/* =============================================
   CASE STUDIES PAGE — ADDITIONAL STYLES
   Inherits all variables and base from styles.css
   ============================================= */

/* ---- NAV LINKS ---- */
.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s;
}

.nav__link:hover,
.nav__link--active {
  color: var(--white);
}

/* =============================================
   PAGE HERO
   ============================================= */
.cs-hero {
  padding: 140px 0 80px;
  text-align: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.cs-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse at top, rgba(251,146,60,0.10) 0%, transparent 70%);
  pointer-events: none;
}

.cs-hero__inner {
  position: relative;
  z-index: 1;
}

.cs-hero__headline {
  font-size: clamp(44px, 6vw, 80px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 20px;
}

.cs-hero__sub {
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--text-light);
  max-width: 520px;
  margin: 0 auto 52px;
  line-height: 1.65;
}

/* Hero summary bar */
.cs-hero__bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: 28px 40px;
  max-width: 860px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 24px;
}

.cs-hero__bar-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  flex: 1;
  min-width: 140px;
}

.cs-hero__bar-stat span {
  font-size: 30px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.cs-hero__bar-stat small {
  font-size: 13px;
  color: var(--text-light);
  text-align: center;
}

.cs-hero__bar-divider {
  width: 1px;
  height: 44px;
  background: var(--border);
  flex-shrink: 0;
  display: none;
}

@media (min-width: 640px) {
  .cs-hero__bar-divider { display: block; }
  .cs-hero__bar { gap: 0; }
}

/* =============================================
   FEATURED CASE STUDY
   ============================================= */
.cs-featured__card {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 56px;
  align-items: start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 52px;
  margin-top: 40px;
  position: relative;
  overflow: hidden;
}

.cs-featured__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(to right, var(--accent), rgba(251,146,60,0.3));
}

@media (max-width: 900px) {
  .cs-featured__card {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 32px;
  }
}

.cs-featured__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.cs-featured__title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 6px;
}

.cs-featured__company {
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 24px;
}

.cs-featured__body {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.75;
  margin-bottom: 16px;
}

.cs-featured__quote {
  margin-top: 32px;
  border-left: 3px solid var(--accent);
  padding-left: 20px;
}

.cs-featured__quote p {
  font-size: 16px;
  color: var(--white);
  font-style: italic;
  line-height: 1.65;
  margin-bottom: 12px;
}

.cs-featured__quote strong {
  font-size: 13px;
  color: var(--muted);
  font-style: normal;
}

/* Metrics grid for featured */
.cs-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.cs-metric {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.cs-metric--accent {
  border-color: var(--border-accent);
  background: rgba(251,146,60,0.07);
}

.cs-metric--wide {
  grid-column: span 2;
}

.cs-metric--lg {
  grid-column: span 2;
  padding: 24px;
}

.cs-metric__num {
  display: block;
  font-size: 34px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.cs-metric p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.4;
}

/* Before/after display */
.cs-metric__before-after {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.cs-metric__before {
  font-size: 28px;
  font-weight: 900;
  color: var(--muted-2);
}

.cs-metric__arrow {
  font-size: 22px;
  color: var(--accent);
}

.cs-metric__after {
  font-size: 44px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.02em;
}

/* =============================================
   CASE STUDY GRID
   ============================================= */
.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

@media (max-width: 740px) {
  .cs-grid { grid-template-columns: 1fr; }
}

.cs-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: border-color 0.2s;
  position: relative;
  overflow: hidden;
}

.cs-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
}

.cs-card:hover {
  border-color: var(--border-accent);
}

.cs-card:hover::after {
  opacity: 1;
}

.cs-card__header {
  margin-bottom: 20px;
}

.cs-card__tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.cs-card__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 6px;
}

.cs-card__company {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

.cs-card__body {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.cs-card__metrics {
  display: flex;
  gap: 12px;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

.cs-card__metric {
  flex: 1;
  text-align: center;
}

.cs-card__metric span {
  display: block;
  font-size: 22px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.cs-card__metric small {
  font-size: 11px;
  color: var(--text-light);
  line-height: 1.4;
  display: block;
}

.cs-card__timeline {
  margin-top: 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted-2);
  letter-spacing: 0.04em;
}

/* =============================================
   RESULTS SUMMARY
   ============================================= */
.cs-summary__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

@media (max-width: 820px) {
  .cs-summary__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.cs-summary__text p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.7;
  margin-top: 8px;
}

.cs-summary__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.cs-summary__stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.cs-summary__stat--accent {
  border-color: var(--border-accent);
  background: rgba(251,146,60,0.07);
}

.cs-summary__stat span {
  display: block;
  font-size: 36px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.cs-summary__stat small {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.4;
}

/* =============================================
   BOTTOM CTA
   ============================================= */
.cs-cta__inner {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.cs-cta__sub {
  font-size: 17px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 36px;
}

.cs-cta__bullets {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  font-size: 13px;
  color: var(--muted);
}

.cs-cta__dot {
  color: var(--border);
}