/* =============================================================================
   SINGLE CASE STUDY — single-case-studies.php
   Design System: dark (#111827) + lime (#beea07) + Bricolage Grotesque
   Prefix: csd-
   ============================================================================= */


/* =============================================================================
   0. WRAPPER
   ============================================================================= */

.csd-page {
    background: var(--color-secondary);
    min-height: 100vh;
    color: var(--color-white);
}


/* =============================================================================
   1. HERO
   ============================================================================= */

.csd-hero {
    position: relative;
    padding: calc(var(--header-height) + var(--space-20)) 0 var(--space-20);
    background: var(--color-secondary);
    overflow: hidden;
}

.csd-hero--has-image {
    min-height: 72vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding-bottom: var(--space-24);
}

/* Background image */
.csd-hero__image-wrap {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.csd-hero__bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0.30;
}

.csd-hero__image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(17, 24, 39, 0.25) 0%,
        rgba(17, 24, 39, 0.55) 45%,
        rgba(17, 24, 39, 0.97) 100%
    );
}

.csd-hero .container {
    position: relative;
    z-index: 1;
}

.csd-hero__content {
    max-width: 860px;
}

/* Logo del cliente */
.csd-hero__logo {
    margin-bottom: var(--space-6);
}

.csd-hero__logo-img {
    display: block;
    max-height: 48px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    opacity: 0.9;
}


/* Meta row (chips) */
.csd-hero__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.csd-hero__industry,
.csd-hero__client,
.csd-hero__date,
.csd-hero__proj-count {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-radius: var(--border-radius-sm);
    padding: var(--space-1) var(--space-3);
}

.csd-hero__industry {
    color: var(--color-black);
    background: var(--color-primary);
}

.csd-hero__client {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.csd-hero__date {
    color: var(--color-gray-400);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-gray-700);
}

.csd-hero__proj-count {
    color: var(--color-gray-400);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-gray-800);
}

.csd-hero__title {
    font-family: var(--font-family-heading);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.02;
    color: var(--color-white);
    margin: 0 0 var(--space-6);
}

.csd-hero__excerpt {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    line-height: var(--line-height-relaxed);
    max-width: 620px;
    margin: 0;
}

.csd-hero__excerpt p {
    margin: 0;
}


/* =============================================================================
   2. BARRA DE SERVICIOS
   ============================================================================= */

.csd-services-bar {
    background: var(--color-black);
    border-top: 1px solid var(--color-gray-800);
    border-bottom: 1px solid var(--color-gray-800);
    padding: var(--space-4) 0;
}

.csd-services-bar .container {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    flex-wrap: wrap;
}

.csd-services-bar__label {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 0;
    white-space: nowrap;
    flex-shrink: 0;
}

.csd-services-bar__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.csd-svc-tag {
    display: inline-block;
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.06em;
    color: var(--color-gray-300);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-gray-700);
    border-radius: var(--border-radius-sm);
    padding: var(--space-1) var(--space-3);
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.csd-svc-tag:hover {
    color: var(--color-white);
    border-color: var(--color-gray-500);
}


/* =============================================================================
   3. ETIQUETA DE SECCIÓN (compartida)
   ============================================================================= */

.csd-section-label {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.csd-section-label--center {
    justify-content: center;
}

.csd-section-num {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    letter-spacing: 0.08em;
}

.csd-section-name {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.14em;
}


/* =============================================================================
   4. DESAFÍO / SOLUCIÓN — secciones independientes
   ============================================================================= */

.csd-point {
    padding: var(--space-16) 0;
    background: var(--color-secondary);
    border-top: 1px solid var(--color-gray-800);
}

.csd-point--reto {
    border-top-color: rgba(239, 68, 68, 0.2);
}

.csd-point--solucion {
    border-top-color: rgba(190, 234, 7, 0.18);
}

.csd-point__inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .csd-point__inner {
        grid-template-columns: 200px 1fr;
        align-items: start;
        gap: var(--space-16);
    }
}

.csd-point__label {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

@media (min-width: 768px) {
    .csd-point__label {
        position: sticky;
        top: calc(var(--header-height, 72px) + var(--space-8));
    }
}

.csd-point__num {
    font-family: var(--font-family-heading);
    font-size: clamp(3.5rem, 6vw, 6rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1;
    letter-spacing: -0.04em;
}

.csd-point--reto .csd-point__num {
    color: rgba(239, 68, 68, 0.18);
}

.csd-point--solucion .csd-point__num {
    color: rgba(190, 234, 7, 0.2);
}

.csd-point__name {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.csd-point--reto .csd-point__name {
    color: rgba(239, 68, 68, 0.55);
}

.csd-point--solucion .csd-point__name {
    color: rgba(190, 234, 7, 0.65);
}

.csd-point--resumen .csd-point__num {
    color: rgba(255, 255, 255, 0.06);
}

.csd-point--resumen .csd-point__name {
    color: var(--color-gray-600);
}

.csd-point--resultados {
    background: var(--color-black);
}

.csd-point--resultados .csd-point__num {
    color: rgba(190, 234, 7, 0.15);
}

.csd-point--resultados .csd-point__name {
    color: rgba(190, 234, 7, 0.6);
}

.csd-point__resultados-text {
    margin-bottom: var(--space-10);
}

.csd-point__text {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    line-height: var(--line-height-relaxed);
    margin: 0;
}

@media (min-width: 768px) {
    .csd-point__text {
        font-size: var(--font-size-xl);
        padding-top: var(--space-2);
    }
}


/* =============================================================================
   5. PROSE
   ============================================================================= */

.csd-prose {
    color: var(--color-gray-300);
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
}

.csd-prose h2,
.csd-prose h3,
.csd-prose h4 {
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-top: var(--space-10);
    margin-bottom: var(--space-4);
    line-height: var(--line-height-tight);
}

.csd-prose h2 { font-size: var(--font-size-3xl); }
.csd-prose h3 { font-size: var(--font-size-2xl); }
.csd-prose h4 { font-size: var(--font-size-xl); }

.csd-prose p {
    margin-bottom: var(--space-5);
    color: var(--color-gray-400);
}

.csd-prose strong {
    color: var(--color-white);
    font-weight: var(--font-weight-semibold);
}

.csd-prose em {
    color: var(--color-primary);
    font-style: italic;
}

.csd-prose a {
    color: var(--color-primary);
    text-decoration: underline;
    text-decoration-color: rgba(190, 234, 7, 0.4);
    transition: text-decoration-color var(--transition-fast);
}

.csd-prose a:hover {
    text-decoration-color: var(--color-primary);
}

.csd-prose ul,
.csd-prose ol {
    margin-bottom: var(--space-5);
    padding-left: var(--space-6);
}

.csd-prose li {
    margin-bottom: var(--space-2);
}

.csd-prose ul li::marker {
    color: var(--color-primary);
}

.csd-prose blockquote {
    border-left: 3px solid var(--color-primary);
    padding-left: var(--space-5);
    margin: var(--space-8) 0;
    color: var(--color-gray-400);
    font-style: italic;
}

.csd-prose img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    margin: var(--space-8) 0;
}

.csd-prose figure {
    margin: var(--space-8) 0;
}

.csd-prose figcaption {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    margin-top: var(--space-2);
    text-align: center;
}


/* =============================================================================
   5b. MÉTRICAS / STATS GRID
   ============================================================================= */

.csd-metrics__intro {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    text-align: center;
    margin: 0 0 var(--space-10);
}

.csd-metrics__grid {
    display: grid;
    gap: 1px;
    background: var(--color-gray-800);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
}

.csd-metrics__grid--1 { grid-template-columns: 1fr; }
.csd-metrics__grid--2 { grid-template-columns: repeat(2, 1fr); }
.csd-metrics__grid--3 { grid-template-columns: repeat(3, 1fr); }
.csd-metrics__grid--4 { grid-template-columns: repeat(2, 1fr); }

@media (min-width: 768px) {
    .csd-metrics__grid--3 { grid-template-columns: repeat(3, 1fr); }
    .csd-metrics__grid--4 { grid-template-columns: repeat(4, 1fr); }
}

.csd-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-10) var(--space-6);
    background: var(--color-secondary);
    text-align: center;
    transition: background var(--transition-base);
}

.csd-metric:hover {
    background: rgba(190, 234, 7, 0.03);
}

.csd-metric__valor {
    font-family: var(--font-family-heading);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.csd-metric__desc {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    max-width: 14ch;
}


/* =============================================================================
   6. TESTIMONIO
   ============================================================================= */

.csd-testimonial {
    padding: var(--space-16) 0;
    background: var(--color-secondary);
    border-top: 1px solid var(--color-gray-800);
}

.csd-testimonial__inner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.csd-testimonial__quote-icon {
    color: var(--color-primary);
    opacity: 0.4;
    margin-bottom: var(--space-6);
}

.csd-testimonial__text {
    font-family: var(--font-family-heading);
    font-size: clamp(1.35rem, 3vw, 2rem);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-snug);
    color: var(--color-white);
    font-style: italic;
    margin: 0 0 var(--space-6);
}

.csd-testimonial__author {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    font-style: normal;
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.06em;
}

.csd-testimonial__cargo {
    font-size: var(--font-size-xs);
    color: var(--color-gray-600);
    font-weight: var(--font-weight-normal);
    letter-spacing: 0.04em;
}


/* =============================================================================
   7. PROYECTOS RELACIONADOS
   ============================================================================= */

.csd-projects {
    padding: var(--space-16) 0 var(--space-20);
    background: var(--color-black);
    border-top: 1px solid var(--color-gray-800);
}

.csd-projects__header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.csd-projects__title {
    font-family: var(--font-family-heading);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.02;
    color: var(--color-white);
    margin: 0;
}

.csd-projects__accent {
    color: var(--color-primary);
    font-style: normal;
}

.csd-projects__sub {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin: 0;
    flex-shrink: 0;
    padding-bottom: var(--space-2);
}

/* Grid de proyectos */
.csd-projects__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

@media (min-width: 640px) {
    .csd-projects__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .csd-projects__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Tarjeta mini de proyecto */
.csd-proj-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--color-gray-900);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    cursor: pointer;
    transition:
        transform var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
}

.csd-proj-card:hover {
    transform: translateY(-4px);
    border-color: rgba(190, 234, 7, 0.2);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.csd-proj-card__thumb {
    display: block;
    position: relative;
    overflow: hidden;
    aspect-ratio: 3 / 2;
    background: var(--color-gray-800);
    flex-shrink: 0;
}

.csd-proj-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.csd-proj-card:hover .csd-proj-card__img {
    transform: scale(1.06);
}

.csd-proj-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(190, 234, 7, 0.02);
    color: var(--color-gray-700);
}

.csd-proj-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(17, 24, 39, 0) 30%,
        rgba(17, 24, 39, 0.88) 100%
    );
    display: flex;
    align-items: flex-end;
    padding: var(--space-3);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.csd-proj-card:hover .csd-proj-card__overlay {
    opacity: 1;
}

.csd-proj-card__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
}

.csd-proj-card__cta svg {
    transition: transform var(--transition-fast);
}

.csd-proj-card:hover .csd-proj-card__cta svg {
    transform: translateX(2px);
}

/* Badge tipo en esquina */
.csd-proj-card__tipo {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    font-family: var(--font-family-mono);
    font-size: 0.6rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-black);
    background: var(--color-primary);
    border-radius: var(--border-radius-sm);
    padding: 2px 6px;
    z-index: 2;
}

.csd-proj-card__body {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    flex-grow: 1;
    position: relative;
}

.csd-proj-card__title a::after {
    content: '';
    position: absolute;
    inset: 0;
    top: -999px;
}

.csd-proj-card__title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin: 0;
}

.csd-proj-card__title a {
    color: var(--color-gray-200);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.csd-proj-card:hover .csd-proj-card__title a {
    color: var(--color-primary);
}

.csd-proj-card__svcs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.csd-proj-card__svc {
    font-family: var(--font-family-mono);
    font-size: 0.6rem;
    color: var(--color-gray-600);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--border-radius-sm);
    padding: 1px 6px;
}


/* =============================================================================
   8. NAVEGACIÓN PREV / NEXT
   ============================================================================= */

.csd-nav-cases {
    background: var(--color-secondary);
    border-top: 1px solid var(--color-gray-800);
    padding: var(--space-8) 0;
}

.csd-nav-cases__inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--space-5);
}

.csd-nav-case {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    text-decoration: none;
    padding: var(--space-5) var(--space-6);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--border-radius-lg);
    background: rgba(255, 255, 255, 0.02);
    transition:
        background var(--transition-base),
        border-color var(--transition-base);
}

.csd-nav-case:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--color-gray-700);
}

.csd-nav-case--next {
    align-items: flex-end;
    text-align: right;
}

.csd-nav-case__dir {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-500);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.csd-nav-case__title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    line-height: var(--line-height-tight);
}

.csd-nav-case:hover .csd-nav-case__title {
    color: var(--color-primary);
}

.csd-nav-cases__all {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    color: var(--color-gray-500);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--border-radius-base);
    transition:
        color var(--transition-fast),
        border-color var(--transition-fast);
}

.csd-nav-cases__all:hover {
    color: var(--color-primary);
    border-color: rgba(190, 234, 7, 0.3);
}


/* =============================================================================
   9. CTA
   ============================================================================= */

.csd-cta {
    background: var(--color-black);
    border-top: 1px solid var(--color-gray-800);
    padding: var(--space-20) 0;
    text-align: center;
}

.csd-cta__inner {
    max-width: 600px;
    margin: 0 auto;
}

.csd-cta__eyebrow {
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin: 0 0 var(--space-4);
}

.csd-cta__title {
    font-family: var(--font-family-heading);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.05;
    color: var(--color-white);
    margin: 0 0 var(--space-8);
}

.csd-cta__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}


/* =============================================================================
   10. RESPONSIVE
   ============================================================================= */

@media (max-width: 767px) {
    .csd-hero--has-image {
        min-height: 55vh;
        padding-bottom: var(--space-14);
    }

    .csd-hero__title {
        font-size: clamp(2rem, 9vw, 3rem);
    }

    .csd-hero__excerpt {
        font-size: var(--font-size-base);
    }

    .csd-services-bar .container {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .csd-point {
        padding: var(--space-12) 0;
    }

    .csd-point__num {
        font-size: clamp(3rem, 10vw, 4rem);
    }

    .csd-point__label {
        flex-direction: row;
        align-items: baseline;
        gap: var(--space-3);
    }

    .csd-point__num {
        font-size: 2.5rem;
    }

    .csd-projects__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }

    .csd-projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .csd-nav-cases__inner {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
        gap: var(--space-3);
    }

    .csd-nav-cases__all {
        order: -1;
        grid-column: span 2;
        justify-self: center;
    }

    .csd-cta__actions {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (min-width: 768px) {
    .csd-hero__excerpt {
        font-size: var(--font-size-xl);
    }

    .csd-prose {
        font-size: var(--font-size-xl);
    }
}