/* reset & variables */
:root {
  --primary: #ff6b35;
  --primary-hover: #e85d2a;
  --success: #10b981;
  --error: #ef4444;
  --bg-light: #fff5f2;
}

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

body {
  background-color: var(--bg-light);
  font-family: "Poppins", sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

/* container */
.container {
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
  padding: 30px;
  overflow: hidden;
}

h1 { text-align: center; color: #333; margin-bottom: 1.2rem; }

/* form fields */
.form-group { margin-bottom: 20px; position: relative; }

label {
  display: block;
  margin-bottom: 5px;
  color: #555;
  font-weight: 600;
}

input {
  border: 2px solid #f0f0f0;
  border-radius: 4px;
  display: block;
  width: 100%;
  padding: 10px;
  font-size: 14px;
  transition: border-color 0.3s;
}

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

small {
  visibility: hidden;
  position: absolute;
  bottom: -18px;
  left: 0;
  font-size: 12px;
}

/* submit button */
button {
  cursor: pointer;
  background: var(--primary);
  border: none;
  color: white;
  display: block;
  font-size: 1rem;
  margin-top: 20px;
  padding: 12px;
  border-radius: 4px;
  width: 100%;
  transition: background-color 0.3s;
}

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

/* validation states */
.form-group.error input { border-color: var(--error); }
.form-group.success input { border-color: var(--success); }
.form-group.error small { visibility: visible; color: var(--error); }