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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #050505;
  color: #e5e7eb;
  line-height: 1.6;
}

/* HEADER */

.header {
  min-height: 720px;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.09), transparent 35%),
    linear-gradient(135deg, #000000 0%, #080808 45%, #1a1a1a 100%);
  color: white;
}

/* NAVIGATION */

.nav {
  max-width: 1150px;
  margin: auto;
  padding: 28px 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 1px;
  color: #ffffff;
}

.logo span {
  color: #9ca3af;
  font-weight: 700;
}

.nav-links a {
  color: #f3f4f6;
  text-decoration: none;
  margin-left: 28px;
  font-weight: 700;
  transition: 0.3s ease;
}

.nav-links a:hover {
  color: #9ca3af;
}

/* HERO */

.hero {
  max-width: 1150px;
  margin: auto;
  padding: 115px 22px 80px;
}

.hero-content {
  max-width: 780px;
}

.tagline,
.section-label {
  color: #a3a3a3;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 14px;
}

h1 {
  font-size: 58px;
  line-height: 1.05;
  margin-bottom: 24px;
  color: white;
  max-width: 850px;
}

.hero-text {
  font-size: 20px;
  color: #d1d5db;
  max-width: 690px;
  margin-bottom: 34px;
}

/* BUTTONS */

.buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn,
button {
  display: inline-block;
  padding: 15px 26px;
  border-radius: 14px;
  text-decoration: none;
  border: none;
  font-weight: 900;
  cursor: pointer;
  transition: 0.3s ease;
  font-size: 15px;
}

.primary,
button {
  background: #ffffff;
  color: #050505;
  box-shadow: 0 14px 35px rgba(255, 255, 255, 0.12);
}

.primary:hover,
button:hover {
  background: #d4d4d4;
  transform: translateY(-2px);
}

.secondary {
  background: #151515;
  color: #ffffff;
  border: 1px solid #3a3a3a;
}

.secondary:hover {
  background: #262626;
  transform: translateY(-2px);
}

/* SECTIONS */

.section {
  max-width: 1150px;
  margin: auto;
  padding: 90px 22px;
}

.section h2,
.about h2,
.cta h2 {
  font-size: 40px;
  line-height: 1.2;
  margin-bottom: 18px;
  color: white;
}

.section p,
.about p {
  color: #cbd5e1;
  max-width: 760px;
}

/* CARDS */

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 38px;
}

.card,
.about-box,
form {
  background: #111111;
  color: #e5e7eb;
  border: 1px solid #2a2a2a;
  border-radius: 22px;
  padding: 28px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.55);
}

.card {
  transition: 0.3s ease;
}

.card:hover {
  background: #1a1a1a;
  border-color: #4b5563;
  transform: translateY(-6px);
}

.card h3 {
  color: #ffffff;
  font-size: 20px;
  margin-bottom: 12px;
}

.card p {
  color: #cbd5e1;
}

/* ABOUT */

.about {
  max-width: 1150px;
  margin: auto;
  padding: 85px 22px;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 34px;
  align-items: center;
}

.about-box h3 {
  color: white;
  margin-bottom: 12px;
}

.about-box ul {
  padding-left: 20px;
  margin-top: 12px;
}

.about-box li {
  margin-bottom: 10px;
  color: #d1d5db;
}

/* CTA */

.cta {
  margin: 40px auto 80px;
  max-width: 1050px;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.1), transparent 35%),
    linear-gradient(135deg, #000000, #151515);
  border: 1px solid #2f2f2f;
  color: white;
  border-radius: 28px;
  padding: 62px 30px;
  text-align: center;
  box-shadow: 0 22px 55px rgba(0, 0, 0, 0.55);
}

.cta p {
  margin-bottom: 28px;
  color: #d1d5db;
}

/* CONTACT FORM */

.contact form {
  display: grid;
  gap: 16px;
  max-width: 700px;
  margin-top: 28px;
}

input,
textarea {
  width: 100%;
  padding: 16px;
  background: #080808;
  color: white;
  border: 1px solid #333333;
  border-radius: 14px;
  font: inherit;
  outline: none;
  transition: 0.3s ease;
}

input::placeholder,
textarea::placeholder {
  color: #9ca3af;
}

input:focus,
textarea:focus {
  border-color: #9ca3af;
  box-shadow: 0 0 0 4px rgba(156, 163, 175, 0.14);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.note {
  margin-top: 14px;
  color: #9ca3af;
  font-size: 14px;
}

/* FOOTER */

footer {
  text-align: center;
  padding: 30px;
  background: #000000;
  color: #d1d5db;
  border-top: 1px solid #222222;
}

/* RESPONSIVE DESIGN */

@media (max-width: 1000px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  h1 {
    font-size: 44px;
  }

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

  .nav {
    align-items: flex-start;
    gap: 18px;
    flex-direction: column;
  }

  .nav-links a {
    margin-left: 0;
    margin-right: 18px;
  }
}

@media (max-width: 560px) {
  .header {
    min-height: auto;
  }

  .hero {
    padding-top: 70px;
  }

  h1 {
    font-size: 35px;
  }

  .hero-text {
    font-size: 18px;
  }

  .section h2,
  .about h2,
  .cta h2 {
    font-size: 30px;
  }

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

  .nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-links a {
    margin-right: 10px;
    font-size: 14px;
  }
}