/* VARIABILI GLOBALI (Tema Rigoroso / Logico / Austero) */
:root {
    --bg-color: #fcfcfc; /* Bianco carta Oxford */
    --text-color: #1a1a1a; /* Nero inchiostro */
    
    --primary: #1e293b; /* Grigio Ardesia Scuro */
    --secondary: #64748b; /* Grigio Matita */
    --accent: #7f1d1d; /* Rosso Borgogna (Rilegatura classica) */
    
    --dark-bg: #0f172a; /* Blu notte molto scuro per le sezioni scure */
    --card-bg: #ffffff;
    
    --font-title: 'EB Garamond', serif; /* Font accademico, classico */
    --font-main: 'EB Garamond', serif;
    --font-mono: 'Source Code Pro', monospace; /* Font per simboli logici e formule */
    
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

[data-theme="inverted"] {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    
    --primary: #cbd5e1;
    --secondary: #94a3b8;
    --accent: #ef4444; 
    
    --dark-bg: #020617;
    --card-bg: #1e293b;
}

/* RESET E BASE */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    font-size: 1.25rem;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

h1, h2, h3, h4 { font-family: var(--font-title); line-height: 1.2; margin-bottom: var(--spacing-sm); font-weight: 700; }
.font-mono { font-family: var(--font-mono); }
.font-serif { font-family: var(--font-main); }

.text-primary { color: var(--primary) !important; }
.text-accent { color: var(--accent) !important; }
.text-white { color: #f8fafc !important; }
.text-center { text-align: center; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.my-4 { margin-top: 2rem; margin-bottom: 2rem; }
.text-lg { font-size: 1.4rem; }
.opacity-80 { opacity: 0.8; }

a { color: var(--accent); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--primary); }

/* CONTENITORI E STILI CARD RIGOROSI */
.container { max-width: 1000px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 10; } /* Contenitore più stretto per saggistica */
.section-block { padding: var(--spacing-xl) 0; position: relative; }
.dark-bg { background-color: var(--dark-bg); color: #f8fafc; }

/* Design minimalista, bordi netti, niente ombre morbide */
.rigorous-card {
    background-color: var(--card-bg);
    border: 1px solid var(--text-color);
    padding: 2.5rem;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 6px 6px 0px rgba(0,0,0,0.1); /* Ombra dura offset */
}
[data-theme="inverted"] .rigorous-card {
    border-color: var(--primary);
    box-shadow: 6px 6px 0px rgba(255,255,255,0.1);
}
.rigorous-card.dark-card {
    background-color: transparent;
    border-color: rgba(255,255,255,0.2);
}

/* SFONDO LOGICO ASTRATTO (Simboli fluttuanti/fissi) */
.logic-bg { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 0; pointer-events: none; overflow: hidden; opacity: 0.05; }
[data-theme="inverted"] .logic-bg { opacity: 0.1; }
.symbol { position: absolute; font-family: var(--font-mono); font-size: 8rem; color: var(--text-color); font-weight: bold; }
.sym-1 { top: 10%; left: 10%; transform: rotate(15deg); }
.sym-2 { top: 60%; right: 15%; transform: rotate(-10deg); }
.sym-3 { bottom: 20%; left: 20%; transform: rotate(5deg); font-size: 12rem; }
.sym-4 { top: 30%; right: 30%; font-size: 6rem; }
.sym-5 { bottom: 10%; right: 40%; font-size: 10rem; }

/* HEADER */
.site-header { position: fixed; top: 0; width: 100%; padding: 1rem 2rem; background: var(--bg-color); border-bottom: 3px double var(--text-color); z-index: 100; transition: background 0.4s ease; }
[data-theme="inverted"] .site-header { border-bottom-color: var(--primary); }
.header-content { display: flex; justify-content: space-between; align-items: center; max-width: 1000px; margin: 0 auto; }
.logo { font-family: var(--font-title); font-size: 1.6rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; }
.logo span { font-style: italic; color: var(--accent); }

/* BOTTONI */
.btn, .btn-outline {
    display: inline-block; padding: 1rem 2rem; font-family: var(--font-mono); font-weight: 600; text-transform: uppercase; letter-spacing: 1px;
    cursor: pointer; transition: all 0.2s ease; border: 1px solid var(--text-color); font-size: 0.85rem; background: transparent; color: var(--text-color);
}
.btn-outline:hover { background: var(--text-color); color: var(--bg-color); }

.btn.primary { background: var(--text-color); color: var(--bg-color); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.secondary { background: transparent; }
.btn.secondary:hover { background: rgba(0,0,0,0.05); }

.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; }

/* BOX AUTORE ALTO */
.author-box-top { margin-top: 8rem; display: flex; justify-content: center; }
.author-box-inner { display: flex; align-items: center; padding: 1.5rem 2rem; }
.author-img-wrapper { margin-right: 2rem; }
#top-author-img { width: 90px; height: 90px; border-radius: 0; object-fit: cover; border: 2px solid var(--text-color); filter: grayscale(100%); }
.author-label { font-size: 0.9rem; letter-spacing: 1px; display: block; margin-bottom: 0.5rem; }
.author-box-text h2 { font-size: 1.8rem; margin: 0; font-variant: small-caps; }
.author-box-text p { font-size: 1.1rem; margin: 0; opacity: 0.8; font-style: italic; }

/* HERO SECTION */
.hero { min-height: 80vh; display: flex; align-items: center; padding-top: 2rem; }
.hero-layout { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 4rem; align-items: center; }

.badge { display: inline-block; padding: 0.2rem 0; border-bottom: 2px solid var(--accent); font-size: 0.9rem; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 1.5rem; }

.title { font-size: 4.5rem; line-height: 1.1; margin-bottom: 1.5rem; letter-spacing: -1px; }
.subtitle { font-size: 1.6rem; color: var(--secondary); margin-bottom: var(--spacing-md); font-style: italic; }
.intro { font-size: 1.3rem; line-height: 1.6; }

/* HERO IMMAGINE */
.hero-img-col { display: flex; justify-content: center; position: relative; }
.cover-showcase { position: relative; padding: 2rem; }
.hero-cover { width: 100%; max-width: 320px; display: block; filter: grayscale(50%); position: relative; z-index: 2; padding: 0; }
.axiom-frame { position: absolute; top: 1rem; left: 3rem; right: 1rem; bottom: 3rem; border: 1px dashed var(--accent); z-index: 1; pointer-events: none; }

/* COMMONS E GRID */
.section-title { font-size: 3.5rem; margin-bottom: var(--spacing-lg); text-align: center; border-bottom: 1px solid var(--primary); padding-bottom: 1rem; }
.dark-bg .section-title { border-bottom-color: rgba(255,255,255,0.2); }

.content-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.text-card { padding: 2rem; }
.card-icon { font-size: 2rem; margin-bottom: 1.5rem; color: var(--accent); font-weight: bold; border-bottom: 2px solid var(--text-color); display: inline-block; padding-bottom: 0.5rem; }
[data-theme="inverted"] .card-icon { border-bottom-color: var(--primary); }

/* LABORATORIO: PARADOSSO */
.paradox-workspace { padding: 4rem; max-width: 800px; margin: 0 auto; }
.paradox-text { font-size: 1.4rem; }
blockquote { border-left: 4px solid var(--accent); padding-left: 1rem; font-size: 1.2rem; background: rgba(0,0,0,0.02); padding: 1rem; }
[data-theme="inverted"] blockquote { background: rgba(255,255,255,0.05); }

.buttons-paradox { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.feedback-box { padding: 1.5rem; border: 1px dashed var(--accent); font-size: 1.1rem; }

/* CONCEPTS */
.concepts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.concept-card { padding: 2rem; border-left: 4px solid var(--primary); }
.concept-title { font-family: var(--font-mono); font-size: 1.2rem; color: var(--accent); margin-bottom: 1rem; font-weight: bold; }

/* NARRATIVE CON LOGIC TREE */
.narrative-container { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 5rem; align-items: center; }
.logic-tree { padding: 3rem; font-size: 1.2rem; background: var(--bg-color); color: var(--text-color); border: 2px solid var(--text-color); }
.tree-node { padding: 0.5rem; }
.tree-line { color: var(--secondary); opacity: 0.5; }

/* BIOGRAFIA ESTESA */
.bio-grid { display: grid; grid-template-columns: 1fr 2.5fr; gap: 4rem; align-items: center; }
.author-portrait-wrapper { position: relative; padding: 0; }
.bio-img-main { width: 100%; display: block; filter: grayscale(100%) contrast(1.2); }
.nobel-badge { position: absolute; bottom: -15px; right: -15px; background: var(--accent); color: #fff; padding: 0.5rem 1rem; font-family: var(--font-mono); font-size: 0.9rem; letter-spacing: 1px; border: 1px solid var(--bg-color); }

/* CONCLUSION */
.takeaways-profiles { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 3rem; margin-bottom: var(--spacing-xl); }
.takeaways { padding: 3rem; }
.check-list { list-style: none; }
.check-list li { position: relative; padding-left: 2rem; margin-bottom: 1rem; font-size: 1.2rem; }
.check-list li::before { content: '∴'; position: absolute; left: 0; color: var(--accent); font-family: var(--font-mono); font-size: 1.5rem; line-height: 1; }

.profiles { display: flex; flex-direction: column; gap: 1.5rem; }
.profile-card { padding: 2rem; }
.border-left-primary { border-left: 4px solid var(--primary); }
.border-left-accent { border-left: 4px solid var(--accent); }

.cta-box { padding: 4rem 2rem; }
.cta-box h2 { font-size: 3rem; border: none; margin-bottom: 1rem; }

/* FOOTER */
.site-footer { text-align: center; padding: 2rem; border-top: 3px double var(--text-color); font-size: 1rem; font-family: var(--font-mono); opacity: 0.8; }
[data-theme="inverted"] .site-footer { border-top-color: var(--primary); }

/* MEDIA QUERIES */
@media (max-width: 900px) {
    .hero-layout, .narrative-container, .bio-grid, .takeaways-profiles { grid-template-columns: 1fr; }
    .hero-img-col { order: -1; margin-bottom: 2rem; }
    .title { font-size: 3.5rem; }
    .logic-tree { width: 100%; max-width: 400px; margin: 0 auto; }
}
@media (max-width: 600px) {
    .title { font-size: 2.8rem; }
    .author-box-inner { flex-direction: column; text-align: center; }
    .author-img-wrapper { margin-right: 0; margin-bottom: 1rem; }
    .buttons-paradox { flex-direction: column; }
    .section-title { font-size: 2.5rem; }
}