/* ====== CASE STUDY PAGES ====== */

/* Scroll progress bar */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1001;
  height: 3px; background: transparent;
}
.scroll-progress-bar {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--green), var(--lavender));
  transition: width 0.1s linear;
}

/* Case nav */
.case-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10, 15, 46, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  opacity: 0; transform: translateY(-100%);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.case-nav.visible { opacity: 1; transform: translateY(0); }
.case-nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center;
}
.case-nav .back-link {
  font-size: 14px; color: var(--grey); text-decoration: none;
  display: flex; align-items: center; gap: 6px;
  transition: color 0.3s;
}
.case-nav .back-link:hover { color: var(--green); }

/* Full viewport hero */
.cs-hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #0A0F2E 0%, #1A1B5D 50%, #0A0F2E 100%);
  position: relative; overflow: hidden; text-align: center;
}
.cs-hero::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
}
.cs-hero::after {
  content: ''; position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,212,126,0.08) 0%, transparent 70%);
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  pointer-events: none;
}
.cs-hero-inner {
  position: relative; z-index: 1;
  max-width: 900px; padding: 0 24px;
}
.cs-hero .cs-label {
  display: inline-block; font-size: 12px; font-weight: 700;
  letter-spacing: 4px; text-transform: uppercase;
  color: var(--green); margin-bottom: 32px;
  opacity: 0; transform: translateY(20px);
  animation: csFadeUp 0.8s ease 0.2s forwards;
}
.cs-hero .cs-company {
  font-size: clamp(14px, 2vw, 18px); color: var(--grey);
  font-weight: 500; margin-bottom: 20px;
  opacity: 0; transform: translateY(20px);
  animation: csFadeUp 0.8s ease 0.4s forwards;
}
.cs-hero h1 {
  font-size: clamp(32px, 6vw, 72px); font-weight: 800;
  line-height: 1.05; margin-bottom: 32px;
  opacity: 0; transform: translateY(30px);
  animation: csFadeUp 0.8s ease 0.6s forwards;
}
.cs-hero h1 em { font-style: normal; color: var(--green); }
.cs-hero .cs-meta {
  display: flex; gap: 28px; justify-content: center; flex-wrap: wrap;
  padding-top: 32px; border-top: 1px solid var(--border);
  opacity: 0; transform: translateY(20px);
  animation: csFadeUp 0.8s ease 0.8s forwards;
}
.cs-hero .cs-meta span {
  font-size: 14px; color: var(--grey);
  display: flex; align-items: center; gap: 8px;
}
.cs-hero .cs-meta span::before {
  content: ''; width: 5px; height: 5px;
  background: var(--green); border-radius: 50%;
}
.cs-scroll-hint {
  position: absolute; bottom: 40px; left: 50%;
  transform: translateX(-50%); z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  opacity: 0; animation: csFadeUp 0.8s ease 1.2s forwards;
}
.cs-scroll-hint span {
  font-size: 11px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--grey);
}
.cs-scroll-hint .scroll-line {
  width: 1px; height: 40px; background: var(--border);
  position: relative; overflow: hidden;
}
.cs-scroll-hint .scroll-line::after {
  content: ''; position: absolute; top: -40px; left: 0;
  width: 100%; height: 40px; background: var(--green);
  animation: scrollDown 1.8s ease infinite;
}

@keyframes scrollDown {
  0% { top: -40px; }
  50% { top: 40px; }
  100% { top: 40px; }
}

@keyframes csFadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Stats showcase - full viewport */
.cs-stats-section {
  min-height: 100vh; display: flex; align-items: center;
  background: var(--bg); position: relative;
  overflow: hidden;
}
.cs-stats-section::before {
  content: ''; position: absolute;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(0,212,126,0.04) 0%, transparent 60%);
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  pointer-events: none;
}
.cs-stats-inner {
  position: relative; z-index: 1;
  width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px;
}
.cs-stats-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px;
  text-align: center;
}
.cs-stat {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.cs-stat.show { opacity: 1; transform: translateY(0); }
.cs-stat .cs-num {
  font-size: clamp(48px, 8vw, 96px); font-weight: 800;
  line-height: 1; margin-bottom: 8px;
}
.cs-stat .cs-num .unit { color: var(--green); }
.cs-stat .cs-desc {
  font-size: 16px; color: var(--grey); font-weight: 500;
}

/* Story sections */
.cs-story {
  padding: 120px 0; position: relative;
}
.cs-story.bg-alt { background: var(--bg2); }
.cs-story-inner {
  max-width: 720px; margin: 0 auto; padding: 0 24px;
}
.cs-story .cs-chapter {
  font-size: 12px; font-weight: 700; letter-spacing: 4px;
  text-transform: uppercase; color: var(--green); margin-bottom: 24px;
  display: flex; align-items: center; gap: 16px;
}
.cs-story .cs-chapter::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(90deg, rgba(0,212,126,0.3), transparent);
}
.cs-story h2 {
  font-size: clamp(28px, 4vw, 44px); font-weight: 800;
  line-height: 1.15; margin-bottom: 32px;
}
.cs-story h2 em { font-style: normal; color: var(--green); }
.cs-story p {
  color: var(--grey); font-size: 18px; line-height: 1.85;
  margin-bottom: 20px;
}
.cs-story p:last-child { margin-bottom: 0; }

/* Before/After contrast */
.cs-contrast {
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px;
  margin: 48px 0;
}
.cs-contrast-card {
  border-radius: 16px; padding: 32px;
}
.cs-contrast-card.before {
  background: rgba(255, 77, 77, 0.04);
  border: 1px solid rgba(255, 77, 77, 0.12);
}
.cs-contrast-card.after {
  background: rgba(0, 212, 126, 0.04);
  border: 1px solid rgba(0, 212, 126, 0.15);
}
.cs-contrast-card h3 {
  font-size: 14px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; margin-bottom: 20px;
}
.cs-contrast-card.before h3 { color: var(--red); }
.cs-contrast-card.after h3 { color: var(--green); }
.cs-contrast-card ul {
  list-style: none; display: flex; flex-direction: column; gap: 12px;
}
.cs-contrast-card li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 15px; color: var(--grey); line-height: 1.6;
}
.cs-contrast-card .mark { flex-shrink: 0; font-weight: 700; font-size: 16px; }
.cs-contrast-card.before .mark { color: var(--red); }
.cs-contrast-card.after .mark { color: var(--green); }

/* Quote section */
.cs-quote-section {
  padding: 120px 0;
  background: linear-gradient(135deg, #0A0F2E 0%, #1A1B5D 50%, #0A0F2E 100%);
  position: relative; text-align: center;
}
.cs-quote-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0,212,126,0.06) 0%, transparent 50%);
}
.cs-quote-inner {
  position: relative; z-index: 1;
  max-width: 760px; margin: 0 auto; padding: 0 24px;
}
.cs-quote-mark {
  font-size: 120px; font-family: Georgia, serif;
  color: var(--green); opacity: 0.2; line-height: 0.5;
  margin-bottom: 24px;
}
.cs-quote-inner blockquote {
  font-size: clamp(18px, 2.5vw, 24px); line-height: 1.7;
  color: var(--white); font-style: italic; font-weight: 500;
  margin-bottom: 40px;
}
.cs-quote-author {
  display: flex; align-items: center; gap: 16px;
  justify-content: center;
}
.cs-quote-author .av {
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--lavender));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px; color: #000;
}
.cs-quote-author .nm { font-weight: 700; font-size: 16px; }
.cs-quote-author .rl { color: var(--grey); font-size: 14px; }

/* Final CTA */
.cs-final-cta {
  padding: 120px 0; text-align: center;
  background: var(--bg); position: relative;
}
.cs-final-cta h2 {
  font-size: clamp(24px, 4vw, 40px); font-weight: 800;
  margin-bottom: 16px;
}
.cs-final-cta p {
  color: var(--grey); font-size: 18px; margin-bottom: 40px;
  max-width: 560px; margin-left: auto; margin-right: auto;
}

/* Other case studies row */
.cs-others {
  padding: 80px 0; background: var(--bg2);
  border-top: 1px solid var(--border);
}
.cs-others h3 {
  font-size: 14px; font-weight: 700; letter-spacing: 3px;
  text-transform: uppercase; color: var(--green); margin-bottom: 32px;
  text-align: center;
}
.cs-others-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  max-width: 800px; margin: 0 auto;
}
.cs-other-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 28px;
  text-decoration: none; color: var(--white);
  transition: border-color 0.3s, transform 0.3s;
  display: flex; flex-direction: column;
}
.cs-other-card:hover { border-color: rgba(0,212,126,0.2); transform: translateY(-2px); }
.cs-other-card .other-name { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.cs-other-card .other-type { font-size: 13px; color: var(--grey); margin-bottom: 16px; }
.cs-other-card .other-stat {
  font-size: 14px; color: var(--green); font-weight: 700;
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .cs-stats-grid { grid-template-columns: 1fr; gap: 48px; }
  .cs-contrast { grid-template-columns: 1fr; }
  .cs-others-grid { grid-template-columns: 1fr; }
  .cs-hero .cs-meta { flex-direction: column; align-items: center; gap: 12px; }
  .cs-scroll-hint { display: none; }
}