/* ===================== */
/* 🔧 Reset & Base Styles */
/* ===================== */
:root {
  --bg-color: #0d0d1b;
  --card-bg: #1a1a2e;
  --text-color: #c4c4e7;
  --primary-color: #4CAF50; /* Green */
  --secondary-color: #6a1b9a; /* Purple */
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-family: 'Inter', sans-serif;
  color: var(--text-color);
  background: var(--bg-color);
  overflow: hidden;
}

/* ===================== */
/* 🖥️ Layout & Animation */
/* ===================== */
.main-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1.5rem;
  position: relative;
  z-index: 1;
}

.main-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--secondary-color) 0%, transparent 40%),
              radial-gradient(circle, var(--primary-color) 0%, transparent 40%);
  background-size: 150vh 150vh, 150vh 150vh;
  background-position: top left, bottom right;
  opacity: 0.1;
  animation: bg-animate 15s ease-in-out infinite alternate;
  z-index: -1;
}

@keyframes bg-animate {
  0% { background-position: top left, bottom right; }
  100% { background-position: top right, bottom left; }
}

.login-card {
  background: rgba(26, 26, 46, 0.8);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  max-width: 400px;
  width: 100%;
  animation: fadeIn 1s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-header {
  text-align: center;
  padding: 2.5rem 2rem 0;
}

.logo-text {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.card-body {
  padding: 2rem;
}

.card-body h2 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-body p {
  color: #999;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* ===================== */
/* ✨ Form & Inputs */
/* ===================== */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.input-group {
  position: relative;
}

.input-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-color);
  display: block;
  margin-bottom: 0.5rem;
}

.input-group input {
  width: 100%;
  padding: 0.75rem 0.5rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.input-group input:focus {
  outline: none;
  border-bottom-color: var(--primary-color);
  box-shadow: 0 1px 0 0 var(--primary-color);
}

.input-group input::placeholder {
  color: #555;
}

.line {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.input-group input:focus + .line {
  transform: scaleX(1);
}

.login-btn {
  position: relative;
  overflow: hidden;
  width: 100%;
  padding: 1rem;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.btn-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--primary-color), transparent 70%);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.5s ease;
}

.login-btn:hover .btn-glow {
  transform: translate(-50%, -50%) scale(1.5);
}

.forgot-link {
  text-align: center;
  display: block;
  font-size: 0.9rem;
  color: #666;
  text-decoration: none;
  transition: color 0.3s ease;
}

.forgot-link:hover {
  color: var(--primary-color);
}

.Back {
  text-align: center;
  display: block;
  font-size: 0.9rem;
  color: #666;
  text-decoration: none;
  transition: color 0.3s ease;
}

.Back:hover {
  color: var(--primary-color);
}

/* ===================== */
/* 📱 Mobile Responsiveness */
/* ===================== */
@media (max-width: 500px) {
  .login-card {
    padding: 1.5rem;
  }
  .card-header, .card-body {
    padding: 1.5rem;
  }
}