/* Estilos compartidos de las páginas públicas del blog de TradingZen */

:root {
    --gold: #D4AF37;
    --gold-lt: #F4D03F;
    --gold-dim: rgba(212,175,55,0.10);
    --gold-bdr: rgba(212,175,55,0.25);
    --gold-bdr2: rgba(212,175,55,0.55);
    --bg: #000000;
    --bg2: #0d0d0d;
    --card: #1A1A1A;
    --text: #F5F5F5;
    --text-mid: rgba(245,245,245,0.65);
    --text-low: rgba(245,245,245,0.4);
    --radius: 10px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    color: var(--text);
    line-height: 1.25;
}

a { color: var(--gold-lt); text-decoration: none; }
a:hover { color: var(--text); }

.blog-header {
    padding: 14px 0;
    border-bottom: 1px solid var(--gold-bdr);
    background: rgba(0,0,0,0.94);
    backdrop-filter: blur(14px);
}
.blog-header-inner {
    width: 92%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}
.blog-header .logo-img { height: 40px; width: auto; display: block; }
.blog-header .nav-links {
    display: flex;
    gap: 26px;
    list-style: none;
}
.blog-header .nav-links a {
    color: var(--text-mid);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.02em;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
    transition: color .2s, border-color .2s;
}
.blog-header .nav-links a:hover,
.blog-header .nav-links a.activo {
    color: var(--gold);
    border-bottom-color: var(--gold);
}
.blog-header .header-btns { display: flex; gap: 10px; }
.blog-header .btn-ghost {
    padding: 8px 18px; border-radius: 6px;
    border: 1px solid var(--gold-bdr2);
    color: var(--gold); font-size: 13px; font-weight: 600;
    text-decoration: none; transition: all .2s; letter-spacing: 0.04em;
}
.blog-header .btn-ghost:hover { background: var(--gold-dim); }
.blog-header .btn-gold {
    padding: 8px 20px; border-radius: 6px;
    background: linear-gradient(135deg, var(--gold), var(--gold-lt));
    color: #000; font-size: 13px; font-weight: 700;
    text-decoration: none; transition: opacity .2s; letter-spacing: 0.04em;
}
.blog-header .btn-gold:hover { opacity: .85; }

@media (max-width: 780px) {
    .blog-header .nav-links { display: none; }
}
@media (max-width: 480px) {
    .blog-header .btn-ghost { display: none; }
}

.blog-container {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}

.blog-categoria {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .5px;
    text-transform: uppercase;
    color: var(--gold-lt);
    background: var(--gold-dim);
    border: 1px solid var(--gold-bdr);
    border-radius: 20px;
    padding: 4px 14px;
    margin-bottom: 16px;
}

.blog-titulo {
    font-size: 32px;
    margin-bottom: 24px;
}

.blog-video {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* proporción 16:9 */
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 32px;
    background: var(--card);
    border: 1px solid var(--gold-bdr);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.blog-video iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: 0;
}
.blog-video {
    background-size: cover;
    background-position: center;
    cursor: pointer;
}
.blog-video-play {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 72px; height: 72px;
    border-radius: 50%;
    background: rgba(0,0,0,0.55);
    border: 2px solid var(--gold-bdr2);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: background .2s, transform .2s;
}
.blog-video-play:hover {
    background: rgba(0,0,0,0.75);
    transform: translate(-50%, -50%) scale(1.06);
}
.blog-video-play-icon {
    width: 0; height: 0;
    border-top: 14px solid transparent;
    border-bottom: 14px solid transparent;
    border-left: 22px solid var(--gold-lt);
    margin-left: 5px; /* centra ópticamente el triángulo */
}

.blog-contenido {
    font-size: 16px;
    color: var(--text-mid);
}
.blog-contenido p { margin-bottom: 18px; }

.blog-volver {
    display: inline-block;
    font-size: 13px;
    color: var(--text-low);
    margin-bottom: 24px;
}
.blog-volver:hover { color: var(--gold-lt); }

.blog-lectura {
    display: inline-block;
    font-size: 12px;
    color: var(--text-low);
    margin-bottom: 16px;
    margin-left: 10px;
}

.blog-cta {
    text-align: center;
    margin-top: 40px;
    padding: 32px;
    background: var(--card);
    border: 1px solid var(--gold-bdr);
    border-radius: var(--radius);
}
.blog-cta p { color: var(--text-mid); margin-bottom: 16px; }
.blog-cta a.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold), var(--gold-lt));
    color: #000;
    font-weight: 700;
    padding: 14px 32px;
    border-radius: 8px;
}
.blog-cta a.btn:hover { opacity: .9; color: #000; }

.blog-footer {
    text-align: center;
    padding: 24px;
    font-size: 12px;
    color: var(--text-low);
    border-top: 1px solid var(--gold-bdr);
}

.blog-404 {
    text-align: center;
    padding: 120px 24px;
}

/* Listado del blog */
.blog-hero {
    text-align: center;
    padding: 56px 24px 16px;
}
.blog-hero h1 { font-size: 36px; }
.blog-hero p {
    color: var(--text-mid);
    margin-top: 12px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.blog-stats {
    padding: 32px 0;
    border-top: 1px solid var(--gold-bdr);
    border-bottom: 1px solid var(--gold-bdr);
    background: var(--bg2);
}
.blog-stats-grid {
    width: 90%;
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    text-align: center;
}
.blog-stat-item { position: relative; }
.blog-stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0; top: 15%; bottom: 15%;
    width: 1px;
    background: var(--gold-bdr);
}
.blog-stat-num {
    font-family: 'Playfair Display', serif;
    font-size: 34px;
    font-weight: 700;
    color: var(--gold-lt);
    line-height: 1;
    margin-bottom: 6px;
}
.blog-stat-label {
    font-size: 11px;
    color: var(--text-low);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
@media (max-width: 640px) {
    .blog-stats-grid { grid-template-columns: 1fr; gap: 20px; }
    .blog-stat-item:not(:last-child)::after { display: none; }
}

.blog-filtros {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    padding: 24px;
}
.blog-filtro {
    font-size: 13px;
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--gold-bdr);
    color: var(--text-mid);
}
.blog-filtro:hover { color: var(--gold-lt); }
.blog-filtro.activo {
    background: var(--gold-dim);
    color: var(--gold-lt);
    border-color: var(--gold-bdr2);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px 60px;
}

.blog-card {
    background: var(--card);
    border: 1px solid var(--gold-bdr);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: border-color .15s;
}
.blog-card:hover { border-color: var(--gold-bdr2); }
.blog-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
.blog-card-body { padding: 18px 20px; flex: 1; display: flex; flex-direction: column; }
.blog-card-body h2 { font-size: 18px; margin: 10px 0 8px; }
.blog-card-body p { font-size: 14px; color: var(--text-mid); flex: 1; }
.blog-card-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.blog-card-meta .blog-categoria { margin-bottom: 0; }
.blog-card-meta .blog-lectura { margin: 0; }

.blog-vacio {
    text-align: center;
    padding: 80px 24px;
    color: var(--text-mid);
}

.blog-relacionados {
    margin-top: 56px;
    padding-top: 40px;
    border-top: 1px solid var(--gold-bdr);
}
.blog-relacionados h3 {
    font-size: 22px;
    margin-bottom: 20px;
}
.blog-relacionados-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}
.blog-relacionados .blog-card-body h2 { font-size: 15px; margin-top: 8px; }