/* ══════════════════════════════════════════════════════════════
   case-study.css – Modern Project Case Study Architecture
   Sleek Obsidian Dark Mode (Default) + Crisp Glass Light Mode
   Bento Grids, Architecture Flowcards, Tech Badges, Stats Deck
   ══════════════════════════════════════════════════════════════ */

:root {
  /* Dark Theme (Default) */
  --case-bg: #070b14;
  --case-bg-secondary: #0c1220;
  --case-paper: rgba(14, 22, 38, 0.75);
  --case-paper-solid: #0e1626;
  --case-paper-hover: rgba(20, 32, 56, 0.9);
  --case-ink: #f8fafc;
  --case-ink-secondary: #cbd5e1;
  --case-muted: #8e9cb2;
  --case-line: rgba(255, 255, 255, 0.08);
  --case-line-hover: rgba(56, 189, 248, 0.35);

  --case-cyan: #06b6d4;
  --case-cyan-glow: rgba(6, 182, 212, 0.25);
  --case-blue: #38bdf8;
  --case-purple: #818cf8;
  --case-emerald: #10b981;
  --case-amber: #f59e0b;

  --case-radius-sm: 8px;
  --case-radius-md: 14px;
  --case-radius-lg: 20px;
  --case-radius-full: 9999px;

  --case-shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --case-shadow-md: 0 12px 32px -8px rgba(0, 0, 0, 0.45);
  --case-shadow-lg: 0 24px 60px -12px rgba(0, 0, 0, 0.6);
}

[data-theme="light"] {
  --case-bg: #f8fafc;
  --case-bg-secondary: #f1f5f9;
  --case-paper: rgba(255, 255, 255, 0.85);
  --case-paper-solid: #ffffff;
  --case-paper-hover: #ffffff;
  --case-ink: #0f172a;
  --case-ink-secondary: #334155;
  --case-muted: #64748b;
  --case-line: rgba(15, 23, 42, 0.09);
  --case-line-hover: rgba(2, 132, 199, 0.35);

  --case-cyan: #0891b2;
  --case-cyan-glow: rgba(8, 145, 178, 0.15);
  --case-blue: #0284c7;
  --case-purple: #6366f1;
  --case-emerald: #059669;
  --case-amber: #d97706;

  --case-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --case-shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --case-shadow-lg: 0 20px 45px -10px rgba(15, 23, 42, 0.12);
}

body.case-study-page {
  background-color: var(--case-bg);
  color: var(--case-ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.7;
  margin: 0;
  overflow-x: hidden;
  position: relative;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Ambient Radial Mesh Lighting */
body.case-study-page::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background:
    radial-gradient(ellipse 60% 45% at 20% 12%, rgba(6, 182, 212, 0.12), transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 25%, rgba(129, 140, 248, 0.1), transparent 70%);
}

[data-theme="light"] body.case-study-page::before {
  background:
    radial-gradient(ellipse 60% 45% at 20% 12%, rgba(56, 189, 248, 0.08), transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 25%, rgba(99, 102, 241, 0.06), transparent 70%);
}

/* Tech Grid */
body.case-study-page::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image: 
    linear-gradient(to right, var(--case-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--case-line) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(circle at center, black 40%, transparent 85%);
  mask-image: radial-gradient(circle at center, black 40%, transparent 85%);
  opacity: 0.7;
}

/* Navbar & Theme Toggle for Case Studies */
.case-study-page .floating-nav {
  background: var(--case-paper) !important;
  backdrop-filter: blur(20px) !important;
  -webkit-backdrop-filter: blur(20px) !important;
  border: 1px solid var(--case-line) !important;
  box-shadow: var(--case-shadow-md) !important;
}

.case-study-page .nav-link {
  color: var(--case-muted) !important;
  font-weight: 500;
  transition: color 0.2s ease;
}

.case-study-page .nav-link:hover,
.case-study-page .nav-link.active {
  color: var(--case-ink) !important;
}

.case-study-page .nav-indicator {
  background: var(--case-line) !important;
}

.case-study-page .nav-logo {
  color: var(--case-cyan) !important;
}

.case-study-page .nav-resume-btn {
  background: linear-gradient(135deg, var(--case-cyan), var(--case-blue)) !important;
  color: #04101e !important;
  font-weight: 700 !important;
  border-radius: var(--case-radius-full) !important;
  border: none !important;
  box-shadow: 0 4px 14px var(--case-cyan-glow) !important;
}

/* Container */
.case-study-page .container {
  width: min(1140px, calc(100% - 48px));
  margin-inline: auto;
}

/* Breadcrumbs */
.case-breadcrumb {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 135px;
  margin-bottom: 20px;
  color: var(--case-muted);
  font-size: 13px;
  font-weight: 600;
}

.case-breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--case-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

.case-breadcrumb a:hover {
  color: var(--case-blue);
}

.case-breadcrumb [aria-current="page"] {
  color: var(--case-ink);
}

/* ── Hero Section ── */
.project-detail-hero {
  padding-bottom: 50px;
}

.project-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 40px;
  align-items: start;
}

.project-detail-content .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--case-cyan);
  margin-bottom: 12px;
}

.project-detail-title {
  font-size: clamp(36px, 4.8vw, 60px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin: 0 0 16px;
  color: var(--case-ink);
}

.project-detail-content > p.muted {
  font-size: 17px !important;
  line-height: 1.8;
  color: var(--case-muted);
  margin: 0 0 24px;
}

.project-detail-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pchip {
  padding: 5px 12px;
  border-radius: var(--case-radius-full);
  background: var(--case-bg-secondary);
  border: 1px solid var(--case-line);
  color: var(--case-ink-secondary);
  font-size: 12px;
  font-weight: 600;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--case-radius-full);
  background: linear-gradient(135deg, var(--case-cyan), var(--case-blue));
  color: #04101e !important;
  font-size: 13px;
  font-weight: 700;
  border: none;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 16px var(--case-cyan-glow);
  transition: all 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(6, 182, 212, 0.4);
}

.btn.btn-secondary {
  background: var(--case-paper);
  color: var(--case-ink) !important;
  border: 1px solid var(--case-line);
  box-shadow: none;
}

.btn.btn-secondary:hover {
  background: var(--case-paper-hover);
  border-color: var(--case-line-hover);
  color: var(--case-cyan) !important;
}

/* Stats Card */
.project-stats-card {
  background: var(--case-paper);
  border: 1px solid var(--case-line);
  border-radius: var(--case-radius-lg);
  padding: 28px;
  box-shadow: var(--case-shadow-md);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--case-line);
}

.stat-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-item .label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--case-muted);
}

.stat-item .value {
  font-size: 14px;
  font-weight: 600;
  color: var(--case-ink);
}

/* Content Sections & Bento Grids */
.project-content-section {
  padding-top: 20px;
  padding-bottom: 80px;
}

.project-content-section h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-top: 50px !important;
  margin-bottom: 18px;
  color: var(--case-ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.project-content-section h2 i {
  color: var(--case-cyan);
  font-size: 0.85em;
}

.project-content-section p.muted {
  font-size: 15px !important;
  line-height: 1.85;
  color: var(--case-muted);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 24px;
}

.bento-span-2 {
  grid-column: span 2;
}

.bento-card {
  background: var(--case-paper);
  border: 1px solid var(--case-line);
  border-radius: var(--case-radius-md);
  padding: 24px;
  box-shadow: var(--case-shadow-sm);
  backdrop-filter: blur(14px);
  transition: all 0.25s ease;
}

.bento-card:hover {
  border-color: var(--case-line-hover);
  transform: translateY(-2px);
}

.bento-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--case-radius-sm);
  background: rgba(6, 182, 212, 0.1);
  display: grid;
  place-items: center;
  color: var(--case-cyan);
  font-size: 18px;
  margin-bottom: 14px;
}

.bento-card h4 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--case-ink);
}

.bento-card p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--case-muted);
  margin: 0;
}

/* Project Bottom Nav */
.case-project-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 40px 0 80px;
  border-top: 1px solid var(--case-line);
}

.case-project-nav > a {
  background: var(--case-paper);
  border: 1px solid var(--case-line);
  border-radius: var(--case-radius-md);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
  box-shadow: var(--case-shadow-sm);
  backdrop-filter: blur(12px);
  transition: all 0.2s ease;
}

.case-project-nav > a:hover {
  transform: translateY(-2px);
  border-color: var(--case-line-hover);
}

.case-project-nav span {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--case-cyan);
}

.case-project-nav strong {
  font-size: 16px;
  color: var(--case-ink);
}

.case-project-next {
  text-align: right;
  align-items: flex-end;
}

@media (max-width: 900px) {
  .project-detail-grid {
    grid-template-columns: 1fr;
  }
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .bento-span-2 {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .case-study-page .container {
    width: min(100% - 32px, 500px);
  }
  .case-breadcrumb {
    padding-top: 110px;
  }
  .case-project-nav {
    grid-template-columns: 1fr;
  }
}

/* ══════════════════════════════════════════════════════════════
   Architecture Pipeline Diagrams (Modern Executive Engineering)
   ══════════════════════════════════════════════════════════════ */
.architecture-section {
  margin: 50px 0 30px;
  scroll-margin-top: 90px;
}

.architecture-diagram {
  --diagram-accent: var(--case-cyan);
  overflow: hidden;
  border: 1px solid var(--case-line);
  border-radius: var(--case-radius-lg);
  background: var(--case-paper-solid);
  box-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.35);
  margin-top: 24px;
  position: relative;
}

[data-theme="light"] .architecture-diagram {
  box-shadow: 0 14px 35px -5px rgba(15, 23, 42, 0.08);
}

.diagram-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--case-line);
  background: var(--case-bg-secondary);
}

.diagram-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.diagram-signal {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--diagram-accent);
  box-shadow: 0 0 12px var(--diagram-accent);
}

.diagram-header h4 {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--case-ink);
  text-transform: uppercase;
}

.diagram-tech-pills {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.diagram-tech-pills span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--case-line);
  color: var(--case-muted);
}

[data-theme="light"] .diagram-tech-pills span {
  background: rgba(15, 23, 42, 0.04);
}

.diagram-canvas {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 32px 24px;
  gap: 16px;
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.05) 0%, transparent 70%), var(--case-paper-solid);
  position: relative;
}

.diagram-stage {
  position: relative;
  display: flex;
  flex-direction: column;
}

.stage-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--diagram-accent);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stage-nodes {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.diagram-node {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--case-line);
  border-radius: var(--case-radius-md);
  background: var(--case-paper);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

[data-theme="light"] .diagram-node {
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.diagram-node:hover {
  transform: translateY(-2px);
  border-color: var(--diagram-accent);
  box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.25), 0 0 16px rgba(6, 182, 212, 0.15);
}

.node-icon {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--case-line);
  color: var(--diagram-accent);
  transition: all 0.2s ease;
}

.diagram-node:hover .node-icon {
  background: var(--diagram-accent);
  color: #04101e;
  border-color: var(--diagram-accent);
}

.node-text {
  flex: 1;
  min-width: 0;
}

.node-text strong {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--case-ink);
  line-height: 1.3;
}

.node-text small {
  display: block;
  font-size: 11.5px;
  color: var(--case-muted);
  line-height: 1.45;
  margin-top: 3px;
}

.node-tag {
  display: inline-block;
  margin-top: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--case-line);
  color: var(--case-ink-secondary);
}

/* Architecture Specs Bar (The 4 Engineering Pillars) */
.architecture-specs-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--case-line);
  border-top: 1px solid var(--case-line);
}

.spec-item {
  background: var(--case-bg-secondary);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.spec-item small {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 700;
  color: var(--diagram-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.spec-item strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--case-ink);
  line-height: 1.4;
}

.spec-item span {
  font-size: 11.5px;
  color: var(--case-muted);
  line-height: 1.4;
}

.diagram-footer {
  min-height: 44px;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--case-line);
  background: var(--case-paper-solid);
  color: var(--case-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  text-transform: uppercase;
}

.diagram-footer > span:first-child {
  display: flex;
  align-items: center;
  gap: 8px;
}

.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--case-emerald);
  box-shadow: 0 0 8px var(--case-emerald);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .diagram-canvas {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .architecture-specs-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .architecture-diagram {
    border-radius: var(--case-radius-md);
    margin-top: 18px;
  }
  .diagram-header {
    padding: 14px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .diagram-canvas {
    grid-template-columns: 1fr;
    padding: 20px 16px;
    gap: 20px;
  }
  .diagram-stage {
    position: relative;
    padding-left: 16px;
    border-left: 2px solid var(--diagram-accent);
  }
  .stage-label {
    margin-bottom: 10px;
  }
  .stage-nodes {
    gap: 10px;
  }
  .diagram-node {
    padding: 12px;
  }
  .architecture-specs-bar {
    grid-template-columns: 1fr;
  }
  .spec-item {
    padding: 12px 16px;
  }
  .diagram-footer {
    padding: 10px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}