/* ========================================================
   1. VARIABILI GLOBALI (Material Design 3 adattato al tuo Portfolio)
   ======================================================== */

:root {
    /* --- TEMA CHIARO (Pulito, tipografia coerente) --- */
    --md-sys-color-background: #fafafa;
    --md-sys-color-on-background: #1c1c1e;
    
    --md-sys-color-surface: #ffffff;
    --md-sys-color-on-surface: #1c1c1e;
    --md-sys-color-surface-level1: #f5f5f7;
    --md-sys-color-surface-variant: #f5f5f7;
    --md-sys-color-on-surface-variant: #86868b;
    
    --md-sys-color-primary: #0071e3; 
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #e8f2ff;
    --md-sys-color-on-primary-container: #0071e3;
    
    --md-sys-color-secondary: #ff9f0a; /* Arancione hardware per tag e callout */
    --md-sys-color-outline: rgba(0, 0, 0, 0.1);
    
    /* Ombre ed Elevazioni */
    --md-elevation-1: 0px 2px 8px rgba(0, 0, 0, 0.04);
    --md-elevation-2: 0px 4px 16px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    :root {
        /* --- TEMA SCURO (Allineato al 100% con index.html, style.css e bento grid) --- */
        --md-sys-color-background: #0a0a0a;       /* Sfondo nero assoluto del portfolio */
        --md-sys-color-on-background: #f5f5f7;    /* Bianco grigiastro premium dell'interfaccia */
        
        --md-sys-color-surface: #0a0a0a; 
        --md-sys-color-surface-level1: #111112;   /* Colore esatto delle tue bento box e polaroid */
        --md-sys-color-on-surface: #f5f5f7;
        --md-sys-color-surface-variant: #161617;  /* Sfondo leggermente più chiaro per i blocchi di codice */
        --md-sys-color-on-surface-variant: #86868b;/* Testo secondario/didascalie stile Apple */
        
        --md-sys-color-primary: #2997ff;          /* Il tuo blu elettrico accentato (--accent) */
        --md-sys-color-on-primary: #ffffff;
        --md-sys-color-primary-container: rgba(41, 151, 255, 0.1); /* Container blu traslucido */
        --md-sys-color-on-primary-container: #2997ff;
        
        --md-sys-color-secondary: #ff9f0a;        /* Il tuo iconico arancione hardware */
        --md-sys-color-outline: rgba(255, 255, 255, 0.06); /* Il tuo bordo finissimo trasparente */
        
        /* Elevazioni sintonizzate: linee ultra-sottili invece di ombre pesanti sul nero */
        --md-elevation-1: 0px 0px 0px 1px rgba(255, 255, 255, 0.06);
        --md-elevation-2: 0px 8px 24px rgba(0, 0, 0, 0.6), 0px 0px 0px 1px rgba(255, 255, 255, 0.08);
    }
}

/* ========================================================
   2. RESET E TYPOGRAPHY (Ottimizzazione Leggibilità Editoriale)
   ======================================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    /* Stack di font ottimizzato per la massima leggibilità di testi lunghi (stile Medium/Apple) */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.75; /* Interlinea aumentata per riposare l'occhio */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Gestione barre di scorrimento invisibili coerente con index.html */
html, body {
    -ms-overflow-style: none;
    scrollbar-width: none;
}
::-webkit-scrollbar {
    display: none;
}

/* ========================================================
   3. COMPONENTI INTERFACCIA MATERIAL DESIGN 3
   ======================================================== */

/* Top App Bar */
.md-top-app-bar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(10, 10, 10, 0.7); /* Effetto vetrata traslucida del portfolio */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--md-sys-color-on-surface);
    display: flex;
    align-items: center;
    padding: 14px 24px;
    border-bottom: 1px solid var(--md-sys-color-outline);
    transition: background-color 0.3s, border-color 0.3s;
}

@media (prefers-color-scheme: light) {
    .md-top-app-bar {
        background-color: rgba(250, 250, 250, 0.8);
    }
}

/* Icon Button (Tasto Back con transizioni curve Material/Apple) */
.md-icon-button {
    background: none;
    border: none;
    color: var(--md-sys-color-on-surface);
    padding: 10px;
    margin-right: 16px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.25s cubic-bezier(0.4, 0, 0.2, 1), color 0.25s;
}

.md-icon-button:hover {
    background-color: rgba(255, 255, 255, 0.08);
}
@media (prefers-color-scheme: light) {
    .md-icon-button:hover {
        background-color: rgba(0, 0, 0, 0.06);
    }
}

.md-icon-button svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.md-title {
    font-size: 20px;
    font-weight: 500;
    letter-spacing: -0.01em;
    flex-grow: 1;
    margin: 0;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
}

/* Contenitore Principale e Struttura Card (Larghezza massima aumentata per desktop) */
.md-main-container {
    max-width: 1400px; /* RICHIESTA: Aumentata da 800px a 960px per dare più respiro su schermi grandi */
    margin: 40px auto;
    padding: 0 24px;
}

.md-article-card {
    background-color: var(--md-sys-color-surface-level1); /* Stesso layer bento box */
    border-radius: 24px; /* Forme curve morbide coerenti */
    padding: 64px; /* Più spazio interno proporzionato alla nuova larghezza */
    border: 1px solid var(--md-sys-color-outline);
    box-shadow: var(--md-elevation-1);
}

/* Responsive adattivo: su smartphone la card collassa a schermo intero eliminando i doppi bordi */
@media (max-width: 768px) {
    .md-main-container {
        margin: 0;
        padding: 0;
    }
    .md-article-card {
        border-radius: 0;
        border-left: none;
        border-right: none;
        border-top: none;
        box-shadow: none;
        padding: 36px 20px;
    }
}

/* ========================================================
   4. SEZIONE GRID E CARDS (Per l'indice projects.php)
   ======================================================== */
.md-project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 32px;
    padding: 40px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.md-card {
    background-color: var(--md-sys-color-surface-level1);
    border-radius: 20px;
    border: 1px solid var(--md-sys-color-outline);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: border-color 0.3s ease, transform 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    will-change: transform;
}

.md-card:hover {
    transform: translateY(-6px);
    border-color: rgba(41, 151, 255, 0.3); /* Leggero bagliore blu all'hover */
}

.md-card-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-bottom: 1px solid var(--md-sys-color-outline);
    background-color: var(--md-sys-color-surface-variant);
    filter: grayscale(10%) contrast(105%);
    transition: filter 0.3s;
}

.md-card:hover .md-card-img {
    filter: grayscale(0%) contrast(100%);
}

.md-card-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex-grow: 1;
}

.md-card-title {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0;
    color: #ffffff;
}
@media (prefers-color-scheme: light) {
    .md-card-title { color: var(--md-sys-color-on-surface); }
}

.md-card-desc {
    font-size: 14.5px;
    color: var(--md-sys-color-on-surface-variant);
    margin: 0;
    line-height: 1.6;
}

/* ========================================================
   5. PARSING COMPONENTI INTERNI MARKDOWN (Tipografia HD)
   ======================================================== */
.md-content h1 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.25;
    margin-top: 0;
    margin-bottom: 20px;
    color: #ffffff;
}
@media (prefers-color-scheme: light) {
    .md-content h1 { color: var(--md-sys-color-on-surface); }
}

/* Paragrafo introduttivo (Lead Paragraph) - Più nitido e contrastato */
.md-content > p:first-of-type {
    font-size: 1.25rem;
    line-height: 1.7;
    color: #ffffff; /* Bianco pieno per risaltare al massimo */
    font-weight: 400;
    margin-bottom: 44px;
}
@media (prefers-color-scheme: light) {
    .md-content > p:first-of-type { color: #1c1c1e; }
}

.md-content h2 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-top: 52px;
    margin-bottom: 20px;
    color: #ffffff;
}
@media (prefers-color-scheme: light) {
    .md-content h2 { color: var(--md-sys-color-on-surface); }
}

.md-content h3 {
    font-size: 21px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-top: 36px;
    margin-bottom: 14px;
}

/* RICHIESTA: Ottimizzazione leggibilità corpo del testo */
.md-content p, .md-content li {
    font-size: 16.5px; /* Dimensione aumentata a standard editoriale HD */
    line-height: 1.75;  /* Interlinea spaziosa per evitare affaticamento visivo */
    letter-spacing: 0.1px; /* Spaziatura micro-ottimizzata per display digitali */
    color: #e2e2e6;    /* Grigio chiaro ad altissimo contrasto ma rilassante */
    margin-top: 0;
    margin-bottom: 24px;
}
@media (prefers-color-scheme: light) {
    .md-content p, .md-content li { color: #2c2c2e; }
}

.md-content a {
    color: var(--md-sys-color-primary);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px dashed transparent;
    transition: border-color 0.2s;
}
.md-content a:hover {
    border-bottom-color: var(--md-sys-color-primary);
}

/* Elenchi puntati / ordinati tecnici */
.md-content ul, .md-content ol {
    margin-top: 0;
    margin-bottom: 28px;
    padding-left: 24px;
}

.md-content li {
    margin-bottom: 12px;
}

.md-content li strong {
    color: #ffffff;
}
@media (prefers-color-scheme: light) {
    .md-content li strong { color: #000000; }
}

/* Citazioni Morbide e Avvisi (Blockquote di impatto con l'arancione hardware) */
.md-content blockquote {
    margin: 44px 0;
    padding: 24px 28px;
    border-left: 4px solid var(--md-sys-color-secondary); /* Arancione Hardware */
    background-color: rgba(255, 159, 10, 0.05);          /* Tinta leggera di avviso */
    color: #ffffff;
    border-radius: 0 16px 16px 0;
    font-style: italic;
}
@media (prefers-color-scheme: light) {
    .md-content blockquote {
        color: #1c1c1e;
        background-color: rgba(255, 159, 10, 0.08);
    }
}

/* Blocchi di Codice Avanzati (Piste verdi ed estetica IDE hacker) */
.md-content pre {
    background-color: var(--md-sys-color-surface-variant);
    border: 1px solid var(--md-sys-color-outline);
    padding: 22px 26px;
    border-radius: 16px;
    overflow-x: auto;
    margin: 36px 0;
}

.md-content pre code {
    font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
    font-size: 14.5px;
    color: #43c98a; /* Verde brillante delle piste PCB */
    line-height: 1.6;
    background-color: transparent;
    padding: 0;
    border-radius: 0;
}

/* Codice Inline (nel testo) */
.md-content code {
    background-color: var(--md-sys-color-surface-variant);
    color: #43c98a;
    padding: 3px 8px;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, monospace;
    font-size: 14px;
    border: 1px solid var(--md-sys-color-outline);
}

/* Immagini e Figure Responsive */
.md-content img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
    border: 1px solid var(--md-sys-color-outline);
    margin: 48px auto 14px auto;
}

/* Didascalia automatica del testo in corsivo sotto l'immagine */
.md-content img + em {
    display: block;
    text-align: center;
    font-size: 13.5px;
    color: var(--md-sys-color-on-surface-variant);
    font-style: normal;
    margin-bottom: 48px;
}

/* Tabelle di Specifiche Tecniche (Ingegneristiche) */
.md-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 36px 0;
    font-size: 15px;
}

.md-content th, .md-content td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--md-sys-color-outline);
}

.md-content th {
    font-weight: 600;
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.02);
}
@media (prefers-color-scheme: light) {
    .md-content th {
        color: #000000;
        background-color: rgba(0, 0, 0, 0.02);
    }
}

.md-content td {
    color: var(--md-sys-color-on-background);
}

/* Gestione evidenziazione del testo pericoloso o Safety Notices */
.md-content .text-danger, .md-content strong:contains("SAFETY"), .md-content strong:contains("IMPORTANT") {
    color: #ff453a !important; /* Rosso Apple/Material per allarmi critici */
}