/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Purple IO brand palette */
  --color-bg: #1c1826;
  --color-bg-raised: #242038;
  --color-surface: #2d2845;
  --color-surface-hover: #352f50;
  --color-text: #e8e4f0;
  --color-text-bright: #f3f0fa;
  --color-text-secondary: #918c9f;
  --color-text-muted: #5f5a6e;
  --color-border: #38324f;
  --color-border-bright: #4a4365;

  --color-green: #a78bfa;
  --color-green-dim: rgba(167, 139, 250, 0.10);
  --color-cyan: #5eead4;
  --color-cyan-dim: rgba(94, 234, 212, 0.08);
  --color-amber: #fbbf24;
  --color-amber-dim: rgba(251, 191, 36, 0.06);
  --color-pink: #e879f9;
  --color-pink-dim: rgba(232, 121, 249, 0.08);
  --color-purple: #e879f9;
  --color-purple-dim: rgba(232, 121, 249, 0.08);
  --color-blue: #818cf8;
  --color-blue-dim: rgba(129, 140, 248, 0.08);
  --color-orange: #fb923c;
  --color-red: #f87171;

  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Menlo, monospace;

  --radius: 0;
  --radius-sm: 0;
  --transition: 0.15s ease;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
}

::selection {
  background: rgba(167, 139, 250, 0.25);
  color: var(--color-text-bright);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-bright);
}

/* ===== Header ===== */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  white-space: nowrap;
  color: var(--color-text-bright);
  transition: color var(--transition);
}

.logo:hover {
  color: var(--color-green);
}

.logo-icon {
  font-size: 1rem;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-green-dim);
  border: 1px solid var(--color-border);
}

.header-desc {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.header-desc::before {
  content: '// ';
  color: var(--color-text-muted);
}

/* ===== Hero ===== */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
  overflow-x: auto;
}

.hero-ascii {
  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', Consolas, Menlo, monospace;
  font-size: 0.75rem;
  line-height: 1.1;
  color: var(--color-green);
  margin: 0;
  white-space: pre;
}

.hero-ascii + .hero-ascii {
  margin-top: 4px;
  color: var(--color-blue);
}

@keyframes lineReveal {
  from { clip-path: inset(0 0 100% 0); }
  to { clip-path: inset(0 0 0 0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes shimmer {
  0% { background-position: 100% center; }
  100% { background-position: 0% center; }
}

.hero-ascii {
  animation: lineReveal 0.42s steps(6) both;
}

.hero-ascii + .hero-ascii {
  animation-delay: 0.45s;
}

.hero p {
  display: inline-block;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  margin-top: 20px;
  opacity: 0;
  background:
    linear-gradient(90deg, #0000 calc(50% - 4em), #c4b5fd, #0000 calc(50% + 4em)),
    var(--color-green);
  background-size: 250% 100%, auto;
  background-repeat: no-repeat;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeIn 0.3s ease 1s forwards, shimmer 2s linear 1.5s infinite;
}

@keyframes spin-chars {
  0%     { content: "·"; }
  10%    { content: "✢"; }
  20%    { content: "✳"; }
  30%    { content: "✶"; }
  40%    { content: "✻"; }
  50%    { content: "✽"; }
  60%    { content: "✻"; }
  70%    { content: "✶"; }
  80%    { content: "✳"; }
  90%    { content: "✢"; }
}

.spinner {
  display: inline-block;
  font-style: normal;
  width: 1em;
  text-align: center;
}

.spinner::after {
  content: "·";
  -webkit-text-fill-color: var(--color-green);
  animation: spin-chars 1800ms steps(1) 1s infinite;
}

/* ===== Intro ===== */
.intro {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 32px;
}

.intro-text {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.intro-text p {
  margin-bottom: 6px;
}

.intro-text p::before {
  content: '> ';
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.intro-highlight {
  color: var(--color-cyan);
}

.intro-punch {
  color: var(--color-amber) !important;
  font-weight: 600;
  margin-top: 4px;
}

.intro-stats {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 20px 24px;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
}

.stat-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-green);
  height: 2rem;
  display: flex;
  align-items: center;
}

.stat-value--dual {
  font-size: 0.875rem;
  letter-spacing: 0.04em;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

@media (max-width: 768px) {
  .intro-stats {
    flex-wrap: wrap;
    gap: 16px;
    padding: 16px;
  }

  .stat-item {
    flex: 1 1 40%;
  }

  .stat-divider {
    display: none;
  }
}

/* ===== Filter ===== */
.filter-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

.filter-bar {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
}

.filter-mobile-toggle {
  display: none;
}

.filter-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.search-toggle:hover {
  color: var(--color-text-bright);
  border-color: var(--color-border-bright);
}

.search-toggle.active {
  color: var(--color-blue);
  border-color: var(--color-blue);
}

.search-box {
  position: relative;
  max-width: 420px;
}

.search-icon {
  display: none;
}

.search-box::before {
  content: '>';
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-green);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 8px 16px 8px 32px;
  border: 1px solid var(--color-border);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  background: var(--color-bg);
  color: var(--color-text-bright);
  transition: border-color var(--transition);
  caret-color: var(--color-green);
}

.search-box input::placeholder {
  color: var(--color-text-muted);
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-blue);
}

.filter-group {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 5px 14px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  color: var(--color-text-bright);
  background: var(--color-surface);
}

.filter-btn.active {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text-bright);
}

.filter-count {
  font-size: 0.625rem;
  color: var(--color-text-muted);
  margin-left: 2px;
}

/* ===== Section Labels ===== */
.section-label {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
}

.section-label::before {
  content: '// ';
  color: var(--color-text-muted);
}

/* ===== Featured Grid ===== */
.cases-grid.featured-grid {
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 768px) {
  .cases-grid.featured-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Cover */
.card-cover {
  height: 140px;
  position: relative;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.cover-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.cover-impact {
  position: absolute;
  bottom: 14px;
  left: 16px;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-bright);
  z-index: 1;
  padding: 4px 10px;
  background: rgba(28, 24, 38, 0.85);
}

.cover-impact::before {
  content: '[*] ';
  color: var(--color-text-muted);
}

/* ===== Cases Grid ===== */
.cases-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}

.case-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: border-color var(--transition);
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  border-color: var(--color-border-bright);
}

.case-card:hover .card-title {
  color: var(--color-blue);
}

/* Card top bar */
.card-icon {
  height: 32px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 8px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.card-icon::before {
  content: '';
  display: none;
}

.card-tab {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
}

.card-body {
  padding: 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
}

.card-category {
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-amber);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.card-category::before {
  content: '# ';
  color: var(--color-text-muted);
}

/* Card Hashtags */
.card-hashtags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 10px;
}

.card-hashtag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-cyan);
  opacity: 0.8;
}

.card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--color-text-bright);
  transition: color var(--transition);
}

.card-summary {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
}

.card-author {
  color: var(--color-pink);
  font-weight: 500;
}

.card-author::before {
  content: '@';
  opacity: 0.5;
}

.card-dept {
  color: var(--color-text-muted);
}

/* ===== No Results ===== */
.no-results {
  text-align: center;
  padding: 60px 24px;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

.no-results::before {
  content: '> ';
  color: var(--color-green);
  font-family: var(--font-mono);
}

/* ===== Case Detail ===== */
.case-detail {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.case-detail-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.back-link {
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  font-weight: 500;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.back-link:hover {
  color: var(--color-blue);
}

.case-badge {
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-amber);
  background: var(--color-amber-dim);
  padding: 3px 10px;
  border: 1px solid rgba(251, 191, 36, 0.12);
}

.case-detail-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
  align-items: start;
}

.case-detail-left {
  position: sticky;
  top: 24px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
}

/* Sidebar */
.case-sidebar {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  padding: 24px;
}

.case-app-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
  border: 1px solid var(--color-border);
}

.case-app-icon svg {
  width: 24px;
  height: 24px;
  color: #fff;
  stroke-width: 1.5;
}

/* Case Detail Hashtags */
.case-hashtags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.case-hashtag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-cyan);
  background: var(--color-cyan-dim);
  padding: 2px 8px;
  border: 1px solid rgba(94, 234, 212, 0.12);
}

.case-title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
  color: var(--color-text-bright);
}

.case-summary {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.case-meta-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.meta-label {
  font-size: 0.75rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.meta-label::before {
  content: '// ';
}

.meta-value {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text);
}

.meta-value.highlight {
  color: var(--color-green);
  font-weight: 600;
  font-family: var(--font-mono);
}

.meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.tag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 2px 8px;
  background: var(--color-blue-dim);
  border: 1px solid rgba(129, 140, 248, 0.12);
  color: var(--color-blue);
}

/* Author */
.case-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-pink);
  background: var(--color-pink-dim);
  border: 1px solid rgba(232, 121, 249, 0.15);
  flex-shrink: 0;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-bright);
}

.author-dept {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

/* Content */
.case-content {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  padding: 36px;
  min-height: 400px;
  margin-top: 53px;
  min-width: 0;
  overflow-x: auto;
}

.case-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 16px;
  color: var(--color-text-bright);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.case-content h2::before {
  content: '## ';
  color: var(--color-blue);
  font-weight: 400;
  font-family: var(--font-mono);
}

.case-content h2:first-child {
  margin-top: 0;
}

.case-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--color-text-bright);
}

.case-content h3::before {
  content: '### ';
  color: var(--color-text-muted);
  font-weight: 400;
  font-family: var(--font-mono);
}

.case-content p {
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--color-text);
}

.case-content ul,
.case-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.case-content li {
  margin-bottom: 8px;
  line-height: 1.7;
  color: var(--color-text);
}

.case-content li::marker {
  color: var(--color-text-muted);
}

.case-content li strong {
  color: var(--color-orange);
}

.case-content img {
  max-width: 100%;
  margin: 24px 0;
  border: 1px solid var(--color-border);
}

.case-content code {
  font-size: 0.85em;
  font-family: var(--font-mono);
  background: var(--color-surface);
  padding: 2px 7px;
  border: 1px solid var(--color-border);
  color: var(--color-green);
}

.case-content pre {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 16px;
  position: relative;
}

.case-content pre::before {
  content: 'TERMINAL';
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 4px 10px;
  letter-spacing: 0.08em;
  opacity: 0.6;
}

.case-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-green);
  font-size: 0.8125rem;
}

.case-content blockquote {
  border-left: 2px solid var(--color-pink);
  padding: 14px 20px;
  margin: 16px 0;
  background: var(--color-pink-dim);
}

.case-content blockquote p {
  margin-bottom: 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.case-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.case-content th,
.case-content td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.case-content th {
  font-weight: 600;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.case-content td {
  color: var(--color-text);
}

/* ===== Case Nav (Prev/Next) ===== */
.case-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.case-nav-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  transition: border-color var(--transition);
  max-width: 48%;
}

.case-nav-link:hover {
  border-color: var(--color-border-bright);
}

.case-nav-link:hover .case-nav-title {
  color: var(--color-blue);
}

.case-nav-link.next {
  margin-left: auto;
  text-align: right;
}

.case-nav-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

.case-nav-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Footer ===== */
.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: center;
  gap: 8px;
}

.footer-badge {
  display: inline-block;
  padding: 6px 16px;
  background: transparent;
  border: 1px solid var(--color-border);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.footer-badge:hover {
  border-color: var(--color-border-bright);
  color: var(--color-text-secondary);
}

/* ===== Help Page ===== */
.help-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.help-header {
  margin-bottom: 24px;
}

.help-content {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  padding: 36px;
}

.help-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 32px;
}

.help-title::before {
  content: '# ';
  color: var(--color-green);
  font-weight: 400;
  font-family: var(--font-mono);
}

.help-section {
  margin-bottom: 32px;
}

.help-section:last-child {
  margin-bottom: 0;
}

.help-section h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.help-section h2::before {
  content: '## ';
  color: var(--color-blue);
  font-weight: 400;
  font-family: var(--font-mono);
}

.help-section p {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 8px;
}

.help-section ul,
.help-section ol {
  padding-left: 24px;
  margin-bottom: 12px;
}

.help-section li {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 6px;
}

.help-section li::marker {
  color: var(--color-text-muted);
}

.help-section li strong {
  color: var(--color-orange);
}

.help-section blockquote {
  border-left: 2px solid var(--color-pink);
  padding: 14px 20px;
  margin: 16px 0 0;
  background: var(--color-pink-dim);
}

.help-section blockquote p {
  margin-bottom: 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.help-note {
  color: var(--color-text-muted) !important;
  font-size: 0.8125rem !important;
}

.help-link {
  color: var(--color-cyan);
  transition: color var(--transition);
}

.help-link:hover {
  color: var(--color-blue);
}

/* ===== About Section ===== */
.about-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.about-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.about-label::before {
  content: '// ';
}

.about-company {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-bright);
  margin-bottom: 6px;
}

.about-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero-ascii {
    font-size: 0.5rem;
  }

  .hero p {
    font-size: 0.75rem;
  }

  .cases-grid {
    grid-template-columns: 1fr;
  }

  .case-detail-layout {
    grid-template-columns: 1fr;
  }

  .case-detail-left {
    position: static;
    max-height: none;
    overflow-y: visible;
  }

  .case-content {
    padding: 24px;
    margin-left: -24px;
    margin-right: -24px;
    border-left: none;
    border-right: none;
    margin-top: 0;
  }

  .case-content img {
    margin-left: -24px;
    margin-right: -24px;
    max-width: calc(100% + 48px);
    width: calc(100% + 48px);
    border-left: none;
    border-right: none;
  }

  .header-desc {
    display: none;
  }

  .filter-bar {
    padding: 12px;
    gap: 0;
  }

  .filter-mobile-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 8px 4px;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: color var(--transition);
  }

  .filter-mobile-toggle:hover {
    color: var(--color-text-bright);
  }

  .filter-mobile-toggle.active {
    color: var(--color-text-bright);
  }

  .filter-mobile-chevron {
    margin-left: auto;
    transition: transform var(--transition);
  }

  .filter-mobile-toggle.active .filter-mobile-chevron {
    transform: rotate(180deg);
  }

  .filter-collapsible {
    display: none;
    padding-top: 12px;
  }

  .filter-collapsible.open {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .case-nav {
    flex-direction: column;
  }

  .case-nav-link {
    max-width: 100%;
  }

  .case-nav-link.next {
    margin-left: 0;
  }
}