/* KOSTON · estilo comum das calculadoras (koston.com.br/calculadora/)
   Tema claro é o padrão. O escuro só entra quando o visitante aperta o botão (data-tema="escuro"). */
:root {
  --surface: #F7F4EE;
  --raised: #FFFFFF;
  --ink: #161B33;
  --muted: #4A5480;
  --border: #DDE3E9;
  --table-head: #DDE3E9;
  --gold: #E6AF2E;
  --gold-text: #7A5A06;
  --gold-soft: #F5E3B3;
  --positive: #476652;
  --positive-soft: #E3ECE5;
  --negative: #B3473C;
  --seg-stock: #2A3156;
  --seg-recv: #9FB1BC;
  --seg-supp: #8FA897;
  --track: #ECE7DD;
  --btn-bg: #161B33;
  --btn-ink: #F7F4EE;
  --cta-bg: #161B33;
  --cta-ink: #F7F4EE;
  --cta-muted: #C5D0D8;
  --focus-outer: #161B33;
  --shadow: 0 1px 2px rgba(22, 27, 51, .06), 0 2px 8px rgba(22, 27, 51, .05);
  --font-head: "Montserrat", system-ui, sans-serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --r-sm: 4px; --r-md: 8px; --r-lg: 16px;
  color-scheme: light;
}
:root[data-tema="escuro"] {
  --surface: #161B33; --raised: #20264A; --ink: #F7F4EE; --muted: #9FB1BC; --border: #353E6A;
  --table-head: #2A3156; --gold-text: #E6AF2E; --gold-soft: #3A3628; --positive: #8FA897;
  --positive-soft: #263A30; --negative: #E08A80; --seg-stock: #DDE3E9; --seg-recv: #6B779F;
  --seg-supp: #8FA897; --track: #2A3156; --btn-bg: #F7F4EE; --btn-ink: #161B33;
  --cta-bg: #2A3156; --cta-ink: #F7F4EE; --cta-muted: #9FB1BC; --focus-outer: #F7F4EE;
  --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body {
  background: var(--surface); color: var(--ink);
  font-family: var(--font-body); font-size: 16px; line-height: 24px;
  -webkit-text-size-adjust: 100%;
}
.wrap {
  max-width: 1120px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 20px 64px;
  display: flex; flex-direction: column; gap: 40px;
}
h1, h2, h3 { font-family: var(--font-head); font-weight: 300; margin: 0; text-wrap: balance; }
p { margin: 0; }
a { color: inherit; }
.num { font-variant-numeric: tabular-nums; }

/* Barra superior: trilha de navegação e botão de tema */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.trail { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; font-size: 14px; color: var(--muted); }
.trail li + li::before { content: "›"; margin-right: 6px; }
.trail a { text-decoration: none; }
.trail a:hover { text-decoration: underline; }
.tema-toggle {
  font: inherit; font-size: 14px; font-weight: 600; color: var(--ink);
  background: var(--raised); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 6px 12px; min-height: 40px; cursor: pointer; display: inline-flex; align-items: center; gap: 8px;
}
.tema-toggle svg { width: 16px; height: 16px; }

/* Cabeçalho */
.intro { display: flex; flex-direction: column; gap: 12px; max-width: 760px; }
.eyebrow {
  font-family: var(--font-head); font-size: 12px; line-height: 16px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--muted); display: flex; align-items: center; gap: 12px;
}
.eyebrow::before { content: ""; width: 32px; height: 2px; background: var(--gold); }
.intro h1 { font-size: clamp(26px, 4vw, 36px); line-height: 1.25; letter-spacing: .06em; }
.intro p { color: var(--muted); max-width: 62ch; }

/* Grade principal */
.grid { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 32px; align-items: start; }
@media (max-width: 880px) { .grid { grid-template-columns: minmax(0, 1fr); } }

/* Painel de entradas */
.panel {
  background: var(--raised); border: 1px solid var(--border); border-radius: var(--r-lg);
  box-shadow: var(--shadow); padding: 24px; display: flex; flex-direction: column; gap: 20px;
}
@media (min-width: 881px) { .panel { position: sticky; top: calc(16px + env(safe-area-inset-top, 0px)); } }
.panel-head { display: flex; flex-direction: column; gap: 6px; }
.panel-head h2, .section-head h2 { font-size: 18px; line-height: 26px; font-weight: 400; letter-spacing: .08em; text-transform: uppercase; }
.example-note {
  font-size: 13px; line-height: 18px; color: var(--gold-text); background: var(--gold-soft);
  border-radius: var(--r-sm); padding: 6px 10px; align-self: flex-start;
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field label, .field .label-text { font-weight: 600; font-size: 15px; line-height: 20px; }
.field .hint { font-size: 13px; line-height: 18px; color: var(--muted); }
.field .err { font-size: 13px; line-height: 18px; color: var(--negative); }
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap .affix { position: absolute; font-size: 15px; color: var(--muted); pointer-events: none; }
.input-wrap .pre { left: 12px; }
.input-wrap .suf { right: 12px; }
input[type="text"] {
  width: 100%; font: inherit; font-size: 17px; font-variant-numeric: tabular-nums; color: var(--ink);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 10px 12px; min-height: 44px;
}
input.has-pre { padding-left: 40px; }
input.has-suf { padding-right: 96px; }
input.has-suf-sm { padding-right: 48px; }
input[aria-invalid="true"] { border-color: var(--negative); }
input:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 2px solid var(--gold); outline-offset: 2px; box-shadow: 0 0 0 4px var(--focus-outer);
}
.row-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.row-3 .field label { font-size: 14px; }
@media (max-width: 420px) { .row-3 { grid-template-columns: minmax(0, 1fr); } }
.divider { height: 1px; background: var(--border); }
.seg { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--border); border-radius: var(--r-md); padding: 3px; gap: 3px; background: var(--surface); }
.seg button {
  font: inherit; font-size: 14px; font-weight: 600; border: 0; border-radius: 6px; padding: 8px 6px;
  background: transparent; color: var(--muted); cursor: pointer; min-height: 40px;
}
.seg button[aria-pressed="true"] { background: var(--btn-bg); color: var(--btn-ink); }

/* Resultados */
.results { display: flex; flex-direction: column; gap: 40px; min-width: 0; transition: opacity .2s; }
.results.stale { opacity: .45; }
.section { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.section-head { display: flex; flex-direction: column; gap: 4px; }
.section-head p { color: var(--muted); font-size: 15px; max-width: 62ch; }

.kpis {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  background: var(--raised); border: 1px solid var(--border); border-radius: var(--r-lg); box-shadow: var(--shadow);
}
.kpi { padding: 20px 24px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.kpi + .kpi { border-left: 1px solid var(--border); }
.kpi .label { font-family: var(--font-head); font-size: 12px; line-height: 16px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.kpi .value { font-size: 28px; line-height: 34px; font-weight: 600; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.kpi .sub { font-size: 14px; line-height: 20px; color: var(--muted); }
.kpi.cost { box-shadow: inset 0 3px 0 var(--gold); border-radius: 0 var(--r-lg) var(--r-lg) 0; }
@media (max-width: 640px) {
  .kpis { grid-template-columns: minmax(0, 1fr); }
  .kpi + .kpi { border-left: 0; border-top: 1px solid var(--border); }
  .kpi.cost { border-radius: 0 0 var(--r-lg) var(--r-lg); }
}

/* Linha do tempo */
.timeline { display: flex; flex-direction: column; gap: 14px; }
.tl-row { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 16px; align-items: center; }
.tl-label { font-size: 14px; line-height: 20px; }
.tl-label strong { font-weight: 600; font-variant-numeric: tabular-nums; }
.tl-label span { display: block; color: var(--muted); font-size: 13px; line-height: 18px; }
.track { position: relative; height: 18px; background: var(--track); border-radius: var(--r-sm); overflow: hidden; }
.seg-bar { position: absolute; top: 0; bottom: 0; }
.seg-bar.stock { background: var(--seg-stock); }
.seg-bar.recv { background: var(--seg-recv); }
.seg-bar.supp { background: var(--seg-supp); }
.seg-bar.gap { background: var(--gold); }
.seg-bar.slack { background: var(--seg-supp); background-image: repeating-linear-gradient(45deg, transparent 0 4px, rgba(255,255,255,.35) 4px 7px); }
.axis { position: relative; height: 20px; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.axis .tick { position: absolute; top: 0; transform: translateX(-50%); white-space: nowrap; }
.axis .tick.first { transform: none; }
.axis .tick.last { transform: translateX(-100%); }
.tl-legend { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 13px; color: var(--muted); }
.tl-legend i { display: inline-block; width: 12px; height: 12px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }
@media (max-width: 640px) { .tl-row { grid-template-columns: minmax(0, 1fr); gap: 6px; } }

/* Tabelas */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--r-md); background: var(--raised); }
table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 20px; font-variant-numeric: tabular-nums; }
th { text-align: left; font-weight: 600; background: var(--table-head); padding: 10px 14px; white-space: nowrap; }
td { padding: 12px 14px; border-top: 1px solid var(--border); vertical-align: top; }
td.r, th.r { text-align: right; white-space: nowrap; }
td .how { display: block; color: var(--muted); font-size: 13px; }
tr.total td { border-top: 2px solid var(--gold); font-weight: 600; }
.pos { color: var(--positive); }
.neg { color: var(--negative); }

/* Simulação */
.sim { background: var(--positive-soft); border-radius: var(--r-lg); padding: 24px; display: flex; flex-direction: column; gap: 20px; }
.sim input[type="text"] { background: var(--raised); }
.sim-out { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.sim-out div { display: flex; flex-direction: column; gap: 2px; }
.sim-out .label { font-family: var(--font-head); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.sim-out .value { font-size: 22px; line-height: 28px; font-weight: 600; font-variant-numeric: tabular-nums; }
.sim-sentence { font-size: 17px; line-height: 26px; max-width: 62ch; }
@media (max-width: 640px) { .sim-out { grid-template-columns: minmax(0, 1fr); } }

/* Chamada */
.cta { background: var(--cta-bg); color: var(--cta-ink); border-radius: var(--r-lg); padding: 32px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }
.cta > div { display: flex; flex-direction: column; gap: 8px; max-width: 56ch; min-width: 0; }
.cta h2 { font-size: 22px; line-height: 30px; letter-spacing: .04em; }
.cta p { color: var(--cta-muted); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-gold, .btn-ghost {
  text-decoration: none; font-weight: 600; padding: 12px 20px; border-radius: var(--r-md); white-space: nowrap; min-height: 44px; display: inline-flex; align-items: center;
}
.btn-gold { background: var(--gold); color: #161B33; }
.btn-ghost { border: 1px solid var(--cta-muted); color: var(--cta-ink); }

/* Texto de apoio (SEO) */
.article { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 300px); gap: 48px; align-items: start; border-top: 1px solid var(--border); padding-top: 40px; }
@media (max-width: 880px) { .article { grid-template-columns: minmax(0, 1fr); gap: 32px; } }
.prose { display: flex; flex-direction: column; gap: 16px; max-width: 68ch; min-width: 0; }
.prose h2 { font-size: 24px; line-height: 32px; font-weight: 400; letter-spacing: .04em; margin-top: 16px; }
.prose h2:first-child { margin-top: 0; }
.prose ul { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 8px; }
.formula { font-variant-numeric: tabular-nums; background: var(--raised); border: 1px solid var(--border); border-radius: var(--r-md); padding: 12px 16px; font-weight: 600; }
.aside { display: flex; flex-direction: column; gap: 12px; position: sticky; top: calc(16px + env(safe-area-inset-top, 0px)); }
.aside h2 { font-size: 14px; line-height: 20px; font-weight: 400; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.aside ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.aside a { display: block; text-decoration: none; padding: 10px 0; border-bottom: 1px solid var(--border); }
.aside a:hover { color: var(--gold-text); }
@media (max-width: 880px) { .aside { position: static; } }
.faq { display: flex; flex-direction: column; }
.faq details { border-top: 1px solid var(--border); padding-block: 14px; }
.faq details:last-child { border-bottom: 1px solid var(--border); }
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; }
.faq details p { padding-top: 8px; color: var(--muted); }
.disclaimer { font-size: 13px; line-height: 18px; color: var(--muted); max-width: 80ch; }

/* Índice de calculadoras */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 20px; }
.card {
  background: var(--raised); border: 1px solid var(--border); border-radius: var(--r-lg); box-shadow: var(--shadow);
  padding: 24px; text-decoration: none; display: flex; flex-direction: column; gap: 10px; min-width: 0;
}
.card:hover { border-color: var(--gold); }
.card .tag { font-family: var(--font-head); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--gold-text); }
.card h2 { font-size: 20px; line-height: 28px; font-weight: 400; letter-spacing: .04em; }
.card p { color: var(--muted); }
.card .go { font-weight: 600; margin-top: auto; padding-top: 8px; }

@media (prefers-reduced-motion: reduce) { .results { transition: none; } }