/*<----- Custom Property -----> */

:root {

    /* Colors */

    --cadet-blue-crayola: hsl(227, 13%, 73%);
    --maximum-yellow-red: hsl(41, 95%, 61%);
    --medium-sea-green: hsl(142, 43%, 54%);
    --blue-crayola_10: hsla(222, 100%, 61%, 0.05);
    --smocky-black_30: hsla(0, 0%, 6%, 0.3);
    --eerie-black-1: hsl(240, 5%, 8%);
    --eerie-black-2: hsl(228, 9%, 10%);
    --raisin-black: hsl(225, 15%, 16%);
    --blue-crayola: hsl(222, 100%, 61%);
    --roman-silver: hsl(223, 10%, 52%);
    --presian-red: hsl(0, 64%, 52%);
    --gunmetal_50: hsla(230, 16%, 22%, 0.5);
    --gainsboro: hsl(0, 0%, 85%);
    --cultured: hsl(0, 0%, 93%);
    --white_50: hsla(0, 0%, 100%, 0.5);
    --white_30: hsla(0, 0%, 100%, 0.3);
    --white_10: hsla(0, 0%, 100%, 0.1);
    --black_10: hsla(0, 0%, 0%, 0.1);
    --white: hsl(0, 0%, 100%);

    /* Gradient Color */

    --gradient: linear-gradient(90deg, var(--white_10) 0px 77%, var(--white_50) 92%, transparent);

    /* Typography */

    --ff-dm-sans: 'DM Sans', sans-serif;

    --fs-1: 3.2rem;
    --fs-2: 3rem;
    --fs-3: 2.4rem;
    --fs-4: 2rem;
    --fs-5: 1.8rem;
    --fs-6: 1.5rem;
    --fs-7: 1.4rem;
    --fs-8: 1.2rem;

    --fw-500: 500;
    --fw-700: 700;

    /* Spacing */

    --section-padding: 100px;

    /* Shadow */

    --shadow-1: 0px 4px 8px var(--black_10);
    --shadow-2: 0px 30px 10px -20px var(--smocky-black_30);
    --shadow-3: 0px 15px 10px -20px var(--smocky-black_30);

    /* Radius */

    --radius-12: 12px;
    --radius-24: 24px;

    /* Transition */

    --transition-1: 0.25s ease;
    --transition-2: 0.5s ease;
    --transition-3: 1s ease;
    --cubic-out: cubic-bezier(0.33, 0.85, 0.4, 0.96);

}

/* <------ Reset ------> */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

li {
    list-style: none;
}

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

a,
img,
svg,
data,
span,
button,
ion-icon {
    display: block;
}

img {
    height: auto;
}

button {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
}

ion-icon {
    pointer-events: none;
}

address {
    font-style: normal;
}

table {
    border-collapse: collapse;
}

html {
    font-family: var(--ff-dm-sans);
    font-size: 10px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--eerie-black-2);
    color: var(--cadet-blue-crayola);
    font-size: 1.6rem;
    line-height: 1.4;
}

body.active {
    overflow: hidden;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background-color: hsl(220, 4%, 5%);
}

::-webkit-scrollbar-thumb {
    background-color: hsl(220, 5%, 20%);
}

::-webkit-scrollbar-thumb:hover {
    background-color: hsl(220, 5%, 30%);
}

:focus-visible {
    outline-offset: 4px;
}

/* <------ Reused Styles ------> */

.container {
    padding-inline: 15px;
}

.btn {
    color: var(--white);
    border-radius: 50px;
}

.btn-outline {
    font-size: var(--fs-6);
    font-weight: var(--fw-500);
    border: 1px solid var(--white);
    padding: 5px 15px;
    transition: var(--transition-1);
}

.btn-outline:is(:hover, :focus) {
    background-color: var(--blue-crayola);
    border-color: var(--blue-crayola);
}

.btn-primary {
    position: relative;
    background-color: var(--blue-crayola);
    max-width: max-content;
    font-weight: var(--fw-700);
    padding: 13px 30px;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: -50px;
    background-image: var(--gradient);
    transform: translateX(-100%);
    opacity: 0;
    z-index: -1;
    transition: var(--transition-2);
}

.btn-primary:is(:hover, :focus)::after {
    transform: translateX(0);
    opacity: 1;
}

.section {
    padding-block: var(--section-padding);
}

[data-section]>* {
    transform: translateY(50px);
    opacity: 0;
    transition: var(--transition-3);
}

[data-section].active>* {
    opacity: 1;
    transform: translateY(0);
}

.h1,
.h2,
.h3 {
    color: var(--white);
    line-height: 1.1;
}

.h1 {
    font-size: var(--fs-1);
}

.h2 {
    font-size: var(--fs-2);
}

.h3 {
    font-size: var(--fs-3);
}

.w-100 {
    width: 100%;
}

.badge {
    color: var(--white);
    font-size: var(--fs-8);
    font-weight: var(--fw-700);
    padding: 4px 8px;
    border-radius: 50px;
}

.badge.red {
    background-color: var(--presian-red);
}

.badge.green {
    background-color: var(--medium-sea-green);
}

.last-update.red {
    color: var(--presian-red);
}

.last-update.green {
    color: var(--medium-sea-green);
}

.section-text {
    font-size: var(--fs-5);
    margin-block: 15px 35px;
}

.section-list {
    margin-block-end: 35px;
}

.section-item:not(:last-child) {
    margin-block-end: 25px;
}

.section-item .title-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-block-end: 15px;
}

.section-item .title-wrapper ion-icon {
    flex-shrink: 0;
    color: var(--blue-crayola);
    font-size: 24px;
}


/* <------ Header ------> */

.header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--eerie-black-1);
    padding-block: 15px;
    z-index: 4;
}

.header.active {
    position: fixed;
    top: -66px;
    background-color: var(--white);
    border-block-start: 1px solid var(--cultured);
    box-shadow: var(--shadow-1);
    animation: slideIn 0.25s var(--cubic-out) forwards;
}

@keyframes slideIn {

    0% {
        transform: translateY(0);
        background-color: var(--white);
    }

    100% {
        transform: translateY(100%);
        background-color: var(--eerie-black-2);
    }

}

.header>.container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.logo {
    color: var(--white);
    font-size: 2.5rem;
    font-weight: var(--fw-700);
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-toggle-btn .line {
    width: 26px;
    height: 3px;
    background-color: var(--white);
    transition: var(--transition-1);
}

.nav-toggle-btn .line:not(:last-child) {
    margin-block-end: 4px;
}

.nav-toggle-btn {
    padding: 8px 5px;
    margin-inline-start: auto;
}

.nav-toggle-btn.active .line-1 {
    transform: rotate(45deg) translate(5px, 6px);
}

.nav-toggle-btn.active .line-2 {
    opacity: 0;
}

.nav-toggle-btn.active .line-3 {
    transform: rotate(-45deg) translate(4px, -5px);
}

.navbar {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--eerie-black-1);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: 0.25s var(--cubic-out);
}

.navbar.active {
    max-height: calc(100vh - 63px);
    visibility: visible;
    transition-duration: 0.5s;
}

.navbar-item:not(:last-child) {
    border-block-end: 1px solid var(--white_30);
}

.navbar-link {
    color: var(--white);
    font-weight: var(--fw-700);
    padding: 12px 30px;
    transition: var(--transition-1);
}

.navbar-link:is(:hover, :focus, .active) {
    color: var(--blue-crayola);
}

/* ===== Hero ===== */
.hero {
    padding-block: 150px 140px;
}

.hero-content {
    margin-block-end: 80px;
}

.hero-text {
    font-size: var(--fs-5);
    margin-block: 25px 40px;
}

/* ===== Trend ===== */
.trend {
    background-color: var(--eerie-black-1);
    padding-block-end: 0;
}

.trend-tab {
    background-color: var(--eerie-black-2);
    border: 1px solid var(--raisin-black);
    border-radius: var(--radius-24);
    padding: 20px;
    box-shadow: var(--shadow-2);
    margin-block-start: -160px;
}

.trend-tab .tab-nav {
    display: flex;
    flex-wrap: wrap;
    padding-block-end: 20px;
    margin-block-end: 20px;
    border-block-end: 1px solid var(--raisin-black);
}

.trend-tab .tab-btn {
    color: var(--white);
    font-size: var(--fs-7);
    font-weight: var(--fw-700);
    padding: 7px 15px;
    border-radius: 50px;
    transition: var(--transition-1);
}

.trend-tab .tab-btn.active {
    background-color: var(--blue-crayola);
}

.trend-tab .tab-content {
    display: grid;
    gap: 20px;
}

.trend-card {
    padding: 20px;
    border-radius: var(--radius-12);
    transition: var(--transition-1);
}

.trend-card:is(:hover, .active) {
    background-color: var(--gunmetal_50);
    box-shadow: var(--shadow-3);
}

.trend-card .card-title-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.trend-card .card-title {
    color: var(--white);
    font-size: var(--fs-7);
    font-weight: var(--fw-700);
    transition: var(--transition-1);
}

.trend-card .card-title:is(:hover, :focus) {
    color: var(--blue-crayola);
}

.trend-card .card-title .span {
    color: var(--cadet-blue-crayola);
    display: inline-block;
    margin-inline-start: 5px;
}

.trend-card .card-value {
    color: var(--white);
    font-size: var(--fs-3);
    font-weight: var(--fw-700);
    margin-block: 10px;
}

.trend-card .card-analytics {
    display: flex;
    align-items: center;
    gap: 8px;
}

.trend-card .current-price {
    font-size: var(--fs-7);
}

/* =====  Market  ===== */
.market {
    background-color: var(--eerie-black-1);
    color: var(--white);
}

.market .title-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-block-end: 25px;
}

.market .btn-link {
    position: relative;
    min-width: max-content;
    font-weight: var(--fw-700);
    transition: var(--transition-1);
}

.market .btn-link:is(:hover, :focus) {
    color: var(--blue-crayola);
}

.market .btn-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--raisin-black);
    transition: var(--transition-1);
}

.market .btn-link:is(:hover, :focus)::after {
    background-color: var(--blue-crayola);
}

.market-tab {
    overflow-x: auto;
    padding-block-end: 30px;
}

.market-tab::-webkit-scrollbar {
    height: 14px;
}

.market-tab::-webkit-scrollbar-thumb {
    border: 2px solid hsl(220, 4%, 5%);
    border-width: 2px 10px;
}

.market-tab .tab-nav {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-block-end: 40px;
}

.market-tab .tab-btn {
    min-width: max-content;
    color: var(--white);
    font-size: var(--fs-7);
    font-weight: var(--fw-700);
    padding: 7px 24px;
    border-radius: 50px;
}

.market-tab .tab-btn.active {
    background-color: var(--blue-crayola);
}

.market-table {
    width: 100%;
}

.table-heading,
.table-data {
    padding: 8px;
}

.table-heading {
    font-size: var(--fs-5);
    text-align: left;
    white-space: nowrap;
}

.market-table .table-head {
    border-block-end: 2px solid var(--white);
}

.table-row:not(.table-title) {
    height: 90px;
}

.market-table .table-row {
    font-size: var(--fs-5);
    border-block-end: 1px solid var(--raisin-black);
    transition: var(--transition-1);
}

.market-table .table-body .table-row:is(:hover, :focus-within) {
    background-color: var(--blue-crayola_10);
}

.market-table .add-to-fav {
    color: var(--cadet-blue-crayola);
    font-size: 18px;
}

.market-table .add-to-fav.active .icon-outline,
.market-table .add-to-fav .icon-fill {
    display: none;
}

.market-table .add-to-fav .icon-outline,
.market-table .add-to-fav.active .icon-fill {
    display: block;
}

.market-table .add-to-fav.active ion-icon {
    color: var(--maximum-yellow-red);
}

.market-table .wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: max-content;
}

.market-table .coin-name {
    font-size: var(--fs-5);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-1);
}

.market-table .coin-name .span {
    color: var(--roman-silver);
    font-size: var(--fs-7);
}

.market-table .coin-name:is(:hover, :focus) {
    color: var(--blue-crayola);
}

.market-table :is(.rank, .last-price, .market-cap) {
    font-weight: var(--fw-700);
}

.market-table .btn-outline {
    border-width: 2px;
    padding-inline: 10px;
}

.market-table .table-row:is(:hover, :focus-within) .btn-outline {
    background-color: var(--blue-crayola);
    border-color: var(--blue-crayola);
}

/*====== Instruction ======*/

.instruction :is(.section-title, .section-text) {
    text-align: center;
}

.instruction .section-title {
    margin-block-end: 15px;
}

.instruction-list {
    display: grid;
    gap: 30px;
    margin-block-start: 50px;
}

.instruction-card {
    text-align: center;
}

.instruction-card .card-banner {
    transition: var(--transition-2);
}

.instruction-card:hover .card-banner {
    transform: rotateY(1turn);
}

.instruction-card .img {
    margin-inline: auto;
    margin-block-end: 12px;
}

.instruction-card .card-subtitle {
    font-size: var(--fs-8);
    font-weight: var(--fw-700);
    text-transform: uppercase;
}

.instruction-card .card-title {
    font-size: var(--fs-4);
    margin-block: 5px 15px;
}

.instruction-card .card-text {
    padding-inline: 20px;
}

/*====== About ======*/

.about {
    background-color: var(--eerie-black-1);
}

.about-banner {
    margin-block-end: 40px;
}


/*====== App ======*/
.app {
    overflow: hidden;
    padding-block-end: 0;
}

.app-wrapper {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 15px;
}

.app-banner {
    position: relative;
    margin-block-start: 60px;
}

.app-banner .span {
    position: absolute;
    top: 10%;
    left: 0;
    color: var(--white);
    font-size: var(--fs-7);
    font-weight: var(--fw-700);
    padding: 8px 15px;
    border: 2px solid var(--white);
    border-radius: 50px;
}


/*====== Footer ======*/

.footer-top {
    background-color: var(--eerie-black-1);
    padding-block: 80px 50px;
}

.footer-top .container {
    display: grid;
    gap: 50px;
}

.footer .logo {
    font-size: 3rem;
}

.footer-title {
    color: var(--white);
    font-size: var(--fs-3);
    margin-block: 25px 20px;
}

.footer-contact-link:not(:last-child) {
    margin-block-end: 12px;
}

address.footer-contact-link {
    max-width: 30ch;
}

.footer-list-title {
    color: var(--white);
    font-size: var(--fs-7);
    font-weight: var(--fw-700);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-list>li:not(:last-child) {
    margin-block-end: 10px;
}

.footer-list>li:first-child {
    margin-block-end: 20px;
}

.footer-link {
    color: var(--gainsboro);
    transition: var(--transition-1);
}

.footer-link:is(:hover, :focus) {
    color: var(--blue-crayola);
}

.footer-bottom {
    background-color: var(--eerie-black-2);
    padding-block: 20px;
}

.copyright {
    text-align: center;
    margin-block-end: 20px;
}

.copyright-link {
    display: inline-block;
    color: var(--blue-crayola);
}

.social-list {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-link {
    font-size: 18px;
    transition: var(--transition-1);
}

.social-link:is(:hover, :focus) {
    color: var(--blue-crayola);
}

/*====== Media Queries ======*/

/* responsive for larger than 575px screen */

@media (min-width: 575px) {
    :root {
        --fs-1: 4rem;
        --fs-2: 3.4rem;

    }

    .container {
        max-width: 540px;
        width: 100%;
        margin-inline: auto;
    }

    .hero-text {
        --fs-5: 2rem;
    }
}


/* responsive for larger than 768px screen */

@media (min-width: 768px) {
    :root {
        --fs-1: 5rem;
        --fs-2: 4rem;
    }

    .container {
        max-width: 750px;
    }

    .hero-banner {
        max-width: max-content;
        margin-inline: auto;
    }

    .trend-tab .tab-content {
        grid-template-columns: 1fr 1fr;
    }

    .instruction {
        overflow: hidden;
    }

    .instruction .section-text {
        max-width: 40ch;
        margin-inline: auto;
    }

    .instruction-list {
        grid-template-columns: 1fr 1fr;
    }

    .instruction-card {
        position: relative;
    }

    .instruction-card::after {
        content: "";
        width: 160px;
        height: 12px;
        background-image: url('../img/connect-line.png');
        background-repeat: no-repeat;
        background-size: contain;
        background-position: center;
        position: absolute;
        top: 50px;
        right: -95px;
    }

    .instruction-list>li:nth-child(even) .instruction-card::after {
        display: none;
    }

    .app-banner {
        max-width: max-content;
    }

    .footer-top .container {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-brand {
        grid-column: 1 / 3;
    }

    .footer-bottom .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .copyright {
        margin-block-end: 0;
    }
}


/* responsive for larger than 992px screen */

@media (min-width: 992px) {
    .container {
        max-width: 960px;
    }

    .header {
        padding-block: 5px;
    }

    .header.active {
        top: -60px;
    }

    .header>.container {
        gap: 50px;
    }

    .nav-toggle-btn {
        display: none;
    }

    .navbar,
    .navbar.active {
        all: unset;
        margin-inline-end: auto;
    }

    .navbar-list {
        display: flex;
        align-items: center;
    }

    .navbar-item:not(:last-child) {
        border-block-end: none;
    }

    .navbar-link {
        font-size: var(--fs-7);
        padding: 15px 12px;
    }

    .navbar-link:is(:hover, :focus, .active) {
        background-color: var(--blue-crayola);
        color: var(--white);
    }

    .hero .container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        align-items: center;
        gap: 30px;
    }

    .hero-content {
        margin-block-end: 0;
    }

    .market-tab {
        padding-block-end: 0;
    }

    .about .container {
        display: grid;
        grid-template-columns: 1fr 0.8fr;
        align-items: center;
        gap: 30px;
    }

    .about-banner {
        margin-block-end: 0;
    }

    .app {
        padding-block: 0;
    }

    .app .container {
        display: grid;
        grid-template-columns: 0.8fr 1fr;
        align-items: flex-end;
        gap: 30px;
    }

    .app-banner {
        margin-block-start: 0;
    }

    .app-content {
        margin-block: 50px;
    }

}


/* responsive for larger than 1200px screen */

@media (min-width: 1200px) {

    :root {
        --fs-1: 6.4rem;
        --fs-2: 4.8rem;
    }

    .container {
        max-width: 1280px;
    }

    .header.active {
        top: -64px;
    }

    .navbar-link {
        font-size: unset;
    }

    .hero .container {
        gap: 100px;
    }

    .trend-tab .tab-content {
        grid-template-columns: repeat(4, 1fr);
    }

    .instruction-list {
        grid-template-columns: repeat(4, 1fr);
    }

    .instruction-list>li:nth-child(even) .instruction-card::after {
        display: block;
    }

    .instruction-list>li:last-child .instruction-card::after {
        display: none;
    }

    :is(.about, .app) .container {
        gap: 60px;
    }

    .app-content {
        margin-block: 100px;
    }

    .footer-top {
        padding-block: 100px 90px;
    }

    .footer-top .container {
        grid-template-columns: 1fr 0.5fr 0.5fr 0.5fr 0.5fr;
    }

    .footer-brand {
        grid-column: auto;
    }

}