:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --border-color: #d1d5db;
    --bg-color: #f9fafb;
    --readonly-bg: #e5e7eb;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: #f3f4f6;
    color: #1f2937;
    padding: 1rem;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

a {
    text-decoration: none;
}

.mono-space {
    font-family: ui-monospace, monospace;
}

.main-wrapper {
    width: 100%;
    max-width: 1000px;
    position: relative;
}

/* --- Loading State Styles --- */
#loading-indicator {
    display: none;
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    z-index: 100;
    animation: pulse 3.5s infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(0.9);
    }

    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.1);
    }

    100% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(0.9);
    }
}

.loading-state {
    opacity: 0.4;
    pointer-events: none;
    filter: grayscale(20%);
    transition: opacity 0.3s;
}

/* --- Layout Blocks --- */
.full-width-section {
    background: white;
    padding: 1.25rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
}

.description-text {
    margin-top: 0;
    margin-bottom: 1rem;
    color: #4b5563;
    line-height: 1.5;
}

.checkbox-group {
    display: flex;
    gap: 2rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

.checkbox-label {
    display: flex;
    align-items: center;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: help;
}

.checkbox-label input {
    margin-right: 0.4rem;
}

.container {
    display: flex;
    gap: 1rem;
    width: 100%;
    margin-bottom: 1rem;
}

.column {
    flex: 1;
    background: white;
    padding: 1.25rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

h2,
h3 {
    margin-top: 0;
    padding-bottom: 0.25rem;
    border-bottom: 2px solid #e5e7eb;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

h3 {
    font-size: 1.1rem;
}

.field {
    margin-bottom: 0.75rem;
}

.field-inline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.field-inline label {
    margin-bottom: 0;
    /* Overrides the block label margin */
    white-space: nowrap;
}

label {
    display: block;
    margin-bottom: 0.2rem;
    font-size: 0.8rem;
    color: #4b5563;
    font-weight: 600;
}

.flex-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.2rem;
}

.flex-header label {
    margin-bottom: 0;
}

.freetext-text {
    min-height: 90px;
}

.btn-small {
    background-color: #e5e7eb;
    color: #374151;
    border: 1px solid var(--border-color);
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-small:hover {
    background-color: #d1d5db;
}

input[type="text"],
textarea {
    width: 100%;
    padding: 0.4rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    font-family: inherit;
    font-size: 0.9rem;
}

textarea {
    resize: vertical;
    min-height: 60px;
}

.section-divider {
    margin: 1rem 0;
    border: 0;
    border-top: 1px solid #e5e7eb;
}

.clear-btn {
    position: absolute;
    right: 8px;
    top: 6px;
    background: none;
    border: none;
    color: #9ca3af;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    z-index: 2;
}

.clear-btn:hover {
    color: #dc2626;
}

.textarea-container {
    position: relative;
    width: 100%;
}

.textarea-container textarea {
    padding-right: 32px;
    padding-left: 0.4rem;
}

/* Shift textarea clear button to avoid overlapping the vertical scrollbar */
.textarea-container .clear-btn {
    top: 10px;
    right: 20px;
}

.action-area {
    text-align: center;
    margin-bottom: 1rem;
}

.btn-transform {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 2.5rem;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.3);
    transition: background-color 0.2s, transform 0.1s;
}

.btn-transform:hover:not(:disabled) {
    background-color: var(--primary-hover);
}

.btn-transform:active:not(:disabled) {
    transform: translateY(2px);
}



#output-text {
    white-space: pre-wrap;
    font-family: monospace;
    background-color: var(--readonly-bg);
    border: 1px solid #ccc;
    padding: 1em;
    border-radius: 5px;
    min-height: 10px;
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .field-inline {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
    }
}