.tm-imported-lesson.tm-chapter-07-lesson,
.tm-imported-lesson.tm-chapter-07-lesson * {
    box-sizing: border-box;
}

.tm-imported-lesson.tm-chapter-07-lesson {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: #000000;
    line-height: 1.8;
    width: 100%;
}

.tm-ch7-lesson-banner {
    border: 1px solid #e6eef5;
    border-radius: 16px;
    padding: 22px 24px;
    margin: 0 auto 26px;
    max-width: 950px;
    background: #fbfdff;
    box-shadow: 0 8px 22px rgba(31,55,77,.06);
}
.tm-ch7-lesson-banner span {
    display: inline-block;
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: #5d6f82;
    font-weight: 700;
    margin-bottom: 8px;
}
.tm-ch7-lesson-banner h2 {
    margin: 0 0 8px;
    font-size: clamp(1.35rem,3vw,2rem);
    line-height: 1.2;
    color: #0f2d69;
}
.tm-ch7-lesson-banner p { margin: 0; color: #5c6b78; }

.tm-chapter-07-lesson .tm-ch7-container,
.tm-chapter-07-lesson .container {
    max-width: 950px;
    width: 100%;
    margin: 0 auto;
    padding: 40px 20px;
}

.tm-chapter-07-lesson h1 {
    color: #0f2d69;
    font-size: 28px;
    border-bottom: 2px solid #c49a45;
    padding-bottom: 10px;
    margin-bottom: 40px;
    text-align: center;
}

.tm-chapter-07-lesson .question-block {
    display: flex !important;
    flex-direction: row !important;
    margin-bottom: 35px;
    align-items: flex-start;
    gap: 0;
}
.tm-chapter-07-lesson .q-number {
    font-weight: bold;
    color: #0f2d69;
    font-size: 20px;
    width: 45px;
    min-width: 45px;
    flex-shrink: 0;
    padding-top: 2px;
}
.tm-chapter-07-lesson .q-content {
    flex-grow: 1;
    min-width: 0;
    font-size: 17px;
}

/* All grid answer choices are vertical rows. Each row keeps the label and formula/content on the SAME LINE. */
.tm-chapter-07-lesson .grid-2col,
.tm-chapter-07-lesson .grid-3col,
.tm-chapter-07-lesson [class~="grid-2col"],
.tm-chapter-07-lesson [class~="grid-3col"] {
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    grid-template-columns: 1fr !important;
    column-count: 1 !important;
    columns: 1 !important;
    row-gap: 15px !important;
    column-gap: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    margin-top: 15px;
}
.tm-chapter-07-lesson .grid-2col > .sub-q-item,
.tm-chapter-07-lesson .grid-3col > .sub-q-item,
.tm-chapter-07-lesson .sub-q-item {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    align-items: baseline !important;
    justify-content: flex-start !important;
    gap: .65rem !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    float: none !important;
    clear: both !important;
    break-inside: avoid !important;
    white-space: normal !important;
}
.tm-chapter-07-lesson .sub-q-item > strong {
    display: inline-block !important;
    flex: 0 0 2.35rem !important;
    min-width: 2.35rem !important;
    width: 2.35rem !important;
    margin: 0 !important;
    padding: 0 !important;
    line-height: inherit !important;
}
.tm-chapter-07-lesson .sub-q-item > .tm-sub-q-text {
    display: inline !important;
    flex: 1 1 auto !important;
    min-width: 0 !important;
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    line-height: inherit !important;
}

/* Vertical sub-question lists: desktop and mobile must stay stacked. */
.tm-chapter-07-lesson .sub-questions-vertical {
    list-style-type: none;
    padding-left: 20px;
    margin-top: 15px;
    margin-bottom: 15px;
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    row-gap: 15px;
    column-count: 1 !important;
    columns: 1 !important;
    grid-template-columns: 1fr !important;
    width: 100%;
}
.tm-chapter-07-lesson .sub-questions-vertical > li {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    align-items: flex-start;
    width: 100% !important;
    max-width: 100% !important;
    float: none !important;
    break-inside: avoid;
}
.tm-chapter-07-lesson .sub-q-label {
    display: inline-block !important;
    font-weight: bold;
    color: #0f2d69;
    width: 35px;
    min-width: 35px;
    flex: 0 0 35px !important;
    flex-shrink: 0;
}
.tm-chapter-07-lesson .sub-questions-vertical > li > div {
    min-width: 0;
    width: 100%;
}

/* Every second-level or deeper list remains vertical, never columns/grid/row-wrap. */
.tm-chapter-07-lesson ul ul,
.tm-chapter-07-lesson ul ol,
.tm-chapter-07-lesson ol ul,
.tm-chapter-07-lesson ol ol,
.tm-chapter-07-lesson .sub-questions-vertical .sub-questions-vertical {
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    column-count: 1 !important;
    columns: 1 !important;
    grid-template-columns: 1fr !important;
    width: 100% !important;
}
.tm-chapter-07-lesson ul ul > li,
.tm-chapter-07-lesson ul ol > li,
.tm-chapter-07-lesson ol ul > li,
.tm-chapter-07-lesson ol ol > li,
.tm-chapter-07-lesson .sub-questions-vertical .sub-questions-vertical > li {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    width: 100% !important;
    max-width: 100% !important;
    float: none !important;
}

.tm-chapter-07-lesson .bullet-list {
    padding-left: 25px;
    margin-top: 10px;
    margin-bottom: 15px;
}
.tm-chapter-07-lesson .bullet-list li { margin-bottom: 8px; }

.tm-chapter-07-lesson .citation {
    font-style: italic;
    font-size: 14px;
    color: #0f2d69;
    font-weight: bold;
    display: block;
    margin-bottom: 10px;
}
.tm-chapter-07-lesson .warning-text {
    font-weight: bold;
    color: #555;
    margin-bottom: 10px;
    display: block;
}

.tm-chapter-07-lesson .svg-container {
    display: flex !important;
    justify-content: center;
    align-items: center;
    margin: 14px 0 12px !important;
    padding: 0 !important;
    overflow-x: auto;
    overflow-y: visible;
    line-height: 1 !important;
}
.tm-chapter-07-lesson svg {
    overflow: visible !important;
    max-width: 100%;
    height: auto;
}
.tm-chapter-07-lesson .axis-label {
    font-family: 'Times New Roman', Times, serif;
    font-style: italic;
    font-size: 16px;
    font-weight: bold;
}
.tm-chapter-07-lesson .tick-label {
    font-family: 'Times New Roman', Times, serif;
    font-size: 14px;
    font-weight: bold;
}



/* Exam-style SVG spacing fix: keep diagrams close to the exact question text. */
.tm-chapter-07-lesson .question-block.tm-has-svg {
    margin-bottom: 30px !important;
}
.tm-chapter-07-lesson .question-block.tm-has-svg .q-content > .citation {
    margin-bottom: 6px !important;
}
.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + div,
.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + p {
    margin-top: 8px !important;
}
.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + .sub-questions-vertical {
    margin-top: 8px !important;
}
.tm-chapter-07-lesson .svg-container svg {
    display: block !important;
    margin: 0 auto !important;
    max-height: 420px;
}

/* Keep inline MathJax inline. Only display math gets scrolling if needed. */
.tm-chapter-07-lesson mjx-container:not([display="true"]),
.tm-chapter-07-lesson .sub-q-item mjx-container:not([display="true"]),
.tm-chapter-07-lesson .sub-questions-vertical mjx-container:not([display="true"]) {
    display: inline-block !important;
    vertical-align: baseline !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: visible !important;
    max-width: 100% !important;
}
.tm-chapter-07-lesson mjx-container[display="true"] {
    display: block !important;
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
}

@media (max-width: 768px) {
    .tm-chapter-07-lesson .tm-ch7-container,
    .tm-chapter-07-lesson .container {
        padding: 24px 14px;
    }
    .tm-ch7-lesson-banner { padding: 18px; }
}

@media (max-width: 560px) {
    .tm-chapter-07-lesson .svg-container {
        margin: 10px 0 10px !important;
    }
    .tm-chapter-07-lesson .svg-container svg {
        max-height: 360px;
    }

    .tm-chapter-07-lesson .question-block {
        align-items: flex-start;
    }
    .tm-chapter-07-lesson .q-number {
        width: 34px;
        min-width: 34px;
        font-size: 18px;
    }
    .tm-chapter-07-lesson .q-content {
        font-size: 16px;
    }
    .tm-chapter-07-lesson .sub-questions-vertical {
        padding-left: 0;
    }
    .tm-chapter-07-lesson .sub-q-label {
        width: 28px;
        min-width: 28px;
        flex-basis: 28px !important;
    }
    .tm-chapter-07-lesson .sub-q-item > strong {
        flex-basis: 2rem !important;
        min-width: 2rem !important;
        width: 2rem !important;
    }
}



/* v106: safe diagram layout. No negative margins, no overlap with following text. SVG viewBoxes are corrected in the data file instead. */
.tm-chapter-07-lesson .question-block.tm-has-svg {
    margin-bottom: 32px !important;
}
.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container {
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    clear: both !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 10px 0 14px !important;
    padding: 0 !important;
    line-height: 1 !important;
    overflow: visible !important;
}
.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container svg {
    display: block !important;
    position: static !important;
    clear: both !important;
    margin: 0 auto !important;
    max-width: min(100%, 520px) !important;
    width: auto !important;
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
}
.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + div,
.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + p {
    display: block !important;
    clear: both !important;
    margin-top: 12px !important;
    position: relative !important;
    z-index: 1 !important;
}
@media (max-width: 560px) {
    .tm-chapter-07-lesson .question-block.tm-has-svg .svg-container {
        margin: 8px 0 12px !important;
    }
    .tm-chapter-07-lesson .question-block.tm-has-svg .svg-container svg {
        max-width: 100% !important;
    }
}


/* v106 hard override: higher specificity than older v105 CSS, even if old stylesheet is still active. */
section.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container,
.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container {
    margin-top: 10px !important;
    margin-right: 0 !important;
    margin-bottom: 14px !important;
    margin-left: 0 !important;
    padding: 0 !important;
    overflow: visible !important;
    clear: both !important;
}
section.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container svg,
.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container svg {
    display: block !important;
    position: static !important;
    margin: 0 auto !important;
    max-width: min(100%, 520px) !important;
    width: auto !important;
    height: auto !important;
    max-height: none !important;
    overflow: visible !important;
}
section.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + div,
.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + div,
section.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + p,
.tm-imported-lesson.tm-chapter-07-lesson .question-block.tm-has-svg .svg-container + p {
    display: block !important;
    clear: both !important;
    margin-top: 12px !important;
    position: relative !important;
    z-index: 2 !important;
}