/* ==========================================================================
   DeCA_App — Estilos globales
   Misma paleta y tipografía que DeCA_Manual, adaptable por cada instancia.
   ========================================================================== */

:root {
  --brand-obsidian: #0a0e1a;
  --brand-xpertblue: #1b4fd8;
  --brand-arctic: #4d9fec;
  --brand-mist: #f4f6fa;
  --brand-ember: #e8620a;
  --brand-pure: #ffffff;

  --color-primary: var(--brand-xpertblue);
  --color-primary-hover: #1642b8;

  --bg-app: var(--brand-mist);
  --bg-surface: var(--brand-pure);
  --text-main: var(--brand-obsidian);
  --text-muted: #64748b;
  --border-color: #e4e8f0;

  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.07);
  --radius-lg: 16px;
  --header-height: 64px;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Sora', var(--font-sans);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-app: #0a0e1a;
    --bg-surface: #121826;
    --text-main: #f4f6fa;
    --text-muted: #94a3b8;
    --border-color: #232c40;
  }
}

:root[data-theme="dark"] {
  --bg-app: #0a0e1a;
  --bg-surface: #121826;
  --text-main: #f4f6fa;
  --text-muted: #94a3b8;
  --border-color: #232c40;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 {
  font-family: var(--font-heading);
}

.app-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 20px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  height: 34px;
  width: auto;
  object-fit: contain;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
}

.app-main {
  flex: 1;
  max-width: 720px;
  width: 100%;
  margin: 32px auto;
  padding: 0 16px;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 28px;
}

.lead {
  color: var(--text-muted);
  line-height: 1.6;
}

.app-footer {
  padding: 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.app-footer a {
  color: var(--color-primary);
}

.app-main h1 {
  margin-bottom: 4px;
}

.app-main > .lead {
  margin-top: 0;
  margin-bottom: 24px;
}

fieldset.card {
  border: 1px solid var(--border-color);
  margin: 0 0 20px;
}

legend {
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 0 6px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.88rem;
}

.field-wide {
  grid-column: 1 / -1;
}

.field span {
  color: var(--text-muted);
}

.field input,
.field textarea {
  font: inherit;
  color: var(--text-main);
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 10px;
}

.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.field-checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

.field-checkbox-legend {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-main);
}

.field-checkbox input {
  width: 16px;
  height: 16px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 24px;
}

.btn-primary {
  font: inherit;
  font-weight: 600;
  color: var(--brand-pure);
  background: var(--color-primary);
  border: none;
  border-radius: 8px;
  padding: 10px 22px;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

#resultado-json {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  font-size: 0.82rem;
}

@media (max-width: 560px) {
  .field-grid {
    grid-template-columns: 1fr;
  }
}