/* Matthew Stein — martechmatthew.com */

:root {
  --color-text: #222;
  --color-text-muted: #777;
  --color-bg: #fff;
  --color-border: #ddd;
  --color-accent: #222;
  --font-body: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1080px;
  --content-width: 680px;
  --spacing: 1.5rem;
  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  opacity: 0.75;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 1rem;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.15rem; }

p {
  margin: 0 0 1rem;
}

ul, ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}

strong {
  font-weight: 600;
}

/* Layout */

.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing);
}

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

main {
  flex: 1;
  padding: 2.5rem 0 4rem;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 1rem;
}

.site-logo img {
  height: 48px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.25rem 1.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 400;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  opacity: 1;
  text-decoration: underline;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
}

/* Buttons */

.btn {
  display: inline-block;
  padding: 0.65rem 1.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 400;
  text-decoration: none;
  border: 2px solid var(--color-accent);
  border-radius: 4px;
  background: transparent;
  color: var(--color-accent);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.btn:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  opacity: 1;
}

.btn--center {
  display: table;
  margin: 1.5rem auto 0;
}

/* Homepage */

.hero {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 2.5rem;
  align-items: start;
}

.hero__photo img {
  width: 100%;
  border-radius: 2px;
}

.hero__content .btn {
  margin-top: 0.5rem;
}

/* Marketing page */

.page-banner {
  margin-bottom: 2rem;
}

.page-banner img {
  width: 100%;
  max-width: 632px;
  margin: 0 auto;
}

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

.service-card {
  text-align: center;
}

.service-card h2 {
  text-align: center;
  margin-bottom: 1rem;
}

.service-card p,
.service-card ul {
  text-align: left;
}

.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

/* Blog */

.blog-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-list__item {
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border);
}

.blog-list__item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.blog-list__image {
  margin-bottom: 1.25rem;
}

.blog-list__image img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: 2px;
}

.blog-list__title {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.blog-list__title a {
  text-decoration: none;
}

.blog-list__title a:hover {
  text-decoration: underline;
}

.blog-meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.blog-meta a {
  color: var(--color-text-muted);
}

.blog-tags {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 1.5rem;
}

.blog-tags a {
  color: var(--color-text-muted);
}

.blog-post__header-image {
  margin-bottom: 1.5rem;
}

.blog-post__header-image img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: 2px;
}

.blog-post h2 {
  margin-top: 2rem;
}

/* Contact */

.contact-info {
  margin-bottom: 2rem;
}

.contact-info p {
  margin-bottom: 0.5rem;
}

.contact-form {
  margin-top: 1rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  text-align: center;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-text);
  color: var(--color-bg);
  text-decoration: none;
  transition: opacity 0.15s;
}

.social-links a:hover {
  opacity: 0.7;
}

.social-links svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Responsive */

@media (max-width: 900px) {
  .services-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .service-card {
    max-width: 540px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: none;
    padding: 1rem var(--spacing);
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .site-nav li {
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav li:last-child {
    border-bottom: none;
  }

  .site-nav a {
    display: block;
    padding: 0.75rem 0;
  }

  .site-header {
    position: relative;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero__photo {
    max-width: 250px;
    margin: 0 auto;
  }

  h1 { font-size: 1.5rem; }
  .blog-list__title { font-size: 1.4rem; }
}

@media (max-width: 480px) {
  :root {
    --spacing: 1rem;
  }

  main {
    padding: 1.5rem 0 3rem;
  }

  .site-logo img {
    height: 36px;
  }
}