/* Copyright 2025 sreeshankar.github.io

This file is a part of
https://github.com/sreeshankark/sreeshankark.github.io

Author: Sreeshankar K (https://github.com/sreeshankark) */

* {
  padding: 0;
  margin: 0;
  font-family: 'Poppins', sans-serif;
  box-sizing: border-box;
}

:root {
  --main-color-light: rgb(161, 0, 0);
  --main-color-dark: rgb(0, 221, 255);
  --bg-color-light: white;
  --bg-color-dark: black;
  --text-color-light: black;
  --text-color-dark: white;
}

@media (prefers-color-scheme: light) {
  :root {
    background-color: var(--bg-color-light);
    color: var(--text-color-light);
    --main-color: var(--main-color-light);
    --p-color: rgb(92, 92, 92);
  }

  nav ul li a::after {
    background-color: var(--text-color-light);
  }

  .about-col-1 img {
    border-color: var(--text-color-light);
  }

  .layer,
  form input,
  form textarea {
    background: linear-gradient(rgba(0, 0, 0, 0.1));
  }

  .layer a {
    background-color: var(--text-color-dark);
  }

  form input,
  form textarea {
    color: var(--text-color-light);
  }

  .btn {
    color: var(--text-color-dark);
  }

  .btn:hover {
    border-color: var(--text-color-light);
    background: var(--text-color-light);
  }

  nav.active {
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
    background-color: var(--bg-color-light) !important;
  }

  #sent {
    color: rgb(23, 151, 0);
  }

  @media only screen and (max-width: 600px) {
    nav ul {
      background: var(--bg-color-light);
      color: var(--main-color-light);
    }

  }
}

@media (prefers-color-scheme: dark) {
  :root {
    background-color: var(--bg-color-dark);
    color: var(--text-color-dark);
    --main-color: var(--main-color-dark);
    --p-color: rgb(179, 179, 179);
  }

  nav ul li a::after {
    background-color: var(--text-color-dark);
  }

  .about-col-1 img {
    border-color: var(--text-color-dark);
  }

  .layer,
  form input,
  form textarea {
    background: linear-gradient(rgba(255, 255, 255, 0.1));
  }

  .layer a {
    background-color: var(--text-color-light);
  }

  form input,
  form textarea {
    color: var(--text-color-dark);
  }

  .btn {
    color: var(--text-color-light);
  }

  .btn:hover {
    border-color: var(--text-color-dark);
    background: var(--text-color-dark);
  }

  nav.active {
    box-shadow: 0px 4px 10px rgba(255, 255, 255, 0.2);
    background-color: var(--bg-color-dark) !important;
  }

  #sent {
    color: rgb(38, 255, 0);
  }

  @media only screen and (max-width: 600px) {
    nav ul {
      background: var(--bg-color-dark);
      color: var(--main-color-dark);
    }

  }
}

html {
  scroll-behavior: smooth;
}

span {
  color: var(--main-color);
}

/* Navbar */
.logo {
  font-size: 25px;
  display: flex;
}

nav {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  top: 0;
  left: 0;
  width: 100%;
  height: 10vh;
  padding: 10px 10%;
  align-items: center;
  z-index: 1000;
  position: fixed;
  transition: background-color 0.1s ease-in-out;
}

nav ul li {
  display: inline;
  margin: 10px 20px;
  list-style: none;
}

nav ul li a {
  color: var(--color);
  text-decoration: none;
  font-size: 22px;
  position: relative;
}

nav ul li a:hover {
  color: var(--main-color);
  transition: color 0.5s ease-in-out;
}

nav ul li a::after {
  content: '';
  width: 0%;
  height: 3px;
  position: absolute;
  left: 0;
  bottom: -6px;
  transition: 0.5s;
}

nav ul li a:hover::after {
  width: 100%;
}

/* Home Section  */
#home {
  width: 100%;
  height: 100vh;
  background-image: url(res/images/bg.png);
  background-position: center;
  background-size: cover;
}

.container {
  padding: 10px 10%;
}

.home-text {
  margin-top: 20%;
  font-size: 40px;
}

.home-text h1 {
  font-size: 80px;
  font-weight: 700;
}

.home-text h2 {
  margin-top: 20px;
  font-weight: 300;
}

.home-text h3 {
  margin-top: 20px;
  font-weight: 100;
  color: var(--p-color);
}

/* About Section */
#about {
  padding: 100px 0;
  color: var(--color);
}

.row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.about-col-1 {
  flex-basis: 25%;
}

.about-col-1 img {
  width: 100%;
  border-radius: 15px;
  border-width: 2px;
  border-style: solid;
}

.about-col-2 {
  flex-basis: 70%;
}

.sub-title {
  font-size: 50px;
  font-weight: 600;
  color: var(--color);
}

.about-col-2 p {
  font-size: 22px;
  margin-top: 10px;
  line-height: 1.5;
  text-align: justify;
  text-justify: inter-word;
  color: var(--p-color);
}

.tab-title {
  display: flex;
}

.tab {
  position: relative;
  font-size: 50px;
  font-weight: 600;
  margin-right: 50px;
  cursor: pointer;
  color: var(--color) !important;
}

.tab::after {
  content: '';
  width: 0;
  height: 3px;
  position: absolute;
  background-color: var(--main-color);
  left: 0;
  bottom: -6px;
  transition: 0.5s;
}

.tab.active-tab::after {
  width: 50%;
}

.tab-content ul li {
  list-style: none;
  color: var(--p-color);
  margin: 20px 0 0;
}

.tab-content ul li span {
  font-size: 22px;
}

.tab-content {
  display: none;
}

.tab-content.active-content {
  display: block;
}

.split {
  display: flex;
  justify-content: space-between;
  gap: 40px;
}

.left-list,
.right-list {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 55%;
}

.left-list li,
.right-list li {
  font-size: 18px;
  margin-bottom: 15px;
}

#portfolio {
  padding: 100px 0;
  color: var(--color);
}

.work-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  grid-gap: 40px;
  margin-top: 50px;
  line-height: 1.5;
  color: var(--text-color);
}

.work-list span {
  font-size: 30px;
  font-weight: 500;
}

.work {
  border-radius: 15px;
  position: relative;
  overflow: hidden;
}

.work img {
  width: 100%;
  display: block;
  border-radius: 15px;
  opacity: 0.5;
  transition: transform 0.5s;
}

.work:hover img {
  transform: scale(1.1)
}

.work:hover .layer {
  height: 100%;
}

.layer {
  height: 0;
  width: 100%;
  position: absolute;
  left: 0;
  bottom: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 0 40px;
  text-align: center;
  font-size: 20px;
  border-radius: 15px;
  transition: height 0.5s;
}

.layer h3 {
  font-weight: 100;
  margin-bottom: 20px;
}

.layer a {
  margin-top: 20px;
  color: var(--main-color);
  text-decoration: none;
  font-size: 20px;
  line-height: 60px;
  width: 60px;
  height: 60px;
  text-align: center;
  border-radius: 50%;
  border-width: 2px;
  border-style: solid;
  cursor: pointer;
}

/* Contact */
#contact {
  padding: 100px 0;
}

.contact-left {
  flex-basis: 35%;
}

.contact-left p {
  margin-top: 20px;
}

.contact-left p i {
  color: var(--main-color);
  margin-right: 15px;
  font-size: 25px;
}

.social {
  margin-top: 30px;
}

.social a {
  text-decoration: none;
  font-size: 30px;
  margin-right: 15px;
  color: var(--p-color);
  display: inline-block;
  transition: transform 0.5s;
  cursor: pointer;
}

.social a:hover {
  color: var(--main-color);
  transform: translateY(-5px);
}

.btn {
  display: inline-block;
  font-size: 18px;
  margin: 50px auto;
  width: fit-content;
  border-width: 2px;
  border-style: solid;
  border-color: var(--main-color);
  padding: 14px 50px;
  border-radius: 6px;
  text-decoration: none;
  background: var(--main-color);
  cursor: pointer;
  transition: background 0.5s, border-color 0.5s;
}

.contact-right {
  flex-basis: 60%;
}

.contact-right form {
  width: 100%;
}

form input,
form textarea {
  width: 100%;
  border: 0;
  outline: none;
  padding: 15px;
  margin-bottom: 15px;
  font-size: 18px;
  border-radius: 6px;
}

.field {
  color: var(--main-color);
}

form .btn2 {
  padding: 14px 60px;
}

#sent {
  margin-top: -40px;
  font-size: 12px;
  transition: opacity 0.5s ease-in-out;
  display: block;
}

.copyright {
  width: 100%;
  text-align: center;
  padding: 25px 0;
  color: var(--color);
  font-size: 20px;
  opacity: 0.7;
  font-weight: 300;
  margin-top: 20px;
}

/* Background aurora effect */
.aurora-container {
  position: fixed;
  width: auto;
  height: auto;
  border-radius: 16rem 32rem 64rem 128rem;
  top: 0;
  left: 0;
  z-index: -1;
}

.aurora {
  position: absolute;
  width: 30vw;
  height: 120vh;
  border-radius: 16rem 32rem 64rem 128rem;
  background: linear-gradient(90deg, rgba(0, 255, 170, 1.0), rgba(255, 0, 150, 0.5), rgba(50, 100, 255, 1.0));
  filter: blur(100px);
  transition: transform 10s ease-out;
}

nav .fa-solid {
  display: none;
}

@media only screen and (max-width: 600px) {
  .logo {
    font-size: 15px;
    ;
    margin-top: 10px;
  }

  .container {
    padding: 10px 6%;
  }

  #home {
    background-image: url(res/images/bg-mobile.png);
  }

  .home-text {
    font-size: 22px;
    margin: 20px 0;
    margin-top: 30%;
  }

  .home-text h1 {
    font-size: 30px;
  }

  .home-text h2 {
    font-size: 20px;
    margin-top: 10px;
  }

  nav {
    padding: 10px 6%;
    height: 8vh;
  }

  nav .fa-solid {
    display: block;
    font-size: 20px;
    margin-top: 10px;
    ;
  }

  nav ul {
    position: fixed;
    top: 0;
    color: var(--background-color);
    right: -200px;
    width: 200px;
    height: 100vh;
    padding-top: 50px;
    z-index: 2;
    transition: right 0.5s;
  }

  nav ul li {
    display: block;
    margin: 25px;
  }

  nav ul li a {
    font-size: 20px;
  }

  nav ul .fa-solid {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 20px;
    cursor: pointer;
  }

  .sub-title {
    font-size: 30px;
  }

  .about-col-1,
  .about-col-2 {
    flex-basis: 100%;
  }

  .about-col-1 img {
    width: 60%;
    margin-bottom: 20px;
  }

  .about-col-2 p {
    font-size: 14px;
  }

  .tab {
    font-size: 16px;
    margin-right: 25px;
  }

  .tab-content ul li {
    font-size: 14px;
  }

  .tab-content ul li span {
    font-size: 14px;
  }

  .layer {
    padding: 0;
    font-size: 15px;
  }

  .layer h3 span {
    font-size: 20px;
    line-height: 1;
    margin-top: -10px;
  }

  .layer p {
    margin-top: -15px;
  }

  .layer a {
    width: 30px;
    height: 30px;
    margin-top: 10px;
    margin-bottom: 5px;
    border-width: 2px;
    line-height: 30px;
    font-size: 15px;
  }

  .contact-left,
  .contact-right {
    flex-basis: 100%;
  }

  .contact-left p i {
    color: var(--main-color);
    margin-right: 10px;
    font-size: 20px;
  }

  .social {
    margin-top: 30px;
  }

  .social a {
    text-decoration: none;
    font-size: 29.6px;
    margin-right: 15px;
    color: var(--p-color);
    display: inline-block;
    transition: transform 0.5s;
    cursor: pointer;
  }

  .social a:hover {
    color: var(--main-color);
    transform: translateY(-5px);
  }

  .btn {
    font-size: 15px;
    padding: 10px 25px;
  }

  form input,
  form textarea {
    font-size: 15px;
  }

  form .btn2 {
    padding: 10px 30px;
  }

  .copyright {
    font-size: 15px;
  }
}