/*=============== BASE ===============*/
:root {
  /* Colors */
  --primary-color: #00A7E1; /* A vibrant, professional blue */
  --primary-color-alt: #008fbf;
  --bg-color: #121212; /* A true dark background */
  --bg-color-alt: #1E1E1E; /* For cards and surfaces */
  --text-color: #E0E0E0; /* Off-white for readability */
  --text-color-light: #A0A0A0;
  --title-color: #FFFFFF;
  --border-color: #333333;

  /* Fonts */
  --body-font: 'Inter', sans-serif;
  --title-font: 'Poppins', sans-serif;
  
  /* Font sizes */
  --h1-font-size: 2.5rem;
  --h2-font-size: 2rem;
  --h3-font-size: 1.25rem;
  --normal-font-size: 1rem;
  --small-font-size: 0.875rem;
}

/* Responsive typography */
@media screen and (max-width: 992px) {
  :root {
    --h1-font-size: 2rem;
    --h2-font-size: 1.5rem;
    --h3-font-size: 1.15rem;
    --normal-font-size: 0.938rem;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  background-color: var(--bg-color);
  color: var(--text-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  color: var(--title-color);
  font-family: var(--title-font);
  font-weight: 600;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: color 0.3s;
}

a:hover {
  color: var(--primary-color-alt);
}

img {
  max-width: 100%;
  height: auto;
}

/*=============== REUSABLE CSS CLASSES ===============*/
.container {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 1.5rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.section {
  padding: 6rem 0 2rem;
}

.section__title {
  font-size: var(--h2-font-size);
  margin-bottom: 2rem;
  text-align: center;
}

.section__subtitle {
  display: block;
  text-align: center;
  color: var(--primary-color);
  font-size: var(--small-font-size);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

/* Animation for scroll reveal */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}


/*=============== HEADER & NAV ===============*/
.header {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  background-color: rgba(18, 18, 18, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.nav {
  height: 4.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  color: var(--title-color);
  font-family: var(--title-font);
  font-weight: 700;
  font-size: 1.5rem;
}
.nav__logo:hover{
    color: var(--primary-color);
}

.nav__list {
  display: flex;
  gap: 2rem;
}

.nav__link {
  color: var(--text-color);
  font-weight: 500;
  position: relative;
  transition: color 0.3s;
}

.nav__link:hover {
  color: var(--primary-color);
}
.nav__link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-color);
  transition: width 0.3s;
}

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle, .nav__close {
  font-size: 1.5rem;
  color: var(--title-color);
  cursor: pointer;
  display: none;
}

/* Mobile Navigation */
@media screen and (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100%;
    background-color: var(--bg-color-alt);
    padding: 6rem 2rem 0;
    transition: right 0.4s ease-in-out;
    box-shadow: -2px 0 10px rgba(0,0,0,0.2);
  }
  .nav__menu.show-menu {
    right: 0;
  }
  .nav__list {
    flex-direction: column;
    gap: 2.5rem;
  }
  .nav__close {
    display: block;
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
  }
  .nav__toggle {
    display: block;
  }
}


/*=============== BUTTONS ===============*/
.button {
  display: inline-block;
  padding: 0.9rem 1.8rem;
  border-radius: 0.5rem;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}
.button--primary {
  background-color: var(--primary-color);
  color: #fff;
}
.button--primary:hover {
    background-color: var(--primary-color-alt);
    color: #fff;
    transform: translateY(-3px);
}
.button--ghost {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}
.button--ghost:hover {
    background-color: var(--primary-color);
    color: #fff;
}
.button i {
    vertical-align: middle;
    margin-left: 0.25rem;
}
.button--small {
    padding: 0.6rem 1.2rem;
    font-size: var(--small-font-size);
}

/*=============== HOME ===============*/
.home__container {
  padding-top: 4rem;
  grid-template-columns: 1fr;
  align-items: center;
  text-align: center;
}
.home__content {
    justify-self: center;
}
.home__greeting {
  font-size: var(--normal-font-size);
  color: var(--text-color-light);
}
.home__name {
  font-size: var(--h1-font-size);
  margin: 0.5rem 0;
}
.home__profession {
  font-size: var(--h3-font-size);
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}
.home__description {
  max-width: 600px;
  margin: 0 auto 2.5rem;
}
.home__buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
}
.home__social {
    position: absolute;
    top: 50%;
    left: 1.5rem;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.home__social-link {
    font-size: 1.5rem;
    color: var(--text-color-light);
}
.home__social-link:hover {
    color: var(--primary-color);
}
@media screen and (max-width: 768px) {
    .home__social {
        display: none;
    }
    .home__container {
        padding-top: 2rem;
    }
}


/*=============== ABOUT ===============*/
.about__container {
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
    gap: 3rem;
}
.about__img {
    width: 350px;
    border-radius: 1rem;
    justify-self: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.about__description {
    margin-bottom: 2rem;
    line-height: 1.6;
}
.about__stats {
    display: flex;
    gap: 2rem;
}
.about__stat-number {
    font-size: var(--h2-font-size);
    font-weight: 700;
    color: var(--primary-color);
    font-family: var(--title-font);
}
.about__stat-text {
    display: block;
    font-size: var(--small-font-size);
    color: var(--text-color-light);
}

@media screen and (max-width: 992px) {
    .about__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .about__image-container {
        order: -1;
        margin-bottom: 2rem;
    }
    .about__img {
        width: 280px;
    }
    .about__stats {
        justify-content: center;
    }
}

/*=============== SKILLS ===============*/
.skills__container {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.skills__card {
    background-color: var(--bg-color-alt);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: transform 0.3s, box-shadow 0.3s;
}
.skills__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 167, 225, 0.1);
}
.skills__title {
    font-size: var(--h3-font-size);
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}
.skills__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.skills__tags span {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: var(--small-font-size);
    border: 1px solid var(--border-color);
}

/*=============== PORTFOLIO ===============*/
.portfolio__container {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}
.portfolio__card {
    background-color: var(--bg-color-alt);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: transform 0.3s, box-shadow 0.3s;
}
.portfolio__card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.portfolio__img {
    width: 100%;
    object-fit: cover;
}
.portfolio__data {
    padding: 1.5rem;
}
.portfolio__title {
    font-size: var(--h3-font-size);
    margin-bottom: 0.5rem;
}
.portfolio__description {
    margin-bottom: 1.5rem;
    color: var(--text-color-light);
}

/*=============== EXPERIENCE ===============*/
.experience__container {
    display: grid;
    gap: 2rem;
    max-width: 700px;
    margin: 0 auto;
}
.experience__item {
    background-color: var(--bg-color-alt);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border-left: 3px solid var(--primary-color);
}
.experience__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.experience__title {
    font-size: var(--h3-font-size);
}
.experience__date {
    font-size: var(--small-font-size);
    color: var(--text-color-light);
    font-weight: 500;
}
.experience__description {
    line-height: 1.6;
    color: var(--text-color-light);
}

/*=============== CERTIFICATIONS ===============*/
.certs__container {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}
.certs__card {
    background-color: var(--bg-color-alt);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
}
.certs__logo {
    width: 60px;
    height: 60px;
    margin-bottom: 1rem;
}
.certs__title {
    font-size: var(--h3-font-size);
    margin-bottom: 0.25rem;
}
.certs__issuer {
    font-size: var(--small-font-size);
    color: var(--text-color-light);
}

/*=============== CONTACT ===============*/
.contact__container {
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    align-items: flex-start;
}
.contact__title-alt {
    font-size: var(--h2-font-size);
    margin-bottom: 1rem;
}
.contact__description {
    line-height: 1.6;
    margin-bottom: 2rem;
    color: var(--text-color-light);
}
.contact__info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.contact__info-icon {
    font-size: 2rem;
    color: var(--primary-color);
}
.contact__info-title {
    font-size: var(--normal-font-size);
    margin-bottom: 0.25rem;
}
.contact__info-link {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
}
.contact__info-link:hover {
    color: var(--primary-color);
}

@media screen and (max-width: 992px) {
    .contact__container {
        grid-template-columns: 1fr;
    }
}

/*=============== FOOTER ===============*/
.footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
}
.footer__container {
    text-align: center;
}
.footer__copy {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
}