*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #111;
  color: #f0f0f0;
  font-family: system-ui, -apple-system, sans-serif;
}

.container {
  max-width: 480px;
  margin: 2rem auto;
  padding: 1rem;
}

h1 {
  font-size: 2.4rem;
  font-weight: 900;
  color: #fff120;
  margin: 0 0 0.25rem;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 0.95rem;
  color: #aaa;
  margin: 0 0 1.5rem;
}

#error-msg {
  background: #3b0000;
  border: 1px solid #c00;
  color: #ff8080;
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

#toast {
  background: #1a3a1a;
  border: 1px solid #4caf50;
  color: #81c784;
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #ccc;
  margin-top: 0.5rem;
}

input[type="text"],
textarea {
  font-size: 1.1rem;
  padding: 0.6rem;
  width: 100%;
  border-radius: 6px;
  box-sizing: border-box;
  background: #1e1e1e;
  border: 1px solid #444;
  color: #f0f0f0;
  outline: none;
  transition: border-color 0.15s;
}

input[type="text"]:focus,
textarea:focus {
  border-color: #fff120;
}

textarea {
  resize: vertical;
  min-height: 6rem;
}

#char-counter {
  font-size: 0.8rem;
  color: #888;
  text-align: right;
  margin-top: -0.25rem;
  transition: color 0.15s;
}

#char-counter.at-limit {
  color: #c00;
  font-weight: 700;
}

#submit-btn {
  background: #fff120;
  color: #000;
  border: none;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0.8rem 2rem;
  border-radius: 6px;
  cursor: pointer;
  width: 100%;
  margin-top: 0.75rem;
  transition: opacity 0.15s;
}

#submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#submit-btn:not(:disabled):hover {
  opacity: 0.88;
}