/* ============================================================
   DealFlow Partners — Case Studies Styles
   ============================================================ */

/* ----- Solid Navbar (for subpages with no transparent hero) ----- */
.navbar--solid {
  background: var(--color-primary);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar__links a.active {
  color: var(--color-accent-light);
}

/* ============================================================
   LISTING PAGE (case-studies.html)
   ============================================================ */

/* ----- Hero ----- */
.cs-hero {
  padding: 140px 0 60px;
  text-align: center;
  background: var(--color-primary);
}

.cs-hero__title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--color-white);
  margin-top: 16px;
  margin-bottom: 16px;
}

.cs-hero__sub {
  font-size: 1.125rem;
  color: var(--color-neutral);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ----- Grid Section ----- */
.cs-grid-section {
  padding: 40px 0 var(--section-py);
  background: var(--color-primary);
}

.cs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

/* ----- Cards ----- */
.cs-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.cs-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-glow);
}

.cs-card--placeholder {
  opacity: 0.55;
  pointer-events: none;
}

.cs-card__image {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%;
  background: var(--color-surface-2);
  overflow: hidden;
}

.cs-card__placeholder {
  color: var(--color-neutral);
  opacity: 0.4;
}

.cs-card__graphic {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.cs-card__img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center;
}

.cs-card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.cs-card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent-light);
  background: rgba(59, 130, 246, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  width: fit-content;
}

.cs-card__title {
  font-family: var(--font-headline);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.4;
}

.cs-card__metrics {
  display: flex;
  gap: 24px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.cs-card__metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cs-card__metric-num {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent-light);
}

.cs-card__metric-label {
  font-size: 0.75rem;
  color: var(--color-neutral);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ----- CTA Section ----- */
.cs-cta {
  padding: var(--section-py) 0;
  background: var(--color-primary);
}

.cs-cta__inner {
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 64px 40px;
}

.cs-cta__title {
  font-family: var(--font-headline);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 12px;
}

.cs-cta__sub {
  font-size: 1.05rem;
  color: var(--color-neutral);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   DETAIL PAGE (case-study-1.html)
   ============================================================ */

/* ----- Back Link ----- */
.csd-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-neutral);
  text-decoration: none;
  margin-bottom: 32px;
  transition: color var(--transition-fast);
}

.csd-back:hover {
  color: var(--color-accent-light);
}

/* ----- Detail Hero ----- */
.csd-hero {
  padding: 140px 0 60px;
  background: var(--color-primary);
}

.csd-hero__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.csd-hero__text {
  flex: 1;
}

.csd-hero__title {
  font-family: var(--font-headline);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.2;
  margin-top: 16px;
}

.csd-hero__logo {
  flex-shrink: 0;
}

.csd-logo-placeholder {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-lg);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-neutral);
  font-size: 0.85rem;
  font-weight: 500;
}

/* ----- Content Sections ----- */
.csd-section {
  padding: var(--section-py) 0;
  background: var(--color-primary);
}

.csd-section--surface {
  background: var(--color-surface);
}

.csd-container {
  max-width: 900px;
  margin: 0 auto;
}

.csd-section__title {
  font-family: var(--font-headline);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 24px;
}

.csd-section__text {
  font-size: 1.05rem;
  color: var(--color-neutral);
  line-height: 1.8;
  max-width: 720px;
}

/* ----- Challenge Cards ----- */
.csd-challenges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.csd-challenge {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
}

.csd-challenge__icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.csd-challenge h4 {
  font-family: var(--font-headline);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.csd-challenge p {
  font-size: 0.9rem;
  color: var(--color-neutral);
  line-height: 1.6;
}

/* ----- Solution Steps ----- */
.csd-solutions {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.csd-solution {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.csd-solution__num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.csd-solution h4 {
  font-family: var(--font-headline);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.csd-solution p {
  font-size: 0.95rem;
  color: var(--color-neutral);
  line-height: 1.7;
}

/* ----- Hero Stat (detail page) ----- */
.csd-hero__metric {
  flex-shrink: 0;
}

.csd-hero-stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.csd-hero-stat__number {
  font-family: var(--font-headline);
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--color-accent-light);
}

.csd-hero-stat__label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-neutral);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ----- Target Audience ----- */
.csd-audience__segments {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.csd-audience__segment {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-white);
}

.csd-audience__icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ----- Results Grid ----- */
.csd-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.csd-result {
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.csd-result__number {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-accent-light);
}

.csd-result__label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-white);
}

.csd-result__detail {
  font-size: 0.78rem;
  color: var(--color-neutral);
}

.csd-results__note {
  margin-top: 28px;
  font-size: 0.95rem;
  color: var(--color-neutral);
  text-align: center;
  font-style: italic;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  .cs-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .cs-hero {
    padding: 120px 0 40px;
  }

  .cs-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .cs-grid--2 {
    grid-template-columns: 1fr;
  }


  .cs-cta__inner {
    padding: 48px 24px;
  }

  .csd-hero {
    padding: 120px 0 40px;
  }

  .csd-hero__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .csd-hero-stat {
    padding: 24px 32px;
  }

  .csd-logo-placeholder {
    width: 100px;
    height: 100px;
  }

  .csd-section {
    padding: var(--section-py-mobile) 0;
  }

  .csd-challenges {
    grid-template-columns: 1fr;
  }

  .csd-results {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .csd-result {
    padding: 24px 16px;
  }

  .csd-audience__segments {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .cs-hero__title {
    font-size: 1.75rem;
  }

  .csd-hero__title {
    font-size: 1.5rem;
  }

  .csd-hero-stat__number {
    font-size: 2rem;
  }

  .csd-results {
    grid-template-columns: 1fr;
  }

  .csd-result__number {
    font-size: 2rem;
  }

  .cs-card__metrics {
    flex-direction: column;
    gap: 12px;
  }
}