/* ============================ google fonts ============================ */
@font-face {
  font-family: "Poppins-Regular";
  src: url(../fonts/Poppins/Poppins-Regular.ttf);
}

/* ============================ variables css ============================ */
:root {
  /* ============================  colors ============================ */

  /* color mode */
  --title-color: #f6b01a;
  --subtitle-color: #707070;
  --text-color: #030e20;
  --input-color: #e5e5e5;
  --body-color: #fff;

  /* ============================ font size && typography ============================ */
  --body-font: "Poppins-Regular";

  --title-font-size: 32px;
  --subtitle-font-size: 14px;
  --text-font-size: 16px;

  /* ============================ z index ============================ */
  --z-tooltip: 10;
  --z-fixed: 100;
}

/* ==================== variables dark theme ==================== */
body.dark-theme {
  --title-color: #f6b01a;
  --subtitle-color: #707070;
  --text-color: #e5e5e5;
  --input-color: #030b18;
  --body-color: #030e20;
}

/* ==================== button dark / light ==================== */
.nav-btn {
  display: flex;
  align-items: center;
}
.change-theme {
  color: var(--text-color);
  margin-right: 16px;
  cursor: pointer;
  font-size: 24px;
}
.change-theme:hover {
  color: var(--title-color);
}

/* ============================ base ============================ */
* {
  margin: 0%;
  padding: 0%;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0 0 32px 0;
  font-size: var(--text-font-size);
  background-color: var(--body-color);
  color: var(--text-color);
  font-family: "Poppins-Regular";
}
h1,
h2,
h3,
h4 {
  color: var(--title-color);
  font-weight: 500;
}
ul {
  list-style: none;
}
a {
  text-decoration: none;
}
img {
  max-width: 100%;
  height: auto;
}

/* ============================ reusable css classes ============================ */
.section {
  padding: 32px 0 64px;
}
.section-title {
  font-size: var(--title-font-size);
  text-align: center;
}
.section-subtitle {
  display: block;
  font-size: var(--subtitle-font-size);
  margin-bottom: 3rem;
  text-align: center;
}

/* ============================ layout ============================ */
.container {
  max-width: 768px;
  margin-left: 1.5rem;
  margin-right: 1.5rem;
}
.grid {
  display: grid;
  gap: 1.5rem;
}
.header {
  width: 100%;
  position: fixed;
  bottom: 0;
  left: 0;
  z-index: 100;
  background-color: var(--body-color);
  /* box-shadow: 0px 0px 15px rgba(255, 255, 255, .8); */
}

/* ============================ nav ============================ */
.nav {
  max-width: 968px;
  height: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-logo,
.nav-toggle {
  color: var(--text-color);
}
.nav-logo {
  width: 35px;
  height: 35px;
}
.nav-logo:hover {
  color: var(--title-color);
}
.nav-toggle {
  font-size: var(--subtitle-font-size);
  cursor: pointer;
  font-size: 24px;
}
.nav-toggle:hover {
  color: var(--title-color);
}
.nav-list {
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-color);
}
.nav-link:hover {
  color: var(--title-color);
}
.nav-icon {
  font-size: 20px;
}
.nav-close {
  position: absolute;
  right: 1rem;
  bottom: 0.5rem;
  cursor: pointer;
  color: var(--title-color);
  font-size: 24px;
}
.nav-close:hover {
  color: var(--title-color);
}
/* active link */
.active-link {
  color: var(--title-color);
}

/* change background header */
.scroll-header {
  box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.15);
}
/* show menu */
.show-menu {
  bottom: 0;
}
/* about page */
.main{
  margin: 16px;
  margin-top: 104px;
}
.about_title {
  color: #f6b01a;
  font-size: 27px;
  margin-left: 16px;
  margin-top: 66px;
}
.details {
  color: #f6b01a;
  font-size: 24px;
  margin-left: 16px;
  margin-top: 24px;
}
.about_details {
  width: 45%;
  height: 250px;
  border: 2px solid #f6b01a;
  margin-right: 16px;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: all .3s;
  cursor: pointer;
}
.about_details:hover{
  transform: translateY(-10px);
}
.alldetails {
  margin-top: 24px;
}
.bitcoicon {
  border-radius: 50px;
  width: 60px;
  height: 60px;
  margin-top: 15px;
}
.recommended {
  text-align: center;
  color: var(--subtitle-color);
  font-size: 12px;
    padding-top: 8px;
}
.aboutsite {
  text-align: center;
  color: var(--text-color);
  font-size: 13px;
  padding: 16px;
}
.first {
  display: flex;
  margin-left: 16px;
  margin-bottom: 20px;
}
.overlay-img{
    width: 100%;
    height: 300px;
    display: flex;
    justify-content: center;
    margin-top: 24px;
    transition: all .3s;
    cursor: pointer;
}
.overlay-img:hover{
  transform: translateY(-10px);
}
.overlay-img img{
  border-radius: 15px;
}


/* ==================== footer ==================== */
.footer{
    padding-top: 2rem;
}
.footer-container{
    row-gap: 3.5rem;
}
.footer-bg{
    background-color: #030B18;
    padding: 2rem 0 3rem;
}
.footer .img-logo{
    width: 35px;
    height: 35px;
}
.footer-subtitle{
    font-size: var(--text-font-size);
}
.footer-links{
    display: flex;
    flex-direction: column;
    row-gap: 1.5rem;
}
.footer-link:hover{
    color: var(--title-color);
}
.footer-copy{
    font-size: var(--subtitle-font-size);
    text-align: center;
    color: var(--title-color);
    margin-top: 3rem;
}
.footer-title, .footer-subtitle, .footer-link{
    color: #fff;
}

/* ==================== scroll up ==================== */
.scroll-up{
    position: fixed;
    right: 1rem;
    bottom: -20%;
    background-color: var(--title-color);
    opacity: .8;
    padding: 0 .3rem;
    border-radius: .4rem;
    z-index: 10;
    transition: all .4s;
}
.scroll-up:hover{
    background-color: var(--title-color);
}
.scroll-up-icon{
    font-size: 1.5rem;
    color: #fff;
}

/* show scroll */
.show-scroll{
    bottom: 5rem;
}

/* for Small devices */
@media screen and (max-width: 350px) {
  .container {
    margin-left: 8px;
    margin-right: 8px;
  }
  .nav-menu {
    padding: 2rem 0.25rem 4rem;
  }
  .nav-list {
    column-gap: 0;
  }
  .footer-copy {
    font-size: 10px;
  }

  .first {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .about_details {
    width: 100%;
    height: 190px;
    border: 2px solid #f6b01a;
    margin-bottom: 16px;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all .3s;
    cursor: pointer;
  }
}

/* for medium devices */
@media screen and (min-width: 568px) {
  .recommended {
    text-align: center;
    color: #042a3d;
    font-size: 17px;
  }
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (min-width: 768px) {
  .container {
    margin-left: auto;
    margin-right: auto;
  }
  body {
    margin: 0%;
  }
  .section {
    padding: 6rem 0 2rem;
  }
  .section-subtitle {
    margin-bottom: 4rem;
  }
  .section-subtitle {
    margin-bottom: 4rem;
  }
  .header {
    top: 0;
    bottom: initial;
  }
  .header,
  .main,
  .footer-container {
    padding: 0 1rem;
  }
  .nav {
    height: calc(3rem + 1.5rem);
    column-gap: 1rem;
  }
  .nav-icon,
  .nav-close,
  .nav-toggle {
    display: none;
  }
  .nav-list {
    display: flex;
    column-gap: 2rem;
  }
  .nav-menu {
    margin-left: auto;
  }
  .change-theme {
    margin: 0%;
  }

  .footer-container {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-bg {
    padding: 3rem 0 3.5rem;
  }
  .footer-links {
    flex-direction: row;
    column-gap: 2rem;
  }
  .footer-socials {
    justify-self: flex-end;
  }
  .footer-copy {
    margin-top: 4.5rem;
  }
}

@media screen and (min-width: 768px) {
  .about_title {
    color: #f6b01a;
    font-size: 33px;
    margin-left: 16px;
    margin-top: 66px;
    text-align: center;
  }
  .details {
    color: #f6b01a;
    font-size: 25px;
    margin-left: 16px;
  }
  .bitcoicon {
    border-radius: 50px;
    width: 70px;
    height: 70px;
    margin-top: 15px;
  }
  .recommended {
    text-align: center;
    font-size: 18px;
    color: var(--subtitle-color);
  }
  .aboutsite {
    text-align: center;
    color: var(--subtitle-color);
  }
}
/* for large devices */
@media screen and (min-width: 1024px) {
  .header,
  .main,
  .footer-container {
    padding: 0%;
  }
  .about_title {
    color: #f6b01a;
    font-size: 45px;
    font-weight: 600;
    text-align: center;
    margin-top: 100px;
  }
  .details {
    color: #f6b01a;
    font-size: 30px;
    margin-left: 80px;
    font-weight: 500;
    margin-bottom: 30px;
    margin-top: 30px;
    
  }
  .about_details {
    width: 45%;
    height: 250px;
    border: 2px solid #f6b01a;
    margin-right: 16px;
    border-radius: 20px;
    display: flex;
    margin: auto;
    flex-direction: column;
    align-items: center;
  }
  .bitcoicon {
    border-radius: 50px;
    width: 60px;
    height: 60px;
    margin-top: 15px;
    margin-bottom: 15px;
  }
  .recommended {
    text-align: center;
    color: #f6b01a;
  }
  .aboutsite {
    text-align: center;
    color: rgb(112, 112, 112);
  }
  .alldetails {
    display: flex;
    margin-left: 50px;
    margin-right: 50px;
    margin-bottom: 20px;
  }
}