@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    
    --diff-add-bg: #e6ffec;
    --diff-rem-bg: #ffebe9;
    --diff-emp-bg: #f6f8fa;
    --diff-hl-add-bg: #abf2bc;
    --diff-hl-add-text: #05501e;
    --diff-hl-rem-bg: #ffb8b8;
    --diff-hl-rem-text: #cb2431;
    --diff-ln-bg: #f6f8fa;
    --diff-ln-text: #6e7781;
}

html {
    overflow-y: scroll;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 2rem;
    line-height: 1.5;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

h2 {
    font-weight: 600;
    font-size: 1.75rem;
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.description {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
    background-color: var(--card-bg);
    padding: 1.25rem 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.description p {
    margin: 0 0 0.5rem 0;
}

.description p:last-child {
    margin-bottom: 0;
}

.description ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.description li {
    margin-bottom: 0.25rem;
}

.warning-text {
    color: #b91c1c;
    font-weight: 500;
    font-size: 0.875rem;
    margin-top: 0.75rem !important;
}

.drop-zone {
    background-color: var(--card-bg);
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    height: 160px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0 2rem;
    margin-bottom: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-muted);
    font-size: 1rem;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary);
    background-color: #eef2ff; /* primary tint */
    color: var(--primary);
}

.button-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

button {
    font-family: inherit;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s, color 0.2s;
    border: 1px solid transparent;
}

#compareBtn {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

#compareBtn:hover {
    background-color: var(--primary-hover);
}

.controls-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Segmented Toggle Styles */
.toggle-segmented {
    display: inline-flex;
    background-color: #f1f5f9;
    border-radius: 8px;
    padding: 4px;
}

.toggle-segmented input[type="radio"] {
    display: none;
}

.toggle-segmented label {
    padding: 6px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.toggle-segmented input[type="radio"]:checked + label {
    background-color: white;
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

#result {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

/* Diff Table Styles */
table.diff-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.875rem;
    text-align: left;
}

table.diff-table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

table.diff-table th {
    background: var(--card-bg);
    border-bottom: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--text-main);
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

table.diff-table th.diff-ln {
    width: 50px;
    border-right: 1px solid var(--border-color);
}

table.diff-table td {
    padding: 0.35rem 0.5rem;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: top;
    line-height: 1.4;
}

table.diff-table td:not(:last-child) {
    border-right: 1px solid var(--border-color);
}

.diff-ln {
    width: 50px;
    text-align: right;
    background-color: var(--diff-ln-bg) !important;
    color: var(--diff-ln-text);
    user-select: none;
    padding-right: 0.75rem !important;
}

.diff-content {
    width: calc(50% - 25px);
    overflow-wrap: anywhere;
    white-space: pre-wrap !important;
}

/* Added/Removed backgrounds */
.diff-added { background-color: var(--diff-add-bg); }
.diff-removed { background-color: var(--diff-rem-bg); }
.diff-empty { background-color: var(--diff-emp-bg); }

/* Highlights */
.highlight-added {
    font-weight: 600;
    background-color: var(--diff-hl-add-bg);
    color: var(--diff-hl-add-text);
    border-radius: 3px;
    padding: 0 0.125rem;
}

.highlight-removed {
    font-weight: 600;
    background-color: var(--diff-hl-rem-bg);
    color: var(--diff-hl-rem-text);
    border-radius: 3px;
    padding: 0 0.125rem;
}

.diff-comment {
    color: var(--text-muted);
    font-style: italic;
}

/* Hide Unchanged toggle */
table.diff-table.hide-unchanged tr.diff-unchanged {
    display: none;
}