/* estilos explorar */

/* hero variante contenida de la página */
.hero-explorar {
    padding-block: var(--sp-20) var(--sp-12);
}

.hero-explorar .hero-title {
    max-width: 24ch;
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    line-height: 1.08;
}

.hero-explorar .hero-subtitle {
    max-width: 60ch;
    font-size: 1.1rem;
}

/* toc índice superior con números navegables */
.explorar-toc {
    position: sticky;
    top: var(--nav-h);
    z-index: var(--z-sticky);
    background: linear-gradient(180deg, var(--bg-deep), rgba(15, 15, 35, 0.95));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-block: 1px solid var(--border-subtle);
    padding-block: var(--sp-3);
}

.explorar-toc-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.explorar-toc-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-3) var(--sp-4);
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition:
        color var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out),
        background var(--dur-fast) var(--ease-out),
        transform var(--dur-fast) var(--ease-out);
}

.explorar-toc-link:hover,
.explorar-toc-link:focus-visible {
    color: var(--text-primary);
    border-color: var(--border-red);
    background: rgba(255, 70, 85, 0.05);
    transform: translateY(-1px);
}

.explorar-toc-link.is-active {
    color: var(--text-primary);
    border-color: var(--red-primary);
    background: rgba(255, 70, 85, 0.1);
    box-shadow: inset 0 0 0 1px var(--border-red);
}

.explorar-toc-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 2px 6px;
    background: rgba(255, 70, 85, 0.15);
    color: var(--red-glow);
    border-radius: var(--radius-xs);
    letter-spacing: 0.08em;
}

.explorar-toc-link.is-active .explorar-toc-num {
    background: var(--red-primary);
    color: var(--text-primary);
}

.explorar-toc-label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* tool section una sección por herramienta */
.tool-section {
    position: relative;
    padding-block: var(--sp-16);
    border-top: 1px solid var(--border-subtle);
    overflow: hidden;
    scroll-margin-top: calc(var(--nav-h) + 64px);
    transition:
        background var(--dur-slow) var(--ease-out),
        box-shadow var(--dur-slow) var(--ease-out);
}

.tool-section:first-of-type {
    border-top: none;
}

/* fondos alternos entre secciones */
.tool-section:nth-of-type(even) {
    background: linear-gradient(180deg, var(--bg-deep), var(--bg-dark));
}

/* glow ambiental sutil detrás de cada sección */
.tool-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 0%, rgba(255, 70, 85, 0.04), transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.tool-section > .container {
    position: relative;
    z-index: 1;
}

/* resaltado breve al navegar a sección */
.tool-section.is-highlighted {
    background:
        linear-gradient(180deg, rgba(255, 70, 85, 0.06), transparent 60%),
        var(--bg-deep);
    box-shadow: inset 4px 0 0 var(--red-primary);
    animation: tool-pulse 1.8s var(--ease-out);
}

@keyframes tool-pulse {
    0%   { box-shadow: inset 4px 0 0 var(--red-primary), 0 0 0 0 rgba(255, 70, 85, 0.25); }
    40%  { box-shadow: inset 4px 0 0 var(--red-primary), 0 0 40px 0 rgba(255, 70, 85, 0.18); }
    100% { box-shadow: inset 4px 0 0 var(--red-primary), 0 0 0 0 rgba(255, 70, 85, 0); }
}

/* cabecera de sección número grande + título */
.tool-section-header {
    display: flex;
    align-items: flex-start;
    gap: var(--sp-6);
    margin-bottom: var(--sp-10);
}

.tool-section-number {
    flex-shrink: 0;
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 700;
    line-height: 0.9;
    letter-spacing: 0.02em;

    /* número outline estilo hud */
    color: transparent;
    -webkit-text-stroke: 1.5px var(--red-primary);
    background: linear-gradient(
        135deg,
        rgba(255, 70, 85, 0.15) 0%,
        rgba(255, 70, 85, 0.02) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
}

.tool-section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: 0.01em;
    color: var(--text-primary);
    margin-top: var(--sp-2);
    margin-bottom: var(--sp-2);
}

.tool-section-subtitle {
    max-width: 64ch;
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* grid de dos columnas de contenido */
.tool-section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-10);
    margin-bottom: var(--sp-10);
}

.tool-section-col {
    position: relative;
    padding: var(--sp-6);
    background: linear-gradient(160deg, var(--bg-medium), var(--bg-dark));
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color var(--dur-med) var(--ease-out);
}

/* acento superior con gradiente */
.tool-section-col::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--red-primary), transparent);
    opacity: 0.5;
    transition: opacity var(--dur-med) var(--ease-out);
}

.tool-section-col:hover {
    border-color: var(--border-red);
}

.tool-section-col:hover::before {
    opacity: 1;
}

.tool-col-title {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--sp-5);
    padding-bottom: var(--sp-3);
    border-bottom: 1px dashed var(--border-default);
}

/* listas de bullets y pasos */
.tool-bullets {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
}

.tool-bullets li {
    position: relative;
    padding-left: var(--sp-6);
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.tool-bullets li::before {
    content: "▹";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--red-primary);
    font-family: var(--font-mono);
    font-weight: 600;
}

.tool-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
    counter-reset: tool-step;
}

.tool-steps li {
    display: flex;
    align-items: flex-start;
    gap: var(--sp-4);
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.tool-step-num {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 70, 85, 0.1);
    border: 1px solid var(--border-red);
    border-radius: var(--radius-xs);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--red-glow);
    letter-spacing: 0.04em;
}

.tool-step-text {
    padding-top: var(--sp-1);
}

/* footer de cada sección */
.tool-section-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-5);
    padding: var(--sp-5) var(--sp-6);
    background: var(--bg-glass);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
}

.tool-access-note {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-3);
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.tool-access-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(0, 224, 255, 0.1);
    border: 1px solid var(--border-cyan);
    border-radius: var(--radius-xs);
    color: var(--cyan-accent);
    font-size: 0.95rem;
}

/* estado bloqueado en tono rojo */
.tool-access-note.tool-locked {
    color: var(--text-primary);
    font-weight: 500;
}

.tool-access-note.tool-locked .tool-access-icon {
    background: rgba(255, 70, 85, 0.12);
    border-color: var(--border-red);
    color: var(--red-glow);
}

/* grupo de botones del footer */
.tool-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-3);
}

/* responsive mobile first a partir de px */
@media (max-width: 900px) {
    /* toc en dos columnas sin sticky */
    .explorar-toc {
        position: static;
    }
    .explorar-toc-list {
        grid-template-columns: repeat(2, 1fr);
    }

    /* header de sección apilado */
    .tool-section-header {
        flex-direction: column;
        gap: var(--sp-4);
    }
    .tool-section-number {
        font-size: 3.5rem;
    }

    /* grid a una columna */
    .tool-section-grid {
        grid-template-columns: 1fr;
        gap: var(--sp-5);
    }

    /* footer apilado */
    .tool-section-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    .tool-actions {
        width: 100%;
    }
    .tool-actions .btn-primary,
    .tool-actions .btn-ghost {
        flex: 1;
    }
}

@media (max-width: 540px) {
    .hero-explorar {
        padding-block: var(--sp-12) var(--sp-8);
    }

    .explorar-toc-list {
        grid-template-columns: 1fr;
    }

    .tool-section {
        padding-block: var(--sp-10);
    }

    .tool-col-title {
        font-size: 0.75rem;
    }
}