* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--color-page);
  color: var(--color-ink);
  font-family: var(--font-ui);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(255, 238, 241, 0.56), transparent 28%),
    var(--color-page);
}

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

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

button:focus-visible,
a:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--color-focus) 42%, transparent);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  min-height: var(--header-height);
  border-bottom: var(--card-border-width) solid var(--color-border);
  background: color-mix(in srgb, var(--color-page) 94%, transparent);
  box-shadow: var(--shadow-header);
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  width: min(100%, calc(var(--content-max-width) + (var(--page-gutter) * 2)));
  min-height: var(--header-height);
  align-items: center;
  gap: var(--card-gap);
  margin: 0 auto;
  padding: 0 var(--page-gutter);
}

.site-logo {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 20px;
}

.site-logo::before {
  width: 18px;
  height: 2px;
  background: var(--color-accent);
  content: "";
}

.site-nav {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-self: stretch;
  align-items: stretch;
  gap: 4px;
}

.mobile-nav-toggle {
  display: none;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.025em;
  white-space: nowrap;
}

.site-nav__link::after {
  position: absolute;
  right: 10px;
  bottom: 11px;
  left: 10px;
  height: 2px;
  background: var(--color-accent);
  content: "";
  opacity: 0;
  transform: scaleX(0.35);
  transition: opacity 160ms ease, transform 160ms ease;
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
}

.site-header__account {
  position: relative;
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
}

.auth-popover[hidden] {
  display: none;
}

.auth-popover [hidden] {
  display: none !important;
}

.auth-popover {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: min(300px, calc(100vw - (var(--mobile-page-gutter) * 2)));
  padding: 18px;
  border: var(--card-border-width) solid var(--color-border);
  border-radius: var(--card-radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.auth-popover__eyebrow {
  margin: 0 0 7px;
  color: var(--color-accent);
  font-size: var(--eyebrow-size);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.auth-popover__title {
  display: block;
  overflow: hidden;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.auth-popover__detail,
.auth-popover__message {
  margin: 7px 0 0;
  overflow-wrap: anywhere;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.5;
}

.auth-popover__login {
  margin-top: 16px;
}

.auth-popover__logout {
  margin-top: 14px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.auth-popover__message:empty {
  display: none;
}

.page-shell {
  width: min(100%, calc(var(--content-max-width) + (var(--page-gutter) * 2)));
  margin: 0 auto;
  padding: var(--card-gap) var(--page-gutter) calc(var(--card-gap) * 3);
}

.page-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(280px, 0.42fr);
  gap: calc(var(--card-gap) * 2);
  align-items: end;
  padding: calc(var(--hero-padding-block) * 0.7) var(--title-start-offset) calc(var(--hero-padding-block) * 0.62);
}

.page-workspace {
  display: flex;
  align-items: stretch;
  gap: var(--panel-gap);
}

.page-workspace__input {
  width: var(--input-panel-width);
}

.page-workspace__result {
  width: var(--result-panel-width);
}

.page-footer {
  width: min(100%, calc(var(--content-max-width) + (var(--page-gutter) * 2)));
  margin: 0 auto;
  padding: var(--card-gap) var(--page-gutter) calc(var(--card-gap) * 2);
  border-top: var(--card-border-width) solid var(--color-border);
  color: var(--color-muted);
  font-size: 12px;
}

.is-mobile .site-header__inner {
  flex-wrap: wrap;
  gap: 0 12px;
  padding: 10px var(--mobile-page-gutter);
}

.is-mobile .site-logo {
  min-height: 42px;
}

.is-mobile .mobile-nav-toggle {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 0 11px;
  border: var(--card-border-width) solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.is-mobile .mobile-nav-toggle__icon {
  display: grid;
  width: 14px;
  gap: 3px;
}

.is-mobile .mobile-nav-toggle__icon span {
  display: block;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform var(--motion-fast) ease, opacity var(--motion-fast) ease;
}

.is-mobile .mobile-nav-toggle[aria-expanded="true"] .mobile-nav-toggle__icon span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

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

.is-mobile .mobile-nav-toggle[aria-expanded="true"] .mobile-nav-toggle__icon span:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

.is-mobile .site-header__account {
  margin-left: 0;
}

.is-mobile .site-nav {
  display: none;
  order: 3;
  width: 100%;
  flex: 1 0 100%;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  margin-top: 10px;
  padding: 8px;
  border: var(--card-border-width) solid var(--color-border);
  border-radius: var(--button-radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.is-mobile .site-nav[data-open="true"] {
  display: grid;
}

.is-mobile .site-nav__link {
  min-height: 38px;
  justify-content: flex-start;
  padding: 0 10px;
  border-radius: 8px;
}

.is-mobile .site-nav__link::after {
  right: 10px;
  bottom: 3px;
  left: 10px;
}

.is-mobile .page-shell {
  padding: var(--panel-gap) var(--mobile-page-gutter) calc(var(--card-gap) * 2);
}

.is-mobile .page-intro {
  grid-template-columns: 1fr;
  gap: 14px;
  padding: calc(var(--hero-padding-block) * 0.62) var(--title-start-offset) calc(var(--hero-padding-block) * 0.5);
}

.is-mobile .page-workspace {
  flex-direction: column;
}

.is-mobile .page-workspace__input,
.is-mobile .page-workspace__result {
  width: 100%;
}

.is-mobile .page-footer {
  padding-right: var(--mobile-page-gutter);
  padding-left: var(--mobile-page-gutter);
}