

.text-muted {
    opacity: 0.7;
}

.text-bright {
    color: var(--linux-text-bright);
}

/* === UTILITY FLEX === */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

.gap-3 {
    gap: 1.5rem;
}

/* === RESPONSIVE UTILITIES === */
@media (max-width: 768px) {
    .grid-auto-fit {
        grid-template-columns: 1fr;
    }

    .grid-auto-fit.fixed-3 {
        grid-template-columns: 1fr;
    }

    .grid-auto-fit.fixed-2 {
        grid-template-columns: 1fr;
    }

    .btn-group {
        flex-direction: column;
        align-items: stretch;
    }

    .feature-list.horizontal {
        flex-direction: column;
    }

    .feature-list.grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }
}

/* Fine unified.css completo */