/* =========================================================
   INVERTIR EN BITCOIN O ESCLAVITUD - LANDING PAGE
   Estilo editorial / económico / histórico / moderno
   ========================================================= */

   :root {
    --color-primary: #1c2b3a;      /* azul tinta / editorial */
    --color-secondary: #8a6d3b;    /* dorado envejecido */
    --color-background: #f7f4ee;   /* papel crema */
    --color-text: #2a2a28;
    --color-accent: #b3892f;       /* acento dorado */
    --color-white: #ffffff;
    --color-border: #ddd6c7;

    --font-title: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', Arial, sans-serif;

    --max-width: 1140px;
    --radius: 6px;
    --transition: 0.3s ease;
}

/* ===== RESET BASICO ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

a { text-decoration: none; color: inherit; }

ul { list-style: none; }

h1, h2, h3 { font-family: var(--font-title); color: var(--color-primary); line-height: 1.25; }

/* ===== BOTONES ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    transition: transform var(--transition), background-color var(--transition), box-shadow var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.btn:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

/* ===== HEADER ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
}

.logo {
    font-family: var(--font-title);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.main-nav {
    display: flex;
    gap: 32px;
}

.main-nav a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-primary);
    transition: color var(--transition);
    padding: 6px 0;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a:focus {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: transform var(--transition), opacity var(--transition);
}

/* ===== HERO ===== */
.hero {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 80px 0;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.eyebrow, .section-eyebrow {
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 12px;
    display: block;
}

.hero h1 {
    font-size: 2.4rem;
    color: var(--color-white);
    margin-bottom: 12px;
}

.hero-subtitle {
    font-family: var(--font-title);
    font-size: 1.1rem;
    font-style: italic;
    color: #d8cba9;
    margin-bottom: 28px;
}

.hero-question {
    font-size: 1.5rem;
    color: var(--color-white);
    margin-bottom: 16px;
}

.hero-text-secondary {
    color: #cfd6dd;
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-image img {
    border-radius: var(--radius);
    box-shadow: 0 20px 50px rgba(0,0,0,0.35);
    max-width: 320px;
    margin: 0 auto;
}

/* ===== SECCIONES GENERALES ===== */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 16px;
}

.section-lead {
    max-width: 720px;
    color: #4a4a45;
    margin-bottom: 40px;
    font-size: 1.05rem;
}

/* ===== BLOQUES DE CONTENIDO ===== */
.content-blocks {
    background-color: var(--color-white);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 28px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(0,0,0,0.08);
}

.card-number {
    display: inline-block;
    font-family: var(--font-title);
    font-size: 1.4rem;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.card p {
    font-size: 0.95rem;
    color: #4a4a45;
}

/* ===== VIAJE / TIMELINE ===== */
.journey {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.journey .section-title,
.journey .section-eyebrow {
    color: var(--color-white);
}
.journey .section-eyebrow { color: var(--color-accent); }

.timeline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 48px;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: rgba(255,255,255,0.25);
}

.timeline-item {
    position: relative;
    text-align: center;
    flex: 1;
}

.timeline-dot {
    display: block;
    width: 16px;
    height: 16px;
    background-color: var(--color-accent);
    border-radius: 50%;
    margin: 0 auto 12px;
    position: relative;
    z-index: 1;
}

.timeline-label {
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: #d8cba9;
}

/* ===== PREGUNTAS ===== */
.questions {
    background-color: var(--color-white);
}

.questions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.question-item {
    background-color: var(--color-background);
    border-left: 4px solid var(--color-accent);
    padding: 18px 22px;
    font-family: var(--font-title);
    font-size: 1.05rem;
    color: var(--color-primary);
}

/* ===== BITCOIN NO ES SOLO EL PRECIO ===== */
.price-concept {
    background-color: var(--color-secondary);
    color: var(--color-white);
    text-align: center;
}

.price-concept .section-title { color: var(--color-white); }

.price-concept-inner {
    max-width: 720px;
}

.price-concept-text {
    font-size: 1.15rem;
    font-family: var(--font-title);
    font-style: italic;
}

/* ===== PRACTICA / ESTAFAS ===== */
.practical {
    background-color: var(--color-background);
}

.practical-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 24px;
}

.practical-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 26px;
}

.practical-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--color-secondary);
}

.practical-card p {
    font-size: 0.95rem;
    color: #4a4a45;
}

/* ===== AUDIENCIA ===== */
.audience {
    background-color: var(--color-white);
    text-align: center;
}

.audience-inner {
    max-width: 720px;
}

.audience-text {
    color: #4a4a45;
    margin-top: 8px;
}

/* ===== PRODUCTO ===== */
.product {
    background-color: var(--color-background);
}

.product-card {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 40px;
    align-items: center;
}

.product-image img {
    border-radius: var(--radius);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.product-info h3 {
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.product-type {
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: 20px;
}

.product-features {
    margin-bottom: 24px;
}

.product-features li {
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
    color: #4a4a45;
}

.product-features li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

.product-price {
    font-family: var(--font-title);
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.product-disclaimer {
    margin-top: 20px;
    font-size: 0.85rem;
    color: #7a7a72;
}

/* ===== CTA FINAL ===== */
.final-cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    text-align: center;
}

.final-cta .section-title { color: var(--color-white); }

.final-cta-inner {
    max-width: 700px;
    margin: 0 auto;
}

.final-cta-text {
    margin-bottom: 32px;
    color: #cfd6dd;
}

/* ===== FOOTER ===== */
.site-footer {
    background-color: #101821;
    color: #9fa8b3;
    text-align: center;
    padding: 32px 0;
    font-size: 0.85rem;
}

.footer-note {
    margin-top: 6px;
    color: #7c8590;
}

/* ===== BOTON VOLVER ARRIBA ===== */
#back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-accent);
    color: var(--color-white);
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
    z-index: 90;
}

#back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

#back-to-top:hover {
    transform: translateY(-3px);
}

/* ===== FADE IN (JS controlado) ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-text-secondary { margin-left: auto; margin-right: auto; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
    .practical-grid { grid-template-columns: 1fr; }
    .questions-grid { grid-template-columns: 1fr; }
    .product-card { grid-template-columns: 1fr; text-align: center; }
    .product-image img { margin: 0 auto; max-width: 260px; }
}

@media (max-width: 700px) {
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        gap: 0;
        border-bottom: 1px solid var(--color-border);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition);
    }
    .main-nav.open { max-height: 300px; }
    .main-nav a { padding: 16px 24px; width: 100%; border-bottom: 1px solid var(--color-border); }
    .nav-toggle { display: flex; }

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

    .timeline {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }
    .timeline::before {
        top: 0;
        bottom: 0;
        left: 8px;
        right: auto;
        width: 2px;
        height: auto;
    }
    .timeline-item {
        display: flex;
        align-items: center;
        gap: 16px;
        text-align: left;
    }
    .timeline-dot { margin: 0; }

    .hero h1 { font-size: 1.8rem; }
    .hero-question { font-size: 1.2rem; }
    section { padding: 56px 0; }
    .section-title { font-size: 1.6rem; }
}