/* ════════════════════════════════════════════════════
   DESIGN TOKENS — Matching rummanchowdhury.com palette
   ════════════════════════════════════════════════════ */
:root {
  /* Type scale (fluid) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Palette — derived from rummanchowdhury.com */
  --color-bg: #e8edf2;             /* light cool grey-blue (site's section bg) */
  --color-surface: #f2f5f8;
  --color-surface-white: #ffffff;
  --color-navy: #0d2d3e;           /* deep navy (dark card sections) */
  --color-navy-light: #1b3a4b;
  --color-text: #111111;
  --color-text-muted: #4a5568;
  --color-text-faint: #8a9ab0;
  --color-text-inverse: #ffffff;
  --color-accent: #c8a9a9;         /* blush/rose (CONTACT button) */
  --color-accent-dark: #a8888888;

  /* Harvard crimson for BKC identity moments */
  --color-harvard: #a51c30;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-ui: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(13, 45, 62, 0.08);
  --shadow-md: 0 4px 16px rgba(13, 45, 62, 0.12);
  --shadow-lg: 0 12px 40px rgba(13, 45, 62, 0.18);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 1000px;
  --content-wide: 1240px;
}

/* ════════════════════════════════════════════════════
   BASE RESET
   ════════════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}
body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}
img, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'] { list-style: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.15; }
p, li { text-wrap: pretty; }

/* ════════════════════════════════════════════════════
   NAVIGATION — white bar matching site
   ════════════════════════════════════════════════════ */
.site-header {
  display: none;
}
.site-header.header--scrolled {
  border-color: rgba(13, 45, 62, 0.08);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav-logo {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.nav-logo:hover { opacity: 0.7; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex: 1;
  justify-content: center;
}
.nav-links a {
  font-family: var(--font-ui);
  font-size: clamp(0.625rem, 0.55rem + 0.35vw, 0.75rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-text);
  text-decoration: none;
  transition: opacity var(--transition);
}
.nav-links a:hover { opacity: 0.55; }
.nav-links .nav-link-active {
  opacity: 0.45;
  pointer-events: none;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}
.nav-social {
  color: var(--color-text);
  opacity: 0.6;
  transition: opacity var(--transition);
  display: flex; align-items: center;
}
.nav-social:hover { opacity: 1; }
.nav-contact-btn {
  font-family: var(--font-ui);
  font-size: clamp(0.625rem, 0.55rem + 0.35vw, 0.75rem);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-text);
  text-decoration: none;
  border: 1.5px solid var(--color-accent);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  transition: background var(--transition), color var(--transition);
}
.nav-contact-btn:hover {
  background: var(--color-accent);
  color: var(--color-text);
}

/* ════════════════════════════════════════════════════
   HERO SECTION
   ════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 92vh;
  background: linear-gradient(135deg, var(--color-navy) 0%, #0a1f2e 60%, #16323f 100%);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 20% 50%, rgba(165, 28, 48, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 80% 30%, rgba(200, 169, 169, 0.06) 0%, transparent 50%);
  pointer-events: none;
}
/* Subtle grid texture */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: clamp(var(--space-16), 10vw, var(--space-32));
  max-width: 720px;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  font-weight: 500;
}
.eyebrow-tag {
  background: rgba(165, 28, 48, 0.3);
  color: rgba(255,255,255,0.85);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid rgba(165, 28, 48, 0.5);
}
.eyebrow-collab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.bkc-icon {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}
.hero-heading {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 500;
  color: #ffffff;
  margin-bottom: var(--space-6);
  line-height: 1.1;
}
.hero-heading em {
  font-style: italic;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.82);
}
.hero-sub {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  max-width: 55ch;
  margin-bottom: var(--space-10);
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero-visual {
  position: relative;
  z-index: 2;
  padding: var(--space-16) var(--space-16) var(--space-16) 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-badge {
  width: clamp(140px, 16vw, 200px);
  height: clamp(140px, 16vw, 200px);
  border: 1.5px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.badge-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}
.badge-logo {
  width: clamp(40px, 5vw, 56px);
  height: clamp(40px, 5vw, 56px);
  color: rgba(255, 255, 255, 0.7);
}
.badge-text {
  font-family: var(--font-ui);
  font-size: clamp(0.55rem, 0.5rem + 0.25vw, 0.65rem);
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
  max-width: 100px;
  line-height: 1.5;
}

/* ════════════════════════════════════════════════════
   BUTTONS
   ════════════════════════════════════════════════════ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  background: #ffffff;
  color: var(--color-navy);
  border: 1.5px solid #ffffff;
}
.btn-primary:hover {
  background: transparent;
  color: #ffffff;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  color: rgba(255, 255, 255, 0.8);
  transition: border-color var(--transition), color var(--transition);
}
.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.7);
  color: #ffffff;
}
.btn-sm {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-xs);
}

/* ════════════════════════════════════════════════════
   SECTION LABELS (shared pattern)
   ════════════════════════════════════════════════════ */
.section-label {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.section-label.light { color: rgba(255, 255, 255, 0.45); }

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

/* ════════════════════════════════════════════════════
   ABOUT SECTION
   ════════════════════════════════════════════════════ */
.about-section {
  background: var(--color-surface-white);
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-8);
}
.about-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}
.about-text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-5);
  max-width: 58ch;
}
.about-text strong { color: var(--color-text); font-weight: 600; }
.about-bkc-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-navy);
  text-decoration: none;
  border-bottom: 1px solid var(--color-navy);
  padding-bottom: 1px;
  margin-top: var(--space-4);
  transition: opacity var(--transition);
}
.about-bkc-link:hover { opacity: 0.6; }
.about-pillars {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}
.pillar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
}
.pillar-icon {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(13, 45, 62, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-navy);
  flex-shrink: 0;
}
.pillar h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}
.pillar p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ════════════════════════════════════════════════════
   EPISODES CAROUSEL
   ════════════════════════════════════════════════════ */
.episodes-section {
  background: var(--color-navy);
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
}
.episodes-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}
.episodes-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}
.episodes-header-left { flex: 1; }
.episodes-heading {
  color: #ffffff !important;
  margin-bottom: var(--space-3);
}
.episodes-intro {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  font-style: italic;
  margin: 0;
}

/* Carousel controls */
.carousel-controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}
.carousel-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.25);
  background: transparent;
  color: rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  flex-shrink: 0;
}
.carousel-btn:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
  color: #ffffff;
}
.carousel-dots {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}
.carousel-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  padding: 0;
}
.carousel-dot.active {
  background: var(--color-accent);
  transform: scale(1.4);
}

/* Carousel track */
.carousel-track-wrap {
  overflow: hidden;
  border-radius: 0;
  margin: 0 calc(-1 * var(--space-8));
}
.carousel-track {
  display: flex;
  transition: transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

/* Episode slides */
.ep-slide {
  min-width: 100%;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  display: grid;
  grid-template-columns: 1fr;
  min-height: 420px;
  background: var(--color-navy-light);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 0;
  overflow: hidden;
  flex-shrink: 0;
}
.ep-slide.ep-available {
  border-color: rgba(200,169,169,0.3);
}
.ep-slide-num {
  display: none;
}
.ep-slide.ep-available .ep-slide-num {
  color: rgba(200,169,169,0.2);
  background: rgba(200,169,169,0.04);
}
.ep-slide-content {
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  justify-content: center;
  overflow: hidden;
  min-width: 0;
}
.ep-slide-label {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: rgba(255,255,255,0.4);
  margin: 0;
}
.ep-slide-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 500;
  color: #ffffff;
  line-height: 1.15;
  margin: 0;
}
.ep-slide.ep-available .ep-slide-title {
  color: #ffffff;
}
.ep-slide-theme {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-style: italic;
  margin: 0;
}
.ep-slide-desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin: 0;
  max-width: 62ch;
}
.ep-slide-quote {
  border-left: 2px solid var(--color-accent);
  padding: var(--space-3) var(--space-5);
  background: rgba(200,169,169,0.06);
  border-radius: 0 2px 2px 0;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-style: italic;
  color: rgba(255,255,255,0.7);
  line-height: 1.55;
  margin-top: var(--space-2);
}
.ep-slide-quote em {
  font-style: normal;
  font-weight: 600;
  color: var(--color-accent);
}
.ep-slide-status {
  display: inline-flex;
  align-self: flex-start;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  margin-top: var(--space-2);
}
.ep-slide-status.available {
  background: rgba(200,169,169,0.15);
  color: var(--color-accent);
  border: 1px solid rgba(200,169,169,0.3);
}
.ep-slide-status.upcoming {
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.35);
  border: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 700px) {
  .ep-slide {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .ep-slide-num {
    font-size: 4rem;
    min-height: 100px;
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .episodes-header { flex-direction: column; align-items: flex-start; gap: var(--space-6); }
}
.episodes-coming-soon { }
.coming-soon-card {
  background: var(--color-surface-white);
  border-radius: 4px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 280px 1fr;
  box-shadow: var(--shadow-md);
}
.coming-soon-visual {
  background: var(--color-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  padding: var(--space-10);
}
.waveform {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 60px;
}
.waveform span {
  display: block;
  width: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.5);
  animation: wave 1.2s ease-in-out infinite alternate;
}
.waveform span:nth-child(odd) { height: 20px; }
.waveform span:nth-child(even) { height: 40px; }
.waveform span:nth-child(3n) { height: 55px; }
.waveform span:nth-child(5) { height: 60px; background: rgba(200, 169, 169, 0.8); }
@keyframes wave {
  from { transform: scaleY(0.4); opacity: 0.4; }
  to { transform: scaleY(1); opacity: 1; }
}
.coming-soon-text {
  padding: var(--space-10) var(--space-12);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-4);
}
.coming-soon-label {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  color: var(--color-text-faint);
  font-weight: 600;
}
.coming-soon-text h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
}
.coming-soon-text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
}
.coming-soon-text .btn-primary {
  background: var(--color-navy);
  color: #ffffff;
  border-color: var(--color-navy);
  align-self: flex-start;
  margin-top: var(--space-2);
}
.coming-soon-text .btn-primary:hover {
  background: transparent;
  color: var(--color-navy);
}

/* ════════════════════════════════════════════════════
   EPISODE CARDS
   ════════════════════════════════════════════════════ */
.episodes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}
.episode-card {
  background: var(--color-surface-white);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: row;
  gap: 0;
  overflow: hidden;
  border-left: 3px solid rgba(13, 45, 62, 0.12);
  transition: box-shadow var(--transition), transform var(--transition);
}
.episode-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.ep-available {
  border-left-color: var(--color-navy);
}
.ep-upcoming {
  opacity: 0.72;
}
.ep-upcoming:hover {
  opacity: 0.9;
}
.ep-num {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 3vw, 3.5rem);
  font-weight: 400;
  color: rgba(13, 45, 62, 0.12);
  line-height: 1;
  padding: var(--space-6) var(--space-5) var(--space-6) var(--space-6);
  flex-shrink: 0;
  align-self: flex-start;
  padding-top: var(--space-8);
  letter-spacing: -0.02em;
  min-width: 4rem;
}
.ep-available .ep-num {
  color: rgba(13, 45, 62, 0.22);
}
.ep-body {
  flex: 1;
  padding: var(--space-6) var(--space-6) var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.ep-label {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--color-text-faint);
  margin: 0;
}
.ep-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-navy);
  line-height: 1.2;
  margin: 0;
}
.ep-theme {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  font-style: italic;
  margin: 0;
}
.ep-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin: 0;
}
.ep-highlights {
  margin-top: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: rgba(13, 45, 62, 0.04);
  border-left: 2px solid var(--color-accent);
  border-radius: 0 2px 2px 0;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-style: italic;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.ep-highlights em {
  font-style: normal;
  font-weight: 600;
  color: var(--color-navy);
}

/* ════════════════════════════════════════════════════
   PARTICIPANTS SECTION
   ════════════════════════════════════════════════════ */
.participants-section {
  background: var(--color-surface-white);
  padding: 0 0 clamp(var(--space-16), 8vw, var(--space-32));
}
.participants-hero {
  position: relative;
  width: 100%;
  height: clamp(620px, 70vw, 820px);
  overflow: hidden;
  margin-bottom: clamp(var(--space-12), 5vw, var(--space-20));
}
.participants-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.participants-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom,
      rgba(13, 45, 62, 0.62) 0%,
      rgba(13, 45, 62, 0.55) 55%,
      rgba(255, 255, 255, 0.95) 100%
    );
}
.participants-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-8);
}
.participants-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-bottom: var(--space-12);
  line-height: 1.7;
}
.participants-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.participant-card {
  border: 1px solid rgba(13, 45, 62, 0.1);
  border-radius: 4px;
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: box-shadow var(--transition);
}
.participant-card:hover {
  box-shadow: var(--shadow-md);
}
.participant-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-navy);
  margin: 0;
}
.participant-bio {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 0;
}
.participant-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-navy);
  text-decoration: none;
  border-bottom: 1px solid rgba(13, 45, 62, 0.2);
  padding-bottom: 1px;
  margin-top: var(--space-2);
  transition: opacity var(--transition);
}
.participant-link:hover { opacity: 0.55; }
@media (max-width: 900px) {
  .participants-layout { grid-template-columns: 1fr; }
  .participants-photo-wrap { position: static; }
  .participants-grid { grid-template-columns: 1fr; }
}

/* ════════════════════════════════════════════════════
   SUBSCRIBE SECTION
   ════════════════════════════════════════════════════ */
.subscribe-section {
  background: var(--color-navy);
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-8);
}
.subscribe-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}
.subscribe-text p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  max-width: 45ch;
  margin-top: var(--space-4);
}
.subscribe-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: var(--space-4);
}
.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
.platform-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.platform-card:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}
.platform-logo {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.8;
}
.platform-card:hover .platform-logo { opacity: 1; }
.platform-card span:last-child { margin-left: auto; }
.platform-soon {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.3);
  font-weight: 400;
  letter-spacing: 0.08em;
}
.substack-card { grid-column: span 2; }
.email-capture {
  grid-column: span 2;
  margin-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-8);
}
.email-label {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-4);
  font-weight: 600;
}
.email-form {
  display: flex;
  gap: var(--space-3);
  max-width: 520px;
}
.email-form input {
  flex: 1;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-full);
  padding: var(--space-4) var(--space-6);
  color: #ffffff;
  font-size: var(--text-sm);
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}
.email-form input::placeholder { color: rgba(255, 255, 255, 0.35); }
.email-form input:focus {
  border-color: rgba(200, 169, 169, 0.6);
  background: rgba(255, 255, 255, 0.12);
}
.btn-submit {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  background: var(--color-accent);
  color: var(--color-navy);
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-4) var(--space-8);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), opacity var(--transition);
}
.btn-submit:hover { opacity: 0.85; }
.email-note {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: rgba(200, 169, 169, 0.8);
  font-style: italic;
}

/* ════════════════════════════════════════════════════
   HOST SECTION
   ════════════════════════════════════════════════════ */
.host-section {
  background: var(--color-surface-white);
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-8);
}
/* ════════════════════════════════════════════════════
   PRODUCER SECTION
   ════════════════════════════════════════════════════ */
.producer-block {
  margin-top: clamp(var(--space-12), 5vw, var(--space-16));
  padding-top: clamp(var(--space-12), 5vw, var(--space-16));
  border-top: 1px solid rgba(13, 45, 62, 0.08);
  max-width: 760px;
}
.producer-bio {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-top: var(--space-4);
}

.host-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}
.host-card {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-16);
  align-items: start;
}
.host-name {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  margin-top: var(--space-4);
}
.host-title {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  font-weight: 500;
  margin-bottom: var(--space-8);
}
.host-bio {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  max-width: 62ch;
  margin-bottom: var(--space-5);
}
.host-links {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}
.host-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-navy);
  text-decoration: none;
  border-bottom: 1px solid rgba(13, 45, 62, 0.25);
  padding-bottom: 1px;
  transition: opacity var(--transition);
}
.host-link:hover { opacity: 0.55; }
.host-affiliation {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  text-align: center;
  padding: var(--space-10);
  border: 1px solid rgba(13, 45, 62, 0.1);
  border-radius: 4px;
}
.affiliation-mark {
  opacity: 0.7;
}
.harvard-mark {
  width: 80px;
  height: 100px;
  color: var(--color-navy);
}
.affiliation-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.affiliation-desc strong { color: var(--color-text); font-weight: 600; }

/* ════════════════════════════════════════════════════
   TOPICS SECTION
   ════════════════════════════════════════════════════ */
.topics-section {
  background: var(--color-bg);
  padding: clamp(var(--space-16), 8vw, var(--space-24)) var(--space-8);
}
.topics-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(13, 45, 62, 0.1);
  border: 1px solid rgba(13, 45, 62, 0.1);
  margin-top: var(--space-8);
  border-radius: 2px;
  overflow: hidden;
}
.topic-item {
  background: var(--color-bg);
  padding: var(--space-8) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: background var(--transition);
}
.topic-item:hover { background: var(--color-surface-white); }
.topic-num {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-faint);
  letter-spacing: 0.12em;
}
.topic-item h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.3;
}

/* ════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════ */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid rgba(13, 45, 62, 0.1);
  padding: var(--space-12) var(--space-8) var(--space-8);
}
.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: start;
  padding-bottom: var(--space-10);
  border-bottom: 1px solid rgba(13, 45, 62, 0.1);
}
.footer-name {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.footer-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
  justify-content: center;
}
.footer-nav a {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--color-text); }
.footer-nav .footer-active {
  color: var(--color-text);
  font-weight: 600;
}
.footer-collab {
  text-align: right;
}
.footer-collab p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-1);
}
.footer-collab a {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-navy);
  text-decoration: none;
  transition: opacity var(--transition);
}
.footer-collab a:hover { opacity: 0.6; }
.footer-bottom {
  max-width: var(--content-wide);
  margin: var(--space-6) auto 0;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero-content { max-width: 100%; padding: var(--space-16) var(--space-6); }
  .about-inner { grid-template-columns: 1fr; }
  .coming-soon-card { grid-template-columns: 1fr; }
  .coming-soon-visual { min-height: 140px; }
  .episodes-grid { grid-template-columns: 1fr; }
  .subscribe-inner { grid-template-columns: 1fr; }
  .email-capture { grid-column: 1; }
  .host-card { grid-template-columns: 1fr; }
  .host-affiliation { flex-direction: row; text-align: left; }
  .topics-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: var(--space-6); }
  .footer-collab { text-align: left; }
}
@media (max-width: 580px) {
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .topics-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .substack-card { grid-column: 1; }
  .email-form { flex-direction: column; }
  .host-affiliation { flex-direction: column; }
}