/* Shared shell: reset, header, buttons, footer, search modal. */

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--body);
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

code,
pre {
  font-family: var(--mono);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--bg);
  z-index: 20;
}

.skip-link:focus {
  left: 0;
}

/* ------------------------------------------------------------------ header */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.7rem var(--gutter);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--motion-base) var(--ease-standard);
}

.nav.is-scrolled,
.nav--solid {
  border-bottom-color: var(--line);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.nav__brand img {
  border-radius: 7px;
}

.nav__links {
  display: flex;
  gap: 1.4rem;
  margin-left: auto;
  font-size: var(--small);
  color: var(--muted);
}

.nav__links a:hover {
  color: var(--ink);
  text-decoration: none;
}

.nav__links a[aria-current="page"] {
  color: var(--accent-text);
  font-weight: 550;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav__actions--end {
  margin-left: auto;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 980px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  transition: color var(--motion-fast) var(--ease-standard),
    border-color var(--motion-fast) var(--ease-standard);
}

.icon-button:hover {
  color: var(--ink);
  border-color: var(--line-strong);
}

.icon-button svg {
  width: 1rem;
  height: 1rem;
}

.nav__cta {
  font-size: var(--small);
  font-weight: 550;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--accent);
  border-radius: 980px;
  color: var(--accent-text);
}

.nav__cta:hover {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}

[data-theme="dark"] .nav__cta:hover {
  color: var(--green-900);
}

@media (max-width: 720px) {
  .nav__links {
    display: none;
  }
}

/* ---------------------------------------------------------------- buttons */

.button {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.4rem;
  border-radius: 980px;
  border: 1px solid var(--line);
  font-size: var(--small);
  font-weight: 550;
  transition: transform var(--motion-fast) var(--ease-standard),
    background-color var(--motion-fast) var(--ease-standard),
    border-color var(--motion-fast) var(--ease-standard);
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.button--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.button--primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

[data-theme="dark"] .button--primary {
  color: var(--green-900);
}

/* ---------------------------------------------------------------- footer */

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 1.6rem var(--gutter) 2.4rem;
  border-top: 1px solid var(--line);
  font-size: var(--small);
  color: var(--muted);
}

.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--ink);
}

.footer__brand img {
  border-radius: 6px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin-left: auto;
}

/* ----------------------------------------------------------- search modal */

.search-dialog {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  background: rgba(23, 35, 29, 0.35);
  backdrop-filter: blur(3px);
}

.search-dialog.is-open {
  display: block;
}

.search-dialog__panel {
  max-width: 40rem;
  margin: 8vh auto 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.search-dialog__field {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.search-dialog__field input {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: var(--small);
}

.search-dialog__results {
  max-height: 55vh;
  margin: 0;
  padding: 0.4rem;
  list-style: none;
  overflow-y: auto;
}

.search-dialog__results li a {
  display: block;
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
}

.search-dialog__results li a:hover,
.search-dialog__results li a.is-active {
  background: var(--accent-faint);
  text-decoration: none;
}

.search-dialog__results strong {
  display: block;
  font-size: var(--small);
  font-weight: 550;
}

.search-dialog__results span {
  color: var(--muted);
  font-size: var(--micro);
}

.search-dialog__empty {
  padding: 1rem 1.1rem;
  color: var(--muted);
  font-size: var(--small);
}

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