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

:root {
  --brand:   #1a3a5c;
  --accent:  #e8911a;
  --bg:      #f4f6f8;
  --surface: #ffffff;
  --text:    #1e2b3a;
  --muted:   #6b7a8d;
  --border:  #d0d9e4;
  --danger:  #c0392b;
  --radius:  6px;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 16px;
  color: var(--text);
  background: var(--bg);
}

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

/* ── Nav bar ── */
.navbar {
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  height: 56px;
  gap: 1rem;
}
.navbar .brand { font-weight: 700; font-size: 1.1rem; color: #fff; flex: 1; }
.navbar a { color: rgba(255,255,255,0.85); font-size: 0.9rem; }
.navbar a:hover { color: #fff; text-decoration: none; }
.navbar form { margin: 0; }
.navbar button {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.4);
  color: rgba(255,255,255,0.85);
  border-radius: var(--radius);
  padding: 0.3rem 0.8rem;
  cursor: pointer;
  font-size: 0.875rem;
}
.navbar button:hover { background: rgba(255,255,255,0.1); }

/* ── Main content ── */
.container {
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

/* ── Forms ── */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-weight: 600; font-size: 0.9rem; }
.form-group input {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: border-color 0.15s;
}
.form-group input:focus { outline: none; border-color: var(--brand); }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.88; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-full { width: 100%; text-align: center; }

/* ── Alert ── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.alert-danger { background: #fdecea; border: 1px solid #f5c6cb; color: var(--danger); }

/* ── Login layout ── */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-box { width: 100%; max-width: 420px; }
.login-box h1 { margin: 0 0 0.25rem; color: var(--brand); font-size: 1.5rem; }
.login-box p.subtitle { margin: 0 0 1.5rem; color: var(--muted); font-size: 0.9rem; }