/* ============================================================
   RUNAVLA — Estilos
   Paleta: negro profundo / hueso / oro apagado
   Tipografía: Cormorant Garamond (display) + Inter (cuerpo)
   ============================================================ */

/* ── Reset & base ─────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg:        #0c0b09;
  --color-surface:   #131210;
  --color-border:    #2a2720;
  --color-text:      #e8e0d0;
  --color-muted:     #7a7060;
  --color-gold:      #b89a5a;
  --color-gold-dim:  #7a6538;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --max-width: 1080px;
  --section-gap: 7rem;
  --radius: 2px;

  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a  { color: inherit; text-decoration: none; }

/* Accesibilidad — solo visible para lectores de pantalla */
.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;
}

/* ── Tipografía utilitaria ────────────────────────────────── */
.eyebrow {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 1rem;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.15;
}

h1 { font-size: clamp(3rem, 7vw, 5.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }

em {
  font-style: italic;
  color: var(--color-gold);
}

.lead {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 46ch;
  line-height: 1.8;
}

/* ── Botones ──────────────────────────────────────────────── */
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.button:hover,
.button:focus-visible {
  background: var(--color-gold);
  color: var(--color-bg);
  outline: none;
}

.button--ghost {
  border-color: var(--color-border);
  color: var(--color-muted);
}

.button--ghost:hover,
.button--ghost:focus-visible {
  border-color: var(--color-gold);
  background: transparent;
  color: var(--color-gold);
}

.button--small {
  padding: 0.55rem 1.2rem;
  font-size: 0.65rem;
}

/* ── Header / Nav ─────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.5rem 2.5rem;
  display: flex;
  align-items: center;
  transition: background var(--transition), padding var(--transition),
              border-bottom var(--transition);
}

.site-header.scrolled {
  background: rgba(12, 11, 9, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem 2.5rem;
  border-bottom: 1px solid var(--color-border);
}

.nav {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--color-text);
  transition: color var(--transition);
}

.brand-mark:hover { color: var(--color-gold); }

.nav__links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav__links a {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a:focus-visible {
  color: var(--color-text);
  outline: none;
}

/* Hamburguesa — visible solo en móvil */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

/* Estado abierto */
.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10rem 2.5rem 5rem;
  overflow: hidden;
}

/* Símbolo rúnico decorativo de fondo */
.hero__symbol {
  position: absolute;
  right: 6%;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(14rem, 28vw, 26rem);
  color: transparent;
  -webkit-text-stroke: 1px var(--color-border);
  pointer-events: none;
  user-select: none;
  line-height: 1;
  opacity: 0.6;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  width: 100%;
}

.hero__content h1 {
  margin: 0.5rem 0 1.5rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.5rem;
}

/* Edición / lote */
.hero__edition {
  position: absolute;
  bottom: 2.5rem;
  right: 2.5rem;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-muted);
  text-align: right;
  line-height: 1.7;
}

.hero__edition strong {
  display: block;
  color: var(--color-gold-dim);
  font-weight: 400;
  margin-bottom: 0.25rem;
}

/* Línea separadora decorativa abajo del hero */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 4rem;
  background: linear-gradient(to bottom, var(--color-border), transparent);
}

/* ── Secciones genéricas ──────────────────────────────────── */
.section {
  padding: var(--section-gap) 2.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__header {
  margin-bottom: 4rem;
}

.section__header h2 {
  margin-top: 0.3rem;
}

.section__lead {
  margin-top: 1rem;
  color: var(--color-muted);
  max-width: 52ch;
}

/* Divisor horizontal entre secciones */
.section + .section {
  border-top: 1px solid var(--color-border);
}

/* ── Colecciones ──────────────────────────────────────────── */
.colecciones { }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1px;
  border: 1px solid var(--color-border);
}

.piece-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2rem 1.75rem;
  border: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  transition: background var(--transition);
}

.piece-card:last-child { border-right: 0; }

.piece-card:hover {
  background: #1a1814;
}

.piece-card__symbol {
  font-size: 2.8rem;
  color: var(--color-gold-dim);
  line-height: 1;
}

.piece-card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.piece-card__tag {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.piece-card__body h3 {
  font-size: 1.25rem;
  font-weight: 300;
}

.piece-card__body p {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.7;
}

.piece-card__edition {
  display: block;
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-border);
  margin-top: 0.5rem;
}

/* ── El Método ────────────────────────────────────────────── */
.metodo {
  background: var(--color-surface);
  max-width: 100%;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.metodo > .section__header,
.metodo > .metodo__steps {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.metodo__steps {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 200px;
}

.step__number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: 1rem;
}

.step h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.step p {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.8;
}

.step__divider {
  color: var(--color-border);
  font-size: 1.5rem;
  padding-top: 1rem;
  align-self: flex-start;
  flex-shrink: 0;
}

/* ── Círculo ──────────────────────────────────────────────── */
.circulo {
  text-align: center;
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

.circulo__inner {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.circulo__symbol {
  font-size: 4rem;
  color: var(--color-gold-dim);
  margin-bottom: 0.5rem;
  opacity: 0.7;
}

.circulo__inner h2 {
  margin-top: 0.25rem;
}

.circulo__inner .section__lead {
  text-align: center;
  margin: 0 auto;
}

.circulo__form {
  display: flex;
  gap: 0;
  margin-top: 1.5rem;
  width: 100%;
  max-width: 420px;
}

.circulo__form input {
  flex: 1;
  padding: 0.75rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-right: 0;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 300;
  outline: none;
  transition: border-color var(--transition);
}

.circulo__form input::placeholder {
  color: var(--color-muted);
}

.circulo__form input:focus {
  border-color: var(--color-gold-dim);
}

.circulo__form .button {
  flex-shrink: 0;
  white-space: nowrap;
}

.circulo__note {
  font-size: 0.7rem;
  color: var(--color-muted);
  letter-spacing: 0.05em;
  margin-top: 0.5rem;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 2.5rem;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer__inner .brand-mark {
  font-size: 1rem;
  letter-spacing: 0.3em;
}

.footer__nav {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer__nav a {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
  transition: color var(--transition);
}

.footer__nav a:hover { color: var(--color-text); }

.footer__copy {
  font-size: 0.65rem;
  color: var(--color-border);
  letter-spacing: 0.08em;
}

/* ── Animaciones de entrada ───────────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  :root { --section-gap: 5rem; }

  .site-header { padding: 1.25rem 1.5rem; }
  .site-header.scrolled { padding: 0.85rem 1.5rem; }

  /* Menú móvil */
  .nav__toggle { display: flex; }

  .nav__links {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 99;
  }

  .nav__links.open { display: flex; }

  .nav__links a {
    font-size: 1rem;
    letter-spacing: 0.25em;
  }

  .hero {
    padding: 8rem 1.5rem 5rem;
    justify-content: flex-start;
  }

  .hero__symbol {
    right: -5%;
    font-size: 55vw;
    opacity: 0.25;
  }

  .hero__edition {
    position: static;
    margin-top: 3rem;
    text-align: left;
  }

  .section { padding: var(--section-gap) 1.5rem; }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .piece-card { border-right: 0; border-bottom: 1px solid var(--color-border); }
  .piece-card:last-child { border-bottom: 0; }

  .metodo { padding-left: 1.5rem; padding-right: 1.5rem; }

  .metodo__steps {
    flex-direction: column;
    gap: 3rem;
  }

  .step__divider { display: none; }

  .circulo__form {
    flex-direction: column;
  }

  .circulo__form input { border-right: 1px solid var(--color-border); border-bottom: 0; }

  .footer__inner { gap: 1rem; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .button { width: 100%; justify-content: center; }
}

/* ── Estados JS ───────────────────────────────────────────── */

/* Link activo en nav */
.nav__links a.active {
  color: var(--color-text);
}

/* Shake de error en input del formulario */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-6px); }
  40%       { transform: translateX(6px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}

.input--error {
  animation: shake 0.4s ease;
  border-color: #8b3a3a !important;
}

/* Mensaje de confirmación del Círculo */
.circulo__confirm {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--color-gold);
  letter-spacing: 0.05em;
  text-align: center;
  padding: 1rem 0;
}