.dark-theme {
  /* Dark theme (default) */
  --bg-primary: #0a0e29;
  --bg-secondary: #1a1f3d;
  --border-color: #2a2f4d;
  --border-focus: #4a4f6d;
  --text-primary: #ffffff;
  --text-secondary: #c0c0d0;
  --text-muted: #a0a0b0;
  --accent-color: #8a5cf6;
  --accent-hover: #7c4dff;
  --error-color: #ff4d4f;
  --gradient-start: #1e40af;
  --gradient-end: #3b82f6;
  --toggle-bg: rgba(255, 255, 255, 0.2);
  --toggle-hover: rgba(255, 255, 255, 0.3);
  --toggle-icon: #ffffff;
}

.light-theme {
  /* Light theme */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #94a3b8;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-color: #8a5cf6;
  --accent-hover: #7c4dff;
  --error-color: #ef4444;
  --gradient-start: #93c5fd;
  --gradient-end: #3b82f6;
  --toggle-bg: rgba(0, 0, 0, 0.1);
  --toggle-hover: rgba(0, 0, 0, 0.2);
  --toggle-icon: #1e293b;
}

.login-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--bg-primary);
  padding: 2rem;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.login-form-wrapper {
  max-width: 400px;
  width: 100%;
  margin: 0 auto;
}

.login-header {
  margin-bottom: 1.5rem;
}

.login-title {
  font-size: 2rem;
  font-weight: bold;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  transition: color 0.3s ease;
}

.login-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  transition: color 0.3s ease;
}

.required::after {
  content: "*";
  color: var(--error-color);
  margin-left: 0.25rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  color: var(--text-primary);
  font-size: 1rem;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.form-input.error {
  border-color: var(--error-color);
}

.error-message {
  color: var(--error-color);
  font-size: 0.75rem;
  margin-top: 0.25rem;
  display: none;
  transition: color 0.3s ease;
}

.error-message.visible {
  display: block;
}

/* Code input styles */
.code-container {
  position: relative;
}

.code-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  color: var(--text-primary);
  font-size: 1rem;
  letter-spacing: 0.5rem;
  text-align: center;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.code-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* Agent code input styles */
.agent-code-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  color: var(--text-primary);
  font-size: 1rem;
  letter-spacing: 0.2rem;
  text-transform: uppercase;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.agent-code-input:focus {
  outline: none;
  border-color: var(--border-focus);
}

.timer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
}

.timer-text {
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: color 0.3s ease;
}

.timer {
  color: var(--accent-color);
  font-weight: 500;
  transition: color 0.3s ease;
}

.progress-bar {
  width: 100%;
  height: 4px;
  background-color: var(--border-color);
  border-radius: 2px;
  margin-top: 0.5rem;
  overflow: hidden;
  transition: background-color 0.3s ease;
}

.progress {
  height: 100%;
  background-color: var(--accent-color);
  width: 100%;
  transition: width 1s linear, background-color 0.3s ease;
}

.checkbox-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.remember-me {
  display: flex;
  align-items: center;
}

.checkbox {
  width: 1rem;
  height: 1rem;
  margin-right: 0.5rem;
  accent-color: var(--accent-color);
}

.checkbox-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color 0.3s ease;
}

.resend-code {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.3s ease;
}

.resend-code:hover {
  color: var(--text-primary);
}

.login-button, .send-code-button {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--accent-color);
  border: none;
  border-radius: 0.25rem;
  color: white;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.login-button:hover, .send-code-button:hover {
  background-color: var(--accent-hover);
}

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

.register-text {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  transition: color 0.3s ease;
}

.register-link {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.register-link:hover {
  color: var(--accent-hover);
}

.copyright {
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: color 0.3s ease;
}

.gradient-bg {
  display: none;
  width: 50%;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  position: relative;
  transition: background 0.3s ease;
}

.theme-toggle {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  background-color: var(--toggle-bg);
  border: none;
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.theme-toggle:hover {
  background-color: var(--toggle-hover);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--toggle-icon);
  transition: color 0.3s ease;
}

.hint-text {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 0.25rem;
  transition: color 0.3s ease;
}

@media (min-width: 768px) {
  .login-container {
    padding: 3rem;
  }

  .gradient-bg {
    display: block;
  }
}

/* Login Button Animation */
.login-button {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.login-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.login-button:active::before {
  width: 300px;
  height: 300px;
}

.login-button:active {
  transform: scale(0.95);
}

/* Loading state */
.login-button.loading {
  pointer-events: none;
  opacity: 0.8;
}

.login-button.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: button-spin 0.8s linear infinite;
}

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