/* =========================================================
   BuhoTrading - index.css
   Estilos personalizados para la landing page (tema oscuro)
   ========================================================= */

/* ---------- Variables de color (paleta dark trading) ---------- */
:root {
    --bt-bg-deep: #0a0e17;          /* fondo más profundo */
    --bt-bg-dark: #0d1117;          /* fondo principal oscuro */
    --bt-bg-panel: #161b22;         /* paneles / tarjetas */
    --bt-border: #30363d;           /* bordes sutiles */
    --bt-text-primary: #e6edf3;     /* texto principal claro */
    --bt-text-muted: #8b949e;       /* texto secundario */
    --bt-accent: #3fb950;           /* verde "BUY" */
    --bt-danger: #f85149;           /* rojo "SELL" */
    --bt-gold: #d4a017;             /* dorado (acento BuhoTrading) */
    --bt-glow: rgba(63, 185, 80, 0.35); /* brillo verde sutil */
}

/* ---------- Reset / Base ---------- */
html, body {
    background-color: var(--bt-bg-dark);
    color: var(--bt-text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =========================================================
   NAVBAR (encabezado fijo)
   ========================================================= */
.bt-navbar {
    background-color: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--bt-border);
    padding: 0.6rem 0;
    z-index: 1030;
    transition: background-color 0.3s ease;
}

.bt-navbar .navbar-brand {
    color: var(--bt-text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bt-navbar .navbar-brand i {
    color: var(--bt-gold);
    font-size: 1.4rem;
}

.bt-navbar .navbar-brand:hover {
    color: var(--bt-text-primary);
}

.bt-navbar .navbar-nav .nav-link {
    color: var(--bt-text-muted);
    font-size: 0.92rem;
    font-weight: 500;
    padding: 0.5rem 0.9rem;
    transition: color 0.2s ease;
    position: relative;
}

.bt-navbar .navbar-nav .nav-link:hover {
    color: var(--bt-text-primary);
}

.bt-navbar .navbar-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0.3rem;
    width: 0;
    height: 2px;
    background-color: var(--bt-accent);
    transition: width 0.25s ease, left 0.25s ease;
}

.bt-navbar .navbar-nav .nav-link:hover::after {
    width: 60%;
    left: 20%;
}

/* Botón CTA dentro del navbar */
.bt-navbar .bt-btn-nav {
    background: linear-gradient(90deg, var(--bt-accent) 0%, #2ea043 100%);
    color: #ffffff;
    border: none;
    padding: 0.45rem 1.1rem;
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-left: 0.5rem;
    box-shadow: 0 2px 10px rgba(63, 185, 80, 0.2);
}

.bt-navbar .bt-btn-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(63, 185, 80, 0.35);
    color: #ffffff;
}

/* Botón hamburguesa (móvil) */
.bt-navbar .navbar-toggler {
    border: 1px solid var(--bt-border);
    padding: 0.35rem 0.55rem;
}

.bt-navbar .navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.15);
}

.bt-navbar .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(230, 237, 243, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* En móvil: que el menú colapsado tenga fondo oscuro sólido */
@media (max-width: 991.98px) {
    .bt-navbar .navbar-collapse {
        background-color: var(--bt-bg-panel);
        margin-top: 0.6rem;
        padding: 1rem;
        border-radius: 8px;
        border: 1px solid var(--bt-border);
    }

    .bt-navbar .bt-btn-nav {
        margin-left: 0;
        margin-top: 0.5rem;
        width: 100%;
        justify-content: center;
    }
}

/* =========================================================
   HERO SECTION
   ========================================================= */
.bt-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    color: var(--bt-text-primary);

    /* Fondo: degradado oscuro + (opcional) imagen de trading */
    background:
        linear-gradient(135deg, rgba(10, 14, 23, 0.92) 0%, rgba(13, 17, 23, 0.85) 50%, rgba(22, 27, 34, 0.92) 100%),
        url('../img/bg.png') center center / cover no-repeat,
        var(--bt-bg-deep);
}

/* Patrón sutil tipo "rejilla de gráfico" sobre el fondo */
.bt-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(63, 185, 80, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(63, 185, 80, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 1;
}

/* Glow radial decorativo */
.bt-hero::after {
    content: "";
    position: absolute;
    width: 800px;
    height: 800px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, var(--bt-glow) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
}

/* Contenedor del contenido del hero */
.bt-hero-content {
    position: relative;
    z-index: 2;
    padding: 2rem 1rem;
    max-width: 900px;
}

/* Título principal */
.bt-hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #ffffff 0%, var(--bt-gold) 50%, var(--bt-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 40px rgba(63, 185, 80, 0.15);
}

/* Slogan */
.bt-hero-slogan {
    font-size: clamp(1rem, 2vw, 1.4rem);
    font-weight: 300;
    color: var(--bt-text-muted);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

/* Resaltado dentro del slogan */
.bt-hero-slogan strong {
    color: var(--bt-text-primary);
    font-weight: 600;
}

/* =========================================================
   SECCIÓN: PARES SOPORTADOS (compacta)
   ========================================================= */
.bt-pairs {
    background-color: var(--bt-bg-deep);
    padding: 3rem 1rem;
    border-top: 1px solid var(--bt-border);
    border-bottom: 1px solid var(--bt-border);
}

.bt-pairs-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--bt-text-primary);
    margin-bottom: 0.5rem;
}

.bt-pairs-subtitle {
    text-align: center;
    color: var(--bt-text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

/* Tarjeta de cada categoría (Forex / Cripto) */
.bt-pairs-card {
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    height: 100%;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.bt-pairs-card:hover {
    border-color: var(--bt-accent);
    transform: translateY(-2px);
}

/* Encabezado de cada categoría */
.bt-pairs-category {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--bt-text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--bt-border);
}

.bt-pairs-category i {
    font-size: 1.3rem;
    color: var(--bt-gold);
}

.bt-pairs-card.crypto .bt-pairs-category i {
    color: var(--bt-accent);
}

/* Lista de pills */
.bt-pairs-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

/* Pill individual */
.bt-pair {
    display: inline-block;
    background-color: rgba(63, 185, 80, 0.08);
    color: var(--bt-text-primary);
    border: 1px solid var(--bt-border);
    border-radius: 6px;
    padding: 0.35rem 0.7rem;
    font-size: 0.82rem;
    font-family: 'Consolas', 'Courier New', monospace;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
    cursor: default;
}

.bt-pair:hover {
    background-color: rgba(63, 185, 80, 0.18);
    border-color: var(--bt-accent);
    color: var(--bt-accent);
}

/* Variante crypto: hover dorado */
.bt-pairs-card.crypto .bt-pair {
    background-color: rgba(212, 160, 23, 0.06);
}

.bt-pairs-card.crypto .bt-pair:hover {
    background-color: rgba(212, 160, 23, 0.18);
    border-color: var(--bt-gold);
    color: var(--bt-gold);
}

/* =========================================================
   SECCIÓN: ACCESO A LA API
   ========================================================= */
.bt-api {
    background-color: var(--bt-bg-dark);
    padding: 4rem 1rem;
}

.bt-api-title {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.5rem;
}

.bt-api-subtitle {
    text-align: center;
    color: var(--bt-text-muted);
    font-size: 1rem;
    margin-bottom: 2.5rem;
}

/* Caja de autorización (Bearer Token) */
.bt-auth-box {
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    border-left: 4px solid var(--bt-gold);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.bt-auth-box i {
    font-size: 1.5rem;
    color: var(--bt-gold);
}

.bt-auth-box-text {
    flex: 1;
    min-width: 200px;
}

.bt-auth-box-text strong {
    color: var(--bt-text-primary);
    display: block;
    margin-bottom: 0.2rem;
}

.bt-auth-box-text small {
    color: var(--bt-text-muted);
}

.bt-auth-box code {
    background-color: var(--bt-bg-deep);
    color: var(--bt-accent);
    padding: 0.4rem 0.7rem;
    border-radius: 6px;
    font-size: 0.85rem;
    border: 1px solid var(--bt-border);
}

/* Tarjeta de endpoint */
.bt-endpoint {
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: border-color 0.25s ease;
}

.bt-endpoint:hover {
    border-color: var(--bt-accent);
}

/* Encabezado del endpoint: método + ruta */
.bt-endpoint-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.bt-method {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    border-radius: 6px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.bt-method.get {
    background-color: rgba(63, 185, 80, 0.15);
    color: var(--bt-accent);
    border: 1px solid var(--bt-accent);
}

.bt-method.post {
    background-color: rgba(212, 160, 23, 0.15);
    color: var(--bt-gold);
    border: 1px solid var(--bt-gold);
}

.bt-endpoint-path {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 1.05rem;
    color: var(--bt-text-primary);
    font-weight: 600;
}

.bt-endpoint-tag {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--bt-text-muted);
    font-style: italic;
}

.bt-endpoint-desc {
    color: var(--bt-text-muted);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

/* Subtítulo dentro del endpoint (Parámetros, Request, Response) */
.bt-endpoint-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--bt-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    margin-top: 1rem;
}

/* Bloque de código */
.bt-code {
    background-color: var(--bt-bg-deep);
    border: 1px solid var(--bt-border);
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
    margin: 0;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--bt-text-primary);
}

.bt-code .bt-key      { color: #79c0ff; }   /* claves JSON: azul */
.bt-code .bt-string   { color: #a5d6ff; }   /* strings: celeste */
.bt-code .bt-number   { color: #d4a017; }   /* números: dorado */
.bt-code .bt-comment  { color: #6e7681; font-style: italic; } /* comentarios */
.bt-code .bt-method-c { color: var(--bt-accent); font-weight: 700; }

/* Aviso de velas fijas */
.bt-info-note {
    background-color: rgba(63, 185, 80, 0.06);
    border: 1px solid rgba(63, 185, 80, 0.3);
    border-radius: 8px;
    padding: 0.9rem 1.1rem;
    color: var(--bt-text-primary);
    font-size: 0.9rem;
    margin-top: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.bt-info-note i {
    color: var(--bt-accent);
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.bt-info-note code {
    background-color: var(--bt-bg-deep);
    color: var(--bt-gold);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Tabla de códigos de error */
.bt-errors-table {
    width: 100%;
    margin-top: 0.5rem;
    border-collapse: collapse;
    background-color: var(--bt-bg-deep);
    border-radius: 8px;
    overflow: hidden;
    font-size: 0.9rem;
}

.bt-errors-table thead {
    background-color: rgba(248, 81, 73, 0.08);
}

.bt-errors-table th {
    text-align: left;
    padding: 0.7rem 1rem;
    color: var(--bt-text-primary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--bt-border);
}

.bt-errors-table td {
    padding: 0.65rem 1rem;
    color: var(--bt-text-muted);
    border-bottom: 1px solid var(--bt-border);
    vertical-align: top;
}

.bt-errors-table tr:last-child td {
    border-bottom: none;
}

.bt-errors-table .bt-error-code {
    font-family: 'Consolas', 'Courier New', monospace;
    font-weight: 700;
    color: var(--bt-danger);
    white-space: nowrap;
}

.bt-errors-table .bt-error-code.success {
    color: var(--bt-accent);
}

.bt-errors-table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Tabla de campos (variante neutral, sin acento rojo) */
.bt-fields-table {
    width: 100%;
    margin-top: 0.5rem;
    border-collapse: collapse;
    background-color: var(--bt-bg-deep);
    border-radius: 8px;
    overflow: hidden;
    font-size: 0.88rem;
}

.bt-fields-table thead {
    background-color: rgba(212, 160, 23, 0.08);
}

.bt-fields-table th {
    text-align: left;
    padding: 0.6rem 1rem;
    color: var(--bt-text-primary);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--bt-border);
}

.bt-fields-table td {
    padding: 0.55rem 1rem;
    color: var(--bt-text-muted);
    border-bottom: 1px solid var(--bt-border);
    vertical-align: middle;
}

.bt-fields-table tr:last-child td {
    border-bottom: none;
}

.bt-fields-table .bt-field-index {
    font-family: 'Consolas', 'Courier New', monospace;
    font-weight: 700;
    color: var(--bt-gold);
    width: 70px;
    text-align: center;
}

.bt-fields-table .bt-field-name {
    font-family: 'Consolas', 'Courier New', monospace;
    color: var(--bt-text-primary);
    font-weight: 600;
    width: 130px;
}

.bt-fields-table tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* =========================================================
   SECCIÓN: FRAGMENT AI SIGNALS API
   ========================================================= */
.bt-fragment {
    background: linear-gradient(180deg, var(--bt-bg-dark) 0%, var(--bt-bg-deep) 50%, var(--bt-bg-dark) 100%);
    padding: 4rem 1rem;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--bt-border);
}

/* Glow decorativo de fondo */
.bt-fragment::before {
    content: "";
    position: absolute;
    width: 500px;
    height: 500px;
    top: 10%;
    right: -100px;
    background: radial-gradient(circle, rgba(125, 90, 220, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.bt-fragment::after {
    content: "";
    position: absolute;
    width: 400px;
    height: 400px;
    bottom: 10%;
    left: -100px;
    background: radial-gradient(circle, rgba(63, 185, 80, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.bt-fragment-container {
    position: relative;
    z-index: 2;
    max-width: 1000px;
    margin: 0 auto;
}

/* Badge "ADVANCED" */
.bt-fragment-badge {
    display: inline-block;
    background: linear-gradient(90deg, #7d5adc, #5b8def);
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    margin-bottom: 1rem;
}

.bt-fragment-title {
    text-align: center;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--bt-text-primary);
    margin-bottom: 0.6rem;
    letter-spacing: -0.5px;
}

.bt-fragment-title-accent {
    background: linear-gradient(90deg, #7d5adc 0%, #5b8def 50%, var(--bt-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bt-fragment-subtitle {
    text-align: center;
    color: var(--bt-text-muted);
    font-size: 1rem;
    max-width: 700px;
    margin: 0 auto 1rem auto;
    line-height: 1.7;
}

/* Caja comparativa /signal vs /fragmentSignal */
.bt-compare-box {
    background-color: rgba(22, 27, 34, 0.6);
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin: 2rem 0 2.5rem 0;
    backdrop-filter: blur(4px);
}

.bt-compare-row {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 0.6rem 0;
    border-bottom: 1px dashed var(--bt-border);
}

.bt-compare-row:last-child {
    border-bottom: none;
}

.bt-compare-tag {
    font-family: 'Consolas', 'Courier New', monospace;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    flex-shrink: 0;
    min-width: 140px;
    text-align: center;
}

.bt-compare-tag.full {
    background-color: rgba(63, 185, 80, 0.12);
    color: var(--bt-accent);
    border: 1px solid var(--bt-accent);
}

.bt-compare-tag.fragment {
    background-color: rgba(125, 90, 220, 0.15);
    color: #b48dff;
    border: 1px solid #7d5adc;
}

.bt-compare-text {
    color: var(--bt-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Grid de modelos de IA */
.bt-models-section-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bt-models-section-title i {
    color: #7d5adc;
}

.bt-models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
    margin-bottom: 2.5rem;
}

/* Card de modelo individual */
.bt-model-card {
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    padding: 1.5rem 1.25rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Línea de luz superior animada */
.bt-model-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--model-color, var(--bt-accent)), transparent);
    transition: left 0.6s ease;
}

.bt-model-card:hover {
    transform: translateY(-6px);
    border-color: var(--model-color, var(--bt-accent));
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 30px var(--model-glow, rgba(63, 185, 80, 0.15));
}

.bt-model-card:hover::before {
    left: 100%;
}

/* Asignación de color por modelo */
.bt-model-card.heatmap {
    --model-color: #f85149;
    --model-glow: rgba(248, 81, 73, 0.15);
}

.bt-model-card.bollingerbands {
    --model-color: #5b8def;
    --model-glow: rgba(91, 141, 239, 0.15);
}

.bt-model-card.rsiadx {
    --model-color: #d4a017;
    --model-glow: rgba(212, 160, 23, 0.15);
}

.bt-model-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--bt-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--model-color, var(--bt-accent));
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.bt-model-card:hover .bt-model-icon {
    transform: scale(1.1) rotate(-3deg);
    background-color: rgba(255, 255, 255, 0.05);
}

.bt-model-name {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.6rem;
    letter-spacing: 0.5px;
}

.bt-model-name::before {
    content: "model: ";
    color: var(--bt-text-muted);
    font-weight: 400;
    font-size: 0.85rem;
}

.bt-model-desc {
    color: var(--bt-text-muted);
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 0;
}

/* Subtitulo de subsección dentro del fragment */
.bt-fragment-subheading {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-top: 2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--bt-border);
}

.bt-fragment-subheading i {
    color: #7d5adc;
    font-size: 1.2rem;
}

/* Grid de timeframes */
.bt-timeframes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 0.8rem;
    margin: 0.8rem 0;
}

.bt-timeframe-item {
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    border-radius: 10px;
    padding: 1rem;
    text-align: center;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.bt-timeframe-item:hover {
    border-color: #7d5adc;
    transform: translateY(-3px);
}

.bt-timeframe-label {
    font-family: 'Consolas', 'Courier New', monospace;
    color: var(--bt-gold);
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.bt-timeframe-count {
    color: var(--bt-text-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0.2rem 0;
}

.bt-timeframe-unit {
    color: var(--bt-text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Tarjeta de advertencia/info especial */
.bt-fragment-warning {
    background: linear-gradient(135deg, rgba(125, 90, 220, 0.08) 0%, rgba(91, 141, 239, 0.05) 100%);
    border: 1px solid rgba(125, 90, 220, 0.3);
    border-left: 4px solid #7d5adc;
    border-radius: 10px;
    padding: 1.1rem 1.3rem;
    margin-top: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
}

.bt-fragment-warning i {
    font-size: 1.4rem;
    color: #b48dff;
    flex-shrink: 0;
    margin-top: 2px;
}

.bt-fragment-warning strong {
    color: var(--bt-text-primary);
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.95rem;
}

.bt-fragment-warning p {
    color: var(--bt-text-muted);
    font-size: 0.88rem;
    line-height: 1.6;
    margin: 0;
}

/* =========================================================
   SECCIÓN: OBTENER CLAVE DE ACCESO
   ========================================================= */
.bt-cta {
    background: linear-gradient(135deg, var(--bt-bg-deep) 0%, var(--bt-bg-panel) 100%);
    padding: 4rem 1rem;
    text-align: center;
    border-top: 1px solid var(--bt-border);
}

.bt-cta-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.5rem;
}

.bt-cta-text {
    color: var(--bt-text-muted);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto 2rem auto;
    line-height: 1.6;
}

.bt-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: linear-gradient(90deg, var(--bt-accent) 0%, #2ea043 100%);
    color: #ffffff;
    border: none;
    padding: 0.85rem 2rem;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 14px rgba(63, 185, 80, 0.25);
    text-decoration: none;
}

.bt-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(63, 185, 80, 0.4);
    color: #ffffff;
}

.bt-btn-primary:active {
    transform: translateY(0);
}

/* =========================================================
   MODAL DE OBTENER CLAVE
   ========================================================= */
.bt-modal .modal-content {
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    color: var(--bt-text-primary);
    border-radius: 12px;
}

.bt-modal .modal-header {
    border-bottom: 1px solid var(--bt-border);
    padding: 1rem 1.5rem;
}

.bt-modal .modal-title {
    font-weight: 700;
    color: var(--bt-text-primary);
}

.bt-modal .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
    opacity: 0.6;
}

.bt-modal .btn-close:hover {
    opacity: 1;
}

.bt-modal .modal-body {
    padding: 1.5rem;
}

.bt-modal .modal-footer {
    border-top: 1px solid var(--bt-border);
    padding: 1rem 1.5rem;
}

/* Inputs dentro del modal */
.bt-modal .form-label {
    color: var(--bt-text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.4rem;
}

.bt-modal .form-control {
    background-color: var(--bt-bg-deep);
    border: 1px solid var(--bt-border);
    color: var(--bt-text-primary);
    padding: 0.6rem 0.9rem;
    border-radius: 6px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.bt-modal .form-control:focus {
    background-color: var(--bt-bg-deep);
    border-color: var(--bt-accent);
    color: var(--bt-text-primary);
    box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.15);
}

.bt-modal .form-control::placeholder {
    color: #6e7681;
}

/* Caja de términos */
.bt-terms-box {
    background-color: var(--bt-bg-deep);
    border: 1px solid var(--bt-border);
    border-radius: 8px;
    padding: 1rem 1.1rem;
    max-height: 220px;
    overflow-y: auto;
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--bt-text-muted);
    margin-bottom: 1rem;
}

.bt-terms-box h6 {
    color: var(--bt-text-primary);
    font-size: 0.9rem;
    font-weight: 700;
    margin-top: 0.8rem;
    margin-bottom: 0.4rem;
}

.bt-terms-box h6:first-child {
    margin-top: 0;
}

.bt-terms-box p {
    margin-bottom: 0.6rem;
}

.bt-terms-box::-webkit-scrollbar {
    width: 8px;
}

.bt-terms-box::-webkit-scrollbar-track {
    background: var(--bt-bg-panel);
    border-radius: 4px;
}

.bt-terms-box::-webkit-scrollbar-thumb {
    background: var(--bt-border);
    border-radius: 4px;
}

.bt-terms-box::-webkit-scrollbar-thumb:hover {
    background: var(--bt-text-muted);
}

/* Checkbox */
.bt-modal .form-check-input {
    background-color: var(--bt-bg-deep);
    border: 1px solid var(--bt-border);
}

.bt-modal .form-check-input:checked {
    background-color: var(--bt-accent);
    border-color: var(--bt-accent);
}

.bt-modal .form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.15);
    border-color: var(--bt-accent);
}

.bt-modal .form-check-label {
    color: var(--bt-text-primary);
    font-size: 0.9rem;
}

/* =========================================================
   SECCIÓN: CONTACTO POR EMAIL
   ========================================================= */
.bt-contact {
    background-color: var(--bt-bg-dark);
    padding: 3rem 1rem;
    text-align: center;
    border-top: 1px solid var(--bt-border);
}

.bt-contact-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--bt-text-primary);
    margin-bottom: 0.5rem;
}

.bt-contact-text {
    color: var(--bt-text-muted);
    font-size: 0.95rem;
    max-width: 550px;
    margin: 0 auto 1.5rem auto;
    line-height: 1.6;
}

.bt-email-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background-color: var(--bt-bg-panel);
    color: var(--bt-text-primary);
    border: 1px solid var(--bt-border);
    padding: 0.7rem 1.4rem;
    border-radius: 8px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.25s ease;
}

.bt-email-link:hover {
    color: var(--bt-accent);
    border-color: var(--bt-accent);
    background-color: rgba(63, 185, 80, 0.05);
    transform: translateY(-2px);
}

.bt-email-link i {
    color: var(--bt-gold);
    font-size: 1.1rem;
}

.bt-email-link:hover i {
    color: var(--bt-accent);
}

/* =========================================================
   FOOTER
   ========================================================= */
.bt-footer {
    background-color: var(--bt-bg-deep);
    color: var(--bt-text-muted);
    padding: 3rem 1rem 1.5rem 1rem;
    border-top: 1px solid var(--bt-border);
    font-size: 0.9rem;
}

.bt-footer-brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.bt-footer-brand i {
    color: var(--bt-gold);
}

.bt-footer-tagline {
    color: var(--bt-text-muted);
    font-size: 0.85rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.bt-footer-heading {
    color: var(--bt-text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.bt-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.bt-footer-links li {
    margin-bottom: 0.5rem;
}

.bt-footer-links a {
    color: var(--bt-text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
    font-size: 0.88rem;
}

.bt-footer-links a:hover {
    color: var(--bt-accent);
}

/* Sección de contribución (discreta) */
.bt-footer-support {
    color: var(--bt-text-muted);
    font-size: 0.85rem;
    line-height: 1.6;
}

.bt-footer-support i {
    color: var(--bt-danger);
    margin-right: 0.3rem;
}

.bt-support-link {
    color: var(--bt-accent);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px dashed var(--bt-accent);
    transition: opacity 0.2s ease;
}

.bt-support-link:hover {
    color: var(--bt-accent);
    opacity: 0.8;
}

/* Línea divisoria del footer */
.bt-footer-divider {
    border: none;
    border-top: 1px solid var(--bt-border);
    margin: 2rem 0 1rem 0;
}

/* Parte inferior del footer */
.bt-footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.78rem;
    color: var(--bt-text-muted);
}

.bt-footer-bottom .bt-disclaimer {
    font-style: italic;
    opacity: 0.8;
}

/* Modal de contribución */
.bt-contrib-option {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.8rem 1rem;
    background-color: var(--bt-bg-deep);
    border: 1px solid var(--bt-border);
    border-radius: 8px;
    margin-bottom: 0.6rem;
    transition: all 0.2s ease;
}

.bt-contrib-option:hover {
    border-color: var(--bt-accent);
    transform: translateX(2px);
}

.bt-contrib-icon {
    font-size: 1.4rem;
    width: 32px;
    text-align: center;
    flex-shrink: 0;
}

.bt-contrib-icon.btc  { color: #f7931a; }
.bt-contrib-icon.eth  { color: #627eea; }
.bt-contrib-icon.usdt { color: #26a17b; }
.bt-contrib-icon.paypal { color: #003087; }
.bt-contrib-icon.coffee { color: #ffdd00; }

.bt-contrib-info {
    flex: 1;
    min-width: 0;
}

.bt-contrib-info strong {
    display: block;
    color: var(--bt-text-primary);
    font-size: 0.9rem;
    margin-bottom: 0.15rem;
}

.bt-contrib-info code {
    display: block;
    color: var(--bt-text-muted);
    font-size: 0.75rem;
    font-family: 'Consolas', 'Courier New', monospace;
    background: none;
    padding: 0;
    overflow-wrap: anywhere;
    word-break: break-all;
}

.bt-contrib-copy {
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    color: var(--bt-text-muted);
    padding: 0.35rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.bt-contrib-copy:hover {
    background-color: var(--bt-accent);
    color: #ffffff;
    border-color: var(--bt-accent);
}

/* =========================================================
   HOME PRESENTATIVA (index.html)
   ========================================================= */

/* Hero actions + eyebrow */
.bt-home-hero {
    max-width: 820px;
}

.bt-hero-eyebrow {
    display: inline-block;
    color: var(--bt-gold);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.bt-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 2rem;
}

.bt-btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.7rem 1.35rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--bt-text-primary);
    background: transparent;
    border: 1px solid var(--bt-border);
    text-decoration: none;
    transition: border-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.bt-btn-outline:hover {
    border-color: var(--bt-gold);
    color: var(--bt-gold);
    transform: translateY(-1px);
}

/* Fade-in suave del hero */
@keyframes btFadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bt-fade-in {
    animation: btFadeUp 0.7s ease both;
}

.bt-fade-delay-1 { animation-delay: 0.12s; }
.bt-fade-delay-2 { animation-delay: 0.24s; }
.bt-fade-delay-3 { animation-delay: 0.36s; }

/* Títulos de sección compartidos */
.bt-section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 2.5rem;
}

.bt-section-title {
    font-size: clamp(1.6rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.6rem;
}

.bt-section-title-left {
    text-align: left;
}

.bt-section-subtitle {
    color: var(--bt-text-muted);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

/* Pilares */
.bt-pillars {
    background-color: var(--bt-bg-deep);
    padding: 5rem 1rem;
    border-top: 1px solid var(--bt-border);
}

.bt-pillar {
    display: block;
    height: 100%;
    padding: 1.75rem 1.5rem;
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(22, 27, 34, 0.9) 0%, rgba(13, 17, 23, 0.95) 100%);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.bt-pillar:hover {
    border-color: var(--bt-accent);
    transform: translateY(-3px);
    color: inherit;
}

.bt-pillar-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(212, 160, 23, 0.12);
    color: var(--bt-gold);
    font-size: 1.35rem;
    margin-bottom: 1.1rem;
}

.bt-pillar-icon.signals {
    background: rgba(63, 185, 80, 0.12);
    color: var(--bt-accent);
}

.bt-pillar-icon.ai {
    background: rgba(88, 166, 255, 0.12);
    color: #58a6ff;
}

.bt-pillar-icon.java {
    background: rgba(248, 81, 73, 0.12);
    color: #f85149;
}

.bt-pillar-static {
    cursor: default;
}

.bt-pillar-static:hover {
    border-color: var(--bt-border);
    transform: none;
}

.bt-pillar-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.55rem;
    color: var(--bt-text-primary);
}

.bt-pillar-text {
    color: var(--bt-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.1rem;
}

.bt-pillar-link {
    color: var(--bt-accent);
    font-size: 0.88rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

/* Categorías MT5 */
.bt-solutions {
    background-color: var(--bt-bg-dark);
    padding: 5rem 1rem;
    border-top: 1px solid var(--bt-border);
}

.bt-cat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

@media (max-width: 991.98px) {
    .bt-cat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 575.98px) {
    .bt-cat-grid {
        grid-template-columns: 1fr;
    }
}

.bt-cat {
    padding: 1.4rem 1.25rem;
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    background-color: var(--bt-bg-panel);
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.bt-cat:hover {
    border-color: var(--bt-gold);
    transform: translateY(-2px);
}

.bt-cat-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.bt-cat-badge {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--bt-gold);
    background: rgba(212, 160, 23, 0.1);
    border: 1px solid rgba(212, 160, 23, 0.25);
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
}

.bt-cat-top i {
    color: var(--bt-text-muted);
    font-size: 1.2rem;
}

.bt-cat-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.5rem;
}

.bt-cat-text {
    color: var(--bt-text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
    margin: 0;
}

/* Productos publicados en MQL5 */
.bt-products {
    margin-top: 3.25rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--bt-border);
}

.bt-products-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 1.75rem;
}

.bt-products-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.45rem;
}

.bt-products-subtitle {
    color: var(--bt-text-muted);
    font-size: 0.95rem;
    line-height: 1.55;
    margin: 0;
}

.bt-product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

@media (max-width: 991.98px) {
    .bt-product-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }
}

.bt-product {
    display: flex;
    flex-direction: column;
    background-color: var(--bt-bg-panel);
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.bt-product:hover {
    border-color: var(--bt-gold);
    transform: translateY(-3px);
    color: inherit;
}

.bt-product-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background-color: var(--bt-bg-deep);
    overflow: hidden;
}

.bt-product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.bt-product-thumb .bt-cat-badge {
    position: absolute;
    top: 0.7rem;
    left: 0.7rem;
    backdrop-filter: blur(8px);
    background: rgba(13, 17, 23, 0.8);
}

.bt-product-body {
    padding: 1rem 1.1rem 1.15rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.bt-product-name {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: 0.45rem;
}

.bt-product-name img {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: 1px solid var(--bt-border);
}

.bt-product-text {
    color: var(--bt-text-muted);
    font-size: 0.88rem;
    line-height: 1.5;
    margin: 0 0 0.9rem;
    flex: 1;
}

.bt-product-cta {
    color: var(--bt-accent);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

/* Señales */
.bt-signals {
    background-color: var(--bt-bg-deep);
    padding: 5rem 1rem;
    border-top: 1px solid var(--bt-border);
}

.bt-signals-lead {
    color: var(--bt-text-muted);
    font-size: 1.05rem;
    line-height: 1.65;
    margin: 0.75rem 0 1.5rem;
}

.bt-signals-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.75rem;
}

.bt-signals-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    color: var(--bt-text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.7rem;
}

.bt-signals-list i {
    color: var(--bt-accent);
    margin-top: 0.15rem;
    flex-shrink: 0;
}

.bt-signals-panel {
    border: 1px solid var(--bt-border);
    border-radius: 12px;
    background:
        linear-gradient(135deg, rgba(63, 185, 80, 0.06) 0%, transparent 45%),
        var(--bt-bg-panel);
    padding: 1.5rem;
}

.bt-signals-panel-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--bt-border);
}

.bt-signals-panel-row:last-of-type {
    border-bottom: none;
}

.bt-signals-label {
    color: var(--bt-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

.bt-signals-value {
    color: var(--bt-text-primary);
    font-size: 0.92rem;
    font-weight: 600;
}

.bt-signals-note {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--bt-border);
    color: var(--bt-text-muted);
    font-size: 0.8rem;
    line-height: 1.5;
    display: flex;
    gap: 0.45rem;
    align-items: flex-start;
}

.bt-signals-note i {
    color: var(--bt-gold);
    margin-top: 0.1rem;
}

@media (prefers-reduced-motion: reduce) {
    .bt-fade-in {
        animation: none;
    }
}