@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@300;400;500;600&display=swap');

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

/* ── Temas ───────────────────────────────────────────── */
:root {
  --bg: #0f1117;
  --surface: #161b27;
  --surface2: #1d2535;
  --border: #2a3348;
  --border2: #3a4a6a;
  --accent: #00d4aa;
  --accent2: #0096ff;
  --accent3: #ff6b35;
  --text: #e8edf5;
  --text2: #8a9ab8;
  --text3: #4a5a78;
  --green: #00d4aa;
  --red: #ff4d6d;
  --yellow: #e6a800;
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'IBM Plex Sans', sans-serif;
}

:root.light {
  --bg: #f0f2f7;
  --surface: #ffffff;
  --surface2: #e8ecf4;
  --border: #cdd4e5;
  --border2: #a0aec8;
  --accent: #009978;
  --accent2: #0070cc;
  --text: #1a2236;
  --text2: #4a5878;
  --text3: #8a98b8;
  --red: #d93055;
  --yellow: #b87800;
}

/* ── Layout base ─────────────────────────────────────── */
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.app {
  width: 100%;
  max-width: 760px;
}

/* ── Cabeçalho ───────────────────────────────────────── */
.header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 2rem;
}

.header h1 {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.header .version {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}

.theme-btn {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 12px 5px 8px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text2);
}

.theme-btn:hover {
  border-color: var(--border2);
  color: var(--text);
}

.theme-btn .theme-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  line-height: 1;
}

/* ── Grid principal ──────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.panel {
  background: var(--surface);
  padding: 1.5rem;
}

.panel.full {
  grid-column: 1 / -1;
}

.panel.results {
  background: var(--surface2);
}

.panel-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Botões de modo de cálculo ───────────────────────── */
.calc-type {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.calc-btn {
  font-family: var(--mono);
  font-size: 12px;
  padding: 10px 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}

.calc-btn:hover {
  border-color: var(--border2);
  color: var(--text);
}

.calc-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  font-weight: 600;
}

/* ── Campos de dados ─────────────────────────────────── */
.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text2);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.field label .target-indicator {
  color: var(--accent);
  margin-left: 4px;
}

.field input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}

.field input:focus {
  border-color: var(--accent2);
}

.field input.target {
  background: color-mix(in srgb, var(--accent) 8%, var(--surface2));
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  color: var(--accent);
}

.field input:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.field .suffix {
  display: flex;
  align-items: center;
}

.field .suffix input {
  border-radius: 6px 0 0 6px;
  flex: 1;
}

.field .suffix span {
  background: var(--border);
  border: 1px solid var(--border);
  border-left: none;
  padding: 10px 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  border-radius: 0 6px 6px 0;
  white-space: nowrap;
}

/* ── Toggle de entrada ───────────────────────────────── */
.entrada-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 1rem;
  cursor: pointer;
}

.entrada-row label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text2);
  cursor: pointer;
  flex: 1;
  margin: 0;
}

.toggle {
  width: 36px;
  height: 20px;
  background: var(--border2);
  border-radius: 10px;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle.on {
  background: var(--accent);
}

.toggle::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  top: 3px;
  left: 3px;
  transition: transform 0.2s;
}

.toggle.on::after {
  transform: translateX(16px);
}

.entrada-field {
  margin-top: -8px;
  margin-bottom: 1rem;
}

.entrada-field.hidden {
  display: none;
}

/* ── Botões de ação ──────────────────────────────────── */
.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 1.5rem;
}

.btn {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  padding: 12px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
}

.btn.primary {
  background: var(--accent);
  color: #000;
}

.btn.primary:hover {
  filter: brightness(1.1);
}

.btn.primary:active {
  transform: scale(0.98);
}

.btn.secondary {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text2);
}

.btn.secondary:hover {
  border-color: var(--text2);
  color: var(--text);
}

.btn.danger {
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--red) 40%, transparent);
  color: var(--red);
}

.btn.danger:hover {
  background: color-mix(in srgb, var(--red) 10%, transparent);
}

.btn.full {
  grid-column: 1 / -1;
}

/* ── Painel de resultado ─────────────────────────────── */
.result-card {
  padding: 1.5rem;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  margin-bottom: 1rem;
}

.result-card .result-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.result-card .result-value {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 600;
  color: var(--accent);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 1rem;
}

.result-mini {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
}

.result-mini .mini-label {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--text3);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.result-mini .mini-value {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}

/* ── Mensagem de erro ────────────────────────────────── */
.error-msg {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--red);
  padding: 10px 12px;
  background: color-mix(in srgb, var(--red) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--red) 30%, transparent);
  border-radius: 6px;
  margin-top: 1rem;
  display: none;
}

.error-msg.visible {
  display: block;
}

/* ── Tabela de simulação ─────────────────────────────── */
.table-section {
  margin-top: 1rem;
}

.table-toggle {
  width: 100%;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.15s;
}

.table-toggle:hover {
  border-color: var(--border2);
  color: var(--text);
}

.table-toggle .arrow {
  transition: transform 0.2s;
}

.table-toggle.open .arrow {
  transform: rotate(180deg);
}

.amort-table-wrap {
  display: none;
  margin-top: 8px;
  overflow: auto;
  max-height: 360px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.amort-table-wrap.visible {
  display: block;
}

.amort-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
  table-layout: fixed;
}

.amort-table th {
  background: var(--surface2);
  color: var(--text3);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 8px 16px;
  text-align: right;
  position: sticky;
  top: 0;
  z-index: 1;
  border-bottom: 1px solid var(--border);
  width: 33.33%;
}

.amort-table th:first-child {
  text-align: center;
  width: 20%;
}

.amort-table th:nth-child(2) {
  width: 40%;
}

.amort-table th:last-child {
  width: 40%;
}

.amort-table td {
  padding: 7px 16px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  color: var(--text2);
}

.amort-table td:first-child {
  text-align: center;
  color: var(--text3);
  font-size: 12px;
}

.amort-table tr:last-child td {
  border-bottom: none;
}

.amort-table tr:hover td {
  background: var(--surface2);
}

/* ── Modal de ajuda ──────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-overlay.visible {
  display: flex;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 14px;
  width: 100%;
  max-width: 520px;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
}

.modal-close {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text2);
  font-family: var(--mono);
  font-size: 13px;
  padding: 4px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.15s;
}

.modal-close:hover {
  color: var(--text);
  border-color: var(--text2);
}

.modal-body {
  padding: 1.5rem;
  max-height: 72vh;
  overflow-y: auto;
}

.help-item {
  display: flex;
  gap: 12px;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.help-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.help-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--accent) 12%, var(--surface2));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.help-text strong {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}

.help-text p {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--text2);
  line-height: 1.6;
}

.help-section-title {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  color: var(--text3);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
  margin-top: 1.25rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.help-section-title:first-child {
  margin-top: 0;
}

.help-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}

.modal-footer p {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  line-height: 1.7;
}

.modal-footer strong {
  color: var(--text2);
  font-weight: 500;
}

/* ── Rodapé (relógio) ────────────────────────────────── */
.footer-clock {
  text-align: right;
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
}

/* ── Responsivo ──────────────────────────────────────── */
@media (max-width: 560px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 1.25rem;
  }

  .result-grid {
    grid-template-columns: 1fr;
  }

  .actions {
    grid-template-columns: 1fr;
  }

  .btn.full {
    grid-column: 1;
  }
}