/* ============================================= */
/* CASE STUDY — estilo NoGood SteelSeries (v2)     */
/* ============================================= */

.cs-main {
  --cs-bg: #0D0D0F;
  --cs-bg-soft: #131316;
  --cs-bg-card: #1A1A1D;
  --cs-bg-card-2: #16161A;
  --cs-border: rgba(255, 255, 255, 0.07);
  --cs-border-strong: rgba(255, 255, 255, 0.12);
  --cs-text: #FFFFFF;
  --cs-text-soft: rgba(255, 255, 255, 0.78);
  --cs-text-dim: rgba(255, 255, 255, 0.45);
  --cs-accent: #7A3DFF;
  --cs-accent-2: #4B1FC0;
  --cs-gradient-card:
    linear-gradient(100deg,
      #18181C 0%,
      #18181C 38%,
      #3A2380 62%,
      #6A3DFF 88%,
      #8A5CFF 100%);
}

body { background: var(--cs-bg); }

.cs-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

/* ============================================= */
/* HERO                                           */
/* ============================================= */
.cs-hero {
  position: relative;
  padding: clamp(120px, 15vw, 180px) 0 clamp(40px, 5vw, 60px);
  background: var(--cs-bg);
  overflow: hidden;
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cs-text-dim);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.04em;
  margin-bottom: clamp(40px, 6vw, 72px);
  transition: color 0.2s var(--ease);
}
.cs-back:hover { color: #FFFFFF; }

.cs-hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: start;
  margin-bottom: clamp(48px, 6vw, 80px);
}

/* LEFT side */
.cs-hero-client-mark {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: clamp(32px, 4vw, 48px);
}
.cs-hero-client-logo {
  width: clamp(44px, 5vw, 56px);
  height: clamp(44px, 5vw, 56px);
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.cs-hero-client-name {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  line-height: 1;
}

.cs-hero-quote-wrap { position: relative; margin-bottom: clamp(24px, 3vw, 36px); }
.cs-hero-quote-mark {
  font-family: var(--font-display);
  font-size: 44px;
  line-height: 0.4;
  color: var(--cs-text);
  margin-bottom: 4px;
  opacity: 0.9;
}
.cs-hero-quote {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 42px);
  line-height: 1.15;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  margin: 0;
}

.cs-hero-author { display: flex; align-items: center; gap: 12px; }
.cs-hero-author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.cs-hero-author-name {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
  line-height: 1.2;
}
.cs-hero-author-role {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--cs-text-dim);
  line-height: 1.2;
  margin-top: 2px;
}

/* RIGHT — stat cards (NoGood style: card oscuro con gradient morado a la derecha) */
.cs-hero-right {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.cs-hero-stat {
  position: relative;
  padding: clamp(22px, 2.5vw, 32px) clamp(24px, 3vw, 40px);
  border-radius: 18px;
  background: var(--cs-gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.cs-hero-stat-top {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-display);
  font-size: clamp(48px, 6vw, 78px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: #FFFFFF;
  margin-bottom: 12px;
}
.cs-arrow-up, .cs-arrow-down {
  font-size: 0.6em;
  color: #00E3FF;
  font-weight: 700;
  display: inline-block;
  line-height: 1;
}
.cs-arrow-down { color: #00E3FF; transform: rotate(180deg); }
.cs-hero-stat-unit {
  font-size: 0.45em;
  font-weight: 600;
  margin-left: 2px;
  opacity: 0.9;
}
.cs-hero-stat-label {
  font-family: var(--font-body);
  font-size: clamp(13px, 1vw, 15px);
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.82);
  max-width: 85%;
}

/* SUB-HERO strip */
.cs-subhero {
  margin-top: clamp(32px, 4vw, 56px);
}
.cs-subhero-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(22px, 2.5vw, 28px) clamp(26px, 3vw, 36px);
  border-radius: 18px;
  background: var(--cs-bg-card);
  border: 1px solid var(--cs-border);
}
.cs-subhero-text {
  font-family: var(--font-body);
  font-size: clamp(14px, 1vw, 16px);
  line-height: 1.5;
  color: var(--cs-text-soft);
  margin: 0;
  max-width: 70%;
}
.cs-subhero-cta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: #FFFFFF;
  text-decoration: none;
  flex-shrink: 0;
}
.cs-subhero-cta-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  font-size: 16px;
  transition: background 0.2s var(--ease);
}
.cs-subhero-cta:hover .cs-subhero-cta-icon { background: var(--cs-accent); }

/* ============================================= */
/* BODY — sidebar + content                       */
/* ============================================= */
.cs-body {
  position: relative;
  padding: clamp(60px, 8vw, 100px) 0 clamp(60px, 8vw, 120px);
  background: var(--cs-bg);
  border-top: 1px solid var(--cs-border);
}

.cs-layout {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}

/* STICKY SIDEBAR — limpio, sin icono + */
.cs-sidebar {
  position: sticky;
  top: 100px;
  align-self: start;
}
.cs-sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.cs-sidebar-link {
  display: block;
  padding: 10px 0;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cs-text-dim);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.cs-sidebar-link:hover { color: rgba(255, 255, 255, 0.75); }
.cs-sidebar-link.is-active { color: #FFFFFF; }

/* CONTENT */
.cs-content {
  display: flex;
  flex-direction: column;
  gap: clamp(72px, 10vw, 140px);
  max-width: 820px;
}

.cs-article { scroll-margin-top: 90px; }
.cs-article-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 4.5vw, 58px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: #FFFFFF;
  margin: 0 0 clamp(24px, 3vw, 36px);
}
.cs-article-body {
  font-family: var(--font-body);
  font-size: clamp(15px, 1.05vw, 16px);
  line-height: 1.65;
  color: var(--cs-text-soft);
}
.cs-article-body p { margin: 0 0 1.3em; }
.cs-article-body p:last-child { margin-bottom: 0; }
.cs-article-body strong { color: #FFFFFF; font-weight: 600; }

.cs-article-intro {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.2vw, 19px);
  line-height: 1.55;
  color: var(--cs-text-soft);
  max-width: 620px;
  margin: 0 0 clamp(28px, 4vw, 44px);
}

/* Bullets */
.cs-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.cs-bullets li {
  position: relative;
  padding: 2px 0 2px 22px;
  font-family: var(--font-body);
  font-size: clamp(15px, 1vw, 16px);
  line-height: 1.6;
  color: var(--cs-text-soft);
}
.cs-bullets li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--cs-text-soft);
  font-size: 18px;
  line-height: 1.4;
}
.cs-bullets li strong { color: #FFFFFF; font-weight: 700; }
.cs-bullets--tight li { padding-top: 0; padding-bottom: 0; }

/* Services grid — sin iconos, cards grises */
.cs-services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.cs-service-card {
  padding: clamp(28px, 3vw, 40px) clamp(24px, 2.5vw, 32px);
  min-height: clamp(140px, 14vw, 180px);
  display: flex;
  align-items: flex-end;
  background: var(--cs-bg-card);
  border: 1px solid var(--cs-border);
  border-radius: 14px;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.cs-service-card:hover {
  background: var(--cs-bg-card-2);
  border-color: var(--cs-border-strong);
}
.cs-service-title {
  font-family: var(--font-body);
  font-size: clamp(17px, 1.4vw, 22px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  margin: 0;
}

/* Accordion */
.cs-accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cs-accordion-item {
  background: var(--cs-bg-card);
  border: 1px solid var(--cs-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s var(--ease);
}
.cs-accordion-item[open] {
  border-color: var(--cs-border-strong);
}
.cs-accordion-sum {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(20px, 2vw, 26px) clamp(22px, 2.5vw, 30px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: clamp(16px, 1.1vw, 18px);
  font-weight: 600;
  color: #FFFFFF;
}
.cs-accordion-sum::-webkit-details-marker { display: none; }
.cs-accordion-chev {
  flex-shrink: 0;
  position: relative;
  width: 20px;
  height: 20px;
}
.cs-accordion-chev::before,
.cs-accordion-chev::after {
  content: "";
  position: absolute;
  background: rgba(255, 255, 255, 0.75);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.cs-accordion-chev::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}
.cs-accordion-chev::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}
.cs-accordion-item[open] .cs-accordion-chev::after { opacity: 0; transform: translateX(-50%) rotate(90deg); }
.cs-accordion-body {
  padding: 0 clamp(22px, 2.5vw, 30px) clamp(22px, 2.5vw, 28px);
  font-family: var(--font-body);
  font-size: clamp(14px, 1vw, 15px);
  line-height: 1.65;
  color: var(--cs-text-soft);
}
.cs-accordion-body p { margin: 0; }

/* RESULTS — 2 cols: text + sticky cards */
.cs-article--results { scroll-margin-top: 90px; }
.cs-results-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
.cs-results-sub {
  margin-top: 1.5em;
  margin-bottom: 0.6em;
}
.cs-results-cards {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.cs-results-card {
  padding: clamp(22px, 2.5vw, 30px) clamp(24px, 3vw, 32px);
  border-radius: 16px;
  background: var(--cs-gradient-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.cs-results-card-num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-display);
  font-size: clamp(40px, 4vw, 56px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: #FFFFFF;
  margin-bottom: 10px;
}
.cs-results-card-label {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.82);
}

/* ============================================= */
/* CTA final                                      */
/* ============================================= */
.cs-cta {
  position: relative;
  padding: clamp(90px, 12vw, 140px) 0;
  background: var(--cs-bg);
  border-top: 1px solid var(--cs-border);
}
.cs-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cs-cta-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 68px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: #FFFFFF;
  margin: 0;
  max-width: 640px;
}
.cs-cta-accent { color: var(--cs-accent); }

/* ============================================= */
/* RESPONSIVE                                     */
/* ============================================= */
@media (max-width: 960px) {
  .cs-hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .cs-subhero-pill { flex-direction: column; align-items: flex-start; }
  .cs-subhero-text { max-width: 100%; }
  .cs-layout { grid-template-columns: 1fr; gap: 32px; }
  .cs-sidebar {
    position: static;
    background: var(--cs-bg-soft);
    padding: 8px 4px;
    border-radius: 10px;
    border: 1px solid var(--cs-border);
  }
  .cs-sidebar-nav {
    flex-direction: row;
    overflow-x: auto;
    gap: 4px;
    scrollbar-width: none;
  }
  .cs-sidebar-nav::-webkit-scrollbar { display: none; }
  .cs-sidebar-link {
    padding: 10px 14px;
    white-space: nowrap;
    border-radius: 8px;
  }
  .cs-sidebar-link.is-active { background: rgba(255, 255, 255, 0.08); }
  .cs-content { max-width: 100%; }
  .cs-services-grid { grid-template-columns: 1fr 1fr; }
  .cs-results-grid { grid-template-columns: 1fr; }
  .cs-results-cards { position: static; }
  .cs-cta-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .cs-hero-quote { font-size: 26px; }
  .cs-hero-stat-top { font-size: 54px; }
  .cs-article-title { font-size: 36px; }
  .cs-services-grid { grid-template-columns: 1fr; }
}