/* ==========================================================================
   1. VARIABILI E RESET (Palette Architetturale e Minimale)
   ========================================================================== */
:root {
    /* Palette Colori */
    --bg-app: #F8FAFC;         /* Grigio chiarissimo per lo sfondo */
    --bg-card: #FFFFFF;        /* Bianco puro per i moduli */
    --text-main: #0F172A;      /* Quasi nero per massima leggibilità */
    --text-muted: #64748B;     /* Grigio per le label */
    --border-color: #E2E8F0;
    --accent-blue: #3B82F6;    /* Colore di focus per gli input */
    
    /* Variabili Tipografiche e Spaziatura */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --radius-card: 16px;
    --radius-input: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-sticky: 0 -10px 25px -5px rgba(0,0,0,0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-app);
    color: var(--text-main);
    /* Lascia spazio in basso su mobile per non coprire le card con la Scorecard fissa */
    padding-bottom: 120px; 
}

/* ==========================================================================
   2. STICKY SCORECARD (La Barra dei KPI in tempo reale)
   ========================================================================== */
.sticky-scorecard {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--text-main); /* Sfondo scuro per contrasto netto */
    color: #FFFFFF;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 16px 8px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom)); /* Supporto per la notch di iPhone */
    box-shadow: var(--shadow-sticky);
    z-index: 1000;
}

.kpi {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.kpi .label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #94A3B8;
    margin-bottom: 4px;
}

.kpi .value {
    font-size: 1.25rem;
    font-weight: 700;
    transition: color 0.3s ease; /* Transizione morbida quando cambia il semaforo */
}

/* ==========================================================================
   3. STRUTTURA A CARD (L'Area di Input)
   ========================================================================== */
.input-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

.card {
    background-color: var(--bg-card);
    border-radius: var(--radius-card);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.card h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

/* ==========================================================================
   4. FORM E INPUT (Ottimizzati per il tocco)
   ========================================================================== */
.input-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.input-group:last-child {
    margin-bottom: 0;
}

.input-group label {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    flex: 1;
    padding-right: 15px;
}

.input-group input {
    width: 120px;
    padding: 10px 12px;
    font-size: 1rem;
    font-weight: 600;
    text-align: right;
    color: var(--text-main);
    background-color: var(--bg-app);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-input);
    transition: all 0.2s ease;
    /* Impedisce lo zoom fastidioso su iOS quando si tocca l'input */
    font-size: 16px; 
}

.input-group input:focus {
    outline: none;
    background-color: var(--bg-card);
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* Nasconde le freccette di default dei campi numerici per maggiore pulizia */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
    -webkit-appearance: none; 
    margin: 0; 
}
input[type=number] {
    -moz-appearance: textfield;
}

/* ==========================================================================
   5. RESPONSIVE DESIGN (Tablet & Desktop)
   ========================================================================== */
@media (min-width: 768px) {
    body {
        /* Su desktop la scorecard passa in alto */
        padding-bottom: 0;
        padding-top: 100px;
    }
    
    .sticky-scorecard {
        top: 0;
        bottom: auto;
        padding: 20px;
    }

    .kpi .value {
        font-size: 1.5rem;
    }

    .card {
        padding: 30px;
        box-shadow: var(--shadow-md);
    }
}

/* ==========================================================================
   6. ACCORDION (Fisarmonica per Mobile)
   ========================================================================== */
.card h2 {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: margin 0.3s ease, padding 0.3s ease;
    /* Impedisce la selezione accidentale del testo su mobile al doppio tocco */
    user-select: none; 
}

.toggle-icon {
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

/* Stato Chiuso */
.card.collapsed .input-group {
    display: none; /* Nasconde gli input */
}

.card.collapsed h2 {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.card.collapsed .toggle-icon {
    transform: rotate(-90deg); /* Ruota la freccia indicando che è chiuso */
}

/* Stile per la card dell'Oracolo quando la quota è esaurita */
.card-disabled {
    opacity: 0.55;
    filter: grayscale(40%);
    position: relative;
}

.card-disabled button {
    background-color: #94A3B8 !important;
    cursor: not-allowed !important;
    box-shadow: none !important;
}

/* Nasconde il marcatore nativo del browser */
summary::-webkit-details-marker,
summary::marker {
    display: none;
}

/* Ruota la freccina verso destra quando la scheda è chiusa */
details:not([open]) .arrow-icon {
    transform: rotate(-90deg);
}

/* ==========================================================================
   7. MONETIZZAZIONE E BOTTONI
   ========================================================================== */
.monetization-area {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.btn-premium {
    background-color: var(--text-main);
    color: #FFFFFF;
    border: none;
    border-radius: var(--radius-input);
    padding: 16px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

.btn-premium:active {
    transform: scale(0.98);
}

.affiliate-links {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-donate {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.link-affiliate {
    color: var(--accent-blue);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}