/**
 * Stili globali del comparatore
 * Reset CSS, tipografia e variabili di sistema
 */

/* ========================================
   VARIABILI CSS - PALETTE COLORI
   ======================================== */
:root {
    /* Colori primari del brand */
    --eni-yellow: #FFCD00;           /* ENI YELLOW */
    --light-green: #95B849;          /* LIGHT GREEN */
    --dark-green: #009E62;           /* DARK GREEN */
    
    /* Colori neutri */
    --default-grey: #333333;         /* DEFAULT GREY */
    --dark-grey: #444444;            /* DARK GREY */
    --white: #FFFFFF;                /* WHITE */
    
    /* Alias per compatibilità */
    --brand-yellow: #FFCD00;
    --brand-green-light: #95B849;
    --brand-green: #009E62;
    --brand-green-dark: #009E62;
    --neutral-black: #333333;        /* DEFAULT GREY per testi */
    --neutral-gray-dark: #444444;    /* DARK GREY */
    --neutral-gray-medium: #666666;
    --neutral-gray-light: #F5F5F5;
    --neutral-white: #FFFFFF;
    
    /* Stati interattivi */
    --cta-hover: #008755;            /* Versione più scura di dark-green */
    --cta-focus: #007A4D;
    
    /* Tipografia */
    --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spaziature moderne */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Bordi arrotondati moderni */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Ombre moderne */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Transizioni */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--default-grey);
    background-color: var(--white);
    overflow-x: hidden;
    padding-top: 50px; /* Compensa la navbar fissa */
}

/* ========================================
   TIPOGRAFIA
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    /* Evitare italic per testi principali */
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
    margin-bottom: var(--spacing-sm);
}

strong {
    font-weight: 600;
}

/* ========================================
   CONTAINER & LAYOUT
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-wide {
    max-width: 1400px;
}

.container-narrow {
    max-width: 900px;
}

/* ========================================
   CTA & BUTTONS
   ======================================== */
.cta-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--white);
    background-color: var(--dark-green);  /* Usa il colore esatto della palette */
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    /* Dimensioni accessibili come da Guidelines */
    min-height: 48px;
    min-width: 160px;
}

.cta-primary:hover {
    background-color: var(--cta-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.cta-primary:focus {
    outline: 3px solid var(--eni-yellow);  /* Usa il giallo esatto della palette */
    outline-offset: 2px;
    background-color: var(--cta-focus);
}

.cta-primary:active {
    transform: translateY(0);
}

.cta-secondary {
    background-color: var(--white);
    color: var(--dark-green);
    border: 2px solid var(--dark-green);
}

.cta-secondary:hover {
    background-color: var(--dark-green);
    color: var(--white);
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.card-minimal {
    border: 1px solid var(--neutral-gray-light);
    box-shadow: none;
}

/* ========================================
   LEGAL BAND
   ======================================== */
.legal-band {
    background-color: var(--neutral-gray-light);
    color: var(--default-grey);  /* Usa il grigio esatto della palette */
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    line-height: 1.5;
    /* Contrasto alto come da Guidelines pag. 20 */
}

.legal-band a {
    color: var(--dark-green);
    text-decoration: underline;
    font-weight: 500;
}

.legal-band a:hover {
    color: var(--cta-hover);
}

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

.intro-section {
    text-align: center !important;
}

.intro-section .container,
.intro-section .container-narrow {
    text-align: center !important;
    margin: 0 auto !important;
    display: block !important;
}

.intro-section h2 {
    text-align: center !important;
    margin: 0 auto var(--spacing-md) auto !important;
    width: 100% !important;
    display: block !important;
}

.intro-section .subtitle {
    text-align: center !important;
    margin: 0 auto !important;
    max-width: 600px !important;
    width: 100% !important;
    display: block !important;
}

.text-brand {
    color: var(--dark-green);
}

.bg-light {
    background-color: var(--neutral-gray-light);
}

.bg-gradient {
    background: linear-gradient(135deg, var(--light-green) 0%, var(--dark-green) 100%);
}

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-xl { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }

/* ========================================
   FOCUS MANAGEMENT (Accessibilità)
   ======================================== */
:focus-visible {
    outline: 3px solid var(--brand-yellow);
    outline-offset: 2px;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }
    
    .cta-primary {
        width: 100%;
    }
}

/* ========================================
   PREVENZIONE ELEMENTI VIETATI
   ======================================== */
/* Nessuna dominante nera come da Guidelines pag. 4 */
.forbidden-black-dominant {
    /* Questo stile non deve essere usato */
    background-color: red !important;
    border: 5px solid red !important;
}