:root {
    --primary: #37352f;
    --secondary: #46433d;
    --dark-theme-bg: #141414;
}

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

button {
    outline: none;
    border: none;
}

.dark-theme {
    filter: invert(1) hue-rotate(180deg);
    background-color: var(--dark-theme-bg);
}

.dark-theme #dark-theme-btn {
    filter: invert(1) hue-rotate(180deg);
}

body {
    font-family: "Roboto", sans-serif;
    margin: 2em auto;
    width: 85%;
}

body:not(.before-load) {
    transition: background-color 0.5s ease;
}

.page-title {
    font-size: 2.75rem;
}

.section h2 {
    font-size: 2rem;
}

.sub-section h3 {
    font-size: 1.5rem;
}

.sub-section h3,
.section h2,
.page-title {
    color: var(--primary);
    font-weight: 500;
}

.section p,
.sub-section p {
    color: var(--secondary);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6rem;
}

#dark-theme-btn {
    float: right;
    font-size: 2rem;
    background-color: transparent;
    cursor: pointer;
}