/*=============== MODERN CSS VARIABLES ===============*/
:root {
  /* Colors */
  --first-color: #2563eb;
  --first-color-alt: #1d4ed8;
  --first-color-light: #dbeafe;
  --title-color: #1f2937;
  --text-color: #6b7280;
  --text-color-light: #9ca3af;
  --body-color: #ffffff;
  --container-color: #f9fafb;
  --border-color: #e5e7eb;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --gradient-color: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Typography */
  --body-font: 'Inter', sans-serif;
  --title-font: 'Poppins', sans-serif;
  --biggest-font-size: 3rem;
  --h1-font-size: 2.25rem;
  --h2-font-size: 1.875rem;
  --h3-font-size: 1.5rem;
  --normal-font-size: 1rem;
  --small-font-size: 0.875rem;
  --smaller-font-size: 0.75rem;
  
  /* Font Weight */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semi-bold: 600;
  --font-bold: 700;
  
  /* Spacing */
  --mb-0-25: 0.25rem;
  --mb-0-5: 0.5rem;
  --mb-0-75: 0.75rem;
  --mb-1: 1rem;
  --mb-1-25: 1.25rem;
  --mb-1-5: 1.5rem;
  --mb-2: 2rem;
  --mb-2-5: 2.5rem;
  --mb-3: 3rem;
  
  /* Z-index */
  --z-tooltip: 10;
  --z-fixed: 100;
  --z-modal: 1000;
  
  /* Border Radius */
  --border-radius: 0.75rem;
  --border-radius-small: 0.5rem;
  
  /* Transitions */
  --transition: all 0.3s ease;
  --transition-fast: all 0.2s ease;
}

/* Responsive Typography */
@media screen and (max-width: 992px) {
  :root {
    --biggest-font-size: 2.5rem;
    --h1-font-size: 2rem;
    --h2-font-size: 1.5rem;
    --h3-font-size: 1.25rem;
    --normal-font-size: 0.938rem;
    --small-font-size: 0.813rem;
    --smaller-font-size: 0.75rem;
  }
}

/*=============== 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);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  color: var(--title-color);
  font-weight: var(--font-semi-bold);
  font-family: var(--title-font);
  line-height: 1.2;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
}

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

/*=============== REUSABLE CSS CLASSES ===============*/
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--mb-1-5);
  padding-right: var(--mb-1-5);
}

.grid {
  display: grid;
}

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

.section__title {
  font-size: var(--h2-font-size);
  color: var(--title-color);
  text-align: center;
  margin-bottom: var(--mb-3);
}

.section__subtitle {
  display: block;
  font-size: var(--small-font-size);
  color: var(--first-color);
  text-align: center;
  font-weight: var(--font-medium);
  margin-bottom: var(--mb-0-75);
  text-transform: uppercase;
  letter-spacing: 0.1rem;
}

/*=============== BUTTONS ===============*/
.button {
  display: inline-block;
  background-color: var(--first-color);
  color: var(--body-color);
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: var(--font-medium);
  transition: var(--transition);
  border: 2px solid var(--first-color);
  cursor: pointer;
  text-align: center;
  font-size: var(--normal-font-size);
}

.button:hover {
  background-color: var(--first-color-alt);
  border-color: var(--first-color-alt);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

.button--outline {
  background-color: transparent;
  color: var(--first-color);
  border: 2px solid var(--first-color);
}

.button--outline:hover {
  background-color: var(--first-color);
  color: var(--body-color);
}

/*=============== HEADER & NAV ===============*/
.header {
  width: 100%;
  position: fixed;
  background-color: var(--body-color);
  top: 0;
  left: 0;
  z-index: var(--z-fixed);
  transition: var(--transition);
  box-shadow: 0 2px 20px var(--shadow-color);
}

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

.nav__logo {
  display: flex;
  align-items: center;
}

.nav__logo-img {
  height: 2.5rem;
  width: auto;
}

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

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

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

.nav__link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -0.5rem;
  left: 0;
  background-color: var(--first-color);
  transition: var(--transition);
}

.nav__link:hover::after,
.nav__link.active-link::after {
  width: 100%;
}

.nav__toggle,
.nav__close {
  display: none;
}

/*=============== HERO ===============*/
.hero {
  padding-top: 8rem;
  background: linear-gradient(135deg, var(--container-color) 0%, var(--body-color) 100%);
}

.hero__container {
  gap: 3rem;
  grid-template-columns: repeat(2, 1fr);
  align-items: center;
}

.hero__content {
  order: 1;
}

.hero__title {
  font-size: var(--biggest-font-size);
  font-weight: var(--font-bold);
  margin-bottom: var(--mb-1);
  line-height: 1.1;
}

.hero__title-accent {
  background: var(--gradient-color);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__description {
  margin-bottom: var(--mb-2-5);
  font-size: var(--normal-font-size);
  line-height: 1.7;
}

.hero__buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__image {
  order: 2;
  justify-self: center;
}

.hero__img {
  width: 100%;
  border-radius: var(--border-radius);
  box-shadow: 0 20px 40px var(--shadow-color);
}

/*=============== ABOUT ===============*/
.about {
  background-color: var(--container-color);
}

.about__container {
  gap: 3rem;
  grid-template-columns: repeat(2, 1fr);
  align-items: center;
}

.about__data {
  text-align: left;
}

.about__description {
  margin-bottom: var(--mb-2);
  line-height: 1.7;
}

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

.about__info-item {
  text-align: center;
  padding: 1.5rem;
  background-color: var(--body-color);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: var(--transition);
}

.about__info-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px var(--shadow-color);
}

.about__info-title {
  font-size: var(--h2-font-size);
  color: var(--first-color);
  margin-bottom: var(--mb-0-5);
}

.about__info-subtitle {
  font-size: var(--small-font-size);
  color: var(--text-color);
}

.about__img {
  border-radius: var(--border-radius);
  box-shadow: 0 20px 40px var(--shadow-color);
}

/*=============== FEATURES ===============*/
.features {
  text-align: center;
}

.features__description {
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/*=============== SERVICES ===============*/
.services {
  background-color: var(--container-color);
}

.services__content {
  text-align: center;
  margin-bottom: var(--mb-3);
}

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

.services__card {
  background-color: var(--body-color);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: var(--transition);
  text-align: center;
}

.services__card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--shadow-color);
}

.services__card:hover .services__img {
  transform: scale(1.05);
}

.services__card-image {
  margin-bottom: var(--mb-1-5);
}

.services__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.services__card-title {
  font-size: var(--h3-font-size);
  margin-bottom: var(--mb-1);
  color: var(--title-color);
}

.services__card-description {
  line-height: 1.6;
  color: var(--text-color);
}

/*=============== CONTACT ===============*/
.contact__header {
  text-align: center;
  margin-bottom: var(--mb-3);
}

.contact__description {
  max-width: 600px;
  margin: 0 auto var(--mb-3);
  line-height: 1.7;
}

.contact__content {
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact__form-wrapper,
.contact__image {
  height: 550px;
}

.contact__form {
  background-color: var(--body-color);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 8px 30px var(--shadow-color);
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.contact__form-group {
  margin-bottom: var(--mb-1-5);
}

.contact__form-label {
  display: block;
  font-weight: var(--font-medium);
  margin-bottom: var(--mb-0-5);
  color: var(--title-color);
}

.contact__form-input,
.contact__form-textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-small);
  font-family: var(--body-font);
  font-size: var(--normal-font-size);
  transition: var(--transition);
  background-color: var(--container-color);
}

.contact__form-input:focus,
.contact__form-textarea:focus {
  outline: none;
  border-color: var(--first-color);
  box-shadow: 0 0 0 3px var(--first-color-light);
}

.contact__form-textarea {
  resize: vertical;
  min-height: 120px;
  flex-grow: 1;
}

.contact__form-button {
  width: 100%;
  margin-top: var(--mb-1);
}

.contact__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: 0 20px 40px var(--shadow-color);
}

/*=============== FOOTER ===============*/
.footer {
  background-color: var(--title-color);
  color: var(--body-color);
  padding-top: 3rem;
}

.footer__container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: var(--mb-2);
}

.footer__content {
  display: flex;
  flex-direction: column;
}

.footer__logo-img {
  height: 2rem;
  width: auto;
  margin-bottom: var(--mb-1);
}

.footer__description {
  margin-bottom: var(--mb-1);
  line-height: 1.6;
  color: var(--text-color-light);
}

.footer__title {
  font-size: var(--h3-font-size);
  margin-bottom: var(--mb-1);
  color: var(--body-color);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

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

.footer__social-links {
  display: flex;
  gap: 1rem;
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--first-color);
  border-radius: 50%;
  color: var(--body-color);
  font-size: 1.2rem;
  transition: var(--transition);
}

.footer__social-link:hover {
  background-color: var(--first-color-alt);
  transform: translateY(-2px);
}

.footer__bottom {
  border-top: 1px solid var(--border-color);
  padding: var(--mb-2) 0;
}

.footer__bottom-container {
  text-align: center;
}

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

/*=============== SCROLL UP ===============*/
.scrollup {
  position: fixed;
  right: 1rem;
  bottom: -20%;
  background-color: var(--first-color);
  opacity: 0.8;
  padding: 0.3rem;
  border-radius: 0.4rem;
  z-index: var(--z-tooltip);
  transition: var(--transition);
}

.scrollup:hover {
  background-color: var(--first-color-alt);
}

.scrollup__icon {
  font-size: 1.5rem;
  color: var(--body-color);
}

.show-scroll {
  bottom: 5rem;
}

/*=============== BREAKPOINTS ===============*/
/* For large devices */
@media screen and (max-width: 992px) {
  .container {
    margin-left: var(--mb-1-5);
    margin-right: var(--mb-1-5);
  }

  .hero__container,
  .about__container,
  .contact__container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero__content {
    order: 2;
    text-align: center;
  }

  .hero__image {
    order: 1;
  }

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

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

/* For medium devices */
@media screen and (max-width: 768px) {
  .nav__menu {
    position: fixed;
    background-color: var(--body-color);
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    padding: 4rem 0 0 3rem;
    box-shadow: -2px 0 4px var(--shadow-color);
    transition: var(--transition);
  }

  .nav__list {
    flex-direction: column;
    row-gap: 1.5rem;
  }

  .nav__close {
    display: block;
    position: absolute;
    top: 0.75rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--title-color);
  }

  .nav__toggle {
    display: block;
    font-size: 1.1rem;
    cursor: pointer;
    color: var(--title-color);
  }

  .show-menu {
    right: 0;
  }

  .section {
    padding: 4rem 0 2rem;
  }

  .hero {
    padding-top: 6rem;
  }

  .hero__buttons {
    justify-content: center;
  }

  .about__info {
    grid-template-columns: 1fr;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .contact__content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* For small devices */
@media screen and (max-width: 350px) {
  .container {
    margin-left: var(--mb-1);
    margin-right: var(--mb-1);
  }

  .hero__buttons {
    flex-direction: column;
    align-items: center;
  }

  .button {
    width: 100%;
    max-width: 200px;
  }

  .nav__menu {
    padding: 2rem 1.25rem 0;
  }

  .services__card {
    padding: 1.5rem;
  }

  .contact__form {
    padding: 1.5rem;
  }
}

/*=============== ANIMATIONS ===============*/
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling for all links */
html {
  scroll-behavior: smooth;
}

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid var(--first-color);
  outline-offset: 2px;
}

/* Loading animation */
.loading {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.loading.loaded {
  opacity: 1;
  transform: translateY(0);
}