:root {
  --primary-color: #2563eb;
  --secondary-color: #22c55e;
  --accent-color: #f59e0b;
  --dark-color: #0f172a;
  --light-color: #f8fafc;
  --card-bg: rgba(255, 255, 255, 0.06);
}

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

body {
  font-family: "Poppins", sans-serif;
  background: linear-gradient(135deg, var(--dark-color), #1e293b);
  color: var(--light-color);
  min-height: 100vh;
}

.hero {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card-bg);
  padding: 28px 20px;
  border-radius: 18px;
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
  text-align: center;
}

.card h1 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  font-weight: 600;
}

.card p {
  font-size: 0.95rem;
  opacity: 0.9;
  margin-bottom: 18px;
}

.change-password-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.change-password-form input {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  outline: none;
  font-size: 0.95rem;
  font-family: "Poppins", sans-serif;
}

.change-password-form input:focus {
  box-shadow: 0 0 0 2px var(--primary-color);
}

.btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: var(--secondary-color);
  color: white;
  font-size: 1rem;
  font-weight: 500;
  font-family: "Poppins", sans-serif;
  cursor: pointer;
}

.error {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.success {
  background: rgba(34, 197, 94, 0.15);
  color: #86efac;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .card {
    max-width: 430px;
    padding: 36px 28px;
  }

  .card h1 {
    font-size: 1.8rem;
  }
}

@media (min-width: 1024px) {
  .card {
    max-width: 470px;
  }
}