body {
    font-family: "Lexend", system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f7f9fd;
    font-optical-sizing: auto;
    font-weight: 350;
    font-style: normal;
    margin: 0;
    min-height: 100%;

    /* responsiveness */
    max-width: 1536px;
    margin-left: auto;
    margin-right: auto;
    transition: color 0.25s;
}

#navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: #c7d2fb;
    border-bottom: 1px solid #9890f5;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.logo a {
    font-size: 1.6rem;
    font-weight: bold;
    text-decoration: none;
    color: #2e278f;
}

.nav-links {
    display: flex;
    gap : 20px;
    align-items: center;
}

.nav-link {
    background-color: #c7d2fb;
    text-decoration: none;
    color: #333;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.75s;
    cursor: pointer;
}

.theme-toggle {
    background-color: #c7d2fb;
    border: none;
    border-radius: 5px;
    padding: 5px 10px;
    cursor: pointer;
    color: #888888;
    transition: color 0.75s;
}
#lucid-dry {
    fill: #888;
    transition: fill 0.75s;
}
#lucid-dry:hover {
    fill: #000;
}

.nav-link:hover {
    background-color: #a1b3f7;
    color: #f7f9fd;
}
.nav-link:active {
    background-color: #7893f5;
}

.theme-toggle:hover {
    color: #000;
    fill: #000;
}

header{
    text-align: center;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}
span {
    color: #2e278f;
}

.container {
    width: 90vw;
    max-width: 62.5em;
    border-radius: 5px;
    margin: auto; /* space distributed evenly in div */
    background-color: #fafafa;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.create-flashcard-content {
    display: flex;
    padding: 10px;
    flex-direction: row; /* default */
    justify-content: flex-end;
}

#create-flashcardBtn {
    padding: 10px 15px;
    background-color: rgb(94, 94, 255);
    color: #fafafa;
    border: none;
    border-radius: 5px;
    font-weight: 800;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    cursor: pointer;
}
#create-flashcardBtn:hover {
    background-color:rgb(75, 75, 255);
}
#create-flashcardBtn:active {
    background-color: rgb(45, 45, 255);
}

#deck {
    border: 1px solid black;
    margin-top: 1em;
}

.prompt-container {
    max-width: 34em;
    display: flex;
    flex-direction: column;
    padding: 0;
    justify-content: center;
    background-color: #fff;
    position: absolute;
    transform: translate(-50%, -50%);
    top: 50%;
    left: 50%;
    padding: 2.5rem 2rem;
    border-radius: 6px;
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.1);
}
.prompt-container h2 {
    font-size: 2.2rem;
    font-weight: bold;
    margin: 0;
    color: #363d55;
    font-weight: 800;
    text-align: center;
    margin-bottom: 4rem;
}
.wrapper {
    display: grid;
    grid-template-columns: 11fr 1fr;
    gap: 1em;
    margin-bottom: 1rem;
}
.error-con {
    align-self: center;
}
#error {
    color: #ff583b;
    font-weight: 900;
    font-size: 15px;
}
.fa-xmark {
    font-size: 1.4rem;
    background-color: rgb(94, 94, 255);
    color: #ff583b;
    height: 2.5rem;
    width: 2.5rem;
    display: grid;
    text-align: center;
    align-content: center;
    border-radius: 5px;
    cursor: pointer;
}
.fa-xmark:hover {
    background-color: rgb(75, 75, 255);
}
.fa-xmark:active {
    background-color: rgb(45, 45, 255);
}

label {
    font-weight: 500;
}
textarea {
    width: 96%;
    padding: 0.5rem 0.5rem;
    border: 1px solid #d0d0d0;
    outline: none;
    color: #414a67;
    border-radius: 5px;
    resize: none;
    margin-bottom: 1rem;
}
textarea:focus {
    border-color: #363d55;
}
#save-btn {
    padding: 10px 0;
    font-size: 1rem;
    font-weight: 600;
    background-color: rgb(94, 94, 255);
    border: none;
    border-radius: 5px;
    color: hsl(122, 94%, 79%);
    cursor: pointer;
}
#save-btn:hover {
    background-color: rgb(75, 75, 255);
}
#save-btn:active {
    background-color: rgb(45, 45, 255);
}

#deck {
   border: none;
}
#deck h3{
    width: 3fr;
    padding: 0 5px;
    color: #333;
    background-color: #f7f9fd;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid #ddd;
}


.deck-container {
    margin: 0 auto;
    display: grid;
    padding: 1rem;
    gap: 1.5em;
    grid-template-columns: repeat(3, 1fr);
}
.card {
    background-color: #fff;
    box-shadow: 0 4px 6px rgb(0, 0, 0, 0.1);
    border-radius: 5px;
    padding: 1.5rem;
}
.term-div, .definition-div {
    text-align: justify;
}
.term-div {
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 700;
    color: #363d55
}
.definition-div {
    margin-top: 1.5rem;
    font-size: 1rem;
    font-weight: 900;
    color: #414a67;
}
.show-hide-btn {
    display: block;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
    background-color:rgb(94, 94, 255);
    color: #fff;
    text-decoration: none;
    padding: 0.7rem 0;
    border-radius: 5px;
}
.show-hide-btn:hover {
    background-color: rgb(75, 75, 255);
}
.show-hide-btn:active {
    background-color: rgb(45, 45, 255);
}


.button-container {
    display: flex;
    justify-content: flex-end;

}
.edit {
   color: rgb(94, 94, 255);
}
.delete {
    color: #ff583b;
}


.hide {
    display: none;
}

.button-container button {
    background-color: transparent;
    padding: 7px;
    font-size: 1.2rem;
    margin-left: 2px;
    margin-bottom: 2px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}
.button-container button:hover {
    background-color: #c7d2fb;
}
.button-container button:active {
    background-color: #d2dbfd;
}



/* responsiveness */
@media (max-width: 1536px){
    .prompt-container {
        width: 90vw;
        font-size: 95%;
    }
}
@media (max-width: 1280px){
    .prompt-container {
        width: 85vw;
    }
}
@media (max-width: 1024px){
    .prompt-container {
        width: 80vw;
    }
}
@media (max-width: 768px){
    .prompt-container {
        width: 75vw;
    }
    .deck-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5em;
    }
}
@media (max-width: 640px){
    .prompt-container {
        width: 72.5vw;
    }
    .deck-container {
        grid-template-columns: 1fr;
        gap: 1.2em;
    }
}
@media (max-width: 475px){
    .prompt-container {
        width: 70vw;
    }
}



/* Theme-specific styles */
/*      dark-mode */
body.dark-mode {
    background-color: #333;
    color: #fff;
}

body.dark-mode #navbar{
    background-color: #282828;
    border-bottom-color: #444;
}
body.dark-mode .container{
    background-color: #444;
}
body.dark-mode .card {
    background-color: #555;
}
body.dark-mode .prompt-container {
    background-color: #444;
}
body.dark-mode .term-div,  body.dark-mode .definition-div {
    color: #fff;
}
body.dark-mode h2 {
    color: #fff;
}
body.dark-mode span {
    color: #a1b3f7;
}

body.dark-mode .nav-link:hover {
    background-color: #fff;
    color: #333;
}
body.dark-mode .logo a,
body.dark-mode .nav-link,
body.dark-mode .theme-toggle {
    color: #fff;
    background-color: #282828;
}
body.dark-mode #lucid-dry {
    fill: #fff;
}

body.dark-mode .theme-toggle:hover {
    color: #d4c4a5;
}
body.dark-mode #lucid-dry:hover {
    fill: #d4c4a5;
}

/*      sepia-mode */
body.sepia-mode {
  background-color: #f4ecd8;
  color: #5a4a42;
}

body.sepia-mode #navbar {
    background-color: #e3d5b8;
    border-bottom-color: #d4c4a5;
}

body.sepia-mode .container{
    background-color: #f4efe5;
}
body.sepia-mode .card {
    background-color: #f1f0ed;
}
body.sepia-mode .prompt-container {
    background-color: #f4efe5;
}
body.sepia-mode h2 {
    color: #5a4a42;
}

body.sepia-mode .nav-link:hover {
    background-color: #5a4a42;
    color: #f4ecd8;
}

body.sepia-mode .logo a, 
body.sepia-mode .nav-link,
body.sepia-mode .theme-toggle {
  color: #5a4a42;
  background-color: #e3d5b8;
}
body.sepia-mode #lucid-dry {
    fill: #5a4a42;
}

body.sepia-mode .theme-toggle:hover {
    color: #a1b3f7;
}
body.sepia-mode #lucid-dry:hover {
    fill: #a1b3f7;
}