/* ============ USE CASES PAGE ============ */

/* ---------- HERO ---------- */
.uc-hero {
  position: relative;
  background: var(--charcoal-1);
  color: #fff;
  padding: 200px 0 100px;
  overflow: hidden;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.uc-hero__bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(circle at 85% 30%, rgba(53,92,132,0.32), transparent 55%),
    radial-gradient(circle at 10% 90%, rgba(53,92,132,0.18), transparent 45%);
}
.uc-hero__bg::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at 30% 40%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 30% 40%, black 0%, transparent 75%);
}
.uc-hero__inner {
  position: relative; z-index: 2;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 64px;
  align-items: end;
}
.uc-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.7);
  margin-bottom: 28px;
}
.uc-hero__eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(53,92,132,0.3);
}
.uc-hero__title {
  font-size: clamp(40px, 6vw, 84px);
  font-weight: 600;
  line-height: 1.0;
  letter-spacing: -0.025em;
  margin: 0 0 28px;
  text-wrap: balance;
}
.uc-hero__title-accent { color: var(--blue-soft); }
.uc-hero__lede {
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.6;
  color: rgba(255,255,255,0.72);
  max-width: 620px;
  margin: 0;
}
.uc-hero__meta {
  border-left: 1px solid rgba(255,255,255,0.12);
  padding-left: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.uc-hero__meta-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.uc-hero__meta-k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.45);
}
.uc-hero__meta-v {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #fff;
  letter-spacing: 0.04em;
}
.uc-hero__meta-v .num {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}
.uc-hero__meta-v .num span {
  font-size: 14px;
  color: var(--blue-soft);
  margin-left: 4px;
}
@media (max-width: 980px) {
  .uc-hero__inner { grid-template-columns: 1fr; }
  .uc-hero__meta { border-left: none; padding-left: 0; border-top: 1px solid rgba(255,255,255,0.12); padding-top: 28px; }
}

/* ---------- INDEX BAR ---------- */
.uc-index {
  background: #fff;
  border-bottom: 1px solid var(--gray-line);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255,255,255,0.94);
}
.uc-index__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px var(--pad);
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.uc-index__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  white-space: nowrap;
}
.uc-index__list {
  display: flex;
  gap: 4px;
  list-style: none;
  padding: 0; margin: 0;
  flex-wrap: wrap;
  flex: 1;
}
.uc-index__btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-mute);
  padding: 8px 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.uc-index__btn:hover { color: var(--charcoal-1); border-color: var(--gray-line); }
.uc-index__btn--active {
  color: var(--charcoal-1);
  border-color: var(--charcoal-1);
  background: var(--charcoal-1);
  color: #fff;
}
.uc-index__btn-num {
  font-weight: 600;
  letter-spacing: 0.08em;
}
.uc-index__btn-name {
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: 12px;
}
@media (max-width: 720px) {
  .uc-index__btn-name { display: none; }
}

/* ---------- CASES LIST ---------- */
.uc-list {
  background: var(--gray-paper);
  padding: 80px 0 120px;
}
.uc-list__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ---------- CASE CARD ---------- */
.case {
  background: #fff;
  border: 1px solid var(--gray-line);
  transition: border-color 0.3s, box-shadow 0.3s;
  scroll-margin-top: 96px;
}
.case:hover { border-color: var(--charcoal-2); }
.case--open {
  border-color: var(--charcoal-1);
  box-shadow: 0 30px 60px -30px rgba(20,23,27,0.25);
}

.case__head {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 32px;
  padding: 36px 40px;
  cursor: pointer;
  align-items: start;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  transition: background 0.2s;
}
.case__head:hover { background: var(--gray-paper); }
.case--open .case__head:hover { background: transparent; }

.case__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  padding-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.case__num strong {
  font-weight: 600;
  color: var(--charcoal-1);
  font-size: 14px;
}
.case--open .case__num strong { color: var(--accent); }

.case__body { min-width: 0; }
.case__type {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.case__title {
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.1;
  margin: 0 0 16px;
  text-wrap: balance;
  color: var(--charcoal-1);
}
.case__hook {
  font-size: 17px;
  line-height: 1.6;
  color: var(--charcoal-2);
  margin: 0 0 22px;
  max-width: 780px;
}
.case__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}
.case__quick-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 7px 12px;
  border: 1px solid var(--gray-line);
  color: var(--charcoal-2);
  background: var(--gray-paper);
}
.case__quick-pill strong {
  font-weight: 600;
  color: var(--charcoal-1);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: -0.01em;
  margin-right: 4px;
}

.case__toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--charcoal-1);
  white-space: nowrap;
}
.case__toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border: 1px solid var(--charcoal-1);
  transition: background 0.2s, color 0.2s, transform 0.3s;
}
.case__head:hover .case__toggle-icon { background: var(--charcoal-1); color: #fff; }
.case--open .case__toggle-icon {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.case--open .case__toggle-icon svg { transform: rotate(45deg); }
.case__toggle-icon svg { transition: transform 0.3s; }

/* ---------- EXPANDED CONTENT ---------- */
.case__detail {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
.case--open .case__detail { grid-template-rows: 1fr; }

.case__detail-inner {
  overflow: hidden;
  min-height: 0;
}

.case__detail-grid {
  border-top: 1px solid var(--gray-line);
  padding: 0 40px 40px;
}

.case__section {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--gray-line);
}
.case__section:last-child { border-bottom: none; }

.case__section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  padding-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.case__section-label strong {
  display: block;
  font-weight: 600;
  color: var(--charcoal-1);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.case__section-body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--charcoal-2);
}
.case__section-body p {
  margin: 0 0 14px;
}
.case__section-body p:last-child { margin-bottom: 0; }
.case__section-body strong {
  color: var(--charcoal-1);
  font-weight: 600;
}

/* spec list (camera package, etc.) */
.case__spec-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--gray-line);
}
.case__spec-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-line);
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 15px;
  color: var(--charcoal-2);
}
.case__spec-list li::before {
  content: '+';
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}
@media (max-width: 720px) {
  .case__spec-list { grid-template-columns: 1fr; }
}

/* bullet list */
.case__bullets {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}
.case__bullets li {
  padding: 10px 0 10px 24px;
  position: relative;
  border-bottom: 1px dashed var(--gray-line);
  font-size: 16px;
  color: var(--charcoal-2);
  line-height: 1.55;
}
.case__bullets li:last-child { border-bottom: none; }
.case__bullets li::before {
  content: '';
  position: absolute;
  left: 0; top: 19px;
  width: 12px; height: 1px;
  background: var(--accent);
}

/* impact stat grid for results */
.case__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--charcoal-1);
  background: var(--charcoal-1);
  color: #fff;
  margin-top: 12px;
}
.case__stat {
  padding: 24px 22px;
  background: var(--charcoal-1);
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.case__stat:last-child { border-right: none; }
.case__stat-num {
  font-family: var(--font-sans);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}
.case__stat-num span {
  font-size: 16px;
  color: var(--blue-soft);
  margin-left: 2px;
}
.case__stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(255,255,255,0.6);
  line-height: 1.4;
}
@media (max-width: 720px) {
  .case__stats { grid-template-columns: 1fr; }
  .case__stat { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .case__stat:last-child { border-bottom: none; }
}

/* confidentiality */
.case__confidential {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--gray-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  display: flex;
  align-items: center;
  gap: 10px;
}
.case__confidential::before {
  content: '';
  width: 8px; height: 8px;
  border: 1px solid var(--ink-mute);
}

/* close at bottom of expanded card */
.case__close-row {
  display: flex;
  justify-content: flex-end;
  padding: 20px 0 0;
}
.case__close {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  border: 1px solid var(--gray-line);
  padding: 10px 16px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--charcoal-2);
  transition: border-color 0.2s, color 0.2s;
}
.case__close:hover { border-color: var(--charcoal-1); color: var(--charcoal-1); }

@media (max-width: 880px) {
  .case__head { grid-template-columns: 1fr; gap: 12px; padding: 28px; }
  .case__toggle { justify-self: start; padding-top: 4px; }
  .case__num { padding-top: 0; flex-direction: row; gap: 12px; }
  .case__detail-grid { padding: 0 28px 28px; }
  .case__section { grid-template-columns: 1fr; gap: 12px; padding: 24px 0; }
}

/* ---------- CTA STRIP ---------- */
.uc-cta {
  position: relative;
  background: var(--gray-paper);
  color: var(--charcoal-1);
  padding: 110px 0;
  overflow: hidden;
  border-top: 1px solid var(--gray-line);
  border-bottom: 1px solid var(--gray-line);
}
.uc-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--gray-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--gray-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 80% 30%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 80% 30%, black 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}
.uc-cta::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 30%, rgba(53,92,132,0.12), transparent 55%),
    radial-gradient(circle at 10% 90%, rgba(53,92,132,0.06), transparent 50%);
  pointer-events: none;
}
.uc-cta__inner {
  position: relative;
  z-index: 2;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: center;
}
.uc-cta__title {
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 16px 0 0;
  text-wrap: balance;
}
.uc-cta__lede {
  font-size: 16px;
  line-height: 1.6;
  color: var(--charcoal-2);
  margin: 0 0 24px;
}
.uc-cta__buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
@media (max-width: 880px) {
  .uc-cta__inner { grid-template-columns: 1fr; gap: 28px; }
}