@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&family=Noto+Serif+Bengali:wght@100..900&family=Spline+Sans+Mono:ital,wght@0,300..700;1,300..700&display=swap');


@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --fg-color: #fff;
        --nav-color: #333;
        --green: #4CAF50;
        --yellow: #FFC107;
        --red: #F44336;
    }
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-color: #fff;
        --fg-color: #000;
        --nav-color: #c1c1c1;
        --green: #4CAF50;
        --yellow: #FFC107;
        --red: #F44336;
    }
}

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

body {
    background-color: var(--bg-color);
    color: var(--fg-color);
    font-family: 'Inter', 'Noto Serif Bengali', sans-serif;
    font-size: 16px;
}
main {
    padding: 1rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--nav-color);
    color: var(--fg-color);
}

h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

button {
    border: none;
    background-color: transparent;
    font-size: 1.5rem;
    cursor: pointer;
}

svg {
    fill: var(--fg-color);
}

hr {
    width: 100%;
    border: none;
    border-top: 2px solid var(--fg-color);
    margin: 1rem 0;
}

.grid {
    display: grid;
    gap: 0.5rem;
    margin: 0 auto;
    justify-content: center;
    align-items: center;
}

.row {
    display: grid;
    grid-template-columns: repeat(2, 5rem);
    gap: 0.5rem;
}

.cell {
    width: 100%;
    aspect-ratio: 1;
    border: 2px solid #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    text-transform: uppercase;
}

.input {
    display: flex;
    justify-content: center;
    margin: 1rem 0;
}

input {
    font-family: inherit;
    font-size: 1.5rem;
    background-color: var(--nav-color);
    color: var(--fg-color);
    padding: 0.5rem;
    border: 2px solid #ddd;
    border-radius: 0.5rem;
    text-align: center;
}

/* Style the popup container */
.popup-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: none;
}

/* Style the popup content */
.popup-content {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--nav-color);
  color: var(--fg-color);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

/* Style the close button */
#close-button {
  background-color: var(--green);
  color: #fff;
  border: none;
  border-radius: 5px;
  padding: 10px 20px;
  margin-top: 10px;
  font-size: 16px;
  cursor: pointer;
}