/* Aligné sur content/kubernetes-hell-to-heaven/css/custom.css (specificat.io) */
:root {
  --bg-dark: #050709;
  --bg-medium: #0d1115;
  --bg-light: #1b1f22;
  --bg-gradient-start: #10151a;
  --text-primary: #f5f5f5;
  --text-muted: rgba(245, 245, 245, 0.9);
  --text-subtle: rgba(245, 245, 245, 0.75);
  --accent-cyan: #2bc9c6;
  --accent-cyan-light: #e9fefd;
  --accent-cyan-bg: rgba(43, 201, 198, 0.08);
  --accent-cyan-border: rgba(43, 201, 198, 0.55);
  --accent-copper: #d19c5a;
  --border-subtle: rgba(255, 255, 255, 0.12);
  --border-very-subtle: rgba(255, 255, 255, 0.07);
  --panel-glow: 0 0 0 1px rgba(43, 201, 198, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-dark);
  background-image: radial-gradient(
      circle at 10% 0%,
      var(--bg-gradient-start) 0%,
      var(--bg-dark) 52%,
      var(--bg-light) 100%
    ),
    radial-gradient(
      ellipse 100% 80% at 50% -20%,
      rgba(43, 201, 198, 0.12),
      transparent 55%
    );
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse 95% 75% at 50% 50%,
    transparent 35%,
    rgba(5, 7, 9, 0.35) 100%
  );
  z-index: 0;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.75rem) clamp(1.25rem, 4vw, 2rem) 3rem;
}

.masthead {
  margin-bottom: 2rem;
}

.masthead h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.masthead p {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text-subtle);
  max-width: 42em;
}

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

@media (min-width: 560px) {
  .talks-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

.talk-card {
  display: flex;
  flex-direction: column;
  padding: 1.15rem 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  background: rgba(13, 17, 21, 0.55);
  box-shadow: var(--panel-glow), inset 0 1px 0 0 rgba(255, 255, 255, 0.03);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.12s ease;
}

.talk-card:hover,
.talk-card:focus-visible {
  border-color: var(--accent-cyan-border);
  box-shadow: var(--panel-glow), 0 0 0 1px rgba(43, 201, 198, 0.18),
    inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
  transform: translateY(-1px);
  outline: none;
}

.talk-card:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.talk-card h2 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.talk-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.talk-card .meta {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-subtle);
}

.site-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-very-subtle);
  font-size: 0.8rem;
  color: var(--text-subtle);
}

.site-footer a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 500;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 2px;
}