/*
  mnemos-landing — hoja de estilos
  Fuente única de tokens/valores: .contrato/design-tokens.json (E4, contrato de fidelidad).
  Fuente de estructura/tratamiento por componente: .contrato/component-map.md.
  Regla de oro del contrato: estos valores son EXACTOS y obligatorios — no se aproximan ni se reinventan.
  Excluidos a propósito (fuera de contrato, herramientas del mockup, no del producto): #dev-panel, .mock-footer.
*/

:root {
  --color-paper: #faf7f2;
  --color-paper-alt: #efe9df;
  --color-ink: #1c1a17;
  --color-ink-90: rgba(28, 26, 23, .9);
  --color-ink-80: rgba(28, 26, 23, .8);
  --color-ink-70: rgba(28, 26, 23, .7);
  --color-ink-65: rgba(28, 26, 23, .65);
  --color-ink-60: rgba(28, 26, 23, .6);
  --color-ink-40: rgba(28, 26, 23, .4);
  --color-ink-10: rgba(28, 26, 23, .1);
  --color-ink-08: rgba(28, 26, 23, .08);
  --color-ink-05: rgba(28, 26, 23, .05);
  --color-accent: #b44a2a;
  --color-accent-pressed: #a4441f;
  --color-error: #9c4a2f;
  --radius-control: 4px;
  --radius-pill: 999px;

  --font-display: Georgia, 'Iowan Old Style', 'Palatino Linotype', 'Times New Roman', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, Helvetica, Arial, sans-serif;

  --content-width-hero: 42rem;
  --content-width: 40rem;
  --space-hero-top: 3rem;
  --space-section-y: 3rem;
  --space-vision-y: 4rem;
  --space-panel: 1.5rem;
  --space-panel-gap: 0.5rem;
  --space-field-gap: 1.25rem;

  --motion-duration-micro: 100ms;
  --motion-duration-toggle: 200ms;
  --motion-duration-transition: 280ms;
  --motion-duration-error: 150ms;
  --motion-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --motion-ease-in: ease-in;
  --motion-distance-subtle: 4px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; margin: 0 0 .6em; color: var(--color-ink); }
p { margin: 0 0 1em; }
a { color: var(--color-ink); }
.wrap { max-width: var(--content-width); margin: 0 auto; padding: 0 1.5rem; }
main { padding-bottom: 4rem; }

/* ============ Header (F1 / review / thanks / privacidad) ============ */
.hero-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1.25rem 1.5rem 0; max-width: var(--content-width-hero); margin: 0 auto;
}
.wordmark { font-family: var(--font-display); font-weight: 600; font-size: 1.1rem; letter-spacing: .02em; }
.wordmark a { text-decoration: none; color: var(--color-ink); }
.anchor-nav { display: flex; gap: 1rem; font-size: .85rem; }
.anchor-nav a { text-decoration: none; color: var(--color-ink-70); border-bottom: 1px solid transparent; transition: border-color var(--motion-duration-micro) var(--motion-ease-out); }
.anchor-nav a:hover { border-color: var(--color-ink-40); }

/* ============ F1 · Hero ============ */
.hero { max-width: var(--content-width-hero); margin: 0 auto; padding: var(--space-hero-top) 1.5rem var(--space-section-y); }
.hero h1 { font-size: 2.5rem; line-height: 1.18; max-width: 72ch; }
@media (max-width: 640px) { .hero h1 { font-size: 1.75rem; } }
.hero .subhead { font-size: 1.125rem; color: var(--color-ink-80); max-width: 60ch; }
.hero .routes { display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap; }

/* ============ CTA / botones ============ */
.btn {
  display: inline-block; font-family: var(--font-body); font-size: 1rem; font-weight: 600;
  padding: .85rem 1.5rem; border-radius: var(--radius-control); cursor: pointer; text-decoration: none;
  border: 1.5px solid transparent;
  transition: background-color var(--motion-duration-micro) var(--motion-ease-out),
              border-color var(--motion-duration-micro) var(--motion-ease-out);
}
.btn:focus-visible { outline: 2px solid var(--color-ink); outline-offset: 2px; }
.btn-primary { background: var(--color-accent); color: var(--color-paper); border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-pressed); border-color: var(--color-accent-pressed); }
.btn-primary:active { background: #8f3a1a; }
.btn-primary[disabled] { opacity: .6; cursor: wait; }
.btn-secondary { background: transparent; color: var(--color-ink); border-color: var(--color-ink); }
.btn-secondary:hover { background: var(--color-ink-05); }

/* ============ Secciones generales ============ */
section.block { max-width: var(--content-width); margin: 0 auto; padding: var(--space-section-y) 1.5rem; }
section.block h2 { font-size: 1.5rem; }

/* F2 · Problema — TEXTURA APROXIMADA (gradiente CSS, sin imagen real: producción de imagen falló, Higgsfield 403) */
#f2 { background: linear-gradient(135deg, var(--color-paper) 60%, var(--color-paper-alt) 100%); }

/* F3 · Cómo funciona */
.steps { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; margin: 1rem 0 1.5rem; padding: 0; list-style: none; }
.steps li { font-size: .95rem; color: var(--color-ink-80); }
.steps li b { color: var(--color-ink); }
blockquote.objecion {
  font-family: var(--font-display); font-size: 1.25rem; font-style: italic;
  border-left: 3px solid var(--color-ink-10); margin: 1.5rem 0; padding: .25rem 0 .25rem 1.25rem;
  color: var(--color-ink-90);
}

/* details-toggle nativo (F3/F4) */
details { margin: .75rem 0; }
details > summary {
  cursor: pointer; font-weight: 600; list-style: none; display: flex; align-items: center; gap: .5rem;
  padding: .5rem 0;
}
details > summary::-webkit-details-marker { display: none; }
details > summary .arrow { display: inline-block; transition: transform var(--motion-duration-toggle) var(--motion-ease-out); }
details[open] > summary .arrow { transform: rotate(90deg); }
details .panel-body {
  padding: var(--space-panel) 0 var(--space-panel) 0;
  opacity: 0; transform: translateY(var(--motion-distance-subtle));
  transition: opacity var(--motion-duration-toggle) var(--motion-ease-out),
              transform var(--motion-duration-toggle) var(--motion-ease-out);
}
details[open] .panel-body { opacity: 1; transform: translateY(0); }
.badge {
  display: inline-block; font-size: .75rem; border: 1px solid var(--color-ink-40); color: var(--color-ink);
  border-radius: var(--radius-pill); padding: .15rem .6rem; margin-top: .5rem;
}
.quote-example { font-family: var(--font-display); font-size: 1.1rem; }

/* F4 · trust-accordion */
#f4 .panel { border-top: 1px solid var(--color-ink-10); }
#f4 .panel:last-child { border-bottom: 1px solid var(--color-ink-10); }
#f4 details { margin: 0; padding: .25rem 0; }
#f4 details + details { margin-top: var(--space-panel-gap); }
#f4 .sub-toggle summary { font-weight: 500; font-size: .9rem; color: var(--color-ink-60); }
#f4 .sub-toggle .arrow { font-size: .8rem; }

/* F5 · Visión — muted obligatorio, cero acento, itálica */
#f5 {
  background: var(--color-paper-alt);
  margin-top: var(--space-vision-y); margin-bottom: var(--space-vision-y);
  padding-top: var(--space-vision-y); padding-bottom: var(--space-vision-y);
}
#f5 h2 { color: var(--color-ink-65); }
#f5 p { color: var(--color-ink-65); font-style: italic; font-size: 1rem; max-width: 60ch; }

/* F6a · Formulario */
#f6a .form-field { margin-bottom: var(--space-field-gap); display: flex; flex-direction: column; gap: .35rem; }
#f6a label { font-weight: 600; font-size: .9rem; }
#f6a .aux { font-size: .8rem; color: var(--color-ink-60); margin-top: -.15rem; }
#f6a input[type="text"], #f6a input[type="email"], #f6a select, #f6a textarea {
  font-family: var(--font-body); font-size: 1rem; padding: .65rem .75rem;
  border: 1.5px solid var(--color-ink-40); border-radius: var(--radius-control); background: var(--color-paper);
  color: var(--color-ink);
}
#f6a input:focus-visible, #f6a select:focus-visible, #f6a textarea:focus-visible {
  outline: 2px solid var(--color-ink); outline-offset: 1px;
}
#f6a input[aria-invalid="true"], #f6a select[aria-invalid="true"] { border-color: var(--color-error); }
.field-error { font-size: .85rem; color: var(--color-error); margin: 0; }
.field-error.show { opacity: 1; }
.consent-row { display: flex; align-items: flex-start; gap: .6rem; }
.consent-row input { margin-top: .3rem; }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* F6b · review-summary */
.review-list { margin: 1.5rem 0; }
.review-row { display: flex; justify-content: space-between; gap: 1rem; padding: .6rem 0; border-bottom: 1px solid var(--color-ink-08); }
.review-row .label { color: var(--color-ink-70); font-size: .85rem; text-transform: uppercase; letter-spacing: .02em; min-width: 9rem; }
.review-row .value { color: var(--color-ink); font-size: 1rem; flex: 1; }
.review-row .edit-link { font-size: .9rem; color: var(--color-ink-70); text-decoration: underline; white-space: nowrap; background: none; border: none; cursor: pointer; font-family: inherit; padding: .75rem 0; margin: -.75rem 0; }
.review-row .edit-link:hover { color: var(--color-ink); }
.confirmation-copy { margin: 1.5rem 0; font-size: 1rem; }

.error-banner {
  background: var(--color-paper-alt); border: 1.5px solid var(--color-error); color: var(--color-error);
  border-radius: var(--radius-control); padding: 1rem 1.25rem; margin-bottom: 1.5rem; font-size: .95rem;
}

/* F7 · footer legal — TEXTURA APROXIMADA (gradiente, sin imagen real) */
#f7 { background: linear-gradient(160deg, var(--color-paper-alt) 0%, var(--color-paper) 55%); border-top: 1px solid var(--color-ink-10); padding-top: 2.5rem; padding-bottom: 2.5rem; }
#f7 .legal { font-size: .8rem; color: var(--color-ink-60); display: flex; gap: 1.25rem; flex-wrap: wrap; }
#f7 .legal a { color: var(--color-ink-60); }

/* F8 · gracias / review — contenedores hero-width */
.thanks-wrap, .review-wrap { max-width: var(--content-width-hero); margin: 0 auto; padding: 4rem 1.5rem; }
.thanks-wrap h1, .review-wrap h1 { font-size: 2rem; }

/* Aviso de privacidad (página dedicada /privacidad) */
.privacy-panel {
  background: var(--color-paper-alt); border: 1px solid var(--color-ink-10); border-radius: var(--radius-control);
  padding: 1.25rem; margin-top: 1rem; font-size: .85rem; color: var(--color-ink-80);
}
.privacy-panel .placeholder-flag { font-weight: 700; color: var(--color-error); display: block; margin-bottom: .5rem; }

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0ms !important; animation-duration: 0ms !important; }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}