/* =========================================================
   Global reset
========================================================= */
* {
  box-sizing: border-box;
}

/* =========================================================
   Page background (Bootstrap-safe)
========================================================= */
body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  background:
    radial-gradient(1200px 600px at 10% -10%, #e0e7ff, transparent 40%),
    radial-gradient(1200px 600px at 90% 10%, #cffafe, transparent 40%),
    #f8fafc;
}

/* =========================================================
   Login card (RESPONSIVE by default)
========================================================= */
.login-box {
  width: 100%;              /* let Bootstrap column decide */
  padding: 28px 26px;

  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);

  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.6);

  box-shadow:
    0 20px 40px rgba(15, 23, 42, 0.12),
    0 2px 6px rgba(15, 23, 42, 0.06);

  animation: fadeUp 0.45s ease-out;
}

/* =========================================================
   Animation
========================================================= */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================================================
   Title
========================================================= */
.login-box h1 {
  margin: 0 0 22px;
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #0f172a;
}

/* =========================================================
   Inputs
========================================================= */
.login-box input {
  width: 100%;
  padding: 14px 15px;
  margin-bottom: 14px;

  border-radius: 8px;
  border: 1px solid #e2e8f0;
  background: #f8fafc;

  font-size: 15px;
  transition: border-color .2s, box-shadow .2s, background .2s;
}

.login-box input::placeholder {
  color: #94a3b8;
}

.login-box input:focus {
  outline: none;
  background: #ffffff;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* =========================================================
   Button
========================================================= */
.login-box button {
  width: 100%;
  padding: 14px;
  margin-top: 6px;

  border: none;
  border-radius: 10px;

  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;

  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2px;

  cursor: pointer;
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.35);
  transition: transform .15s ease, box-shadow .15s ease;
}

.login-box button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.45);
}

.login-box button:active {
  transform: translateY(0);
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.35);
}

/* =========================================================
   Mobile polish (not layout)
========================================================= */
@media (max-width: 480px) {
  .login-box {
    padding: 26px 22px;
  }

  .login-box h1 {
    font-size: 24px;
  }

  .login-box input,
  .login-box button {
    font-size: 16px; /* iOS no-zoom */
  }
}