/* ============================================================
   Variables y reset
   ============================================================ */
:root {
  --bg:        #f0f2f5;
  --surface:   #ffffff;
  --border:    #dde1e7;
  --primary:   #1a6b3c;
  --primary-d: #124f2c;
  --accent:    #22c55e;
  --deduct:    #dc2626;
  --total:     #15803d;
  --text:      #1e2733;
  --muted:     #6b7280;
  --shadow:    0 1px 4px rgba(0,0,0,.10);
  --radius:    10px;
}

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

html { font-size: 15px; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ============================================================
   Header
   ============================================================ */
header {
  background: var(--primary);
  color: #fff;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
}

header .logo { font-size: 2rem; }

header h1 { font-size: 1.4rem; font-weight: 700; }
header p  { font-size: .85rem; opacity: .8; }

/* ============================================================
   Layout
   ============================================================ */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--accent);
}

/* ============================================================
   Formulario
   ============================================================ */
.form-card h2 { margin-bottom: 1.25rem; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

input[type="text"],
input[type="number"] {
  border: 1.5px solid var(--border);
  border-radius: 6px;
  padding: .55rem .75rem;
  font-size: .95rem;
  color: var(--text);
  outline: none;
  transition: border-color .2s;
  background: #fafafa;
  width: 100%;
}

input[type="text"]:focus,
input[type="number"]:focus {
  border-color: var(--accent);
  background: #fff;
}

/* Radio/Checkbox row */
.radio-row, .check-row {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

.radio-row label,
.check-row label {
  font-size: .9rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .3rem;
}

input[type="radio"],
input[type="checkbox"] {
  accent-color: var(--primary);
  width: 1rem;
  height: 1rem;
}

.mixto-section {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.mixto-section .form-group { min-width: 140px; }

.hint {
  font-size: .78rem;
  color: var(--muted);
  margin-top: .2rem;
}

.form-actions {
  margin-top: 1.5rem;
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}

/* ============================================================
   Botones
   ============================================================ */
.btn {
  padding: .6rem 1.4rem;
  border: none;
  border-radius: 7px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s, transform .1s;
}

.btn:active { transform: scale(.97); }

.btn-primary  { background: var(--primary); color: #fff; }
.btn-primary:hover { filter: brightness(1.12); }

.btn-success  { background: var(--accent); color: #fff; }
.btn-success:hover { filter: brightness(1.08); }

.btn-ghost {
  background: transparent;
  border: 1.5px solid var(--border);
  color: var(--muted);
}
.btn-ghost:hover { background: var(--bg); }

.btn-sm {
  padding: .3rem .7rem;
  font-size: .8rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 600;
}

.btn-view   { background: #dbeafe; color: #1d4ed8; }
.btn-view:hover { background: #bfdbfe; }
.btn-delete { background: #fee2e2; color: #dc2626; }
.btn-delete:hover { background: #fecaca; }

/* ============================================================
   Panel de resultados
   ============================================================ */
#resultsPanel { display: none; }

.grid-2col {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-info  { border-left: 4px solid var(--primary); }
.card-extra { border-left: 4px solid #8b5cf6; }
.card-main  { border-left: 4px solid var(--accent); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}

.data-table td {
  padding: .4rem .5rem;
  border-bottom: 1px solid #f0f0f0;
}

.data-table td:last-child {
  text-align: right;
  font-weight: 500;
  color: var(--primary-d);
}

.data-table tr.highlight td { background: #f0fdf4; font-weight: 700; }

/* Tabla comparativa mensual/anual */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}

.comparison-table th {
  background: var(--primary);
  color: #fff;
  padding: .65rem .75rem;
  text-align: left;
}

.comparison-table th:not(:first-child) { text-align: right; }

.comparison-table td {
  padding: .45rem .75rem;
  border-bottom: 1px solid #f3f4f6;
}

.comparison-table td:not(:first-child) {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.comparison-table .section-header td {
  background: #f0fdf4;
  font-weight: 700;
  color: var(--primary);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .5rem .75rem .3rem;
}

.comparison-table .deduction td { color: var(--deduct); }

.comparison-table .subtotal td {
  border-top: 2px solid var(--border);
  background: #fafafa;
}

.comparison-table .total-row td {
  background: #f0fdf4;
  color: var(--total);
  font-size: 1rem;
  border-top: 2px solid var(--accent);
}

/* ============================================================
   Tabla de proyecciones
   ============================================================ */
#projectionsSection h2 { margin-bottom: 1rem; }

.table-scroll { overflow-x: auto; }

.proj-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .87rem;
  min-width: 900px;
}

.proj-table th {
  background: #1e3a2f;
  color: #fff;
  padding: .6rem .75rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.proj-table td {
  padding: .5rem .75rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.proj-table tr:hover td { background: #f0fdf4; }

.actions-cell { display: flex; gap: .4rem; }

.empty-msg {
  color: var(--muted);
  padding: 1.5rem;
  text-align: center;
  font-style: italic;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 600px) {
  main { padding: 1rem; }
  header { padding: 1rem; }
  header h1 { font-size: 1.1rem; }
}