/* ==========================================================================
   Twynum — main.css
   Mobile first. Breakpoints: 480 / 768 / 1024 / 1280
   ========================================================================== */

:root {
  /* Colores */
  --bg-main:      #2f2f31;
  --bg-card:      #1e1e20;
  --accent-gold:  #B2A37D;
  --accent-hover: #9A8B65;
  --text-white:   #ffffff;
  --text-cream:   #EBE6DC;
  --text-muted:   #B3B8B6;
  --accent-red:   #E05A47;
  --accent-green: #5ca380;
  --border:       rgba(179,184,182,0.1);

  /* Tipografía */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;

  /* Espaciado */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;

  /* Layout */
  --container-max: 1200px;
  --radius: 12px;
  --radius-sm: 8px;

  --shadow-card: 0 8px 24px rgba(0,0,0,0.25);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { list-style: none; margin: 0; padding: 0; }
img, picture, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-main);
  background: var(--bg-main);
  color: var(--text-cream);
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  font-variant-ligatures: none;
}

h1, h2, h3 {
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.2;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.15rem; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

section[id] { scroll-margin-top: 80px; }

.section-sub {
  color: var(--text-muted);
  max-width: 640px;
  margin-top: var(--space-2);
}

/* Focus visible */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-gold);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-gold);
  color: var(--bg-main);
  padding: var(--space-1) var(--space-2);
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease, transform .1s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--accent-gold);
  color: var(--bg-main);
}
.btn--primary:hover { background: var(--accent-hover); }

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-cream);
}
.btn--ghost:hover { border-color: var(--accent-gold); color: var(--accent-gold); }

.btn--sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn--lg { padding: 0.9rem 1.75rem; font-size: 1rem; }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(47,47,49,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-2);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-white);
  letter-spacing: -0.02em;
}
.logo__icon {
}

.nav__list {
  display: flex;
  gap: var(--space-4);
}
.nav__list a {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color .15s ease;
}
.nav__list a:hover { color: var(--text-white); }

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.lang-switch__btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  color: var(--text-muted);
}
.lang-switch__btn[aria-current="true"] {
  color: var(--accent-gold);
}
.lang-switch__btn:hover { color: var(--text-white); }

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text-white);
  border-radius: 2px;
}

@media (max-width: 767px) {
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height .2s ease;
  }
  .nav.is-open { max-height: 300px; }
  .nav__list {
    flex-direction: column;
    padding: var(--space-3);
    gap: var(--space-2);
  }
  .header__actions .btn--sm { display: none; }
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding-block: var(--space-6) var(--space-7);
}
.hero__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.eyebrow {
  color: var(--accent-gold);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  margin-bottom: var(--space-2);
}
.hero__sub {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-top: var(--space-2);
  max-width: 560px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.hero__visual { display: flex; justify-content: center; }
.hero__card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
  position: relative;
}
.hero__illustration {
  width: 100%;
  height: auto;
  display: block;
}

@media (min-width: 1024px) {
  .hero__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .hero__content { flex: 1 1 55%; }
  .hero__visual { flex: 1 1 40%; }
}

/* ==========================================================================
   Features
   ========================================================================== */
.features { padding-block: var(--space-6); }
.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
}
.feature-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(178,163,125,0.12);
  color: var(--accent-gold);
  margin-bottom: var(--space-3);
}
.feature-card__icon svg { width: 22px; height: 22px; }
.feature-card h3 { margin-bottom: var(--space-1); }
.feature-card p { color: var(--text-muted); font-size: 0.95rem; }

@media (min-width: 480px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .features__grid { grid-template-columns: repeat(3, 1fr); }
}

/* ==========================================================================
   How it works
   ========================================================================== */
.how { padding-block: var(--space-6); background: var(--bg-card); }
.how__steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.step__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-gold);
  color: var(--bg-main);
  font-weight: 800;
  margin-bottom: var(--space-2);
}
.step h3 { margin-bottom: var(--space-1); }
.step p { color: var(--text-muted); font-size: 0.95rem; }

@media (min-width: 480px) {
  .how__steps { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .how__steps { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   Beta program
   ========================================================================== */
.beta { padding-block: var(--space-6); text-align: center; }
.beta .section-sub { margin-inline: auto; }

.lead-form {
  max-width: 640px;
  margin: var(--space-5) auto 0;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
@media (min-width: 768px) {
  .form-row { grid-template-columns: 1fr 1fr; }
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.form-field label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-cream);
}
.form-field input {
  background: var(--bg-main);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  color: var(--text-white);
}
.form-field input:focus-visible { border-color: var(--accent-gold); }
.form-field input:invalid[aria-invalid="true"] { border-color: var(--accent-red); }

.consent-field {
  display: flex;
  align-items: flex-start;
  gap: var(--space-1);
  font-size: 0.875rem;
  color: var(--text-muted);
}
.consent-field a {
  color: var(--accent-gold);
  text-decoration: underline;
}

.required-mark {
  color: var(--accent-gold);
}
.required-note {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: calc(var(--space-1) * -1);
}

.form-message {
  font-size: 0.9rem;
  min-height: 1.2em;
}
.form-message[data-state="success"] { color: var(--accent-green); }
.form-message[data-state="error"] { color: var(--accent-red); }

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer { padding-block: var(--space-5); border-top: 1px solid var(--border); background: var(--bg-card); }
.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__brand p { color: var(--text-muted); font-size: 0.9rem; margin-top: var(--space-1); }
.footer__email { display: inline-block; color: var(--text-muted); font-size: 0.9rem; margin-top: var(--space-1); }
.footer__email:hover { color: var(--accent-gold); }
.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.footer__nav a { color: var(--text-muted); font-size: 0.9rem; }
.footer__nav a:hover { color: var(--accent-gold); }
.footer__legal { color: var(--text-muted); font-size: 0.8rem; }

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }
}

/* ==========================================================================
   Legal pages
   ========================================================================== */
.legal { padding-block: var(--space-6); }
.legal__inner { max-width: 760px; }
.legal__back {
  display: inline-block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-4);
}
.legal__back:hover { color: var(--accent-gold); }
.legal__updated {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: var(--space-1);
  margin-bottom: var(--space-5);
}
.legal h2 { font-size: 1.3rem; margin-top: var(--space-5); margin-bottom: var(--space-2); }
.legal h3 { font-size: 1.05rem; margin-top: var(--space-4); margin-bottom: var(--space-1); }
.legal p { color: var(--text-cream); margin-bottom: var(--space-2); }
.legal a { color: var(--accent-gold); text-decoration: underline; }
.legal ul { list-style: disc; padding-left: 1.25rem; margin-bottom: var(--space-2); }
.legal ul li { margin-bottom: var(--space-1); color: var(--text-cream); }
.legal table { width: 100%; border-collapse: collapse; margin-bottom: var(--space-3); font-size: 0.9rem; }
.legal th, .legal td { border: 1px solid var(--border); padding: var(--space-1) var(--space-2); text-align: left; color: var(--text-cream); }
.legal th { color: var(--text-white); background: var(--bg-card); }
.legal__notice {
  background: rgba(224,90,71,0.1);
  border: 1px solid var(--accent-red);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  color: var(--text-cream);
  margin-bottom: var(--space-5);
  font-size: 0.9rem;
}
.legal__notice strong { color: var(--accent-red); }

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-1);
}
.footer__legal-links a { color: var(--text-muted); font-size: 0.8rem; }
.footer__legal-links a:hover { color: var(--accent-gold); }

/* ==========================================================================
   Cookie banner
   ========================================================================== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: var(--shadow-card);
}
.cookie-banner[hidden] {
  display: none;
}
.cookie-banner p { font-size: 0.9rem; color: var(--text-muted); }
.cookie-banner p a { color: var(--accent-gold); text-decoration: underline; margin-left: 4px; }
.cookie-banner__actions {
  display: flex;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .cookie-banner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
  }
}