:root {
  --page-bg: #ffffff;
  --text: #171717;
  --muted: #686868;
  --line: #e9e9e9;

  --font-sans: "Helvetica Neue", Helvetica, Arial, sans-serif;

  --header-x: 44px;
  --header-y: 25px;
  --logo-height: 54px;
  --nav-size: 16px;
  --nav-gap: 27px;

  --content-wide: 1280px;
  --content-reading: 720px;
  --page-side: 44px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--page-bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--page-bg);
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  left: 12px;
  top: 12px;
  z-index: 1000;
  padding: 8px 12px;
  background: #fff;
  border: 1px solid var(--text);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

/* =========================
   HEADER
   ========================= */

.site-header {
  position: relative;
  z-index: 50;
  width: 100%;
  background: rgba(255,255,255,.98);
}

.site-header__inner {
  min-height: 108px;
  padding: var(--header-y) var(--header-x);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  column-gap: 56px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.site-logo img {
  display: block;
  width: auto;
  height: var(--logo-height);
  object-fit: contain;
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--nav-gap);
  padding-top: 14px;
  white-space: nowrap;
}

.site-nav a {
  position: relative;
  text-decoration: none;
  font-size: var(--nav-size);
  font-weight: 300;
  line-height: 1;
  letter-spacing: .02em;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  opacity: .62;
}

.site-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 17px;
  padding-top: 5px;
}

.nav-toggle {
  width: 36px;
  height: 36px;
  padding: 6px;
  border: 0;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  display: none;
}

.paypal-bag-slot {
  position: relative;
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
}

.paypal-bag-slot paypal-cart-button {
  position: absolute;
  top: 50%;
  right: 0;
  display: block;
  transform: translateY(-50%) scale(.76);
  transform-origin: right center;
}

.nav-toggle span {
  display: block;
  width: 21px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
  transition: transform .18s ease, opacity .18s ease;
}

/* =========================
   HOME
   ========================= */

.home-page .site-footer {
  display: none;
}

.home-hero {
  padding: 40px 0;
  display: grid;
  place-items: center;
}

.home-hero__stage {
  width: min(72vw, 960px);
  display: flex;
  justify-content: center;
  align-items: center;
}

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

/* =========================
   STANDARD PAGE SHELL
   ========================= */

.page-shell {
  width: min(calc(100% - (var(--page-side) * 2)), var(--content-wide));
  margin: 0 auto;
  padding: 70px 0 120px;
}

.page-shell--reading {
  width: min(calc(100% - (var(--page-side) * 2)), var(--content-reading));
}

.page-title {
  margin: 0 0 54px;
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: .01em;
}

.page-placeholder {
  max-width: 620px;
  color: var(--muted);
  font-size: 17px;
}

.page-placeholder p {
  margin: 0 0 1.3em;
}

/* =========================
   FOOTER
   ========================= */

.site-footer {
  width: min(calc(100% - (var(--page-side) * 2)), var(--content-wide));
  margin: 0 auto;
  padding: 34px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

/* =========================
   TABLET / MOBILE
   ========================= */

@media (max-width: 1120px) {
  :root {
    --header-x: 28px;
    --page-side: 28px;
    --nav-gap: 18px;
    --nav-size: 16px;
  }

  .site-header__inner {
    column-gap: 28px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-x: 20px;
    --header-y: 17px;
    --page-side: 20px;
    --logo-height: 44px;
  }

  .site-header__inner {
    min-height: 78px;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    padding: var(--header-y) var(--header-x);
    column-gap: 18px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 60;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 10px var(--header-x) 18px;
    background: #fff;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

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

  .site-nav a {
    width: 100%;
    padding: 12px 0;
    font-size: 16px;
  }

  .site-nav a::after {
    display: none;
  }

  .site-actions {
    padding-top: 0;
    gap: 4px;
  }

  .paypal-bag-slot {
    width: 34px;
    height: 34px;
    flex-basis: 34px;
  }

  .paypal-bag-slot paypal-cart-button {
    transform: translateY(-50%) scale(.68);
  }

  .nav-toggle {
    display: block;
    width: 34px;
    height: 34px;
    padding: 5px;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .home-hero {
    padding: 28px 0 48px;
  }

  .home-hero__stage {
    width: min(88vw, 780px);
  }

  .page-shell {
    padding-top: 48px;
    padding-bottom: 88px;
  }

  .page-title {
    margin-bottom: 38px;
  }
}

@media (max-width: 520px) {
  :root {
    --header-x: 16px;
    --header-y: 15px;
    --page-side: 18px;
    --logo-height: 40px;
  }

  .site-header__inner {
    min-height: 70px;
    column-gap: 12px;
  }

  .site-nav a {
    padding: 11px 0;
    font-size: 15px;
  }

  .paypal-bag-slot {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
  }

  .paypal-bag-slot paypal-cart-button {
    transform: translateY(-50%) scale(.64);
  }

  .nav-toggle {
    width: 32px;
    height: 32px;
    padding: 4px;
  }

  .home-hero__stage {
    width: 94vw;
  }

  .page-placeholder {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition: none;
  }
}