/* ==========================================================================
   Alimul Fazal Nabil — Technical Case Study Stylesheet
   Companion stylesheet for case-studies/*.html
   ========================================================================== */

/* 1. Case Study Hero & Breadcrumb */
.case-study-hero {
  padding: 120px 0 40px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.case-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: "DM Mono", monospace;
  font-size: 13px;
  color: var(--text-subtle);
  margin-bottom: 24px;
}

.case-breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

.case-kicker {
  font-family: "DM Mono", monospace;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin-bottom: 12px;
  display: block;
}

.case-title {
  font-family: "Manrope", sans-serif;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  color: var(--text);
}

.case-subtitle {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 0 32px;
}

/* Metadata Grid */
.case-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 32px;
}

.case-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.case-meta-label {
  font-family: "DM Mono", monospace;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-subtle);
  letter-spacing: 0.05em;
}

.case-meta-val {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.case-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* 2. Layout: Sidebar TOC + Main Article Content */
.case-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  padding: 48px 0 80px;
  position: relative;
}

/* Sticky TOC */
.case-sidebar {
  position: sticky;
  top: 96px;
  height: fit-content;
  align-self: start;
}

.case-toc-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
}

.case-toc-title {
  font-family: "DM Mono", monospace;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--text-subtle);
  letter-spacing: 0.05em;
  margin: 0 0 14px;
}

.case-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.case-toc-list a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s ease, transform 0.15s ease;
  display: block;
}

.case-toc-list a:hover {
  color: var(--blue);
  transform: translateX(4px);
}

/* Main Article Content */
.case-article {
  max-width: 820px;
}

.case-section {
  margin-bottom: 56px;
  scroll-margin-top: 100px;
}

.case-section h2 {
  font-family: "Manrope", sans-serif;
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  margin: 0 0 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-faint);
  display: flex;
  align-items: center;
  gap: 12px;
}

.case-section h2 .sec-num {
  font-family: "DM Mono", monospace;
  font-size: 14px;
  color: var(--cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.case-section h3 {
  font-family: "Manrope", sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 12px;
}

.case-section p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0 0 18px;
}

.case-section ul, .case-section ol {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0 0 20px;
  padding-left: 24px;
}

.case-section li {
  margin-bottom: 8px;
}

.case-section strong {
  color: var(--text);
}

/* 3. Architecture Diagrams & Code Blocks */
.arch-diagram-box {
  background: #05070e;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 24px 0 32px;
  position: relative;
  overflow-x: auto;
}

.arch-diagram-title {
  font-family: "DM Mono", monospace;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--cyan);
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.arch-diagram-content {
  font-family: "DM Mono", monospace;
  font-size: 13px;
  line-height: 1.5;
  color: #38bdf8;
  white-space: pre;
  margin: 0;
}

/* 4. Custom Callout Boxes */
.case-callout {
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  border-left: 4px solid;
}

.callout-decision {
  background: rgba(56, 189, 248, 0.07);
  border-color: var(--blue);
}

.callout-decision h4 {
  font-family: "Manrope", sans-serif;
  color: var(--blue);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: var(--amber);
}

.callout-warning h4 {
  font-family: "Manrope", sans-serif;
  color: var(--amber);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-evidence {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--green);
}

.callout-evidence h4 {
  font-family: "Manrope", sans-serif;
  color: var(--green);
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.case-callout p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* 5. Trade-off Comparison Tables */
.case-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

.case-table th, .case-table td {
  padding: 12px 16px;
  border: 1px solid var(--line);
  text-align: left;
}

.case-table th {
  background: var(--surface);
  color: var(--text);
  font-family: "DM Mono", monospace;
  font-size: 12px;
  text-transform: uppercase;
}

.case-table td {
  background: var(--surface-card);
  color: var(--text-muted);
}

/* 6. Navigation Footer Between Case Studies */
.case-nav-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 32px 0;
  margin-top: 48px;
  border-top: 1px solid var(--line);
  gap: 16px;
}

.case-nav-btn {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  gap: 4px;
  max-width: 48%;
}

.case-nav-btn span.nav-dir {
  font-family: "DM Mono", monospace;
  font-size: 12px;
  color: var(--text-subtle);
  text-transform: uppercase;
}

.case-nav-btn span.nav-title {
  font-family: "Manrope", sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--blue);
  transition: color 0.15s ease;
}

.case-nav-btn:hover span.nav-title {
  color: var(--cyan);
}

/* Light Theme Overrides */
html[data-theme="light"] .arch-diagram-box {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

html[data-theme="light"] .arch-diagram-content {
  color: #0369a1;
}

/* Responsive */
@media (max-width: 900px) {
  .case-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .case-sidebar {
    position: static;
  }
}

@media (max-width: 640px) {
  .case-study-hero {
    padding: 90px 0 24px;
  }
  .case-meta-grid {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
    gap: 12px;
  }
  .case-nav-footer {
    flex-direction: column;
    align-items: flex-start;
  }
  .case-nav-btn {
    max-width: 100%;
  }
}