/* ===============================
   GLOBAL STYLES
================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Arial, sans-serif;
}

body {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea, #764ba2);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background 0.3s;
}

body.dark {
  background: linear-gradient(135deg, #141e30, #243b55);
}

/* ===============================
   THEME TOGGLE
================================ */
#themeToggle {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 8px 12px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  background: #fff;
}

/* ===============================
   CONTAINER
================================ */
.container {
  width: 100%;
  max-width: 380px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* ===============================
   HEADINGS
================================ */
h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #fff;
}

/* ===============================
   INPUT GROUP
================================ */
.input-group {
  position: relative;
  margin-bottom: 22px;
}

.input-group input {
  width: 100%;
  padding: 12px 40px 12px 12px;
  border: none;
  border-radius: 8px;
  outline: none;
  font-size: 14px;
}

.input-group label {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #555;
  pointer-events: none;
  transition: 0.3s;
  background: #fff;
  padding: 0 4px;
  border-radius: 4px;
}

/* Floating label */
.input-group input:focus + label,
.input-group input:valid + label {
  top: -8px;
  font-size: 11px;
  color: #333;
}

/* ===============================
   PASSWORD TOGGLE
================================ */
.toggle {
  position: absolute;
  top: 12px;
  right: 10px;
  cursor: pointer;
}

/* ===============================
   PASSWORD STRENGTH BAR
================================ */
.strength {
  height: 5px;
  width: 0;
  border-radius: 4px;
  margin-top: 6px;
  transition: width 0.3s;
}

/* ===============================
   ERROR MESSAGE
================================ */
small {
  color: #ff4d4d;
  font-size: 12px;
  visibility: hidden;
}

.input-group.error small {
  visibility: visible;
}

/* ===============================
   BUTTON
================================ */
button {
  width: 100%;
  padding: 12px;
  background: #00f2fe;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: #4facfe;
}

/* ===============================
   LINKS
================================ */
p {
  color: #fff;
  font-size: 14px;
}

a {
  color: #00f2fe;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ===============================
   DASHBOARD
================================ */
#userInfo {
  white-space: pre-line;
  color: #fff;
  margin-bottom: 20px;
  font-size: 14px;
}

/* ===============================
   RESPONSIVE
================================ */
@media (max-width: 420px) {
  .container {
    margin: 20px;
  }
}