/* Material Design 3, token-driven. Light + dark. Seed: green (casa + dinheiro).
   No hardcoded component colors, only roles. Motion uses M3 emphasized easing. */

:root {
  color-scheme: light dark;

  /* Type */
  --font-text: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Space Grotesk", var(--font-text);

  /* Shape scale */
  --shape-xs: 4px;
  --shape-s: 8px;
  --shape-m: 12px;
  --shape-l: 16px;
  --shape-xl: 28px;
  --shape-full: 999px;

  /* Spacing, 8pt grid */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-12: 48px;

  /* Motion */
  --ease-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --dur-s: 110ms;
  --dur-m: 240ms;
}

/* Color roles, light */
:root,
:root[data-theme="light"] {
  --primary: #19684a;
  --on-primary: #ffffff;
  --primary-container: #a4f4cb;
  --on-primary-container: #00210f;
  --secondary-container: #cfe9d9;
  --on-secondary-container: #0a1f15;
  --tertiary: #3d6373;
  --tertiary-container: #c1e8fb;
  --on-tertiary-container: #001f29;

  --surface: #f6fbf5;
  --surface-lowest: #ffffff;
  --surface-low: #f0f5ef;
  --surface-container: #eaf0e9;
  --surface-high: #e4eae3;
  --surface-highest: #dfe4de;
  --on-surface: #181d19;
  --on-surface-variant: #404943;
  --outline: #707972;
  --outline-variant: #c0c9c0;

  --error: #ba1a1a;
  --error-container: #ffdad6;
  --on-error-container: #410002;

  --shadow: 0 1px 2px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.06);
}

/* Color roles, dark. Dark is not pure black, surfaces elevate via tint. */
:root[data-theme="dark"] {
  --primary: #89d8ab;
  --on-primary: #00391f;
  --primary-container: #00522f;
  --on-primary-container: #a4f4cb;
  --secondary-container: #354b40;
  --on-secondary-container: #cfe9d9;
  --tertiary: #a5cde0;
  --tertiary-container: #244c5b;
  --on-tertiary-container: #c1e8fb;

  --surface: #101511;
  --surface-lowest: #0b100c;
  --surface-low: #181d19;
  --surface-container: #1c211d;
  --surface-high: #272b27;
  --surface-highest: #313631;
  --on-surface: #dfe4de;
  --on-surface-variant: #c0c9c0;
  --outline: #8a938b;
  --outline-variant: #404943;

  --error: #ffb4ab;
  --error-container: #93000a;
  --on-error-container: #ffdad6;

  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.32);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #89d8ab;
    --on-primary: #00391f;
    --primary-container: #00522f;
    --on-primary-container: #a4f4cb;
    --secondary-container: #354b40;
    --on-secondary-container: #cfe9d9;
    --tertiary: #a5cde0;
    --tertiary-container: #244c5b;
    --on-tertiary-container: #c1e8fb;

    --surface: #101511;
    --surface-lowest: #0b100c;
    --surface-low: #181d19;
    --surface-container: #1c211d;
    --surface-high: #272b27;
    --surface-highest: #313631;
    --on-surface: #dfe4de;
    --on-surface-variant: #c0c9c0;
    --outline: #8a938b;
    --outline-variant: #404943;

    --error: #ffb4ab;
    --error-container: #93000a;
    --on-error-container: #ffdad6;

    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 20px rgba(0, 0, 0, 0.32);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-text);
  background: var(--surface);
  color: var(--on-surface);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur-m) var(--ease-emphasized),
    color var(--dur-m) var(--ease-emphasized);
}

/* Typography scale */
.display {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}
.headline {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}
.title {
  font-weight: 600;
  font-size: 1.05rem;
}
.label {
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--on-surface-variant);
}
.body-s {
  font-size: 0.86rem;
  color: var(--on-surface-variant);
}

.app {
  max-width: 680px;
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-4) var(--sp-12);
}

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-8);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.brand__mark {
  width: 40px;
  height: 40px;
  border-radius: var(--shape-m);
  flex: 0 0 auto;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

/* Icon button with state layer */
.icon-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--shape-full);
  background: transparent;
  color: var(--on-surface-variant);
  cursor: pointer;
  overflow: hidden;
}
.icon-btn svg {
  width: 22px;
  height: 22px;
}
.icon-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--dur-s) var(--ease-emphasized);
}
.icon-btn:hover::after {
  opacity: 0.08;
}
.icon-btn:active::after {
  opacity: 0.12;
}

.lang-select {
  height: 40px;
  padding: 0 var(--sp-3);
  border-radius: var(--shape-full);
  border: 1px solid var(--outline-variant);
  background: var(--surface-low);
  color: var(--on-surface);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

/* Hero */
.hero {
  margin-bottom: var(--sp-8);
}
.hero__title {
  margin: 0 0 var(--sp-3);
  color: var(--on-surface);
}
.hero__title .accent {
  color: var(--primary);
}
.hero__sub {
  margin: 0;
  max-width: 48ch;
  color: var(--on-surface-variant);
  font-size: 1.02rem;
}
.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 6px var(--sp-3);
  border-radius: var(--shape-full);
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  font-size: 0.78rem;
  font-weight: 600;
}
.badge svg {
  width: 15px;
  height: 15px;
}

/* Cards */
.card {
  background: var(--surface-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-l);
  padding: var(--sp-6);
  margin-bottom: var(--sp-6);
}

.form {
  display: grid;
  gap: var(--sp-6);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  border: none;
  padding: 0;
  margin: 0;
  min-inline-size: auto;
}
.field__label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.input {
  font: inherit;
  font-size: 1.05rem;
  padding: 13px var(--sp-4);
  border: 1px solid var(--outline);
  border-radius: var(--shape-s);
  background: var(--surface-lowest);
  color: var(--on-surface);
  width: 100%;
  transition: border-color var(--dur-s) var(--ease-emphasized),
    box-shadow var(--dur-s) var(--ease-emphasized);
}
.input:focus-visible {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 28%, transparent);
}
.field__hint {
  color: var(--on-surface-variant);
  font-size: 0.8rem;
}

/* Segmented control for SAC / Price */
.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-1);
  padding: var(--sp-1);
  background: var(--surface-container);
  border-radius: var(--shape-full);
}
.segmented__opt {
  position: relative;
}
.segmented__opt input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}
.segmented__opt > span {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  border-radius: var(--shape-full);
  font-weight: 600;
  color: var(--on-surface-variant);
  transition: background var(--dur-s) var(--ease-emphasized),
    color var(--dur-s) var(--ease-emphasized);
}
.segmented__opt input:checked + span {
  background: var(--primary);
  color: var(--on-primary);
}
/* Help icon inside a segment inherits the pill text color for contrast in both states. */
.segmented__opt > span .help {
  color: inherit;
  border-color: color-mix(in srgb, currentColor 45%, transparent);
}
.segmented__opt input:focus-visible + span {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 30%, transparent);
}

/* Fees */
.fees {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}
.fee {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3);
  border-radius: var(--shape-m);
  transition: background var(--dur-s) var(--ease-emphasized);
}
.fee:hover {
  background: var(--surface-low);
}
.fee__check {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
}
.fee__check input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}
.fee__check .box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 2px solid var(--outline);
  border-radius: var(--shape-xs);
  color: var(--on-primary);
  transition: background var(--dur-s) var(--ease-emphasized),
    border-color var(--dur-s) var(--ease-emphasized);
}
.fee__check .box svg {
  width: 16px;
  height: 16px;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity var(--dur-s) var(--ease-emphasized),
    transform var(--dur-s) var(--ease-emphasized);
}
.fee__check input:checked + .box {
  background: var(--primary);
  border-color: var(--primary);
}
.fee__check input:checked + .box svg {
  opacity: 1;
  transform: scale(1);
}
.fee__check input:focus-visible + .box {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 30%, transparent);
}
.fee__text {
  flex: 1;
  font-weight: 500;
}
.fee__value {
  color: var(--on-surface-variant);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

/* Help button */
.help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-full);
  background: transparent;
  color: var(--on-surface-variant);
  cursor: pointer;
  transition: background var(--dur-s) var(--ease-emphasized),
    color var(--dur-s) var(--ease-emphasized);
}
.help svg {
  width: 15px;
  height: 15px;
}
.help:hover {
  background: var(--tertiary-container);
  color: var(--on-tertiary-container);
}

/* Result */
.result {
  background: linear-gradient(
    160deg,
    var(--surface-high),
    var(--surface-container)
  );
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-xl);
  padding: var(--sp-6);
  margin-bottom: var(--sp-6);
}
.result__head {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}
.result__hero {
  margin-bottom: var(--sp-6);
}
.result__hero .label {
  margin-bottom: var(--sp-1);
}
.result__amount {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 8vw, 2.8rem);
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  transition: color var(--dur-m) var(--ease-emphasized);
}
.result__grid {
  margin: 0;
  display: grid;
  gap: 0;
}
.result__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-4);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--outline-variant);
}
.result__row:last-of-type {
  border-bottom: none;
}
.result__row dt {
  color: var(--on-surface-variant);
  display: flex;
  align-items: center;
  gap: 6px;
}
.result__row dd {
  margin: 0;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.result__row--total {
  margin-top: var(--sp-2);
  padding-top: var(--sp-4);
  border-top: 2px solid var(--primary);
  border-bottom: none;
}
.result__row--total dt {
  color: var(--on-surface);
  font-weight: 600;
}
.result__row--total dd {
  font-size: 1.2rem;
  color: var(--on-surface);
}

/* Animated number flip on update */
.flip {
  animation: flip var(--dur-m) var(--ease-emphasized);
}
@keyframes flip {
  from {
    opacity: 0.35;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Filled button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  width: 100%;
  min-height: 48px;
  margin-top: var(--sp-4);
  padding: 0 var(--sp-6);
  font: inherit;
  font-weight: 600;
  color: var(--on-primary);
  background: var(--primary);
  border: none;
  border-radius: var(--shape-full);
  cursor: pointer;
  transition: filter var(--dur-s) var(--ease-emphasized),
    transform var(--dur-s) var(--ease-emphasized);
}
.btn svg {
  width: 18px;
  height: 18px;
}
.btn:hover {
  filter: brightness(1.06);
}
.btn:active {
  transform: scale(0.985);
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 35%, transparent);
}
.share__feedback {
  display: block;
  margin-top: var(--sp-2);
  min-height: 1.2em;
  color: var(--primary);
  font-size: 0.85rem;
  text-align: center;
}

/* Disclaimer */
.disclaimer {
  display: flex;
  gap: var(--sp-3);
  background: var(--tertiary-container);
  color: var(--on-tertiary-container);
  border-radius: var(--shape-l);
  padding: var(--sp-4) var(--sp-6);
}
.disclaimer svg {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  margin-top: 2px;
}
.disclaimer p {
  margin: 0;
  font-size: 0.9rem;
}

.footer {
  margin-top: var(--sp-8);
  text-align: center;
  color: var(--on-surface-variant);
  font-size: 0.82rem;
}

/* Tooltip */
.tooltip {
  position: absolute;
  max-width: 300px;
  background: var(--surface-highest);
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
  padding: var(--sp-4);
  border-radius: var(--shape-m);
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  z-index: 20;
  animation: pop var(--dur-s) var(--ease-emphasized);
}
@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(-4px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}
.tooltip[hidden] {
  display: none;
}
.tooltip__title {
  font-weight: 600;
  margin: 0 0 var(--sp-1);
}
.tooltip p {
  margin: 0 0 var(--sp-3);
  color: var(--on-surface-variant);
}
.tooltip button {
  background: transparent;
  border: none;
  color: var(--primary);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

@media (min-width: 640px) {
  .form {
    grid-template-columns: 1fr 1fr;
  }
  .field--full,
  .field--system,
  .field--fees {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}