/* ═══════════════════════════════════════════════════════
   CASE STUDIES — RETRO-FUTURISTIC THEME
   Uses shared variables from retro-theme.css (--rt-*).
   Page-scoped via .cs-retro body class.
   ═══════════════════════════════════════════════════════ */

/* ── Page-scoped overrides ────────────────────────────── */
.cs-retro {
  --cs-font-display: var(--rt-font-display);
  --cs-font-mono: var(--rt-font-mono);
  --cs-font-body: var(--rt-font-body);
}

/* ── Base Reset for Page ──────────────────────────────── */
.cs-retro {
  background: var(--rt-void);
  color: var(--rt-text);
  overflow-x: hidden;
}

/* ── Animated Grid Background ─────────────────────────── */
.cs-grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--rt-neon-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--rt-neon-faint) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: cs-grid-drift 20s linear infinite;
}
.cs-grid-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--rt-neon-soft) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, var(--rt-cyan-soft) 0%, transparent 50%);
}
@keyframes cs-grid-drift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

/* ── Scanline Overlay ─────────────────────────────────── */
.cs-scanlines {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}

/* ── Content Wrapper ──────────────────────────────────── */
.cs-content {
  position: relative;
  z-index: 2;
}

/* ══════════════════════════════════════════════════════
   HERO SECTION
   ══════════════════════════════════════════════════════ */
.cs-hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  text-align: center;
  background: linear-gradient(180deg, var(--rt-void) 0%, var(--rt-deep) 100%);
}

/* Horizon line glow at bottom */
.cs-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 5%;
  right: 5%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--rt-neon), transparent);
  box-shadow: var(--rt-glow-neon);
}

/* Floating geometric accents */
.cs-hero-geo {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.cs-hero-geo .geo-ring {
  position: absolute;
  border: 1px solid var(--rt-neon-soft);
  border-radius: 50%;
  animation: cs-ring-pulse 6s ease-in-out infinite;
}
.cs-hero-geo .geo-ring:nth-child(1) {
  width: 400px; height: 400px;
  top: -100px; right: -80px;
  animation-delay: 0s;
}
.cs-hero-geo .geo-ring:nth-child(2) {
  width: 250px; height: 250px;
  bottom: -50px; left: -60px;
  border-color: var(--rt-cyan-soft);
  animation-delay: 2s;
}
.cs-hero-geo .geo-ring:nth-child(3) {
  width: 150px; height: 150px;
  top: 30%; left: 10%;
  animation-delay: 4s;
}
@keyframes cs-ring-pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.05); }
}

/* Hero tag line */
.cs-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--cs-font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--rt-neon);
  margin-bottom: 30px;
  padding: 8px 20px;
  border: 1px solid var(--rt-border-neon);
  background: var(--rt-neon-faint);
}
.cs-hero-tag .tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--rt-neon);
  animation: cs-blink 2s infinite;
}
@keyframes cs-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

/* Hero title */
.cs-hero-title {
  font-family: var(--cs-font-display);
  font-size: clamp(32px, 5vw, 62px);
  font-weight: 700;
  color: var(--rt-text-bright);
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}
.cs-hero-title .highlight {
  background: linear-gradient(135deg, var(--rt-neon), var(--rt-neon-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Hero description */
.cs-hero-desc {
  font-family: var(--cs-font-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--rt-text-dim);
  max-width: 600px;
  margin: 0 auto;
}

/* ══════════════════════════════════════════════════════
   STATS / DATA READOUT SECTION
   ══════════════════════════════════════════════════════ */
.cs-stats {
  position: relative;
  padding: 60px 0;
  background: var(--rt-deep);
  border-top: 1px solid var(--rt-neon-faint);
  border-bottom: 1px solid var(--rt-neon-faint);
}

.cs-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.cs-stat-cell {
  position: relative;
  padding: 40px 30px;
  text-align: center;
  border-right: 1px solid var(--rt-neon-faint);
}
.cs-stat-cell:last-child {
  border-right: none;
}

/* Corner brackets decoration */
.cs-stat-cell::before,
.cs-stat-cell::after {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--rt-neon);
  opacity: 0.3;
}
.cs-stat-cell::before {
  top: 15px;
  left: 15px;
  border-top: 1px solid;
  border-left: 1px solid;
}
.cs-stat-cell::after {
  bottom: 15px;
  right: 15px;
  border-bottom: 1px solid;
  border-right: 1px solid;
}

.cs-stat-label {
  font-family: var(--cs-font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--rt-text-dim);
  margin-bottom: 12px;
}

.cs-stat-value {
  font-family: var(--cs-font-display);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  color: var(--rt-text-bright);
  line-height: 1;
  margin-bottom: 10px;
}
.cs-stat-value .neon {
  color: var(--rt-neon);
  text-shadow: 0 0 10px var(--rt-neon-glow);
}

.cs-stat-sub {
  font-family: var(--cs-font-body);
  font-size: 14px;
  color: var(--rt-text-dim);
  line-height: 1.5;
}

/* ══════════════════════════════════════════════════════
   CASE STUDY CARDS — ENHANCED
   ══════════════════════════════════════════════════════ */

/* ── Per-card accent colors ──────────────────────── */
.cs-accent-emerald { --card-accent: #00e676; --card-glow: rgba(0, 230, 118, 0.35); --card-glow-soft: rgba(0, 230, 118, 0.08); }
.cs-accent-crimson { --card-accent: #ff1744; --card-glow: rgba(255, 23, 68, 0.35); --card-glow-soft: rgba(255, 23, 68, 0.08); }
.cs-accent-amber   { --card-accent: #ffab00; --card-glow: rgba(255, 171, 0, 0.35); --card-glow-soft: rgba(255, 171, 0, 0.08); }

.cs-cases {
  padding: 100px 0;
  position: relative;
}

.cs-case-item {
  margin-bottom: 100px;
  position: relative;
}
.cs-case-item:last-child {
  margin-bottom: 0;
}

/* ── Main Card Container ─────────────────────────── */
.cs-case-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 560px;
  background: linear-gradient(135deg, var(--rt-surface) 0%, var(--rt-surface-2) 100%);
  border: 1px solid var(--rt-border);
  position: relative;
  overflow: hidden;
  transition: border-color 0.5s ease, box-shadow 0.5s ease, transform 0.5s var(--rt-ease);
}
.cs-case-card:hover {
  border-color: var(--card-accent);
  box-shadow:
    0 0 30px var(--card-glow-soft),
    0 0 80px var(--card-glow-soft),
    0 30px 60px rgba(0, 0, 0, 0.4),
    inset 0 0 60px var(--card-glow-soft);
  transform: translateY(-4px);
}

/* Giant ghost number background */
.cs-case-card::before {
  content: attr(data-num);
  position: absolute;
  top: -30px;
  right: -10px;
  font-family: var(--cs-font-display);
  font-size: 220px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.03);
  z-index: 0;
  line-height: 1;
  pointer-events: none;
  transition: -webkit-text-stroke 0.4s ease;
}
.cs-case-card:hover::before {
  -webkit-text-stroke: 1px var(--card-glow-soft);
}

/* File ID label */
.cs-case-card::after {
  content: attr(data-file);
  position: absolute;
  top: 20px;
  right: 24px;
  font-family: var(--cs-font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.12);
  z-index: 6;
  transition: color 0.3s ease;
}
.cs-case-card:hover::after {
  color: var(--card-accent);
}

/* Reverse layout for alternating cards */
.cs-case-item:nth-child(even) .cs-case-card {
  direction: rtl;
}
.cs-case-item:nth-child(even) .cs-case-card > * {
  direction: ltr;
}

/* ── HUD Corner Brackets ─────────────────────────── */
.cs-corner {
  position: absolute;
  width: 24px;
  height: 24px;
  z-index: 6;
  pointer-events: none;
  transition: border-color 0.4s ease, opacity 0.4s ease;
  opacity: 0.2;
}
.cs-case-card:hover .cs-corner {
  border-color: var(--card-accent) !important;
  opacity: 0.8;
}
.cs-corner-tl { top: 12px; left: 12px; border-top: 2px solid var(--rt-neon); border-left: 2px solid var(--rt-neon); }
.cs-corner-tr { top: 12px; right: 12px; border-top: 2px solid var(--rt-neon); border-right: 2px solid var(--rt-neon); }
.cs-corner-bl { bottom: 12px; left: 12px; border-bottom: 2px solid var(--rt-neon); border-left: 2px solid var(--rt-neon); }
.cs-corner-br { bottom: 12px; right: 12px; border-bottom: 2px solid var(--rt-neon); border-right: 2px solid var(--rt-neon); }

/* ── Scanning Line ────────────────────────────────── */
.cs-scan-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--card-accent), transparent);
  opacity: 0;
  z-index: 7;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.cs-case-card:hover .cs-scan-line {
  opacity: 0.6;
  animation: cs-scan-sweep 2s ease-in-out infinite;
}
@keyframes cs-scan-sweep {
  0% { top: 0; }
  100% { top: 100%; }
}

/* ── Card Info Panel ─────────────────────────────── */
.cs-case-info {
  padding: 55px 50px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 3;
}

/* Vertical accent bar */
.cs-case-info::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15%;
  bottom: 15%;
  width: 3px;
  background: linear-gradient(180deg, transparent, var(--card-accent), transparent);
  opacity: 0.3;
  transition: opacity 0.4s ease, box-shadow 0.4s ease;
}
.cs-case-card:hover .cs-case-info::before {
  opacity: 1;
  box-shadow: 0 0 12px var(--card-glow);
}

/* Transmission index with pulsing dot */
.cs-case-index {
  font-family: var(--cs-font-mono);
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--card-accent);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.cs-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--card-accent);
  box-shadow: 0 0 6px var(--card-glow);
  animation: cs-blink 1.5s infinite;
  flex-shrink: 0;
}

/* Industry tag */
.cs-case-industry {
  font-family: var(--cs-font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--rt-text-dim);
  margin-bottom: 22px;
  padding: 6px 14px;
  border: 1px solid var(--rt-border);
  display: inline-block;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.3s ease, color 0.3s ease;
}
.cs-case-card:hover .cs-case-industry {
  border-color: var(--card-glow-soft);
  color: var(--rt-text);
}

/* Title with subtle glow on hover */
.cs-case-title {
  font-family: var(--cs-font-display);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 700;
  color: var(--rt-text-bright);
  line-height: 1.15;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
  transition: text-shadow 0.4s ease;
}
.cs-case-card:hover .cs-case-title {
  text-shadow: 0 0 30px var(--card-glow-soft);
}

.cs-case-tagline {
  font-family: var(--cs-font-body);
  font-size: 17px;
  color: var(--rt-text-dim);
  margin-bottom: 18px;
  font-style: italic;
}

.cs-case-desc {
  font-family: var(--cs-font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--rt-text);
  margin-bottom: 24px;
  max-width: 440px;
}

/* Tech stack tags */
.cs-case-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.cs-tech-tag {
  font-family: var(--cs-font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--rt-text-dim);
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--rt-border);
  transition: border-color 0.3s ease, color 0.3s ease, background 0.3s ease;
}
.cs-case-card:hover .cs-tech-tag {
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--rt-text);
  background: rgba(255, 255, 255, 0.04);
}

/* CTA Button — uses card accent color */
.cs-case-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--cs-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--card-accent);
  padding: 14px 28px;
  border: 1px solid var(--card-accent);
  background: transparent;
  position: relative;
  overflow: hidden;
  transition: color 0.3s ease, box-shadow 0.3s ease;
}
.cs-case-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--card-accent);
  transform: translateX(-101%);
  transition: transform 0.35s var(--rt-ease);
}
.cs-case-btn:hover {
  color: var(--rt-void);
  text-decoration: none;
  box-shadow: 0 0 20px var(--card-glow-soft);
}
.cs-case-btn:hover::before {
  transform: translateX(0);
}
.cs-case-btn span {
  position: relative;
  z-index: 1;
}
.cs-case-btn .btn-arrow {
  position: relative;
  z-index: 1;
  transition: transform 0.3s ease;
}
.cs-case-btn:hover .btn-arrow {
  transform: translateX(5px);
}

/* ── Card Image Panel ────────────────────────────── */
.cs-case-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 50px 40px 60px;
  overflow: hidden;
}

/* Colored background wash */
.cs-case-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.06;
  transition: opacity 0.5s ease;
}
.cs-case-card:hover .cs-case-visual::before {
  opacity: 0.12;
}
.cs-case-visual[data-color="green"]::before  { background: radial-gradient(ellipse at center, #00e676, transparent 70%); }
.cs-case-visual[data-color="red"]::before    { background: radial-gradient(ellipse at center, #ff1744, transparent 70%); }
.cs-case-visual[data-color="orange"]::before { background: radial-gradient(ellipse at center, #ffab00, transparent 70%); }

/* Grid pattern */
.cs-case-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

/* Neon image frame */
.cs-case-img-frame {
  position: relative;
  z-index: 2;
  max-width: 85%;
  padding: 3px;
  background: linear-gradient(135deg, var(--card-accent), transparent 40%, transparent 60%, var(--card-accent));
  opacity: 1;
  transition: box-shadow 0.5s ease;
}
.cs-case-card:hover .cs-case-img-frame {
  box-shadow: 0 0 20px var(--card-glow-soft), 0 0 60px var(--card-glow-soft);
}

.cs-case-img-wrap {
  position: relative;
  background: var(--rt-surface);
  overflow: hidden;
  transition: transform 0.6s var(--rt-ease);
}
.cs-case-card:hover .cs-case-img-wrap {
  transform: scale(1.02);
}

.cs-case-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
  transition: filter 0.4s ease;
}
.cs-case-card:hover .cs-case-img-wrap img {
  filter: brightness(1.05) contrast(1.05);
}

/* HUD readout strip below image */
.cs-visual-hud {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 5;
  font-family: var(--cs-font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--rt-text-dim);
  padding: 6px 16px;
  background: rgba(6, 6, 14, 0.7);
  border: 1px solid var(--rt-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  white-space: nowrap;
  transition: border-color 0.3s ease;
}
.cs-case-card:hover .cs-visual-hud {
  border-color: var(--card-glow-soft);
}
.cs-hud-item {
  display: flex;
  align-items: center;
  gap: 5px;
}
.cs-hud-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--rt-text-dim);
}
.cs-hud-dot.active {
  background: var(--card-accent);
  box-shadow: 0 0 6px var(--card-glow);
  animation: cs-blink 1.2s infinite;
}

/* ══════════════════════════════════════════════════════
   SECTION DIVIDER
   ══════════════════════════════════════════════════════ */
.cs-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--rt-neon), transparent);
  opacity: 0.15;
  margin: 0 auto;
  max-width: 80%;
}

/* ══════════════════════════════════════════════════════
   ANIMATIONS & REVEALS
   ══════════════════════════════════════════════════════ */
.cs-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--rt-ease),
              transform 0.8s var(--rt-ease);
}
.cs-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.cs-reveal-delay-1 { transition-delay: 0.1s; }
.cs-reveal-delay-2 { transition-delay: 0.2s; }
.cs-reveal-delay-3 { transition-delay: 0.3s; }

/* Glitch effect on hero title */
@keyframes cs-glitch {
  0%, 100% { clip-path: inset(0 0 0 0); transform: translate(0); }
  20% { clip-path: inset(20% 0 60% 0); transform: translate(-2px, 1px); }
  40% { clip-path: inset(60% 0 10% 0); transform: translate(2px, -1px); }
  60% { clip-path: inset(40% 0 30% 0); transform: translate(-1px, 2px); }
  80% { clip-path: inset(10% 0 80% 0); transform: translate(1px, -2px); }
}
.cs-glitch-hover:hover {
  animation: cs-glitch 0.3s linear;
}

/* Neon flicker for stat values */
@keyframes cs-neon-flicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% { opacity: 1; }
  20%, 24%, 55% { opacity: 0.6; }
}
.cs-stat-value .neon {
  animation: cs-neon-flicker 4s infinite;
}

/* ══════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════ */
@media (max-width: 992px) {
  .cs-case-card {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .cs-case-item:nth-child(even) .cs-case-card {
    direction: ltr;
  }
  .cs-case-visual {
    min-height: 350px;
    order: -1;
  }
  .cs-case-info {
    padding: 40px 30px;
  }
  .cs-hero {
    padding: 130px 0 70px;
  }
  .cs-case-card::before {
    font-size: 140px;
    top: -20px;
    right: -5px;
  }
}

@media (max-width: 768px) {
  .cs-stats-grid {
    grid-template-columns: 1fr;
  }
  .cs-stat-cell {
    border-right: none;
    border-bottom: 1px solid var(--rt-neon-faint);
    padding: 30px 20px;
  }
  .cs-stat-cell:last-child {
    border-bottom: none;
  }
  .cs-case-info {
    padding: 30px 24px;
  }
  .cs-case-visual {
    min-height: 280px;
    padding: 30px 20px 50px;
  }
  .cs-cases {
    padding: 60px 0;
  }
  .cs-case-item {
    margin-bottom: 60px;
  }
  .cs-case-desc {
    max-width: 100%;
  }
  .cs-hero-title {
    font-size: clamp(26px, 7vw, 42px);
  }
  .cs-case-card::before {
    font-size: 100px;
    top: -10px;
  }
  .cs-corner {
    width: 16px;
    height: 16px;
  }
  .cs-case-img-frame {
    max-width: 90%;
  }
  .cs-visual-hud {
    font-size: 8px;
    gap: 10px;
    padding: 5px 12px;
  }
}

@media (max-width: 480px) {
  .cs-hero {
    padding: 110px 0 50px;
  }
  .cs-hero-tag {
    font-size: 10px;
    letter-spacing: 2px;
  }
  .cs-case-btn {
    width: 100%;
    justify-content: center;
  }
  .cs-case-tech {
    gap: 6px;
  }
  .cs-tech-tag {
    font-size: 9px;
    padding: 3px 8px;
  }
  .cs-case-card::before {
    font-size: 80px;
  }
}