/* ===================================================
   CASE STUDY — DESIGN SYSTEM
   Paolo Vinícios Portfolio
   Dark theme, consistent with main portfolio
   =================================================== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap");

/* ─── Reset ─── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: clip;
}

/* ─── Design Tokens (mirrors portfolio) ─── */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --secondary: #10b981;

  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-card: #161616;

  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;

  --border: #27272a;
  --border-light: #18181b;

  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.08);

  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.6);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  --sp-xs: 0.5rem;
  --sp-sm: 1rem;
  --sp-md: 1.5rem;
  --sp-lg: 2.5rem;
  --sp-xl: 4rem;
  --sp-2xl: 6rem;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --trans: 0.3s ease;
}

/* ─── Base ─── */
body {
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: clip;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--trans);
}
button {
  border: none;
  background: none;
  cursor: pointer;
  font: inherit;
}
ul {
  list-style: none;
}

/* ─── Layout ─── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

/* ─── Reading progress bar ─── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  z-index: 300;
  transition: width 0.1s linear;
}

/* ─── Back Nav ─── */
.back-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md);
  padding: 0 var(--sp-md);
  height: 68px;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--trans);
}

.back-nav.scrolled {
  height: 56px;
  background: rgba(10, 10, 10, 0.98);
  box-shadow: var(--shadow-sm);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color var(--trans);
}
.back-btn:hover {
  color: var(--text-primary);
}
.back-btn svg {
  transition: transform 0.2s ease;
}
.back-btn:hover svg {
  transform: translateX(-3px);
}

.nav-brand {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ─── View Toggle ─── */
.view-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-tertiary);
  white-space: nowrap;
  transition: all 0.25s ease;
}

.toggle-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
}

/* ─── Hero ─── */
.case-hero {
  padding-top: 68px;
  background: var(--bg-primary);
  overflow: hidden;
  position: relative;
}

.case-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      circle at 15% 40%,
      rgba(59, 130, 246, 0.08) 0,
      transparent 55%
    ),
    radial-gradient(
      circle at 85% 20%,
      rgba(16, 185, 129, 0.06) 0,
      transparent 45%
    );
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  padding: var(--sp-lg) 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: var(--sp-md);
}

.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

.case-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  background: linear-gradient(135deg, #fff 0%, rgba(255, 255, 255, 0.75) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  max-width: 18ch;
  margin-bottom: var(--sp-md);
}

.case-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 58ch;
  font-weight: 300;
  line-height: 1.65;
  margin-bottom: var(--sp-lg);
}

.meta-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--sp-xl);
  width: fit-content;
}

.meta-cell {
  padding: 0.875rem 1.5rem;
  border-right: 1px solid var(--border);
}
.meta-cell:last-child {
  border-right: none;
}

.meta-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 0.25rem;
}

.meta-value {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.hero-image-wrap {
  width: 100%;
  max-height: 560px;
  overflow: hidden;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  position: relative;
  z-index: 1;
}

.hero-image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 50%,
    var(--bg-primary) 100%
  );
  pointer-events: none;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

/* ─── Page Layout ─── */
.page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--sp-xl);
  align-items: start; /* critical for sticky children */
  padding: var(--sp-xl) 0 var(--sp-2xl);
}

@media (max-width: 960px) {
  .page-layout {
    grid-template-columns: 1fr;
  }
  .case-sidebar {
    order: -1;
    position: static;
  }
}

/* ─── Sidebar ─── */
.case-sidebar {
  position: sticky;
  top: 80px;
  /* max-height keeps the sidebar from being taller than the viewport,
     which would prevent sticky from engaging */
  max-height: calc(100vh - 96px);
  overflow-y: auto;
  /* hide scrollbar visually but keep function */
  scrollbar-width: none;
  -ms-overflow-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
}
.case-sidebar::-webkit-scrollbar {
  display: none;
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--sp-md);
}

.sidebar-card-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-sm);
  padding-bottom: var(--sp-sm);
  border-bottom: 1px solid var(--border-light);
}

.result-list {
  display: flex;
  flex-direction: column;
}

.result-row {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-light);
}
.result-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.result-row:first-child {
  padding-top: 0;
}

.result-value {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.result-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-xs);
}

.tool-chip {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.625rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: border-color var(--trans);
}
.tool-chip:hover {
  border-color: var(--primary);
  color: var(--text-primary);
}
.tool-chip img {
  width: 14px;
  height: 14px;
  object-fit: contain;
}

.toc {
  display: flex;
  flex-direction: column;
}

.toc-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-light);
  transition: color var(--trans);
}
.toc-item:last-child {
  border-bottom: none;
}
.toc-item:hover {
  color: var(--text-secondary);
}
.toc-item.active {
  color: var(--primary-light);
  font-weight: 500;
}

.toc-num {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  font-weight: 600;
  width: 1.5rem;
  flex-shrink: 0;
  opacity: 0.5;
}
.toc-item.active .toc-num {
  opacity: 1;
  color: var(--primary);
}

/* ─── Content ─── */
.case-content {
  min-width: 0;
}

.cs-section {
  margin-bottom: var(--sp-xl);
  padding-bottom: var(--sp-xl);
  border-bottom: 1px solid var(--border-light);
}
.cs-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.section-head {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-lg);
}

.section-num {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  padding: 0.2rem 0.625rem;
  white-space: nowrap;
}

.section-title {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* ─── Prose ─── */
.prose {
  color: var(--text-secondary);
}
.prose p {
  margin-bottom: var(--sp-sm);
  max-width: 68ch;
}
.prose p:last-child {
  margin-bottom: 0;
}
.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

.prose ul {
  margin: var(--sp-sm) 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.prose ul li {
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-secondary);
}
.prose ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 0.875rem;
}

/* ─── Pull Quote ─── */
.pull-quote {
  border-left: 3px solid var(--primary);
  padding: var(--sp-md) var(--sp-lg);
  margin: var(--sp-lg) 0;
  background: rgba(59, 130, 246, 0.05);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.pull-quote p {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  font-weight: 300;
}

/* ─── Challenge Grid ─── */
.challenge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--sp-md) 0;
}

.challenge-item {
  background: var(--bg-card);
  padding: var(--sp-md);
  transition: background var(--trans);
}
.challenge-item:hover {
  background: var(--bg-tertiary);
}

.challenge-idx {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.challenge-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.challenge-desc {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  line-height: 1.55;
}

/* ─── Before / After ─── */
.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-sm);
  margin: var(--sp-md) 0;
}
@media (max-width: 560px) {
  .before-after {
    grid-template-columns: 1fr;
  }
}

.ba-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-md);
}
.ba-panel.after {
  border-color: rgba(59, 130, 246, 0.3);
  background: rgba(59, 130, 246, 0.04);
}

.ba-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 0.625rem;
}
.ba-panel.after .ba-tag {
  color: var(--primary-light);
}

.ba-heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--sp-sm);
}

.ba-list {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.ba-item {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.5;
}
.ba-panel:not(.after) .ba-item::before {
  content: "✗";
  position: absolute;
  left: 0;
  color: #f87171;
}
.ba-panel.after .ba-item::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--secondary);
}

/* ─── Process Steps ─── */
.process-steps {
  display: flex;
  flex-direction: column;
  margin: var(--sp-md) 0;
}

.process-step {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--sp-sm);
  position: relative;
  padding-bottom: var(--sp-md);
}
.process-step:last-child {
  padding-bottom: 0;
}

.process-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 1.125rem;
  top: 2.5rem;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.step-circle {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition:
    border-color var(--trans),
    background var(--trans);
}
.process-step:hover .step-circle {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
}

.step-body {
  padding-top: 0.3rem;
}

.step-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.step-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ─── Architecture box ─── */
.arch-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  margin: var(--sp-md) 0;
  font-family: "SFMono-Regular", Consolas, monospace;
}

.arch-label {
  font-family: Inter, sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--sp-sm);
}

.arch-root {
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.arch-tree {
  padding-left: 1.25rem;
  border-left: 1px solid var(--border);
  margin-left: 0.5rem;
}

.arch-node {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  padding: 0.2rem 0 0.2rem 1rem;
  position: relative;
}
.arch-node::before {
  content: "├─";
  position: absolute;
  left: 0;
  color: var(--border);
  font-size: 0.75rem;
}
.arch-node:last-child::before {
  content: "└─";
}
.arch-node .hi {
  color: var(--primary-light);
  font-weight: 500;
}

/* ─── Personas ─── */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--sp-sm);
  margin: var(--sp-md) 0;
}

.persona-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--sp-md);
  transition: border-color var(--trans);
}
.persona-card:hover {
  border-color: var(--primary);
}

.persona-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--sp-sm);
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
}

.persona-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.persona-role {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--sp-sm);
}

.persona-traits {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.trait {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  padding-left: 1rem;
  position: relative;
  line-height: 1.45;
}
.trait::before {
  content: "·";
  position: absolute;
  left: 0.2rem;
  color: var(--primary);
}

/* ─── Insight Box ─── */
.insight {
  display: flex;
  gap: var(--sp-sm);
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--sp-md);
  margin: var(--sp-md) 0;
}

.insight-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.blue-icon {
  color: var(--primary);
}

.insight-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-light);
  margin-bottom: 0.375rem;
}
.insight p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
}

/* ─── Gallery ─── */
.gallery-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.gallery-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

.image-grid {
  display: grid;
  gap: var(--sp-xs);
  margin: var(--sp-md) 0;
}
.image-grid.cols-1 {
  grid-template-columns: 1fr;
}
.image-grid.cols-2 {
  grid-template-columns: 1fr 1fr;
}
.image-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 640px) {
  .image-grid.cols-2,
  .image-grid.cols-3 {
    grid-template-columns: 1fr;
  }
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  max-height: 600px;
}

.gallery-item img {
  width: 100%;
  display: block;
  transition: transform 0.5s var(--ease-out);
}
.gallery-item:hover img {
  transform: scale(1.03);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 60%);
  opacity: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--sp-sm);
  transition: opacity 0.3s ease;
}
.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-caption {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  transform: translateY(4px);
  transition: transform 0.3s ease;
}
.gallery-item:hover .gallery-caption {
  transform: translateY(0);
}

.gallery-expand {
  position: absolute;
  top: var(--sp-xs);
  right: var(--sp-xs);
  width: 30px;
  height: 30px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.gallery-item:hover .gallery-expand {
  opacity: 1;
}

/* ─── Results Panel ─── */
.results-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin: var(--sp-md) 0;
}

.result-big {
  background: var(--bg-card);
  padding: var(--sp-lg) var(--sp-md);
  text-align: center;
  transition: background var(--trans);
}
.result-big:hover {
  background: var(--bg-tertiary);
}

.result-big-value {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.result-big-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.result-big-note {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ─── Summary / Full toggle logic ─── */
.full-only {
  display: none;
}
.summary-only {
  display: block;
}

[data-view="full"] .full-only {
  display: block;
}
[data-view="full"] .full-only-flex {
  display: flex;
}
[data-view="full"] .summary-only {
  display: none;
}
[data-view="summary"] .full-only {
  display: none;
}
[data-view="summary"] .summary-only {
  display: block;
}

.full-only.grid {
  display: none;
}
[data-view="full"] .full-only.grid {
  display: grid;
}

.toc-full-only {
  display: none;
}
[data-view="full"] .toc-full-only {
  display: flex;
}

/* ─── Expand teaser ─── */
.expand-teaser {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-sm);
  padding: var(--sp-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-top: var(--sp-lg);
}

.expand-teaser p {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  margin: 0;
}

.expand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-light);
  white-space: nowrap;
  transition: color var(--trans);
}
.expand-link:hover {
  color: var(--primary);
}

/* ─── CTA ─── */
.case-cta {
  text-align: center;
  padding: var(--sp-xl) 0 var(--sp-lg);
}

.cta-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--sp-sm);
}

.cta-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--sp-lg);
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all var(--trans);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.45);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* ─── Lightbox ─── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(12px);
  align-items: center;
  justify-content: center;
  padding: var(--sp-md);
}
.lightbox.open {
  display: flex;
}

.lb-inner {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-sm);
}

.lb-inner img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
}

.lb-close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
  transition: color var(--trans);
}
.lb-close:hover {
  color: var(--text-primary);
}

.lb-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}

.lb-btn {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  transition: color var(--trans);
}
.lb-btn:hover {
  color: var(--text-primary);
}

.lb-count {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  min-width: 3rem;
  text-align: center;
}

.lb-cap {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  text-align: center;
}

/* ─── Animations ─── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeUp 0.6s var(--ease-out) both;
}
.delay-1 {
  animation-delay: 0.1s;
}
.delay-2 {
  animation-delay: 0.2s;
}
.delay-3 {
  animation-delay: 0.3s;
}

/* ─── Mobile ─── */
@media (max-width: 768px) {
  .meta-strip {
    width: 100%;
  }
  .meta-cell {
    padding: 0.75rem 1rem;
  }
  .nav-brand {
    display: none;
  }
  .results-panel {
    grid-template-columns: 1fr 1fr;
  }
  .page-layout {
    gap: var(--sp-lg);
  }
  .back-nav {
    padding: 0 var(--sp-sm);
  }
}

@media (max-width: 480px) {
  .toggle-btn {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
  }
  /* Always show full content on mobile — toggle doesn't make sense on small screens */
  .full-only {
    display: block !important;
  }
  .full-only.grid {
    display: grid !important;
  }
  .toc-full-only {
    display: flex !important;
  }
  .summary-only {
    display: none !important;
  }
  .expand-teaser {
    display: none !important;
  }
}