* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Cool foundation - Sophistication & Trust */
  --bg-primary: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;

  /* Text hierarchy - 4 levels - increased contrast */
  --text-primary: #020617;
  --text-secondary: #334155;
  --text-muted: #475569;
  --text-faint: #64748b;

  /* Borders - borders-only approach - increased visibility */
  --border: rgba(0, 0, 0, 0.12);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.18);

  /* Semantic colors - only for meaning */
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;

  /* Spacing - 4px grid */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  /* Border radius - sharp system */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Typography */
  --font-mono: "SF Mono", "Monaco", "Inconsolata", "Fira Code", "Droid Sans Mono", "Source Code Pro",
    monospace;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", "Helvetica Neue",
    Arial, sans-serif;
  background: var(--bg-tertiary);
  min-height: 100vh;
  padding: var(--space-4);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; /* Prevenir scroll horizontal */
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  width: 100%;
  box-sizing: border-box;
}

header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-strong);
  padding: var(--space-6) var(--space-4);
  text-align: center;
}

header h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
}

main {
  padding: var(--space-6);
}

.main-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: stretch;
  width: 100%;
  box-sizing: border-box;
}

.quote-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100%;
  width: 100%;
  box-sizing: border-box;
}

.quote-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 500;
  width: 100%;
  box-sizing: border-box;
  gap: var(--space-2);
}

.currency-label {
  font-weight: 600;
}

.update-time {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.quote-value {
  font-size: 48px;
  font-weight: 600;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  margin: var(--space-4) 0;
  letter-spacing: -0.02em;
}

.quote-change {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  margin-top: var(--space-4);
}

.change-label {
  color: var(--text-secondary);
  font-weight: 400;
}

.change-value {
  font-weight: 500;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}

.change-value.positive {
  color: var(--success);
}

.change-value.negative {
  color: var(--error);
}

.chart-container {
  background: var(--bg-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden; /* Prevenir overflow do gráfico */
  width: 100%;
  box-sizing: border-box;
}

.chart-wrapper {
  position: relative;
  flex: 1;
  min-height: 200px;
  width: 100%;
}

#quoteChart {
  width: 100%;
  max-width: 100%;
  display: block;
  box-sizing: border-box;
  cursor: crosshair;
}

.chart-tooltip {
  position: absolute;
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: 11px;
  font-family: var(--font-mono);
  pointer-events: none;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  white-space: nowrap;
  transform: translate(-50%, -100%);
  margin-top: -8px;
  line-height: 1.4;
  text-align: center;
}

.chart-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--text-primary);
}

@media (max-width: 640px) {
  .chart-tooltip {
    font-size: 10px;
    padding: var(--space-1) var(--space-2);
    max-width: 140px;
    white-space: normal;
  }
}

.chart-title {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
  text-align: center;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.converted-value {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.converted-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.converted-amount {
  font-size: 24px;
  font-weight: 600;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.alerts-section {
  background: var(--bg-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  width: 100%;
  box-sizing: border-box;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.alerts-section h2 {
  font-size: 16px;
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.btn-test {
  padding: var(--space-2) var(--space-3);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 150ms cubic-bezier(0.25, 1, 0.5, 1);
  white-space: nowrap;
  font-family: inherit;
}

.btn-test:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-secondary);
}

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

.alert-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-group label {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Custom select wrapper */
.select-wrapper {
  position: relative;
  display: inline-flex;
  width: 100%;
}

.select-wrapper::after {
  content: "▼";
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 10px;
  color: var(--text-muted);
  line-height: 1;
}

.form-group select {
  appearance: none;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-right: calc(var(--space-4) + 20px);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 150ms cubic-bezier(0.25, 1, 0.5, 1);
}

.form-group select:hover {
  border-color: var(--text-secondary);
}

.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-group input {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all 150ms cubic-bezier(0.25, 1, 0.5, 1);
}

.form-group input:hover {
  border-color: var(--text-secondary);
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-group input::placeholder {
  color: var(--text-faint);
}

.btn-primary {
  grid-column: 1 / -1;
  padding: var(--space-3) var(--space-4);
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 150ms cubic-bezier(0.25, 1, 0.5, 1);
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

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

.btn-primary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.alerts-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
  overflow-y: auto;
}

.no-alerts {
  text-align: center;
  color: var(--text-faint);
  padding: var(--space-6);
  font-size: 13px;
}

.alert-item {
  background: var(--bg-secondary);
  padding: var(--space-4);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 150ms cubic-bezier(0.25, 1, 0.5, 1);
  animation: slideIn 200ms cubic-bezier(0.25, 1, 0.5, 1);
}

.alert-item:hover {
  border-color: var(--text-secondary);
  background: var(--bg-tertiary);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-8px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.alert-info {
  flex: 1;
}

.alert-type {
  font-weight: 500;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.alert-type.above {
  color: var(--success);
}

.alert-type.below {
  color: var(--error);
}

.alert-value {
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

.delete-btn {
  background: var(--bg-primary);
  color: var(--error);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  transition: all 150ms cubic-bezier(0.25, 1, 0.5, 1);
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.delete-btn:hover {
  background: var(--error);
  color: white;
  border-color: var(--error);
}

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

.conversion-section {
  background: var(--bg-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  width: 100%;
  box-sizing: border-box;
}

.conversion-section .section-header {
  margin-bottom: var(--space-4);
}

.conversion-section h2 {
  font-size: 16px;
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.conversion-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.conversion-form .form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-strong);
  padding: var(--space-4);
  text-align: center;
  color: var(--text-secondary);
  font-size: 12px;
}

@media (max-width: 968px) {
  .main-layout {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 640px) {
  body {
    padding: 0;
    font-size: 15px;
    /* Prevenir zoom ao focar em inputs no iOS */
    -webkit-text-size-adjust: 100%;
  }

  .container {
    border-radius: 0;
    border-left: none;
    border-right: none;
    /* Ajustar para safe area no iPhone */
    min-height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom));
    max-width: 100%;
    width: 100%;
    margin: 0;
  }

  main {
    padding: var(--space-4);
    width: 100%;
    box-sizing: border-box;
  }

  header {
    padding: var(--space-4) var(--space-3);
    padding-top: calc(var(--space-4) + env(safe-area-inset-top));
  }

  header h1 {
    font-size: 24px;
    margin-bottom: var(--space-1);
  }

  .subtitle {
    font-size: 12px;
  }

  .quote-card {
    padding: var(--space-4);
  }

  .quote-header {
    font-size: 10px;
    margin-bottom: var(--space-3);
    flex-wrap: wrap;
  }

  .update-time {
    font-size: 9px;
  }

  .quote-value {
    font-size: 32px;
    margin: var(--space-3) 0;
  }

  .quote-change {
    font-size: 12px;
    margin-top: var(--space-3);
  }

  .change-value {
    padding: var(--space-1) var(--space-2);
    font-size: 12px;
  }

  .converted-value {
    margin-top: var(--space-3);
    padding-top: var(--space-3);
  }

  .converted-label {
    font-size: 10px;
  }

  .converted-amount {
    font-size: 18px;
  }

  .alerts-section,
  .conversion-section,
  .chart-container {
    padding: var(--space-3);
  }

  .section-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
  }

  .alerts-section h2,
  .conversion-section h2 {
    font-size: 15px;
  }

  .alert-form {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
  }

  .form-group label {
    font-size: 10px;
  }

  .form-group input,
  .form-group select {
    padding: var(--space-3) var(--space-3);
    font-size: 16px; /* Prevenir zoom no iOS */
    min-height: 44px; /* Tamanho mínimo para touch */
  }

  .btn-primary {
    padding: var(--space-3) var(--space-4);
    font-size: 15px;
    min-height: 44px; /* Tamanho mínimo para touch */
    width: 100%;
  }

  .btn-test {
    width: 100%;
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
  }

  .alert-item {
    padding: var(--space-3);
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .alert-info {
    flex: 1 1 100%;
  }

  .alert-type {
    font-size: 10px;
  }

  .alert-value {
    font-size: 15px;
  }

  .delete-btn {
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
    font-size: 12px;
    flex: 0 0 auto;
  }

  .chart-container {
    min-height: 200px;
    padding: var(--space-3);
    overflow: visible; /* Permitir que o gráfico seja visível */
  }

  .chart-title {
    font-size: 12px;
    margin-bottom: var(--space-3);
  }

  #quoteChart {
    min-height: 180px;
    width: 100% !important;
    max-width: 100%;
    height: auto;
  }

  footer {
    padding: var(--space-3);
    padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom));
    font-size: 11px;
  }

  /* Melhorar área de toque para elementos interativos */
  button,
  .delete-btn,
  .btn-test,
  .btn-primary {
    -webkit-tap-highlight-color: rgba(59, 130, 246, 0.2);
    touch-action: manipulation;
  }

  /* Ajustar inputs para melhor experiência em mobile */
  input[type="number"] {
    -webkit-appearance: none;
    -moz-appearance: textfield;
  }

  input[type="number"]::-webkit-inner-spin-button,
  input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
  }
}

/* Ajustes para telas muito pequenas */
@media (max-width: 375px) {
  body {
    padding: 0;
  }

  main {
    padding: var(--space-3);
  }

  header {
    padding: var(--space-3) var(--space-2);
    padding-top: calc(var(--space-3) + env(safe-area-inset-top));
  }

  header h1 {
    font-size: 22px;
  }

  .quote-value {
    font-size: 28px;
  }

  .alerts-section,
  .conversion-section,
  .chart-container,
  .quote-card {
    padding: var(--space-3);
  }

  .chart-container {
    padding: var(--space-2);
  }

  #quoteChart {
    min-height: 160px;
  }
}

/* Ajustes para modo landscape em mobile */
@media (max-width: 896px) and (orientation: landscape) {
  .quote-value {
    font-size: 28px;
  }

  #quoteChart {
    min-height: 150px;
  }
}

/* Passcode screen */
.passcode-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: 9999;
}

.passcode-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  max-width: 360px;
  width: 100%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.passcode-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.passcode-header h1 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.passcode-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
}

.passcode-form .form-group {
  margin-bottom: var(--space-4);
}

.passcode-form input[type="password"] {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 16px;
  box-sizing: border-box;
}

.passcode-form input[type="password"]:focus {
  outline: none;
  border-color: var(--accent);
}

.passcode-error {
  color: var(--error);
  font-size: 13px;
  margin-top: var(--space-2);
}

.passcode-form .btn-primary {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  margin-top: var(--space-2);
}