body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0f0f0f;
    color: #e6e6e6;
}

header {
    text-align: center;
    padding: 40px 20px;
}

html, body {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

main {
    flex: 1;
}

.tool-list {
    display: flex;
    justify-content: center;
    margin: 40px;
    flex-wrap: wrap;
    gap: 20px;
}

.tool-card {
    background: #00410e;
    padding: 20px;
    border-radius: 10px;
    width: 250px;
    text-decoration: none;
    color: white;
    transition: 0.2s;
    border: 1px solid #222;
}

.tool-card:hover {
    background: #00861d;
    transform: translateY(-3px);
}

.copied {
    background: #006400 !important;
}

.shake {
    animation: shakeAnim 0.2s;
}

@keyframes shakeAnim {
    0% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    50% { transform: translateX(6px); }
    75% { transform: translateX(-6px); }
    100% { transform: translateX(0); }
}

/* === Footer === */
footer {
    width: 100%;
    text-align: center;
    padding: 15px 20px;
    background: linear-gradient(180deg, #1a1a1a, #333333);
    color: #aaa;
    font-size: 0.9em;
    border-top: 1px solid #555;
}