.latex-editor-tool {
    --latex-ink: #172033;
    --latex-muted: #637083;
    --latex-line: #d9e2ef;
    --latex-soft: #f5f8fb;
    --latex-card: #ffffff;
    --latex-primary: #0f6fb5;
    --latex-primary-dark: #0a4f82;
    --latex-accent: #0d9488;
    --latex-gold: #b7791f;
    --latex-red: #c24136;
    --latex-green: #16835b;
    --latex-shadow: 0 16px 34px rgba(22, 36, 58, .08);
    width: 100%;
    color: var(--latex-ink);
}

.latex-editor-tool * {
    box-sizing: border-box;
    letter-spacing: 0;
}

.latex-editor-tool button,
.latex-editor-tool input,
.latex-editor-tool select,
.latex-editor-tool textarea {
    font: inherit;
}

.latex-shell {
    display: grid;
    gap: 16px;
}

.latex-guide {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
    gap: 14px;
}

.latex-note,
.latex-statbar,
.latex-panel,
.latex-preview-panel,
.latex-section {
    background: var(--latex-card);
    border: 1px solid var(--latex-line);
    border-radius: 8px;
    box-shadow: var(--latex-shadow);
}

.latex-note {
    padding: 18px;
    background:
        linear-gradient(135deg, rgba(15, 111, 181, .08), rgba(13, 148, 136, .09)),
        #fff;
}

.latex-note strong {
    display: block;
    margin-bottom: 7px;
    color: #12213a;
    font-size: 18px;
    line-height: 1.38;
}

.latex-note span {
    display: block;
    color: var(--latex-muted);
    font-size: 13px;
    line-height: 1.7;
}

.latex-statbar {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1px;
    overflow: hidden;
    background: #e3ebf5;
}

.latex-stat {
    min-height: 74px;
    padding: 14px 12px;
    background: #fbfcff;
}

.latex-stat span {
    display: block;
    margin-bottom: 5px;
    color: var(--latex-muted);
    font-size: 12px;
}

.latex-stat b {
    display: block;
    color: #14233a;
    font-size: 18px;
    line-height: 1.25;
    word-break: break-word;
}

.latex-stat b.is-good { color: var(--latex-green); }
.latex-stat b.is-bad { color: var(--latex-red); }
.latex-stat b.is-warn { color: var(--latex-gold); }

.latex-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.latex-tab {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 10px;
    min-height: 66px;
    border: 1px solid var(--latex-line);
    border-radius: 8px;
    background: #fff;
    color: #12395f;
    padding: 12px;
    text-align: left;
    cursor: pointer;
    transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease;
}

.latex-tab:hover {
    border-color: rgba(15, 111, 181, .45);
    transform: translateY(-1px);
}

.latex-tab.is-active {
    border-color: var(--latex-primary);
    background: linear-gradient(180deg, #fff, #eef7fc);
    box-shadow: 0 10px 24px rgba(15, 111, 181, .14);
}

.latex-tab-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #e8f2fb;
    color: var(--latex-primary-dark);
    font-size: 14px;
    font-weight: 900;
}

.latex-tab.is-active .latex-tab-index {
    background: var(--latex-primary);
    color: #fff;
}

.latex-tab-text {
    display: grid;
    gap: 3px;
}

.latex-tab-text b {
    color: #102a43;
    font-size: 15px;
}

.latex-tab-text small {
    color: var(--latex-muted);
    font-size: 12px;
}

.latex-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, .82fr);
    gap: 16px;
    align-items: start;
}

.latex-panel,
.latex-preview-panel {
    overflow: hidden;
}

.latex-panel {
    padding: 18px;
}

.latex-step {
    display: none;
}

.latex-step.is-active {
    display: grid;
    gap: 16px;
}

.latex-step-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #edf2f7;
}

.latex-step-head h3 {
    margin: 0 0 6px;
    color: #13243a;
    font-size: 18px;
    line-height: 1.32;
}

.latex-step-head p {
    margin: 0;
    color: var(--latex-muted);
    font-size: 13px;
    line-height: 1.62;
}

.latex-section {
    padding: 16px;
    box-shadow: none;
}

.latex-section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.latex-section-title b {
    color: #172033;
    font-size: 15px;
}

.latex-section-title span {
    color: var(--latex-muted);
    font-size: 12px;
    line-height: 1.5;
    text-align: right;
}

#latex-input {
    width: 100%;
    min-height: 230px;
    border: 1px solid #cfd9e6;
    border-radius: 8px;
    background: #fbfdff;
    color: #102033;
    padding: 14px;
    resize: vertical;
    outline: none;
    font-family: Consolas, Monaco, "Microsoft YaHei", monospace;
    font-size: 14px;
    line-height: 1.62;
}

#latex-input:focus {
    border-color: var(--latex-primary);
    box-shadow: 0 0 0 3px rgba(15, 111, 181, .12);
    background: #fff;
}

.latex-editor-actions,
.latex-nav-actions,
.latex-preview-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.latex-editor-actions {
    margin-top: 10px;
}

.latex-nav-actions {
    justify-content: flex-end;
}

.latex-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 38px;
    border: 1px solid #cfd8e6;
    border-radius: 7px;
    background: #fff;
    color: #24364b;
    padding: 9px 13px;
    cursor: pointer;
    font-weight: 800;
    transition: border-color .18s ease, background .18s ease, color .18s ease, transform .18s ease;
}

.latex-btn:hover {
    border-color: var(--latex-primary);
    color: var(--latex-primary-dark);
}

.latex-btn.primary {
    border-color: var(--latex-primary);
    background: var(--latex-primary);
    color: #fff;
}

.latex-btn.primary:hover {
    background: var(--latex-primary-dark);
    color: #fff;
    transform: translateY(-1px);
}

.latex-btn.small {
    min-height: 32px;
    padding: 6px 10px;
    font-size: 12px;
}

.latex-btn:disabled,
.latex-action:disabled {
    cursor: not-allowed;
    opacity: .58;
}

.latex-symbol-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 8px;
}

.latex-symbol-grid button,
.latex-template-grid button,
.latex-example-list button {
    min-width: 0;
    border: 1px solid #dbe5ef;
    border-radius: 8px;
    background: #fff;
    color: #26364d;
    cursor: pointer;
    text-align: left;
    transition: border-color .18s ease, background .18s ease, box-shadow .18s ease, transform .18s ease;
}

.latex-symbol-grid button {
    min-height: 58px;
    padding: 9px 10px;
}

.latex-symbol-grid button:hover,
.latex-template-grid button:hover,
.latex-example-list button:hover {
    border-color: rgba(15, 111, 181, .58);
    background: #f5fafc;
    box-shadow: 0 8px 18px rgba(29, 91, 148, .08);
    transform: translateY(-1px);
}

.latex-symbol-grid strong,
.latex-template-grid b,
.latex-example-list b {
    display: block;
    color: #173d63;
    font-size: 13px;
    line-height: 1.25;
}

.latex-symbol-grid span,
.latex-template-grid span,
.latex-example-list span {
    display: block;
    margin-top: 4px;
    color: var(--latex-muted);
    font-size: 12px;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.latex-template-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.latex-template-grid button {
    min-height: 72px;
    padding: 13px;
}

.latex-settings-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.latex-field {
    display: grid;
    gap: 7px;
    min-width: 0;
    position: relative;
}

.latex-field label {
    color: #344054;
    font-size: 13px;
    font-weight: 800;
}

.latex-field input[type="text"],
.latex-field input[type="number"],
.latex-field select {
    width: 100%;
    min-height: 40px;
    border: 1px solid #cfd9e6;
    border-radius: 7px;
    background: #fff;
    color: var(--latex-ink);
    padding: 8px 10px;
    outline: none;
}

.latex-field input[type="text"]:focus,
.latex-field input[type="number"]:focus,
.latex-field select:focus {
    border-color: var(--latex-primary);
    box-shadow: 0 0 0 3px rgba(15, 111, 181, .12);
}

.latex-field input[type="color"] {
    width: 100%;
    height: 40px;
    border: 1px solid #cfd9e6;
    border-radius: 7px;
    background: #fff;
    padding: 4px;
}

.latex-field input[type="range"] {
    width: 100%;
    accent-color: var(--latex-primary);
}

.latex-range-value {
    color: var(--latex-muted);
    font-size: 12px;
    font-weight: 800;
}

.latex-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.latex-swatches button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    border: 1px solid #dbe5ef;
    border-radius: 999px;
    background: #fff;
    color: #31445f;
    padding: 8px 11px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 800;
}

.latex-swatches button:hover {
    border-color: var(--latex-primary);
    color: var(--latex-primary-dark);
}

.latex-swatches i {
    width: 20px;
    height: 20px;
    border: 1px solid #c7d2df;
    border-radius: 50%;
    background-size: 12px 12px !important;
}

.latex-action-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.latex-action {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 8px 10px;
    min-height: 86px;
    border: 1px solid #dbe5ef;
    border-radius: 8px;
    background: #fff;
    color: #24364b;
    padding: 14px;
    text-align: left;
    cursor: pointer;
    transition: border-color .18s ease, background .18s ease, box-shadow .18s ease, transform .18s ease;
}

.latex-action:hover {
    border-color: var(--latex-primary);
    background: #f6fbff;
    box-shadow: 0 10px 20px rgba(29, 91, 148, .1);
    transform: translateY(-1px);
}

.latex-action i {
    grid-row: 1 / span 2;
    color: var(--latex-accent);
    font-size: 24px;
}

.latex-action b {
    align-self: end;
    color: #143553;
    font-size: 14px;
}

.latex-action span {
    color: var(--latex-muted);
    font-size: 12px;
    line-height: 1.4;
}

.latex-example-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.latex-example-list button {
    min-height: 78px;
    padding: 13px;
}

.latex-preview-panel {
    position: sticky;
    top: 82px;
}

.latex-preview-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border-bottom: 1px solid #edf2f7;
    background: #f7f9fc;
}

.latex-preview-head b {
    color: #172033;
    font-size: 15px;
}

.latex-preview-wrap {
    display: grid;
    place-items: center;
    min-height: 280px;
    padding: 18px;
    overflow: auto;
    background-color: #f8fafc;
    background-image:
        linear-gradient(45deg, rgba(207, 216, 230, .45) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(207, 216, 230, .45) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(207, 216, 230, .45) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(207, 216, 230, .45) 75%);
    background-size: 18px 18px;
    background-position: 0 0, 0 9px, 9px -9px, -9px 0;
}

.latex-preview-surface {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 180px;
    min-height: 96px;
    max-width: 100%;
    border: 1px solid rgba(203, 213, 225, .82);
    border-radius: 8px;
    background: #fff;
    color: #111827;
    padding: 28px;
    box-shadow: 0 12px 28px rgba(22, 36, 58, .1);
    overflow: auto;
}

#latex-output {
    max-width: 100%;
    color: inherit;
    font-size: 120%;
}

#latex-output mjx-container {
    margin: 0 !important;
    outline: 0;
}

.latex-preview-surface.is-inline #latex-output mjx-container {
    display: inline-block !important;
}

.latex-diagnostics {
    display: grid;
    gap: 5px;
    padding: 13px 16px;
    border-top: 1px solid #edf2f7;
    background: #fbfdff;
}

.latex-diagnostics b {
    color: #26364d;
    font-size: 13px;
}

.latex-diagnostics span {
    color: var(--latex-muted);
    font-size: 12px;
    line-height: 1.55;
    word-break: break-word;
}

.latex-diagnostics.is-error span {
    color: var(--latex-red);
}

.latex-status {
    min-height: 20px;
    color: var(--latex-muted);
    font-size: 13px;
    line-height: 1.55;
}

.latex-status.is-good { color: var(--latex-green); }
.latex-status.is-error { color: var(--latex-red); }
.latex-status.is-warn { color: var(--latex-gold); }

@media (max-width: 1180px) {
    .latex-guide,
    .latex-workspace {
        grid-template-columns: 1fr;
    }

    .latex-preview-panel {
        position: static;
    }

    .latex-symbol-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .latex-settings-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .latex-tabs,
    .latex-statbar,
    .latex-template-grid,
    .latex-action-grid,
    .latex-example-list {
        grid-template-columns: 1fr;
    }

    .latex-tab {
        min-height: 58px;
    }

    .latex-step-head,
    .latex-section-title,
    .latex-preview-head {
        align-items: stretch;
        flex-direction: column;
    }

    .latex-section-title span {
        text-align: left;
    }

    .latex-symbol-grid,
    .latex-settings-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .latex-panel {
        padding: 14px;
    }

    .latex-preview-wrap {
        min-height: 220px;
        padding: 12px;
    }

    .latex-preview-surface {
        padding: 20px;
    }
}

@media (max-width: 420px) {
    .latex-symbol-grid,
    .latex-settings-grid {
        grid-template-columns: 1fr;
    }

    #latex-input {
        min-height: 190px;
    }
}