/* ==========================================================================
   Possible — cohort index pages (/, /c19/, /c20/). Light rebrand of the
   session-list landing pages onto the brand tokens. Fixed top gradient
   hairline, a .site-brand header (mark + "possible" + "sessions" tag), and the
   existing link-list structure. All colors come from brand.css tokens.
   ========================================================================== */

@import url("/assets/brand.css");

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--p-bg);
  color: var(--p-text);
  font-family: var(--p-font);
  font-weight: 400;
  padding: 40px 20px;
  min-height: 100vh;
}

/* Fixed gradient hairline pinned to the top of the viewport. */
body::before {
  content: '';
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  background: var(--p-grad);
  z-index: 10;
}

.container { max-width: 600px; margin: 0 auto; }

/* Brand header — mark + wordmark + "sessions" tag. */
.site-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.site-brand-mark { width: 32px; height: 32px; display: block; flex-shrink: 0; }
.site-wordmark {
  font-family: var(--p-font); font-weight: 600; font-size: 22px;
  color: var(--p-blue); line-height: 1; letter-spacing: -0.01em;
}
.site-tag { font-size: 13px; font-weight: 600; color: var(--p-text-muted); letter-spacing: 0.02em; }

.subtitle { font-size: 14px; color: var(--p-text-muted); margin-bottom: 32px; }

h2 { font-size: 16px; font-weight: 600; color: var(--p-text-strong); margin: 28px 0 12px; }

a {
  display: block;
  color: var(--p-link);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: var(--p-radius);
  transition: background 0.15s;
  margin-bottom: 4px;
  font-size: 14px;
}
a:hover { background: var(--p-surface-hover); }

/* Prominent cross-cohort nav links at the top of the root page. */
.cohort-link {
  background: var(--p-surface-raised);
  color: var(--p-link);
  font-weight: 600;
  border: 1px solid var(--p-border);
  margin-bottom: 10px;
}
.cohort-link:hover { background: var(--p-surface-hover); border-color: var(--p-border-strong); }
.cohort-links { margin-bottom: 20px; }

.date { color: var(--p-text-faint); font-size: 12px; margin-right: 8px; }
.empty { color: var(--p-text-faint); font-size: 13px; font-style: italic; padding: 10px 16px; }