/* ============================================
   CASE STUDY — shared layout
   Builds on top of styles.css variables
   ============================================ */

/* ─────────────────────────────────────────────
   QUICK NAV — sticky sidebar scrollspy
   ───────────────────────────────────────────── */

/* ── Page Layout: sidebar column + content column ── */
.cs-page-layout {
  display: grid;
  grid-template-columns: 210px 1fr;
  align-items: start;
  transition: grid-template-columns 0.3s cubic-bezier(.16, 1, .3, 1);
}
.cs-page-layout.is-collapsed {
  grid-template-columns: 52px 1fr;
}
.cs-page-content { min-width: 0; }

.cs-quicknav {
  position: sticky;
  top: 80px;
  height: calc(100vh - 100px);
  overflow: hidden;
  overflow-y: auto;
  scrollbar-width: none;
  padding: 20px 8px 20px 12px;
}
.cs-quicknav::-webkit-scrollbar { display: none; }

/* ── Collapse toggle button ── */
.cs-qn-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid rgba(6, 8, 16, 0.10);
  background: rgba(255, 255, 255, 0.90);
  color: rgba(6, 8, 16, 0.50);
  cursor: pointer;
  margin-bottom: 16px;
  margin-left: auto;
  transition: background 0.18s, color 0.18s, transform 0.3s cubic-bezier(.16, 1, .3, 1);
}
.cs-qn-collapse-btn:hover { background: rgba(6, 8, 16, 0.06); color: rgba(6, 8, 16, 0.88); }
.cs-qn-collapse-btn:focus-visible { outline: 2px solid #1d5fcc; outline-offset: 2px; }
.cs-quicknav.is-collapsed .cs-qn-collapse-btn { transform: rotate(180deg); margin-left: auto; margin-right: auto; }

/* ── Desktop list ── */
.cs-qn-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(6, 8, 16, 0.09);
  border-radius: 16px;
  padding: 14px 8px;
  box-shadow: 0 4px 28px rgba(6, 8, 16, 0.07);
  /* prevent overflow on short viewports */
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  scrollbar-width: none;
}
.cs-qn-list::-webkit-scrollbar { display: none; }

.cs-qn-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px 8px 10px;
  border-radius: 9px;
  text-decoration: none;
  cursor: pointer;
  /* min 44 px touch target height */
  min-height: 36px;
  transition: background 0.2s;
  /* focus ring via outline */
  outline-offset: 2px;
}
.cs-qn-item:hover { background: rgba(6, 8, 16, 0.05); }

/* Keyboard focus ring — visible on keyboard navigation only */
.cs-qn-item:focus-visible {
  outline: 2px solid #1d5fcc;
  outline-offset: 2px;
}

.cs-qn-dot {
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(6, 8, 16, 0.22);
  transition: background 0.25s, transform 0.25s;
}
.cs-qn-item.is-active .cs-qn-dot,
.cs-qn-item[aria-current="location"] .cs-qn-dot {
  background: #1d5fcc;
  transform: scale(1.4);
}

.cs-qn-label {
  font-family: 'Satoshi', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(6, 8, 16, 0.60);
  white-space: nowrap;
  line-height: 1.2;
  overflow: hidden;
  transition: color 0.25s, opacity 0.22s ease, max-width 0.28s cubic-bezier(.16, 1, .3, 1);
  max-width: 160px;
}

/* ── Collapsed state ── */
.cs-quicknav.is-collapsed .cs-qn-label {
  opacity: 0;
  max-width: 0;
  pointer-events: none;
}
.cs-quicknav.is-collapsed .cs-qn-item {
  justify-content: center;
  gap: 0;
  padding: 8px 6px;
  position: relative;
}
.cs-quicknav.is-collapsed .cs-qn-item::after {
  content: attr(data-label);
  position: absolute;
  left: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: rgba(6, 8, 16, 0.86);
  color: #fff;
  font-family: 'Satoshi', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  white-space: nowrap;
  padding: 5px 12px;
  border-radius: 7px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s;
  z-index: 300;
}
.cs-quicknav.is-collapsed .cs-qn-item:hover::after,
.cs-quicknav.is-collapsed .cs-qn-item:focus-visible::after { opacity: 1; }
.cs-qn-item.is-active .cs-qn-label,
.cs-qn-item[aria-current="location"] .cs-qn-label {
  background: var(--btn-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}
/* forced-colors (Windows High Contrast): gradient text falls back to system highlight */
@media (forced-colors: active) {
  .cs-qn-item.is-active .cs-qn-label,
  .cs-qn-item[aria-current="location"] .cs-qn-label {
    -webkit-text-fill-color: Highlight;
    color: Highlight;
    background: none;
  }
  .cs-qn-item.is-active .cs-qn-dot,
  .cs-qn-item[aria-current="location"] .cs-qn-dot {
    background: Highlight;
  }
}

/* ── Mobile toggle (hidden on desktop) ── */
.cs-qn-toggle { display: none; }

/* ── Mobile drawer (hidden on desktop) ── */
.cs-qn-drawer { display: none; }

/* ── Tablet (900 – 1279 px): auto-collapsed, dots + tooltip ── */
@media (max-width: 1279px) {
  .cs-page-layout { grid-template-columns: 52px 1fr; }
  .cs-quicknav { padding: 16px 4px; }
  .cs-qn-collapse-btn { display: none; }

  .cs-qn-label { display: none; }

  .cs-qn-item {
    padding: 9px 10px;
    position: relative;
    min-height: 40px;
    justify-content: center;
  }

  /* tooltip that appears to the right on hover / focus */
  .cs-qn-item::after {
    content: attr(data-label);
    position: absolute;
    left: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%);
    background: rgba(6, 8, 16, 0.86);
    color: #fff;
    font-family: 'Satoshi', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    white-space: nowrap;
    padding: 5px 12px;
    border-radius: 7px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.18s;
    /* tooltip is presentational — hide from AT */
    role: tooltip;
  }
  .cs-qn-item:hover::after,
  .cs-qn-item:focus-visible::after { opacity: 1; }

  .cs-qn-dot { width: 8px; height: 8px; }

  .cs-qn-list {
    padding: 12px 8px;
    gap: 5px;
  }
}

/* ── Mobile (< 900 px): floating toggle + bottom drawer ── */
@media (max-width: 899px) {
  .cs-page-layout,
  .cs-page-layout.is-collapsed { grid-template-columns: 1fr; }
  .cs-qn-collapse-btn { display: none; }
  .cs-lessons { grid-template-columns: 1fr; }

  /* sidebar nav hidden on mobile — desktop/tablet only */
  .cs-quicknav {
    display: none;
  }

  .cs-qn-list { display: none; }

  /* floating button — 52×52 px, well above 44px min touch target */
  .cs-qn-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(6, 8, 16, 0.88);
    color: #fff;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(6, 8, 16, 0.26);
    position: relative;
    z-index: 201;
    transition: background 0.2s, transform 0.2s;
  }
  .cs-qn-toggle:hover { background: #1d5fcc; transform: scale(1.06); }
  .cs-qn-toggle:focus-visible {
    outline: 2px solid #1d5fcc;
    outline-offset: 3px;
  }

  /* drawer opens above the button */
  .cs-qn-drawer {
    display: block;
    position: absolute;
    bottom: calc(100% + 12px);
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(6, 8, 16, 0.09);
    border-radius: 16px;
    padding: 10px 8px;
    box-shadow: 0 8px 40px rgba(6, 8, 16, 0.14);
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.22s, transform 0.22s;
    min-width: 172px;
  }
  .cs-quicknav--open .cs-qn-drawer {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .cs-qn-drawer-list {
    display: flex;
    flex-direction: column;
    gap: 3px;
  }
  .cs-qn-drawer-item {
    display: block;
    /* min 44px touch target */
    padding: 10px 16px;
    font-family: 'Satoshi', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    /* rgba(6,8,16,0.60) ≈ contrast 5:1 on white */
    color: rgba(6, 8, 16, 0.60);
    text-decoration: none;
    border-radius: 9px;
    white-space: nowrap;
    transition: background 0.18s, color 0.18s;
    outline-offset: 2px;
  }
  .cs-qn-drawer-item:hover {
    background: rgba(6, 8, 16, 0.05);
    color: rgba(6, 8, 16, 0.88);
  }
  .cs-qn-drawer-item:focus-visible {
    outline: 2px solid #1d5fcc;
    outline-offset: 2px;
  }
  .cs-qn-drawer-item.is-active,
  .cs-qn-drawer-item[aria-current="location"] {
    background: var(--btn-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    font-weight: 700;
  }
  @media (forced-colors: active) {
    .cs-qn-drawer-item.is-active,
    .cs-qn-drawer-item[aria-current="location"] {
      -webkit-text-fill-color: Highlight;
      color: Highlight;
      background: none;
    }
  }
}

/* ── Reduced motion: turn off fade/slide transitions ── */
@media (prefers-reduced-motion: reduce) {
  .cs-page-layout,
  .cs-qn-item,
  .cs-qn-dot,
  .cs-qn-label,
  .cs-qn-drawer,
  .cs-qn-toggle,
  .cs-qn-collapse-btn { transition: none !important; }
  .cs-qn-item.is-active .cs-qn-dot,
  .cs-qn-item[aria-current="location"] .cs-qn-dot { transform: none; }
  .cs-quicknav.is-collapsed .cs-qn-collapse-btn { transform: rotate(180deg); }
}

/* ── Hide quicknav on very small screens ── */
@media (max-width: 359px) {
  .cs-quicknav { display: none; }
}

/* ── END QUICK NAV ── */

/* ── Hero ──────────────────────────────────── */
.cs-hero {
  padding: 150px 40px 100px;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.cs-hero-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none; display: block;
}

.cs-back {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; color: var(--text-3);
  margin-bottom: 56px;
  transition: color 0.2s, gap 0.2s;
  position: relative; z-index: 2;
  cursor: none;
}
.cs-back:hover { color: var(--accent); gap: 12px; }
.cs-back svg { flex-shrink: 0; transition: transform 0.2s; }
.cs-back:hover svg { transform: translateX(-4px); }

.cs-hero-inner { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; }

.cs-tags { display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap; justify-content: center; }
.cs-tag {
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  background: #ffffff;
  border: 1.5px solid rgba(6, 8, 16, 0.15);
  border-radius: 100px; padding: 6px 16px;
  color: #060810;
}

.cs-title {
  font-size: clamp(3.5rem, 9vw, 9rem);
  font-weight: 900; letter-spacing: -0.05em;
  line-height: 1.2;
  background: var(--btn-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 40px;
  overflow: hidden;
  padding-bottom: 0.1em;
  text-align: center;
}

.cs-hero-body {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 48px;
}

.cs-hero-meta {
  display: flex; flex-direction: column; gap: 20px;
  margin-bottom: 0;
}
.cs-hero-meta-item {
  display: flex; flex-direction: column; gap: 4px;
  padding: 0; background: none; border: none; border-radius: 0;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(6, 8, 16, 0.10);
}
.cs-hero-meta-item:last-child { border-bottom: none; padding-bottom: 0; }
.cs-hero-meta-label {
  font-size: 0.6rem; text-transform: uppercase;
  letter-spacing: 0.14em; color: rgba(6, 8, 16, 0.45); font-weight: 600;
}
.cs-hero-meta-value {
  font-size: 0.88rem; color: #060810; font-weight: 700;
  white-space: normal;
}

/* Bold scan anchors — font-weight 700, full text colour */
strong { font-weight: 700; color: var(--text); }

.cs-hero-desc {
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 400;
  color: #060810;
  line-height: 1.78;
  max-width: none;
  margin-bottom: 0;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(6, 8, 16, 0.08);
  border-radius: 16px;
  padding: 24px 28px;
}

.cs-hero-cta-wrap {
  display: flex;
  justify-content: flex-start;
  margin-bottom: 80px;
}

/* ── Case Study Image Hover Effect ─────────── */

/* Containers that need position:relative for the overlay */
.cs-ba-img,
.cs-solution-img { position: relative; }

/* Smooth zoom on the image */
.cs-hero-img,
.cs-ba-img img,
.cs-solution-img img {
  transition: transform 0.5s ease-out;
}
.cs-hero-image:hover .cs-hero-img,
.cs-ba-img:hover img,
.cs-solution-img:hover img {
  transform: scale(1.04);
}

/* Overlay — hidden; zoom-only effect active */
.cs-img-overlay {
  display: none;
}
.cs-hero-image:hover .cs-img-overlay,
.cs-ba-img:hover .cs-img-overlay,
.cs-solution-img:hover .cs-img-overlay {
  background: rgba(0, 0, 0, 0.78);
}

/* Overlay title — slides up & fades in */
.cs-img-overlay-title {
  color: #fff;
  font-family: 'Satoshi', sans-serif;
  font-size: clamp(1rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s, transform 0.35s;
}
.cs-hero-image:hover .cs-img-overlay-title,
.cs-ba-img:hover .cs-img-overlay-title,
.cs-solution-img:hover .cs-img-overlay-title {
  opacity: 1;
  transform: translateY(0);
}

/* Overlay description — slight stagger */
.cs-img-overlay-desc {
  color: rgba(255, 255, 255, 0.82);
  font-family: 'Satoshi', sans-serif;
  font-size: 0.85rem;
  font-weight: 400;
  line-height: 1.5;
  max-width: 280px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s 0.05s, transform 0.35s 0.05s;
}
.cs-hero-image:hover .cs-img-overlay-desc,
.cs-ba-img:hover .cs-img-overlay-desc,
.cs-solution-img:hover .cs-img-overlay-desc {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .cs-hero-img,
  .cs-ba-img img,
  .cs-solution-img img,
  .cs-img-overlay,
  .cs-img-overlay-title,
  .cs-img-overlay-desc { transition: none; }
  .cs-img-overlay-title,
  .cs-img-overlay-desc { opacity: 1; transform: none; }
}

/* ── END Hover Effect ── */

.cs-hero-image {
  position: relative; z-index: 2;
  width: 100%; margin-top: 80px;
  border-radius: 20px; overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 2004 / 1479;
}

.cs-hero-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}

/* ── Section base ──────────────────────────── */
.cs-section { padding: 120px 40px; }
.cs-section--dark  { background: var(--bg-2); }
.cs-section--alt   { background: var(--bg-3); }
.cs-section--flush { padding: 0 40px 80px; }

.cs-inner { max-width: 1200px; margin: 0 auto; }

.cs-eyebrow {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 20px;
}
.cs-eyebrow::before {
  content: ''; width: 6px; height: 6px;
  border-radius: 50%; background: var(--accent); flex-shrink: 0;
}

.cs-heading {
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  font-weight: 900; letter-spacing: -0.04em;
  line-height: 1.2; margin-bottom: 56px;
  overflow: visible;
  text-align: center;
}
.cs-heading em {
  font-style: italic; font-weight: 400;
  background: var(--btn-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  padding: 0.05em 0.12em 0.18em 0;
  display: inline-block;
  line-height: 1.2;
}

.cs-two-col {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: start;
}
.cs-two-col--6040 { grid-template-columns: 1.5fr 1fr; }
.cs-two-col--4060 { grid-template-columns: 1fr 1.5fr; }

.cs-col-head .cs-heading { margin-bottom: 0; }

.cs-col-body p {
  font-size: 1rem; color: var(--text-2); line-height: 1.9;
  margin-bottom: 28px;
}
.cs-col-body p:last-child { margin-bottom: 0; }

/* ── Results list ──────────────────────────── */
.cs-results-list {
  border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
}
.cs-result-item {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 22px 26px;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.cs-result-item:last-child { border-bottom: none; }
.cs-result-item:hover { background: var(--bg-3); }
.cs-result-num {
  font-size: 1.2rem; font-weight: 900; letter-spacing: -0.04em;
  background: var(--btn-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0; min-width: 34px; line-height: 1.3;
}
.cs-result-text {
  font-size: 0.95rem; color: var(--text-2); line-height: 1.75; padding-top: 2px;
}

/* ── Solution items (text above / full-bleed image below) ── */
.cs-solution-items {
  display: flex;
  flex-direction: column;
  gap: 80px;
  margin-top: 64px;
}

.cs-solution-item-text {
  max-width: 1100px;
  margin: 0 auto 32px;
  padding: 0 48px;
}

.cs-solution-fullimg {
  position: relative;
  overflow: hidden;
  width: 100%;
  background: var(--bg-2);
}

.cs-solution-fullimg img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease-out;
}

.cs-solution-fullimg:hover img { transform: scale(1.02); }
.cs-solution-fullimg:hover .cs-img-overlay { background: rgba(0, 0, 0, 0.78); }
.cs-solution-fullimg:hover .cs-img-overlay-title,
.cs-solution-fullimg:hover .cs-img-overlay-desc { opacity: 1; transform: translateY(0); }

@media (max-width: 899px) {
  .cs-solution-item-text { padding: 0 24px; margin-bottom: 20px; }
  .cs-solution-items { gap: 56px; }
}

/* ── Solution rows (text left / image right) ── */
.cs-solution-rows {
  display: flex;
  flex-direction: column;
  gap: 80px;
  margin-top: 64px;
}

.cs-solution-row {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 60px;
  align-items: center;
}

.cs-solution-text {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cs-solution-title {
  font-family: 'Satoshi', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.cs-solution-desc {
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.75;
}

.cs-solution-img {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.10);
  background: var(--bg-2);
}

.cs-solution-img img {
  width: 100%;
  height: auto;
  display: block;
}

.cs-solution-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(10, 22, 60, 0.25);
}

@media (max-width: 768px) {
  .cs-solution-row {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ── Testimonial ───────────────────────────── */
.cs-testimonial {
  padding: 120px 40px;
  background: var(--bg-2);
  text-align: center;
}
.cs-quote-mark {
  font-size: 6rem; font-weight: 900; line-height: 0.65;
  background: var(--btn-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block; margin-bottom: 20px; user-select: none;
}
.cs-quote-text {
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  font-style: italic; color: var(--text);
  line-height: 1.8; max-width: 800px; margin: 0 auto 32px;
}
.cs-quote-attr {
  font-size: 0.82rem; color: var(--text-3);
  display: flex; align-items: center; justify-content: center; gap: 16px;
}
.cs-quote-attr::before, .cs-quote-attr::after {
  content: ''; width: 40px; height: 1px; background: var(--border); flex-shrink: 0;
}
.cs-quote-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

/* ── Gallery ───────────────────────────────── */
.cs-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px; margin-top: 48px;
}
.cs-gallery-item {
  border-radius: 10px; overflow: hidden;
  background: var(--bg-3); border: 1px solid var(--border);
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.1em;
  transition: transform 0.35s var(--ease-out), border-color 0.2s;
}
.cs-gallery-item:hover { transform: scale(1.02); border-color: var(--border-hover); }
.cs-gallery-item--tall { aspect-ratio: 3/4; }
.cs-gallery-item--wide { aspect-ratio: 16/7; grid-column: span 2; }

/* ── More Work ─────────────────────────────── */
.cs-more-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 24px; margin-top: 56px;
}
.cs-more-card {
  border: 1px solid var(--border); border-radius: 16px;
  overflow: hidden; background: var(--card-bg);
  transition: border-color 0.3s, transform 0.35s var(--ease-out);
  cursor: none;
}
.cs-more-card:hover { border-color: var(--border-hover); transform: translateY(-6px); }
.cs-more-img {
  aspect-ratio: 16/9;
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(2rem, 4vw, 3rem); font-weight: 900;
  letter-spacing: -0.05em; color: rgba(255,255,255,0.08);
  transition: color 0.3s;
}
.cs-more-card:hover .cs-more-img { color: rgba(255,255,255,0.14); }
.cs-more-info { padding: 24px; border-top: 1px solid var(--border); }
.cs-more-pills { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.cs-more-pill {
  font-size: 0.65rem; font-weight: 500; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
  border: 1px solid var(--border); border-radius: 100px; padding: 3px 10px;
}
.cs-more-title {
  font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 12px; transition: color 0.2s;
}
.cs-more-card:hover .cs-more-title { color: var(--accent); }
.cs-more-cta {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.78rem; color: var(--text-3);
  transition: color 0.2s, gap 0.2s;
}
.cs-more-card:hover .cs-more-cta { color: var(--accent); gap: 12px; }

/* ── Before / After ────────────────────────── */
.cs-ba-frames {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 48px;
}
.cs-ba-row {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 40px;
  align-items: start;
}
.cs-ba-label {
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 16px;
}
.cs-ba-img {
  border-radius: 12px; overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-3);
  font-size: 0.72rem; color: var(--text-3);
  letter-spacing: 0.1em; text-transform: uppercase;
}
.cs-ba-lists { display: none; } /* replaced by inline .cs-ba-row layout */
.cs-ba-list h3 {
  font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.cs-ba-list ul { list-style: none; margin-top: 0; }
.cs-ba-list li {
  display: flex; gap: 14px; align-items: flex-start;
  font-size: 0.88rem; color: var(--text-2); line-height: 1.65;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.cs-ba-list li:last-child { border-bottom: none; }
.cs-ba-item-content { flex: 1; }
.cs-ba-icon {
  flex-shrink: 0; margin-top: 2px;
  font-size: 0.82rem; font-weight: 700;
  display: inline-block;
}
.cs-ba-icon--x {
  background: linear-gradient(135deg, #ff6b6b 0%, #e53935 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cs-ba-icon--check {
  background: linear-gradient(135deg, #4cda80 0%, #1db954 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Research Metrics ──────────────────────── */
.sp-rm-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 64px 0 72px;
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}

.sp-rm-card {
  padding: 44px 36px;
  text-align: center;
  border-right: 1px solid var(--border);
  /* only fade the card — no transform so overflow:hidden doesn't clip the slide */
  opacity: 0;
  transition: opacity 0.5s cubic-bezier(.16, 1, .3, 1);
}
.sp-rm-card:last-child { border-right: none; }
.sp-rm-card:nth-child(2) { transition-delay: 0.1s; }
.sp-rm-card:nth-child(3) { transition-delay: 0.2s; }

/* inner elements slide up independently */
.sp-rm-num,
.sp-rm-label,
.sp-rm-desc {
  transform: translateY(14px);
  transition: transform 0.65s cubic-bezier(.16, 1, .3, 1);
}
.sp-rm-label { transition-delay: 0.08s; }
.sp-rm-desc  { transition-delay: 0.14s; }

.sp-rm-card.sp-revealed {
  opacity: 1;
}
.sp-rm-card.sp-revealed .sp-rm-num,
.sp-rm-card.sp-revealed .sp-rm-label,
.sp-rm-card.sp-revealed .sp-rm-desc {
  transform: translateY(0);
}

.sp-rm-num {
  font-family: 'Satoshi', sans-serif;
  font-size: clamp(3rem, 5.5vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1;
  /* tabular-nums keeps each digit the same width → no layout shift during count-up */
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
  background: var(--btn-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 14px;
}

/* percentage sign slightly smaller so it feels tight */
.sp-rm-pct {
  font-size: 0.62em;
  letter-spacing: -0.01em;
  vertical-align: 0.06em;
}

.sp-rm-label {
  font-family: 'Satoshi', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.sp-rm-desc {
  font-family: 'Satoshi', sans-serif;
  font-size: 0.85rem;
  font-weight: 400;
  /* var(--text-3) ≈ #8090b0 — contrast ~4.6:1 on white, passes WCAG AA */
  color: var(--text-3);
  line-height: 1.6;
  max-width: 220px;
  margin: 0 auto;
}

/* tablet stacking */
@media (max-width: 768px) {
  .sp-rm-grid { grid-template-columns: 1fr; }
  .sp-rm-card {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 36px 28px;
  }
  .sp-rm-card:last-child { border-bottom: none; }
}

/* respect user motion preference */
@media (prefers-reduced-motion: reduce) {
  .sp-rm-card,
  .sp-rm-num,
  .sp-rm-label,
  .sp-rm-desc {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── Process Steps ─────────────────────────── */
.cs-process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  margin-top: 80px;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.cs-process-step {
  padding: 32px 28px;
  border-right: 1px solid var(--border);
  transition: background 0.25s;
}
.cs-process-step:last-child { border-right: none; }
.cs-process-step:hover { background: var(--bg-3); }
.cs-process-num {
  display: block;
  font-size: 0.65rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.cs-process-title {
  font-size: 1rem; font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 10px;
  color: var(--text);
}
.cs-process-tools {
  font-size: 0.82rem; color: var(--text-3);
  line-height: 1.65;
}

/* ── Pillars (Discovery) ───────────────────── */
.cs-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
/* 2-col variant (MC Challenge) — collapses to 1 col on tablet + mobile */
.cs-pillars--2col { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 899px) {
  .cs-pillars--2col { grid-template-columns: 1fr; }
}
.cs-pillar {
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg);
  transition: border-color 0.25s, background 0.25s;
}
.cs-pillar:hover { border-color: var(--border-hover); background: var(--bg-3); }
.cs-pillar-num {
  display: block;
  font-size: 2rem; font-weight: 900;
  letter-spacing: -0.05em;
  background: var(--btn-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px; line-height: 1;
}
.cs-pillar-num svg { display: block; }

.cs-pillar-cat {
  display: block;
  font-size: 0.65rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
.cs-pillar-title {
  font-size: 1.15rem; font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 12px;
  color: var(--text);
}
.cs-pillar-body {
  font-size: 0.95rem; color: var(--text-2);
  line-height: 1.78; margin-bottom: 24px;
}
.cs-pillar-link {
  font-size: 0.78rem; color: var(--accent);
  font-weight: 600; text-decoration: none;
  transition: opacity 0.2s;
}
.cs-pillar-link:hover { opacity: 0.7; }

/* ── Metrics Cards ─────────────────────────── */
.cs-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 56px;
}
/* 3-col variant (Product Outlook) — collapses to 1 col on tablet + mobile */
.cs-metrics--3col { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1024px) {
  .cs-metrics--3col { grid-template-columns: 1fr; }
}
.cs-metric-card {
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg);
  transition: border-color 0.25s, transform 0.3s var(--ease-out);
}
.cs-metric-card:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.cs-metric-num {
  display: block;
  font-size: 2rem; font-weight: 900;
  letter-spacing: -0.05em;
  background: var(--btn-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px; line-height: 1;
}
.cs-metric-title {
  font-size: 1rem; font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.cs-metric-row {
  display: flex; gap: 10px; align-items: baseline;
  font-size: 0.84rem; color: var(--text-2);
  line-height: 1.6; padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.cs-metric-row:last-child { border-bottom: none; padding-bottom: 0; }
.cs-metric-label {
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); flex-shrink: 0; min-width: 36px;
}

/* ── Lessons Grid ──────────────────────────── */
.cs-lessons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
/* 2-col variant (MC Lessons) — collapses to 1 col on tablet + mobile */
.cs-lessons--2col { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 899px) {
  .cs-lessons--2col { grid-template-columns: 1fr; }
}
.cs-lesson {
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg);
  transition: border-color 0.25s, background 0.25s;
}
.cs-lesson:hover { border-color: var(--border-hover); background: var(--bg-3); }
.cs-lesson-num {
  display: block;
  font-size: 2rem; font-weight: 900;
  letter-spacing: -0.05em;
  background: var(--btn-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px; line-height: 1;
}
.cs-lesson-num svg { display: block; }
.cs-lesson-title {
  font-size: 1.15rem; font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 12px;
  color: var(--text);
}
.cs-lesson-body {
  font-size: 0.95rem; color: var(--text-2); line-height: 1.78;
}

/* ── Links Grid ────────────────────────────── */
.cs-links-grid {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
  margin-top: 40px;
}
.cs-link-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  border: 1.5px solid var(--border);
  border-radius: 100px;
  font-size: 0.82rem; font-weight: 600;
  color: var(--text-2); cursor: none;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
  text-decoration: none;
}
.cs-link-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-3);
}

/* ── Bento Grid ────────────────────────────── */
/*
  Images in sequential order (Screen-01 → 06), alternating asymmetry:
  Row 1: Screen-01 --wide (span 2, 4:3) | Screen-02 --third (span 1, 4:3)
  Row 2: Screen-03 --third (span 1, 4:3) | Screen-04 --wide (span 2, 4:3)
  Row 3: Screen-05 --third (span 1, 4:3) | Screen-06 --wide (span 2, 4:3)
  All cells: aspect-ratio 4:3 — exact match to 960×720 source files.

  Videos in a separate section below:
  Happy-Flow | Error-Flow — aspect-ratio 9:17 (exact 440×830 source).
*/
.cs-bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 48px 40px 0;
  max-width: 800px;
  margin: 0 auto;
}

.cs-bento-item {
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg-2);
  position: relative;
  transform: translateZ(0);
  -webkit-mask-image: -webkit-radial-gradient(white, black);
}

/* Both variants = span 1 in a 2-col grid → perfect 50/50 */
.cs-bento-item--wide,
.cs-bento-item--third {
  grid-column: span 1;
  aspect-ratio: 4/3;
}

/* Media fill + smooth zoom on hover */
.cs-bento-item img,
.cs-bento-item video {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  will-change: transform;
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}
.cs-bento-item:hover img,
.cs-bento-item:hover video { transform: scale(1.05); }

/* ── Portrait Videos (separate row, exact 9:17 source ratio) ── */
.cs-bento-videos {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 40px;
  padding: 40px 40px 0;
  max-width: 800px;
  margin: 0 auto;
}

.cs-bento-video-item {
  width: min(300px, 80vw);
  aspect-ratio: 9/17;
  border-radius: 20px;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid rgba(120, 130, 155, 0.22);
  box-shadow: 0 4px 24px rgba(15, 37, 82, 0.06);
  flex-shrink: 0;
  transition: transform 0.65s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
  transform: translateZ(0);
  -webkit-mask-image: -webkit-radial-gradient(white, black);
}
.cs-bento-video-item:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 36px rgba(15, 37, 82, 0.12);
}

.cs-bento-video-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 320px;
}
.cs-bento-video-title {
  margin: 24px 0 0;
  font-size: 1.5rem; font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text);
  text-align: center;
  line-height: 1.2;
}
.cs-bento-video-label {
  margin: 8px 0 0;
  font-size: 0.92rem;
  font-weight: 400;
  color: var(--text-2);
  text-align: center;
  line-height: 1.55;
  letter-spacing: 0;
  max-width: 260px;
}

.cs-bento-video-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  margin: 0;
  background: #ffffff;            /* video bg matches placeholder/card bg */
}

/* ── Live button arrow rotation ─────────────── */
.cs-live-btn .btn-arrow svg {
  transition: transform 0.25s ease;
}
.cs-live-btn:hover .btn-arrow svg {
  transform: rotate(-45deg);
}

/* ── Responsive ────────────────────────────── */
@media (max-width: 1024px) {
  .cs-two-col, .cs-two-col--6040, .cs-two-col--4060 { gap: 48px; }
  .cs-process { grid-template-columns: repeat(2, 1fr); }
  .cs-process-step { border-bottom: 1px solid var(--border); }
  .cs-process-step:nth-child(2) { border-right: none; }
  .cs-lessons { grid-template-columns: repeat(2, 1fr); }
  .cs-pillars { grid-template-columns: repeat(2, 1fr); }
}

/* ── 960 px: collapse 2-col content before sidebar floats at 899px ── */
@media (max-width: 960px) {
  .cs-two-col,
  .cs-two-col--6040,
  .cs-two-col--4060 { grid-template-columns: 1fr; gap: 40px; }

  .cs-hero-body { grid-template-columns: 1fr; gap: 24px; }

  .cs-solution-row { grid-template-columns: 1fr; gap: 40px; }

  .cs-ba-row { grid-template-columns: 1fr; gap: 32px; }

  .cs-branding-row,
  .cs-branding-row--reverse { grid-template-columns: 1fr; }
  .cs-branding-row--reverse { direction: ltr; }
  .cs-branding-placeholder { aspect-ratio: 16/9; min-height: 200px; }

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

@media (max-width: 768px) {
  .cs-hero, .cs-section, .cs-testimonial { padding-left: 24px; padding-right: 24px; }
  .cs-hero { padding-top: 120px; }
  .cs-two-col, .cs-two-col--6040, .cs-two-col--4060 { grid-template-columns: 1fr; gap: 40px; }
  .cs-gallery-grid { grid-template-columns: 1fr 1fr; }
  .cs-gallery-item--wide { grid-column: span 2; }
  .cs-more-grid { grid-template-columns: 1fr; }
  .cs-ba-row { grid-template-columns: 1fr; }
  .cs-title { line-height: 1.0; }
  .cs-hero-body { grid-template-columns: 1fr; gap: 32px; }
  .cs-process { grid-template-columns: 1fr; }
  .cs-process-step { border-right: none; }
  .cs-pillars { grid-template-columns: 1fr; }
  .cs-metrics { grid-template-columns: 1fr; }
  .cs-lessons { grid-template-columns: 1fr; }
  .cs-bento-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 32px 20px 0;
  }
  /* Single column — each screen full width */
  .cs-bento-item--wide,
  .cs-bento-item--third { grid-column: span 1; }
  .cs-bento-videos { flex-direction: column; align-items: center; padding: 8px 20px 0; gap: 32px; }
  .cs-bento-video-item { width: 80%; max-width: 320px; }
  .cs-branding-row,
  .cs-branding-row--reverse { grid-template-columns: 1fr; }
  .cs-branding-placeholder { aspect-ratio: 16/9; min-height: 220px; }
}

/* ─────────────────────────────────────────────
   BRANDING STRATEGY & UI DECISIONS SECTION
   3 rows × 2 columns, alternating layout
───────────────────────────────────────────── */
.cs-branding-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 72px;
}
.cs-branding-intro {
  color: var(--text-2);
  line-height: 1.78;
  margin-top: 14px;
  font-size: 1rem;
  text-align: center;
}

/* Outer flex column */
.cs-branding-grid {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

/* Each row: 2-column grid */
.cs-branding-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

/* Reverse: flip col order so placeholder goes left */
.cs-branding-row--reverse {
  direction: rtl;
}
.cs-branding-row--reverse > * {
  direction: ltr;
}

/* Text side */
.cs-branding-eyebrow {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.cs-branding-title {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text);
  margin: 0 0 16px;
}
.cs-branding-body {
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--text-2);
  margin: 0;
}

/* Real image card */
.cs-branding-img-wrap {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(15, 37, 82, 0.1);
  box-shadow: 0 4px 24px rgba(15, 37, 82, 0.06);
  transition: box-shadow 0.3s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.cs-branding-img-wrap:hover {
  box-shadow: 0 10px 40px rgba(15, 37, 82, 0.12);
  transform: scale(1.015);
}
.cs-branding-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

/* Placeholder card */
.cs-branding-placeholder {
  aspect-ratio: 4/3;
  border-radius: 20px;
  background: linear-gradient(145deg, var(--bg-2) 0%, var(--bg-3) 100%);
  border: 1px solid rgba(15, 37, 82, 0.1);
  box-shadow: 0 4px 24px rgba(15, 37, 82, 0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.cs-branding-placeholder:hover {
  box-shadow: 0 8px 36px rgba(15, 37, 82, 0.09);
  border-color: rgba(29, 95, 204, 0.18);
}
.cs-branding-placeholder-icon {
  opacity: 0.35;
}
.cs-branding-placeholder-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  opacity: 0.6;
}