/* Genel Ayarlar */
* {
  box-sizing: border-box;
}
body {
  font-family: 'Inter', sans-serif;
  background: #f8f9fb;
  color: #212529;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Başlık */
header {
  background: #0d6efd;
  color: white;
  text-align: center;
  padding: /*2rem*/ 0 1rem;
}
h1 {
  margin: 0;
  font-size: 2rem;
}
header p {
  font-size: 1.1rem;
  margin-top: 0.5rem;
}

/* Form Alanı */
.ders-karti {
  background: white;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.input-grup {
  display: flex;
  flex-direction: column;
}
.input-grup label {
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  font-weight: 600;
}
.input-grup input {
  padding: 0.6rem;
  font-size: 1rem;
  border: 1px solid #ced4da;
  border-radius: 6px;
  
  /*modif*/
      margin: 0 0 1rem 0;
}

/* Butonlar */
button {
  padding: 0.65rem 1.2rem;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
button[type="submit"] {
  background-color: #198754;
  color: white;
}
#yazdirBtn {
  background-color: #0d6efd;
  color: white;
  margin-left: 0.5rem;
}

/* Sonuç Kutusu */
.sonuc-karti {
  background: #e7f1ff;
  border-left: 6px solid #0d6efd;
  padding: 1rem;
  border-radius: 8px;
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 1rem;
}

/* Açıklamalar ve SSS */
section {
  margin-top: 2rem;
}
.formul-m {
  background: #fff;
  padding: 0.75rem 1rem;
  border-left: 4px solid #0d6efd;
  border-radius: 8px;
  margin-top: 1rem;
}
details {
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

/* Footer */
footer {
  background: #212529;
  color: white;
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
}