:root {
    --whatsapp-green: #25D366;
    --whatsapp-light: #dcf8c6;
    --whatsapp-dark: #075E54;
    --whatsapp-gray: #ece5dd;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
}

body {
    background-color: #f0f0f0;
    color: #333;
    line-height: 1.6;
}

header {
    background-color: var(--whatsapp-green);
    color: white;
    padding: 15px 20px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 500;
}

.search-container {
    padding: 15px;
    background-color: white;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

#search {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 20px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

#search:focus {
    border-color: var(--whatsapp-green);
}

.messages-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
    padding: 15px;
}

.message-card {
    background-color: white;
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    border-left: 4px solid var(--whatsapp-green);
}

.message-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.message-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--whatsapp-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.message-content {
    color: #555;
    font-size: 0.9rem;
    max-height: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
}

.copy-btn {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background-color: var(--whatsapp-green);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.3s;
}

.copy-btn:hover {
    background-color: var(--whatsapp-dark);
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--whatsapp-dark);
    color: white;
    padding: 12px 20px;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s;
}

.toast.show {
    opacity: 1;
}

footer {
    text-align: center;
    padding: 15px;
    color: #777;
    font-size: 0.9rem;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .messages-container {
        grid-template-columns: 1fr;
    }
}

/* Elemento nascosto per la copia */
#tempTextarea {
    position: absolute;
    left: -9999px;
    opacity: 0;
}