/* ==========================================================================
   Santiago — Tarjeta digital
   Mobile-first · sin dependencias · 1 archivo CSS
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  /* Superficie */
  --bg:        #EEEBE5;   /* hueso / piedra */
  --bg-deep:   #E6E2DA;   /* subsuelo, un tono más abajo */
  --ink:       #1A1917;   /* casi negro */
  --ink-2:     #4A4843;   /* texto secundario */
  --ink-3:     #8A867E;   /* texto terciario */
  --line:      color-mix(in oklab, var(--ink) 12%, transparent);

  /* Acento (se sobrescribe por data-accent) */
  --accent:    #4F5437;
  --accent-ink:#F4F2EC;
  --accent-hover:  color-mix(in oklab, var(--accent) 86%, black);
  --accent-soft:   color-mix(in oklab, var(--accent) 14%, transparent);

  /* Tipografía */
  --serif: "Instrument Serif", "Iowan Old Style", "Times New Roman", serif;
  --sans:  "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Movimiento: curvas "emphasized" sin overshoot */
  --ease-out:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast: 180ms;
  --t-base: 320ms;
  --t-slow: 640ms;

  /* Espaciado (escala 4pt) */
  --gutter: clamp(1.5rem, 6vw, 3rem);
  --radius: 999px;
}

/* Variantes de acento — cambiá data-accent en <html> */
:root[data-accent="olive"]    { --accent: #4F5437; }
:root[data-accent="burgundy"] { --accent: #6B2433; }
:root[data-accent="steel"]    { --accent: #4A5561; }

/* ---------- 2. Reset mínimo ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-width: none;          /* Firefox */
  -ms-overflow-style: none;       /* Edge legacy */
}
html::-webkit-scrollbar { display: none; }  /* Chrome / Safari / Edge */
body {
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 1.5px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

/* ---------- 3. Textura: ruido de material ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0.055;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

/* ---------- 4. La Superficie ---------- */
.surface {
  position: relative;
  height: 100vh;            /* fallback */
  height: 100svh;
  height: 100dvh;
  min-height: 34rem;        /* evita colapso en landscape muy bajo */
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding:
    max(var(--gutter), env(safe-area-inset-top))
    max(var(--gutter), env(safe-area-inset-right))
    max(1.25rem, env(safe-area-inset-bottom))
    max(var(--gutter), env(safe-area-inset-left));
  max-width: 44rem;
  margin-inline: auto;
}

.surface__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}
.mark {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1;
}
.eyebrow {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* Contenido anclado abajo: zona del pulgar */
.surface__body {
  align-self: end;
  padding-bottom: clamp(1.5rem, 5vh, 3rem);
}

.name {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(3.5rem, 17vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: -0.025em;
  margin-left: -0.04em;     /* compensación óptica */
}
.name__last {
  display: block;
  font-style: italic;
  color: var(--ink-2);
  padding-left: 0.02em;
}

.tagline {
  margin-top: 1rem;
  font-family: var(--serif);
  font-size: clamp(1.375rem, 5.6vw, 1.875rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 20ch;
}
.tagline em { font-style: italic; color: var(--ink-2); }

.lead {
  margin-top: 1.25rem;
  max-width: 36ch;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ink-2);
}

.actions {
  margin-top: clamp(1.75rem, 4.5vh, 2.5rem);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.75rem;
}

/* ---------- 5. Botón principal ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 3.5rem;
  padding: 0 1.5rem 0 1.625rem;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  overflow: hidden;
  isolation: isolate;
  transition:
    background-color var(--t-base) var(--ease-out),
    transform var(--t-fast) var(--ease-out),
    box-shadow var(--t-base) var(--ease-out);
  box-shadow:
    0 1px 0 0 color-mix(in oklab, white 14%, transparent) inset,
    0 1px 2px color-mix(in oklab, var(--ink) 18%, transparent);
}
.btn__arrow {
  width: 1.25rem;
  height: 1.25rem;
  transition: transform var(--t-base) var(--ease-out);
}
@media (hover: hover) {
  .btn:hover { background: var(--accent-hover); }
  .btn:hover .btn__arrow { transform: translateX(4px); }
}
.btn:active { transform: scale(0.985); transition-duration: 80ms; }

/* ---------- 6. Email (copiar) ---------- */
.email {
  align-self: center;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;          /* target táctil 44px */
  padding: 0 0.5rem;
  font-size: 0.875rem;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
  transition: color var(--t-fast) var(--ease-out);
}
.email__text {
  position: relative;
  min-width: 10ch;
}
.email__text::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--t-base) var(--ease-out);
}
.email__icon { width: 1rem; height: 1rem; opacity: 0.6; transition: opacity var(--t-fast); }
@media (hover: hover) {
  .email:hover { color: var(--ink); }
  .email:hover .email__text::after { transform: scaleX(1); transform-origin: left; }
  .email:hover .email__icon { opacity: 1; }
}
.email:active { color: var(--accent); }

/* ---------- 7. Disparador del Subsuelo ---------- */
.surface__foot {
  display: flex;
  justify-content: center;
  border-top: 1px solid var(--line);
  padding-top: 0.75rem;
}
.disclose {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  min-height: 2.75rem;
  padding: 0 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  transition: color var(--t-fast) var(--ease-out);
}
@media (hover: hover) { .disclose:hover { color: var(--ink); } }
.disclose[aria-expanded="true"] { color: var(--ink); }

/* Icono + → × (dos líneas, rotación de 45°) */
.disclose__icon {
  position: relative;
  width: 10px;
  height: 10px;
  transition: transform var(--t-slow) var(--ease-in-out);
}
.disclose__icon::before,
.disclose__icon::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 1.25px;
  margin-top: -0.625px;
  background: currentColor;
}
.disclose__icon::after { transform: rotate(90deg); }
.disclose[aria-expanded="true"] .disclose__icon { transform: rotate(135deg); }

/* ---------- 8. El Subsuelo (acordeón grid 0fr → 1fr) ---------- */
.basement {
  display: grid;
  grid-template-rows: 0fr;
  background: var(--bg-deep);
  transition: grid-template-rows var(--t-slow) var(--ease-in-out);
}
.basement[data-open="true"] { grid-template-rows: 1fr; }
.basement__clip { overflow: hidden; min-height: 0; }

.basement__inner {
  max-width: 44rem;
  margin-inline: auto;
  padding:
    clamp(1.5rem, 6vw, 3rem)
    max(var(--gutter), env(safe-area-inset-right))
    max(2rem, env(safe-area-inset-bottom))
    max(var(--gutter), env(safe-area-inset-left));
  display: grid;
  gap: clamp(1.5rem, 5vw, 2.5rem);
  min-height: 100vh;
  min-height: 100dvh;
  grid-template-rows: auto auto 1fr;

  opacity: 0;
  transform: translateY(-12px);
  transition:
    opacity var(--t-base) var(--ease-out),
    transform var(--t-slow) var(--ease-out);
}
.basement[data-open="true"] .basement__inner {
  opacity: 1;
  transform: none;
  transition-delay: 120ms;
}

/* ---- Secciones del subsuelo (acordeón exclusivo) ---- */
.sections {
  display: grid;
  border-top: 1px solid var(--line);
}
.sec { border-bottom: 1px solid var(--line); }

.sec__head {
  width: 100%;
  display: grid;
  gap: 0.75rem;
  padding: 1.75rem 0 1.5rem;
  text-align: left;
}
.sec__label {
  display: flex;
  gap: 0.75rem;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.sec__n { color: var(--accent); font-variant-numeric: tabular-nums; }

.sec__summary {
  font-family: var(--serif);
  font-size: clamp(1.375rem, 5.4vw, 1.75rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
  max-width: 28ch;
}
.sec__summary strong { font-weight: 400; font-style: italic; color: var(--accent); }

.sec__more {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  transition: color var(--t-fast) var(--ease-out);
}
@media (hover: hover) { .sec__head:hover .sec__more { color: var(--ink); } }

/* chevron que rota 180° */
.sec__icon {
  width: 7px;
  height: 7px;
  border-right: 1.25px solid currentColor;
  border-bottom: 1.25px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform var(--t-slow) var(--ease-in-out);
}
.sec.is-open .sec__icon { transform: translateY(2px) rotate(225deg); }
.sec.is-open .sec__more { color: var(--accent); }

/* Panel: grid 0fr → 1fr */
.sec__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t-slow) var(--ease-in-out);
}
.sec.is-open .sec__panel { grid-template-rows: 1fr; }
.sec__clip { overflow: hidden; min-height: 0; }

.sec__body {
  padding-bottom: 2rem;
  display: grid;
  gap: 1rem;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 46ch;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity var(--t-base) var(--ease-out), transform var(--t-slow) var(--ease-out);
}
.sec.is-open .sec__body { opacity: 1; transform: none; transition-delay: 140ms; }
.sec__body em { font-style: normal; color: var(--ink); font-weight: 500; }

/* Pasos del método */
.steps { list-style: none; display: grid; margin-top: 0.5rem; }
.step {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 0.5rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}
.step__n {
  font-size: 0.75rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--accent);
  padding-top: 0.15rem;
}
.step__title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.step__text {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--ink-2);
}

/* Escalonado de entrada al abrir el subsuelo */
.sec, .basement__cta {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--t-base) var(--ease-out), transform var(--t-slow) var(--ease-out);
}
.basement[data-open="true"] :is(.sec, .basement__cta) { opacity: 1; transform: none; }
.basement[data-open="true"] .sec:nth-child(1) { transition-delay: 200ms; }
.basement[data-open="true"] .sec:nth-child(2) { transition-delay: 270ms; }
.basement[data-open="true"] .sec:nth-child(3) { transition-delay: 340ms; }
.basement[data-open="true"] .basement__cta    { transition-delay: 410ms; }

.basement__cta { display: grid; }

/* ---- "Nuestro método" abierto: versión compacta para que entre con el CTA en 1 pantalla ---- */
.sec--compact .sec__head { transition: padding var(--t-slow) var(--ease-in-out); }
.sec--compact.is-open .sec__head { padding: 1rem 0 0.75rem; gap: 0.5rem; }
.sec--compact .sec__body { gap: 0.5rem; padding-bottom: 0.75rem; }
.sec--compact .sec__body > p { font-size: 0.8125rem; line-height: 1.5; }
.sec--compact .steps { margin-top: 0.25rem; }
.sec--compact .step {
  grid-template-columns: 1.75rem 1fr;
  gap: 0.25rem;
  padding: 0.5rem 0;
}
.sec--compact .step__n { font-size: 0.6875rem; padding-top: 0.1rem; }
.sec--compact .step__title { font-size: 0.8125rem; }
.sec--compact .step__text { margin-top: 0.0625rem; font-size: 0.78125rem; line-height: 1.45; }

@media (max-height: 740px) {
  .sec--compact.is-open .sec__summary { font-size: 1.25rem; }
  .sec--compact .step__text { font-size: 0.75rem; line-height: 1.4; }
  .sec--compact .step { padding: 0.375rem 0; }
}

.foot {
  align-self: end;
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--ink-3);
}
.foot__top { text-decoration: none; transition: color var(--t-fast); }
@media (hover: hover) { .foot__top:hover { color: var(--ink); } }

/* ---------- 9. Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: max(1.5rem, calc(env(safe-area-inset-bottom) + 1rem));
  z-index: 200;
  padding: 0.625rem 1rem;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--bg);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.005em;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, 8px);
  transition: opacity var(--t-base) var(--ease-out), transform var(--t-base) var(--ease-out);
  box-shadow: 0 8px 24px -8px color-mix(in oklab, var(--ink) 40%, transparent);
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
.toast::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  margin-right: 0.5rem;
  border-radius: 50%;
  background: color-mix(in oklab, var(--accent) 60%, white);
  vertical-align: 0.1em;
}

/* ---------- 10. Entrada inicial escalonada ---------- */
.reveal {
  opacity: 0;
  transform: translateY(10px);
}
.is-ready .reveal {
  opacity: 1;
  transform: none;
  transition:
    opacity 700ms var(--ease-out),
    transform 900ms var(--ease-out);
  transition-delay: calc(var(--i, 0) * 70ms + 60ms);
}

/* ---------- 11. Breakpoints (progresivo) ---------- */
@media (min-width: 640px) {
  .actions {
    flex-direction: row;
    align-items: center;
    gap: 1.5rem;
  }
  .btn { min-width: 17rem; }
  .email { align-self: auto; }
  .surface__foot { justify-content: flex-start; }
  .disclose { padding-left: 0; }
  .basement__cta { justify-items: start; }
}

@media (max-height: 640px) and (max-width: 639px) {
  .lead { font-size: 0.875rem; margin-top: 0.875rem; }
  .tagline { margin-top: 0.75rem; }
}

/* ---------- 12. Accesibilidad de movimiento ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 1ms !important;
    transition-delay: 0ms !important;
    animation: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}