:root {
  --color-accent: #d96c3b;
  --color-background: #f5f0e8;
  --color-surface: #ffffff;
  --color-muted: #7b756c;
  --color-border: #ded6ca;
  --color-text-primary: #181a1b;
  --font-sans: "Plus Jakarta Sans", "Segoe UI", sans-serif;
  --font-display: "Noto Serif", Georgia, serif;
  --keycap-top: #fffaf4;
  --keycap-base: #ebe3d7;
  --keycap-side: #cec4b7;
  --keycap-shadow: rgba(24, 26, 27, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
}

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

.key-button,
button,
input[type="submit"],
input[type="button"],
input[type="reset"] {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0.8rem 1.35rem 0.95rem;
  border: none;
  border-radius: 0.95rem;
  background:
    linear-gradient(180deg, var(--keycap-top) 0%, #f4ece1 100%);
  box-shadow:
    0 0.42rem 0 0 var(--keycap-side),
    0 0.85rem 1.25rem -0.7rem var(--keycap-shadow);
  color: var(--color-text-primary);
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 0.14s ease,
    box-shadow 0.14s ease,
    border-color 0.14s ease,
    color 0.14s ease,
    background 0.14s ease;
}

.key-button::before,
button::before,
input[type="submit"]::before,
input[type="button"]::before,
input[type="reset"]::before {
  content: "";
  position: absolute;
  inset: 0.28rem 0.32rem 0.56rem;
  border-radius: 0.7rem;
  background: linear-gradient(180deg, #fffdf9 0%, #efe5d9 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  z-index: 0;
}

.key-button > *,
.key-button > span,
button > *,
input[type="submit"],
input[type="button"],
input[type="reset"] {
  position: relative;
  z-index: 1;
}

.key-button:hover,
.key-button:focus-visible,
button:hover,
button:focus-visible,
input[type="submit"]:hover,
input[type="submit"]:focus-visible,
input[type="button"]:hover,
input[type="button"]:focus-visible,
input[type="reset"]:hover,
input[type="reset"]:focus-visible {
  border-color: #af9b88;
  color: var(--color-accent);
}

.key-button:active,
button:active,
input[type="submit"]:active,
input[type="button"]:active,
input[type="reset"]:active {
  transform: translateY(0.3rem);
  box-shadow:
    0 0.14rem 0 0 var(--keycap-side),
    0 0.45rem 0.8rem -0.65rem var(--keycap-shadow);
}

.key-button:focus-visible,
button:focus-visible,
input[type="submit"]:focus-visible,
input[type="button"]:focus-visible,
input[type="reset"]:focus-visible {
  outline: 2px solid rgba(217, 108, 59, 0.4);
  outline-offset: 4px;
}

.key-button--accent,
button.key-button--accent,
input[type="submit"].key-button--accent,
input[type="button"].key-button--accent,
input[type="reset"].key-button--accent {
  background: linear-gradient(180deg, #e68555 0%, var(--color-accent) 100%);
  box-shadow:
    0 0.42rem 0 0 #b85b32,
    0 0.85rem 1.25rem -0.7rem rgba(217, 108, 59, 0.35);
  color: var(--color-surface);
}

.key-button--accent::before,
button.key-button--accent::before,
input[type="submit"].key-button--accent::before,
input[type="button"].key-button--accent::before,
input[type="reset"].key-button--accent::before {
  background: linear-gradient(180deg, #eca17a 0%, #da7547 100%);
  box-shadow: inset 0 1px 0 rgba(255, 240, 231, 0.55);
}

.key-button--accent:hover,
.key-button--accent:focus-visible,
button.key-button--accent:hover,
button.key-button--accent:focus-visible,
input[type="submit"].key-button--accent:hover,
input[type="submit"].key-button--accent:focus-visible,
input[type="button"].key-button--accent:hover,
input[type="button"].key-button--accent:focus-visible,
input[type="reset"].key-button--accent:hover,
input[type="reset"].key-button--accent:focus-visible {
  color: var(--color-surface);
}

.site-header {
  padding: 1.5rem 2rem;
  background: var(--color-background);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-right: 1rem;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  border: 0;
}

.site-nav__link {
  color: var(--color-muted);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: color 0.2s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-text-primary);
}

.site-main {
  padding: 1.5rem 2rem 2rem;
}

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

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-logo--footer img {
  display: block;
  width: 10rem;
  height: auto;
}

.site-footer__content {
  display: grid;
  justify-items: end;
  gap: 0.75rem;
}

.site-footer__nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-footer__meta {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.95rem;
  text-align: right;
}

@media (max-width: 640px) {
  .site-header {
    padding: 1.25rem 1rem;
  }

  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
    padding-right: 0;
  }

  .site-nav {
    gap: 1rem;
    flex-wrap: wrap;
  }

  .site-main {
    padding: 1rem 1rem 1.5rem;
  }

  .site-footer {
    padding: 1.5rem 1rem;
  }

  .site-footer__inner,
  .site-footer__content {
    justify-items: start;
    align-items: flex-start;
  }

  .site-footer__inner {
    flex-direction: column;
  }

  .site-footer__nav,
  .site-footer__meta {
    justify-content: flex-start;
    text-align: left;
  }
}