:root {
  color-scheme: light;
  --navy: #0b2545;
  --celeste: #2f7bd6;
  --bg: #f5f7fa;
  --border: #dde2e8;
  --text: #1c2a3a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 16px 48px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

header {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 0 8px;
}

h1 {
  color: var(--navy);
  margin: 0 0 4px;
  font-size: 1.6rem;
}

.subtitulo {
  color: #55677d;
  margin: 0;
}

main {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

section {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

h2 {
  margin-top: 0;
  font-size: 1.1rem;
  color: var(--navy);
}

label {
  display: block;
  font-weight: 600;
  margin: 14px 0 6px;
  font-size: 0.9rem;
}

textarea, input[type="text"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}

.device-toggle {
  border: none;
  padding: 0;
  margin: 14px 0 0;
  display: flex;
  gap: 20px;
}

.device-toggle legend {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.opcion {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  margin: 0;
}

button {
  margin-top: 20px;
  background: var(--celeste);
  color: #fff;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.estado {
  margin-top: 12px;
  font-size: 0.9rem;
}

.estado.error { color: #c0392b; }
.estado.ok { color: #1a7f37; }

#img-resultado {
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: block;
  margin: 12px 0;
}

.acciones-resultado a {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
}

.grid-historial {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 14px;
}

.item-historial {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  font-size: 0.75rem;
  background: #fafbfc;
}

.item-historial img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  display: block;
  background: #eee;
}

.item-historial .meta {
  padding: 6px 8px;
}

.item-historial .meta strong {
  display: block;
  font-size: 0.8rem;
}