.input-group {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid #eee;
    border-radius: 5px;
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.input-group label {
    display: inline-block;
    margin-right: 10px;
    min-width: 65px;
    vertical-align: middle;
    color: #555;
    font-weight: 500;
}

.input-group select,
.input-group input[type="number"] {
    padding: 8px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-right: 5px;
    vertical-align: middle;
    background-color: #f8f9fa;
}

.input-group input[type="number"] {
    width: 70px;
}

.input-notes {
    font-size: 0.85em;
    color: #666;
    background-color: #f9f9f9;
    padding: 10px 15px;
    border: 1px solid #eee;
    border-radius: 4px;
    margin-bottom: 20px;
}
.input-notes p {
    margin: 0 0 5px 0;
    font-weight: 500;
}
.input-notes ul {
    margin: 0;
    padding-left: 20px;
    list-style: disc;
}
.input-notes li {
    margin-bottom: 3px;
}

button#calculateButton {
    display: block;
    width: 100%;
    padding: 12px 20px;
    font-size: 1.1em;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-bottom: 20px;
}

button#calculateButton:hover {
    background-color: #0056b3;
}
.result-container {
    background-color: #fff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}
.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.result-header h3 {
    margin: 0;
    color: #0056b3;
    font-size: 1.3em;
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-buttons button {
    height: 32px;
    padding: 5px 10px;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
    position: relative;
    gap: 5px;
    line-height: 1;
}

.header-buttons button svg {
    width: 18px;
    height: 18px;
    fill: white;
}

.header-buttons button span:not(.copy-tooltip) {
    font-size: 0.9em;
}

button#copyBtn {
    background-color: #6c757d;
}

button#copyBtn:hover {
    background-color: #5a6268;
}

button#copyBtn .copy-tooltip {
    visibility: hidden;
    width: 80px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    position: absolute;
    z-index: 1;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s, visibility 0.3s, background-color 0.3s;
    font-size: 0.8em;
    white-space: nowrap;
    pointer-events: none;
}

button#copyBtn.copied .copy-tooltip {
    visibility: visible;
    opacity: 1;
    background-color: #28a745;
}

button#copyBtn[data-copy-state="error"] .copy-tooltip {
    visibility: visible;
    opacity: 1;
    background-color: #dc3545;
}


button#resetBtn {
    background-color: #dc3545;
}

button#resetBtn:hover {
    background-color: #c82333;
}

textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: monospace;
    background-color: #e9ecef;
    resize: vertical;
    min-height: 550px;
    line-height: 1.5;
    font-size: 0.95em;
}

@media (max-width: 600px) {
    .result-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .header-buttons {
        align-self: flex-end;
    }
    textarea {
        min-height: 300px;
    }
}