:root {
  --color-bg: #f8fafc;
  --color-bg-alt: #eef2f7;
  --color-surface: #ffffff;

  --color-text: #1f2937;
  --color-text-muted: #4b5563;

  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;

  --color-border: #d1d5db;

  --container-width: 1160px;
}

* {
  box-sizing: border-box;
}

.logo {
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.logo img {
  height: 32px; /* ajustable */
  width: auto;
  display: block;
}

.logo span {
  font-weight: 600;
  font-size: 1.1rem;
  color: #1F2937;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.container {
  width: min(100% - 2rem, var(--container-width));
  margin: auto;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.hero {
  padding: 6rem 0;
}

.hero__inner {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero__inner {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.hero-placeholder {
  background: #e5e7eb;
  height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

.hero-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-illustration img {
  max-width: 420px;
  width: 100%;
  height: auto;
}

.section {
  padding: 5rem 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

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

@media (min-width: 768px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  border-radius: 8px;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: white;
}

.btn--secondary {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.btn--secondary:hover {
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-primary);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  background: #fff;
}

.contact-form {
  max-width: 760px;
}

.form-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .form-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.form-group label {
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
}

.form-group textarea {
  resize: vertical;
  min-height: 160px;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.footer-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid li {
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

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

a:not(.btn):hover {
  color: var(--color-primary);
}

.site-nav a {
  text-decoration: none;
  font-weight: 500;
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0%;
  height: 2px;
  background: var(--color-primary);
  transition: 0.3s;
}

.site-nav a:hover::after {
  width: 100%;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.burger span {
  width: 25px;
  height: 3px;
  background: var(--color-text);
  display: block;
}

@media (max-width: 768px) {
  .site-nav {
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: white;
    flex-direction: column;
    padding: 2rem;
    display: none;
  }

  .site-nav.active {
    display: flex;
  }

  .burger {
    display: flex;
  }
}