:root {
  --ink: #16232b;
  --muted: #64747e;
  --line: #dbe2e6;
  --accent: #087f8c;
  --paper: #f3f6f7;
  --radius: 12px;
  --shadow: 0 18px 40px rgba(16, 35, 43, .07);
  --container: 1180px;
  --gutter: clamp(16px, 3vw, 22px);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
  color: var(--ink);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }

/* ================= Encabezado ================= */
.site-header {
  background-image: linear-gradient(135deg, #05323a 0%, #076c77 52%, #0a9aa8 100%);
  color: #fff;
  box-shadow: 0 12px 32px rgba(5, 50, 58, .28);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(14px, 2.5vw, 22px) var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

/* Sin tarjeta y con el PNG original completo: el arte ya trae su propio
   fondo/halo y flota sobre el degradado. No recortar la imagen: el arte
   llega hasta x=680 de 705 y el blanco toca el borde izquierdo. */
.brand-logo {
  height: clamp(54px, 7.5vw, 80px);
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-text {
  min-width: 0;
  margin-left: clamp(14px, 2.2vw, 22px);
  padding-left: clamp(14px, 2.2vw, 22px);
  border-left: 1px solid rgba(255, 255, 255, .26);
}
.brand-name {
  display: block;
  font-size: clamp(1.02rem, 2.3vw, 1.26rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.01em;
}
.brand-tagline {
  display: block;
  margin-top: 4px;
  font-size: clamp(.78rem, 1.6vw, .88rem);
  color: rgba(255, 255, 255, .85);
}

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 999px;
  background-color: rgba(255, 255, 255, .12);
  font-size: .82rem;
  font-weight: 600;
  white-space: nowrap;
}
.header-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #6ff0c4;
  box-shadow: 0 0 0 4px rgba(111, 240, 196, .22);
}

/* ================= Contenido ================= */
main {
  flex: 1;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(22px, 4vw, 40px) var(--gutter) clamp(40px, 6vw, 64px);
  display: flex;
  flex-direction: column;
  gap: clamp(22px, 3vw, 32px);
}

.panel {
  background-color: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 34px);
  box-shadow: var(--shadow);
}

.panel-title {
  margin: 0 0 10px;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -.015em;
}

.panel-hint {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  max-width: 62ch;
  color: var(--muted);
}

/* ---------- Formulario ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1.45fr auto;
  gap: clamp(14px, 2vw, 20px);
  align-items: end;
}

.field { min-width: 0; }

.field label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
}

/* Envoltura para poder colocar el icono dentro del campo */
.control { position: relative; }

.control-icon {
  position: absolute;
  top: 50%;
  left: 15px;
  width: 19px;
  height: 19px;
  color: #93a3ab;
  transform: translateY(-50%);
  pointer-events: none;
  transition: color .15s;
}
.control:hover .control-icon { color: #6d7d86; }
.control:focus-within .control-icon { color: var(--accent); }

.field input {
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  border: 1px solid #c3ced3;
  border-radius: 8px;
  background-color: #fbfcfc;
  color: inherit;
  font: inherit;
  text-transform: uppercase;
  transition: border-color .15s, box-shadow .15s, background-color .15s;
}
/* Deja libre la zona del icono (debe ir despues de .field input) */
.field .control input { padding-left: 47px; }
.field input::placeholder { color: #9aa8ae; text-transform: none; }
.field input:hover { border-color: #a4b2b8; }
.field input:focus {
  outline: none;
  background-color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(8, 127, 140, .15);
}

button,
.print-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 11px 28px;
  border: 0;
  border-radius: 8px;
  background-image: linear-gradient(180deg, #0a8d9a, #06707c);
  color: #fff;
  font: inherit;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 8px 18px rgba(8, 127, 140, .28);
  transition: filter .15s, box-shadow .15s, transform .12s;
}
button svg,
.print-link svg { width: 18px; height: 18px; flex-shrink: 0; }
button:hover:not(:disabled),
.print-link:hover { filter: brightness(1.07); box-shadow: 0 10px 22px rgba(8, 127, 140, .34); }
button:active:not(:disabled),
.print-link:active { transform: translateY(1px); }
button:disabled { opacity: .65; cursor: wait; box-shadow: none; }
button:focus-visible,
.print-link:focus-visible { outline: 3px solid rgba(8, 127, 140, .4); outline-offset: 2px; }

/* ---------- Mensajes de error ---------- */
#message:empty { display: none; }
#message:not(:empty) {
  margin-top: 20px;
  padding: 13px 16px;
  border: 1px solid #f0c8bd;
  border-left: 4px solid #c0492a;
  border-radius: 8px;
  background-color: #fdf4f1;
  color: #9a3d25;
  font-size: .92rem;
}

/* ---------- Resultados ---------- */
/* El título y la tarjeta los aporta el parcial historial_rtv.html,
   con sus estilos en historial_rtv.css. */
.results-section { min-width: 0; }

#results { min-width: 0; }

/* ================= Pie ================= */
.site-footer {
  padding: 22px var(--gutter);
  border-top: 1px solid var(--line);
  background-color: #fff;
}
.site-footer p {
  max-width: var(--container);
  margin: 0 auto;
  color: var(--muted);
  font-size: .85rem;
  text-align: center;
}

/* ================= Adaptabilidad ================= */
@media (max-width: 860px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-grid button { width: 100%; }
}

@media (max-width: 560px) {
  .header-inner { flex-direction: column; align-items: flex-start; }
  .brand-logo { height: 58px; }
  .panel { border-radius: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}