/* ===== QUANTUM AUSTRALIA BRAND TOKENS ===== */
/* Primary green: #009945 | Dark: #1a1a1a | Light tint: #DEECDE */
:root {
  /* QA Brand Palette */
  --qa-green: #009945;
  --qa-green-dark: #007a36;
  --qa-green-light: #00b854;
  --qa-green-tint: #DEECDE;
  --qa-black: #1a1a1a;
  --qa-dark: #57585B;
  --qa-mid: #A7A8AB;
  --qa-light: #E5E6E8;
  --qa-white: #FFFFFF;

  /* Site semantic tokens — warm-light palette inspired by Perth golden light */
  --color-bg: #fdfaf6;           /* warm off-white — like sunlit paper */
  --color-bg-alt: #f9f5ef;       /* slightly deeper warm linen */
  --color-surface: #fdfaf6;
  --color-surface-2: #f5f0e8;    /* warm sand — replaces cold grey-green */
  --color-surface-3: #ede8dc;    /* deeper warm sand for card tints */
  --color-border: #e0d8cc;       /* warm taupe border */
  --color-divider: #ede8dc;
  --color-text: #1a1a18;         /* near-black with warm undertone */
  --color-text-muted: #5a5650;   /* warm charcoal — replaces cold grey */
  --color-text-faint: #a09890;   /* warm mid-grey */
  --color-primary: #009945;
  --color-primary-dark: #007a36;
  --color-primary-tint: #e8f5ee; /* very light warm-green tint */
  --color-primary-dim: rgba(0, 153, 69, 0.09);
  --shadow-sm: 0 1px 3px rgba(60,40,20,0.06);
  --shadow-md: 0 4px 16px rgba(60,40,20,0.09);
  --shadow-lg: 0 12px 40px rgba(60,40,20,0.13);
  --shadow-green: 0 4px 24px rgba(0,153,69,0.2);

  /* Type scale */
  --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-hero: clamp(3.5rem, 1rem + 7vw, 8rem);

  /* 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;

  /* Radii — QA brand uses sharp geometry, minimal rounding */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --radius-xl: 8px;
  --radius-full: 9999px;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-default: 1100px;
  --content-wide: 1280px;

  /* Fonts — Aptos is QA's system font; we use DM Sans as close web equivalent (rounded, modern) */
  --font-display: 'DM Sans', 'Aptos Display', 'Segoe UI', sans-serif;
  --font-title: 'Barlow', 'DM Sans', 'Aptos Display', sans-serif;
  --font-body: 'DM Sans', 'Aptos', 'Segoe UI', sans-serif;
}

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

html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-16);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; }
ul { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li { text-wrap: pretty; }

::selection { background: rgba(0, 153, 69, 0.15); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

a, button, [role="button"] {
  transition: color var(--transition), background var(--transition),
    border-color var(--transition), box-shadow var(--transition), opacity var(--transition);
}
button { cursor: pointer; background: none; border: none; }

/* ===== UTILITIES ===== */
.container {
  max-width: var(--content-default);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }

.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.hidden { display: none !important; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--qa-green);
  color: #fff;
  box-shadow: var(--shadow-green);
}

.btn-primary:hover {
  background: var(--qa-green-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 32px rgba(0,153,69,0.3);
}

.btn-ghost {
  border: 2px solid #fff;
  color: #fff;
  background: transparent;
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.12);
}

.btn-outline {
  border: 2px solid var(--qa-green);
  color: var(--qa-green);
  background: transparent;
}

.btn-outline:hover {
  background: var(--qa-green);
  color: #fff;
}

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

/* ===== NAV — responsive flexbox ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  /* Fully transparent at top — floats over hero image */
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

/* Solid dark background once user scrolls — keeps white logo/links legible */
.nav.scrolled {
  background: rgba(20, 22, 20, 0.94);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  border-bottom-color: rgba(255,255,255,0.08);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05), 0 4px 24px rgba(0,0,0,0.3);
}

.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  /* clamp padding: comfortable on desktop, tighter on mobile */
  padding: 0 clamp(1rem, 4vw, 2rem);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Logo — left slot, never grows, never shrinks past its natural size */
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
  min-width: 0;
}

.nav-logo-img {
  height: 32px;
  width: auto;
  max-width: 150px;
  display: block;
  /* At top: invert to white so logo shows on dark hero */
  filter: brightness(0) invert(1);
  transition: filter 0.3s, opacity 0.2s;
  object-fit: contain;
}

/* Once nav scrolls and darkens, show the real colour logo */
.nav.scrolled .nav-logo-img {
  filter: none;
}

.nav-logo:hover .nav-logo-img { opacity: 0.85; }

.nav-qa-logo {
  height: 30px !important;
  width: auto !important;
  max-width: 110px !important;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  transition: opacity 0.3s ease;
}

/* Nav links always white (nav floats on dark hero or gets dark bg on scroll) */
.nav-links a { color: rgba(255,255,255,0.9); }
.nav-links a:hover { color: #fff; }

/* Hamburger lines always white */
.nav-menu-btn span { background: rgba(255,255,255,0.9); }

.footer-qa-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  /* White transparent PNG on dark warm footer */
  filter: brightness(1);
}


/* Desktop nav links — centred flex row, gap scales with viewport */
.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-4), 2.5vw, var(--space-6));
  /* Middle slot: grows to fill space, keeps links centred */
  flex: 1;
  justify-content: flex-end;
}

.nav-links a {
  text-decoration: none;
  font-size: clamp(0.78rem, 1.1vw, var(--text-sm));
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--color-primary); }

.nav-cta {
  background: var(--qa-green) !important;
  color: #fff !important;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-sm);
  font-weight: 700 !important;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover {
  background: var(--qa-green-dark) !important;
  transform: translateY(-1px);
}

/* Hamburger button — hidden by default, shown on mobile */
.nav-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  /* Touch target ≥ 44px */
  min-width: 44px;
  min-height: 44px;
}

.nav-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transform-origin: center;
  transition: transform 0.28s ease, opacity 0.2s ease, width 0.2s ease;
}

/* Hamburger → X animation */
.nav-menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  width: 0;
}
.nav-menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== MOBILE NAV DRAWER ===== */
.mobile-nav {
  position: fixed;
  /* sits directly below the nav bar — 64px height */
  top: 64px;
  left: 0; right: 0;
  z-index: 99;
  background: rgba(18, 20, 18, 0.97);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) clamp(1rem, 4vw, 2rem) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  /* Slide-down from above the fold */
  transform: translateY(-8px);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  pointer-events: none;
  /* Hidden from screen-readers when closed */
  visibility: hidden;
}

.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
  visibility: visible;
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 1rem;
  text-decoration: none;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  transition: color var(--transition), background var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link:focus-visible {
  color: #fff;
  background: rgba(255,255,255,0.08);
}

.mobile-nav-cta {
  background: var(--qa-green) !important;
  color: #fff !important;
  font-weight: 700;
  text-align: center;
  margin-top: var(--space-3);
  border-radius: var(--radius-sm) !important;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg { position: absolute; inset: 0; z-index: 0; }

/* picture elements must fill their container just like img */
.hero-bg picture,
.venue-photo-wrap picture {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  display: block;
}

/* QA-style diagonal overlay — green wedge from bottom-left */
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    160deg,
    rgba(0, 0, 0, 0.72) 0%,
    rgba(0, 0, 0, 0.45) 45%,
    rgba(0, 153, 69, 0.18) 100%
  );
}

/* Diagonal green accent bar — QA design motif */
.hero-overlay::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 6px;
  background: var(--qa-green);
}

.hero-content {
  /* Keep the desktop sponsor anchored to the hero, not the content column. */
  position: static;
  z-index: 1;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-20), 10vh, var(--space-32)) var(--space-6) var(--space-16);
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  background: var(--qa-green);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-8);
}

.hero-title {
  font-family: var(--font-title);
  font-weight: 900;
  line-height: 0.97;
  color: #fff;
  margin-bottom: var(--space-6);
  letter-spacing: -0.01em;
  display: flex;
  flex-direction: column;
}

/* "Quantum" — white */
.hero-title-line1 {
  display: block;
  color: #ffffff;
  font-size: clamp(3rem, 8.5vw, 6.5rem);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -0.01em;
}

/* "Meets" — QA green */
.hero-title-line2 {
  display: block;
  color: var(--qa-green);
  font-size: clamp(3rem, 8.5vw, 6.5rem);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -0.01em;
}

/* "MedTech" — white */
.hero-title-line3 {
  display: block;
  color: #ffffff;
  font-size: clamp(3rem, 8.5vw, 6.5rem);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -0.01em;
}

.hero-title-accent { color: var(--qa-green); }

.hero-date {
  font-size: var(--text-xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-2);
}

.hero-venue {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  margin-bottom: var(--space-10);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-16);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.hero-stat { display: flex; flex-direction: column; }

.hero-stat-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--qa-green);
  line-height: 1;
}

.hero-stat-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}

.hero-stat-divider {
  width: 1px; height: 36px;
  background: rgba(255,255,255,0.2);
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-10); right: var(--space-8);
  z-index: 1;
  display: flex; align-items: center; gap: var(--space-3);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-scroll-line { width: 40px; height: 1px; background: rgba(255,255,255,0.3); }

/* ===== ABOUT ===== */
.about { background: var(--color-bg); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about-intro { grid-column: 1 / -1; max-width: 88ch; }
.about-intro .about-body { max-width: none; }
.about-intro .about-body:last-child { margin-bottom: 0; }
.about-subheading {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-5);
}
.about-day-heading {
  color: var(--color-primary-dark);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.about-card .about-speaker { font-size: var(--text-lg); color: var(--color-text); font-weight: 700; }
.about-card .about-laureate { margin-bottom: var(--space-4); }
.about-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: var(--space-4) 0;
  padding: 0;
}
.about-topics li {
  padding: var(--space-1) var(--space-3);
  color: var(--color-primary-dark);
  background: var(--color-primary-tint);
  border: 1px solid var(--color-border);
  font-size: var(--text-xs);
  font-weight: 600;
}
.about-lead-statement { color: var(--color-text); font-weight: 700; }
.about-glance {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background: var(--color-surface-2);
  border-left: 3px solid var(--qa-green);
}
.about-glance dl { margin: 0; }
.about-glance dl > div + div { margin-top: var(--space-5); }
.about-glance dt { font-size: var(--text-sm); color: var(--color-text); font-weight: 700; margin-bottom: var(--space-1); }
.about-glance dd { margin: 0; color: var(--color-text-muted); font-size: var(--text-sm); }

.about-body {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  font-size: var(--text-base);
  max-width: 52ch;
}

.about-highlights {
  display: flex; flex-direction: column;
  gap: var(--space-5); margin-top: var(--space-8);
}

.highlight-item { display: flex; gap: var(--space-4); align-items: flex-start; }

.highlight-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--color-primary-tint);
  border-left: 3px solid var(--qa-green);
  display: flex; align-items: center; justify-content: center;
}

.highlight-item strong {
  display: block; font-weight: 700;
  color: var(--color-text);
  margin-bottom: 2px; font-size: var(--text-sm);
}

.highlight-item p { font-size: var(--text-sm); color: var(--color-text-muted); }

/* QA-style card — sharp, with green left border accent */
.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--qa-green);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.about-card-top, .about-card-bottom { padding: var(--space-8); }

.about-card-top {
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}

.about-card-label {
  font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--color-primary); margin-bottom: var(--space-2);
}

.about-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg); font-weight: 700;
  margin-bottom: var(--space-2);
}

.about-card p { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-1); }

.about-card-venue { color: var(--color-text-faint) !important; font-size: var(--text-xs) !important; margin-top: var(--space-2) !important; }

/* ===== BANNER ===== */
.banner-section {
  position: relative;
  height: clamp(200px, 35vw, 480px);
  overflow: hidden;
}

.banner-img { width: 100%; height: 100%; object-fit: cover; object-position: center; }

/* Warm Perth-sunset banner overlay */
.banner-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(100deg,
    rgba(20,60,10,0.80) 0%,
    rgba(0,120,55,0.60) 38%,
    rgba(180,100,20,0.35) 75%,
    rgba(200,120,10,0.20) 100%);
  display: flex; align-items: center; padding: 0 var(--space-10);
}

.banner-quote {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.8rem);
  font-weight: 700; color: #fff;
  max-width: 620px; line-height: 1.35;
}

/* ===== SPEAKERS ===== */
.speakers {
  background: linear-gradient(180deg, #f5f0e8 0%, #f9f5ef 100%);
}

/* (speakers-grid + speaker-card defined later, near end of file) */


.speaker-badge {
  position: absolute; top: var(--space-4); right: var(--space-4);
  font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: #fff; background: var(--qa-green);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
}

.speaker-avatar {
  width: 60px; height: 60px; flex-shrink: 0;
  margin-bottom: var(--space-4);
  background: var(--color-primary-tint);
  border: 2px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
}

.speaker-avatar-lg { width: 80px; height: 80px; margin-bottom: 0; }

/* Coloured avatar accents */
.speaker-featured .speaker-avatar-lg { background: rgba(0,153,69,0.12); border-color: var(--qa-green); }

.speaker-role { font-size: var(--text-sm); font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-1); }
.speaker-affil { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-3); }
.speaker-talk { font-size: var(--text-sm); color: var(--color-text); font-style: italic; line-height: 1.5; margin-bottom: var(--space-3); }

.speaker-session {
  display: inline-block; font-size: var(--text-xs); font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-tint);
  border: 1px solid rgba(0,153,69,0.2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
}

.speakers-more { text-align: center; margin-top: var(--space-10); font-size: var(--text-sm); color: var(--color-text-muted); }
.speakers-more a { color: var(--color-primary); text-decoration: none; font-weight: 700; }
.speakers-more a:hover { text-decoration: underline; }

/* ===== PROGRAM ===== */
.program { background: var(--color-bg); }

.program-tabs {
  display: inline-flex;
  gap: 0;
  margin-bottom: var(--space-8);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.program-tab {
  font-size: var(--text-sm); font-weight: 700;
  color: var(--color-text-muted);
  padding: var(--space-3) var(--space-6);
  border-radius: 0;
  border-right: 1px solid var(--color-border);
  transition: var(--transition);
}

.program-tab:last-child { border-right: none; }
.program-tab:hover { color: var(--color-primary); background: var(--color-primary-tint); }

.program-tab.active {
  background: var(--qa-green);
  color: #fff;
}

.program-header-info {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-sm); color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border-left: 3px solid var(--qa-green);
  width: fit-content;
}

.program-timeline {
  display: flex; flex-direction: column; gap: 0;
  border-left: 3px solid var(--qa-green);
  margin-left: var(--space-6);
  padding-left: var(--space-8);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-8);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) - 6px);
  top: 6px;
  width: 12px; height: 12px;
  background: var(--color-border);
  border: 2px solid var(--color-bg);
}

.timeline-featured::before {
  background: var(--qa-green);
  box-shadow: 0 0 0 3px rgba(0,153,69,0.2);
}

.timeline-time {
  font-size: var(--text-xs); color: var(--color-text-muted);
  font-weight: 700; padding-top: 4px; flex-shrink: 0;
  letter-spacing: 0.03em;
}

.timeline-badge {
  display: inline-block; font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: #fff; background: var(--qa-green);
  padding: 2px var(--space-3); margin-bottom: var(--space-2);
  border-radius: var(--radius-sm);
}

.timeline-body h4 { font-weight: 700; font-size: var(--text-base); margin-bottom: var(--space-1); }
.timeline-body p { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: 2px; }
.timeline-note { color: var(--color-text-faint) !important; font-size: var(--text-xs) !important; margin-top: var(--space-1) !important; }

/* Time-range label under item titles */
.timeline-time-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.03em;
}

/* Speaker status badges (program) */
.program-status-key {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  margin: 0 0 var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.status-badge {
  display: inline-block;
  vertical-align: 1px;
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.status-confirmed { color: #0b7a3d; background: rgba(0, 153, 69, 0.12); }
.status-invited  { color: #8a6a00; background: rgba(230, 179, 0, 0.16); }
.status-tbc      { color: #5c6166; background: rgba(28, 30, 32, 0.08); }

/* ===== HERO SPONSOR CALLOUT ===== */
.hero-sponsor.sponsor-profile {
  position: absolute;
  top: 96px;
  right: clamp(var(--space-4), 4vw, var(--space-10));
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-2);
}
.hero-sponsor.sponsor-profile .partner-sponsor-label {
  color: rgba(255, 255, 255, 0.65);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 var(--space-2) auto;
  text-align: right;
}
.hero-sponsor-logo { filter: none; }
.hero-sponsor .sponsor-info-trigger {
  margin: var(--space-2) 0 0 auto;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  backdrop-filter: blur(6px);
}
.hero-sponsor .sponsor-info-panel {
  top: calc(100% + var(--space-3));
  right: 0;
}

/* Partners bar support note */
.partners-support-note {
  margin: var(--space-6) 0 0;
  text-align: center;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.02em;
}

/* ===== VENUE ===== */
.venue {
  background: linear-gradient(180deg, #f9f5ef 0%, #f5f0e8 100%);
  padding-bottom: var(--space-16);
}

/* Full-bleed photo wrapper — sits directly in <section>, outside .container */
.venue-photo-wrap {
  position: relative;
  width: 100%;
  height: 500px;
  margin: var(--space-8) 0;
  overflow: hidden;
}

.venue-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
  display: block;
  filter: brightness(0.92) saturate(1.05);
}

/* Gradient overlay at bottom for text legibility */
.venue-photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,20,10,0.72) 0%, rgba(10,20,10,0.18) 45%, transparent 70%);
  display: flex;
  align-items: flex-end;
}

.venue-overlay-inner {
  padding: var(--space-8) var(--space-10);
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.venue-overlay-location {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.92);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
}

.venue-overlay-link {
  color: #ffffff;
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.4);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}

.venue-overlay-link:hover { border-color: #fff; }

/* Caption row below the photo */
.venue-caption-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-12);
  padding-top: var(--space-8);
  flex-wrap: wrap;
}

.venue-caption-text {
  flex: 1 1 300px;
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.75;
  margin: 0;
  max-width: 56ch;
}

.venue-caption-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-shrink: 0;
}

.venue-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

a.venue-pill-link {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 600;
  border-color: var(--qa-green);
  transition: background 0.2s;
}

a.venue-pill-link:hover { background: var(--color-primary-tint); }

@media (max-width: 640px) {
  .venue-photo-wrap { height: 260px; }
  .venue-overlay-inner { padding: var(--space-5) var(--space-5); gap: var(--space-4); }
  .venue-caption-row { flex-direction: column; gap: var(--space-6); }
  .venue-caption-details { flex-direction: row; flex-wrap: wrap; }
}

/* ===== SPONSORS ===== */
.sponsors { background: var(--color-bg); }

.sponsor-simple {
  display: flex; flex-direction: column;
  gap: var(--space-8); max-width: 680px;
}

.sponsor-simple-text p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
  max-width: 64ch;
}

.sponsor-simple-text strong { color: var(--color-primary); font-weight: 700; }

.sponsor-cta {
  align-self: flex-start;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ===== REGISTER ===== */
.register { padding: 0; }

.register-bg {
  background: linear-gradient(160deg, #006b2f 0%, #009945 55%, #00b350 100%);
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
  position: relative;
  overflow: hidden;
}

/* Subtle diagonal texture */
.register-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 20px,
    rgba(255,255,255,0.03) 20px,
    rgba(255,255,255,0.03) 21px
  );
  pointer-events: none;
}

/* Header */
.register-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.register-eyebrow {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--space-3);
}

.register-heading {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-4);
  /* High contrast attention-grabber */
  text-shadow: 0 2px 24px rgba(0,0,0,0.18);
}

.register-tagline {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.82);
  max-width: 48ch;
  margin: 0 auto var(--space-6);
  line-height: 1.6;
}

.register-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.register-pill {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Iframe card */
.eventbrite-embed-wrap {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  background: #ffffff;
  box-shadow: 0 8px 48px rgba(0,0,0,0.22);
}

.eventbrite-embed-wrap iframe {
  width: 100%;
  min-height: 620px;
  border: none;
  display: block;
}

.register-powered {
  text-align: center;
  margin-top: var(--space-5);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
}

.register-powered a {
  color: rgba(255,255,255,0.6);
  text-decoration: underline;
}

@media (max-width: 640px) {
  .register-pills { flex-direction: column; align-items: center; }
  .eventbrite-embed-wrap iframe { min-height: 700px; }
}

/* ===== FOOTER ===== */
.footer {
  background: #1a1c18; /* warm forest-dark — slightly warmer than pure black */
  padding-block: var(--space-12);
}

.footer-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-10); margin-bottom: var(--space-10);
  align-items: start;
}

.footer-brand { display: flex; align-items: center; gap: var(--space-4); }

.footer-event-name {
  font-family: var(--font-display);
  font-weight: 700; font-size: var(--text-base);
  color: #fff; margin: 0;
}

.footer-sub { font-size: var(--text-xs); color: rgba(255,255,255,0.45); margin: 0; }

.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-6); }

.footer-links a { text-decoration: none; font-size: var(--text-sm); color: rgba(255,255,255,0.55); font-weight: 500; }
.footer-links a:hover { color: var(--qa-green); }

.footer-org-label { font-size: var(--text-xs); letter-spacing: 0.08em; text-transform: uppercase; color: rgba(255,255,255,0.35); margin-bottom: var(--space-1) !important; }
.footer-org-name { font-family: var(--font-display); font-size: var(--text-base); font-weight: 700; color: var(--qa-green); margin-bottom: 2px !important; }
.footer-org-node { font-size: var(--text-sm); color: rgba(255,255,255,0.55); margin-bottom: var(--space-2) !important; }
.footer-org-partners { font-size: var(--text-xs); color: rgba(255,255,255,0.3); margin: 0 !important; }

.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: var(--space-2);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: var(--text-xs); color: rgba(255,255,255,0.3);
}

/* ===== RESPONSIVE ===== */

/* --- Tablet (769px – 900px): collapse some grids but keep full nav --- */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .speakers-grid { grid-template-columns: 1fr 1fr; }
  .speaker-featured { grid-column: span 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* --- Tablet nav: tighten gaps but keep links visible (768px) --- */
@media (max-width: 768px) {
  .nav-inner { height: 60px; }
  .mobile-nav { top: 60px; }

  /* Slightly shrink link text to prevent wrapping */
  .nav-links a {
    font-size: 0.78rem;
  }
  .nav-links {
    gap: var(--space-3);
  }
  .nav-cta {
    padding: 0.38rem 0.85rem;
    font-size: 0.78rem !important;
  }
}

/* --- Small tablet / large phone: hide nav links, show hamburger (640px) --- */
@media (max-width: 640px) {
  .nav-inner { height: 58px; }
  .mobile-nav { top: 58px; }

  /* Hide desktop links, reveal hamburger */
  .nav-links { display: none; }
  .nav-menu-btn { display: flex; }

  /* Logo on phones — already small asset, just enforce */
  .nav-qa-logo { height: 26px !important; max-width: 100px !important; }
}

/* --- Mobile (max 480px): full single-column layout --- */
@media (max-width: 480px) {
  .hero-stat-divider { display: none; }
  /* Stack stats into 2-column grid to prevent orphan on mobile */
  .hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4) var(--space-6); }
  /* Keep badge on one line */
  .hero-badge { white-space: nowrap; font-size: 0.65rem; }
  .speakers-grid { grid-template-columns: 1fr; }
  .speaker-featured { grid-column: span 1; grid-template-columns: 1fr; }
  .speaker-avatar-lg { margin-bottom: var(--space-4); }
  .timeline-item { grid-template-columns: 1fr; gap: var(--space-1); }
  .timeline-time { padding-top: 0; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .banner-overlay { padding: 0 var(--space-6); }
  .register-bg { clip-path: polygon(0 2%, 100% 0, 100% 98%, 0 100%); }
}

/* --- Hero image: ensure cover is bulletproof on all engines --- */
/* Force repaint on every load — prevents stale cached renders */
.hero-bg,
.hero-img {
  transform: translateZ(0);
  will-change: transform;
  backface-visibility: hidden;
}

/* Tablet-specific hero: shift object-position up slightly so skyline 
   stays prominent on taller portrait viewports */
@media (max-width: 900px) and (orientation: portrait) {
  .hero-img { object-position: 55% 28%; }
}

/* Mobile: tighten hero layout */
@media (max-width: 640px) {
  .hero { min-height: 100svh; }
  .hero-img { object-position: 60% 38%; }
  .hero-title { line-height: 0.92; letter-spacing: -0.02em; }
  .hero-actions { gap: var(--space-3); }
}


/* Humanitix popup button */
button[data-humanitix-popup] {
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.register-note {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.5);
  margin: 0;
}

.btn-lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
}


/* Humanitix inline iframe */
/* ===== PARTNERS SECTION ===== */
.partners-section {
  background: #111;
  padding: var(--space-10) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.partners-label {
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-8);
}

.partners-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-10) var(--space-12);
}

.partner-link {
  display: flex;
  align-items: center;
  opacity: 0.7;
  transition: opacity 0.25s;
}
.partner-link:hover { opacity: 1; }

/* Base: make all logos white to look consistent on dark bg */
.partner-logo {
  display: block;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

/* QA logo — slightly larger as main presenter */
.partner-logo--qa {
  height: 38px;
  max-width: 160px;
}

/* UWA crest SVG */
.partner-logo--uwa {
  width: 190px;
  height: auto;
  max-width: 190px;
  filter: grayscale(1);
}
.partner-link:has(.partner-logo--uwa) { opacity: 1; }

/* QUISA wordmark — dark logo, invert to white */
.partner-logo--quisa {
  height: 30px;
  max-width: 130px;
}

/* QDM — already teal/coloured, invert to white for consistency */
.partner-logo--qdm {
  height: 50px;
  max-width: 140px;
}

@media (max-width: 640px) {
  .partners-logos {
    gap: var(--space-8) var(--space-8);
  }
  .partner-logo--qa { height: 28px; }
  .partner-logo--uwa { width: 170px; height: auto; max-width: 170px; }
  .partner-logo--quisa { height: 22px; }
  .partner-logo--qdm { height: 38px; }
}

/* ===== SPEAKERS ===== */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.speaker-card {
  background: var(--color-bg, #fdfaf6);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s, box-shadow 0.25s;
  display: flex;
  flex-direction: column;
}

.speaker-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.speaker-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  background: #e0e0e0;
  display: block;
}

.speaker-photo--fallback {
  background: linear-gradient(135deg, var(--qa-green, #009945) 0%, var(--color-primary-dark, #007a36) 100%);
  color: white;
  font-weight: 700;
  font-size: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.speaker-info {
  padding: var(--space-4);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.speaker-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--color-text, #222);
}

.speaker-affiliation {
  font-size: 0.875rem;
  color: #666;
  line-height: 1.4;
  margin-bottom: var(--space-3);
  flex: 1;
}

.speaker-link {
  font-size: 0.8rem;
  color: var(--qa-green, #009945);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.speaker-link:hover {
  text-decoration: underline;
}

/* Fallback avatar polish */
.speaker-photo--fallback {
  background: linear-gradient(135deg, #00b352 0%, #007a36 100%);
  color: white;
  font-weight: 800;
  font-size: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  font-family: var(--font-title, 'Nunito', sans-serif);
  letter-spacing: 0.05em;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* speaker link wrapper */
.speaker-link-wrap {
  margin-top: auto;
  padding-top: var(--space-2);
}
.speaker-link--none {
  color: #888;
  font-weight: 500;
}

.speaker-note {
  margin: var(--space-3) 0 0;
  color: var(--color-primary-dark);
  font-size: var(--text-sm);
  font-weight: 700;
}

.partner-link--sponsor {
  flex-direction: column;
  gap: var(--space-3);
  padding-left: var(--space-8);
  border-left: 1px solid rgba(255,255,255,0.2);
  opacity: 1;
}

.partner-sponsor-label {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.partner-logo--quantinuum {
  width: 150px;
  height: auto;
  filter: none;
}

.sponsor-profile { position: relative; z-index: 5; }
.sponsor-info-trigger {
  color: #fff;
  font: inherit;
  font-size: var(--text-xs);
  background: transparent;
  border: 1px solid rgba(255,255,255,0.35);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
}
.sponsor-info-trigger:hover,
.sponsor-info-trigger:focus-visible { border-color: #fff; outline: 2px solid var(--qa-green); outline-offset: 3px; }
.sponsor-info-panel {
  position: absolute;
  right: 0;
  top: calc(100% + var(--space-3));
  width: min(390px, calc(100vw - var(--space-12)));
  padding: var(--space-6);
  background: var(--color-bg, #fdfaf6);
  color: #292b28;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--qa-green);
  box-shadow: 0 12px 40px rgba(0,0,0,0.28);
  text-align: left;
  line-height: 1.55;
}
.sponsor-info-panel[hidden] { display: none; }
.sponsor-info-panel::before {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 0;
  right: 0;
  height: var(--space-4);
}
.sponsor-info-panel h3 { font-size: var(--text-lg); margin: 0 var(--space-6) var(--space-3) 0; }
.sponsor-info-panel p { font-size: var(--text-sm); margin-bottom: var(--space-3); }
.sponsor-info-panel .sponsor-info-eyebrow { color: var(--color-primary-dark); font-weight: 700; font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; }
.sponsor-info-close { position: absolute; top: var(--space-3); right: var(--space-3); width: 36px; height: 36px; font-size: 1.5rem; color: #292b28; cursor: pointer; background: transparent; border: 0; }
.sponsor-info-website { color: var(--color-primary-dark); font-size: var(--text-sm); font-weight: 700; }

@media (max-width: 640px) {
  .partner-link--sponsor {
    flex-basis: 100%;
    border-left: 0;
    padding-left: 0;
    padding-top: var(--space-6);
    border-top: 1px solid rgba(255,255,255,0.2);
  }
  .sponsor-info-panel { left: 0; right: auto; width: 100%; }
}

/* ===== HERO SPONSOR — responsive ===== */
@media (max-width: 768px) {
  .hero-content { position: relative; }
  .hero-sponsor.sponsor-profile {
    position: relative;
    top: auto;
    right: auto;
    width: 100%;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    margin: 0 0 var(--space-8);
    padding: var(--space-6) var(--space-4);
    background: rgba(0, 0, 0, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.22);
    text-align: center;
  }
  .hero-sponsor.sponsor-profile .partner-sponsor-label {
    margin: 0;
    color: #fff;
    font-size: var(--text-xs);
    text-align: center;
  }
  .hero-sponsor .partner-logo--quantinuum.hero-sponsor-logo {
    width: 180px;
    max-width: 100%;
    height: auto;
  }
  .hero-sponsor .sponsor-info-trigger {
    min-height: 44px;
    margin: 0;
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-4);
  }
  .hero-sponsor .sponsor-info-panel {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    transform: none;
    width: 100%;
    padding: var(--space-5);
  }
  .hero-sponsor .sponsor-info-close {
    top: var(--space-2);
    right: var(--space-2);
    width: 44px;
    height: 44px;
  }
  .hero-scroll { display: none; }
}

@media (max-width: 640px) {
  .timeline-item {
    grid-template-columns: 74px 1fr;
    gap: var(--space-4);
  }
}