/* ==========================================================
   School ERP — Simple Premium Login Page
   Palette: Primary #2563EB/#3B82F6 · Secondary #0F172A/#1E293B
            Success #22C55E · Warning #F59E0B · Danger #EF4444
            Background #F8FAFC
   ========================================================== */

:root{
  --primary-600:#2563EB;
  --primary-500:#3B82F6;
  --ink-900:#0F172A;
  --danger:#EF4444;
  --bg:#F8FAFC;
}

body{
  font-family:'Inter', sans-serif;
}
.font-display{ font-family:'Plus Jakarta Sans', sans-serif; }

/* ---------- Soft background ---------- */
.login-bg{
  background:
    radial-gradient(800px 400px at 15% 0%, rgba(59,130,246,0.08), transparent 60%),
    radial-gradient(700px 400px at 100% 100%, rgba(37,99,235,0.06), transparent 60%),
    var(--bg);
}

/* ---------- Simple glass card ---------- */
.glass-card{
  background:rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border:1px solid rgba(255,255,255,0.7);
  box-shadow: 0 10px 40px -12px rgba(15,23,42,0.15);
}

/* ---------- Logo badge ---------- */
.logo-badge{
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  box-shadow: 0 6px 16px -4px rgba(37,99,235,0.4);
}

/* ---------- Inputs ---------- */
.field-input{
  transition: box-shadow .2s ease, border-color .2s ease;
}
.field-input:focus{
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.field-input.border-red-500{
  border-color: var(--danger) !important;
}

/* ---------- Primary button ---------- */
.btn-primary{
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  transition: transform .15s ease, box-shadow .25s ease, filter .25s ease;
  box-shadow: 0 6px 16px -4px rgba(37,99,235,0.45);
}
.btn-primary:hover{
  transform: translateY(-1px);
  filter: brightness(1.05);
}
.btn-primary:active{ transform: translateY(0); }

.spinner{
  width:16px;height:16px;
  border:2px solid rgba(255,255,255,0.4);
  border-top-color:#fff;
  border-radius:50%;
  animation: spin .7s linear infinite;
}
@keyframes spin{ to{ transform:rotate(360deg); } }

/* ---------- Simple fade-in on load ---------- */
.fade-in{
  animation: fadeIn .5s ease-out both;
}
@keyframes fadeIn{
  from{ opacity:0; transform:translateY(10px); }
  to{ opacity:1; transform:translateY(0); }
}

/* ---------- Accessibility ---------- */
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce){
  .fade-in, .btn-primary{ animation:none !important; transition:none !important; }
}