/* css/style.css — Conference FV design tokens & base styles */
:root {
  --color-primary: #1E3A8A;
  --color-secondary: #1E40AF;
  --color-accent: #B45309;
  --color-bg: #F8FAFC;
  --color-fg: #0F172A;
  --color-muted: #E9EEF5;
  --color-muted-fg: #64748B;
  --color-border: #CBD5E1;
  --color-destructive: #DC2626;
  --color-on-primary: #FFFFFF;

  --font-heading: "Crimson Pro", Georgia, serif;
  --font-body: "Atkinson Hyperlegible", Arial, sans-serif;

  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 80px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --container-max: 1200px;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-fg);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 var(--space-4);
  color: var(--color-fg);
}
h1 { font-size: clamp(2.25rem, 4vw, 3.5rem); line-height: 1.05; }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: 1.375rem; }
p { margin: 0 0 var(--space-4); }
a { color: var(--color-primary); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.band { padding: var(--space-8) 0; }
.band--navy { background: var(--color-primary); color: var(--color-on-primary); }
.band--navy h1, .band--navy h2, .band--navy h3 { color: var(--color-on-primary); }
.band--navy a:not(.btn) { color: #DCE6FA; }
.band--muted { background: var(--color-muted); }
.band--white { background: #FFFFFF; }

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}
.btn--primary { background: var(--color-accent); color: #FFFFFF; }
.btn--primary:hover { background: #92400A; }
.btn--ghost { background: transparent; border-color: currentColor; color: inherit; }
.btn--ghost:hover { background: rgba(255,255,255,0.12); }
.band--white .btn--ghost:hover, .band--muted .btn--ghost:hover { background: rgba(15,23,42,0.06); }

.card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.grid {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 640px) { .grid--2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 768px) { .grid--3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .grid--4 { grid-template-columns: repeat(4, 1fr); } }

table { width: 100%; border-collapse: collapse; background: #FFFFFF; }
th, td { text-align: left; padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-border); }
th { font-family: var(--font-heading); font-weight: 600; background: var(--color-muted); }

.avatar {
  width: 96px; height: 96px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-primary); color: #FFFFFF;
  font-family: var(--font-heading); font-weight: 600; font-size: 1.75rem;
  margin-bottom: var(--space-3);
}