:root {
  /* Eco-friendly color palette */
  --primaria: #2e7d32;
  --scundaria: #66bb6a;
  --terciaria: #a5d6a7;

  --danger: #d32f2f;
  --warning: #f9a825;
  --info: #0288d1;

  --text: #1f2937;
  --text-light: #5f6f65;
  --bg: #78e439;
  --white: #ffffff;

  /* Spacing scale */
  --spacing-2xs: 0.25rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  --radius: 12px;
  --radius-lg: 18px;

  --shadow: 0 6px 16px rgba(21, 101, 52, 0.08);
  --shadow-md: 0 12px 28px rgba(21, 101, 52, 0.12);
  --shadow-lg: 0 18px 42px rgba(21, 101, 52, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(90deg, #fff27f 0%, var(--bg) 100%);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.top-header {
  background: var(--white);
  border-bottom: 1px solid #dbeadf;
  box-shadow: var(--shadow);
}

.top-header .container {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.top-header h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  color: #0f766e; /* verde azulado */
}

.top-header .subtitle {
  margin: var(--spacing-xs) 0 0;
  color: var(--text-light);
  font-size: 1rem;
}

.hidden {
  display: none !important;
}

.page-content {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.card {
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  background: var(--white);
  border: 1px solid #d8e8db;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

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

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

input[type="text"],
input[type="number"] {
  width: 100%;
  border: 1px solid #cfe2d2;
  border-radius: var(--radius);
  padding: 0.75rem 0.85rem;
  background: #fbfefb;
  color: var(--text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus {
  outline: none;
  border-color: var(--scundaria);
  box-shadow: 0 0 0 4px rgba(102, 187, 106, 0.2);
}

.check-inline {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-light);
}

.transport-options {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.transport-card {
  border: 1px solid #d7e7da;
  border-radius: var(--radius);
  background: #f8fcf8;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.transport-card .emoji {
  font-size: 2rem;
  line-height: 1;
}

.transport-card .name {
  font-weight: 600;
  color: var(--text);
}

.transport-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.transport-card.selected {
  border-color: var(--primaria);
  background: #eef8f0;
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.15);
}

button[type="submit"] {
  width: 100%;
  border: 0;
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
  background: linear-gradient(135deg, var(--primaria), var(--scundaria));
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

button[type="submit"]:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  filter: saturate(1.05);
}

.result {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  border-radius: var(--radius);
  border: 1px dashed #9ec8a5;
  background: linear-gradient(180deg, #f3fbf4, #edf8ef);
  color: var(--text);
}

.results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.results_card {
  background: #fbfefb;
  border: 1px solid #d8e8db;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: var(--spacing-lg);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.results_card:hover {
  transform: translateY(-2px);
  border-color: #b7d9bf;
  box-shadow: 0 18px 40px rgba(21, 101, 52, 0.18);
}

.results_card__title {
  font-weight: 800;
  color: var(--primaria);
}

.results_card__value {
  word-break: break-word;
}

/* Mobile: volta para 1 coluna */
@media (max-width: 768px) {
  .results {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .transport-options {
    grid-template-columns: repeat(2, minmax(140px, 1fr));
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .card {
    padding: var(--spacing-lg);
  }

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

.site-footer {
  background: var(--white);
  text-align: center;
  padding: var(--spacing-md) 0;
  border-top: 1px solid #dbeadf;
}

.site-footer p {
  margin: 0;
}