@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap');

:root {
  --bg:    #F1F5F9;
  --card:  #FFFFFF;
  --text:  #1E293B;
  --muted: #64748B;
  --line:  #E2E8F0;
  --btn:   #3B82F6;
  --btn-d: #2563EB;
  --blue:  #3B82F6;
  --teal:  #14B8A6;
  --orange:#F97316;
  --green: #10B981;
  --pink:  #EC4899;
  --yellow:#F59E0B;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Nunito', system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.container {
  max-width: 1050px;
  margin: 0 auto;
  padding: 16px;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 12px rgba(59,130,246,.07);
  z-index: 100;
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -.3px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand::before {
  content: '';
  display: inline-block;
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--blue), var(--teal));
  border-radius: 8px;
}

.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 7px 14px;
  border-radius: 10px;
  font-weight: 700;
  font-size: .9rem;
  transition: background .15s, color .15s;
}
.nav a:hover { background: #EFF6FF; color: var(--blue); }
.nav a.active { background: #EFF6FF; color: var(--blue); }

/* Colorbar */
.topbar::after {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg,
    var(--blue) 16.6%,
    var(--orange) 16.6% 33.2%,
    var(--teal) 33.2% 49.8%,
    var(--pink) 49.8% 66.4%,
    var(--green) 66.4% 83%,
    var(--yellow) 83%);
}

h1, h2 { margin: 18px 0 10px; font-weight: 800; color: var(--text); }

/* Card */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 2px 16px rgba(59,130,246,.06);
}

.row { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; }
.grid { display: flex; gap: 10px; flex-wrap: wrap; margin: 10px 0; }

label {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
}

input, select {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1.5px solid var(--line);
  background: #F8FAFC;
  color: var(--text);
  font-family: 'Nunito', sans-serif;
  font-size: .95rem;
  font-weight: 600;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
input:focus, select:focus {
  border-color: var(--blue);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(59,130,246,.13);
}

button, .btn {
  background: linear-gradient(135deg, var(--btn), var(--btn-d));
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: 700;
  font-family: 'Nunito', sans-serif;
  font-size: .9rem;
  text-decoration: none;
  display: inline-block;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(59,130,246,.3);
  transition: transform .15s, box-shadow .15s, filter .15s;
}
button:hover, .btn:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(59,130,246,.38);
}

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}
.table thead {
  background: #F8FAFC;
  border-bottom: 2px solid var(--line);
}
.table th {
  padding: 12px 14px;
  text-align: left;
  font-size: .72rem;
  font-weight: 800;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .07em;
}
.table td {
  border-bottom: 1px solid #F1F5F9;
  padding: 12px 14px;
  font-weight: 600;
}
.table tbody tr:hover { background: #F8FAFC; }
.table tbody tr:last-child td { border-bottom: none; }

.link { color: var(--blue); text-decoration: none; font-weight: 700; }
.link:hover { text-decoration: underline; }

.alert {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  color: #DC2626;
  padding: 12px 16px;
  border-radius: 12px;
  margin: 10px 0;
  font-weight: 600;
}

.muted { color: var(--muted); }

.footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding: 16px 0;
  color: var(--muted);
  font-size: .85rem;
}
.footer strong { color: var(--blue); }

@media (max-width: 820px) {
  .row { grid-template-columns: 1fr; }
}