/* ═══════════════════════════════════════════
   Riego-Calc — Estilos
   ═══════════════════════════════════════════ */

:root {
  --bg: #f5f3ef;
  --bg-card: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --accent: #2d6a4f;
  --accent-light: #40916c;
  --accent-bg: #d8f3dc;
  --border: #d4d0c8;
  --danger: #c1440e;
  --warning-bg: #fff3cd;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "Fira Code", "JetBrains Mono", monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: var(--accent);
  color: white;
  padding: 2rem 0;
  text-align: center;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-top: 0.25rem;
}

.method-badge {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: rgba(255,255,255,0.15);
  border-radius: 20px;
  font-size: 0.8rem;
  opacity: 0.85;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 1.5rem;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-bg);
}

/* Method toggle */
.method-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.toggle-option {
  display: block;
  padding: 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.toggle-option:hover { border-color: var(--accent-light); }

.toggle-option.active {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.toggle-option input { display: none; }

.toggle-label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
}

.toggle-desc {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group.full-width { grid-column: 1 / -1; }

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.form-group .optional {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.form-group .hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

input[type="number"],
input[type="date"],
select {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: var(--font);
  background: white;
  transition: border-color 0.2s;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45,106,79,0.12);
}

/* Crop info card */
.crop-info {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--accent-bg);
  border-radius: 6px;
  font-size: 0.85rem;
  line-height: 1.7;
}

.crop-info .crop-tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-right: 0.5rem;
}

.crop-tag.abandonado { background: #fde68a; color: #92400e; }
.crop-tag.estrategico { background: #bfdbfe; color: #1e40af; }

/* Hidden PM fields when Hargreaves selected */
body.method-hs .pm-only { display: none; }

/* Buttons */
.calc-actions {
  margin-top: 1.5rem;
  text-align: center;
}

.btn-primary {
  padding: 0.85rem 2.5rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.btn-primary:hover { background: var(--accent-light); }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  padding: 0.65rem 1.5rem;
  background: white;
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

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

/* Results */
.result-card { border-left: 4px solid var(--accent); }

.result-hero {
  text-align: center;
  padding: 1.5rem 0;
}

.big-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--mono);
}

.unit {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
}

.hero-meta {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Tables */
.table-wrapper { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

thead th {
  background: var(--accent);
  color: white;
  padding: 0.6rem 0.75rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

thead th:first-child { border-radius: 6px 0 0 0; }
thead th:last-child { border-radius: 0 6px 0 0; }

tbody td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

tbody tr:hover { background: #f8f8f6; }

tbody tr.irrigate-row { background: var(--accent-bg); }

.calendar-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* Totals */
.totals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.total-item {
  text-align: center;
  padding: 1rem;
  background: var(--bg);
  border-radius: 6px;
}

.total-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.total-value {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--mono);
  margin: 0.25rem 0;
}

.total-unit {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Export */
.export-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin: 1.5rem 0 3rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

footer a { color: var(--accent); }
footer p + p { margin-top: 0.25rem; }

/* Utility */
.hidden { display: none !important; }

/* Responsive */
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .method-toggle { grid-template-columns: 1fr; }
  .totals-grid { grid-template-columns: 1fr 1fr; }
  header h1 { font-size: 1.5rem; }
  .big-number { font-size: 2.2rem; }
  .export-actions { flex-direction: column; align-items: center; }
}