:root {
  --persona-bg: #f7f9fc;
  --persona-card: rgba(255, 255, 255, 0.88);
  --persona-card-solid: #ffffff;
  --persona-ink: #0f172a;
  --persona-muted: #5b6472;
  --persona-body: #334155;
  --persona-line: #e5eaf1;
  --persona-line-strong: #d8e2f5;
  --persona-accent: #4067D9;
  --persona-accent-2: #6f8cff;
  --persona-accent-soft: #eef3ff;
  --persona-radius-lg: 26px;
  --persona-radius-md: 18px;
  --persona-radius-sm: 12px;
  --persona-shadow-sm: 0 10px 24px rgba(17, 24, 39, 0.06);
  --persona-shadow-md: 0 18px 40px rgba(17, 24, 39, 0.08);
  --persona-shadow-lg: 0 30px 72px rgba(17, 24, 39, 0.12);
}

#persona.persona-section {
  position: relative;
  overflow: clip;
  padding: clamp(48px, 6vw, 92px) 0;
  color: var(--persona-ink);
  background:
    radial-gradient(circle at 10% 10%, rgba(64, 103, 217, 0.04), transparent 24%),
    radial-gradient(circle at 88% 18%, rgba(64, 103, 217, 0.05), transparent 22%);
}

#persona .persona-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 32px);
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  align-items: start;
}

/* sidebar */
#persona .persona-sidebar {
  position: sticky;
  top: 24px;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(248,250,255,0.92) 100%);
  border: 1px solid var(--persona-line);
  border-radius: var(--persona-radius-lg);
  padding: 18px;
  box-shadow: var(--persona-shadow-sm);
  transition:
    transform 0.28s cubic-bezier(.2,.7,.2,1),
    box-shadow 0.28s cubic-bezier(.2,.7,.2,1),
    border-color 0.28s ease,
    background 0.28s ease;
}

#persona .persona-sidebar::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(64, 103, 217, 0.09), transparent 34%);
  opacity: 0.9;
  z-index: -1;
  pointer-events: none;
}

#persona .persona-sidebar:hover {
  transform: translateY(-4px);
  box-shadow: var(--persona-shadow-lg);
  border-color: var(--persona-line-strong);
  background: var(--persona-card-solid);
}

/* photo */
#persona .persona-photo {
  margin: 0 0 18px;
  border-radius: 20px;
  overflow: hidden;
  background: linear-gradient(180deg, #f4f7ff 0%, #edf3ff 100%);
  border: 1px solid #dbe4ff;
  aspect-ratio: 1 / 1;
  box-shadow: 0 10px 24px rgba(64, 103, 217, 0.08);
}

#persona .persona-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s cubic-bezier(.2,.7,.2,1), filter 0.35s ease;
}

#persona .persona-sidebar:hover .persona-photo img {
  transform: scale(1.03);
}

#persona .persona-photo.is-missing {
  display: grid;
  place-items: center;
  min-height: 260px;
  background: linear-gradient(135deg, #f4f7ff 0%, #e7edff 100%);
  color: #41506f;
  border: 1px dashed #bfd0ff;
  font-size: 13px;
}

#persona .persona-photo.is-missing::after {
  content: "Portrait unavailable";
  font-weight: 600;
}

/* identity */
#persona .persona-identity {
  margin-bottom: 16px;
  display: grid;
  gap: 6px;
}

#persona .persona-eyebrow {
  margin: 0;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(64, 103, 217, 0.12);
  box-shadow: 0 8px 18px rgba(17, 24, 39, 0.04);
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--persona-accent);
  font-weight: 800;
}

#persona .persona-name {
  margin: 0;
  font-size: clamp(24px, 2vw, 30px);
  line-height: 1.08;
  font-weight: 800;
  color: var(--persona-ink);
  letter-spacing: -0.02em;
}

/* facts */
#persona .persona-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

#persona .persona-facts li {
  display: grid;
  gap: 4px;
  padding: 13px 14px;
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--persona-line);
  border-radius: 14px;
  transition:
    transform 0.24s cubic-bezier(.2,.7,.2,1),
    border-color 0.24s ease,
    background 0.24s ease,
    box-shadow 0.24s ease;
}

#persona .persona-facts li:hover {
  transform: translateY(-2px);
  border-color: #d3ddff;
  background: #ffffff;
  box-shadow: 0 12px 24px rgba(64, 103, 217, 0.07);
}

#persona .persona-facts span {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--persona-muted);
  font-weight: 800;
}

#persona .persona-facts strong {
  font-size: 14px;
  line-height: 1.5;
  color: var(--persona-ink);
  font-weight: 700;
}

/* quote */
#persona .persona-quote {
  margin: 18px 0 0;
  position: relative;
  overflow: hidden;
  padding: 18px 18px 18px 20px;
  background: linear-gradient(180deg, rgba(238,243,255,0.95) 0%, rgba(245,248,255,0.98) 100%);
  border: 1px solid #dbe4ff;
  border-radius: 18px;
  box-shadow: 0 10px 22px rgba(64, 103, 217, 0.05);
}

#persona .persona-quote::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--persona-accent), var(--persona-accent-2));
}

#persona .persona-quote::after {
  content: "”";
  position: absolute;
  right: 16px;
  top: 6px;
  font-size: 56px;
  line-height: 1;
  color: rgba(64, 103, 217, 0.12);
  font-weight: 800;
}

#persona .persona-quote blockquote {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: #23304d;
  font-style: italic;
  position: relative;
  z-index: 1;
}

/* main */
#persona .persona-main {
  display: grid;
  gap: 18px;
}

#persona .persona-header {
  padding: 8px 2px 4px;
  animation: personaIntroUp 0.72s cubic-bezier(.2,.7,.2,1) both;
}

#persona .persona-kicker {
  margin: 0 0 8px;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(64, 103, 217, 0.12);
  box-shadow: 0 8px 18px rgba(17, 24, 39, 0.04);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--persona-accent);
  font-weight: 800;
}

#persona .persona-header h3 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--persona-ink);
  text-wrap: balance;
}

/* cards grid */
#persona .persona-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

#persona .persona-card {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: var(--persona-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--persona-line);
  border-radius: var(--persona-radius-md);
  padding: 20px;
  box-shadow: var(--persona-shadow-sm);
  transition:
    transform 0.28s cubic-bezier(.2,.7,.2,1),
    box-shadow 0.28s cubic-bezier(.2,.7,.2,1),
    border-color 0.28s ease,
    background 0.28s ease;
}

#persona .persona-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(64, 103, 217, 0.1), transparent 36%);
  opacity: 0;
  transition: opacity 0.28s ease;
  z-index: -1;
}

#persona .persona-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--persona-accent), var(--persona-accent-2));
  transform: scaleY(0.24);
  transform-origin: top;
  opacity: 0.35;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#persona .persona-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--persona-shadow-lg);
  border-color: var(--persona-line-strong);
  background: var(--persona-card-solid);
}

#persona .persona-card:hover::before {
  opacity: 1;
}

#persona .persona-card:hover::after {
  transform: scaleY(1);
  opacity: 1;
}

#persona .persona-card--bio,
#persona .persona-card--wide {
  grid-column: 1 / -1;
}

#persona .persona-card h4 {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.2;
  font-weight: 800;
  color: var(--persona-accent);
  letter-spacing: -0.01em;
}

#persona .persona-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--persona-body);
}

#persona .persona-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

#persona .persona-card li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--persona-body);
  transition: color 0.24s ease, transform 0.24s ease;
}

#persona .persona-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--persona-accent);
  transform: translateY(-50%);
  box-shadow: 0 0 0 5px rgba(64, 103, 217, 0.08);
}

#persona .persona-card:hover li {
  color: #22314d;
  transform: translateY(-1px);
}

/* motion */
@media (prefers-reduced-motion: no-preference) {
  #persona .persona-sidebar {
    animation: personaCardIn 0.58s cubic-bezier(.2,.7,.2,1) both;
  }

  #persona .persona-card {
    animation: personaCardIn 0.58s cubic-bezier(.2,.7,.2,1) both;
  }

  #persona .persona-card:nth-child(1) { animation-delay: 0.06s; }
  #persona .persona-card:nth-child(2) { animation-delay: 0.12s; }
  #persona .persona-card:nth-child(3) { animation-delay: 0.18s; }
  #persona .persona-card:nth-child(4) { animation-delay: 0.24s; }
}

@keyframes personaIntroUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes personaCardIn {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* responsive */
@media (max-width: 980px) {
  #persona .persona-shell {
    grid-template-columns: 1fr;
  }

  #persona .persona-sidebar {
    position: static;
  }

  #persona .persona-cards {
    grid-template-columns: 1fr;
  }

  #persona .persona-card--bio,
  #persona .persona-card--wide {
    grid-column: auto;
  }
}

@media (max-width: 640px) {
  #persona.persona-section {
    padding: 34px 0 58px;
  }

  #persona .persona-shell {
    gap: 22px;
    padding: 0 20px;
  }

  #persona .persona-sidebar,
  #persona .persona-card {
    padding: 16px;
  }

  #persona .persona-photo {
    border-radius: 18px;
  }

  #persona .persona-header h3 {
    font-size: 30px;
    line-height: 1.12;
  }

  #persona .persona-name {
    font-size: 22px;
  }

  #persona .persona-card p,
  #persona .persona-card li,
  #persona .persona-quote blockquote {
    font-size: 14px;
    line-height: 1.7;
  }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  #persona .persona-sidebar,
  #persona .persona-photo img,
  #persona .persona-facts li,
  #persona .persona-card,
  #persona .persona-card::before,
  #persona .persona-card::after,
  #persona .persona-card li,
  #persona .persona-header {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}