:root {
  --black: #1f1f1f;
  --white: #fff;
  --text-muted: rgba(255, 255, 255, 0.85);
  --max-width: 1800px;
  --intro-max: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--white);
  background-color: var(--black);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

a:hover {
  opacity: 0.85;
}

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

/* Navigation */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 24px 48px;
  background-color: var(--black);
  transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.site-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-nav.site-nav--hidden {
  transform: translateY(-100%);
  pointer-events: none;
}

.logo-link {
  display: inline-block;
  line-height: 0;
}

.logo-image {
  width: 40px;
  height: auto;
}

/* Intro */
.intro-section {
  padding: 0 48px 80px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.container--intro {
  max-width: var(--intro-max);
}

.heading-jumbo {
  margin: 0 0 32px;
  font-size: clamp(2rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.heading-jumbo:last-child {
  margin-bottom: 0;
}

.heading-jumbo a {
  text-decoration: underline;
}

/* Projects grid */
.projects-section {
  padding: 0 48px 10%;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.project-item {
  display: flex;
  flex-direction: column;
}

.project-title-container {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-bottom: 12px;
}

.project-title,
h2.project-title {
  margin: 0;
  font-size: clamp(1rem, 2vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.project-type {
  margin: 0;
  padding: 2px 10px;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--white);
  border-radius: 8px;
}

.project-image-container {
  position: relative;
  width: 100%;
  padding-top: 66.7%;
  border-radius: 0.5rem;
  overflow: hidden;
}

.project-preview {
  position: absolute;
  inset: 0;
  display: block;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  transition: opacity 0.5s ease;
}

.project-preview:hover,
.project-preview:focus-visible {
  opacity: 0.7;
}

.project-preview--login-help {
  background-image: url("../images/projects/login-help.svg");
}

.project-preview--login-security {
  background-image: url("../images/projects/login-security.svg");
}

.project-preview--login-auth {
  background-image: url("../images/projects/login-auth.svg");
}

.project-preview--flare {
  background-image: url("../images/projects/flare.svg");
}

.project-preview--ibm {
  background-image: url("../images/projects/ibm.svg");
}

.project-preview--nido {
  background-image: url("../images/projects/atelier-nido.jpg");
}

.project-preview--tc {
  background-image: url("../images/projects/tia-carmen.png");
}

.project-preview--uber {
  background-image: url("../images/projects/uber.jpg");
}

/* Contact */
.contact-section {
  padding: 80px 48px 120px;
  background-color: var(--black);
}

.contact {
  max-width: var(--intro-max);
  margin: 0 auto;
}

.contact-headline {
  margin: 0 0 24px;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 300;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.p-contact {
  margin: 0;
  font-size: 1.125rem;
}

.p-contact a {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 991px) {
  .site-nav,
  .intro-section,
  .projects-section,
  .contact-section {
    padding-left: 24px;
    padding-right: 24px;
  }

  .project-grid {
    gap: 25px;
  }

  .project-title-container {
    margin-bottom: 0;
  }

  .project-title {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.07em;
  }
}

@media (max-width: 767px) {
  .project-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .heading-jumbo {
    margin-bottom: 24px;
  }
}

@media (max-width: 479px) {
  .site-nav {
    padding: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav {
    transition: none;
  }
}