/*=============== VARIABLES CSS ===============*/
:root {
  --header-height: 3.5rem;

  /* Colors */
  --hue: 220;
  --first-color: hsl(var(--hue), 85%, 56%);
  --first-color-alt: hsl(var(--hue), 85%, 48%);
  --first-color-light: hsl(var(--hue), 85%, 90%);
  --title-color: hsl(var(--hue), 16%, 16%);
  --text-color: hsl(var(--hue), 10%, 45%);
  --body-color: hsl(var(--hue), 50%, 98%);
  --container-color: #ffffff;
  --card-color: #ffffff;
  --border-color: hsl(var(--hue), 16%, 90%);
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.08);

  /* Typography */
  --body-font: 'Poppins', sans-serif;
  --biggest-font-size: 2.25rem;
  --h1-font-size: 1.65rem;
  --h2-font-size: 1.3rem;
  --h3-font-size: 1.05rem;
  --normal-font-size: 0.938rem;
  --small-font-size: 0.813rem;
  --smaller-font-size: 0.75rem;

  /* Font Weight */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semi-bold: 600;
  --font-bold: 700;

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

/* Responsive Typography */
@media screen and (min-width: 968px) {
  :root {
    --biggest-font-size: 3.25rem;
    --h1-font-size: 2.25rem;
    --h2-font-size: 1.6rem;
    --h3-font-size: 1.25rem;
    --normal-font-size: 1rem;
    --small-font-size: 0.875rem;
    --smaller-font-size: 0.813rem;
  }
}

/* Variables Dark Theme */
body.dark-theme {
  --title-color: hsl(var(--hue), 15%, 95%);
  --text-color: hsl(var(--hue), 10%, 75%);
  --body-color: hsl(var(--hue), 30%, 8%);
  --container-color: hsl(var(--hue), 26%, 12%);
  --card-color: hsl(var(--hue), 24%, 14%);
  --border-color: hsl(var(--hue), 20%, 20%);
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
}

/*=============== BASE ===============*/
* {
  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(--body-color);
  color: var(--text-color);
  transition: background-color 0.4s, color 0.4s;
}

h1, h2, h3, h4 {
  color: var(--title-color);
  font-weight: var(--font-semi-bold);
}

ul {
  list-style: none;
}

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

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

button, input, textarea {
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  outline: none;
  border: none;
}

/*=============== REUSABLE CSS CLASSES ===============*/
.container {
  max-width: 1040px;
  margin-left: 1.5rem;
  margin-right: 1.5rem;
}

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

.section {
  padding: 4.5rem 0 2rem;
}

.section__title {
  font-size: var(--h1-font-size);
  text-align: center;
  margin-bottom: 0.25rem;
}

.section__subtitle {
  display: block;
  font-size: var(--small-font-size);
  color: var(--first-color);
  text-align: center;
  margin-bottom: 2.75rem;
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.main {
  overflow: hidden;
}

/*=============== HEADER & NAV ===============*/
.header {
  width: 100%;
  background-color: var(--body-color);
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-fixed);
  transition: box-shadow 0.4s, background-color 0.4s;
}

.nav {
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  color: var(--title-color);
  font-weight: var(--font-bold);
  font-size: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.3s;
}

.nav__logo span {
  color: var(--first-color);
}

.nav__actions {
  display: flex;
  align-items: center;
  column-gap: 1rem;
}

.change-theme {
  font-size: 1.25rem;
  color: var(--title-color);
  cursor: pointer;
  transition: color 0.3s, transform 0.3s;
}

.change-theme:hover {
  color: var(--first-color);
  transform: rotate(15deg);
}

.nav__toggle {
  font-size: 1.35rem;
  color: var(--title-color);
  cursor: pointer;
  display: flex;
}

@media screen and (max-width: 767px) {
  .nav__menu {
    position: fixed;
    top: -100%;
    left: 0;
    width: 100%;
    background-color: var(--container-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 3.5rem 1.5rem 2rem;
    border-radius: 0 0 1.5rem 1.5rem;
    transition: top 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }
}

.nav__list {
  display: flex;
  flex-direction: column;
  row-gap: 1.5rem;
  text-align: center;
}

.nav__link {
  color: var(--title-color);
  font-weight: var(--font-medium);
  transition: color 0.3s;
}

.nav__link:hover {
  color: var(--first-color);
}

.nav__close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.5rem;
  color: var(--title-color);
  cursor: pointer;
}

.show-menu {
  top: 0;
}

.bg-header {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(12px);
}

.active-link {
  color: var(--first-color);
  font-weight: var(--font-semi-bold);
}

/*=============== BUTTONS ===============*/
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  column-gap: 0.5rem;
  background-color: var(--first-color);
  color: #fff;
  padding: 0.85rem 1.75rem;
  border-radius: 0.75rem;
  font-weight: var(--font-medium);
  box-shadow: 0 4px 14px rgba(66, 133, 244, 0.35);
  transition: background-color 0.3s, transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
}

.button:hover {
  background-color: var(--first-color-alt);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(66, 133, 244, 0.45);
}

.button--secondary {
  background-color: transparent;
  color: var(--title-color);
  border: 1.5px solid var(--border-color);
  box-shadow: none;
}

.button--secondary:hover {
  background-color: var(--container-color);
  color: var(--first-color);
  border-color: var(--first-color);
  transform: translateY(-3px);
}

/*=============== HOME ===============*/
.home__container {
  row-gap: 2.5rem;
  padding-top: 1.5rem;
}

.home__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  row-gap: 1.25rem;
}

.home__greeting {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--first-color-light);
  color: var(--first-color-alt);
  font-size: var(--small-font-size);
  font-weight: var(--font-semi-bold);
  padding: 0.35rem 0.85rem;
  border-radius: 2rem;
}

body.dark-theme .home__greeting {
  background-color: rgba(66, 133, 244, 0.15);
  color: var(--first-color);
}

.home__title {
  font-size: var(--biggest-font-size);
  line-height: 1.2;
}

.home__title span {
  color: var(--first-color);
}

.home__profession {
  font-size: var(--h3-font-size);
  color: var(--text-color);
  font-weight: var(--font-medium);
}

.home__description {
  font-size: var(--normal-font-size);
  max-width: 520px;
  line-height: 1.6;
}

.home__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.home__social {
  display: flex;
  column-gap: 1.25rem;
}

.home__social-link {
  width: 42px;
  height: 42px;
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--title-color);
  font-size: 1.25rem;
  transition: background-color 0.3s, color 0.3s, transform 0.3s, border-color 0.3s;
  box-shadow: var(--shadow-sm);
}

.home__social-link:hover {
  background-color: var(--first-color);
  color: #fff;
  border-color: var(--first-color);
  transform: translateY(-4px);
}

.home__img-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.home__avatar-box {
  width: 280px;
  height: 280px;
  border-radius: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  position: relative;
  background: var(--container-color);
  border: 1px solid var(--border-color);
  padding: 1rem;
}

.home__avatar-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 1.5rem;
}

.home__badge {
  position: absolute;
  bottom: -10px;
  background-color: var(--container-color);
  padding: 0.5rem 1rem;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  font-size: var(--small-font-size);
  font-weight: var(--font-medium);
  color: var(--title-color);
}

.home__badge i {
  color: #10b981;
}

/*=============== ABOUT ===============*/
.about__container {
  row-gap: 2.5rem;
}

.about__card-profile {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.about__icon-frame {
  font-size: 3.5rem;
  color: var(--first-color);
  margin-bottom: 0.75rem;
}

.about__data {
  text-align: center;
}

.about__description {
  line-height: 1.7;
  margin-bottom: 2rem;
}

.about__info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.about__box {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1rem 0.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, border-color 0.3s;
}

.about__box:hover {
  transform: translateY(-4px);
  border-color: var(--first-color);
}

.about__icon {
  font-size: 1.5rem;
  color: var(--first-color);
  margin-bottom: 0.5rem;
}

.about__title {
  font-size: var(--small-font-size);
  font-weight: var(--font-semi-bold);
  margin-bottom: 0.25rem;
}

.about__subtitle {
  font-size: var(--smaller-font-size);
  color: var(--text-color);
}

/*=============== SKILLS ===============*/
.skills__container {
  grid-template-columns: 1fr;
  row-gap: 2rem;
}

.skills__card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  padding: 1.75rem;
  border-radius: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
}

.skills__card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.skills__card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.skills__card-icon {
  width: 44px;
  height: 44px;
  background-color: var(--first-color-light);
  color: var(--first-color-alt);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
}

body.dark-theme .skills__card-icon {
  background-color: rgba(66, 133, 244, 0.18);
  color: var(--first-color);
}

.skills__group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.skills__item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.skills__item i {
  color: var(--first-color);
  font-size: 1rem;
  margin-top: 0.2rem;
}

.skills__name {
  font-size: var(--normal-font-size);
  font-weight: var(--font-medium);
  color: var(--title-color);
  line-height: 1.2;
}

.skills__level {
  font-size: var(--smaller-font-size);
  color: var(--text-color);
}

/*=============== SERVICES ===============*/
.services__container {
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.services__card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  padding: 2rem 1.5rem;
  border-radius: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.services__card:hover {
  transform: translateY(-5px);
  border-color: var(--first-color);
  box-shadow: var(--shadow-md);
}

.services__icon {
  font-size: 2.25rem;
  color: var(--first-color);
  margin-bottom: 1rem;
  display: inline-block;
}

.services__title {
  font-size: var(--h3-font-size);
  margin-bottom: 0.75rem;
}

.services__description {
  font-size: var(--small-font-size);
  line-height: 1.6;
}

/*=============== PROJECTS ===============*/
.projects__container {
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.projects__card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
}

.projects__card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.projects__img-wrapper {
  width: 100%;
  height: 190px;
  overflow: hidden;
  background-color: var(--body-color);
}

.projects__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.projects__card:hover .projects__img {
  transform: scale(1.04);
}

.projects__content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.projects__tag {
  font-size: var(--smaller-font-size);
  color: var(--first-color);
  font-weight: var(--font-semi-bold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.projects__title {
  font-size: var(--h3-font-size);
  margin-bottom: 0.6rem;
}

.projects__description {
  font-size: var(--small-font-size);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.projects__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.projects__tech-badge {
  font-size: var(--smaller-font-size);
  background-color: var(--body-color);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.6rem;
  border-radius: 0.5rem;
  color: var(--title-color);
}

.projects__links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.projects__link {
  font-size: var(--small-font-size);
  font-weight: var(--font-medium);
  color: var(--first-color);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.3s, transform 0.3s;
}

.projects__link:hover {
  color: var(--first-color-alt);
  transform: translateX(3px);
}

/*=============== CONTACT ===============*/
.contact__container {
  grid-template-columns: 1fr;
  row-gap: 2.5rem;
}

.contact__info {
  display: grid;
  gap: 1rem;
}

.contact__card {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: 1rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.contact__card-icon {
  font-size: 1.75rem;
  color: var(--first-color);
  margin-bottom: 0.4rem;
}

.contact__card-title {
  font-size: var(--normal-font-size);
  font-weight: var(--font-semi-bold);
  margin-bottom: 0.25rem;
}

.contact__card-data {
  font-size: var(--small-font-size);
  color: var(--text-color);
  display: block;
}

.contact__form {
  background-color: var(--container-color);
  border: 1px solid var(--border-color);
  padding: 2rem 1.5rem;
  border-radius: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: grid;
  row-gap: 1.25rem;
}

.contact__form-div {
  position: relative;
}

.contact__form-label {
  display: block;
  font-size: var(--small-font-size);
  font-weight: var(--font-medium);
  color: var(--title-color);
  margin-bottom: 0.4rem;
}

.contact__form-input {
  width: 100%;
  background-color: var(--body-color);
  border: 1.5px solid var(--border-color);
  color: var(--title-color);
  padding: 0.85rem 1rem;
  border-radius: 0.75rem;
  font-size: var(--normal-font-size);
  transition: border-color 0.3s;
}

.contact__form-input:focus {
  border-color: var(--first-color);
}

.contact__form-area {
  height: 120px;
  resize: none;
}

.contact__message-toast {
  display: none;
  font-size: var(--small-font-size);
  font-weight: var(--font-medium);
  text-align: center;
  padding: 0.6rem;
  border-radius: 0.5rem;
}

.contact__message-toast.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.15);
  color: #10b981;
}

/*=============== FOOTER ===============*/
.footer {
  background-color: var(--container-color);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 2rem;
  text-align: center;
  margin-top: 3rem;
}

.footer__title {
  font-size: var(--h2-font-size);
  margin-bottom: 0.5rem;
}

.footer__subtitle {
  font-size: var(--small-font-size);
  color: var(--text-color);
  margin-bottom: 1.5rem;
  display: block;
}

.footer__links {
  display: flex;
  justify-content: center;
  column-gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.footer__link {
  color: var(--title-color);
  font-size: var(--small-font-size);
  transition: color 0.3s;
}

.footer__link:hover {
  color: var(--first-color);
}

.footer__social {
  display: flex;
  justify-content: center;
  column-gap: 1.25rem;
  margin-bottom: 2rem;
}

.footer__social-link {
  font-size: 1.25rem;
  color: var(--title-color);
  transition: color 0.3s, transform 0.3s;
}

.footer__social-link:hover {
  color: var(--first-color);
  transform: translateY(-3px);
}

.footer__copy {
  font-size: var(--smaller-font-size);
  color: var(--text-color);
}

/*=============== SCROLL UP ===============*/
.scrollup {
  position: fixed;
  right: 1.5rem;
  bottom: -30%;
  background-color: var(--first-color);
  color: #fff;
  display: inline-flex;
  padding: 0.55rem;
  border-radius: 0.6rem;
  font-size: 1.25rem;
  z-index: var(--z-tooltip);
  transition: bottom 0.4s, background-color 0.3s, transform 0.3s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.scrollup:hover {
  background-color: var(--first-color-alt);
  transform: translateY(-3px);
}

.show-scroll {
  bottom: 2rem;
}

/*=============== BREAKPOINTS ===============*/
@media screen and (min-width: 576px) {
  .skills__container {
    grid-template-columns: repeat(2, 1fr);
  }

  .services__container {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects__container {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact__info {
    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 3rem;
  }

  .nav {
    height: calc(var(--header-height) + 1rem);
  }

  .nav__toggle,
  .nav__close {
    display: none;
  }

  .nav__list {
    flex-direction: row;
    column-gap: 2rem;
  }

  .home__container {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    text-align: left;
  }

  .home__content {
    align-items: flex-start;
    text-align: left;
  }

  .home__avatar-box {
    width: 320px;
    height: 320px;
  }

  .home__buttons {
    justify-content: flex-start;
  }

  .about__container {
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
  }

  .about__data {
    text-align: left;
  }

  .contact__container {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: start;
  }
}

@media screen and (min-width: 1024px) {
  .services__container {
    grid-template-columns: repeat(3, 1fr);
  }

  .skills__container {
    grid-template-columns: repeat(3, 1fr);
  }

  .projects__container {
    grid-template-columns: repeat(3, 1fr);
  }
}