.light-theme {
  /*=============== light theme colors  ===============*/

  --background-primary: hsl(0, 0%, 100%);
  --background-secondary: hsl(210, 100%, 98%);

  --action-primary: hsl(213, 49%, 89%);
  --action-secondary: hsl(210, 56%, 94%);

  --foreground-primary: hsl(218, 24%, 18%);
  --foreground-secondary: hsl(216, 12%, 47%);
  --foreground-tertiary: hsl(214, 22%, 70%);

  --accent: hsl(229, 94%, 62%);
}

.dark-theme {
  /*=============== dark theme colors  ===============*/
  --background-primary: hsl(218, 23%, 23%);
  --background-secondary: hsl(220, 26%, 14%);

  --action-primary: hsl(216, 15%, 52%);
  --action-secondary: hsl(218, 23%, 23%);

  --foreground-primary: hsl(210, 38%, 95%);
  --foreground-secondary: hsl(211, 25%, 84%);
  --foreground-tertiary: hsl(214, 20%, 69%);

  --accent: hsl(229, 94%, 62%);
}

:root {
  /*========== Colors ==========*/
  --white: hsl(0, 0%, 100%);

  /*========== Font and typography ==========*/
  --fs-base: 0.85rem !important;
  --fs-1: 1.875rem !important;
  --fs-2: 1.5rem !important;
  --fs-3: 1.25rem !important;
  --fs-4: 0.875rem !important;
  --fs-5: 0.75rem !important;

  /*========== spacing ==========*/
  --py: 5rem !important;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  text-decoration: none !important;
}

a {
  text-decoration: none;
}

li {
  list-style: none;
}

img {
  max-width: 100%;
}

img,
button {
  display: block;
}

a,
span {
  display: inline-block;
}

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

html {
  font-family: "Inter", sans-serif;
  font-size: var(--fs-base); /* base font-size (0.85rem = 13.6px) */
  line-height: 1.8;
}

:focus {
  outline-offset: 4px;
}

/*=============== scrollbar style ===============*/

::-webkit-scrollbar {
  width: 16px;
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 20px;
  border: 4px solid;
}

.light-theme::-webkit-scrollbar-thumb {
  border-color: hsl(0, 0%, 90%);
}

.dark-theme::-webkit-scrollbar-thumb {
  border-color: hsl(219, 27%, 20%);
}

.light-theme::-webkit-scrollbar-track {
  background: hsl(0, 0%, 90%);
}

.dark-theme::-webkit-scrollbar-track {
  background: hsl(219, 27%, 20%);
}

/*=============== BASE ===============*/
.h1,.h2,.h3,.h4 {
  display: block;
  color: var(--foreground-primary) !important;
}
.h1 {
  font-size: var(--fs-1);
  font-weight: 900 !important;
}
.h2 {
  font-size: var(--fs-2);
  font-weight: 700 !important;
}
.h3 {
  font-size: var(--fs-3);
  font-weight: 700 !important;
}
.h4 {
  font-size: var(--fs-4);
  font-weight: 700 !important;
}

.text-sm {
  font-size: var(--fs-4);
}

.text-tiny {
  font-size: var(--fs-5);
}

.container {
  padding: 0 15px !important;
  margin-inline: auto !important;
  margin: auto !important;
}

header {
  background: var(--background-primary);
}

header .flex-wrapper {
  display: none;
}

.btn-style {
  min-width: 10rem;
  border-radius: 100px;
  text-align: center;
  transition: all 0.2s ease-in;
}

.btn-primary-style {
  background: var(--accent);
  color: var(--white);
  padding: 0.8rem 1.2rem;
}

.btn-primary-style:hover {
  background: var(--foreground-secondary);
  color: var(--action-primary);
}

.btn-secondary-style {
  background: var(--action-secondary);
  color: var(--foreground-secondary);
  padding: 0.8rem 1.2rem;
  border: 3px solid var(--foreground-tertiary);
}

.btn-secondary-style:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/*=============== Extra style for dark theme ===============*/

.dark-theme .btn-primary-style:hover {
  color: var(--background-primary);
}

.dark-theme .blog-topic {
  background: var(--action-primary);
  color: var(--foreground-secondary);
}

.dark-theme .blog-topic:hover {
  background: var(--foreground-primary);
  color: var(--action-primary);
}

.dark-theme .load-more:hover {
  color: var(--white);
}

.dark-theme .aside .h2 {
  color: var(--foreground-primary);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  padding: 15px 0;
}

.logo {
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--foreground-primary);
}

.logo span {
  color: var(--accent);
}

header .btn-group {
  display: flex;
  align-items: center;
  gap: 15px;
}

.theme-btn-mobile,
.nav-menu-btn,
.nav-close-btn {
  background: var(--action-secondary);
  color: var(--foreground-tertiary);
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-content: center;
  border-radius: 50%;
  font-size: 25px;
  transition: all 0.2s ease-in;
}

:is(.theme-btn-mobile,.nav-menu-btn,.nav-close-btn):hover {
  background: var(--accent);
  color: var(--white);
}

.theme-btn-mobile i {
  display: none;
}

.theme-btn-mobile.light .fa-sun,
.theme-btn-mobile.dark .fa-moon {
  display: block;
}

.mobile-nav {
  position: fixed;
  inset: 0;
  background-color: var(--background-primary);
  padding: 70px 20px;
  overflow: auto;
  overscroll-behavior: contain;
  transform: translate(100%);
  visibility: hidden;
  transition: .5s cubic-bezier(1,0,0.3,0.7);
  z-index: 2;
}

.mobile-nav.active {
  transform: translate(0);
  visibility: visible;
}

.nav-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
}

.mobile-nav .wrapper {
  padding-bottom: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--action-primary);
}

.mobeli-nav .nav-title {
  margin-bottom: 1.5rem;
}

.mobile-nav .nav-item {
  margin-bottom: 0.5rem;
}

.mobile-nav .nav-link {
  font-size: var(--fs-3);
  color: var(--foreground-secondary);
  transition: all 0.2s;
}

.mobile-nav .nav-link:hover {
  color: var(--accent) !important;
}

/*=============== HERO SECTION ===============*/

.hero {
  background: var(--background-primary);
  padding-top: 2rem;
  padding-bottom: var(--py);
  text-align: center;
}

.hero .h1 {
  margin-bottom: 1rem;
  line-height: 1.6;
}

.hero b {
  color: var(--accent);
  font-weight: inherit;
}

.hero .h3 {
  color: var(--foreground-secondary);
  margin-bottom: 2rem;
}

.hero .btn-group {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
}

.hero .right {
  display: none;
}

/*=============== BLOG ===============*/
.main {
  background: var(--background-secondary);
  padding: var(--py) 0;
}

.blog .h2 {
  line-height: 1.3;
  margin-bottom: 3rem;
  text-align: center;
}

.blog-card-group {
  margin-bottom: 3rem;
}

.blog-card {
  background: var(--background-primary);
  padding: 10px;
  margin-bottom: 1rem;
  border-radius: 10px;
  box-shadow: 0px 0px 18px rgba(0, 0, 0, 0.2);
  transition: 0.25s ease;
}

.blog-card:hover {
  transform: translateY(-3px);
  box-shadow: 0px 0px 18px rgba(0, 0, 0, 0.3);
}

.blog-card-banner img {
  width: 100%;
}

.blog-content-wrapper {
  padding: 10px 5px;
}

.blog-topic {
  background: var(--action-primary);
  color: var(--foreground-secondary);
  font-weight: 600;
  padding: 0.25rem 1rem;
  border-radius: 5px;
  margin-bottom: 1rem;
  transition: all 0.2s;
}

.blog-topic:hover {
  background: var(--foreground-secondary);
  color: var(--action-primary);
}

.blog-card .h3 {
  line-height: 1.4;
  margin-bottom: 1rem;
  transition: all 0.2s;
}

.blog-card .h3:hover {
  text-decoration: underline !important;
  text-decoration-thickness: 2px !important;
}

.blog-text,
.profile-wrapper {
  display: none;
}

.blog .wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.blog .h4 {
  color: var(--foreground-secondary);
  font-size: var(--fs-4);
}

.blog .h4:hover {
  color: var(--accent);
}

.blog .text-sm {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--foreground-tertiary);
}

.blog .separator {
  background: var(--foreground-tertiary);
  margin-inline: 3px;
  margin: 0 3px;
  height: 3px;
  border-radius: 3px; 
}

.load-more {
  margin: auto;
  background: var(--foreground-secondary);
  color: var(--background-secondary);
  padding: 0.6rem 1.2rem;
  transition: all 0.2s;
}

.load-more:hover {
  background: var(--accent);
}

.aside {
  display: none;
}

/*=============== FOOTER ===============*/
footer {
  background: var(--background-primary);
}

footer .container {
  padding: var(--py) 15px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

footer .wrapper {
  text-align: center;
  margin: 0;
}

.footer-text {
  color: var(--foreground-secondary);
  max-width: 300px;
  margin: auto;
}

.footer-title {
  color: var(--foreground-primary);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

footer ul {
  padding: 0 !important;
}

.footer-link {
  color: var(--foreground-secondary);
}

.footer-link:hover {
  color: var(--accent);
}

.copyright {
  color: var(--foreground-secondary);
  font-size: var(--fs-4);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 1rem;
  border-top: 1px solid var(--action-primary);
}

.copyright a {
  color: var(--accent);
  font-weight: 500;
}

.copyright a:hover {
  text-decoration: underline !important;
}

footer .wrapper .logo {
  margin: 15px 0 8px 0 ;
}