:root {
  --bg: #0d0d0f;
  --calc-body: #232323;
  --calc-body-2: #1a1a1a;
  --screen-bg: #a9c0a8;
  --screen-fg: #14251a;
  --key-bg: #3a3a3d;
  --key-fg: #f2f2f2;
  --key-bg-hover: #48484c;
  --key-fin: #d98a2b;
  --key-fin-fg: #241300;
  --key-stat: #2f6fb0;
  --key-stat-fg: #eaf3ff;
  --key-op: #555559;
  --key-enter: #d98a2b;
  --panel-bg: #191919;
  --panel-border: #2e2e2e;
  --accent: #d98a2b;
  --text-dim: #9a9a9a;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(0,0,0,.45);
  font-size: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: radial-gradient(ellipse at top, #1c1c20 0%, var(--bg) 65%);
  color: var(--key-fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

button { font-family: inherit; }

.app-shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

/* ---------- workspace ---------- */
.workspace {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.calculator {
  width: 100%;
  max-width: 1100px;
  display: flex;
}

.calc-body {
  background: linear-gradient(180deg, var(--calc-body), var(--calc-body-2));
  border-radius: 18px;
  padding: 14px 18px 10px;
  box-shadow: var(--shadow);
  border: 1px solid #000;
  display: flex;
  flex-direction: column;
  width: 100%;
}

/* ---------- marca e assinatura (integradas ao corpo da calculadora) ---------- */
.calc-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2px 8px;
  flex: 0 0 auto;
}
.calc-brand-name {
  font-size: .72rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: .02em;
}
.app-title-mark {
  color: var(--accent);
  font-weight: 800;
  margin-right: 5px;
}
.calc-brand-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.only-mobile { display: none; }
.btn-icon {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--key-fg);
  padding: 5px 10px;
  border-radius: 7px;
  cursor: pointer;
  font-size: .72rem;
  line-height: 1;
}
.btn-icon.muted { opacity: .45; }

/* trio de teclas para trocar de calculadora — a ativa fica com efeito de
   "pressionada" (fundo aceso, sombra interna), como uma tecla real presa */
.mode-switch {
  display: flex;
  gap: 3px;
  background: #111;
  border: 1px solid var(--panel-border);
  border-radius: 7px;
  padding: 2px;
}
.btn-mode {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--key-fg);
  padding: 4px 8px;
  border-radius: 5px;
  cursor: pointer;
  font-size: .78rem;
  line-height: 1;
  opacity: .55;
}
.btn-mode.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1206;
  opacity: 1;
  box-shadow: inset 0 2px 3px rgba(0,0,0,.4);
}
.calc-signature {
  flex: 0 0 auto;
  text-align: center;
  font-size: .62rem;
  color: #55555a;
  letter-spacing: .1em;
  opacity: .7;
  padding: 6px 0 2px;
}

.display-row {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  margin-bottom: 16px;
  align-items: stretch;
}

.display-unit {
  background: #111;
  border-radius: 10px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.display-annunciators {
  display: flex;
  flex-wrap: nowrap;
  white-space: nowrap;
  overflow: hidden;
  gap: 11px;
  font-size: .62rem;
  letter-spacing: .08em;
  color: #4a4a4a;
  font-weight: 700;
  padding-left: 2px;
}
.ann.active { color: var(--accent); }
.ann-error { color: #444; }
.ann-error.active { color: #e05252; }

.display-screen {
  background: linear-gradient(180deg, var(--screen-bg), #96ab94);
  border-radius: 6px;
  padding: 10px 14px;
  min-height: 78px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: inset 0 2px 6px rgba(0,0,0,.35);
  overflow: hidden;
}
.status-msg {
  font-size: .68rem;
  color: #2c3d2b;
  min-height: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.main-display {
  font-family: "Consolas", "SFMono-Regular", "DejaVu Sans Mono", Menlo, monospace;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--screen-fg);
  text-align: right;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: clip;
}
/* rtl só no modo científico: o visor ali mostra sempre um único número
   contínuo (dígitos sendo digitados), e o truque de rtl garante que o
   corte por overflow aconteça do lado esquerdo (dígitos mais antigos),
   mantendo os dígitos recém-digitados visíveis à direita. Nos modos
   normal/horas o visor mostra uma EXPRESSÃO (com parênteses, operadores
   em ordem), e rtl bagunça a ordem de leitura via bidi do navegador —
   por isso fica de fora desses modos. */
.calc-body[data-mode="cientifica"] .main-display { direction: rtl; }

.display-regs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  font-size: .68rem;
  color: var(--text-dim);
  padding-left: 2px;
}
.display-regs b { color: #d8d8d8; font-weight: 600; }

/* ---------- shortcuts panel ---------- */
.shortcuts-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}
.shortcuts-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px 6px;
}
.shortcuts-header h2 {
  font-size: .85rem;
  margin: 0;
  color: var(--key-fg);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.shortcuts-search {
  padding: 0 12px 8px;
}
.shortcuts-search input {
  width: 100%;
  background: #101010;
  border: 1px solid #2c2c2c;
  color: var(--key-fg);
  border-radius: 6px;
  padding: 7px 9px;
  font-size: .8rem;
}
.shortcuts-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 160px;
  max-height: 360px;
}
.shortcut-card {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #202020;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  padding: 8px 9px;
  cursor: pointer;
  transition: background .15s;
}
.shortcut-card:hover { background: #262626; border-color: #3a3a3a; }
.shortcut-icon { font-size: 1.1rem; width: 22px; text-align: center; flex-shrink: 0; }
.shortcut-name {
  flex: 1;
  min-width: 0;
  font-size: .8rem;
  line-height: 1.25;
  color: var(--key-fg);
  /* nomes longos quebram em até 2 linhas, em vez de ficarem cortados */
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  overflow-wrap: anywhere;
}
.shortcut-star {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  color: #555;
  padding: 2px 4px;
  flex-shrink: 0;
}
.shortcut-star.active { color: var(--accent); }
.shortcut-del {
  background: none;
  border: none;
  cursor: pointer;
  color: #666;
  font-size: .85rem;
  padding: 2px 4px;
  flex-shrink: 0;
}
.shortcut-del:hover { color: #e05252; }
.shortcuts-group-label {
  font-size: .62rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #666;
  margin: 8px 2px 2px;
}
.shortcuts-empty {
  color: #666;
  font-size: .78rem;
  padding: 10px 4px;
  text-align: center;
}
.btn-new-shortcut {
  margin: 8px 10px 10px;
  background: var(--accent);
  color: #221000;
  border: none;
  border-radius: 8px;
  padding: 9px;
  font-weight: 700;
  font-size: .8rem;
  cursor: pointer;
}
.btn-new-shortcut:hover { filter: brightness(1.08); }

/* ---------- keypad ---------- */
.keypad {
  display: flex;
  flex-direction: column;
  gap: 9px;
  touch-action: manipulation;
  -webkit-touch-callout: none;
  user-select: none;
}
.keypad-functions, .keypad-numeric {
  display: flex;
  flex-direction: column;
  gap: 9px;
}
/* agrupador da calculadora científica: repassa o layout para os blocos
   internos (funções/numérico) como se não existisse */
#keypadCientifica { display: contents; }
#keypadNormal, #keypadHoras {
  display: flex;
  flex-direction: column;
  gap: 9px;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}
.key-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 9px;
  min-height: 0;
  min-width: 0;
}
.key-row.main-row {
  grid-template-columns: repeat(4, 1fr);
}
.key-row.row-ops5 {
  grid-template-columns: repeat(5, 1fr);
}
.key-row.row-ops7 {
  grid-template-columns: repeat(7, 1fr);
}
.key-row.row-zero {
  grid-template-columns: repeat(3, 1fr);
}
.row-enter-solo {
  grid-template-columns: 1fr;
}
.key.key-enter-span { display: none; }

/* célula = rótulo f (impresso acima, na carcaça) + tecla + rótulo g (abaixo) —
   imita as calculadoras físicas, onde as legendas de atalho ficam gravadas
   no corpo do aparelho, não dentro da própria tecla */
.key-cell {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 0;
  min-height: 0;
}
.key-label {
  display: block;
  text-align: center;
  font-size: .64rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  min-height: 1.3em;
  padding: 0 2px;
  white-space: nowrap;
  overflow: hidden;
  pointer-events: none;
}
.key-label-f { color: var(--key-fin); }
.key-label-g { color: #6fb3f2; }
.key-cell .key { flex: 1 1 0; min-height: 0; width: 100%; }

.key {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--key-bg);
  background-image: linear-gradient(180deg, rgba(255,255,255,.14) 0%, rgba(255,255,255,0) 45%, rgba(0,0,0,.2) 100%);
  color: var(--key-fg);
  border: 2px solid #050505;
  border-radius: 8px;
  padding: 6px 4px;
  font-size: .95rem;
  font-weight: 600;
  line-height: 1.1;
  cursor: pointer;
  user-select: none;
  box-shadow:
    0 2px 4px rgba(0,0,0,.4),
    inset 0 1px 0 rgba(255,255,255,.14),
    inset 0 -3px 5px rgba(0,0,0,.3);
  transition: transform .05s, filter .1s, box-shadow .1s;
}
.key:active, .key.pressed {
  transform: translateY(1px);
  box-shadow:
    0 1px 1px rgba(0,0,0,.3),
    inset 0 2px 5px rgba(0,0,0,.5);
}
.key:hover { filter: brightness(1.08); }

.key-small { font-size: .68rem; }
.key-fin { background-color: var(--key-fin); color: var(--key-fin-fg); }
.key-stat { background-color: var(--key-stat); color: var(--key-stat-fg); font-size: .78rem; }
.key.op { background-color: var(--key-op); font-size: 1.15rem; }
.key-zero { grid-column: span 1; }
.key-enter {
  background-color: var(--key-enter);
  color: #241300;
}
.key-equals { font-size: 1.8em; }

.key-toggle-f, .key-toggle-g {
  font-weight: 800;
  font-style: italic;
}
.key-toggle-f.active, .key-toggle-g.active {
  box-shadow: 0 0 0 2px #fff8, inset 0 0 8px rgba(0,0,0,.3);
}

.ann-f, .ann-g { font-weight: 800; font-style: italic; }
.ann-f.active { color: var(--key-fin); }
.ann-g.active { color: #6fb3f2; }


/* ---------- modal ---------- */
.modal-root {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.6);
  z-index: 100;
  padding: 16px;
}
.modal-root.open { display: flex; }
.modal-box {
  background: #1c1c1c;
  border: 1px solid #2e2e2e;
  border-radius: 12px;
  width: 100%;
  max-width: 420px;
  max-height: 88vh;
  overflow-y: auto;
  padding: 20px;
  box-shadow: var(--shadow);
}
.modal-title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.modal-sub { color: var(--text-dim); font-size: .78rem; margin: 0 0 16px; }
.modal-field { margin-bottom: 14px; }
.modal-field label {
  display: block;
  font-size: .75rem;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.modal-field input, .modal-field textarea {
  width: 100%;
  background: #111;
  border: 1px solid #2c2c2c;
  color: var(--key-fg);
  border-radius: 8px;
  padding: 10px 11px;
  font-size: .95rem;
}
.modal-field textarea { font-family: "Consolas", monospace; resize: vertical; min-height: 60px; }
.modal-progress {
  display: flex;
  gap: 5px;
  margin-bottom: 16px;
}
.modal-progress .dot {
  height: 5px;
  flex: 1;
  border-radius: 3px;
  background: #333;
}
.modal-progress .dot.active { background: var(--accent); }
.modal-progress .dot.done { background: #4a4a4a; }
.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.btn {
  flex: 1;
  padding: 11px;
  border-radius: 8px;
  border: none;
  font-weight: 700;
  font-size: .85rem;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #221000; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary { background: #2c2c2c; color: var(--key-fg); }
.btn-secondary:hover { background: #333; }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.result-box {
  background: #111;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 12px;
}
.result-row {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
  font-size: .9rem;
  border-bottom: 1px solid #222;
}
.result-row:last-child { border-bottom: none; }
.result-row .rlabel { color: var(--text-dim); }
.result-row .rvalue { font-family: "Consolas", monospace; font-weight: 700; color: var(--accent); }

.field-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.field-chip {
  background: #262626;
  border: 1px solid #333;
  color: var(--text-dim);
  font-size: .68rem;
  padding: 4px 8px;
  border-radius: 12px;
  cursor: pointer;
}
.field-chip:hover { background: #303030; color: var(--key-fg); }
.formula-hint {
  font-size: .7rem;
  color: var(--text-dim);
  margin: -2px 0 8px;
  line-height: 1.4;
}
.formula-hint b { color: var(--key-fg); }
.symbol-row-label {
  display: block;
  font-size: .68rem;
  color: var(--text-dim);
  margin: 2px 0 6px;
}
.symbol-chip {
  background: #201a0d;
  border-color: #4a3a1a;
  color: var(--accent);
  font-family: "Consolas", monospace;
  font-weight: 700;
  min-width: 34px;
  text-align: center;
}
.symbol-chip:hover { background: #2a220f; color: var(--accent); }

.formula-preview {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 5px;
  min-height: 44px;
  background: #111;
  border: 1px solid #2c2c2c;
  border-radius: 8px;
  padding: 8px 10px;
  margin-bottom: 8px;
}
.formula-preview-empty {
  font-size: .72rem;
  color: #555;
  align-self: center;
}
.formula-token {
  background: #262626;
  border: 1px solid #3a3a3a;
  color: var(--key-fg);
  font-family: "Consolas", monospace;
  font-weight: 700;
  font-size: .82rem;
  padding: 3px 9px;
  border-radius: 6px;
  height: fit-content;
}
.formula-preview { align-items: center; }
.formula-token-plain {
  font-family: "Consolas", monospace;
  font-weight: 700;
  font-size: .8rem;
  color: var(--key-fg);
  white-space: nowrap;
}
/* fração de verdade: numerador em cima, traço, denominador embaixo — igual
   se escreve no papel, em vez de "(a)/(b)" em linha só */
.formula-frac {
  padding: 4px 8px;
  display: inline-flex;
  align-items: center;
}
.frac-stack {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
}
.frac-row {
  display: flex;
  gap: 3px;
  padding: 0 3px 2px;
}
.frac-line {
  width: 100%;
  min-width: 16px;
  height: 2px;
  background: var(--key-fg);
  margin: 1px 0;
}
/* potência: expoente pequeno e levantado, do jeito que se escreve à mão */
.formula-pow {
  padding: 3px 6px;
  display: inline-flex;
  align-items: flex-start;
}
.pow-base { display: flex; gap: 3px; }
.pow-exp {
  display: flex;
  gap: 2px;
  font-size: .74em;
  transform: translateY(-6px);
  margin-left: 1px;
}
.formula-actions-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}
.btn-formula-action {
  flex: 1;
  padding: 7px;
  font-size: .72rem;
  border-radius: 8px;
}
.number-insert-row {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}
.number-insert-row input {
  flex: 1;
  background: #111;
  border: 1px solid #2c2c2c;
  color: var(--key-fg);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: .9rem;
}
.number-insert-row input.input-error { border-color: #e05252; }
.btn-insert-number {
  padding: 8px 14px;
  font-size: .78rem;
  border-radius: 8px;
  white-space: nowrap;
}
.custom-input-row {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
  align-items: center;
}
.custom-input-row input { flex: 1; }
.custom-input-row .remove-field {
  background: none;
  border: none;
  color: #888;
  cursor: pointer;
  font-size: .9rem;
  padding: 4px 6px;
}
.add-field-btn {
  background: none;
  border: 1px dashed #3a3a3a;
  color: var(--text-dim);
  border-radius: 8px;
  padding: 8px;
  width: 100%;
  cursor: pointer;
  font-size: .78rem;
  margin-bottom: 14px;
}
.add-field-btn:hover { border-color: var(--accent); color: var(--accent); }
.form-error {
  color: #e05252;
  font-size: .75rem;
  margin: -6px 0 10px;
  min-height: 14px;
}

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  html, body { overflow: hidden; }
  .app-shell {
    height: 100vh;
    height: 100svh;
    height: 100dvh;
    overflow: hidden;
  }
  .workspace {
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
    padding: 10px;
    display: flex;
  }
  .calculator { display: flex; min-height: 0; }
  .calc-body { flex: 1 1 auto; min-height: 0; display: flex; flex-direction: column; }
  .calc-brand { flex: 0 0 auto; }
  .display-row { flex: 0 0 auto; grid-template-columns: 1fr; margin-bottom: 10px; }
  .keypad {
    flex: 1 1 auto;
    min-height: 0;
  }
  /* grade com linhas explícitas (minmax(0,1fr)) em vez de flex-de-flex:
     um "1fr" puro tem um mínimo automático baseado no conteúdo (não
     encolhe abaixo do rótulo+tecla), então numa tela real (barra de
     endereço do navegador reduzindo a altura útil) as linhas não cabiam
     no espaço e a tecla sobrava fina. minmax(0,1fr) permite encolher
     de verdade até preencher exatamente o espaço disponível. */
  .keypad-functions {
    flex: 4 1 0;
    min-height: 0;
    display: grid;
    grid-template-rows: repeat(4, minmax(0, 1fr));
    gap: 6px;
  }
  .keypad-numeric {
    flex: 5 1 0;
    min-height: 0;
    display: grid;
    grid-template-rows: repeat(5, minmax(0, 1fr));
    gap: 6px;
  }
  #keypadNormal, #keypadHoras {
    flex: 1 1 auto;
    min-height: 0;
    display: grid;
    grid-template-rows: repeat(6, minmax(0, 1fr));
    gap: 8px;
  }
  .key-row { gap: 12px; }
  .key { font-size: clamp(.68rem, 2vh, 1.15rem); padding: 3px 4px; }
  .key-small { font-size: clamp(.5rem, 1.7vh, .74rem); }
  .key-label { font-size: clamp(.46rem, 1.3vh, .56rem); min-height: clamp(.68rem, 1.9vh, .88rem); line-height: 1.15; }
  .calc-signature { flex: 0 0 auto; }
  .shortcuts-panel {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(340px, 86vw);
    height: 100%;
    border-radius: 0;
    transform: translateX(100%);
    transition: transform .22s ease;
    z-index: 60;
  }
  .shortcuts-panel.open { transform: translateX(0); }
  .shortcuts-list { max-height: none; }
  .only-mobile { display: inline-block; }
}

@media (max-width: 520px) {
  :root { font-size: 15px; }
  .workspace { padding: 6px; }
  .calc-body { padding: 8px 8px 6px; border-radius: 14px; }
  .calc-brand { padding: 0 2px 2px; }
  .calc-brand-name { font-size: .62rem; }
  .calc-signature { font-size: .54rem; padding: 2px 0 0; }
  .display-row { margin-bottom: 5px; }
  .display-unit { padding: 7px 10px; gap: 3px; }
  .display-annunciators { font-size: .56rem; gap: 10px; }
  .display-screen { min-height: 36px; padding: 5px 12px; }
  .status-msg { font-size: .6rem; min-height: 11px; }
  .main-display { font-size: clamp(1.3rem, 6vw, 1.8rem); }
  .display-regs { font-size: .56rem; gap: 4px 8px; }
  .key-row { gap: 14px; }
  .keypad { gap: 8px; }
  .keypad-functions, .keypad-numeric { gap: 6px; }
}

@media (min-width: 861px) and (max-width: 1100px) {
  .display-row { grid-template-columns: 1fr 280px; }
}

/* ---------- telas baixas (celular em paisagem) ---------- */
@media (max-height: 480px) {
  .workspace { padding: 6px; }
  .calc-body { position: relative; padding: 6px 10px 6px; border-radius: 12px; }

  /* cabeçalho vira uma sobreposição discreta dentro da moldura escura
     do visor, junto da linha de anunciadores — economiza uma fileira
     inteira de altura para o teclado */
  .calc-brand {
    position: absolute;
    top: 9px;
    right: 16px;
    left: 16px;
    padding: 0;
    z-index: 5;
    pointer-events: none;
  }
  .calc-brand-actions { pointer-events: auto; }
  .calc-brand-name { font-size: .58rem; }
  .btn-icon { padding: 2px 6px; font-size: .56rem; }
  .btn-mode { padding: 2px 6px; font-size: .58rem; }
  .calc-signature { font-size: .5rem; padding: 2px 0 0; }

  .display-row { margin-bottom: 6px; margin-top: 15px; }
  .display-unit { padding: 6px 10px; gap: 3px; }
  .display-annunciators { font-size: .5rem; gap: 8px; }
  .display-screen { min-height: 40px; padding: 4px 10px; }
  .status-msg { font-size: .56rem; min-height: 10px; }
  .main-display { font-size: clamp(1.1rem, 4.5vh, 1.6rem); }
  .display-regs { font-size: .5rem; gap: 3px 8px; }

  .keypad {
    display: flex;
    flex-direction: row;
    gap: 16px;
  }

  /* bloco de funções vira uma grade única de 6 colunas x 4 linhas,
     as divs .key-row somem (display:contents) e o ENTER ocupa
     a coluna 6 nas linhas 3-4, igual a uma calculadora física */
  .keypad-functions {
    flex: 1.4;
    min-height: 0;
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    grid-template-rows: repeat(4, minmax(0, 1fr));
    column-gap: 10px;
    row-gap: 6px;
  }
  .keypad-functions .key-row { display: contents; }
  .key.key-enter-span {
    display: flex;
    grid-column: 6;
    grid-row: 3 / span 2;
  }

  .keypad-numeric {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-rows: repeat(4, minmax(0, 1fr));
    gap: 6px;
  }
  #keypadCientifica .row-enter-solo { display: none; }

  #keypadNormal, #keypadHoras {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-rows: repeat(6, minmax(0, 1fr));
    gap: 6px;
    max-width: 360px;
  }

  .key-row { gap: 10px; }
  .key { font-size: clamp(.66rem, 3.2vh, .98rem); padding: 2px 4px; }
  .key-small { font-size: clamp(.5rem, 2vh, .68rem); }
  .key-label { font-size: clamp(.48rem, 1.7vh, .58rem); min-height: clamp(.63rem, 1.8vh, .78rem); line-height: 1.15; }
}

.shortcuts-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 50;
  display: none;
}
.shortcuts-overlay.open { display: block; }

/* ---------- guia de teclas ---------- */
.btn-guide {
  margin: 0 0 8px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: transparent;
  color: var(--key-fg);
  font-size: .78rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.btn-guide:hover { filter: brightness(1.2); }
.guide-intro { font-size: .8rem; line-height: 1.45; margin: 0 0 10px; }
.guide-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 5px 14px;
  font-size: .82rem;
  margin: 0 0 12px;
}
.guide-grid .guide-how { color: var(--accent); font-weight: 700; white-space: nowrap; text-align: right; }
.guide-notes { font-size: .78rem; line-height: 1.5; margin: 0 0 12px; padding-left: 18px; }
.guide-notes li { margin-bottom: 4px; }

/* ---------- atalhos por sequência de teclas ---------- */
.choice-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  text-align: left;
  background: #222;
  border: 1px solid #333;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 10px;
  color: var(--key-fg);
  cursor: pointer;
}
.choice-card:hover { background: #292929; border-color: var(--accent); }
.choice-card b { font-size: .9rem; }
.choice-card span { font-size: .74rem; color: var(--text-dim); line-height: 1.4; }

.keyseq-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  min-height: 44px;
  padding: 8px;
  background: #111;
  border: 1px solid #2c2c2c;
  border-radius: 8px;
  margin-bottom: 8px;
  align-content: flex-start;
}
.key-chip {
  background: #262626;
  border: 1px solid #3a3a3a;
  color: var(--key-fg);
  font-family: "Consolas", monospace;
  font-weight: 700;
  font-size: .78rem;
  padding: 3px 8px;
  border-radius: 6px;
}
.key-chip-field { color: var(--accent); border-color: var(--accent); font-family: inherit; }
.key-chip-f { color: var(--key-fin); }
.key-chip-g { color: #6fb3f2; }
.hint-f { color: var(--key-fin); }
.hint-g { color: #6fb3f2; }

.mini-keypad { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; }
.mk-row { display: grid; gap: 4px; }
.mk-cell { display: flex; flex-direction: column; min-width: 0; }
.mk-cell button {
  border: none;
  background: none;
  font-family: inherit;
  cursor: pointer;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
}
.mk-f, .mk-g {
  font-size: .6rem;
  font-weight: 800;
  min-height: 20px;
  padding: 0 1px;
  color: var(--key-fin);
}
.mk-g { color: #6fb3f2; }
.mk-key {
  background: #2e2e2e !important;
  border: 1px solid #444 !important;
  border-radius: 7px;
  color: var(--key-fg);
  font-size: .85rem;
  font-weight: 700;
  min-height: 34px;
}
.mk-enter { background: var(--key-enter) !important; color: #241300; }
.mk-key:active, .mk-f:active, .mk-g:active { filter: brightness(1.4); }
.mk-cell button:disabled { opacity: .3; cursor: default; }

.modal-select {
  width: 100%;
  background: #111;
  border: 1px solid #2c2c2c;
  color: var(--key-fg);
  border-radius: 8px;
  padding: 10px 11px;
  font-size: .85rem;
}
.key-test { margin-bottom: 14px; font-size: .8rem; }
.key-test summary { cursor: pointer; color: var(--text-dim); padding: 4px 0 8px; }
.key-test-result { margin-top: 8px; font-size: .82rem; }
.key-test-result.is-error { color: #e05252; }