@font-face {
    font-family: yekan;
    src: url("../fonts/iranyekanwebbold.ttf") format("truetype");
  }
  
:root {
--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: linear-gradient(90deg, var(--white_10) 0px 77%, var(--white_50) 92%, transparent);

--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;


--section-padding: 100px;

--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);

--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);

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

/* RESET */

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

li {
  list-style: none;
}

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

a,
img,
svg,
span,
button {
  display: block;
}

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

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;
}

/* more codes */

.container {
  padding-inline: 15px;
}

.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);
}

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

.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;
}

.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);
}

.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: 6px 15px 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;
  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%;
  height: 100%;
}

.hero {
  padding-block: 120px 140px;
}

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

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

.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);
  padding: 20px;
  box-shadow: var(--shadow-2);
  margin-block-start: -160px;
  border-radius: var(--radius-12);
}

.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: flex;
  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);
}

.badge {
  color: var(--white);
  font-size: var(--fs-8);
  font-weight: var(--fw-700);
  padding: 5px 8px 4px 8px;
  border-radius: 50px;
  margin-block: 10px;
}

.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);
}

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

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

.market .btn-link {
  position: relative;
  font-weight: var(--fw-700);
  min-width: max-content;
  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: 9px 24px 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 .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;
}

.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);
}

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

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

.instruction .section-title {
  margin-block-end: 5px;
}

.section-title {
  text-align: center;
  margin-top: 5rem;
}

.market .section-title {
  margin-block: auto;
  margin-right: auto;

}

.instruction-list {
  display: grid;
  gap: 30px;
  margin-block: 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: 6px 15px;
}

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

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

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

.about-content .section-title {
  text-align: start;
}

.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;
}

.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;
  box-shadow: 0px 0px 20px rgba(255, 255, 255, 0.2);
}

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

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

.footer-list-title {
  color: var(--white);
  font-weight: var(--fw-700);
  font-size: var(--fs-7);
  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;
  align-items: center;
  gap: 20px;
}

.social-link {
  font-size: 20px;
  transition: var(--transition-1);
}

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


/* responsive */

@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;
  }

  .about-content .section-title {
    text-align: start;
  }

  .app-content .section-title {
    text-align: start;
  }
}

@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('../images/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;
  }

  .header.active {
    top: -70px;
  }
}


@media (min-width: 992px) {

  .container {
    max-width: 990px;
  }

  .header{
    padding-block: 5px;
  }

  .header.active {
    top: -85px;
  }

  .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;
  }
}

@media (min-width: 1200px) {
  :root {
    --fs-1: 6.4rem;
    --fs-2: 4.8rem;

  }

  .container {
    max-width: 1500px;
  }

  .header.active {
    top: -65px;
  }

  .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: 50px;
  }

  .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;
  }
}