* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 40%, #041d52 100%);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  /* overflow: hidden; */
  color: #eaf1ff;
}

/* Animated background glow */
.background-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: radial-gradient(circle at 30% 30%, rgba(75,124,255,.35), transparent 60%);
  filter: blur(120px);
  z-index: 0;
}

@keyframes float {
  from { transform: translate(-100px, -50px); }
  to { transform: translate(100px, 80px); }
}

.login-wrapper {
  position: relative;
  z-index: 2;
}

.card {
  width: 420px;
  padding: 40px;
  border-radius: 24px;
  backdrop-filter: blur(25px);
  background: rgba(18, 27, 47, 0.75);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 
    0 20px 50px rgba(0,0,0,.5),
    inset 0 0 40px rgba(75,124,255,.1);
}

.logo {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 2px;
  margin-bottom: 10px;
  background: linear-gradient(90deg, #4b7cff, #7aa2ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h1 {
  margin: 0;
  font-size: 24px;
}

.subtitle {
  font-size: 13px;
  opacity: .7;
  margin-bottom: 25px;
}

label {
  display: block;
  font-size: 12px;
  margin-top: 16px;
  margin-bottom: 6px;
  opacity: .8;
}

input {
  width: 100%;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.1);
  background: rgba(11, 18, 32, .8);
  color: #fff;
  outline: none;
  font-size: 14px;
  transition: all .1s ease;
}

input:focus {
  border-color: #4b7cff;
  box-shadow: 0 0 0 3px rgba(75,124,255,.25);
  /* transform: scale(1.02); */
}

.input-group {
  position: relative;
}

.toggle-password {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  opacity: .6;
  transition: .3s;
}

.toggle-password:hover {
  opacity: 1;
}

button {
  margin-top: 25px;
  width: 100%;
  padding: 14px;
  border-radius: 14px;
  border: none;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  background: linear-gradient(135deg, #4b7cff, #1d4ed8);
  color: white;
  position: relative;
  overflow: hidden;
  transition: all .3s ease;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(75,124,255,.4);
}

button:active {
  transform: scale(.98);
}

.loader {
  display: none;
  width: 18px;
  height: 18px;
  border: 3px solid rgba(255,255,255,.3);
  border-top: 3px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-left: 8px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.msg {
  margin-top: 15px;
  font-size: 13px;
  min-height: 18px;
  opacity: .85;
  transition: .3s;
}


/* ============================= */
/* RESPONSIVE DESIGN */
/* ============================= */

/* Large tablets & small laptops */
@media (max-width: 1024px) {
  .card {
    width: 90%;
    max-width: 480px;
  }
}

/* Tablets */
@media (max-width: 768px) {
  body {
    padding: 20px;
    height: auto;
    min-height: 100vh;
  }

  .card {
    width: 100%;
    padding: 32px 24px;
    border-radius: 20px;
  }

  h1 {
    font-size: 22px;
  }
}

/* Mobile phones */
@media (max-width: 480px) {
  body {
    padding: 16px;
    overflow: auto;
  }

  .card {
    width: 100%;
    max-width: 100%;
    padding: 20px;
    border-radius: 18px;
  }

  .logo {
    font-size: 18px;
  }

  h1 {
    font-size: 20px;
  }

  .subtitle {
    font-size: 12px;
  }

  input {
    padding: 12px;
    font-size: 13px;
  }

  button {
    padding: 12px;
    font-size: 14px;
  }
}

/* Very small devices */
@media (max-width: 360px) {
  .card {
    padding: 20px 14px;
  }

  input {
    padding: 10px;
  }

  button {
    padding: 10px;
  }
}