/* ************************* */
/*           Reset           */
/* ************************* */

/* Box sizing rules */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* Remove default margin */
body,
h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
    margin: 0;
}

/* Remove list styles on ul, ol elements with a list role, which suggests default styling will be removed */
ul[role='list'],
ol[role='list'] {
    list-style: none;
}

/* Set core root defaults */
html:focus-within {
    scroll-behavior: smooth;
}

/* Set core body defaults */
body {
    min-height: 100vh;
    text-rendering: optimizeSpeed;
    line-height: 1.5;
}

/* A elements that don't have a class get default styles */
a:not([class]) {
    text-decoration-skip-ink: auto;
}

/* Make images easier to work with */
img,
picture {
    max-width: 100%;
    display: block;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
    font: inherit;
}

/* Remove all animations, transitions and smooth scroll for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
    html:focus-within {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ************************* */
/*         Variables         */
/* ************************* */

:root {
    --clr-primary-200: hsl(0, 100%, 50%);
    --clr-primary-400: hsl(172, 67%, 45%);
    --clr-primary-450: hsl(172, 67%, 55%);

    --clr-neutral-000: hsl(0, 0%, 100%);
    --clr-neutral-100: hsl(189, 41%, 97%);
    --clr-neutral-200: hsl(185, 41%, 84%);
    --clr-neutral-400: hsl(184, 14%, 56%);
    --clr-neutral-500: hsl(186, 14%, 43%);
    --clr-neutral-800: hsl(183, 100%, 15%);

    --ff: 'Space Mono', monospace;

    --base-size: 17px;

    /* 3:4 <-> 1.125*/
    --scale-90: calc(var(--base-size)*0.624);
    --scale-100: calc(var(--base-size)*0.702);
    --scale-200: calc(var(--base-size)*0.79);
    --scale-300: calc(var(--base-size)*0.889);
    --scale-400: var(--base-size);
    --scale-500: calc(var(--base-size)*1.125);
    --scale-600: calc(var(--base-size)*1.266);
    --scale-700: calc(var(--base-size)*1.424);
    --scale-800: calc(var(--base-size)*1.602);
    --scale-900: calc(var(--base-size)*1.802);
    --scale-1000: calc(var(--base-size)*2.027);
    --scale-1100: calc(var(--base-size)*2.281);
    --scale-1200: calc(var(--base-size)*2.566);
    --scale-1300: calc(var(--base-size)*2.887);
    --scale-1400: calc(var(--base-size)*3.247);
    --scale-1500: calc(var(--base-size)*3.653);
    --scale-1600: calc(var(--base-size)*4.11);

    /* font size */
    --fs-90: var(--scale-90);
    --fs-100: var(--scale-100);
    --fs-100: var(--scale-100);
    --fs-200: var(--scale-200);
    --fs-300: var(--scale-300);
    --fs-400: var(--scale-400);
    --fs-500: var(--scale-500);
    --fs-600: var(--scale-600);
    --fs-700: var(--scale-700);
    --fs-800: var(--scale-800);
    --fs-900: var(--scale-900);
    --fs-1000: var(--scale-1000);
    --fs-1100: var(--scale-1100);
    --fs-1200: var(--scale-1200);
    --fs-1300: var(--scale-1300);
    --fs-1400: var(--scale-1400);
    --fs-1500: var(--scale-1500);
    --fs-1600: var(--scale-1600);

    /* font weight */
    --fw-700: 700;
}

/* ************************* */
/*        Composition        */
/* ************************* */

body {
    background: var(--clr-neutral-200);
    font-family: var(--ff);
    font-size: var(--fs-400);
    font-weight: var(--fw-700);
    max-width: 60em;

    margin-inline: auto;
}

form {
    background: var(--clr-neutral-000);
    border-top-left-radius: 1.5rem;
    border-top-right-radius: 1.5rem;
    padding: 2rem 1rem;

    display: grid;
    gap: 2rem;
}

ul {
    padding: 0;
    list-style: none;
}

button {
    width: 100%;
    height: 100%;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: none;

    transition: all 100ms ease-out;
}

li button:active,
li button:focus-within {
    background: var(--clr-primary-450);
}

input {
    width: 100%;

    background: var(--clr-neutral-100);
    text-align: right;
    color: var(--clr-neutral-800);
    caret-color: var(--clr-primary-400);
    border: 2px solid transparent;
    outline: 0px solid transparent;

    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
}

input:active,
input:focus-within {
    border-color: var(--clr-primary-400);
}

input::placeholder {
    color: var(--clr-neutral-400);
}

footer {
    margin-top: 4rem;
    text-align: center;
}

/* ************************* */
/*         Utilities         */
/* ************************* */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.fs-x-sm {
    font-size: var(--fs-90);
}

.fs-sm {
    font-size: var(--fs-100);
}

.fs-m {
    font-size: var(--fs-400);
}

.fs-l {
    font-size: var(--fs-600);
}

.fs-x-l {
    font-size: var(--fs-900);
}

.fw-normal {
    font-weight: var(--fw-400);
}

.fw-bold {
    font-weight: var(--fw-700);
}

.clr-n-000 {
    color: var(--clr-neutral-000);
}

.clr-n-100 {
    color: var(--clr-neutral-100);
}

.clr-p-200 {
    color: var(--clr-primary-200);
}

.clr-n-200 {
    color: var(--clr-neutral-200);
}

.clr-p-400 {
    color: var(--clr-primary-400);
}

.clr-n-400 {
    color: var(--clr-neutral-400);
}

.clr-n-500 {
    color: var(--clr-neutral-500);
}

.clr-n-800 {
    color: var(--clr-neutral-800);
}

.bg-clr-p-400 {
    background: var(--clr-primary-400);
}

.bg-clr-n-800 {
    background: var(--clr-neutral-800);
}

.uppercase {
    text-transform: uppercase;
}


/* ************************* */
/*          Blocks           */
/* ************************* */

.logo {
    padding-block: 3rem;

    display: grid;
    place-content: center;
}

.input-data {
    padding: 0.5rem;

    display: grid;
    gap: 2rem;
}

.tips {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: repeat(3, 1fr);
    gap: 1rem;

    margin-bottom: 0;
}

.tips button {
    color: var(--clr-neutral-000);
    background: var(--clr-neutral-800);
}

.tips input::placeholder {
    color: var(--clr-neutral-500);
}

.totals {
    border-radius: 1rem;
    padding: 2.5rem 1.5rem 1.5rem;

    display: grid;
    gap: 2rem;
}

.totals-item {
    display: flex;
    justify-content: space-between;
}

.input-bill {
    position: relative;
}

.input-bill::before {
    content: url(images/icon-dollar.svg);

    display: flex;
    align-items: center;

    line-height: 0;
    height: 100%;

    position: absolute;
    left: 1rem;
}

.input-number-of-people {
    position: relative;
}

.input-number-of-people .warning {
    display: none;
    position: absolute;

    top: -25px;
    right: 0;
}

.input-number-of-people::before {
    content: url(images/icon-person.svg);

    display: flex;
    align-items: center;

    line-height: 0;
    height: 100%;

    position: absolute;
    left: 1rem;
}


/* ************************* */
/*        Exceptions         */
/* ************************* */

.tips button[data-status="selected"] {
    color: var(--clr-neutral-800);
    background: var(--clr-primary-400);
    transform: scale(1.05);
}

.input-number-of-people[data-status="error"] input {
    border-color: var(--clr-primary-200);
}

.input-number-of-people[data-status="error"] .warning {
    display: block;
}


/* Primary Input is a fine pointer device such as a mouse or stylus */
@media (pointer:fine) {

    input,
    button {
        cursor: pointer;
    }

    button:hover {
        color: var(--clr-neutral-800);
        background: var(--clr-primary-450);
    }
}

@media (max-width: 36em) {}

@media (min-width: 36em) and (max-width: 48em) {}

@media (min-width: 48em) and (max-width: 62em) {}

@media (min-width: 62em) {
    /* ************************* */
    /*        Composition        */
    /* ************************* */

    form {
        padding: 2rem;

        grid-template-columns: 1fr 1fr;
        gap: 3rem;

        border-bottom-left-radius: 1.5rem;
        border-bottom-right-radius: 1.5rem;
    }

    /* ************************* */
    /*         Utilities         */
    /* ************************* */

    .fs-x-l {
        font-size: var(--fs-1300);
        line-height: 1;
    }

    /* ************************* */
    /*          Blocks           */
    /* ************************* */

    .input-data {
        padding: 1rem;
    }

    .tips {
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: auto auto;
    }

    .totals {
        padding: 3.5rem 2.5rem 2.5rem;
        gap: 3rem;

        grid-template-rows: min-content min-content 1fr;
    }

    .totals button {
        align-self: flex-start;

        margin-top: auto;
        height: 50%;
    }
}