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

:root {
  --primary: #00d4ff;
  --secondary: #1a1a1a;
  --bg: #0a0a0a;
  --text: #e0e0e0;
  --border: #333;
}

.dark-theme {
  background-color: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.auth-box {
  background: #1e1e1e;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.auth-box h1 {
  color: var(--primary);
  font-size: 28px;
  margin-bottom: 10px;
  text-align: center;
}

.subtitle {
  color: #888;
  text-align: center;
  margin-bottom: 30px;
  font-size: 14px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  color: var(--text);
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 14px;
}

.form-group input {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #0a0a0a;
  color: var(--text);
  transition: border-color 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group input::placeholder {
  color: #666;
}

.btn {
  padding: 12px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s;
  font-size: 16px;
}

.btn-primary {
  background: var(--primary);
  color: #000;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.auth-link {
  text-align: center;
  color: #888;
  font-size: 14px;
}

.auth-link a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.auth-link a:hover {
  text-decoration: underline;
}

.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 15px;
}

.alert-error {
  background: rgba(244, 67, 54, 0.1);
  color: #f44336;
  border: 1px solid #f44336;
}