/* ═══════════════════════════════════════════════════════════
   Piensa Estoico — estilos (diseño minimalista / editorial)
   ═══════════════════════════════════════════════════════════ */

:root {
  --paper: #FBF9F5;
  --paper-2: #F3EFE7;
  --ink: #1C1A16;
  --muted: #6E675C;
  --hairline: #E5DFD3;
  --accent: #8F7046;

  --dark: #171512;
  --dark-text: #F3EFE7;
  --dark-muted: #A8A196;
  --dark-hairline: rgba(243, 239, 231, 0.16);

  --ok: #3E7A52;
  --err: #A63D2B;

  --serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--accent); color: var(--paper); }

/* Accesibilidad */
.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;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Contenedor */
.container {
  width: min(100% - 2.5rem, 68rem);
  margin-inline: auto;
}

/* ══════════ Cabecera ══════════ */
.site-header {
  border-bottom: 1px solid var(--hairline);
  background: rgba(251, 249, 245, 0.85);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
}

.wordmark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: 0.14em;
  text-decoration: none;
  white-space: nowrap;
}

.wordmark-dot { color: var(--accent); }

/* Logo (imagen) */
.logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.logo {
  display: block;
  height: 48px;
  width: auto;
}

.site-footer .logo { height: 32px; }

.nav-tag {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ══════════ Secciones ══════════ */
section { padding-block: clamp(4rem, 9vw, 6.5rem); }

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
}

h1, h2, h3 { font-family: var(--serif); font-weight: 600; margin: 0; }

h1 {
  font-size: clamp(2.5rem, 6.5vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

h1 em {
  font-style: italic;
  color: var(--accent);
}

h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  line-height: 1.2;
}

/* ══════════ Hero ══════════ */
.hero {
  padding-block: clamp(4.5rem, 11vw, 8rem) clamp(3.5rem, 8vw, 6rem);
  text-align: center;
}

.lede {
  max-width: 40rem;
  margin: 0 auto 2.25rem;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
}

/* ══════════ Formularios ══════════ */
.signup-form {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  max-width: 34rem;
  margin-inline: auto;
}

.signup-form input[type="email"] {
  flex: 1 1 15rem;
  min-width: 0;
  padding: 0.85rem 1.1rem;
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid #CFC8B8;
  border-radius: 3px;
}

.signup-form input::placeholder { color: #A59C8C; }

.signup-form button {
  flex: 0 0 auto;
  padding: 0.85rem 1.6rem;
  font: inherit;
  font-weight: 500;
  color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

.signup-form button:hover { background: var(--accent); border-color: var(--accent); }
.signup-form button:active { transform: translateY(1px); }
.signup-form button:disabled { opacity: 0.6; cursor: wait; }

.form-msg {
  display: none;
  flex-basis: 100%;
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  text-align: center;
}

.form-msg.shown { display: block; }
.form-msg.is-ok { color: var(--ok); }
.form-msg.is-err { color: var(--err); }

.form-note {
  margin: 1.1rem auto 0;
  max-width: 30rem;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ══════════ Cita ══════════ */
.quote-band {
  background: var(--paper-2);
  border-block: 1px solid var(--hairline);
  text-align: center;
}

.quote-band blockquote {
  margin: 0 auto;
  max-width: 44rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  font-weight: 500;
  line-height: 1.45;
}

.quote-band cite {
  display: block;
  margin-top: 1.25rem;
  font-family: var(--sans);
  font-style: normal;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ══════════ Beneficios ══════════ */
.benefits h2 {
  margin-bottom: 3rem;
}

.benefit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .benefit-list { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
}

.benefit-list li {
  border-top: 1px solid var(--hairline);
  padding-top: 1.4rem;
}

.num {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--accent);
}

.benefit-list h3 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
}

.benefit-list p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* ══════════ CTA final (banda oscura) ══════════ */
.final-cta {
  background: var(--dark);
  color: var(--dark-text);
  text-align: center;
}

.final-cta .eyebrow { color: #C6A878; }

.final-cta .cta-text {
  max-width: 32rem;
  margin: 1.25rem auto 2.25rem;
  color: var(--dark-muted);
}

.final-cta .signup-form--dark input[type="email"] {
  background: transparent;
  color: var(--dark-text);
  border-color: var(--dark-hairline);
}

.final-cta .signup-form--dark input::placeholder { color: var(--dark-muted); }

.final-cta .signup-form--dark button {
  color: var(--dark);
  background: var(--dark-text);
  border-color: var(--dark-text);
}

.final-cta .signup-form--dark button:hover {
  background: #C6A878;
  border-color: #C6A878;
  color: var(--dark);
}

.final-cta .form-msg.is-ok { color: #A8D0B4; }
.final-cta .form-msg.is-err { color: #E58B7A; }

/* ══════════ Pie ══════════ */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding-block: 2.25rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
}

.footer-inner .wordmark { font-size: 1rem; }

.footer-nav {
  display: flex;
  gap: 1.5rem;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
}

.footer-nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

.copyright {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

/* Responsivo: ajustes finos en móvil */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav-tag { display: none; }
  .footer-inner { flex-direction: column; text-align: center; }
}