@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,600;0,700;1,400&family=Nunito:wght@400;600;700;800&display=swap');

:root {
  /* Paleta orgânica — folhas, terra, musgo, céu limpo */
  --leaf:          #3a7d44;
  --leaf-light:    #5aaa64;
  --leaf-pale:     #d6eed9;
  --moss:          #6b8f52;
  --bark:          #7a5c3e;
  --soil:          #c4a97a;
  --sky:           #a8d5e2;
  --sky-deep:      #5b9db8;
  --cream:         #faf6ee;
  --parchment:     #f0e9d6;
  --parchment-2:   #e8dfc8;

  --text:          #2d3a1e;
  --text-muted:    #6b7a58;
  --text-dim:      #a0a88c;

  --border:        rgba(58, 125, 68, 0.2);
  --border-bright: rgba(58, 125, 68, 0.45);

  --shadow-sm: 0 2px 8px rgba(45, 58, 30, 0.08);
  --shadow-md: 0 6px 24px rgba(45, 58, 30, 0.13);
  --shadow-lg: 0 14px 48px rgba(45, 58, 30, 0.18);

  --radius:    1.5rem;
  --radius-sm: 0.9rem;

  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  font-family: 'Nunito', sans-serif;
  color: var(--text);
  background-color: var(--cream);
  /* Textura de folhas/musgo com SVG inline */
  background-image:
    radial-gradient(ellipse 100% 50% at 50% 0%, rgba(168, 213, 226, 0.35) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Ccircle cx='20' cy='20' r='1.5' fill='%233a7d44' opacity='.07'/%3E%3Ccircle cx='80' cy='60' r='1' fill='%233a7d44' opacity='.06'/%3E%3Ccircle cx='40' cy='90' r='2' fill='%236b8f52' opacity='.05'/%3E%3Ccircle cx='100' cy='15' r='1.2' fill='%236b8f52' opacity='.07'/%3E%3Ccircle cx='60' cy='110' r='1' fill='%233a7d44' opacity='.05'/%3E%3C/svg%3E");
}

.hidden { display: none !important; }

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

/* ── Header ── */
.header {
  position: relative;
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  border-radius: 2.5rem 2.5rem 2rem 2rem;
  background: linear-gradient(160deg, #e8f5e3 0%, #d6eed9 60%, #c8e8cc 100%);
  border: 1.5px solid var(--border-bright);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.8);
  overflow: hidden;
}

/* Folha decorativa no canto */
.header::before {
  content: '🌿';
  position: absolute;
  right: 1.5rem; top: 1rem;
  font-size: 5rem;
  opacity: 0.12;
  transform: rotate(25deg);
  pointer-events: none;
  user-select: none;
}

.header__title {
  font-family: 'Lora', serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--leaf);
  letter-spacing: -0.01em;
  margin-bottom: 0.4rem;
}

.header__subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  max-width: 52ch;
}

/* ── Calculator card ── */
.calculator {
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 2rem;
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.calculator__form { display: grid; gap: var(--spacing-md); }
.calculator__field-group { display: flex; flex-direction: column; gap: 0.45rem; }

.calculator__label {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--moss);
  text-transform: uppercase;
}

.calculator__input, button { font: inherit; }

.calculator__input {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: var(--cream);
  border: 1.5px solid var(--parchment-2);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.calculator__input::placeholder { color: var(--text-dim); }
.calculator__input:focus {
  outline: none;
  border-color: var(--leaf);
  box-shadow: 0 0 0 4px rgba(58, 125, 68, 0.1);
  background: white;
}
.calculator__input--readonly {
  background: var(--leaf-pale);
  color: var(--leaf);
  cursor: not-allowed;
  border-color: var(--border);
}
.calculator__help-text { font-size: 0.78rem; color: var(--text-muted); }

.calculator__field-group--checkbox { flex-direction: row; align-items: center; gap: 0.6rem; }
.calculator__checkbox { width: 1rem; height: 1rem; accent-color: var(--leaf); cursor: pointer; }
.calculator__checkbox-label { font-size: 0.85rem; color: var(--text-muted); cursor: pointer; }

.calculator__transport-controls { border: none; padding: 0; }
.calculator__legend {
  font-size: 0.82rem; font-weight: 700; letter-spacing: 0.03em;
  text-transform: uppercase; color: var(--moss); margin-bottom: 0.75rem;
}

/* ── Transport grid ── */
.transport-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
@media (min-width: 600px) { .transport-grid { grid-template-columns: repeat(4, 1fr); } }

.transport-card {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 0.5rem; padding: 1rem 0.5rem;
  background: var(--cream);
  border: 1.5px solid var(--parchment-2);
  border-radius: 1.25rem;
  cursor: pointer; text-align: center;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s, background 0.2s;
}
.transport-card:hover {
  border-color: var(--leaf);
  background: var(--leaf-pale);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.transport-card input { position: absolute; opacity: 0; width: 0; height: 0; }
.transport-card__icon { font-size: 2.2rem; }
.transport-card__text {
  font-size: 0.78rem; font-weight: 700;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em;
}
.transport-card:has(input:checked) {
  border-color: var(--leaf);
  background: linear-gradient(135deg, #d6eed9, #e8f5e3);
  box-shadow: 0 4px 16px rgba(58, 125, 68, 0.18);
}
.transport-card:has(input:checked) .transport-card__text { color: var(--leaf); }

/* ── Buttons ── */
.calculator__submit,
.button--primary {
  width: 100%;
  background: var(--leaf);
  color: white;
  border: none;
  border-radius: 99px;
  padding: 1rem 1.5rem;
  font-family: 'Nunito', sans-serif;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(58,125,68,0.25);
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}
.calculator__submit:hover,
.button--primary:hover {
  background: var(--moss);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(58,125,68,0.3);
}
.calculator__submit:disabled,
.button--primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ── Spinner ── */
.spinner {
  display: inline-block; width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3); border-top-color: white;
  border-radius: 50%; animation: spin 0.8s linear infinite;
  vertical-align: middle; margin-right: 0.4rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Panels ── */
.results, .comparison, .carbon-credits {
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 2rem;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  animation: growIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  position: relative;
  overflow: hidden;
}

/* Detalhe orgânico no topo de cada painel */
.results::before, .comparison::before, .carbon-credits::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--leaf-pale), var(--leaf), var(--moss), var(--leaf-pale));
  border-radius: 2rem 2rem 0 0;
}

@keyframes growIn {
  from { opacity: 0; transform: scale(0.96) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* ── Results grid ── */
.results__content {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem;
}
@media (max-width: 500px) { .results__content { grid-template-columns: 1fr; } }

.results__card {
  background: var(--cream);
  border: 1.5px solid var(--parchment-2);
  border-radius: 1.25rem;
  padding: 1.1rem 1.2rem;
  display: flex; flex-direction: column; gap: 0.2rem;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.results__card:hover {
  border-color: var(--border-bright);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.results__title {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.1rem;
}
.results__value {
  font-family: 'Lora', serif;
  font-size: 1.35rem; font-weight: 700; color: var(--leaf);
}
.results__text { font-size: 0.95rem; color: var(--text); font-weight: 600; }
.results__subtitle { font-size: 0.78rem; color: var(--text-muted); }
.results__icon { font-size: 2rem; margin: 0.2rem 0; }

.results__card--savings {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, #e8f5e3, #d6eed9);
  border-color: var(--border-bright);
}
.results__card--savings .results__value {
  font-size: 1.5rem;
  color: var(--leaf);
}

/* ── Comparison ── */
.comparison__grid { display: flex; flex-direction: column; gap: 0.65rem; }

.comparison__item {
  background: var(--cream);
  border: 1.5px solid var(--parchment-2);
  border-radius: 1.1rem;
  padding: 0.9rem 1rem;
  transition: border-color 0.2s, background 0.2s;
}
.comparison__item--selected {
  border-color: var(--leaf);
  background: linear-gradient(135deg, #e8f5e3, #f0f9f1);
}

.comparison__header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.55rem; }
.comparison__icon { font-size: 1.5rem; }
.comparison__mode { font-weight: 700; font-size: 0.9rem; flex: 1; color: var(--text); }
.comparison__stats { font-size: 0.85rem; color: var(--leaf); font-weight: 700; }
.comparison__label { font-weight: bold; }

.comparison__badge {
  font-size: 0.65rem; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 0.2rem 0.6rem; border-radius: 99px;
  background: var(--leaf); color: white;
}

.comparison__body { display: flex; flex-direction: column; gap: 0.35rem; }
.comparison__percentage { font-size: 0.73rem; color: var(--text-muted); text-align: right; }

.comparison__bar-background, .comparison__bar-container {
  width: 100%; height: 7px;
  background: var(--leaf-pale);
  border-radius: 99px; overflow: hidden;
}
.comparison__bar {
  height: 100%; border-radius: 99px;
  transition: width 0.65s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.comparison__tip {
  margin-top: var(--spacing-md); padding: 0.9rem 1.1rem;
  border: 1.5px solid rgba(91,157,184,0.3);
  border-left: 4px solid var(--sky-deep);
  background: rgba(168,213,226,0.12);
  border-radius: var(--radius-sm);
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.55;
}

/* ── Carbon Credits ── */
.carbon-credits__grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem; margin-bottom: var(--spacing-md);
}
@media (max-width: 480px) { .carbon-credits__grid { grid-template-columns: 1fr; } }

.carbon-credits__card {
  background: var(--cream); border: 1.5px solid var(--parchment-2);
  border-radius: 1.25rem; padding: 1.25rem;
}
.carbon-credits__title {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 0.5rem;
}
.carbon-credits__value {
  font-family: 'Lora', serif;
  font-size: 2rem; font-weight: 700; color: var(--leaf);
}
.carbon-credits__text, .carbon-credits__hint, .carbon-credits__label {
  font-size: 0.78rem; color: var(--text-muted); margin-top: 0.4rem;
}

.carbon-credits__info {
  padding: 1rem 1.1rem;
  border: 1.5px dashed rgba(91,157,184,0.35);
  background: rgba(168,213,226,0.1);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.6;
}
.carbon-credits__info strong { color: var(--sky-deep); }
.carbon-credits__info p { line-height: 1.6; }

.carbon-credits__btn,
.carbon-credits__button,
.button {
  width: 100%;
  background: var(--leaf);
  color: white; border: none;
  border-radius: 99px; padding: 0.95rem 1.5rem;
  font-family: 'Nunito', sans-serif; font-weight: 800; font-size: 0.95rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(58,125,68,0.22);
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}
.carbon-credits__btn:hover,
.carbon-credits__button:hover,
.button:hover {
  background: var(--moss);
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(58,125,68,0.28);
}

/* ── Footer ── */
.footer { text-align: center; padding: var(--spacing-md) 0 var(--spacing-xs); }
.footer__text { font-size: 0.78rem; color: var(--text-dim); }