:root {
  --blue: #0b2a6b;
  --blue-2: #153a8a;
  --gold: #f0c239;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --ring: #2563eb;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: Arial, Helvetica, sans-serif; color: var(--text); line-height: 1.6; }

/* Header + Nav */
header { background: linear-gradient(135deg, var(--blue), var(--blue-2)); color: #fff; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 18px; }
header .wrap { text-align: center; }
nav { background: #1f2937; }
nav .wrap { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
nav a {
  color: #fff; text-decoration: none; padding: 10px 14px; border-radius: 8px;
  transition: background .2s ease;
}
nav a:hover { background: #374151; }

/* Main */
main { background: var(--gold); }
main .wrap { padding: 22px; }
h1, h2, h3 { margin: 0 0 10px; }
p { margin: 0 0 10px; }

/* Cards, grid, buttons, inputs */
.card {
  background: var(--card); padding: 16px; border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
  border: 1px solid rgba(0,0,0,.06);
}
.grid-3 {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
img { width: 100%; height: auto; display: block; border-radius: 10px; }

label { display: block; margin: 8px 0 4px; font-weight: 600; }
input[type="number"], input[type="text"],
input[type="email"], input[type="tel"], input[type="date"],
select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #d1d5db;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 4px rgba(37,99,235,.15);
}

.btn {
  appearance: none; border: 0; cursor: pointer; border-radius: 10px;
  padding: 10px 14px; font-weight: 700;
}
.btn-primary { background: var(--blue-2); color: #fff; }
.btn-primary:hover { background: #0f2e75; }
.btn-ghost { background: #fff; border: 1px solid #d1d5db; color: var(--text); }
.btn-ghost:hover { background: #f3f4f6; }

.row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.small { color: var(--muted); font-size: .9rem; }

/* Footer */
footer { background: #fff; }
footer .wrap { text-align: center; }
footer a { color: #0b2a6b; }

/* -------------------------------
   NEW (Project 2 validation styles)
--------------------------------- */
fieldset { border: none; margin-bottom: 16px; }
legend { font-weight: bold; margin-bottom: 6px; }
.grid-2 {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* red outline on invalid fields */
input.invalid, select.invalid, textarea.invalid {
  outline: 2px solid #d12d2d;
  background: #fff5f5;
}

/* error box */
#errorBox {
  display: none;
  background: #fff3f3;
  color: #b10000;
  padding: 10px 12px;
  border-radius: 8px;
  margin-top: 8px;
}