/* ============================================
   Principal Product Designer Portfolio — 2027
   ============================================ */

:root {
  --bg-primary: #fafafa;
  --bg-secondary: #f4f4f5;
  --bg-tertiary: #e4e4e7;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --border-color: #e4e4e7;
  --border-subtle: #f0f0f2;
  --text-primary: #09090b;
  --text-secondary: #52525b;
  --text-tertiary: #71717a;
  --text-muted: #a1a1aa;
  --accent: #4338ca;
  --accent-light: #6366f1;
  --accent-soft: rgba(99, 102, 241, 0.08);
  --accent-glow: rgba(99, 102, 241, 0.2);
  --gradient-hero: linear-gradient(135deg, #4338ca 0%, #7c3aed 50%, #a855f7 100%);
  --gradient-subtle: linear-gradient(180deg, rgba(99, 102, 241, 0.04) 0%, transparent 100%);
  --success: #16a34a;
  --warning: #d97706;
  --font-display: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 60px var(--accent-glow);
  --nav-height: 72px;
  --container: 1200px;
  --section-gap: 120px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #09090b;
  --bg-secondary: #111114;
  --bg-tertiary: #18181b;
  --bg-card: #141419;
  --bg-elevated: #1a1a1f;
  --border-color: #27272a;
  --border-subtle: #1f1f23;
  --text-primary: #fafafa;
  --text-secondary: #d4d4d8;
  --text-tertiary: #a1a1aa;
  --text-muted: #71717a;
  --accent-soft: rgba(99, 102, 241, 0.12);
  --accent-glow: rgba(99, 102, 241, 0.15);
  --gradient-subtle: linear-gradient(180deg, rgba(99, 102, 241, 0.06) 0%, transparent 100%);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  padding: 12px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { top: 16px; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Navigation ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: color-mix(in srgb, var(--bg-primary) 85%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: box-shadow var(--transition);
}

.navbar.scrolled { box-shadow: var(--shadow-sm); }

.navbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--accent-soft);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent-light);
  color: var(--accent-light);
}

.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  background: var(--bg-primary);
  padding: 24px;
  z-index: 999;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--border-color);
}

.mobile-nav.open { display: flex; }

.mobile-nav a {
  padding: 16px;
  font-size: 1.125rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
}

.mobile-nav a:hover { background: var(--accent-soft); color: var(--text-primary); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-hero);
  color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-light);
  background: var(--accent-soft);
}

.btn-sm { padding: 8px 16px; font-size: 0.875rem; }

.btn-ghost {
  background: transparent;
  color: var(--accent-light);
  padding: 0;
  font-weight: 600;
}

.btn-ghost:hover { opacity: 0.8; }

/* ---- Typography ---- */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.7;
}

.section-header {
  margin-bottom: 56px;
}

.section-header.center {
  text-align: center;
}

.section-header.center .section-subtitle {
  margin: 0 auto;
}

/* ---- Hero ---- */
.hero {
  padding: calc(var(--nav-height) + 80px) 0 80px;
  background: var(--gradient-subtle);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
  }
}

/* ---- Hero Photo (Futuristic) ---- */
.hero-photo {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
}

.hero-photo-inner {
  position: relative;
  z-index: 3;
  width: 78%;
  height: 78%;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border-color);
  background: var(--bg-tertiary);
}

.hero-photo-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-photo-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  background: linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
              var(--gradient-hero) border-box;
  animation: rotate-slow 12s linear infinite;
  z-index: 2;
}

.hero-photo-glow {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  filter: blur(24px);
  opacity: 0.7;
  z-index: 1;
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

@media (max-width: 768px) {
  .hero-photo {
    max-width: 260px;
    order: -1;
    margin-bottom: 24px;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent-light) 20%, transparent);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero-tags {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 24px;
  line-height: 1.5;
}

.hero-description {
  font-size: 1.1875rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 56px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (min-width: 900px) {
  .hero-metrics {
    grid-template-columns: repeat(5, 1fr);
  }
  .hero-metrics .metric-card--wide {
    grid-column: auto;
  }
}

.metric-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}

.metric-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.metric-value {
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 6px;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* ---- Bento Grid ---- */
.bento-grid {
  display: grid;
  gap: 16px;
}

.bento-grid-3 { grid-template-columns: repeat(3, 1fr); }
.bento-grid-2 { grid-template-columns: repeat(2, 1fr); }

.bento-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.bento-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--accent-light) 30%, var(--border-color));
}

.bento-card.span-2 { grid-column: span 2; }
.bento-card.span-full { grid-column: 1 / -1; }

.bento-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.bento-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.3;
}

.bento-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.bento-metric {
  font-family: var(--font-display);
  font-size: 2.5rem;
  line-height: 1;
  margin-bottom: 8px;
  color: var(--accent-light);
}

.bento-metric-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ---- Work Impact (Problem → Solution → Metrics) ---- */
.work-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.work-card:hover {
  border-color: color-mix(in srgb, var(--accent-light) 25%, var(--border-color));
  box-shadow: var(--shadow-md);
}

.work-card-header {
  padding: 28px 32px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.work-card-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
  flex: 1 1 100%;
  margin-bottom: 4px;
}

.work-card-context {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.work-card-body {
  padding: 24px 32px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

.work-block-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 10px;
}

.work-block p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.work-block ul {
  list-style: none;
  margin: 0;
}

.work-block li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
  padding: 5px 0 5px 18px;
  position: relative;
}

.work-block li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
}

.work-block--problem li::before {
  background: var(--warning);
}

.work-block--solution li::before {
  background: var(--accent-light);
}

.work-subhead {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 14px 0 6px;
  text-transform: none;
  letter-spacing: 0;
}

.work-subhead:first-of-type {
  margin-top: 0;
}

.work-block--impact p {
  color: var(--text-primary);
  font-weight: 500;
}

.work-metrics-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.work-metrics-inline div strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--accent-light);
  line-height: 1.2;
}

.work-metrics-inline div span {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.work-card-footer {
  padding: 0 32px 28px;
}

.case-problem,
.case-solution {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
}

.case-problem {
  border-left: 3px solid var(--warning);
}

.case-solution {
  border-left: 3px solid var(--accent-light);
}

.case-problem strong,
.case-solution strong {
  display: block;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.case-detail-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.case-detail-list li {
  padding: 3px 0 3px 14px;
  position: relative;
  font-size: 0.8125rem;
  line-height: 1.55;
}

.case-detail-list li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--text-muted);
  font-weight: 700;
}

@media (max-width: 900px) {
  .work-card-body {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ---- Process Timeline ---- */
.process-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 48px;
  justify-content: center;
}

.process-step-label {
  padding: 10px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.process-step-label:not(:last-child)::after {
  content: '→';
  margin-left: 18px;
  color: var(--text-muted);
  font-weight: 400;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.process-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.process-phase {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.process-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.process-list {
  margin-bottom: 16px;
}

.process-list li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.process-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 4px;
  height: 4px;
  background: var(--accent-light);
  border-radius: 50%;
}

.process-outcome {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--success);
}

/* ---- Case Studies ---- */
.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.case-preview {
  height: 200px;
  background: var(--bg-tertiary);
  position: relative;
  overflow: hidden;
}

.case-preview-inner {
  position: absolute;
  inset: 16px;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.preview-bar {
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
}

.preview-bar.short { width: 40%; }
.preview-bar.medium { width: 65%; }

.preview-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: auto;
}

.preview-metric {
  height: 36px;
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
}

.case-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.case-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  background: var(--accent-soft);
  color: var(--accent-light);
  border-radius: 100px;
}

.case-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.35;
}

.case-body p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 20px;
}

.case-metrics-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  margin-bottom: 20px;
}

.case-metric-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--accent-light);
}

.case-metric-item span {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ---- Principles ---- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.principle-card {
  padding: 28px 20px;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.principle-card:hover {
  border-color: var(--accent-light);
  background: var(--accent-soft);
}

.principle-number {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent-light);
  opacity: 0.5;
  margin-bottom: 12px;
}

.principle-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
}

/* ---- Leadership ---- */
.leadership-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.leadership-item {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.leadership-item h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.leadership-item p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ---- Testimonials ---- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-quote::before {
  content: '"';
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--accent-light);
  opacity: 0.3;
  line-height: 0;
  display: block;
  margin-bottom: 8px;
}

.testimonial-author strong {
  display: block;
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

.testimonial-author span {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* ---- UX Engineering ---- */
.ux-eng-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.skill-tag {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ---- About ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
}

.about-photo {
  aspect-ratio: 4/5;
  background: var(--bg-tertiary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--text-muted);
  overflow: hidden;
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-photo--circle {
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-lg), 0 0 40px var(--accent-glow);
  max-width: 360px;
  margin: 0 auto;
}

.about-photo--circle img {
  border-radius: 50%;
}

.about-content p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.about-highlight {
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.about-highlight strong {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 4px;
}

.about-highlight span {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

/* ---- Contact ---- */
.contact-section {
  background: var(--gradient-subtle);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: var(--accent-light);
  transform: translateX(4px);
}

.contact-cta-box {
  padding: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.contact-cta-box h3 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.contact-cta-box p {
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.contact-cta-box .btn { width: 100%; max-width: 280px; }

/* ---- Footer ---- */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border-color);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--accent-light); }

/* ---- Sections ---- */
.section {
  padding: var(--section-gap) 0;
}

.section-compact { padding: 80px 0; }

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Case Study Pages ---- */
.page-hero {
  padding: calc(var(--nav-height) + 64px) 0 64px;
  background: var(--gradient-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.page-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  max-width: 800px;
}

.page-hero-summary {
  font-size: 1.1875rem;
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.75;
  margin-bottom: 32px;
}

.page-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}

.page-metric strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent-light);
}

.page-metric span {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.cs-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.cs-section:last-of-type { border-bottom: none; }

.cs-section h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-bottom: 20px;
}

.cs-section p,
.cs-section li {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.cs-section p { margin-bottom: 16px; }

.cs-section ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

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

.cs-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.cs-overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 16px;
}

.cs-overview-block {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.cs-overview-block--problem {
  border-left: 4px solid var(--warning);
}

.cs-overview-block--solution {
  border-left: 4px solid var(--accent-light);
}

.cs-overview-block h2 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.cs-overview-block--problem h2 {
  color: var(--warning);
}

.cs-overview-block ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.cs-overview-block li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.65;
  padding: 6px 0 6px 18px;
  position: relative;
}

.cs-overview-block li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
}

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

.insight-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.insight-card {
  padding: 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.insight-card h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--accent-light);
}

.insight-card p {
  font-size: 0.9375rem;
  margin: 0;
}

.results-banner {
  padding: 48px;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent-light) 25%, transparent);
  border-radius: var(--radius-xl);
  margin-top: 32px;
}

.results-banner h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 24px;
}

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

.result-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2.25rem;
  color: var(--accent-light);
  margin-bottom: 4px;
}

.result-item span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.cs-nav-footer {
  padding: 48px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  :root { --section-gap: 80px; }

  .bento-grid-3,
  .case-studies-grid,
  .process-grid,
  .leadership-grid,
  .testimonials-grid,
  .principles-grid { grid-template-columns: repeat(2, 1fr); }

  .bento-card.span-2 { grid-column: span 1; }
  .principles-grid { grid-template-columns: repeat(3, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn { display: none; }
  .mobile-menu-btn { display: flex; }

  .hero-metrics { grid-template-columns: 1fr; }
  .bento-grid-3,
  .bento-grid-2,
  .case-studies-grid,
  .process-grid,
  .leadership-grid,
  .testimonials-grid,
  .principles-grid,
  .about-highlights,
  .cs-two-col,
  .insight-cards,
  .results-grid { grid-template-columns: 1fr; }

  .process-flow { flex-direction: column; align-items: stretch; }
  .process-step-label:not(:last-child)::after { display: none; }

  .section { padding: 64px 0; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in { opacity: 1; transform: none; }
}

/* ---- Cross-browser compatibility ---- */
@supports not (aspect-ratio: 1 / 1) {
  .hero-photo::before,
  .about-photo--circle::before {
    content: '';
    display: block;
    padding-top: 100%;
  }
}

@supports not (color-mix(in srgb, black, white)) {
  .navbar {
    background: rgba(250, 250, 250, 0.85);
  }
  [data-theme="dark"] .navbar {
    background: rgba(9, 9, 11, 0.85);
  }
  .hero-badge {
    border-color: rgba(99, 102, 241, 0.2);
  }
}

@supports not (inset: 0) {
  .mobile-nav {
    top: var(--nav-height);
    right: 0;
    bottom: 0;
    left: 0;
  }
  .case-preview-inner {
    position: absolute;
    top: 16px;
    right: 16px;
    bottom: 16px;
    left: 16px;
  }
  .hero-photo-ring,
  .hero-photo-glow {
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
  }
}

/* Safari fixes */
@supports (-webkit-touch-callout: none) {
  .metric-value {
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

/* IE11 graceful degradation */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
  .hero-grid,
  .case-studies-grid,
  .bento-grid,
  .process-grid,
  .leadership-grid,
  .about-grid,
  .contact-grid {
    display: flex;
    flex-wrap: wrap;
  }
  .hero-grid > *,
  .case-studies-grid > *,
  .bento-grid > *,
  .process-grid > *,
  .leadership-grid > *,
  .about-grid > *,
  .contact-grid > * {
    flex: 1 1 300px;
  }
}

/* ---- UI Mockup Styles ---- */
.ui-mockup {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 32px 0;
  box-shadow: var(--shadow-md);
}

.ui-mockup-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ui-mockup-dots {
  display: flex;
  gap: 6px;
}

.ui-mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
}

.ui-mockup-dot:first-child {
  background: #ef4444;
}

.ui-mockup-dot:nth-child(2) {
  background: #f59e0b;
}

.ui-mockup-dot:nth-child(3) {
  background: #22c55e;
}

.ui-mockup-body {
  padding: 24px;
  background: var(--bg-card);
}

.ui-mockup-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* Dashboard Mockup */
.dashboard-mockup {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 16px;
  min-height: 320px;
}

.dashboard-sidebar {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
}

.sidebar-item {
  height: 12px;
  background: var(--border-color);
  border-radius: 4px;
  margin-bottom: 12px;
  width: 80%;
}

.sidebar-item:last-child {
  margin-bottom: 0;
  width: 60%;
}

.dashboard-main {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto 1fr;
  gap: 12px;
}

.dashboard-metric {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  height: 80px;
}

.dashboard-chart {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  grid-column: 1 / -1;
  height: 140px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 16px;
}

.chart-bar {
  flex: 1;
  background: var(--accent-soft);
  border-radius: 4px 4px 0 0;
  transition: height 0.3s ease;
}

.chart-bar:nth-child(1) { height: 40%; }
.chart-bar:nth-child(2) { height: 65%; }
.chart-bar:nth-child(3) { height: 50%; }
.chart-bar:nth-child(4) { height: 85%; }
.chart-bar:nth-child(5) { height: 70%; }
.chart-bar:nth-child(6) { height: 90%; }
.chart-bar:nth-child(7) { height: 55%; }

/* AI Copilot Mockup */
.copilot-mockup {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  min-height: 280px;
}

.copilot-main {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 20px;
}

.copilot-suggestion {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 12px;
}

.copilot-sidebar {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
}

.confidence-badge {
  display: inline-block;
  background: var(--success);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 8px;
}

/* Design System Mockup */
.design-system-mockup {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 16px;
  min-height: 300px;
}

.ds-sidebar {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
}

.ds-component-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.ds-component {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  height: 100px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ds-component-preview {
  flex: 1;
  background: var(--bg-tertiary);
  border-radius: 4px;
}

.ds-component-label {
  height: 10px;
  background: var(--border-color);
  border-radius: 4px;
  width: 60%;
}

/* Migration Portal Mockup */
.migration-mockup {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
  min-height: 320px;
}

.migration-steps {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
}

.step-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

.step-item:last-child {
  border-bottom: none;
}

.step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
}

.step-number.completed {
  background: var(--success);
}

.step-number.pending {
  background: var(--border-color);
  color: var(--text-secondary);
}

.step-label {
  flex: 1;
  height: 10px;
  background: var(--border-color);
  border-radius: 4px;
  width: 80%;
}

.migration-main {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 20px;
}

.cost-estimate {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.cost-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

/* Service Portal Mockup */
.portal-mockup {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  min-height: 280px;
}

.portal-search {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  gap: 12px;
  align-items: center;
}

.search-input {
  flex: 1;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0 16px;
}

.portal-results {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.result-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
}

.result-title {
  height: 12px;
  background: var(--border-color);
  border-radius: 4px;
  width: 70%;
  margin-bottom: 8px;
}

.result-desc {
  height: 10px;
  background: var(--border-color);
  border-radius: 4px;
  width: 90%;
  margin-bottom: 8px;
}

.result-desc:last-child {
  width: 60%;
}

/* Data Platform Mockup */
.data-mockup {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  min-height: 300px;
}

.data-sidebar {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
}

.data-main {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
}

.data-search {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  gap: 12px;
}

.data-table {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.table-header {
  height: 12px;
  background: var(--accent);
  border-radius: 4px;
}

.table-cell {
  height: 10px;
  background: var(--border-color);
  border-radius: 4px;
}

/* Before/After Mockup */
.before-after-mockup {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 16px;
}

.before-col, .after-col {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 20px;
}

.before-label, .after-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.before-btn {
  height: 36px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.btn-a { background: #2563eb; width: 100px; }
.btn-b { background: #0d6efd; border-radius: 4px; width: 110px; }
.btn-c { background: #6200ee; text-transform: uppercase; width: 90px; }
.btn-d { background: #ff6b6b; border: 2px solid #ff4757; width: 105px; }

.after-variants {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.after-variant {
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
}

.after-variant.primary {
  background: var(--accent);
  color: white;
}

.after-variant.secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.after-variant.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.after-variant.danger {
  background: #dc2626;
  color: white;
}

/* Token Architecture */
.token-architecture {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
}

.token-tier {
  flex: 1;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  min-width: 0;
}

.token-tier-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.token-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.token-swatch {
  aspect-ratio: 1;
  border-radius: 6px;
}

.token-names {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.token-names span {
  font-size: 0.625rem;
  color: var(--text-muted);
  font-family: monospace;
}

.token-arrow {
  font-size: 1.5rem;
  color: var(--accent);
  font-weight: 700;
  align-self: center;
}

.token-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.token-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 0.75rem;
  font-family: monospace;
  color: var(--text-secondary);
}

/* Governance Workflow */
.governance-flow {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
}

.governance-step {
  flex: 1;
  text-align: center;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.governance-arrow {
  color: var(--accent);
  font-weight: 700;
}

@media (max-width: 768px) {
  .dashboard-mockup,
  .copilot-mockup,
  .design-system-mockup,
  .migration-mockup,
  .data-mockup {
    grid-template-columns: 1fr;
  }
  
  .dashboard-main,
  .ds-component-grid,
  .portal-results {
    grid-template-columns: 1fr;
  }
  
  .data-table {
    grid-template-columns: 1fr;
  }
  
  .before-after-mockup,
  .token-architecture {
    grid-template-columns: 1fr;
  }
  
  .token-architecture {
    flex-direction: column;
  }
  
  .token-arrow {
    transform: rotate(90deg);
  }
  
  .governance-flow {
    flex-direction: column;
  }
  
  .governance-arrow {
    transform: rotate(90deg);
  }
}