/* ============================================================================
   SEIKÔ CORP — Design System "Exótico Elegante Disruptivo"
   ============================================================================
   Tokens, glass morphism, animaciones, patrón oriental, accesibilidad
   Mobile-first · 375 / 768 / 1024 / 1440
   ============================================================================ */

:root {
  /* === PALETA BASE === */
  --color-bg:          #0A0908;
  --color-bg-alt:      #1C1917;
  --color-bg-texture:  #0F0E0C;

  /* === DORADOS === */
  --color-gold:        #A16207;
  --color-gold-bright: #D4A574;
  --color-gold-deep:   #7C4A03;

  /* === TEXTOS === */
  --color-text:        #FAFAF9;
  --color-text-muted:  #A8A29E;
  --color-text-dim:    #57534E;

  /* === BORDES Y GLOWS === */
  --color-border:      rgba(212, 165, 116, 0.18);
  --color-border-hi:   rgba(212, 165, 116, 0.40);
  --color-glow:        rgba(212, 165, 116, 0.35);

  /* === TIPOGRAFÍA === */
  --ff-display: "Noto Serif JP", "Cormorant Garamond", serif;
  --ff-heading: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --ff-body:    "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --ff-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --ff-deco:    "Poiret One", "Cormorant Garamond", serif;

  /* === ESCALAS === */
  --fs-xs:   0.72rem;
  --fs-sm:   0.86rem;
  --fs-base: 1rem;
  --fs-md:   1.15rem;
  --fs-lg:   1.35rem;
  --fs-xl:   1.85rem;
  --fs-2xl:  2.4rem;
  --fs-3xl:  3.4rem;

  /* === ESPACIADO (8pt scale) === */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  24px;
  --sp-6:  32px;
  --sp-7:  48px;
  --sp-8:  64px;
  --sp-9:  96px;
  --sp-10: 128px;
  --sp-11: 160px;

  /* === RADIOS === */
  --r-sm: 2px;
  --r-md: 4px;
  --r-lg: 8px;

  /* === SOMBRAS === */
  --sh-low:  0 4px 16px rgba(0, 0, 0, 0.35);
  --sh-mid:  0 8px 32px rgba(0, 0, 0, 0.45);
  --sh-high: 0 20px 60px rgba(0, 0, 0, 0.6);
  --sh-glow: 0 0 40px rgba(212, 165, 116, 0.18);

  /* === TRANSICIONES === */
  --t-fast:  180ms cubic-bezier(0.16, 1, 0.3, 1);
  --t-base:  320ms cubic-bezier(0.16, 1, 0.3, 1);
  --t-slow:  520ms cubic-bezier(0.16, 1, 0.3, 1);

  /* === PATRÓN ORIENTAL (SVG seigaiha inline) === */
  --pattern-seigaiha:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='80' height='46' viewBox='0 0 80 46'><g fill='none' stroke='%23D4A574' stroke-width='0.8' opacity='0.04'><path d='M0 23 a20 20 0 0 1 40 0'/><path d='M40 23 a20 20 0 0 1 40 0'/><path d='M-20 46 a20 20 0 0 1 40 0'/><path d='M20 46 a20 20 0 0 1 40 0'/><path d='M60 46 a20 20 0 0 1 40 0'/><path d='M-40 0 a20 20 0 0 1 40 0'/><path d='M0 0 a20 20 0 0 1 40 0'/><path d='M40 0 a20 20 0 0 1 40 0'/></g></svg>");

  --pad-x: clamp(20px, 5vw, 80px);
  --pad-y: clamp(80px, 12vh, 160px);
}

/* ============================================================================
   BACKGROUND CON TEXTURA ORIENTAL
   ============================================================================ */

body {
  background-color: var(--color-bg);
  background-image: var(--pattern-seigaiha);
  background-repeat: repeat;
  background-size: 80px 46px;
  background-attachment: fixed;
  background-position: 0 0;
}

/* ============================================================================
   HUB INTRO
   ============================================================================ */

.hub-intro {
  text-align: center;
  padding: clamp(64px, 12vh, 120px) var(--pad-x);
  position: relative;
}
.hub-intro__title {
  font-family: var(--ff-display);
  font-size: clamp(1.6rem, 3.8vw, 2.8rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--color-text);
  line-height: 1.35;
  max-width: 820px;
  margin: 0 auto 24px;
}
.hub-intro__title em {
  font-style: italic;
  color: var(--color-gold-bright);
  font-family: var(--ff-heading);
}
.hub-intro__sub {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.hub-intro__rule {
  width: 80px;
  height: 1px;
  margin: 40px auto 0;
  background: linear-gradient(90deg, transparent, var(--color-gold-bright), transparent);
}

/* ============================================================================
   HUB · GRID DE 5 PUERTAS (glass morphism)
   ============================================================================ */

.puertas-section {
  padding: var(--pad-y) var(--pad-x);
  position: relative;
}

.puertas-eyebrow {
  text-align: center;
  margin-bottom: clamp(48px, 8vh, 96px);
}
.puertas-eyebrow .eyebrow {
  display: inline-flex;
  justify-content: center;
  align-items: center;
}
.puertas-eyebrow h2 {
  font-family: var(--ff-heading);
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  font-weight: 300;
  color: var(--color-text);
  margin-top: 24px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.15;
}

.puertas-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  max-width: 1480px;
  margin: 0 auto;
}

@media (max-width: 1280px) {
  .puertas-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 860px) {
  .puertas-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
}
@media (max-width: 480px) {
  .puertas-grid { grid-template-columns: 1fr; gap: 16px; }
}

/* === Card base glass morphism === */
.puerta-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  text-decoration: none;
  background: rgba(28, 25, 23, 0.55);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--color-border);
  border-radius: var(--r-md);
  box-shadow:
    var(--sh-mid),
    inset 0 1px 0 rgba(212, 165, 116, 0.08);
  padding: 36px 28px 32px;
  min-height: 380px;
  color: var(--color-text);
  overflow: hidden;
  isolation: isolate;
  transition:
    transform var(--t-base),
    background var(--t-base),
    border-color var(--t-base),
    box-shadow var(--t-base);
  cursor: pointer;
}
.puerta-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold-bright), transparent);
  opacity: 0.5;
  transition: opacity var(--t-base);
  z-index: 1;
}
.puerta-card:focus-visible {
  outline: 2px solid var(--color-gold-bright);
  outline-offset: 4px;
}
.puerta-card:hover,
.puerta-card:focus-visible {
  background: rgba(28, 25, 23, 0.72);
  border-color: var(--color-border-hi);
  transform: translateY(-6px) scale(1.01);
  box-shadow:
    var(--sh-high),
    0 0 40px rgba(212, 165, 116, 0.18),
    inset 0 1px 0 rgba(212, 165, 116, 0.22);
}
.puerta-card:hover::before,
.puerta-card:focus-visible::before {
  opacity: 1;
}

.puerta-card__num {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.32em;
  color: var(--color-gold-bright);
  text-transform: uppercase;
  margin-bottom: 28px;
}
.puerta-card__icon {
  width: 44px;
  height: 44px;
  margin-bottom: 24px;
  stroke: var(--color-gold-bright);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--t-base);
}
.puerta-card:hover .puerta-card__icon {
  transform: scale(1.08);
}
.puerta-card__title {
  font-family: var(--ff-display);
  font-size: clamp(1.35rem, 2.2vw, 1.7rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: 14px;
  line-height: 1.2;
}
.puerta-card__tagline {
  font-family: var(--ff-heading);
  font-style: italic;
  font-size: var(--fs-md);
  color: var(--color-gold-bright);
  margin-bottom: 18px;
  line-height: 1.35;
  font-weight: 300;
}
.puerta-card__desc {
  font-family: var(--ff-body);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: auto;
}
.puerta-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-gold-bright);
  border-bottom: 1px solid transparent;
  padding-bottom: 4px;
  transition: border-color var(--t-base), color var(--t-base);
}
.puerta-card:hover .puerta-card__cta {
  border-bottom-color: var(--color-gold-bright);
}
.puerta-card__cta::after {
  content: "→";
  display: inline-block;
  transition: transform var(--t-base);
}
.puerta-card:hover .puerta-card__cta::after {
  transform: translateX(4px);
}

/* ============================================================================
   BTN-GLASS · CTAs auxiliares
   ============================================================================ */

.btn-glass {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: rgba(161, 98, 7, 0.15);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-hi);
  color: var(--color-gold-bright);
  font-family: var(--ff-display);
  font-size: var(--fs-xs);
  font-weight: 300;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--r-sm);
  transition:
    background var(--t-base),
    border-color var(--t-base),
    box-shadow var(--t-base),
    text-shadow var(--t-base);
  cursor: pointer;
}
.btn-glass:hover,
.btn-glass:focus-visible {
  background: rgba(212, 165, 116, 0.12);
  border-color: rgba(212, 165, 116, 0.8);
  box-shadow: 0 0 30px rgba(212, 165, 116, 0.3);
  text-shadow: 0 0 12px rgba(212, 165, 116, 0.5);
  outline: none;
}

/* ============================================================================
   BASE METODOLÓGICA · ACORDEÓN
   ============================================================================ */

.base-metodologica {
  padding: var(--pad-y) var(--pad-x);
  background: var(--color-bg-alt);
  position: relative;
}
.base-metodologica .eyebrow {
  margin-bottom: 28px;
}
.base-metodologica h2 {
  font-family: var(--ff-heading);
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  font-weight: 300;
  color: var(--color-text);
  margin-bottom: 64px;
  max-width: 720px;
  line-height: 1.2;
}
.acordeon {
  max-width: 1080px;
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
}
.acordeon-item {
  border-bottom: 1px solid var(--color-border);
}
.acordeon-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 8px;
  background: transparent;
  border: 0;
  color: var(--color-text);
  font-family: var(--ff-display);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  text-align: left;
  cursor: pointer;
  transition: color var(--t-base);
}
.acordeon-trigger:hover { color: var(--color-gold-bright); }
.acordeon-trigger:focus-visible {
  outline: 2px solid var(--color-gold-bright);
  outline-offset: 4px;
}
.acordeon-trigger__num {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.32em;
  color: var(--color-gold-bright);
  margin-right: 20px;
}
.acordeon-trigger__icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gold-bright);
  transition: transform var(--t-base);
}
.acordeon-item.is-open .acordeon-trigger__icon {
  transform: rotate(45deg);
}
.acordeon-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-slow);
}
.acordeon-item.is-open .acordeon-content {
  max-height: 1600px;
}
.acordeon-content__inner {
  padding: 0 8px 36px;
  font-family: var(--ff-body);
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--color-text-muted);
  max-width: 760px;
}

/* === Bloques internos de los acordeones === */
.metodo-mic-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-top: 24px;
}
@media (max-width: 860px) { .metodo-mic-steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .metodo-mic-steps { grid-template-columns: 1fr; } }
.metodo-mic-step {
  border-left: 1px solid var(--color-border);
  padding: 8px 14px;
}
.metodo-mic-step__num {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.24em;
  color: var(--color-gold-bright);
  display: block;
  margin-bottom: 8px;
}
.metodo-mic-step h5 {
  font-family: var(--ff-heading);
  font-size: var(--fs-md);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 6px;
}
.metodo-mic-step p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

.guias-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}
@media (max-width: 760px) { .guias-list { grid-template-columns: 1fr; } }
.guia-item {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}
.guia-item__glyph {
  font-family: var(--ff-display);
  font-size: 1.5rem;
  color: var(--color-gold-bright);
  margin-bottom: 12px;
}
.guia-item h5 {
  font-family: var(--ff-heading);
  font-size: var(--fs-md);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 4px;
}
.guia-item .epithet {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-gold-bright);
  margin-bottom: 12px;
}
.guia-item p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 12px;
}
.guia-item .freq {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.28em;
  color: var(--color-gold-bright);
}

/* ============================================================================
   VISIÓN 2035 — PLAN 20/5/100
   ============================================================================ */

.vision-2035 {
  padding: var(--pad-y) var(--pad-x);
  background: var(--color-bg);
  text-align: center;
  position: relative;
}
.vision-2035 .eyebrow {
  justify-content: center;
}
.vision-2035 h2 {
  font-family: var(--ff-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 300;
  color: var(--color-text);
  margin: 24px auto 0;
  max-width: 820px;
  line-height: 1.15;
  letter-spacing: 0.04em;
}
.vision-2035 .plan-numbers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin: 80px auto;
  max-width: 980px;
}
@media (max-width: 760px) { .vision-2035 .plan-numbers { grid-template-columns: 1fr; gap: 56px; } }
.plan-num {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.plan-num .big {
  font-family: var(--ff-display);
  font-size: clamp(4.5rem, 12vw, 9rem);
  font-weight: 200;
  color: var(--color-gold-bright);
  letter-spacing: -0.02em;
  line-height: 1;
  text-shadow: 0 0 30px rgba(212, 165, 116, 0.25);
}
.plan-num .label {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.32em;
  color: var(--color-text);
  text-transform: uppercase;
  margin-top: 16px;
}
.vision-2035 .plan-text {
  max-width: 760px;
  margin: 0 auto;
  font-family: var(--ff-heading);
  font-style: italic;
  font-size: var(--fs-lg);
  line-height: 1.55;
  color: var(--color-text-muted);
  font-weight: 300;
}

/* ============================================================================
   NAV — actualización mínima para soportar 5 items
   ============================================================================ */

.nav ul li a[href="#hub"] {
  color: var(--color-gold-bright);
  opacity: 1;
}

/* ============================================================================
   UTILIDADES
   ============================================================================ */

.reveal-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 800ms ease, transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-fade.in {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================================
   REDUCED MOTION
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .puerta-card,
  .btn-glass,
  .acordeon-trigger,
  .acordeon-content,
  .plan-num .big,
  .reveal-fade {
    transition: none !important;
  }
  .puerta-card:hover {
    transform: none;
  }
  .reveal-fade {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================================
   FOCUS STATES (accesibilidad — WCAG 2.1)
   ============================================================================ */

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-gold-bright);
  outline-offset: 4px;
  border-radius: var(--r-sm);
}

/* Skip-link para teclado */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-gold-bright);
  color: var(--color-bg);
  padding: 12px 18px;
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  z-index: 10000;
  transition: top var(--t-base);
}
.skip-link:focus {
  top: 0;
}