/* ===== CSS Variables - Mono Theme ===== */
:root {
  --bg-primary: #000000;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2d2d2d;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-tertiary: #808080;
  --border-color: #333333;
  --focus-color: #ffffff;
  --error-color: #ff4444;
  --success-color: #00cc00;
  --shadow-sm: 0 2px 8px rgba(255, 255, 255, 0.05);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.6);
  --border-radius: 4px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Base Styles ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1rem;
  position: relative;
  overflow-x: hidden;
}

/* Subtle mono background pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(45deg, var(--bg-secondary) 25%, transparent 25%),
    linear-gradient(-45deg, var(--bg-secondary) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--bg-secondary) 75%),
    linear-gradient(-45deg, transparent 75%, var(--bg-secondary) 75%);
  background-size: 80px 80px;
  background-position: 0 0, 0 40px, 40px -40px, -40px 0px;
  opacity: 0.03;
  pointer-events: none;
  z-index: 0;
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== Login Container ===== */
.login-container {
  position: relative;
  z-index: 1;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-wrapper {
  width: 100%;
  max-width: 420px;
}

/* ===== Logo Section ===== */
.logo-section {
  text-align: center;
  margin-bottom: 2.5rem;
  animation: fadeInDown 0.6s ease;
}

.logo-icon {
  width: 80px;
  height: 80px;
  display: inline-block;
  animation: float 3s ease-in-out infinite;
  object-fit: contain;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

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

/* ===== Login Card ===== */
.login-card {
  background: var(--bg-secondary);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: slideUp 0.6s ease;
  backdrop-filter: blur(10px);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-title {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.login-subtitle {
  margin: 0 0 2rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.3px;
}

/* ===== Form Groups ===== */
.form-group {
  margin: 1.5rem 0;
  text-align: left;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== Form Elements ===== */
.form-input {
  width: 100%;
  padding: 0.85rem 1.2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-family: "Courier New", monospace;
  background: var(--bg-tertiary);
  transition: var(--transition);
  color: var(--text-primary);
  letter-spacing: 0.3px;
}

.form-input:hover {
  border-color: var(--text-tertiary);
  background: rgba(45, 45, 45, 0.8);
}

.form-input:focus {
  outline: none;
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--text-primary);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

/* ===== Buttons ===== */
.login-btn {
  width: 100%;
  padding: 0.95rem 1.5rem;
  margin: 2rem 0 1rem;
  background: var(--text-primary);
  color: var(--bg-primary);
  border: 2px solid var(--text-primary);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.login-btn:hover {
  background: transparent;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.login-btn:active {
  transform: translateY(0);
}

.login-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.login-btn:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

/* ===== Divider ===== */
.divider {
  display: flex;
  align-items: center;
  margin: 1.5rem 0;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.divider span {
  padding: 0 1rem;
  font-weight: 600;
}

/* ===== Google Sign-In Button ===== */
.google-btn {
  width: 100%;
  padding: 0.95rem 1.5rem;
  margin: 0.5rem 0 1rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  letter-spacing: 0.5px;
}

.google-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--text-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.google-btn:active {
  transform: translateY(0);
}

.google-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.google-btn:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.google-icon {
  width: 20px;
  height: 20px;
  display: inline-block;
}

/* ===== Messages ===== */
.error-message {
  margin: 1.5rem 0 0;
  padding: 1rem;
  color: var(--error-color);
  background: rgba(255, 68, 68, 0.08);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  display: none;
  animation: shake 0.4s ease;
  text-align: center;
  font-weight: 500;
}

.error-message[style*="display: block"] {
  display: block;
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

/* ===== Footer ===== */
.footer-text {
  text-align: center;
  margin-top: 2.5rem;
  animation: fadeInUp 0.8s ease;
}

.footer-text p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Responsive Design ===== */
@media (max-width: 480px) {
  .logo-icon {
    font-size: 2.5rem;
  }

  .login-card {
    padding: 2rem 1.5rem;
  }
  
  .login-title {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
  }

  .login-subtitle {
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
  }
  
  .form-input,
  .login-btn {
    font-size: 16px; /* Prevents zoom on iOS */
  }

  .footer-text {
    margin-top: 2rem;
  }

  .footer-text p {
    font-size: 0.75rem;
  }
}