/*****************
TOKENS
******************/

:root {
  /* The logo artwork sits on pure black — do not tint panels behind it. */
  --clr-base: #000000;
  --clr-base-2: #0b0909;
  --clr-base-3: #141010;
  /* Borders and decorative rules only, never a text colour. */
  --clr-line: #2a2020;
  /* Sampled from the logo. Fills only — fails 4.5:1 as small text. */
  --clr-accent: #a2100d;
  /* Button hover; keeps a white label at 6:1. */
  --clr-accent-lit: #c4160f;
  /* The only red that passes 4.5:1 as text on black. */
  --clr-accent-text: #ef4136;
  --clr-contrast: #e8ddc9;
  --clr-contrast-muted: #9a8f85;
  --clr-white: #ffffff;

  --font-display: Oswald, Haettenschweiler, Impact, sans-serif;
  --font-sans: Inter, Roboto, "Helvetica Neue", "Arial Nova", "Nimbus Sans", Arial, sans-serif;

  --font-size--xx-small: 0.625rem;
  --font-size--x-small: 0.6875rem;
  --font-size--small: 0.8125rem;
  --font-size--medium: 0.875rem;
  --font-size--large: 1rem;

  --radius: 0.125rem;
  --header-height: 4.3125rem;
  --gutter: clamp(1.25rem, 4vw, 2rem);
  --section-space: clamp(5rem, 9vw, 7rem);
  --width-page: 72rem;
  --width-wide: 80rem;
  --width-prose: 48rem;
}

/* Variable font: one file covers the whole 200-700 range, so weights 300 and
   500 come from the same download. Latin subset only. */
@font-face {
  font-family: "Oswald";
  font-style: normal;
  font-weight: 200 700;
  font-display: swap;
  src: url("fonts/oswald-latin-var.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

/*****************
RESET
******************/

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  scroll-behavior: smooth;

  @media (prefers-reduced-motion: reduce) {
    scroll-behavior: auto;
  }
}

body {
  background: var(--clr-base);
  color: var(--clr-contrast);
  font-family: var(--font-sans);
  font-size: var(--font-size--large);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
button { cursor: pointer; background: none; border: none; color: inherit; font: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
h1, h2, h3 { font-weight: 400; }

:focus-visible { outline: 2px solid var(--clr-accent-text); outline-offset: 3px; }

/*****************
SHARED
******************/

.wrap {
  margin-inline: auto;
  max-inline-size: var(--width-page);
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-space);
  scroll-margin-block-start: var(--header-height);
}

/* Small uppercase label with wide tracking — the page's recurring accent. */
.tracked { letter-spacing: 0.18em; text-transform: uppercase; }

.eyebrow {
  color: var(--clr-accent-text);
  font-size: var(--font-size--xx-small);
}

.heading {
  font-family: var(--font-display);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  line-height: 1.25;
  font-size: clamp(1.9rem, 5vw, 3rem);
  margin-block-start: 1rem;
}

.hairline {
  block-size: 1px;
  background: linear-gradient(to right, transparent, var(--clr-accent), transparent);
}

.prose { color: var(--clr-contrast-muted); line-height: 1.625; }

.btn {
  display: inline-block;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.875rem 1.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: background-color 0.2s, border-color 0.2s;

  &.is-filled {
    background: var(--clr-accent);
    color: var(--clr-white);

    &:hover { background: var(--clr-accent-lit); }
  }

  &.is-outline {
    border-color: var(--clr-line);
    color: var(--clr-contrast);

    &:hover { border-color: var(--clr-contrast-muted); }
  }
}

/*****************
HEADER
******************/

.header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 40;
  border-block-end: 1px solid var(--clr-line);
  background: color-mix(in srgb, var(--clr-base) 90%, transparent);
  backdrop-filter: blur(8px);
}

.header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.75rem;
}

.header__brand { display: flex; align-items: center; gap: 0.75rem; }
.header__mark { inline-size: 2.75rem; block-size: 2.75rem; flex-shrink: 0; }
.header__names { line-height: 1; }

.header__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(0.9375rem, 2.5vw, 1.0625rem);
}

.header__tagline {
  display: block;
  margin-block-start: 0.25rem;
  font-size: 0.5625rem;
  color: var(--clr-contrast-muted);
}

.nav {
  display: none;
  align-items: center;
  gap: 2rem;
  font-size: 0.875rem;
  color: var(--clr-contrast-muted);

  & a {
    transition: color 0.2s;

    &:hover { color: var(--clr-contrast); }
  }

  @media (width >= 64rem) {
    display: flex;
  }
}

.nav-toggle {
  border: 1px solid var(--clr-line);
  border-radius: var(--radius);
  padding: 0.5rem;
  display: grid;

  @media (width >= 64rem) {
    display: none;
  }
}

.nav-mobile {
  border-block-start: 1px solid var(--clr-line);
  background: var(--clr-base-2);
  padding: 1rem var(--gutter);

  & nav { display: flex; flex-direction: column; }

  & a {
    border-block-end: 1px solid var(--clr-line);
    padding-block: 0.75rem;
    color: var(--clr-contrast-muted);
  }

  @media (width >= 64rem) {
    display: none;
  }
}

/*****************
HERO
******************/

.hero {
  padding-block-start: var(--header-height);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  align-items: center;
  gap: 2.5rem;
  margin-inline: auto;
  max-inline-size: var(--width-wide);
  padding-inline: var(--gutter);
  padding-block: clamp(3.5rem, 6vw, 5rem);

  @media (width >= 64rem) {
    grid-template-columns: 1fr minmax(0, 32.5rem);
    gap: 4rem;
  }
}

/* The logo is the h1 on desktop but reads second on a phone, where the knife
   photograph is the stronger opener. */
.hero__copy { order: 2; }
.hero__figure { order: 1; }

@media (width >= 64rem) {
  .hero__copy { order: 1; }
  .hero__figure { order: 2; }
}

.hero__logo {
  inline-size: 100%;
  max-inline-size: 18.75rem;

  @media (width >= 40rem) {
    max-inline-size: 23.75rem;
  }
}

.hero__lede {
  margin-block-start: 2rem;
  max-inline-size: 32rem;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.8rem, 4.4vw, 2.9rem);
  text-transform: uppercase;
  line-height: 1.1;
  letter-spacing: 0.025em;
}

.hero__body { margin-block-start: 1.5rem; max-inline-size: 28rem; }

.hero__actions {
  margin-block-start: 2.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.hero__photo {
  margin-inline: auto;
  inline-size: auto;
  max-block-size: 70vh;

  @media (width >= 64rem) {
    max-block-size: 78vh;
  }
}

/*****************
AVAILABILITY STRIP
******************/

.strip {
  border-block: 1px solid var(--clr-line);
  background: var(--clr-base-2);
}

.strip__grid {
  display: grid;
  gap: 1rem;
  padding-block: 1.5rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--clr-contrast-muted);

  @media (width >= 40rem) {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;

    & > :nth-child(2) { border-inline: 1px solid var(--clr-line); }
  }
}

/*****************
THE KNIFE
******************/

.knife__intro { margin-inline: auto; max-inline-size: 32rem; text-align: center; }
.knife__intro .heading { font-size: clamp(2rem, 5.5vw, 3.4rem); line-height: 1; }
.knife__rule { margin: 1.75rem auto 0; inline-size: 10rem; }

.knife__grid {
  margin-block-start: 3.5rem;
  display: grid;
  align-items: start;
  gap: 3rem;

  @media (width >= 64rem) {
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
  }
}

.knife__frame {
  background: var(--clr-base-3);
  padding: clamp(1.25rem, 3vw, 2rem);

  & img { margin-inline: auto; inline-size: auto; max-block-size: 38.75rem; }
}

.knife__price {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 3rem;
  line-height: 1;
}

.knife__ships { margin-block-start: 0.5rem; font-size: var(--font-size--small); color: var(--clr-contrast-muted); }
.knife__divider { margin-block: 2rem; }

.spec {
  margin-block-start: 2rem;
  border-block: 1px solid var(--clr-line);
  font-size: var(--font-size--medium);

  & > div {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    padding-block: 0.875rem;

    & + div { border-block-start: 1px solid var(--clr-line); }
  }

  & dt { color: var(--clr-contrast-muted); }
}

.spec__flag { color: var(--clr-accent-text); }

.knife__note {
  margin-block-start: 2rem;
  border-inline-start: 2px solid var(--clr-accent);
  padding-inline-start: 1.25rem;
  font-size: 0.9375rem;
}

.details {
  margin-block-start: 4rem;
  display: grid;
  gap: 1rem;

  @media (width >= 40rem) {
    grid-template-columns: repeat(3, 1fr);
  }
}

.details img { inline-size: 100%; aspect-ratio: 1; object-fit: cover; background: var(--clr-base-3); }

.details figcaption {
  margin-block-start: 0.75rem;
  font-size: var(--font-size--xx-small);
  color: var(--clr-contrast-muted);
}

/*****************
ORDERING
******************/

.ordering {
  border-block: 1px solid var(--clr-line);
  background: var(--clr-base-2);
}

.ordering__intro { max-inline-size: var(--width-prose); }
.ordering__intro .prose { margin-block-start: 1.5rem; }

.steps {
  margin-block-start: 3.5rem;
  display: grid;
  gap: 2.5rem;

  @media (width >= 40rem) {
    grid-template-columns: repeat(2, 1fr);
  }

  @media (width >= 64rem) {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step {
  border-block-start: 1px solid var(--clr-line);
  padding-block-start: 1.5rem;
}

.step__num {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.875rem;
  line-height: 1.2;
  color: var(--clr-accent-text);
}

.step__title {
  margin-block-start: 0.75rem;
  font-size: var(--font-size--small);
  font-weight: 600;
}

.step__body {
  margin-block-start: 0.5rem;
  font-size: var(--font-size--medium);
  line-height: 1.625;
  color: var(--clr-contrast-muted);
}

/*****************
MAKER
******************/

.maker__grid {
  display: grid;
  align-items: center;
  gap: 3rem;

  @media (width >= 64rem) {
    grid-template-columns: minmax(0, 21.25rem) 1fr;
    gap: 5rem;
  }
}

.maker__photo {
  margin-inline: auto;
  inline-size: 100%;
  max-inline-size: 17.5rem;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--clr-base-3);

  @media (width >= 64rem) {
    max-inline-size: none;
  }
}

.maker__grid .heading { font-size: clamp(1.9rem, 5vw, 2.9rem); }
.maker__grid .prose { margin-block-start: 1.5rem; }
.maker__grid .prose + .prose { margin-block-start: 1rem; }

/*****************
FAQ
******************/

.faq {
  border-block: 1px solid var(--clr-line);
  background: var(--clr-base-2);
}

.faq__inner { margin-inline: auto; max-inline-size: var(--width-prose); text-align: center; }
.faq__list { margin-block-start: 3rem; border-block: 1px solid var(--clr-line); text-align: start; }

.faq__item + .faq__item { border-block-start: 1px solid var(--clr-line); }

.faq__item summary {
  display: flex;
  cursor: pointer;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.5rem;
  font-size: 1.0625rem;
  font-weight: 500;
  list-style: none;

  &::-webkit-details-marker { display: none; }
}

.faq__plus {
  flex-shrink: 0;
  font-size: 1.5rem;
  /* Taller than the label text, so this drives the closed row height. */
  line-height: 2rem;
  font-weight: 300;
  color: var(--clr-accent-text);
  transition: transform 0.2s;
}

.faq__item[open] .faq__plus { transform: rotate(45deg); }

.faq__answer {
  padding-block-end: 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.625;
  color: var(--clr-contrast-muted);

  & p + p { margin-block-start: 0.75rem; }
  & strong { color: var(--clr-contrast); font-weight: 600; }
}

/*****************
FOOTER
******************/

.footer { border-block-start: 1px solid var(--clr-line); }

.footer__grid {
  display: grid;
  gap: 2.5rem;
  padding-block: 3.5rem;

  @media (width >= 64rem) {
    grid-template-columns: 1.5fr 1fr;
  }
}

.footer__logo { inline-size: 10rem; }
.footer__blurb { margin-block-start: 1.25rem; max-inline-size: 20rem; font-size: var(--font-size--medium); }

.footer__label {
  margin-block-end: 1rem;
  font-size: var(--font-size--xx-small);
  color: var(--clr-contrast-muted);
}

.footer__links {
  display: grid;
  gap: 0.625rem;
  font-size: var(--font-size--medium);
  color: var(--clr-contrast-muted);

  & a {
    transition: color 0.2s;

    &:hover { color: var(--clr-contrast); }
  }
}

.footer__place { padding-block-start: 0.5rem; }

.footer__legal { border-block-start: 1px solid var(--clr-line); }

.footer__legal-inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-block: 1.25rem;
  font-size: 0.75rem;
  color: var(--clr-contrast-muted);

  @media (width >= 40rem) {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}