/* --- Variabili CSS --- */
:root {
    --primary-color: #0056b3; /* Cambia con il blu/colore della ASD */
    --text-main: #333333;
    --text-muted: #666666;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --radius: 12px;
}

/* --- Reset e Base --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* --- Header & Footer --- */
.header {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.header p {
    font-size: 1rem;
    opacity: 0.9;
}

.footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --- Layout Grid (Mobile First) --- */
.sponsors-grid {
    display: grid;
    grid-template-columns: 1fr; /* 1 colonna su mobile */
    gap: 1.5rem;
}

/* Media Query per Tablet e Desktop */
@media (min-width: 768px) {
    .sponsors-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); /* Responsive grid */
    }
}

/* --- Card Sponsor --- */
.sponsor-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
}

.sponsor-card:active {
    transform: scale(0.98); /* Feedback tattile su mobile */
}

.sponsor-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 3px solid var(--primary-color);
}

.sponsor-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.sponsor-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.sponsor-name {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.sponsor-discount {
    font-weight: 600;
    background-color: #eef5ff;
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.sponsor-btn {
    margin-top: auto;
    display: inline-block;
    text-align: center;
    background-color: var(--text-main);
    color: white;
    text-decoration: none;
    padding: 0.75rem;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.2s;
}

.sponsor-btn:hover {
    background-color: var(--primary-color);
}