/* ============================================
   BIOTECH CSS - VERSIONE MIGLIORATA
   ============================================ */

/* CSS Custom Properties per consistenza */
:root {
    --primary-color: #000000;
    --secondary-color: #f0f0f0;
    --accent-color: #FB2B54;
    --accent-secondary: #00ABAD;
    --text-primary: #000000;
    --text-secondary: #333333;
    --text-light: #666666;
    --border-color: #000000;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --transition-fast: 0.2s ease-out;
    --transition-medium: 0.3s ease;
    --border-radius: 4px;
    --max-width: 1000px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* Reset e base */
* {
    box-sizing: border-box;
}

body {
    background-color: var(--secondary-color);
    color: var(--text-primary);
    font-family: 'Century Gothic', 'Futura', 'Trebuchet MS', sans-serif;
    margin: 0;
    padding: var(--spacing-md);
    line-height: 1.6;
    text-align: left;
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: 80px;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Tipografia migliorata */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    margin: 0 0 var(--spacing-md) 0;
    padding: 0;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
    letter-spacing: -0.04em;
}

h2 {
    font-size: 2rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

h3 {
    font-size: 1.5rem;
    margin-top: var(--spacing-lg);
    color: var(--text-secondary);
}

h4 {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

p {
    color: var(--text-primary);
    margin: 0 0 var(--spacing-md) 0;
    padding: 0;
    text-align: justify;
    font-size: 1rem;
    line-height: 1.7;
}

/* Link migliorati */
a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition-fast);
    border-bottom: 1px solid transparent;
}

a:hover {
    color: var(--text-primary);
    border-bottom-color: var(--accent-color);
}

a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Navigazione migliorata */
.nav {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(240, 240, 240, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-md) var(--spacing-lg);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: auto;
    z-index: 1000;
    font-family: inherit;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px var(--shadow-light);
}

.nav .brand {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: lowercase;
    letter-spacing: -0.02em;
}

.nav .links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav a {
    position: relative;
    text-decoration: none;
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    border-radius: var(--border-radius);
}

.nav a:hover {
    color: var(--accent-color);
    background-color: rgba(251, 43, 84, 0.05);
    border-bottom: none;
}

.nav a.active {
    color: var(--accent-color);
    font-weight: 600;
    background-color: rgba(251, 43, 84, 0.1);
}

/* Tooltip migliorati */
.nav a::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background-color: var(--text-primary);
    color: var(--secondary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    border-radius: var(--border-radius);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    white-space: nowrap;
    z-index: 1001;
    pointer-events: none;
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.nav a:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Bottoni migliorati */
button, .btn {
    border: 2px solid var(--border-color);
    background-color: var(--secondary-color);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--border-radius);
    outline: none;
    transition: var(--transition-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-block;
    text-decoration: none;
}

button:hover, .btn:hover {
    background-color: var(--text-primary);
    color: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

button:active, .btn:active {
    transform: translateY(0);
}

button:focus, .btn:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Bottone primario */
.btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: #d91e43;
    border-color: #d91e43;
    color: white;
}

/* Container migliorato */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* Sezioni */
.section {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg) 0;
}

.section-alt {
    background-color: rgba(251, 43, 84, 0.02);
    margin-left: -var(--spacing-md);
    margin-right: -var(--spacing-md);
    padding: var(--spacing-xl) var(--spacing-md);
    border-left: 4px solid var(--accent-color);
}

/* Divisori migliorati */
hr, .divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: var(--spacing-xl) 0;
    opacity: 0.3;
}

hr.full-width {
    margin-left: -9999px;
    margin-right: -9999px;
    width: calc(100% + 20000px);
}

/* Sezione bio con stile migliorato */
#bio p {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* Card per contenuti */
.card {
    background-color: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin: var(--spacing-md) 0;
    box-shadow: 0 2px 8px var(--shadow-light);
    transition: var(--transition-medium);
}

.card:hover {
    box-shadow: 0 4px 16px var(--shadow-medium);
    transform: translateY(-2px);
}

/* Footer migliorato */
footer {
    background: linear-gradient(135deg, var(--accent-color) 0%, #d91e43 100%);
    color: white;
    text-align: center;
    padding: var(--spacing-lg);
    position: relative;
    margin-top: var(--spacing-xl);
    font-size: 0.9rem;
}

footer a {
    color: var(--accent-secondary);
    border-bottom-color: transparent;
}

footer a:hover {
    color: white;
    border-bottom-color: white;
}

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-small { font-size: 0.85rem; }
.text-large { font-size: 1.1rem; }
.text-light { color: var(--text-light); }
.text-secondary { color: var(--text-secondary); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* Media queries responsive */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-sm);
        padding-top: 70px;
        font-size: 15px;
    }

    .nav {
        flex-direction: column;
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
    }

    .nav .links {
        gap: var(--spacing-md);
        margin-top: var(--spacing-xs);
    }

    .nav a {
        font-size: 0.85rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .container {
        padding: var(--spacing-sm);
    }

    .section-alt {
        margin-left: -var(--spacing-sm);
        margin-right: -var(--spacing-sm);
        padding: var(--spacing-lg) var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    body {
        font-size: 14px;
        padding: var(--spacing-xs);
        padding-top: 60px;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .nav {
        padding: var(--spacing-xs);
    }

    .nav .links {
        flex-wrap: wrap;
        justify-content: center;
    }

    button, .btn {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }

    .card {
        padding: var(--spacing-md);
    }
}

/* Animazioni e microinterazioni */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Focus accessibilità */
*:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .nav, footer {
        display: none;
    }
    
    body {
        padding-top: 0;
        color: black;
        background: white;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}