@import url('https://fonts.googleapis.com/css?family=Inter&display=swap');

:root {
  --bg-color: #f4f4f4;
  --calc-bg: #fff;
  --display-bg: #eee;
  --text-color: #000;
  --button-bg: #ddd;
  --button-text: #000;
  --operator-bg: #ffa94d;
  --equal-bg: #228be6;
}

.dark-theme {
  --bg-color: #1e1e1e;
  --calc-bg: #222;
  --display-bg: #000;
  --text-color: #fe9241;
  --button-bg: #444;
  --button-text: #fff;
  --operator-bg: #fe9241;
  --equal-bg: #0a84ff;
}

body {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  gap: 30px;
  padding: 20px;
  background: var(--bg-color);
  color: var(--text-color);
  transition: background 0.3s, color 0.3s;
  flex-wrap: wrap;
}

.calculator {
  background: var(--calc-bg);
  padding: 20px 15px;
  border-radius: 10px;
  max-width: 400px;
  width: 100%;
  margin-bottom: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  color: var(--text-color);
}

.main-container {
  display: flex;
  flex-direction: row; /* supaya kalkulator dan history sejajar */
  justify-content: center; /* supaya kalkulator dan history di tengah */
  align-items: flex-start; /* supaya kalkulator dan history di tengah */
  width: 100%;
  gap: 30px;
  padding: 20px;
  box-sizing: border-box;
}

.display {
  background: var(--display-bg);
  color: var(--text-color);
  font-size: 2em;
  padding: 10px;
  border-radius: 5px;
  margin-bottom: 10px;
  text-align: right;
  min-width: 200px;
  max-width: 100%;

  /* NEW: allow text to wrap */
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: normal;

  /* Make sure it can grow vertically */
  max-height: 150px;
  overflow-y: auto;

  font-family: monospace;
  display: block;
}


.buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  width: 100%;
  box-sizing: border-box;
}

button {
  padding: 20px;
  font-size: 1.2em;
  border: none;
  border-radius: 5px;
  background: var(--button-bg);
  color: var(--button-text);
  cursor: pointer;
  transition: background 0.3s, box-shadow 0.3s;
}

button.operator {
  background: var(--operator-bg);
}

button.equal {
  background: var(--equal-bg);
  color: #fff;
}

#del {
  padding: 1px;
  background-color: maroon;
  color: #fff;
}

body.dark-theme {
  background-color: #333;
}

.history {
  overflow-y: auto;
  align-items: center;
  background-color: var(--calc-bg);
  border-radius: 10px;
  padding: 15px;
  max-width: 400px;
  width: 100%;
  max-height: 500px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  color: var(--text-color);
}

.history h3 {
  margin-top: 0;
}

/* Hapus bullet dan tambahkan angka */
#history-list {
  list-style: none;
  padding-left: 0;
  counter-reset: history-counter;
}

#reset-history {
  font-size: 15px;
  text-align: center;
  align-items: center;
  display: block;
  margin-top: 10px;
  padding: 7px;
  background-color: #ff6b6b;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#reset-history:hover {
  background-color: #ff4d4d;
  box-shadow: 0 0 10px 2px #ff4d4d, 0 0 20px 4px #ff4d4d66;
}

button:hover, button:focus {
  box-shadow: 0 0 10px 2px var(--button-bg), 0 0 20px 4px var(--button-bg);
}

button.operator:hover, button.operator:focus {
  box-shadow: 0 0 10px 2px var(--operator-bg), 0 0 20px 4px var(--operator-bg);
}

button.equal:hover, button.equal:focus {
  box-shadow: 0 0 10px 2px var(--equal-bg), 0 0 20px 4px var(--equal-bg);
}

#del:hover, #del:focus {
  box-shadow: 0 0 10px 2px maroon, 0 0 20px 4px #80000088;
}

.history-entry {
  font-size: 1em;
  margin-bottom: 5px;
  padding-bottom: 5px;
  counter-increment: history-counter;
  position: relative;
  padding-left: 30px;
}

.history-entry::before {
  content: counter(history-counter) ". ";
  position: absolute;
  left: 0;
  color: var(--text-color);
  font-weight: bold;
}

/* Batasi lebar kalkulator agar konsisten */
.calculator {
  max-width: 280px;
  width: 100%;
}

/* Sesuaikan history agar sejajar */
.history {
  max-width: 280px;
  width: 100%;
  max-height: 500px;
  overflow-y: auto;
  background-color: var(--calc-bg);
  border-radius: 10px;
  padding: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  color: var(--text-color);
}

/* Button untuk expand fungsi */
.advanced-toggle-wrapper {
  margin-bottom: 10px;
  text-align: center;
}

.toggle-button {
  background-color: skyblue;
  border: none;
  padding: 6px 12px;
  font-size: 1em;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 5px;
  transition: background-color 0.2s;
}

.toggle-button:hover {
  background-color: #cbd5e0;
}

.advanced {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.hidden {
  display: none;
}
/* tutup Button untuk expand fungsi */

/* Responsif untuk mobile */
@media (max-width: 768px) {
  body {
    flex-direction: column;
    align-items: center;
    height: auto;
  }

  .main-container {
    flex-direction: column;
    align-items: center;
    height: auto;
  }

  .calculator,
  .history {
    max-width: 90vw;
    width: 100%;
    margin: 0 auto;               /* Pastikan di tengah */
  }

  .history {
    margin-top: 20px;             /* Beri jarak dari kalkulator */
    text-align: left;             /* Tetap rata kiri isi riwayat */
  }

  .theme-toggle button {
    position: static;
  }

  .buttons {
    grid-template-columns: repeat(4, 1fr); /* Gunakan proporsi fleksibel */
  }
}