:root {
  --DA-Navy-1: #081f55;
  --DA-Navy-2: #0a2b6b;
  --DA-LinkBlue: #3297c9;
  --DA-LinkBlue-3L: #ebf3f9;
  --DA-StatusBlue: #2563eb;
  --DA-Green: #16a34a;
  --DA-Grey-100: #f3f4f6;
  --DA-Grey-200: #e5e7eb;
  --DA-Grey-500: #6b7280;
  --DA-Text: #222222;
  --DA-SepLine: #d0dcea;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Montserrat, "Segoe UI", Tahoma, sans-serif;
  color: var(--DA-Text);
  background: var(--DA-Grey-100);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Header ---- */
header {
  background: linear-gradient(135deg, var(--DA-Navy-1), var(--DA-Navy-2));
  color: #fff;
  padding: 0.9rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 10px rgba(8, 31, 85, 0.25);
}
.brand {
  display: flex;
  align-items: center;
}
.brand .da-logo {
  height: 34px;
  width: auto;
  display: block;
}
.env-pill {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ---- Hero ---- */
.hero {
  background: linear-gradient(180deg, #f8fbff, var(--DA-Grey-100));
  border-bottom: 1px solid var(--DA-SepLine);
  padding: 3rem 2rem 2.5rem;
  text-align: center;
}
.hero h1 {
  font-family: Exo, Montserrat, sans-serif;
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0 0 0.6rem;
  color: var(--DA-Navy-1);
}
.hero p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--DA-Grey-500);
  font-size: 1.02rem;
}
.accent-bar {
  width: 72px; height: 4px; margin: 0 auto 1.6rem;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--DA-LinkBlue), var(--DA-Green));
}

/* ---- Cards ---- */
main {
  max-width: 1080px;
  margin: -1.25rem auto 0;
  padding: 0 1.5rem 3rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
a.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border: 1px solid var(--DA-Grey-200);
  border-radius: 12px;
  padding: 1.4rem;
  box-shadow: 0 4px 14px rgba(8, 31, 85, 0.06);
  transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
}
a.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(8, 31, 85, 0.14);
  border-color: var(--DA-LinkBlue-3L);
}
.card .icon {
  width: 46px; height: 46px;
  border-radius: 10px;
  display: grid; place-items: center;
  margin-bottom: 0.9rem;
  font-size: 1.35rem;
  background: var(--DA-LinkBlue-3L);
}
.card h3 {
  font-family: Exo, Montserrat, sans-serif;
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  color: var(--DA-Navy-1);
}
.card p {
  margin: 0;
  color: var(--DA-Grey-500);
  font-size: 0.88rem;
}
.card .arrow {
  margin-top: 0.9rem;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--DA-StatusBlue);
}

/* ---- Footer ---- */
footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--DA-Grey-500);
  font-size: 0.8rem;
  border-top: 1px solid var(--DA-SepLine);
  background: #fff;
}

/* ---- Prototype placeholder page ---- */
.placeholder {
  max-width: 640px;
  margin: 4rem auto;
  padding: 0 1.5rem;
  text-align: center;
}
.placeholder .icon {
  width: 64px; height: 64px;
  border-radius: 14px;
  display: grid; place-items: center;
  margin: 0 auto 1.25rem;
  font-size: 1.9rem;
  background: var(--DA-LinkBlue-3L);
}
.placeholder h1 {
  font-family: Exo, Montserrat, sans-serif;
  color: var(--DA-Navy-1);
  margin: 0 0 0.5rem;
}
.placeholder p {
  color: var(--DA-Grey-500);
}
.placeholder a.back {
  display: inline-block;
  margin-top: 1.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--DA-StatusBlue);
  text-decoration: none;
}
.placeholder a.back:hover { text-decoration: underline; }