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

:root {
  --arkaplan-ana: #f8f8f8;
  --arkaplan-ic: #fff;
  --f-renk: #000;
  --p-renk: #555;
  --label-renk: #444;
  --kenarlık: #ddd;
  --tablo-hover: #f3f3f3;
}

body.koyu {
  --arkaplan-ana: #121212;
  --arkaplan-ic: #1e1e1e;
  --f-renk: #fff;
  --p-renk: #ccc;
  --label-renk: #eee;
  --kenarlık: #2b2f2f;
  --tablo-hover: #181818;
}

body {
  font-family: "Arial", sans-serif;
  color: var(--f-renk);
  background: var(--arkaplan-ana);
  line-height: 1.6;
  padding: 30px 20px;
  display: flex;
  justify-content: center;
}

header {
  text-align: center;
}

h1, h2, h3 {
  font-weight: 600;
  margin-bottom: 15px;
  text-align: center;
}

h1 { font-size: 1.9rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.1rem; }

p {
  font-size: 1rem;
  margin-bottom: 15px;
  color: var(--p-renk);
  text-align: justify;
}

.onayAlan {
  font-size: 0.75rem;
  text-align: justify;
}

.indirAlan {
  background: var(--arkaplan-ic);
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 500px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-top: 20px;
  margin-bottom: 20px;
  padding: 20px 30px;
  animation: fadeIn 1s ease forwards;
  p {
    flex-grow: 1;
    font-size: 1.3rem;
    font-weight: 600;
  }
}

/* --- İkon Kutusu --- */
.icon {
    background: var(--arkaplan-ana);
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    margin-right: 15px;
    border: 1.5px solid var(--kenarlık);
}

/* --- İndirme Butonu --- */
.indir {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--arkaplan-ic);
    background-color: #007BFF;
    border: 1px solid #007BFF;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 10px;
}

.indir:hover {
  color: #007BFF;
  background-color: var(--arkaplan-ic);
}

/* --- Formların Alanı/Genel Arkaplan --- */
.alan {
  background: var(--arkaplan-ic);
  width: 100%;
  max-width: 960px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-top: 20px;
  margin-bottom: 20px;
  padding: 30px;
  animation: fadeIn 1s ease forwards;
}

/* --- Form --- */
form {
  display: grid;
  gap: 10px;
}

label {
  font-size: 1rem;
  color: var(--label-renk);
}

input, select, textarea {
  width: 100%;
  box-sizing: border-box; 
  padding: 15px;
  border: 1.5px solid var(--kenarlık);
  border-radius: 10px;
  font-size: 0.9rem;
  color: var(--f-renk);
  background: var(--arkaplan-ic);
  transition: border 0.25s ease, box-shadow 0.25s ease;
}

input:focus, select:focus {
  border-color: #bbb;
  outline: none;
}

input[type="checkbox"] {
  transform: scale(1.6);
  width: auto;
  margin-right: 5px;
}

/* --- Button --- */
button {
  padding: 15px;
  color: var(--label-renk);
  background-color: var(--arkaplan-ic);
  border: 1.5px solid var(--label-renk);
  border-radius: 10px;
  font-weight: 550;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.3s ease;
}

button:hover {
  color: var(--arkaplan-ic);
  background-color: var(--label-renk);
}

/* Mavi Button (mavi iç, beyaz yazı) */
.btn-mavi {
  color: var(--arkaplan-ic);
  background-color: #007BFF;
  border: 1px solid #007BFF;
}

.btn-mavi:hover {
  color: #007BFF;
  background-color: var(--arkaplan-ic);
}

.hesapla {
  margin: 10px;
  font-weight: 550;
  font-size: 0.8rem;
  color: var(--arkaplan-ic);
  background-color: #007BFF;
  border: 1px solid #007BFF;
}

.hesapla:hover {
  color: #007BFF;
  background-color: var(--arkaplan-ic);
}

/* --- Details/Açlılır Alanlar --- */
details {
  background: var(--arkaplan-ana);
  border: 1.5px solid var(--kenarlık);
  border-radius: 10px;
  padding: 15px;
  transition: all 0.3s ease;
  overflow: hidden;

  details {
    margin: 10px;

    summary {
      font-weight: 540; //Udaları adlarını daha kalın yapar.
    }
  }

  summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1.1rem;
    font-weight: 550; //Ders adlarını daha kalın yapar.;
    position: relative;

    span {
      margin-right: 10px;
      font-size: 0.8em;
      color: var(--p-renk);

      span {
        margin: 0px;
      }
    }
  }
}

summary::marker {
  display: none;
}

summary::after {
  content: "›";
  font-size: 1.2rem;
  position: absolute;
  right: 0;
  transition: transform 0.3s ease;
}

details[open] summary::after {
  transform: rotate(90deg);
}

details:hover {
  border-color: #121212;
}

/* --- Details içinde liste --- */
details ul {
  list-style: none;
  padding: 10px;
  width: 100%;
  background: var(--arkaplan-ic);
  border: 1.5px solid var(--kenarlık);
  border-radius: 10px;
}

details li{
  padding: 10px;
}

details li:not(:last-child) {
  border-bottom: 1.5px solid var(--kenarlık);
}

details li:hover {
  background: var(--tablo-hover);
}

details label {
  display: inline-block;
  width: 100%;
  cursor: pointer;
}

/* --- Tablo --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 30px;
  font-size: 0.9rem;

  td {
    padding: 5px;
    border-bottom: 1px solid var(--kenarlık);
  }

  th {
    padding: 5px;
    font-weight: 600;
    text-align: center;
    border-bottom: 1px solid var(--kenarlık);
  }

  tr:hover {
    background: var(--tablo-hover);;
  }

  input {
  padding: 8px;
  font-size: 0.8rem;
  }
}

/* --- Ders seçim alanı --- */
.dersAlan {
  display: inline-flex;
  align-items: center;
  padding: 15px 25px;
  cursor: pointer;
  user-select: none; /* Metnin kazara seçilmesini önler */
  transition: all 0.3s ease;
  font-size: 1.1rem;
  font-weight: 550; //Ders adlarını daha kalın yapar.
  background: var(--arkaplan-ic);
  border: 1.5px solid var(--kenarlık);
  border-radius: 10px;

  input[type="checkbox"] {
    display: none;
    cursor: pointer;
  }
}

.dersAlan:has(input:checked) {
    border-color: #007BFF;
    background-color: #E7F3FF;
    color: #007BFF;
  }

/* --- Detaylı seçim alanı --- */
.detayAlan {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); 
  gap: 10px;
  background: var(--arkaplan-ic);
  padding: 10px;
  margin-top: 15px;
  margin-bottom: 10px;
  border: 1.5px solid var(--kenarlık);
  border-radius: 10px;
} 

.detay {
  display: flex;
  flex-direction: column;
  padding: 10px;
  border: 1px solid var(--kenarlık);
  border-radius: 10px;
  background: var(--arkaplan-ana);

  label {
    text-allign: center;
    font-size: 0.85rem;
  }

  input, select {
    font-size: 0.85rem;
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--kenarlık);
    border-radius: 10px;
  }

  select[multiple] {
    height: auto;
    min-height: 90px;
  }
}

/* --- Problem Davranış alanı --- */
.problemDavranisAlan {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  background: var(--arkaplan-ic);
  padding: 10px;
  border: 1.5px solid var(--kenarlık);
  border-radius: 10px;

  textarea {
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
    width: 100%;
    padding: 10px;
    border: 1px solid var(--kenarlık);
    border-radius: 10px;
  }

  input[type="radio"] {
    display: none;
    position: absolute;
  }
}

.problemDavranisAlan .pd {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px 20px;
  color: var(--label-renk);
  background-color: var(--arkaplan-ic);
  border: 1.5px solid var(--label-renk);
  border-radius: 10px;
  font-weight: 550;
  font-size: 1rem;
  cursor: pointer;
  user-select: none;
  transition: background 0.3s ease, transform 0.3s ease;
}

/* "Yok" Seçildiğinde (Mavi Efekt) */
.problemDavranisAlan .pdYok:has(input[type="radio"]:checked) {
    border-color: #007BFF;
    background-color: #E7F3FF;
    color: #007BFF;
}

/* "Var" Seçildiğinde (Kırmızı Efekt) */
.problemDavranisAlan .pdVar:has(input[type="radio"]:checked) {
  background-color: #FEF2F2;
  border-color: #EF4444;
  color: #B91C1C;
}

.problemTanimAlan {
  width: 100%;
  display: flex;
  flex-direction: column;
}

/* --- Responsive --- */

@media (max-width: 600px) {
  body {
    padding: 10px 5px;
  }

  .problemDavranisAlan {
    flex-direction: column;
  }


  input[type="checkbox"] {
    transform: scale(1.2);
  }

  table, th, td {
    font-size: 0.8rem;
    padding: 0px;
  }

  /* --- Sayaçları yazının altına alır. --- */
  summary {
    flex-direction: column;
    align-items: flex-start;

    span {
      margin-right: 0px;
    }
  }
}