:root {
    --clr-bg-dark: #121212;
    --clr-bg-light: #f0f0f0;
    --clr-glass-dark: rgba(18, 18, 18, 0.7);
    --clr-glass-light: rgba(255, 255, 255, 0.7);
    --clr-glow-dark: rgba(72, 187, 120, 0.5);
    --clr-glow-light: rgba(72, 120, 187, 0.5);
    --clr-success: #48bb78;
    --clr-warning: #f6ad55;
    --clr-error: #f56565;
    --clr-text-dark: #eee;
    --clr-text-light: #222;
  }
  
  /* Reset & basics */
  * {
    box-sizing: border-box;
  }
  body {
    margin: 0; padding: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #2a2a2a, #121212);
    color: var(--clr-text-dark);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.4s ease, color 0.4s ease;
  }
  body.light-mode {
    background: linear-gradient(135deg, #e6f0ff, #d9e8ff);
    color: var(--clr-text-light);
  }

  /* Container */
  main.container {
    width: min(92%, 400px);
    background: var(--clr-glass-dark);
    backdrop-filter: blur(12px);
    border-radius: 16px;
    box-shadow: 0 0 10px var(--clr-glow-dark);
    padding: 32px 28px 36px;
    position: relative;
    overflow: hidden;
    transition: background 0.4s ease, box-shadow 0.4s ease;
  }
  body.light-mode main.container {
    background: var(--clr-glass-light);
    box-shadow: 0 0 10px var(--clr-glow-light);
  }

  form.active {
    animation: fadeInUp 0.5s ease-out forwards;
  }
  
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  /* Mode toggle button top-right */
  #modeToggle {
    position: absolute;
    top: 14px;
    right: 14px;
    background: transparent;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: inherit;
    user-select: none;
    outline-offset: 2px;
    
      transition: transform 0.4s ease;
    }
    body.light-mode #modeToggle {
      transform: rotate(180deg);
    }
  

  #innerFormSection .hidden {
    display: none;
  }
  #innerFormSection form {
    display: none;
  }
  #innerFormSection form.active {
    display: block;
  }
  #innerFormSection .hidden {
    display: none;
  }
  /* Tabs for Login / Register */
  .tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
  }
  .tab {
    cursor: pointer;
    padding: 10px 28px;
    margin: 0 6px;
    font-weight: 600;
    border-radius: 24px;
    background: transparent;
    color: inherit;
    border: 2px solid transparent;
    user-select: none;
    transition: background-color 0.3s ease, border-color 0.3s ease;
  }
  .tab[aria-selected="true"] {
    background-color: var(--clr-success);
    color: #fff;
    border-color: var(--clr-success);
    box-shadow: 0 0 8px var(--clr-success);
  }

  .tab {
    position: relative;
  }
  .tab::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0%;
    height: 2px;
    background-color: currentColor;
    transition: all 0.3s ease;
    transform: translateX(-50%);
  }
  .tab[aria-selected="true"]::after {
    width: 80%;
  }

  body.light-mode .tab[aria-selected="true"] {
    background-color: #2c82c9;
    border-color: #2c82c9;
    box-shadow: 0 0 8px #2c82c9;
  }

  /* Forms */
  form {
    display: none;
    flex-direction: column;
  }
  form.active {
    display: flex;
  }

  label {
    font-size: 0.95rem;
    margin-bottom: 4px;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"] {
    padding: 10px 12px;
    margin-bottom: 16px;
    font-size: 1rem;
    border-radius: 8px;
    border: 2px solid transparent;
    background: rgba(255 255 255 / 0.12);
    color: inherit;
    transition: border-color 0.3s ease;
  }
  body.light-mode input[type="text"],
  body.light-mode input[type="email"],
  body.light-mode input[type="password"] {
    background: rgba(0 0 0 / 0.06);
  }
  input:focus {
    border-color: #48bb78;
    box-shadow: 0 0 0 3px rgba(72, 187, 120, 0.3), 0 0 12px rgba(72, 187, 120, 0.6);
  }
  input[aria-invalid="true"] {
    border-color: var(--clr-error);
    box-shadow: 0 0 8px var(--clr-error);
  }

  /* Password container with toggle */
  .password-container {
    position: relative;
    display: flex;
    align-items: center;
  }
  .password-container input {
    flex: 1;
    margin-bottom: 16px;
  }
  .password-toggle {
    position: absolute;
    right: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 6px 8px;
    user-select: none;
    color: inherit;
  }

  /* Password strength bar and text */
  .strength-bar {
    height: 6px;
    width: 0;
    border-radius: 4px;
    margin-bottom: 8px;
    transition: width 0.3s ease, background-color 0.3s ease;
  }
  .strength-text {
    font-size: 0.85rem;
    margin-bottom: 20px;
    min-height: 20px;
  }

  /* Submit buttons */
  .btn {
    padding: 12px 0;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 24px;
    border: none;
    cursor: pointer;
    background: var(--clr-success);
    color: white;
    user-select: none;
    box-shadow: 0 4px 10px var(--clr-success);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
  }
  .btn:disabled {
    background: #999;
    cursor: not-allowed;
    box-shadow: none;
  }
  .btn:hover:not(:disabled) {
    background: #3aa55a;
    box-shadow: 0 6px 14px #3aa55a;
  }
  body.light-mode .btn {
    background: #2c82c9;
    box-shadow: 0 4px 10px #2c82c9;
  }
  body.light-mode .btn:hover:not(:disabled) {
    background: #1e5e94;
    box-shadow: 0 6px 14px #1e5e94;
  }

  /* Voice input button */
  .voice-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
    font-size: 1rem;
    color: var(--clr-success);
    margin-bottom: 16px;
    outline-offset: 2px;
    border-radius: 12px;
    padding: 6px 14px;
    border: 2px solid var(--clr-success);
    background: rgba(72, 187, 120, 0.1);
    transition: background-color 0.3s ease;
  }
  .voice-btn.listening {
    background: var(--clr-success);
    color: #fff;
  }
  .voice-btn:focus-visible {
    outline: 2px solid var(--clr-success);
    outline-offset: 3px;
  }
  .mic-anim {
    width: 12px; height: 12px;
    background: currentColor;
    border-radius: 50%;
    animation: pulse 1.2s infinite ease-in-out;
  }
  @keyframes pulse {
    0%, 100% {opacity: 0.3;}
    50% {opacity: 1;}
  }

  /* Social login buttons container */
  .social-login {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 12px;
    margin-bottom: 4px;
  }
  .social-btn {
    flex: 1;
    padding: 10px 0;
    font-weight: 600;
    border-radius: 24px;
    border: none;
    cursor: pointer;
    user-select: none;
    transition: box-shadow 0.3s ease;
    color: white;
    font-size: 0.9rem;
  }
  .social-btn.facebook {
    background: #3b5998;
    box-shadow: 0 4px 8px #3b5998cc;
  }
  .social-btn.facebook:hover {
    box-shadow: 0 6px 14px #3b5998dd;
  }
  
  .social-btn.google:hover {
    box-shadow: 0 6px 14px #db4437dd;
  }

  
  .social-btn {
    padding: 10px 20px;
    margin: 5px;
    border: none;
    border-radius: 20px;
    font-weight: bold;
    cursor: pointer;
    background: #eee;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  }
  
  .social-btn.facebook {
    background-color: #3b5998;
    color: white;
  }
  /* Input Wrapper */
.input-group {
  position: relative;
  margin-bottom: 24px;
}

/* Input Field */
.input-group input[type="text"],
.input-group input[type="email"],
.input-group input[type="password"] {
  width: 100%;
  padding: 14px 12px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid transparent;
  border-radius: 12px;
  color: var(--clr-text-dark);
  transition: border 0.3s ease, background 0.3s ease;
}

/* Light Mode Input Styling */
body.light-mode .input-group input[type="text"],
body.light-mode .input-group input[type="email"],
body.light-mode .input-group input[type="password"] {
  background: rgba(0, 0, 0, 0.06);
  color: var(--clr-text-light);
}

/* Focus State */
.input-group input[type="text"]:focus,
.input-group input[type="email"]:focus,
.input-group input[type="password"]:focus {
  outline: none;
  border-color: var(--clr-success);
  box-shadow: 0 0 8px var(--clr-success);
  background: rgba(255, 255, 255, 0.15);
}

/* Error State */
.input-group input[aria-invalid="true"] {
  border-color: var(--clr-error);
  box-shadow: 0 0 8px var(--clr-error);
}

/* Floating Label */
.input-group label {
  position: absolute;
  top: 50%;
  left: 12px;
  transform: translateY(-50%);
  color: #aaa;
  pointer-events: none;
  font-size: 1rem;
  transition: all 0.25s ease;
  background: transparent;
  padding: 0 4px;
}

/* Floating Effect When Input is Focused or Has Value */
.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label {
  top: -8px;
  left: 10px;
  font-size: 0.75rem;
  color: var(--clr-success);
  background: var(--clr-glass-dark);
  padding: 0 6px;
  border-radius: 6px;
}

/* Light Mode Floating Label Background */
body.light-mode .input-group input:focus + label,
body.light-mode .input-group input:not(:placeholder-shown) + label {
  background: var(--clr-glass-light);
}

  form {
    margin-bottom: 30px;
  }
  
  section#recover-email-form {
    margin-top: 30px;
    padding: 15px;
    background-color: rgba(255,255,255,0.05);
    border-radius: 10px;
  }

  .voice-btn.listening {
    background-color: #f0f8ff;
    box-shadow: 0 0 10px #00f;
    animation: pulse 1s infinite;
  }

  @keyframes pulse {
    0% { box-shadow: 0 0 5px #00f; }
    50% { box-shadow: 0 0 20px #00f; }
    100% { box-shadow: 0 0 5px #00f; }
  }

/* Recover Email Link */
.recover-link {
  margin-top: 25px;
  text-align: center;
  font-size: 14px;
  color: #555;
}

.recover-link a {
  color: #3498db;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease, text-decoration 0.3s ease;
}

.recover-link a:hover {
  color: #1e70bf;
  text-decoration: underline;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  .recover-link {
    color: #ccc;
  }

  .recover-link a {
    color: #3b82f6;
  }

  .recover-link a:hover {
    color: #60a5fa;
  }
}

.password-recovery {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 16px;
  color: #c1c0fd;
  margin: 20px 0;
}

.password-recovery button {
  margin-left: 10px;
  padding: 6px 14px;
  font-size: 14px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.3s ease;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

main.container::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 2px;
  border-radius: 18px;
  background: linear-gradient(45deg, #48bb78, #2c82c9, #db4437);
  z-index: -1;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: destination-out;
}

.btn:hover:not(:disabled),
.social-btn:hover {
  transform: scale(1.03);
  transition: transform 0.2s ease, background-color 0.3s ease;
}

#modeToggle {
  transition: transform 0.4s ease;
}
body.light-mode #modeToggle {
  transform: rotate(180deg);
}