/* Krill Ecosystem Platform -- portal front end (bluewings.ovh/krill-project/).
   Self-contained, no external assets. Navy/ice palette matching the Shiny app
   (primary #1B3A5B, secondary #4C78A8). */

:root {
  --navy: #1B3A5B;
  --navy-2: #24507c;
  --blue: #4C78A8;
  --ice: #eaf1f8;
  --ink: #16202b;
  --muted: #5b6b7b;
  --line: #d7e0ea;
  --card: #ffffff;
  --bg: #f4f7fb;
  --accent: #2f9e8f;
  --danger: #b4361e;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(27, 58, 91, .10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--navy-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

/* ---- top bar ---- */
.topbar {
  background: linear-gradient(120deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff;
}
.topbar .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700;
  font-size: 1.05rem; color: #fff; }
.brand .mark {
  width: 34px; height: 34px; border-radius: 9px; display: grid;
  place-items: center; background: rgba(255,255,255,.14); font-size: 1.15rem;
}
.brand:hover { text-decoration: none; }
.navlinks a { color: #cfe0f2; margin-left: 20px; font-size: .95rem; }
.navlinks a:hover { color: #fff; }

/* ---- hero ---- */
.hero {
  background:
    radial-gradient(1200px 400px at 80% -10%, rgba(76,120,168,.35), transparent),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 70%);
  color: #fff; padding: 56px 0 64px;
}
.hero h1 { font-size: 2.3rem; margin: 0 0 12px; line-height: 1.2; }
.hero p.lead { font-size: 1.12rem; color: #d9e6f4; max-width: 720px; margin: 0; }
.pill {
  display: inline-block; background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.22); color: #eaf3ff;
  padding: 4px 12px; border-radius: 999px; font-size: .8rem; font-weight: 600;
  letter-spacing: .02em; margin-bottom: 18px;
}
.caveat {
  margin-top: 22px; font-size: .9rem; color: #f4d9c9;
  border-left: 3px solid var(--danger); padding-left: 12px;
}

/* ---- sections ---- */
main { padding: 44px 0 64px; }
.section-title { font-size: 1.35rem; color: var(--navy); margin: 0 0 6px; }
.section-sub { color: var(--muted); margin: 0 0 26px; }

/* ---- module cards grid ---- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 22px; display: flex; flex-direction: column;
  transition: transform .12s ease, box-shadow .12s ease;
}
.card:hover { transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(27,58,91,.16); }
.card .num {
  width: 40px; height: 40px; border-radius: 11px; display: grid;
  place-items: center; font-weight: 700; color: #fff; font-size: 1.05rem;
  background: var(--blue); margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; color: var(--navy); font-size: 1.12rem; }
.card p { margin: 0 0 16px; color: var(--muted); font-size: .95rem; flex: 1; }
.card .go { color: var(--navy-2); font-weight: 600; font-size: .92rem; }

/* ---- buttons ---- */
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 10px;
  font-weight: 600; font-size: .96rem; border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-2); text-decoration: none; }
.btn-outline {
  background: #fff; color: var(--navy); border-color: var(--navy);
}
.btn-outline:hover { background: var(--ice); text-decoration: none; }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; }

/* ---- module detail page ---- */
.crumbs { color: var(--muted); font-size: .9rem; margin-bottom: 10px; }
.detail {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 30px; margin-bottom: 24px;
}
.detail h2 { color: var(--navy); margin: 0 0 4px; font-size: 1.6rem; }
.detail .tag { color: var(--blue); font-weight: 600; font-size: .9rem;
  text-transform: uppercase; letter-spacing: .04em; }
.detail ul { padding-left: 20px; color: var(--ink); }
.detail ul li { margin: 6px 0; }

.access {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 8px;
}
@media (max-width: 700px) { .access { grid-template-columns: 1fr; } }
.access .opt {
  border: 1px solid var(--line); border-radius: 12px; padding: 20px;
  background: var(--ice);
}
.access .opt h4 { margin: 0 0 6px; color: var(--navy); }
.access .opt p { color: var(--muted); font-size: .9rem; margin: 0 0 14px; }
.access .opt.single { grid-column: 1 / -1; }

/* ---- footer ---- */
footer {
  border-top: 1px solid var(--line); background: #fff; color: var(--muted);
  font-size: .86rem; padding: 22px 0; margin-top: 30px;
}
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap;
  gap: 8px; }