:root {
    --latex-pdf-bg: var(--bg-normal, #f5f6f8);
    --latex-pdf-surface: var(--bg-primary, #ffffff);
    --latex-pdf-border: var(--border-color, rgba(0, 0, 0, 0.1));
    --latex-pdf-text: var(--text-color, #1f2937);
    --latex-pdf-muted: var(--text-color-secondary, #6b7280);
    --latex-pdf-accent: var(--accent-color, #2563eb);
    --latex-pdf-success: #16a34a;
    --latex-pdf-danger: #dc2626;
}

:root[data-mode="dark"] {
    --latex-pdf-bg: #1c1c20;
    --latex-pdf-surface: #18181b;
    --latex-pdf-border: rgba(255, 255, 255, 0.1);
    --latex-pdf-text: #f4f4f5;
    --latex-pdf-muted: #a1a1aa;
    --latex-pdf-success: #4ade80;
    --latex-pdf-danger: #f87171;
}

.latex-pdf-preview-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 48%;
    max-width: 820px;
    min-width: 420px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--latex-pdf-bg);
    border-left: 1px solid var(--latex-pdf-border);
    z-index: 42;
    overflow: hidden;
    transform: translateX(100%);
    opacity: 0;
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
}

.latex-pdf-preview-panel.visible {
    transform: translateX(0);
    opacity: 1;
}

body.latex-pdf-preview-open .main-container {
    margin-right: 48%;
    transition: margin-right 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 1400px) {
    body.latex-pdf-preview-open .main-container {
        margin-right: min(48%, 820px);
    }
}

.latex-pdf-preview-header {
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 0 14px;
    background: var(--latex-pdf-surface);
    border-bottom: 1px solid var(--latex-pdf-border);
    flex-shrink: 0;
}

.latex-pdf-preview-left,
.latex-pdf-preview-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.latex-pdf-preview-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.latex-pdf-preview-title {
    color: var(--latex-pdf-text);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 260px;
}

.latex-pdf-preview-status {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--latex-pdf-muted);
    font-size: 11px;
    line-height: 1.2;
}

.latex-pdf-preview-status::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: var(--latex-pdf-muted);
}

.latex-pdf-preview-status.compiling::before {
    background: var(--latex-pdf-accent);
    animation: latexPdfPulse 1.2s ease-in-out infinite;
}

.latex-pdf-preview-status.ready::before {
    background: var(--latex-pdf-success);
}

.latex-pdf-preview-status.error::before {
    background: var(--latex-pdf-danger);
}

.latex-pdf-preview-icon-btn,
.latex-pdf-preview-action-btn {
    height: 34px;
    border: 1px solid var(--latex-pdf-border);
    border-radius: 8px;
    background: var(--latex-pdf-surface);
    color: var(--latex-pdf-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    cursor: pointer;
    font: inherit;
    font-size: 13px;
    white-space: nowrap;
}

.latex-pdf-preview-icon-btn {
    width: 34px;
    padding: 0;
}

.latex-pdf-preview-action-btn {
    padding: 0 12px;
}

.latex-pdf-preview-action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (hover: hover) and (pointer: fine) {
    .latex-pdf-preview-icon-btn:not(:disabled):hover,
    .latex-pdf-preview-action-btn:not(:disabled):hover {
        opacity: 0.86;
    }
}

.latex-pdf-preview-body {
    position: relative;
    flex: 1;
    min-height: 0;
    background: #70737a;
}

.latex-pdf-preview-frame {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    background: #ffffff;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.12s ease;
}

.latex-pdf-preview-frame.visible {
    opacity: 1;
    pointer-events: auto;
}

.latex-pdf-preview-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: #ffffff;
    background: linear-gradient(180deg, #5c616b 0%, #41464f 100%);
    font-size: 13px;
}

.latex-pdf-preview-loading.hidden {
    display: none;
}

.latex-pdf-preview-spinner {
    width: 28px;
    height: 28px;
    border: 3px solid rgba(255, 255, 255, 0.32);
    border-top-color: #ffffff;
    border-radius: 999px;
    animation: latexPdfSpin 0.9s linear infinite;
}

.latex-pdf-preview-log {
    max-height: 150px;
    overflow: auto;
    background: var(--latex-pdf-surface);
    border-top: 1px solid var(--latex-pdf-border);
    color: var(--latex-pdf-muted);
    font-size: 12px;
}

.latex-pdf-preview-log summary {
    cursor: pointer;
    padding: 8px 12px;
    color: var(--latex-pdf-text);
    font-weight: 600;
}

.latex-pdf-preview-log pre {
    margin: 0;
    padding: 0 12px 12px;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 11px;
}

.latex-pdf-result-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 16px;
    margin-bottom: 12px;
    border: 1px solid var(--latex-pdf-border);
    border-radius: 8px;
    background: var(--latex-pdf-surface);
    color: var(--latex-pdf-text);
}

.latex-pdf-result-icon {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(37, 99, 235, 0.1);
    color: var(--latex-pdf-accent);
}

.latex-pdf-result-card.ready .latex-pdf-result-icon {
    background: rgba(22, 163, 74, 0.12);
    color: var(--latex-pdf-success);
}

.latex-pdf-result-card.error .latex-pdf-result-icon {
    background: rgba(220, 38, 38, 0.12);
    color: var(--latex-pdf-danger);
}

.latex-pdf-result-info {
    flex: 1;
    min-width: 0;
}

.latex-pdf-result-title {
    font-size: 14px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.latex-pdf-result-sub {
    color: var(--latex-pdf-muted);
    font-size: 12px;
    margin-top: 2px;
}

.latex-pdf-result-btn {
    border: none;
    border-radius: 8px;
    background: var(--latex-pdf-accent);
    color: #ffffff;
    min-height: 34px;
    padding: 0 12px;
    font: inherit;
    font-size: 13px;
    cursor: pointer;
    flex-shrink: 0;
}

@media (max-width: 900px) {
    .latex-pdf-preview-panel {
        width: 100%;
        min-width: 0;
        z-index: 202;
    }

    body.latex-pdf-preview-open .main-container {
        margin-right: 0;
    }

    .latex-pdf-preview-action-btn span {
        display: none;
    }

    .latex-pdf-preview-title {
        max-width: 180px;
    }
}

@keyframes latexPdfSpin {
    to { transform: rotate(360deg); }
}

@keyframes latexPdfPulse {
    0%, 100% { opacity: 0.55; transform: scale(0.9); }
    50% { opacity: 1; transform: scale(1.08); }
}