/*
 * Simulador de Ponto Flutuante RISC-V
 * Tema claro e tema escuro definidos por variáveis; o tema é escolhido em <html data-theme="light|dark">.
 * Cores de etiquetas (estações, ROB, instruções) chegam pela variável --tag e são misturadas com o fundo.
 */

:root,
[data-theme='light'] {
    --bg: #f8fafc;
    --panel: #ffffff;
    --panel-2: #f2f4f8;
    --line: #b4bfcf;
    --line-strong: #8796ad;
    --ink: #111827;
    --muted: #475266;
    --faint: #667085;
    --accent: #1650ff;
    --accent-ink: #ffffff;
    --accent-soft: #e3ebff;
    --focus: #d99700;
    --focus-soft: #fff3cf;
    --warn: #b23a12;
    --ok: #1d6e42;
    --ok-soft: #d6f0e0;
    --bad-soft: #f8d9d0;
    --wire: #8f9bb0;
    --c-issue: #e3e7fb;
    --c-id: #e7ebf2;
    --c-exec: #d7f0e3;
    --c-mem: #d6eaf6;
    --c-write: #efe0f6;
    --c-commit: #f8ebcc;
    --c-squash: #f6d6d2;
    --c-stall: #fbe5cc;
    --tag-bg: 18%;
    --tag-fg: 75%;
    --shadow: 0 4px 16px rgba(17, 24, 39, 0.10);
    color-scheme: light;
}

[data-theme='dark'] {
    --bg: #000000;
    --panel: #0d0f14;
    --panel-2: #1a1e27;
    --line: #6b7486;
    --line-strong: #9aa3b5;
    --ink: #ffffff;
    --muted: #dde2ea;
    --faint: #b4bccb;
    --accent: #5294ff;
    --accent-ink: #000000;
    --accent-soft: #0f2a5e;
    --focus: #ffd23f;
    --focus-soft: #3d3200;
    --warn: #ff9e7a;
    --ok: #7ef0ad;
    --ok-soft: #0f3a24;
    --bad-soft: #4a1d1d;
    --wire: #7c869a;
    --c-issue: #22306e;
    --c-id: #2a3140;
    --c-exec: #11452c;
    --c-mem: #0f3c57;
    --c-write: #44255a;
    --c-commit: #574300;
    --c-squash: #5c1f22;
    --c-stall: #5a3410;
    --tag-bg: 40%;
    --tag-fg: 75%;
    --shadow: 0 0 0 1px #6b7486;
    color-scheme: dark;
}

:root {
    --sans: 'IBM Plex Sans', system-ui, 'Segoe UI', Roboto, sans-serif;
    --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Consolas, monospace;
    --radius: 6px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    height: 100%;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.4;
}

a {
    color: var(--accent);
}

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

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.screen {
    position: fixed;
    inset: 0;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.icon {
    display: inline-block;
    width: 18px;
    height: 18px;
    background: currentColor;
    -webkit-mask: var(--icon) center / contain no-repeat;
    mask: var(--icon) center / contain no-repeat;
    flex: none;
}

.i-float { --icon: url('../svg/float.svg'); }
.i-close { --icon: url('../svg/close.svg'); }
.i-moon { --icon: url('../svg/moon.svg'); }
.i-sun { --icon: url('../svg/sun.svg'); }

/* Botões */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font: inherit;
    font-size: 0.875rem;
    color: var(--ink);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius);
    padding: 5px 10px;
    cursor: pointer;
    white-space: nowrap;
}

.btn:hover {
    background: var(--panel-2);
    border-color: var(--line);
}

.btn.primary {
    background: var(--accent);
    color: var(--accent-ink);
    font-weight: 600;
}

.btn.primary:hover {
    background: color-mix(in srgb, var(--accent) 88%, var(--ink));
    border-color: transparent;
}

.btn.small {
    font-size: 0.8rem;
    padding: 2px 8px;
    border-color: var(--line);
}

.icon-btn {
    padding: 6px;
}

/* Estrutura ----------------------------------------------------------------------------------------------- */

#header {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 14px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    z-index: 30;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-right: 10px;
    border-right: 1px solid var(--line);
}

.brand-mark {
    width: 26px;
    height: 26px;
    color: var(--accent);
}

.brand-name {
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.brand-name b {
    font-weight: 600;
    color: var(--accent);
}

.actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    min-width: 0;
    overflow-x: auto;
}

.tools {
    display: flex;
    align-items: center;
    gap: 6px;
}

.lang select {
    font: inherit;
    font-size: 0.85rem;
    color: var(--ink);
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 4px 6px;
}

.menu {
    position: relative;
}

.menu .menu-items {
    display: none;
    position: fixed;
    z-index: 60;
    margin-top: 4px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 4px;
    min-width: 260px;
}

.menu.open .menu-items {
    display: flex;
    flex-direction: column;
}

.menu .menu-items button {
    font: inherit;
    font-size: 0.875rem;
    text-align: left;
    color: var(--ink);
    background: none;
    border: 0;
    border-radius: 4px;
    padding: 7px 10px;
    cursor: pointer;
}

.menu .menu-items button:hover {
    background: var(--panel-2);
}

/* Ajuda */

#readme {
    display: none;
    position: fixed;
    inset: 52px 0 0 0;
    overflow: auto;
    z-index: 15;
    background: var(--bg);
    scroll-behavior: smooth;
}

#readme.overlay {
    display: block !important;
    z-index: 40;
}

.help {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 40px;
    max-width: 1180px;
    padding: 24px 32px 80px;
}

.help-toc {
    position: sticky;
    top: 0;
    align-self: start;
    max-height: calc(100vh - 140px);
    overflow: auto;
    padding-top: 4px;
}

.help-search {
    width: 100%;
    font: inherit;
    font-size: 0.875rem;
    color: var(--ink);
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 6px 10px;
}

.help-toc-title {
    margin: 18px 0 6px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--faint);
}

.help-toc ol {
    list-style: none;
    margin: 0;
    padding: 0;
    counter-reset: toc;
}

.help-toc li {
    counter-increment: toc;
}

.help-toc a {
    display: block;
    padding: 5px 10px;
    border-left: 2px solid var(--line);
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
}

.help-toc a::before {
    content: counter(toc) '.';
    display: inline-block;
    width: 2em;
    color: var(--faint);
    font-family: var(--mono);
    font-size: 0.85em;
}

.help-toc a:hover {
    color: var(--ink);
    background: var(--panel-2);
}

.help-toc a.current {
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 600;
}

.help-body {
    max-width: 78ch;
    font-size: 0.95rem;
    line-height: 1.6;
}

.help-head {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    justify-content: space-between;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
}

.help-head h1 {
    font-size: 1.7rem;
    font-weight: 600;
    margin: 0 0 6px;
}

.help-lead {
    margin: 0;
    color: var(--muted);
}

.help-close {
    display: none;
    border-color: var(--line);
}

#readme.overlay .help-close {
    display: inline-flex;
    width: 100%;
    justify-content: center;
    margin-bottom: 10px;
}



.help-section {
    padding-top: 10px;
}

.help-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 30px 0 8px;
    color: var(--ink);
}

.help-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 22px 0 6px;
    color: var(--accent);
}

.help-section ul,
.help-section ol {
    padding-left: 22px;
}

.help-section li {
    margin: 4px 0;
}

.help-section dt {
    font-weight: 600;
    margin-top: 12px;
}

.help-section dd {
    margin: 2px 0 0 0;
    color: var(--ink);
}

.help-section table {
    border-collapse: collapse;
    margin: 10px 0 14px;
    font-size: 0.9rem;
    width: 100%;
}

.help-section th,
.help-section td {
    border-bottom: 1px solid var(--line);
    padding: 6px 10px;
    text-align: left;
    vertical-align: top;
}

.help-section th {
    background: var(--panel-2);
    font-weight: 600;
    color: var(--muted);
    font-size: 0.85rem;
}

.help-section pre {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 12px 14px;
    overflow: auto;
    font-size: 0.85rem;
    line-height: 1.5;
}

.help-section pre code {
    background: none;
    border: 0;
    padding: 0;
}

.help-section p.tip {
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
    padding: 8px 12px;
}

.help-empty {
    margin-top: 30px;
    color: var(--muted);
}

kbd {
    font-family: var(--mono);
    font-size: 0.82em;
    background: var(--panel);
    border: 1px solid var(--line-strong);
    border-bottom-width: 2px;
    border-radius: 4px;
    padding: 0 5px;
    white-space: nowrap;
}

#readme code,
.dialog code,
.errors code {
    font-family: var(--mono);
    font-size: 0.9em;
    background: var(--panel-2);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 0 4px;
}

@media (max-width: 860px) {
    .help {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 16px;
    }

    .help-toc {
        position: static;
        max-height: none;
    }
}


/* Cores próprias deste simulador ------------------------------------------------------------------------- */

:root,
[data-theme='light'] {
    --c-sign: #1f5fae;
    --c-sign-bg: #dbe8fa;
    --c-exp: #1d7a46;
    --c-exp-bg: #d6f1e0;
    --c-frac: #b4501f;
    --c-frac-bg: #fbe1d5;
    --c-grs: #9a6a00;
    --c-grs-bg: #fbecc4;
    --series-1: #2a78d6;
    --series-2: #eb6834;
    --series-3: #1baf7a;
}

[data-theme='dark'] {
    --c-sign: #8fb8f2;
    --c-sign-bg: #20324f;
    --c-exp: #7fd6a2;
    --c-exp-bg: #1c3a2a;
    --c-frac: #f2a27e;
    --c-frac-bg: #45291f;
    --c-grs: #f0c75e;
    --c-grs-bg: #3f3418;
    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
}

body {
    min-height: 100%;
    height: auto;
}

/* Abas das vistas */

.views {
    display: flex;
    gap: 2px;
    flex: 1;
    min-width: 0;
    overflow-x: auto;
}

.view-tab {
    font: inherit;
    font-size: 0.9rem;
    color: var(--muted);
    background: none;
    border: 0;
    border-bottom: 2px solid transparent;
    padding: 8px 12px 6px;
    cursor: pointer;
    white-space: nowrap;
}

.view-tab:hover {
    color: var(--ink);
}

.view-tab.cur {
    color: var(--ink);
    font-weight: 600;
    border-bottom-color: var(--accent);
}

.menu .menu-items p {
    margin: 6px 10px;
}

/* Conteúdo */

#main {
    max-width: 1180px;
    margin: 0 auto;
    padding: 16px 16px 48px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px 16px;
    margin-bottom: 14px;
    min-width: 0;
}

.card h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 10px;
}

.card h2 .sub,
.sub {
    font-weight: 400;
    font-size: 0.82rem;
    color: var(--muted);
}

.grid2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 14px;
}

.span2 {
    grid-column: span 2;
}

.row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    align-items: flex-end;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 3px;
    font-size: 0.8rem;
    color: var(--muted);
}

.field.grow {
    flex: 1 1 180px;
}

.field input,
.field select {
    font: inherit;
    font-size: 0.95rem;
    color: var(--ink);
    background: var(--panel);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    padding: 6px 8px;
    min-width: 0;
}

.field input {
    font-family: var(--mono);
}

.field input.bad {
    border-color: var(--warn);
}

.field.check {
    flex-direction: row;
    align-items: center;
    gap: 6px;
    color: var(--ink);
    font-size: 0.88rem;
    padding-bottom: 8px;
}

.hint,
.lead {
    font-size: 0.85rem;
    color: var(--muted);
    margin: 10px 0 0;
}

.lead {
    color: var(--ink);
    margin: 0 0 12px;
}

.chip {
    font: inherit;
    font-size: 0.78rem;
    font-family: var(--mono);
    color: var(--ink);
    background: var(--panel-2);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 1px 9px;
    margin: 2px 2px;
    cursor: pointer;
}

.chip:hover {
    border-color: var(--accent);
}

.note {
    font-size: 0.88rem;
    margin: 8px 0 0;
}

.note.warn,
.warn,
.bad {
    color: var(--warn);
}

.ok {
    color: var(--ok);
}

.dim {
    color: var(--faint);
}

.mono {
    font-family: var(--mono);
    font-size: 0.88rem;
}

.wrap {
    word-break: break-all;
}

.scroll {
    overflow-x: auto;
}

code {
    font-size: 0.9em;
}

button.link {
    font: inherit;
    color: var(--accent);
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* Tabelas */

table.kv,
table.data {
    border-collapse: collapse;
    font-size: 0.88rem;
    width: 100%;
}

table.kv th {
    text-align: left;
    font-weight: 500;
    color: var(--muted);
    padding: 4px 12px 4px 0;
    width: 38%;
    vertical-align: top;
}

table.kv td {
    padding: 4px 0;
}

table.data th,
table.data td {
    padding: 5px 10px 5px 0;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

table.data tr:first-child th {
    font-weight: 500;
    color: var(--muted);
    font-size: 0.8rem;
    border-bottom-color: var(--line-strong);
}

table.data td.num {
    font-family: var(--mono);
    font-size: 0.85rem;
}

table.data tr.cur th,
table.data tr.cur td {
    background: var(--accent-soft);
}

table.data tr:last-child td,
table.data tr:last-child th {
    border-bottom: 0;
}

/* Flags */

.flags {
    display: inline-flex;
    gap: 3px;
}

.flag {
    font-family: var(--mono);
    font-size: 0.72rem;
    padding: 0 5px;
    border-radius: 4px;
    color: var(--faint);
    border: 1px solid var(--line);
}

.flag.on {
    color: var(--warn);
    background: var(--bad-soft);
    border-color: transparent;
    font-weight: 600;
}

/* Bits */

.bits {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    font-family: var(--mono);
}

.bit {
    width: 26px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font: inherit;
    font-size: 1rem;
    border-radius: 4px;
    border: 1px solid transparent;
    padding: 0;
}

.bits.wide .bit {
    width: 15px;
    height: 28px;
    font-size: 0.8rem;
}

button.bit {
    cursor: pointer;
}

button.bit:hover {
    border-color: var(--ink);
}

.bit.first:not(:first-child) {
    margin-left: 8px;
}

.bit.sign { color: var(--c-sign); background: var(--c-sign-bg); }
.bit.exp, .bit.int { color: var(--c-exp); background: var(--c-exp-bg); }
.fx-point { align-self: flex-end; padding: 0 1px; font-weight: 700; font-size: 1.2em; line-height: 1; color: var(--ink); }
.bit.frac { color: var(--c-frac); background: var(--c-frac-bg); }
.bit.one { font-weight: 600; }
.bit:not(.one) { opacity: 0.72; }

.bit-legend {
    display: flex;
    gap: 14px;
    font-size: 0.78rem;
    margin-top: 5px;
}

.bit-legend .sign { color: var(--c-sign); }
.bit-legend .exp, .bit-legend .int { color: var(--c-exp); }
.bit-legend .frac { color: var(--c-frac); }

code.c-sign { color: var(--c-sign); }
code.c-exp { color: var(--c-exp); }
code.c-frac { color: var(--c-frac); }

.hexrow {
    margin-top: 12px;
    align-items: center;
}

.hexrow .field input {
    width: 20ch;
}

.result-big {
    font-family: var(--mono);
    font-size: 1.35rem;
    font-weight: 500;
}

.formula {
    font-family: var(--mono);
    font-size: 0.9rem;
    background: var(--panel-2);
    border-radius: 6px;
    padding: 8px 10px;
    margin: 10px 0 0;
    word-break: break-all;
}

details summary {
    cursor: pointer;
}

/* Reta numérica */

.numberline svg {
    width: 100%;
    height: auto;
    display: block;
    font-family: var(--mono);
}

.nl-axis { stroke: var(--line-strong); stroke-width: 1.5; }
.nl-tick { stroke: var(--faint); stroke-width: 1.5; }
.nl-tick.near { stroke: var(--ink); stroke-width: 2; }
.nl-val { fill: var(--muted); font-size: 11px; }
.nl-val.near { fill: var(--ink); font-size: 13px; font-weight: 500; }
.nl-hex { fill: var(--faint); font-size: 10px; }
.nl-mode rect { fill: var(--accent-soft); }
.nl-mode text { fill: var(--accent); font-size: 10px; font-weight: 600; }
.nl-mid { stroke: var(--faint); stroke-dasharray: 3 3; }
.nl-midlabel { fill: var(--faint); font-size: 10px; font-family: var(--sans); }
.nl-x path { fill: var(--warn); }
.nl-x line { stroke: var(--warn); stroke-width: 1.5; }
.nl-x text { fill: var(--warn); font-size: 12px; font-weight: 600; }

/* Passos do hardware */

ol.steps {
    margin: 0;
    padding-left: 22px;
}

ol.steps > li {
    padding: 8px 0;
    border-bottom: 1px solid var(--line);
}

ol.steps > li:last-child {
    border-bottom: 0;
}

.st-text {
    font-size: 0.9rem;
}

table.regs {
    margin-top: 6px;
    border-collapse: collapse;
    font-family: var(--mono);
    font-size: 0.85rem;
}

table.regs th {
    font-family: var(--sans);
    font-weight: 500;
    color: var(--muted);
    text-align: right;
    padding: 1px 10px 1px 0;
    white-space: nowrap;
}

table.regs td {
    padding: 1px 6px 1px 0;
}

table.regs td.e {
    color: var(--muted);
    white-space: nowrap;
}

.reg {
    word-break: break-all;
}

.reg .int {
    color: var(--c-sign);
    font-weight: 600;
}

.reg .grs {
    margin-left: 4px;
    padding: 0 2px;
    border-radius: 3px;
    color: var(--c-grs);
    background: var(--c-grs-bg);
    font-weight: 600;
}

/* Experimentos */

.exp-layout {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
}

.exp-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.exp-item {
    display: block;
    width: 100%;
    text-align: left;
    font: inherit;
    color: var(--ink);
    background: none;
    border: 0;
    border-radius: 6px;
    padding: 8px 10px;
    cursor: pointer;
}

.exp-item b {
    display: block;
    font-weight: 500;
    font-size: 0.92rem;
}

.exp-item span {
    font-size: 0.78rem;
    color: var(--muted);
}

.exp-item:hover {
    background: var(--panel-2);
}

.exp-item.cur {
    background: var(--accent-soft);
}

/* Gráficos */

.chart {
    position: relative;
    margin: 0;
}

.chart svg {
    width: 100%;
    height: auto;
    display: block;
    font-family: var(--sans);
}

.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { stroke: var(--line-strong); stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11px; }
.chart .label { fill: var(--muted); font-size: 11px; }
.chart .val { fill: var(--ink); font-size: 11px; }
.chart path.series { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart path.series.s1 { stroke: var(--series-1); }
.chart path.series.s2 { stroke: var(--series-2); }
.chart path.series.s3 { stroke: var(--series-3); }
.chart.bars path.series { fill: var(--series-1); stroke: none; }
.chart .cross { stroke: var(--muted); stroke-width: 1; }
.chart .hit { fill: transparent; }
.chart .bar:focus { outline: none; }
.chart .bar:focus path { stroke: var(--ink); stroke-width: 1.5; }

.legend {
    display: flex;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--muted);
    margin-bottom: 4px;
}

.sw {
    display: inline-block;
    width: 14px;
    height: 3px;
    border-radius: 2px;
    vertical-align: middle;
    margin-right: 6px;
}

.sw.s1 { background: var(--series-1); }
.sw.s2 { background: var(--series-2); }
.sw.s3 { background: var(--series-3); }

.chart .tip {
    position: absolute;
    pointer-events: none;
    background: var(--panel);
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    box-shadow: var(--shadow);
    padding: 6px 9px;
    font-size: 0.8rem;
    color: var(--ink);
    white-space: nowrap;
}

.chart .tip .tip-head {
    color: var(--muted);
    margin-bottom: 2px;
}

.chart .tip b {
    font-family: var(--mono);
    font-weight: 600;
}

.chart .hidden {
    display: none;
}

/* Aritmética inteira */

.result-line {
    font-size: 1rem;
    margin: 0;
}

table.steps-int td.mono {
    white-space: nowrap;
}

table.steps-int td.chg {
    color: var(--accent);
    font-weight: 600;
}

table.steps-int tr.iter th,
table.steps-int tr.iter td {
    border-top: 1px solid var(--line-strong);
}

table.steps-int td.st {
    font-size: 0.85rem;
    min-width: 240px;
}

.gap {
    display: inline-block;
    width: 6px;
}

table.adder {
    border-collapse: collapse;
    font-size: 1.05rem;
    margin-bottom: 10px;
}

table.adder th {
    font-family: var(--sans);
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--muted);
    text-align: right;
    padding: 2px 12px 2px 0;
}

table.adder td {
    padding: 2px 14px 2px 0;
    letter-spacing: 0.12em;
}

table.adder tr.carry td {
    color: var(--c-grs);
    font-size: 0.85rem;
}

table.adder tr.sum td {
    border-top: 2px solid var(--ink);
    font-weight: 600;
}

/* Exercícios */

.chips {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 6px;
    margin-top: 10px;
}

.chips-label {
    font-size: 0.8rem;
    color: var(--muted);
    width: 90px;
}

.check-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.84rem;
    background: var(--panel-2);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 2px 10px 2px 6px;
    cursor: pointer;
}

ol.questions {
    padding-left: 22px;
    margin: 0 0 12px;
}

ol.questions > li {
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}

ol.questions p {
    margin: 0 0 6px;
}

.answer-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.answer-row input {
    font-family: var(--mono);
    font-size: 0.92rem;
    color: var(--ink);
    background: var(--panel);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    padding: 5px 8px;
    width: 22ch;
}

.verdict.ok { color: var(--ok); font-weight: 600; }
.verdict.bad { color: var(--warn); font-weight: 600; }

.solution {
    font-size: 0.88rem;
    background: var(--panel-2);
    border-radius: 6px;
    padding: 6px 10px;
    margin-top: 8px !important;
}

.score {
    font-weight: 600;
}

@media (max-width: 860px) {
    .grid2 {
        grid-template-columns: minmax(0, 1fr);
    }

    .span2 {
        grid-column: auto;
    }

    .exp-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    #header {
        flex-wrap: wrap;
        gap: 6px 10px;
    }

    .brand {
        border-right: 0;
    }

    .views {
        order: 3;
        flex-basis: 100%;
    }

    #readme {
        inset: 96px 0 0 0;
    }
}

.lg-note {
    margin-left: auto;
    font-size: 0.78rem;
    color: var(--faint);
}

/* Explicação dos modos de arredondamento */

.xbits {
    background: var(--panel-2);
    border-radius: 6px;
    padding: 10px 12px;
    overflow-x: auto;
}

.xb-line {
    font-size: 1rem;
    white-space: nowrap;
    letter-spacing: 0.04em;
}

.xb-kept {
    color: var(--c-frac);
}

.xb-int {
    color: var(--c-sign);
    font-weight: 600;
}

.xb-cut {
    color: var(--warn);
    font-weight: 700;
    margin: 0 3px;
}

.xb-drop {
    color: var(--faint);
}

.xb-g,
.xb-r {
    color: var(--c-grs);
    background: var(--c-grs-bg);
    border-radius: 3px;
    padding: 0 1px;
}

.xb-s {
    text-decoration: underline dotted var(--c-grs);
    text-underline-offset: 3px;
}

.xb-exp {
    color: var(--muted);
}

.xb-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    margin-top: 6px;
    font-family: var(--sans);
    font-size: 0.78rem;
}

table.why td:last-child {
    font-size: 0.87rem;
}

table.why th:first-child {
    width: 52px;
}