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

body {
  font-family: "Segoe UI", sans-serif;
  background-color: #f4f6f8;
  color: #333;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background-color: #2b2b2b;
  padding: 2rem 1rem;
}

.sidebar .logo img {
  width: 100%;
  margin-bottom: 2rem;
}

.sidebar nav a {
  display: block;
  color: #ccc;
  text-decoration: none;
  margin: 1rem 0;
  padding: 0.5rem;
  border-radius: 4px;
  transition: background 0.2s;
}

.sidebar nav a.active,
.sidebar nav a:hover {
  background-color: #2e2e4d;
  color: #fff;
}

.main {
  flex: 1;
  padding: 3rem;
}

.form-container {
  background-color: #fff;
  padding: 2rem;
  border-radius: 8px;
  max-width: 600px;
  margin: auto;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
}

.form-container h2 {
  margin-bottom: 1.5rem;
  color: #222;
}

.input-group {
  margin-bottom: 1rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.input-group input,
.input-group select {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.row {
  display: flex;
  gap: 1rem;
}

.row .input-group {
  flex: 1;
}

button {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  margin-top: 1rem;
}

button:hover {
  background-color: #0056b3;
}

.inbox {
  margin-top: 2rem;
  background: #f0f0f0;
  padding: 1rem;
  border-radius: 6px;
}

.inbox h3 {
  margin-bottom: 0.5rem;
}

#copy-btn {
  margin-top: 0.5rem;
  padding: 0.5rem 1rem;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

#copy-btn:hover {
  background: #218838;
}

.how-to-use {
  max-width: 700px;
  margin: 40px auto;
  padding: 25px;
  background-color: #ffffff;
  border: 1px solid #ddd;
  border-radius: 8px;
  color: #111111; /* Siyah gibi görünür */
  font-size: 15px;
  line-height: 1.6;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}