/* base */
:root {
    /* font-size: 19px; */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Roboto", sans-serif;
}

.serif {
    font-family: "Roboto Slab", serif;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

/* colors */
.bg-dark {
    background: var(--black);
}

.bg-light {
    background: var(--white);
}

.bg-primary {
    background: var(--primary);
}

.bg-secondary {
    background: var(--secondary);
}

.txt-dark {
    color: var(--black);
}

.txt-light {
    color: var(--white);
}

.txt-primary {
    color: var(--primary);
}

.txt-secondary {
    color: var(--secondary);
}

/* border */
.border {
    border: 1px solid var(--black);
}

.border-light {
    border: 1px solid var(--white);
}

.border-primary {
    border: 1px solid var(--primary);
}

/* shadows */
.box-shadow {
    box-shadow: 0 10px 10px 10px var(--black);
}

.box-shadow-light {
    box-shadow: 0 10px 10px 10px var(--white);
}

.box-shadow-primary {
    box-shadow: 0 10px 10px 10px var(--primary);
}

.box-shadow-sm {
    box-shadow: 0 2px 5px 5px var(--black);
}

.box-shadow-sm-light {
    box-shadow: 0 2px 5px 5px var(--white);
}

.box-shadow-sm-primary {
    box-shadow: 0 2px 5px 5px var(--primary);
}

.txt-shadow:hover {
    text-shadow: 0 0 15px var(--black);
}

.txt-shadow-light:hover {
    text-shadow: 0 0 15px var(--white);
}

.txt-shadow-primary:hover {
    text-shadow: 0 0 15px var(--primary);
}

/* container */
.container {
    max-width: 750px;
    margin: 0 auto;
}

/* height */
.h-25 {
    height: 25%;
}
.h-50 {
    height: 50%;
}
.h-75 {
    height: 75%;
}
.h-100 {
    height: 100%;
}
.vh-25 {
    height: 25vh;
}
.vh-50 {
    height: 50vh;
}
.vh-75 {
    height: 75vh;
}
.vh-100 {
    height: 100vh;
}

/* width */
.w-25 {
    width: 25%;
}
.w-50 {
    width: 50%;
}
.w-75 {
    width: 75%;
}
.w-100 {
    width: 100%;
}
.vw-25 {
    width: 25vw;
}
.vw-50 {
    width: 50vw;
}
.vw-75 {
    width: 75vw;
}
.vw-100 {
    width: 100vw;
}

/* margin */
.m-1 {
    margin: 0.25rem;
}
.m-2 {
    margin: 0.5rem;
}
.m-3 {
    margin: 0.75rem;
}
.m-4 {
    margin: 1rem;
}
.m-5 {
    margin: 1.25rem;
}
.m-6 {
    margin: 1.5rem;
}
.m-7 {
    margin: 1.75rem;
}
.m-8 {
    margin: 2rem;
}

.mt-1 {
    margin-top: 0.25rem;
}
.mt-2 {
    margin-top: 0.5rem;
}
.mt-3 {
    margin-top: 0.75rem;
}
.mt-4 {
    margin-top: 1rem;
}
.mt-5 {
    margin-top: 1.25rem;
}
.mt-6 {
    margin-top: 1.5rem;
}
.mt-7 {
    margin-top: 1.75rem;
}
.mt-8 {
    margin-top: 2rem;
}

.mb-1 {
    margin-bottom: 0.25rem;
}
.mb-2 {
    margin-bottom: 0.5rem;
}
.mb-3 {
    margin-bottom: 0.75rem;
}
.mb-4 {
    margin-bottom: 1rem;
}
.mb-5 {
    margin-bottom: 1.25rem;
}
.mb-6 {
    margin-bottom: 1.5rem;
}
.mb-7 {
    margin-bottom: 1.75rem;
}
.mb-8 {
    margin-bottom: 2rem;
}

.mr-1 {
    margin-right: 0.25rem;
}
.mr-2 {
    margin-right: 0.5rem;
}
.mr-3 {
    margin-right: 0.75rem;
}
.mr-4 {
    margin-right: 1rem;
}
.mr-5 {
    margin-right: 1.25rem;
}
.mr-6 {
    margin-right: 1.5rem;
}
.mr-7 {
    margin-right: 1.75rem;
}
.mr-8 {
    margin-right: 2rem;
}

.ml-1 {
    margin-left: 0.25rem;
}
.ml-2 {
    margin-left: 0.5rem;
}
.ml-3 {
    margin-left: 0.75rem;
}
.ml-4 {
    margin-left: 1rem;
}
.ml-5 {
    margin-left: 1.25rem;
}
.ml-6 {
    margin-left: 1.5rem;
}
.ml-7 {
    margin-left: 1.75rem;
}
.ml-8 {
    margin-left: 2rem;
}

.mx-1 {
    margin: 0 0.25rem;
}
.mx-2 {
    margin: 0 0.5rem;
}
.mx-3 {
    margin: 0 0.75rem;
}
.mx-4 {
    margin: 0 1rem;
}
.mx-5 {
    margin: 0 1.25rem;
}
.mx-6 {
    margin: 0 1.5rem;
}
.mx-7 {
    margin: 0 1.75rem;
}
.mx-8 {
    margin: 0 2rem;
}

.my-1 {
    margin: 0.25rem 0;
}
.my-2 {
    margin: 0.5rem 0;
}
.my-3 {
    margin: 0.75rem 0;
}
.my-4 {
    margin: 1rem 0;
}
.my-5 {
    margin: 1.25rem 0;
}
.my-6 {
    margin: 1.5rem 0;
}
.my-7 {
    margin: 1.75rem 0;
}
.my-8 {
    margin: 2rem 0;
}

/* padding */
.p-1 {
    padding: 0.25rem;
}
.p-2 {
    padding: 0.5rem;
}
.p-3 {
    padding: 0.75rem;
}
.p-4 {
    padding: 1rem;
}
.p-5 {
    padding: 1.25rem;
}
.p-6 {
    padding: 1.5rem;
}
.p-7 {
    padding: 1.75rem;
}
.p-8 {
    padding: 2rem;
}

.pt-1 {
    padding-top: 0.25rem;
}
.pt-2 {
    padding-top: 0.5rem;
}
.pt-3 {
    padding-top: 0.75rem;
}
.pt-4 {
    padding-top: 1rem;
}
.pt-5 {
    padding-top: 1.25rem;
}
.pt-6 {
    padding-top: 1.5rem;
}
.pt-7 {
    padding-top: 1.75rem;
}
.pt-8 {
    padding-top: 2rem;
}

.pb-1 {
    padding-bottom: 0.25rem;
}
.pb-2 {
    padding-bottom: 0.5rem;
}
.pb-3 {
    padding-bottom: 0.75rem;
}
.pb-4 {
    padding-bottom: 1rem;
}
.pb-5 {
    padding-bottom: 1.25rem;
}
.pb-6 {
    padding-bottom: 1.5rem;
}
.pb-7 {
    padding-bottom: 1.75rem;
}
.pb-8 {
    padding-bottom: 2rem;
}

.pr-1 {
    padding-right: 0.25rem;
}
.pr-2 {
    padding-right: 0.5rem;
}
.pr-3 {
    padding-right: 0.75rem;
}
.pr-4 {
    padding-right: 1rem;
}
.pr-5 {
    padding-right: 1.25rem;
}
.pr-6 {
    padding-right: 1.5rem;
}
.pr-7 {
    padding-right: 1.75rem;
}
.pr-8 {
    padding-right: 2rem;
}

.pl-1 {
    padding-left: 0.25rem;
}
.pl-2 {
    padding-left: 0.5rem;
}
.pl-3 {
    padding-left: 0.75rem;
}
.pl-4 {
    padding-left: 1rem;
}
.pl-5 {
    padding-left: 1.25rem;
}
.pl-6 {
    padding-left: 1.5rem;
}
.pl-7 {
    padding-left: 1.75rem;
}
.pl-8 {
    padding-left: 2rem;
}

.px-1 {
    padding: 0 0.25rem;
}
.px-2 {
    padding: 0 0.5rem;
}
.px-3 {
    padding: 0 0.75rem;
}
.px-4 {
    padding: 0 1rem;
}
.px-5 {
    padding: 0 1.25rem;
}
.px-6 {
    padding: 0 1.5rem;
}
.px-7 {
    padding: 0 1.75rem;
}
.px-8 {
    padding: 0 2rem;
}

.py-1 {
    padding: 0.25rem 0;
}
.py-2 {
    padding: 0.5rem 0;
}
.py-3 {
    padding: 0.75rem 0;
}
.py-4 {
    padding: 1rem 0;
}
.py-5 {
    padding: 1.25rem 0;
}
.py-6 {
    padding: 1.5rem 0;
}
.py-7 {
    padding: 1.75rem 0;
}
.py-8 {
    padding: 2rem 0;
}

/* text alignment */
.txt-center {
    text-align: center;
}

.txt-justify {
    text-align: justify;
}

.txt-left {
    text-align: left;
}

.txt-right {
    text-align: right;
}

/* text sizes */
.fs-sm {
    font-size: 0.9rem;
}

.fs-1 {
    font-size: 1.25rem;
}

.fs-2 {
    font-size: 1.5rem;
}

.fs-3 {
    font-size: 1.75rem;
}

.fs-4 {
    font-size: 2rem;
}

.fs-5 {
    font-size: 2.25rem;
}

.fs-6 {
    font-size: 2.5rem;
}

.fs-6 {
    font-size: 2.75rem;
}

.fs-7 {
    font-size: 3rem;
}

.fs-8 {
    font-size: 3.25rem;
}

.fs-9 {
    font-size: 3.5rem;
}

.fs-10 {
    font-size: 3.75rem;
}

/* flex */
.d-flex {
    display: flex;
}

/* flex direction */
.flex-column {
    flex-direction: column;
}

.flex-row {
    flex-direction: row;
}

/* justify content */
.justify-center {
    justify-content: center;
}

.justify-start {
    justify-content: flex-start;
}

.justify-end {
    justify-content: flex-end;
}

.justify-around {
    justify-content: space-around;
}

.justify-between {
    justify-content: space-between;
}

/* align items */
.align-center {
    align-items: center;
}

.align-start {
    align-items: flex-start;
}

.align-end {
    align-items: flex-end;
}

/* align self */
.align-self-start {
    align-self: flex-start;
}

.align-self-end {
    align-self: flex-end;
}

.align-self-center {
    align-self: center;
}

/* align content */
.align-content-center {
    align-content: center;
}

.align-content-start {
    align-content: flex-start;
}

.align-content-end {
    align-content: flex-end;
}

.align-content-around {
    align-content: space-around;
}

.align-content-between {
    align-content: space-between;
}