:root {
  --primary-color: #0f172a;       /* dark blue */
  --text-color: #fff;
  --input-bg: #1e293b;
  --input-border: #334155;
  --btn-bg: #2563eb;
  --btn-hover: #1d4ed8;
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: white;
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 2rem;
}

.signin-container {
  max-width: 400px;
  width: 100%;
  background-color: var(--input-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
}

.signin-container h2 {
  text-align: center;
  margin-bottom: 1.5rem;
  font-weight: 600;
  color: var(--text-color);
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: #e2e8f0;
}

.form-group input {
  width: 90%;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--input-border);
  border-radius: 8px;
  background-color: var(--input-bg);
  color: var(--text-color);
    display: block;
  margin: 0 auto;
}

.form-group input::placeholder {
  color: #94a3b8;
}

button {
  width: 80%;
  padding: 12px;
  background-color: var(--btn-bg);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
  /* center the button only */
  display: block;
  margin: 0 auto;
}

button:hover {
  background-color: var(--btn-hover);
}

.footer-text {
  text-align: center;
  font-size: 0.85rem;
  margin-top: 1.5rem;
  color: #94a3b8;
}

.footer-text a {
  color: #60a5fa;
  text-decoration: none;
}

.footer-text a:hover {
  text-decoration: underline;
}

.signup-link {
  text-align: center;
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #94a3b8;
}

.signup-link a {
  color: #60a5fa;
  text-decoration: none;
  font-weight: 500;
}

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