.isa-page {
    padding-top: 0.5rem;
}

.isa-page-title {
    margin-bottom: 0.25rem;
}

.isa-page-subtitle {
    color: var(--color-text-dim);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.isa-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 767px) {
    .isa-layout {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.isa-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 1rem);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-dim);
    border-radius: var(--border-radius);
    padding: 1rem;
}

@media (max-width: 767px) {
    .isa-sidebar {
        position: static;
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        align-items: center;
        padding: 0.75rem 1rem;
    }
}

.isa-sidebar-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-dim);
    margin-bottom: 0.5rem;
}

@media (max-width: 767px) {
    .isa-sidebar-title {
        margin-bottom: 0;
        font-size: 0.75rem;
    }
}

.isa-sidebar-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

@media (max-width: 767px) {
    .isa-sidebar-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.35rem;
    }
}

.isa-sidebar-link {
    display: block;
    font-size: 0.88rem;
    color: var(--color-text-dim);
    padding: 0.25rem 0;
    text-decoration: none;
    transition: color 0.15s ease;
}

.isa-sidebar-link:hover {
    color: var(--color-accent);
}

.isa-sidebar-sublist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.05rem;
    padding-left: 0.75rem;
    margin-bottom: 0.25rem;
}

@media (max-width: 767px) {
    .isa-sidebar-sublist {
        display: none;
    }
}

.isa-sidebar-sublink {
    display: block;
    font-size: 0.78rem;
    color: var(--color-text-dim);
    padding: 0.15rem 0;
    text-decoration: none;
    transition: color 0.15s ease;
    opacity: 0.8;
}

.isa-sidebar-sublink:hover {
    color: var(--color-accent);
    opacity: 1;
}

.isa-sidebar-note {
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--color-border-dim);
}

@media (max-width: 767px) {
    .isa-sidebar-note {
        margin-top: 0;
        padding-top: 0;
        border-top: none;
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
}

.isa-cell-size {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-accent);
    margin-bottom: 0.25rem;
}

.isa-note {
    font-size: 0.78rem;
    color: var(--color-text-dim);
}

.isa-section {
    margin-bottom: 2.5rem;
}

.isa-intro {
    color: var(--color-text-dim);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.isa-table-wrap {
    overflow-x: auto;
    margin-bottom: 0.75rem;
    border: 1px solid var(--color-border-dim);
}

.isa-table-wrap .data-table {
    margin-bottom: 0;
}

.constraint-col {
    text-align: center;
    width: 3.5rem;
}

.constraint-cell {
    text-align: center;
}

.reg-special {
    color: var(--color-text-dim);
}

.reg-grid-wrap {
    border: 1px solid var(--color-border-dim);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.reg-grid-header {
    display: grid;
    grid-template-columns: 5rem 1fr 3.5rem 3.5rem 3.5rem 3.5rem 1fr;
    background-color: var(--color-surface);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-bright);
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--color-border-dim);
}

.reg-grid-row {
    display: grid;
    grid-template-columns: 5rem 1fr 3.5rem 3.5rem 3.5rem 3.5rem 1fr;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--color-border-dim);
}

.reg-grid-row:nth-child(even) {
    background-color: var(--color-surface);
}

.reg-grid-row:hover {
    background-color: var(--color-border-dim);
}

.reg-grid-name,
.reg-grid-purpose,
.reg-grid-check,
.reg-grid-notes {
    display: flex;
    align-items: center;
}

.reg-grid-check {
    justify-content: center;
}

.reg-grid-notes {
    font-size: 0.82rem;
    color: var(--color-text-dim);
}

.notes-cell {
    font-size: 0.82rem;
    color: var(--color-text-dim);
    max-width: 14rem;
}

.constraint-yes {
    color: var(--color-green);
    font-weight: 700;
}

.constraint-no {
    color: var(--color-border);
}

.isa-legend {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
    font-size: 0.82rem;
    color: var(--color-text-dim);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.isa-details {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-dim);
    border-radius: var(--border-radius);
    padding: 1.25rem;
}

.isa-details h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-bright);
}

.isa-detail-list {
    list-style: disc;
    padding-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.isa-detail-list li {
    font-size: 0.88rem;
    color: var(--color-text-dim);
    line-height: 1.6;
}

.isa-detail-list strong {
    color: var(--color-text);
}

.isa-detail-list code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    background-color: var(--color-border-dim);
    padding: 0.1rem 0.35rem;
    border-radius: var(--border-radius-sm);
}

.isa-detail-text {
    font-size: 0.88rem;
    color: var(--color-text-dim);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.isa-detail-text:last-child {
    margin-bottom: 0;
}

.isa-detail-text code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    background-color: var(--color-border-dim);
    padding: 0.1rem 0.35rem;
    border-radius: var(--border-radius-sm);
}

@media (max-width: 767px) {
    .isa-page-subtitle {
        font-size: 0.9rem;
    }

    .notes-cell {
        max-width: none;
    }

    .isa-legend {
        flex-direction: column;
        gap: 0.35rem;
    }

    .isa-detail-list li {
        font-size: 0.84rem;
    }
}

.instr-categories {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.instr-category {
    border: 1px solid var(--color-border-dim);
    border-radius: var(--border-radius);
    background-color: var(--color-surface);
}

.instr-category-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: background-color 0.15s ease;
}

.instr-category-summary::-webkit-details-marker {
    display: none;
}

.instr-category-summary::marker {
    content: "";
    display: none;
}

.instr-category[open] > .instr-category-summary {
    border-bottom: 1px solid var(--color-border-dim);
    background-color: var(--color-border-dim);
}

.instr-category-summary:hover {
    background-color: var(--color-border-dim);
}

.instr-category-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-bright);
}

.instr-category-count {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.instr-table {
    margin-bottom: 0;
}

.instr-mnemonic code {
    font-weight: 600;
    color: var(--color-accent);
    min-width: 3rem;
    display: inline-block;
}

.instr-operands code {
    color: var(--color-text-dim);
}

.instr-size-cell {
    text-align: center;
    width: 3rem;
}

.instr-size-col {
    text-align: center;
    width: 3rem;
}

.instr-size {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.1rem 0.4rem;
    border-radius: var(--border-radius-sm);
    text-align: center;
}

.instr-size-1B {
    background-color: rgba(166, 227, 161, 0.15);
    color: var(--color-green);
}

.instr-size-2B {
    background-color: rgba(137, 180, 250, 0.15);
    color: var(--color-accent);
}

.instr-size-4B {
    background-color: rgba(250, 179, 135, 0.15);
    color: var(--color-peach);
}

.instr-desc {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.45;
}

.encoding-notes {
    margin-bottom: 1.5rem;
}

.encoding-notes h3 {
    margin-bottom: 1rem;
}

.encoding-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

@media (max-width: 767px) {
    .encoding-grid {
        grid-template-columns: 1fr;
    }
}

.encoding-card {
    border: 1px solid var(--color-border-dim);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem;
}

.encoding-card h4 {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-accent);
    margin-bottom: 0.35rem;
}

.encoding-card p {
    font-size: 0.82rem;
    color: var(--color-text-dim);
    line-height: 1.5;
}

@media (max-width: 767px) {
    .instr-category-summary {
        padding: 0.65rem 0.85rem;
    }

    .instr-desc {
        font-size: 0.8rem;
    }
}

.isa-subheading {
    font-size: 1.05rem;
    color: var(--color-text-bright);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.mem-addr {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-accent);
    white-space: nowrap;
}

.mem-size {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--color-text-dim);
    white-space: nowrap;
}

.mem-desc {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.45;
}

.mem-rw {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-align: center;
    width: 3rem;
}

.mem-type-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.1rem 0.4rem;
    border-radius: var(--border-radius-sm);
}

.mem-type-ram {
    background-color: rgba(166, 227, 161, 0.15);
    color: var(--color-green);
}

.mem-type-stack {
    background-color: rgba(137, 180, 250, 0.15);
    color: var(--color-accent);
}

.mem-type-io {
    background-color: rgba(250, 179, 135, 0.15);
    color: var(--color-peach);
}

.mem-type-unmapped {
    background-color: rgba(147, 153, 178, 0.15);
    color: var(--color-text-dim);
}

.mem-visual {
    margin-bottom: 1.5rem;
}

.mem-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.85rem;
    border-left: 3px solid transparent;
    font-size: 0.85rem;
}

.mem-bar:first-child {
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
}

.mem-bar:last-of-type {
    border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
}

.mem-bar-ram {
    background-color: rgba(166, 227, 161, 0.08);
    border-left-color: var(--color-green);
}

.mem-bar-stack {
    background-color: rgba(137, 180, 250, 0.08);
    border-left-color: var(--color-accent);
}

.mem-bar-io {
    background-color: rgba(250, 179, 135, 0.08);
    border-left-color: var(--color-peach);
}

.mem-bar-unmapped {
    background-color: rgba(147, 153, 178, 0.05);
    border-left-color: var(--color-text-dim);
}

.mem-bar-label {
    font-weight: 600;
    color: var(--color-text-bright);
}

.mem-bar-range {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-text-dim);
}

.mem-bar-legend {
    display: flex;
    gap: 1rem;
    margin-top: 0.75rem;
    padding-top: 0.5rem;
}

.mem-legend-item {
    font-size: 0.75rem;
    padding: 0.15rem 0.5rem;
    border-radius: var(--border-radius-sm);
}

.mem-legend-item span {
    color: var(--color-text-dim);
}

.stack-frame-table {
    margin-bottom: 1.5rem;
}

.stack-offset code {
    font-size: 0.82rem;
    color: var(--color-accent);
}

.stack-contents code {
    font-size: 0.82rem;
    color: var(--color-text-bright);
}

.stack-desc {
    font-size: 0.85rem;
    color: var(--color-text-dim);
}

.stack-frame-fp {
    border-top: 2px solid var(--color-accent);
    border-bottom: 2px solid var(--color-accent);
}

.stack-frame-sp {
    border-bottom: 2px dashed var(--color-text-dim);
}

.conv-topic {
    white-space: nowrap;
    padding-right: 1rem;
}

.conv-topic strong {
    color: var(--color-text-bright);
}

.conv-detail {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.45;
}

.code-example {
    background-color: var(--color-base);
    border: 1px solid var(--color-border-dim);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    overflow-x: auto;
}

.code-example pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--color-text);
}

.code-example code {
    font-family: var(--font-mono);
}

.am-name strong {
    color: var(--color-text-bright);
}

.am-syntax code {
    color: var(--color-accent);
    font-size: 0.82rem;
}

.am-example code {
    color: var(--color-text-dim);
    font-size: 0.82rem;
}

.am-desc {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    line-height: 1.45;
}

.isa-steps {
    list-style: decimal;
    padding-left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.isa-steps li {
    font-size: 0.88rem;
    color: var(--color-text-dim);
    line-height: 1.5;
    padding-left: 0;
}

.isa-steps li::before {
    content: none;
}

.isa-steps strong {
    color: var(--color-text);
}

.isa-steps code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    background-color: var(--color-border-dim);
    padding: 0.1rem 0.35rem;
    border-radius: var(--border-radius-sm);
}

@media (max-width: 767px) {
    .mem-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }

    .mem-bar-legend {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .conv-topic {
        white-space: normal;
    }
}