body { font-family: 'Pretendard', sans-serif; }
.katex-display { text-align: left !important; }

/* --- LaTeX Toolbar styles (ported) --- */
.toolbar-btn {
    font-family: 'Times New Roman', serif;
    min-width: 2.2rem;
    height: 2.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.1s;
    font-size: 0.9rem;
    line-height: 1.2;
    padding: 0 0.4rem;
}
.toolbar-btn .katex { font-size: 1em; }
.toolbar-btn.text-xs {
    font-size: 0.9rem;
    line-height: 1.2;
}
.toolbar-btn:active { transform: translateY(1px); background-color: #e5e7eb; }
.toolbar-btn:hover { background-color: #f3f4f6; border-color: #9ca3af; }
.focus-indicator {
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.focus-indicator.mode-text {
    color: #2563eb;
    background-color: #eff6ff;
    border-color: #bfdbfe;
}
.focus-indicator.mode-answer {
    color: #b45309;
    background-color: #fffbeb;
    border-color: #fde68a;
}
.tab-btn { transition: all 0.2s; white-space: nowrap; }
.tab-btn.active {
    color: #2563EB;
    border-bottom-color: #2563EB;
    background-color: #EFF6FF;
    font-weight: 600;
}

.toolbar-scroll { max-height: 12.5rem; }
.toolbar-scroll::-webkit-scrollbar { height: 6px; }
.toolbar-scroll::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }

/* --- Toolbar layout tokens (consistent spacing across ALL tabs) --- */
:root {
    --tb-gap: 0.25rem;                     /* gap between buttons */
    --tb-label-mb: calc(var(--tb-gap) + 0.125rem); /* label -> buttons */
    --tb-divider-my: 0.25rem;              /* space around divider line */
    --tb-block-gap: 0.5rem;                /* gap between subsection blocks (grid) */
}

/* Make every toolbar tab render with the same vertical rhythm */
.toolbar-content {
    display: block;
}

/* 2-column layout for subsection blocks (groups) */
.tb-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--tb-block-gap);
}

.tb-section {
    width: 100%;
    min-width: 0;
}

.tb-label {
    width: 100%;
    font-size: 10px;
    color: #9ca3af; /* gray-400 */
    margin: 0 0 var(--tb-label-mb) 0;
    padding: 0;
    line-height: 1.2;
}

.tb-buttons {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: var(--tb-gap);
}

.tb-divider {
    width: 100%;
    height: 1px;
    background: #e5e7eb; /* gray-200 */
    margin: var(--tb-divider-my) 0;
}
input, textarea {
            transition: all 0.2s ease-in-out;
        }
#variables-container table {
    table-layout: fixed;
    width: 100%;
}
#variables-container td input {
    min-width: 0;
}
input:focus, textarea:focus {
            box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.5);
            border-color: #3B82F6;
        }
.preview-container h3 {
            font-weight: 600;
        }
/* --- Layout hardening for 2-column grid --- */
.preview-container { min-width: 0; overflow: hidden; }
.preview-container .prose { min-width: 0; overflow-x: auto; }
.katex-display { overflow-x: auto; overflow-y: hidden; }
#text-preview, #answer-preview {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.katex {
    overflow-wrap: break-word;
}

/* --- Full Preview Modal --- */
.preview-question { page-break-inside: avoid; break-inside: avoid; }
.preview-question + .preview-question { border-top: 1px solid #e5e7eb; padding-top: 1.5rem; margin-top: 1.5rem; }
.preview-question .pq-header { display: flex; align-items: baseline; gap: 0.5rem; margin-bottom: 0.75rem; }
.preview-question .pq-number { font-size: 1.1rem; font-weight: 700; color: #1f2937; white-space: nowrap; }
.preview-question .pq-id { font-size: 0.75rem; color: #6b7280; font-family: monospace; }
.preview-question .pq-points { font-size: 0.75rem; color: #6b7280; margin-left: auto; white-space: nowrap; }
.preview-question .pq-title { font-size: 0.95rem; font-weight: 600; color: #374151; margin-bottom: 0.5rem; }
.preview-question .pq-body { font-size: 0.9rem; line-height: 1.7; color: #1f2937; }
.preview-question .pq-image { max-width: 60%; max-height: 20rem; object-fit: contain; margin: 0.75rem auto; display: block; border: 1px solid #e5e7eb; border-radius: 0.375rem; }

/* --- Confirm dialog message --- */
#confirm-message {
    white-space: pre-line;
    overflow-wrap: anywhere;
    word-break: break-word;
    max-height: min(40vh, 16rem);
    overflow-y: auto;
}
.confirm-dialog {
    max-width: 24rem;
    width: 100%;
}

/* Shared answer/variable styles (used in full preview + import detail) */
.pq-answer-section { margin-top: 0.75rem; padding: 0.5rem 0.75rem; background: #f9fafb; border: 1px solid #e5e7eb; border-radius: 0.375rem; }
.pq-answer-label { font-size: 0.75rem; font-weight: 600; color: #6b7280; margin-bottom: 0.25rem; }
.pq-vars-inline { margin-top: 0.5rem; margin-bottom: 0.5rem; font-size: 0.75rem; color: #6b7280; display: flex; flex-wrap: wrap; gap: 0.25rem 0.75rem; }
.pq-vars-inline .pq-var-item { font-family: monospace; white-space: nowrap; }
.pq-vars-inline .pq-var-name { color: #2563eb; font-weight: 600; }

/* --- Import modal: tree structure --- */
.import-folder {
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    overflow: hidden;
    margin-top: 0.5rem;
}
.import-folder-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: #f3f4f6;
    cursor: pointer;
    user-select: none;
    transition: background 0.15s;
}
.import-folder-header:hover { background: #e5e7eb; }
.import-folder-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.75rem;
    color: #6b7280;
    transition: transform 0.2s;
    flex-shrink: 0;
}
.import-folder-toggle.collapsed { transform: rotate(-90deg); }
.import-folder-icon { font-size: 1rem; flex-shrink: 0; }
.import-folder-label { font-size: 0.8rem; font-weight: 600; color: #374151; flex: 1; min-width: 0; }
.import-folder-count { font-size: 0.7rem; color: #9ca3af; flex-shrink: 0; }
.import-folder-body { border-top: 1px solid #e5e7eb; }
.import-folder-body.collapsed { display: none; }

.import-file-section {
    margin: 0;
    border-radius: 0;
    border: none;
    border-bottom: 1px solid #e5e7eb;
}
.import-file-header {
    background: #f9fafb;
}
.import-file-header-root {
    padding-left: 0.75rem;
}
.import-file-header-nested {
    padding-left: 1.5rem;
}
.import-file-toggle {
    width: 1.25rem;
    height: 1.25rem;
    font-size: 0.65rem;
}
.import-file-icon {
    font-size: 0.85rem;
}
.import-file-label {
    font-size: 0.75rem;
}

/* Bigger expand buttons for import items */
.import-expand-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: 2rem !important;
    height: 2rem !important;
    font-size: 0.85rem !important;
    border-radius: 0.375rem;
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
}
.import-expand-btn:hover { background: #dbeafe; border-color: #93c5fd; color: #2563eb; }

/* --- Variable pill chips (preview & import) --- */
.pq-var-chip {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    background: #eef2ff;
    color: #3730a3;
    font-size: 12px;
    margin: 2px 4px 2px 0;
    border: 1px solid #c7d2fe;
    font-family: monospace;
    white-space: nowrap;
}
.pq-var-chip .pq-var-name { color: #2563eb; font-weight: 600; }

/* --- Preview answer toggle (details/summary) --- */
.pq-answer-toggle { margin-top: 0.75rem; }
.pq-answer-toggle summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #6b7280;
    transition: background 0.15s;
}
.pq-answer-toggle summary:hover { background: #f3f4f6; }
.pq-answer-toggle summary::-webkit-details-marker { display: none; }
.pq-answer-toggle summary::marker { content: ""; }
.pq-answer-toggle .pq-chev {
    display: inline-block;
    transition: transform 0.2s;
    font-size: 0.65rem;
    color: #9ca3af;
}
.pq-answer-toggle[open] .pq-chev { transform: rotate(90deg); }
.pq-answer-toggle[open] summary { border-radius: 0.375rem 0.375rem 0 0; border-bottom-color: transparent; }
.pq-answer-toggle .pq-answer-body {
    padding: 0.5rem 0.75rem;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-top: none;
    border-radius: 0 0 0.375rem 0.375rem;
}

/* --- Tree dropdown (question navigator) --- */
.tree-dropdown { position: relative; }
.tree-dropdown-btn {
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    padding: 0.35rem 0.5rem;
    background: white;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    min-width: 5rem;
    max-width: 14rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.15s;
    line-height: 1.3;
}
.tree-dropdown-btn:hover { border-color: #93c5fd; background: #f0f9ff; }

/* Header top controls: match question dropdown height to action buttons */
#question-tree-btn.tree-dropdown-btn {
    min-height: 2.375rem;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    width: 7rem;
    max-width: 7rem;
}

#preview-tree-btn.tree-dropdown-btn {
    min-height: 2.375rem;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    width: 7rem;
    max-width: 7rem;
}

.preview-modal-action-btn {
    min-height: 2.375rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

#import-search {
    min-height: 2.125rem;
    line-height: 1.25rem;
}

#import-file-nav-btn.tree-dropdown-btn {
    min-height: 2.125rem;
    min-width: 8rem;
    font-size: 0.8rem;
    line-height: 1.25rem;
    padding: 0.375rem 0.5rem;
}

#import-file-nav-btn .import-folder-icon {
    font-size: 0.85rem;
}

#import-file-nav-popup.tree-dropdown-popup {
    width: 18rem;
}
.import-file-nav-list {
    max-height: 16rem;
}

.import-status {
    min-height: 1rem;
    font-size: 0.75rem;
    color: #6b7280;
}

.import-status.import-status-busy {
    color: #1d4ed8;
    font-weight: 600;
}

.import-deferred-image-note {
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px dashed #bfdbfe;
    border-radius: 0.375rem;
    background: #eff6ff;
    color: #1d4ed8;
    font-size: 0.75rem;
}

#import-file-nav-btn:disabled {
    color: #9ca3af;
    background: #f9fafb;
    border-color: #e5e7eb;
    cursor: not-allowed;
}

#import-search:disabled {
    background: #f9fafb;
    color: #9ca3af;
    cursor: not-allowed;
}

.tree-dropdown-popup {
    position: absolute;
    right: 0;
    left: auto;
    top: 100%;
    margin-top: 4px;
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.12);
    z-index: 50;
    width: 20rem;
    max-width: calc(100vw - 2rem);
    max-height: 22rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.tree-search-box {
    padding: 0.5rem;
    border-bottom: 1px solid #f3f4f6;
    flex-shrink: 0;
}
.tree-search-input {
    width: 100%;
    font-size: 0.8rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.375rem;
    padding: 0.35rem 0.5rem;
    outline: none;
    transition: border-color 0.15s;
}
.tree-search-input:focus { border-color: #93c5fd; }
.tree-list {
    overflow-y: auto;
    padding: 0.25rem;
    flex: 1 1 auto;
    min-height: 0;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
}
/* Tree group headers (used in import file nav) */
.tree-group-hdr {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #374151;
    cursor: pointer;
    border-radius: 0.25rem;
    user-select: none;
    margin-top: 0.125rem;
}
.tree-group-hdr:hover { background: #f3f4f6; }
.tree-group-count { font-size: 0.65rem; color: #9ca3af; margin-left: auto; }
.tree-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.35rem 0.5rem;
    font-size: 0.8rem;
    color: #4b5563;
    cursor: pointer;
    border-radius: 0.25rem;
    transition: background 0.1s;
}
.tree-item:hover { background: #eff6ff; }
.tree-item.active { background: #dbeafe; color: #1d4ed8; font-weight: 600; }
.tree-item-num { color: #9ca3af; font-size: 0.7rem; min-width: 1.75rem; flex-shrink: 0; }
.tree-item-num-icon { min-width: auto; }
.tree-item-id { font-family: monospace; font-size: 0.7rem; color: #6b7280; }
.tree-item-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-item-indent-root { padding-left: 0.5rem; }
.tree-item-indent-nested { padding-left: 1.5rem; }

/* --- Print styles --- */
@media print {
    body { background: white !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; padding: 0 !important; margin: 0 !important; }
    body > .max-w-screen-2xl > header,
    body > .max-w-screen-2xl > main,
    body > .max-w-screen-2xl > input,
    #third-party-notices-link { display: none !important; }
    body > .max-w-screen-2xl { max-width: 100% !important; padding: 0 !important; margin: 0 !important; }
    #preview-modal { position: static !important; background: none !important; display: block !important; overflow: visible !important; }
    #preview-modal > div { background: white !important; box-shadow: none !important; margin: 0 !important; max-width: 100% !important; min-height: auto !important; border-radius: 0 !important; }
    .print\:hidden { display: none !important; }
    .preview-question { page-break-inside: avoid; break-inside: avoid; }
    .preview-question .pq-answer-section { background: white !important; }
    .pq-answer-toggle { display: block !important; }
    .pq-answer-toggle summary { display: none !important; }
    .pq-answer-toggle .pq-answer-body { display: block !important; border: none !important; background: white !important; padding: 0 !important; }
    .pq-var-chip { background: white !important; border-color: #d1d5db !important; }
    .pq-image { max-width: 60% !important; max-height: 7cm !important; object-fit: contain !important; }
    .min-width-banner { display: none !important; }
    #import-modal { display: none !important; }
    @page { margin: 1.5cm; }
}

/* --- Button hierarchy --- */
.btn-primary {
    background-color: #2563eb;
    color: white;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: background-color 0.15s, transform 0.08s;
}
.btn-primary:hover { background-color: #1d4ed8; }
.btn-primary:active { transform: translateY(1px); }

.btn-secondary {
    background-color: white;
    color: #374151;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    border: 1px solid #d1d5db;
    transition: background-color 0.15s, border-color 0.15s, transform 0.08s;
}
.btn-secondary:hover { background-color: #f9fafb; border-color: #9ca3af; }
.btn-secondary:active { transform: translateY(1px); }

.btn-guide {
    background-color: #eff6ff;
    color: #1d4ed8;
    border-color: #bfdbfe;
}
.btn-guide:hover {
    background-color: #dbeafe;
    border-color: #93c5fd;
}

.btn-danger {
    background-color: white;
    color: #dc2626;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    border: 1px solid #fca5a5;
    transition: background-color 0.15s, transform 0.08s;
}
.btn-danger:hover { background-color: #fef2f2; border-color: #f87171; }
.btn-danger:active { transform: translateY(1px); }

.btn-danger-fill {
    background-color: #dc2626;
    color: white;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    transition: background-color 0.15s, transform 0.08s;
}
.btn-danger-fill:hover { background-color: #b91c1c; }
.btn-danger-fill:active { transform: translateY(1px); }
.btn-danger-fill:disabled { background-color: #9ca3af; cursor: not-allowed; }

/* --- Header metadata line --- */
.header-meta-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    font-size: 12px;
    color: #6b7280;
}
.header-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 9999px;
    background: #ffffff;
    line-height: 1.25;
}
.header-pill-with-info {
    display: inline-flex;
    align-items: center;
    gap: 0.22rem;
}
.header-sep {
    color: #cbd5e1;
    line-height: 1;
}
.header-notice {
    position: relative;
    display: inline-flex;
    align-items: center;
    outline: none;
}
.header-notice-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.1rem;
    height: 1.1rem;
    border: 1px solid #cbd5e1;
    border-radius: 9999px;
    color: #64748b;
    background: #ffffff;
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
}
.header-notice:hover .header-notice-trigger,
.header-notice:focus-within .header-notice-trigger {
    border-color: #93c5fd;
    color: #2563eb;
    background: #eff6ff;
}
.header-notice-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 0.35rem);
    min-width: 20rem;
    max-width: min(32rem, calc(100vw - 2rem));
    padding: 0.55rem 0.7rem;
    background: #ffffff;
    border: 1px solid #dbeafe;
    border-radius: 0.5rem;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.12);
    line-height: 1.45;
    color: #475569;
    z-index: 60;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(2px);
    transition: opacity 0.12s ease, transform 0.12s ease, visibility 0.12s ease;
}
.header-notice:hover .header-notice-panel,
.header-notice:focus-within .header-notice-panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}
.header-notice-local .header-notice-panel {
    right: 0;
    left: auto;
}
.header-notice-responsibility .header-notice-panel {
    right: 0;
    left: auto;
}