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

/* ========== VARIABLES ========== */
:root {
  --color-primary: #072ac8;
  --color-primary-hover: #1e4ef5;
  --color-dark: #292e47;
  --color-text: #6b708d;
  --color-light: #f2f4fc;
  --color-white: #ffffff;
  --color-yellow: #ffc600;
  --color-cyan: #43d2ff;

  --container-width: 1020px;
  --transition: 0.3s ease;
  --card-shadow: 0 8px 30px rgba(41, 46, 71, 0.08);
}

/* ========== BASE ========== */
html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--color-light);
  color: var(--color-dark);
  line-height: 1.5;
  padding-top: 98px;
}

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

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

ul {
  list-style: none;
}

section {
  width: min(88%, var(--container-width));
  margin: 0 auto;
}

/* ========== TITLES & TEXT ========== */
h1,
h2,
h3,
h4 {
  color: var(--color-dark);
}

h1 {
  font-size: 3rem;
  line-height: 1.1;
}

h2 {
  font-size: 2.5rem;
  line-height: 1.2;
}

p {
  color: var(--color-text);
  font-size: 1rem;
}

/* ========== BUTTONS ========== */
.btn-primary,
.contact-btn {
  display: inline-block;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 15px 28px;
  font-weight: 500;
  transition: var(--transition);
}

.btn-primary:hover,
.contact-btn:hover {
  color: #ffc600;
}

.btn-secondary {
  display: inline-block;
  color: var(--color-text);
  font-weight: 600;
  transition: var(--transition);
}

.btn-secondary:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ========== HEADER / NAVBAR ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-light);
  z-index: 1200;
  padding: 18px 0 14px;
}

.navbar {
  width: min(88%, var(--container-width));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo img {
  width: 82px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition);
}

.nav-links a:hover {
  text-decoration: underline;
}

.contact-btn {
  margin-left: 10px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  margin: 5px auto;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== REUSABLE PROJECT CARDS ========== */
.projects-container {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
}

.project-card {
  background-color: var(--color-white);
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.3s ease;
}

.project-card:hover {
  box-shadow: 0 12px 26px rgba(13, 15, 24, 0.24);
}

.project-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.project-card-content {
  padding: 30px;
}

.project-card-content h3 {
  margin-bottom: 10px;
}

.project-card-content p {
  margin-bottom: 40px;
}

.project-card-content a {
  color: var(--color-primary);
  font-weight: 600;
}

.project-card-content a:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .projects-container {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (max-width: 760px) {
  .projects-container {
    grid-template-columns: 1fr;
  }
}



/* ========== REUSABLE NEWSLETTER ========== */
.newsletter {
  margin-top: 140px;
  background-color: var(--color-yellow);
  text-align: center;
  padding: 80px 40px;
}

.newsletter h2 {
  margin-bottom: 20px;
}

.newsletter p {
  color: var(--color-dark);
  margin-bottom: 40px;
}

.newsletter-form {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.input-wrapper {
  background-color: var(--color-white);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 20px;
  min-width: 320px;
  border: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.input-wrapper:hover {
  border-color: #000000;
}

.input-wrapper img {
  width: 20px;
}

.input-wrapper input {
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: 1rem;
}

.newsletter-form .btn-primary {
  padding: 15px 28px;
}

/* ========== FOOTER ========== */
.footer {
  width: min(88%, var(--container-width));
  margin: 124px auto 44px;
  padding: 4px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 72px;
}

.footer-left {
  max-width: 245px;
}

.footer-logo {
  display: inline-block;
}

.footer-left img {
  width: 70px;
  margin-bottom: 18px;
}

.footer-left p {
  color: #000000;
  line-height: 1.42;
  font-size: 0.96rem;
}

.footer-right {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 34px 86px;
}

.footer-right a {
  color: #000000;
  font-size: 0.96rem;
  transition: var(--transition);
}

.footer-right a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 765px) {
  h1 {
    font-size: 2.2rem;
  }

  h2 {
    font-size: 2rem;
  }

  body {
    padding-top: 88px;
  }

  .header {
    padding: 16px 0 12px;
  }

  .navbar {
    width: min(90%, var(--container-width));
    position: relative;
  }

  section {
    width: min(90%, var(--container-width));
  }

  .menu-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    width: min(92vw, 360px);
    background-color: var(--color-light);
    padding: 18px 18px 20px;
    border-radius: 16px;
    box-shadow: 0 14px 28px rgba(41, 46, 71, 0.16);
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 18px;
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    gap: 16px;
  }

  .nav-links a {
    font-size: 0.98rem;
  }

  .contact-btn {
    margin-left: 0;
    padding: 13px 22px;
  }

  .newsletter {
    padding: 60px 20px;
  }

  .input-wrapper {
    min-width: 100%;
  }

  .footer {
  width: min(90%, var(--container-width));
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 34px;
}

.footer-left {
  max-width: 280px;
  text-align: center;
}

.footer-logo {
  display: inline-flex;
  justify-content: center;
}

.footer-right {
  grid-template-columns: repeat(2, auto);
  justify-content: center;
  gap: 22px 46px;
  text-align: center;
}
}

  /* ========== BACK TO TOP BUTTON ========== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 72px;
  height: 72px;
  background-color: var(--color-white);
  border: 0.5px solid rgba(41, 46, 71, 0.12);
  border-radius: 50%;
  padding: 0.5px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  box-shadow: 0 8px 18px rgba(41, 46, 71, 0.16);
  z-index: 1000;
  animation: backToTopBounce 3.0s ease-in-out infinite;
}

.back-to-top img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}

@keyframes backToTopBounce {
  0% {
    transform: translateY(0);
  }
  25% {
    transform: translateY(-12px);
  }
  50% {
    transform: translateY(-24px);
  }
  75% {
    transform: translateY(-12px);
  }
  100% {
    transform: translateY(0);
  }
}