/* variables */
:root {
    --main-color: #333;
    --bg-color: #fcfcfc;
    --link-color: #007bff;
    --link-hover-color: #0056b3;
    --border-color: #ccc;
    --main-variant-color: #555;
    --bg-variant-color: #ebebeb;
    --bg-variant-lighter-color: #dadada;
    --box-shadow-color: rgba(0, 0, 0, 0.3);
    --primary-color: #4a739f;
    --on-primary-color: #ffffff;
    --primary-outline-color: #7e91ac;
}

@media (prefers-color-scheme: dark) {
    :root {
        --main-color: #eee;
        --bg-color: #222;
        --link-color: #84c1ff;
        --link-hover-color: #c0dfff;
        --border-color: #555;
        --main-variant-color: #ccc;
        --bg-variant-color: #333;
        --bg-variant-lighter-color: #444;
        --primary-color: #c4eaff;
        --on-primary-color: #212121;
        --primary-outline-color: rgb(56, 111, 173);
    }
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
    padding: 0;
    font-size: 100%;
    font-weight: normal;
}

body {
    margin: 0;
    padding: 0;
}

blockquote {
    margin: 0;
    padding: 0;
}

button {
    background: none;
    color: inherit;
    border: none;
    padding: 0;
    font: inherit;
    cursor: pointer;
    outline: none;
}

/* reset input */
input {
    border: none;
    font: inherit;
    outline: none;
    background: none;
    padding: 0;
    margin: 0;
}

/* styles */
h1 {
    font-size: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

h2 {
    font-size: 2rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.8rem;
}

h4 {
    font-size: 1.6rem;
}

h5 {
    font-size: 1.4rem;
}

h6 {
    font-size: 1.2rem;
}

body {
    background-color: var(--bg-color);
    color: var(--main-color);
    margin: 1rem;
    font-family: sans-serif;
}

hr {
    border: 1px solid var(--border-color);
    width: 100%;
}

:focus-visible {
    outline-width: 4px;
    outline-color: var(--primary-outline-color);
    outline-style: solid;
    border-radius: 8px;
    outline-offset: 4px;
}

code {
    font-family: monospace;
    background-color: var(--bg-variant-color);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.8rem;
}

a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    box-sizing: border-box;
    transition: border-bottom-color 0.3s ease, color 0.3s ease;
}

a:hover {
    color: var(--link-hover-color);
    /* text-decoration: underline; */
    border-bottom-color: var(--link-hover-color);
}

blockquote {
    border-left: 0.5rem solid var(--border-color);
    padding: 0.5rem 1rem;
    background-color: var(--bg-variant-color);
    border-radius: 0 8px 8px 0;
}

div.card,
a.card {
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem;
    display: inline-flex;
}

a.card {
    border-bottom: initial;
    color: unset;
    box-sizing: initial;
    transition: unset;
}

a.card:hover {
    border-bottom-color: initial;
    color: unset;
}

div.card.elevated,
a.card.elevated {
    background-color: var(--bg-variant-color);
    box-shadow: 0 4px 8px var(--box-shadow-color);
    transition: background-color 0.3s ease;
}

a.card.elevated:hover {
    background-color: var(--bg-color);
}

div.card.filled,
a.card.filled {
    background-color: var(--bg-variant-color);
    transition: box-shadow 0.3s ease;
}

a.card.filled:hover {
    box-shadow: 0 4px 8px var(--box-shadow-color);
}

a.card.outlined {
    transition: background-color 0.3s ease;
}

div.card.outlined,
a.card.outlined:not(:focus-visible) {
    outline: 2px solid var(--border-color);
}

a.card.outlined:hover {
    background-color: var(--bg-variant-color);
}

button,
a.button {
    border-bottom: initial;
    box-sizing: initial;
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--on-primary-color);
    margin: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 16px;
    cursor: pointer;
    transform: scale(1);
    transition: border-radius 0.3s ease, transform 0.1s ease;
    text-decoration: none;
}

button:hover,
a.button:hover {
    border-bottom-color: initial;
    border-radius: 8px;
    text-decoration: none;
}

button:focus,
a.button:focus {
    border-radius: 8px;
    text-decoration: none;
}

button:active,
a.button:active,
button:focus-visible,
a.button:focus-visible {
    transform: scale(1.1);
}

button.elevated,
a.button.elevated {
    background-color: var(--bg-variant-color);
    color: var(--main-color);
    box-shadow: 0 4px 4px var(--box-shadow-color);
}

button.outlined,
a.button.outlined {
    background: transparent;
    border: 1px solid var(--primary-outline-color);
    color: var(--main-color);
}

button.text,
a.button.text {
    background: transparent;
    color: var(--primary-color);
    transition: background-color 0.3s ease, border-radius 0.3s ease,
        transform 0.1s ease;
}

button.text:hover,
a.button.text:hover {
    background-color: rgb(from var(--primary-color) r g b / 10%);
}

button .button-icon,
a.button .button-icon {
    vertical-align: middle;
    display: inline-block;
    font-family: 'Material Symbols Rounded';
    font-size: 1.5em;
    margin-right: 0.5rem;
}

details {
    border-left: 0.25rem solid transparent;
    box-sizing: border-box;
    transition: border-left-color 0.3s ease;
}

details[open] {
    border-left-color: var(--border-color);
}

details summary {
    cursor: pointer;
    transition: background-color 0.3s ease, border-top-left-radius 0.3s ease,
        border-bottom-left-radius 0.3s ease;
    padding: 0.5rem;
    border-radius: 8px;
}

details[open] > summary {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

details > summary::marker {
    content: none;
}

details > summary::before {
    background-color: var(--primary-color);
    mask-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px"><path d="M507-480 384-357l56 57 180-180-180-180-56 57 123 123ZM480-80q-83 0-156-31.5T197-197q-54-54-85.5-127T80-480q0-83 31.5-156T197-763q54-54 127-85.5T480-880q83 0 156 31.5T763-763q54 54 85.5 127T880-480q0 83-31.5 156T763-197q-54 54-127 85.5T480-80Zm0-80q134 0 227-93t93-227q0-134-93-227t-227-93q-134 0-227 93t-93 227q0 134 93 227t227 93Zm0-320Z"/></svg>');
    font-size: 1.5em;

    display: inline-block;
    content: '';
    width: 1em;
    height: 1em;
    margin-right: 0.5rem;
    mask-size: cover;
    mask-repeat: no-repeat;
    mask-position: center;
    vertical-align: top;

    transition: transform 0.3s ease;
    margin-right: 0.5rem;
}

details[open] > summary::before {
    transform: rotate(450deg);
}

details summary:hover {
    background-color: var(--bg-variant-color);
}

details summary:active {
    background-color: initial;
}

details > *:not(summary) {
    margin-left: 1rem;
    margin-right: 1rem;
    margin-bottom: 1rem;
}

img {
    max-width: 100%;
    border-radius: 8px;
}

input[type='text'],
textarea,
select {
    padding: 0.5rem;
    border-radius: 16px;
    font-size: 1rem;
    color: var(--main-color);
    background-color: var(--bg-variant-lighter-color);
    border: 4px solid transparent;
    box-sizing: border-box;
    transition: border-color 0.3s ease, border-radius 0.3s ease;
    font-family: inherit;
    margin: 0.5rem;
}

select {
    cursor: pointer;
}

select:hover {
    border-radius: 8px;
}

input[type='text']::placeholder,
textarea::placeholder {
    color: var(--main-variant-color);
}

input[type='text']:focus,
textarea:focus,
select:focus {
    border-color: var(--primary-outline-color);
    border-radius: 8px;
}

input[type='text']:focus:focus-visible,
textarea:focus:focus-visible,
select:focus:focus-visible {
    outline: none;
}