/* ================================================================
   Joe K. Tung MD MBA — style.css
   Academic Editorial Redesign
   ================================================================ */

/* ── Design Tokens ── */
:root {
  /* Colors */
  --c-bg:         #FAFAF8;
  --c-surface:    #F3F2EF;
  --c-dark:       #0E0D0C;
  --c-dark-2:     #1A1917;
  --c-border:     #E2DDD7;
  --c-border-lt:  #ECEAE5;
  --c-ink:        #0E0D0C;
  --c-text:       #2A2825;
  --c-muted:      #6D675E;
  --c-subtle:     #A09890;
  --c-accent:     #3A6B5F;
  --c-accent-lt:  #5A8F82;
  --c-accent-dk:  #264A41;
  --c-accent-bg:  #EDF3F1;
  --c-gold:       #C9A84C;
  --c-white:      #FFFFFF;

  /* Type */
  --serif: 'DM Serif Display', Georgia, serif;
  --sans:  'DM Sans', system-ui, -apple-system, sans-serif;

  /* Layout */
  --nav-h:      68px;
  --max-w:      1200px;
  --pad-x:      clamp(1.5rem, 4vw, 3rem);
  --section-y:  clamp(3.5rem, 6.5vw, 6rem);

  /* Motion */
  --ease:  cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --fast:  0.2s;
  --mid:   0.35s;

  /* Shadows — very restrained */
  --shadow-sm: 0 1px 8px rgba(14,13,12,0.06);
  --shadow-md: 0 4px 24px rgba(14,13,12,0.08);
  --shadow-lg: 0 12px 48px rgba(14,13,12,0.1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
body {
  font-family: var(--sans);
  font-size: clamp(0.9rem, 1.05vw, 1rem);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Typography ── */
h1, h2 {
  font-family: var(--serif);
  color: var(--c-ink);
  font-weight: 400;
  text-wrap: balance;
}
h1 {
  font-size: clamp(3.2rem, 7.5vw, 6.8rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
}
h2 {
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
h3 {
  font-family: var(--sans);
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

/* ── Layout Utilities ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

section { padding: var(--section-y) 0; }
.section-alt { background: var(--c-surface); }

.section-label {
  display: block;
  font-family: var(--sans);
  font-size: 1.56rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--c-accent);
  margin-bottom: 1.1rem;
}

.section-title { margin-bottom: 3rem; }

.section-intro {
  max-width: 640px;
  font-size: clamp(0.92rem, 1.05vw, 1rem);
  color: var(--c-muted);
  line-height: 1.8;
  margin-bottom: 3rem;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.75rem 1.65rem;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all var(--mid) var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-accent);
  color: var(--c-white);
  border: 1.5px solid var(--c-accent);
}
.btn-primary:hover {
  background: var(--c-accent-dk);
  border-color: var(--c-accent-dk);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(58,107,95,0.25);
}

.btn-outline {
  background: transparent;
  color: var(--c-ink);
  border: 1.5px solid var(--c-border);
}
.btn-outline:hover {
  border-color: var(--c-ink);
  background: var(--c-ink);
  color: var(--c-white);
  transform: translateY(-1px);
}

.btn-full { width: 100%; justify-content: center; }

/* ── Navigation ── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--mid) var(--ease),
              border-color var(--mid) var(--ease),
              box-shadow var(--mid) var(--ease);
}
#navbar.scrolled {
  background: rgba(250, 250, 248, 0.97);
  border-color: var(--c-border-lt);
  box-shadow: 0 1px 0 rgba(14,13,12,0.05);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-logo {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ink);
  flex-shrink: 0;
  transition: color var(--fast) var(--ease);
}
.nav-logo:hover { color: var(--c-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  margin-left: auto;
}

.nav-links a {
  position: relative;
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
  padding: 0.55rem 0.9rem;
  transition: color var(--fast) var(--ease);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0.25rem;
  left: 0.9rem; right: 0.9rem;
  height: 1px;
  background: var(--c-ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--mid) var(--ease);
}
.nav-links a:hover { color: var(--c-ink); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta {
  margin-left: 0.75rem;
  padding: 0.48rem 1.1rem;
  font-size: 0.68rem;
  background: var(--c-accent) !important;
  color: var(--c-white) !important;
  border-color: var(--c-accent) !important;
}
.nav-cta:hover {
  background: var(--c-accent-dk) !important;
  border-color: var(--c-accent-dk) !important;
  color: var(--c-white) !important;
  transform: none;
}

/* Nav active section link */
.nav-links a.active {
  color: var(--c-ink);
}
.nav-links a.active::after {
  transform: scaleX(1);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.4rem;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-ink);
  transition: all 0.3s var(--ease);
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── Hero — contained two-column ── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--c-bg);
  padding: var(--nav-h) 0 4rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 38%;
  gap: 4rem;
  align-items: center;
}

.hero-content { /* left column text */ }

.hero-photo-wrap {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  max-height: 600px;
  box-shadow: var(--shadow-lg);
  background: var(--c-surface);
}

.hero-photo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 12%;
  display: block;
  transition: transform 8s ease;
}
.hero-photo-wrap:hover img { transform: scale(1.03); }

.photo-placeholder {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 5rem;
  color: var(--c-subtle);
}

.eyebrow {
  display: block;
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--c-muted);
  margin-bottom: 1.4rem;
}

.hero-content h1 { margin-bottom: 1.25rem; }

.hero-line { display: block; }

.hero-subtitle {
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--c-muted);
  letter-spacing: 0.06em;
  margin-bottom: 1.5rem;
}

.hero-tagline {
  font-size: clamp(0.9rem, 1vw, 0.98rem);
  color: var(--c-text);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  max-width: 480px;
}

.tagline-titles {
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.4;
}

.tagline-institution {
  font-style: italic;
  color: var(--c-muted);
  font-size: 0.95em;
  line-height: 1.4;
}

.tagline-mission {
  color: var(--c-text);
  font-size: 0.88em;
  line-height: 1.7;
  margin-top: 0.4rem;
}

.hero-ctas { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ── Philosophy Stripe ── */
#philosophy {
  background: var(--c-dark);
  padding: clamp(4.5rem, 9vw, 8rem) 0;
  overflow-x: hidden;
}

.philosophy-inner {
  display: grid;
  grid-template-columns: 1px 1fr;
  gap: 0 3rem;
  align-items: start;
}

.philosophy-rule {
  width: 1px;
  height: 100%;
  min-height: 100px;
  background: var(--c-accent);
  opacity: 0.6;
  margin-top: 0.35rem;
}

#philosophy blockquote {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  font-style: italic;
  color: rgba(250, 250, 248, 0.92);
  line-height: 1.55;
  letter-spacing: -0.01em;
  text-wrap: auto;
}

/* ── Stats Bar ── */
#stats {
  background: var(--c-surface);
  padding: 0;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.stats-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat-item {
  padding: 3rem 2rem;
  border-right: 1px solid var(--c-border);
  text-align: center;
}
.stat-item:last-child { border-right: none; }

.stat-number {
  display: block;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  color: var(--c-ink);
  line-height: 1;
  margin-bottom: 0.65rem;
  letter-spacing: -0.025em;
}

.stat-label {
  font-family: var(--sans);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--c-muted);
  line-height: 1.5;
}
.stat-label small {
  display: block;
  font-size: 0.58rem;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--c-subtle);
  margin-top: 0.15rem;
}

/* ── Logo Strip ── */
#logo-strip {
  background: var(--c-bg);
  padding: 2.25rem 0;
  border-bottom: 1px solid var(--c-border);
}

.logo-strip-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-muted);
  text-align: center;
  margin-bottom: 2rem;
}

.logo-strip-items {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}

.logo-strip-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-right: 1px solid var(--c-border);
  opacity: 0.5;
  transition: opacity var(--fast) var(--ease);
}
.logo-strip-item:last-child { border-right: none; }
.logo-strip-item:hover { opacity: 0.85; }

/* Fixed-width wrapper so all logos take identical horizontal space */
.inst-badge-wrap {
  width: 52px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.inst-badge {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.logo-strip-item span {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-ink);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

@media (max-width: 900px) {
  .logo-strip-items {
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--c-border);
    border: 1px solid var(--c-border);
  }
  .logo-strip-item {
    border-right: none;
    background: var(--c-bg);
    padding: 1rem;
  }
}

/* ── About ── */
#about { background: var(--c-surface); }

.about-bio {
  max-width: 740px;
  margin-bottom: 4.5rem;
}
.about-bio p {
  font-size: clamp(0.92rem, 1.05vw, 1.02rem);
  line-height: 1.85;
  color: var(--c-text);
  margin-bottom: 1.4rem;
}
.about-bio p:last-child { margin-bottom: 0; }

.about-bottom {
  display: block;
  max-width: 740px;
}

.about-education-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--c-accent);
  margin-bottom: 1.6rem;
}

.education-list { display: flex; flex-direction: column; gap: 1.25rem; }

.education-list li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-left: 1.25rem;
  border-left: 1.5px solid var(--c-accent);
}

.edu-school {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.02rem;
  color: var(--c-ink);
  line-height: 1.25;
}
.edu-degree {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--c-muted);
  line-height: 1.4;
}

.board-cert {
  margin-top: 1.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--c-muted);
}
.board-cert svg { color: var(--c-accent); flex-shrink: 0; }

.about-sidebar { display: flex; flex-direction: column; gap: 1.25rem; }

.penguins-badge {
  background: var(--c-dark);
  border-radius: 2px;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-md);
}
.penguins-icon {
  width: 44px; height: 44px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--c-gold);
}
.penguins-role {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.85rem;
  color: rgba(250,250,248,0.92);
  line-height: 1.2;
  letter-spacing: 0.02em;
}
.penguins-team {
  font-size: 0.75rem;
  color: rgba(250,250,248,0.45);
  margin-top: 0.2rem;
}

.about-quick-facts {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 2px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.quick-fact {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.8rem;
  color: var(--c-muted);
  line-height: 1.5;
}
.quick-fact svg { color: var(--c-accent); flex-shrink: 0; margin-top: 2px; }

/* ── Expertise — Clean List Rows ── */
#expertise { background: var(--c-bg); }

.expertise-list {
  border-top: 1px solid var(--c-border);
}

.expertise-row {
  display: grid;
  grid-template-columns: minmax(240px, 38%) 1fr;
  gap: 3rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--c-border-lt);
  align-items: start;
  transition: background var(--fast) var(--ease);
}
.expertise-row:hover {
  background: transparent;
}

.expertise-label {
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.expertise-num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.6rem;
  color: var(--c-accent);
  opacity: 0.55;
  flex-shrink: 0;
  line-height: 1;
}

.expertise-row h3 {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--c-ink);
  margin: 0;
  line-height: 1;
}

.expertise-desc {
  font-size: clamp(0.88rem, 1vw, 0.96rem);
  color: var(--c-muted);
  line-height: 1.8;
  padding-top: 0.15rem;
}

/* ── Speaking & Media ── */
#speaking { background: var(--c-surface); }

.speaking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
}

.speaking-col-label {
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--c-accent);
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--c-border);
}
.topics-heading { margin-top: 2.5rem; }

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

.press-list li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--c-border-lt);
  transition: padding-left var(--fast) var(--ease);
}
.press-list li:last-child { border-bottom: none; }
.press-list li:hover { padding-left: 0.5rem; }

.press-outlet {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
}
.press-title {
  font-size: 0.88rem;
  color: var(--c-ink);
  line-height: 1.45;
}
.press-year {
  font-size: 0.7rem;
  color: var(--c-subtle);
}

.presentations-summary {
  font-size: 0.92rem;
  color: var(--c-text);
  line-height: 1.8;
}

.topic-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
  margin-bottom: 1.5rem;
}
.chip {
  display: inline-block;
  background: transparent;
  color: var(--c-muted);
  border: 1px solid var(--c-border);
  padding: 0.28rem 0.85rem;
  border-radius: 2px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all var(--fast) var(--ease);
}
.chip:hover {
  background: var(--c-accent-bg);
  border-color: var(--c-accent);
  color: var(--c-accent-dk);
}

.speaking-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-accent);
  transition: gap var(--fast) var(--ease), color var(--fast) var(--ease);
}
.speaking-cta:hover { gap: 0.7rem; color: var(--c-accent-dk); }

/* ── Publications ── */
#publications { background: var(--c-bg); }

.publications-list {
  counter-reset: pub-counter;
  margin-bottom: 2.5rem;
}
.publications-list li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.4rem 0 1.4rem 3rem;
  border-bottom: 1px solid var(--c-border-lt);
  position: relative;
  counter-increment: pub-counter;
  transition: padding-left var(--fast) var(--ease);
}
.publications-list li:first-child { border-top: 1px solid var(--c-border-lt); }
.publications-list li:hover { padding-left: 3.5rem; }

.publications-list li::before {
  content: counter(pub-counter, decimal-leading-zero);
  position: absolute;
  left: 0; top: 1.55rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--c-accent);
  width: 2.2rem;
  text-align: right;
}

.publications-list a {
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--c-ink);
  line-height: 1.55;
  transition: color var(--fast) var(--ease);
}
.publications-list a:hover { color: var(--c-accent); }

.pub-meta {
  font-size: 0.76rem;
  color: var(--c-subtle);
}
.pub-hidden { display: none; }
.pub-hidden.visible { display: flex; }

.pub-footer {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}
.pub-external-links { display: flex; gap: 1.5rem; }
.pub-external-links a {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-accent);
  transition: color var(--fast) var(--ease);
}
.pub-external-links a:hover { color: var(--c-accent-dk); }

/* ── Testimonials ── */
#testimonials { background: var(--c-surface); }
#reviews { background: var(--c-surface); }

.reviews-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.rating-badge {
  text-align: center;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 2px;
  padding: 1.25rem 2rem;
  box-shadow: var(--shadow-sm);
  min-width: 180px;
}
.rating-stars { color: var(--c-gold); font-size: 0.95rem; letter-spacing: 0.08em; margin-bottom: 0.35rem; }
.rating-score {
  font-family: var(--serif);
  font-size: 2.4rem;
  color: var(--c-ink);
  line-height: 1;
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}
.rating-denom { font-size: 0.88rem; color: var(--c-muted); }
.rating-count { font-size: 0.72rem; color: var(--c-subtle); margin-bottom: 0.75rem; }
.rating-source {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-accent);
  transition: color var(--fast) var(--ease);
}
.rating-source:hover { color: var(--c-accent-dk); }

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--c-border);
  border: 1px solid var(--c-border);
}
.review-card {
  background: var(--c-surface);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background var(--mid) var(--ease);
}
.review-card:hover { background: var(--c-white); }
.review-stars { color: var(--c-gold); font-size: 0.8rem; letter-spacing: 0.06em; }
.review-card blockquote {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--c-ink);
  line-height: 1.75;
  flex: 1;
}
.review-date {
  font-size: 0.68rem;
  color: var(--c-subtle);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── Affiliations ── */
#affiliations { background: var(--c-bg); padding: 4rem 0; }

.affiliations-list {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
}
.affiliations-list span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-ink);
  opacity: 0.4;
  padding: 0.3rem 0.85rem;
  border: 1px solid var(--c-border);
  border-radius: 2px;
  transition: opacity var(--fast), border-color var(--fast);
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.affiliations-list span:hover { opacity: 0.85; border-color: var(--c-accent); }

/* ── Contact ── */
#contact { background: var(--c-surface); }

.contact-inner {
  display: block;
  max-width: 640px;
}
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }

label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}
.optional { font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--c-subtle); }

input, textarea {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--c-ink);
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: 2px;
  padding: 0.75rem 1rem;
  transition: border-color var(--fast), box-shadow var(--fast);
  outline: none;
  width: 100%;
}
input:focus, textarea:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(58,107,95,0.1);
}
textarea { resize: vertical; min-height: 130px; line-height: 1.65; }
input::placeholder, textarea::placeholder { color: var(--c-subtle); }

.hidden-field { display: none !important; }
.form-success {
  display: none;
  align-items: center;
  gap: 0.6rem;
  background: var(--c-accent-bg);
  color: var(--c-accent-dk);
  border: 1px solid rgba(58,107,95,0.2);
  border-radius: 2px;
  padding: 0.9rem 1.2rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.contact-info { padding-top: 0.5rem; display: flex; flex-direction: column; gap: 1.75rem; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  font-size: 0.85rem;
  color: var(--c-muted);
  line-height: 1.5;
}
.contact-item svg { color: var(--c-accent); flex-shrink: 0; margin-top: 2px; }
.contact-item a {
  color: var(--c-accent);
  font-weight: 500;
  transition: color var(--fast);
}
.contact-item a:hover { color: var(--c-accent-dk); }

/* ── Footer ── */
#footer {
  background: var(--c-dark);
  padding: 2rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-copy { font-size: 0.75rem; color: rgba(250,250,248,0.35); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(250,250,248,0.5);
  transition: color var(--fast);
}
.footer-links a:hover { color: rgba(250,250,248,0.85); }
.footer-top {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(250,250,248,0.3);
  transition: color var(--fast);
}
.footer-top:hover { color: rgba(250,250,248,0.7); }

/* ── Floating back-to-top ── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 900;
  width: auto;
  height: 40px;
  padding: 0 1rem;
  background: var(--c-dark);
  color: rgba(250,250,248,0.75);
  border: none;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--mid) var(--ease), transform var(--mid) var(--ease), background var(--fast) var(--ease);
  pointer-events: none;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover { background: var(--c-accent); color: var(--c-white); }

/* ── Data-reveal initial state ── */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
}

/* ── Responsive ── */
@media (max-width: 1100px) {
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .speaking-grid { grid-template-columns: 1fr; gap: 3.5rem; }
  .expertise-row { grid-template-columns: 1fr; gap: 0.6rem; }
  .philosophy-inner { display: block; }
  .philosophy-rule { display: none; }
  #philosophy blockquote { font-size: clamp(1.2rem, 4.5vw, 1.6rem); width: 100%; max-width: 100%; }
}

@media (max-width: 768px) {
  /* Mobile Nav */
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(250,250,248,0.98);
    border-bottom: 1px solid var(--c-border);
    flex-direction: column;
    padding: 1.25rem var(--pad-x);
    gap: 0;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.7rem 0; font-size: 0.82rem; }
  .nav-links a::after { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-inner { position: relative; }

  /* Hero — stacked */
  #hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  #hero {
    align-items: flex-start;
    padding-bottom: 3rem;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-photo-wrap {
    aspect-ratio: 4 / 3;
    max-height: 300px;
    order: -1;
  }
  .hero-ctas { justify-content: flex-start; }

  /* Stats */
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-right: none; border-bottom: 1px solid var(--c-border); }
  .stat-item:nth-child(odd) { border-right: 1px solid var(--c-border); }
  .stat-item:nth-child(3),
  .stat-item:nth-child(4) { border-bottom: none; }

  /* Form */
  .form-row { grid-template-columns: 1fr; }

  /* Back to top */
  .back-to-top { bottom: 1.25rem; right: 1.25rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.1rem; }
  section { padding: clamp(2rem, 5vw, 3rem) 0; }
  .logo-strip-items { grid-template-columns: 1fr; }
  .logo-strip-item {
    border-right: none;
    border-bottom: 1px solid var(--c-border);
    justify-content: flex-start;
    padding: 0.65rem 1rem;
  }
  .logo-strip-item:last-child { border-bottom: none; }
  .inst-badge-wrap { width: 38px; height: 30px; }
  .logo-strip-item span { font-size: 0.8rem; }
  .reviews-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
}