/* ============================================================
   DISEÑO GENERAL
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

:root {
  --bg:        #0b0f1a;
  --bg2:       #111827;
  --bg3:       #1a2235;
  --border:    rgba(255,255,255,0.07);
  --text:      #e2e8f0;
  --text-muted:#94a3b8;
  --accent:    #38bdf8;
  --accent2:   #818cf8;
  --green:     #34d399;
  --red:       #f87171;
  --yellow:    #fbbf24;
  --radius:    14px;
  --shadow:    0 4px 32px rgba(0,0,0,0.4);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ============================================================
   HEADER
   ============================================================ */
header {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 1.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
header::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(56,189,248,0.12) 0%, transparent 65%);
  pointer-events: none;
}
.header-badge {
  display: inline-block;
  background: rgba(56,189,248,0.12);
  border: 1px solid rgba(56,189,248,0.3);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.9rem;
  border-radius: 99px;
  margin-bottom: 1rem;
}
header h1 {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #e2e8f0, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.6rem;
}
header p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

/* ============================================================
   NAVEGACIÓN POR TABS
   ============================================================ */
.tabs-nav {
  display: flex;
  gap: 0.25rem;
  justify-content: center;
  padding: 1.25rem 1rem 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
  flex-wrap: wrap;
}
.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
  display: flex; align-items: center; gap: 0.5rem;
}
.tab-btn:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: rgba(56,189,248,0.06);
}

/* ============================================================
   CONTENIDO PRINCIPAL
   ============================================================ */
main { max-width: 960px; margin: 0 auto; padding: 2rem 1.25rem; }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ============================================================
   TARJETAS / CARDS
   ============================================================ */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}
.card-title {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.1rem;
}

/* ============================================================
   FORMULARIOS
   ============================================================ */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
@media (max-width: 540px) { .form-row { grid-template-columns: 1fr; } }

.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
}
.field input, .field select {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  padding: 0.65rem 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  appearance: none;
}
.field input:focus, .field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56,189,248,0.15);
}
.field .hint { font-size: 0.74rem; color: var(--text-muted); }

/* ============================================================
   MÉTRICAS GRANDES
   ============================================================ */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.metric {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  transition: transform 0.2s;
}
.metric:hover { transform: translateY(-2px); }
.metric-label {
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}
.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.metric-sub { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.15rem; }
.metric.accent  .metric-value { color: var(--accent); }
.metric.green   .metric-value { color: var(--green); }
.metric.yellow  .metric-value { color: var(--yellow); }
.metric.red     .metric-value { color: var(--red); }
.metric.purple  .metric-value { color: var(--accent2); }

/* ============================================================
   TABLA DE DESGLOSE
   ============================================================ */
.breakdown { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.breakdown th {
  text-align: left;
  padding: 0.55rem 0.75rem;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.breakdown td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  vertical-align: top;
}
.breakdown tr:last-child td { border-bottom: none; }
.breakdown .section-head td {
  background: rgba(255,255,255,0.03);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 1rem;
}
.breakdown .total-row td { font-weight: 700; border-top: 1px solid var(--border); }
.text-right { text-align: right; }
.val-pos { color: var(--green); }
.val-neg { color: var(--red); }
.val-neu { color: var(--yellow); }
.badge-tramo {
  display: inline-block;
  background: rgba(129,140,248,0.15);
  color: var(--accent2);
  border-radius: 4px;
  font-size: 0.72rem;
  padding: 0.1rem 0.4rem;
  font-weight: 600;
}

/* ============================================================
   BARRA DE PROGRESO (tipo efectivo)
   ============================================================ */
.bar-wrap { background: var(--bg3); border-radius: 99px; height: 8px; overflow: hidden; margin-top: 0.4rem; }
.bar-fill { height: 100%; border-radius: 99px; transition: width 0.5s ease; }
.bar-accent { background: linear-gradient(90deg, var(--accent), var(--accent2)); }
.bar-green  { background: linear-gradient(90deg, #10b981, #34d399); }
.bar-red    { background: linear-gradient(90deg, #ef4444, #f87171); }

/* ============================================================
   GRÁFICO
   ============================================================ */
.chart-wrap {
  position: relative;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.chart-wrap canvas { max-height: 340px; }

/* ============================================================
   TABLA NORMATIVA
   ============================================================ */
.norm-table-wrap { overflow-x: auto; }
.norm-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
  white-space: nowrap;
}
.norm-table th {
  background: var(--bg3);
  padding: 0.6rem 0.8rem;
  text-align: right;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.norm-table th:first-child { text-align: left; }
.norm-table td {
  padding: 0.55rem 0.8rem;
  text-align: right;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.norm-table td:first-child { text-align: left; font-weight: 600; color: var(--accent); }
.norm-table tr:hover td { background: rgba(255,255,255,0.025); }

/* ============================================================
   CALLOUT / NOTA EDUCATIVA
   ============================================================ */
.callout {
  display: flex; gap: 0.75rem; align-items: flex-start;
  background: rgba(56,189,248,0.07);
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1.25rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.callout .icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 0.1rem; }
.callout strong { color: var(--text); }

/* ============================================================
   SECTION TITLE
   ============================================================ */
.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}
.section-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  header { padding: 1.75rem 1rem 1.5rem; }
}
@media (max-width: 400px) {
  .metrics-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   UTILIDADES
   ============================================================ */
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.hidden { display: none !important; }