/* VARIABILI GLOBALI (Tema Filosofico / Quantistico) */
:root {
    --bg-color: #0a0a0a; /* Nero profondo */
    --text-color: #e5e5e5; /* Grigio chiaro (cenere) */
    
    --primary: #8ba2b5; /* Grigio-blu industriale pallido */
    --secondary: #4b5563; /* Grigio medio */
    --accent: #d1d5db; /* Grigio argento / luce */
    
    --dark-bg: #000000; 
    --card-bg: rgba(25, 25, 25, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    
    --font-title: 'Playfair Display', serif; /* Font per la filosofia e la narrazione alta */
    --font-main: 'Playfair Display', serif; 
    --font-mono: 'Roboto Mono', monospace; /* Font per la fisica e il calcolo */
    
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

/* Modalità "Classica" (Chiara, definita) */
[data-theme="classical"] {
    --bg-color: #f3f4f6;
    --text-color: #111827;
    
    --primary: #1e3a8a; /* Blu scuro classico */
    --secondary: #9ca3af;
    --accent: #b91c1c; /* Rosso mattone (determinismo) */
    
    --dark-bg: #e5e7eb;
    --card-bg: rgba(255, 255, 255, 0.9);
    --border-color: rgba(0, 0, 0, 0.1);
}

/* 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: 1.8;
    font-size: 1.15rem;
    overflow-x: hidden;
    transition: background-color 0.8s ease, color 0.8s 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: var(--text-color) !important; }
.text-center { text-align: center; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.text-sm { font-size: 0.9rem; }
.opacity-80 { opacity: 0.8; }

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

/* CONTENITORI */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 10; }
.section-block { padding: var(--spacing-xl) 0; position: relative; }
.dark-bg { background-color: var(--dark-bg); color: var(--text-color); }

/* EFFETTO VETRO E BORDI */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 4px; /* Angoli netti per un look formale */
}
.glass-border { border: 1px solid var(--border-color); }
.border-left-primary { border-left: 4px solid var(--primary); }
.border-left-accent { border-left: 4px solid var(--accent); }

/* SFONDO DINAMICO QUANTISTICO (Canvas) */
.quantum-bg { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 0; pointer-events: none; opacity: 0.5; }
[data-theme="classical"] .quantum-bg { opacity: 0.1; }

/* HEADER */
.site-header { position: fixed; top: 0; width: 100%; padding: 1rem 2rem; background: rgba(10, 10, 10, 0.8); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); z-index: 100; transition: background 0.8s ease; }
[data-theme="classical"] .site-header { background: rgba(243, 244, 246, 0.9); }
.header-content { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; }
.logo { font-family: var(--font-title); font-size: 1.5rem; letter-spacing: 2px; }
.logo span { font-style: italic; color: var(--primary); }

/* BOTTONI */
.btn, .btn-outline {
    display: inline-block; padding: 1rem 2rem; font-family: var(--font-mono); font-weight: 400; text-transform: uppercase; letter-spacing: 1px;
    border-radius: 2px; cursor: pointer; transition: all 0.4s ease; border: none; font-size: 0.9rem;
}
.btn-outline { background: transparent; border: 1px solid var(--text-color); color: var(--text-color); }
.btn-outline:hover { background: var(--text-color); color: var(--bg-color); }

.btn.primary { background: var(--primary); color: var(--bg-color); font-weight: 700; }
.btn.primary:hover { background: var(--accent); transform: scale(1.02); }
.btn.secondary { background: transparent; color: var(--text-color); border: 1px solid var(--primary); }
.btn.secondary:hover { background: var(--primary); color: var(--bg-color); }

.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 3rem; }
.author-img-wrapper { margin-right: 2rem; }
#top-author-img { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; border: 2px solid var(--primary); filter: grayscale(100%) contrast(1.2); }
.author-label { font-size: 0.85rem; letter-spacing: 2px; display: block; margin-bottom: 0.5rem; }
.author-box-text h2 { font-size: 1.8rem; margin: 0; font-style: italic; }
.author-box-text p { font-size: 1rem; margin: 0; opacity: 0.7; font-family: var(--font-main); }

/* 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: 0.3rem 1rem; border: 1px solid var(--accent); color: var(--accent); font-size: 0.8rem; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 1.5rem; }

.title { font-size: 5.5rem; line-height: 1; letter-spacing: -1px; margin-bottom: 1.5rem; font-style: italic; }
[data-theme="classical"] .title { font-style: normal; }
.subtitle { font-size: 1.5rem; color: var(--primary); margin-bottom: 2rem; font-family: var(--font-mono); }
.intro { font-size: 1.2rem; line-height: 1.8; color: var(--text-color); opacity: 0.9; }

/* HERO IMMAGINE E NUVOLA PROBABILITA */
.hero-img-col { display: flex; justify-content: center; position: relative; }
.cover-showcase { position: relative; padding: 2rem; display: flex; justify-content: center; align-items: center; }
.hero-cover { width: 100%; max-width: 300px; position: relative; z-index: 3; filter: grayscale(80%); transition: filter 1s; }
.hero-cover:hover { filter: grayscale(0%); }

.probability-cloud { position: absolute; background: radial-gradient(circle, var(--primary) 0%, transparent 70%); border-radius: 50%; filter: blur(30px); opacity: 0.3; z-index: 1; mix-blend-mode: screen; animation: floatCloud 8s infinite alternate ease-in-out; }
.cloud-1 { width: 250px; height: 250px; top: 0; left: 0; }
.cloud-2 { width: 300px; height: 300px; bottom: -50px; right: -50px; animation-delay: -4s; background: radial-gradient(circle, var(--secondary) 0%, transparent 70%); }
[data-theme="classical"] .probability-cloud { display: none; }

@keyframes floatCloud { 0% { transform: translate(0, 0) scale(1); } 100% { transform: translate(30px, -30px) scale(1.2); } }

/* COMMONS E GRID */
.section-title { font-size: 3rem; margin-bottom: var(--spacing-lg); font-style: italic; }
.content-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.text-card { padding: 3rem; transition: transform 0.4s, border-color 0.4s; }
.text-card:hover { transform: translateY(-5px); border-left-color: var(--text-color); }
.card-icon { font-size: 2.5rem; margin-bottom: 1.5rem; filter: grayscale(100%); opacity: 0.8; }
.text-card h3 { font-size: 1.8rem; }

/* LABORATORIO INDETERMINAZIONE */
.uncertainty-workspace { padding: 3rem; display: grid; grid-template-columns: 1fr; gap: 2rem; }
.wave-particle-area { width: 100%; display: flex; justify-content: center; border: 1px solid var(--border-color); padding: 1rem; background: var(--dark-bg); }
#uncertainty-canvas { max-width: 100%; height: auto; }

.slider-container { margin-top: 2rem; }
.slider-container input { width: 100%; margin-top: 1rem; cursor: crosshair; }
.feedback-box { padding: 1rem; background: rgba(0,0,0,0.5); border-left: 2px solid var(--primary); }
[data-theme="classical"] .feedback-box { background: rgba(255,255,255,0.5); }

/* CONCEPTS */
.concepts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.concept-card { padding: 2rem; border-top: 1px solid var(--border-color); transition: background 0.3s; }
.concept-title { font-family: var(--font-mono); font-size: 1.2rem; color: var(--primary); margin-bottom: 1rem; border-bottom: 1px dashed var(--border-color); padding-bottom: 0.5rem; }

/* NARRATIVE CON DIAGRAMMA COPENAGHEN */
.narrative-container { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.copenhagen-diagram { padding: 3rem; display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.eye { font-size: 3rem; filter: grayscale(1); }
.arrow { font-family: var(--font-mono); font-size: 0.9rem; color: var(--accent); }
.wave-collapse { font-family: var(--font-mono); font-size: 2rem; display: flex; align-items: center; gap: 1rem; }
.collapse-icon { font-size: 2.5rem; }

/* INTERATTIVO SECONDARIO (Linguaggio) */
.language-game { padding: 4rem; max-width: 700px; margin: 0 auto; }
.superposition-box { height: 150px; display: flex; justify-content: center; align-items: center; position: relative; }
.state-a, .state-b { font-size: 4rem; font-family: var(--font-mono); position: absolute; opacity: 0.5; filter: blur(5px); transition: all 0.5s; }
.state-a { color: var(--primary); transform: translateX(-30px); }
.state-b { color: var(--accent); transform: translateX(30px); }

/* BIOGRAFIA ESTESA */
.bio-grid { display: grid; grid-template-columns: 1.2fr 2.8fr; gap: 4rem; align-items: center; }
.author-portrait-wrapper { position: relative; padding: 0; overflow: hidden; }
.bio-img-main { width: 100%; display: block; filter: grayscale(100%); }
.portrait-overlay-grid { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-image: linear-gradient(var(--border-color) 1px, transparent 1px), linear-gradient(90deg, var(--border-color) 1px, transparent 1px); background-size: 20px 20px; opacity: 0.3; pointer-events: none; }

/* CONCLUSION */
.takeaways-profiles { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-bottom: var(--spacing-xl); }
.takeaways { padding: 3rem; }
.check-list { list-style: none; }
.check-list li { position: relative; padding-left: 1.5rem; margin-bottom: 1rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }
.check-list li::before { content: '-'; position: absolute; left: 0; color: var(--primary); font-family: var(--font-mono); }

.profiles { display: flex; flex-direction: column; gap: 1.5rem; }
.profile-card { padding: 2rem; }

.cta-box { padding: 4rem 2rem; border: 1px solid var(--border-color); }

/* FOOTER */
.site-footer { text-align: center; padding: 2rem; border-top: 1px solid var(--border-color); font-size: 0.9rem; font-family: var(--font-mono); opacity: 0.6; }

/* 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: 4rem; }
}
@media (max-width: 600px) {
    .title { font-size: 3rem; }
    .author-box-inner { flex-direction: column; text-align: center; }
    .author-img-wrapper { margin-right: 0; margin-bottom: 1rem; }
    .game-controls { display: flex; flex-direction: column; }
}