/* et book bs */
@import url("https://cdn.jsdelivr.net/gh/edwardtufte/et-book@gh-pages/et-book.css");
@import url("https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700&display=swap");
@import url("./theme.css?v=20260803-1");
@import url("./navigation.css?v=20260927-1");

/* Shared typography and layout settings */
:root {
  font-family: "et-book", Georgia, serif;
  --nav-height: 50px;
  --ide-toolbar-height: 50px;
  --ide-toolbar-height-stacked: 96px;
  --ide-toolbar-height-compact: 90px;
  --nav-inline-padding: clamp(18rem, 3vw, 20rem);
  --nav-inline-padding-mobile: 0.75rem;
  --nav-inline-padding-compact: 0.5rem;
  --nav-text-size: 0.9rem;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--background);
  background-image: none;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--background);
  background-image: none;
}

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

button {
  color: inherit;
}

:where(button, a, input):focus-visible {
  outline: none;
}

.site-header {
  position: relative;
  z-index: 10;
}

.nav-shell {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(1rem, 1fr) auto;
  align-items: center;
  width: 100%;
  min-height: var(--nav-height);
  column-gap: 0.65rem;
  padding: 0.25rem var(--nav-inline-padding);
  font-family: "Nunito", Arial, sans-serif;
  background: var(--background);
  box-shadow: none;
}

.nav-shell button,
.nav-shell input {
  font-family: inherit;
}

.brand-cluster,
.auth-actions,
.nav-account-cluster,
.primary-nav {
  display: flex;
  align-items: center;
}

.brand-cluster {
  gap: 0.7rem;
}

.nav-future {
  min-width: 0;
}

.primary-nav {
  min-width: 0;
  justify-content: flex-start;
  gap: 0.2rem;
}

.nav-account-cluster {
  justify-content: flex-end;
  gap: 0.55rem;
}

.auth-actions {
  position: relative;
  gap: 0.45rem;
}

.auth-actions[data-auth-state="loading"] .auth-button {
  visibility: hidden;
}

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

.logo,
.nav-menu-button,
.primary-nav-link,
.premium-link,
.auth-button {
  min-height: 32px;
  font-size: var(--nav-text-size);
  line-height: 1;
}

.logo {
  display: inline-flex;
  align-items: center;
  padding: 0 0.45rem;
  color: var(--ink);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-decoration: none;
  transition: color 160ms ease;
}

.logo:hover {
  color: var(--accent-bright);
}

.logo:focus-visible {
  color: var(--accent-bright);
  outline: none;
}

.nav-menu {
  position: relative;
}

.nav-menu-button {
  display: inline-flex;
  align-items: center;
  gap: 0.48rem;
  padding: 0 0.55rem;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  font-weight: 400;
  letter-spacing: 0.025em;
  background: var(--transparent);
  transition:
    color 160ms ease,
    background-color 160ms ease;
}

.nav-menu-button::after {
  width: 0.4rem;
  height: 0.4rem;
  content: "";
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-0.12rem) rotate(45deg);
  transition: transform 160ms ease;
}

.nav-menu-button:hover,
.nav-menu-button[aria-expanded="true"] {
  color: var(--accent-bright);
}

.nav-menu-button:focus-visible {
  color: var(--accent-bright);
  outline: none;
}

.nav-menu-button[aria-expanded="true"]::after {
  transform: translateY(0.12rem) rotate(225deg);
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 0.55rem);
  left: 50%;
  display: grid;
  width: 180px;
  padding: 0.4rem;
  border: 0;
  border-radius: 10px;
  visibility: hidden;
  opacity: 0;
  background: var(--surface-deep);
  transform: translateX(-50%) translateY(-6px) scale(0.985);
  transform-origin: top center;
  transition:
    opacity 150ms ease,
    transform 150ms ease,
    visibility 150ms;
}

.nav-dropdown.is-open {
  visibility: visible;
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
}

.nav-dropdown a {
  position: relative;
  padding: 0.62rem 0.72rem;
  border-radius: 6px;
  color: var(--muted);
  font-size: var(--nav-text-size);
  font-weight: 400;
  letter-spacing: 0.015em;
  text-decoration: none;
  transition:
    color 140ms ease,
    background-color 140ms ease;
}

.nav-dropdown a:hover,
.nav-dropdown a:focus-visible {
  outline: none;
  color: var(--ink);
  background: var(--surface-active);
}

.nav-dropdown a[aria-current="page"] {
  color: var(--accent-bright);
  background: var(--surface-hover);
}

.nav-dropdown a[aria-current="page"]::before {
  content: none;
}

.primary-nav-link,
.premium-link {
  display: inline-flex;
  align-items: center;
  min-width: max-content;
  padding: 0 0.55rem;
  border-radius: 6px;
  color: var(--muted);
  font-weight: 400;
  text-decoration: none;
  transition: color 150ms ease;
}

.primary-nav-link {
  letter-spacing: 0.025em;
}

.primary-nav-link:hover,
.primary-nav-link:focus-visible,
.primary-nav-link[aria-current="page"],
.nav-menu-button.is-current {
  color: var(--accent-bright);
}

.premium-link {
  padding-inline: 0.45rem;
  color: var(--accent-bright);
  font-weight: 400;
}

.premium-link:hover,
.premium-link:focus-visible,
.premium-link[aria-current="page"] {
  color: var(--ink);
}

.auth-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.72rem;
  border: 0;
  border-radius: 7px;
  cursor: pointer;
  font-weight: 400;
  color: var(--ink);
  background: var(--transparent);
  text-decoration: none;
  transition:
    color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease;
}

.auth-button:hover,
.auth-button:focus-visible {
  outline: none;
  background: var(--surface-hover);
}

.auth-button:active {
  transform: translateY(1px);
}

.sign-up {
  color: var(--ink);
  background: var(--transparent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.sign-up:hover,
.sign-up:focus-visible {
  color: var(--accent-bright);
  background: var(--surface-hover);
  box-shadow: inset 0 0 0 1px var(--accent-bright);
}

.profile-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  min-width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  background: var(--transparent);
  transition:
    color 150ms ease,
    background-color 150ms ease,
    box-shadow 150ms ease,
    transform 150ms ease;
}

.profile-button:hover,
.profile-button:focus-visible,
.profile-button[aria-expanded="true"] {
  color: var(--accent-bright);
}

.profile-button:active {
  transform: translateY(1px);
}

.profile-button {
  border-radius: 50%;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 400;
  background: var(--surface-active);
}

.profile-button[hidden],
.account-menu[hidden] {
  display: none;
}

.account-menu {
  position: absolute;
  top: calc(100% + 0.55rem);
  right: 0;
  z-index: 20;
  display: grid;
  width: 168px;
  padding: 0.4rem;
  border-radius: 9px;
  background: var(--surface-deep);
  box-shadow: 0 16px 36px var(--shadow);
}

.account-menu-item {
  display: flex;
  width: 100%;
  min-height: 35px;
  align-items: center;
  padding: 0 0.65rem;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 400;
  text-align: left;
  background: var(--transparent);
  text-decoration: none;
}

.account-menu-item:hover,
.account-menu-item:focus-visible {
  color: var(--ink);
  background: var(--surface-hover);
}

.account-menu-divider {
  height: 1px;
  margin: 0.35rem 0.45rem;
  background: var(--subtle);
  opacity: 0.45;
}

.account-sign-out {
  color: var(--error);
}

.account-sign-out:hover,
.account-sign-out:focus-visible {
  color: var(--error);
}

.account-sign-out:disabled {
  cursor: wait;
  opacity: 0.55;
}

.home-main {
  min-height: calc(100vh - var(--nav-height));
}

.mode-main {
  display: grid;
  min-height: calc(100vh - var(--nav-height));
  padding: 3rem 1.25rem;
  place-items: center;
}

.mode-message {
  width: min(600px, 100%);
  margin: 0;
  padding: 1.45rem 1.7rem;
  border: 0;
  border-radius: 12px;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  line-height: 1.55;
  text-align: center;
  background: var(--surface);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  :root {
    --nav-text-size: 0.78rem;
  }

  .nav-shell {
    padding: 0.2rem var(--nav-inline-padding-mobile);
  }

  .brand-cluster {
    gap: 0.25rem;
  }

  .primary-nav {
    flex-wrap: wrap;
    row-gap: 0.15rem;
  }

  .nav-account-cluster {
    gap: 0.25rem;
  }

  .auth-actions {
    gap: 0.25rem;
  }

  .logo,
  .nav-menu-button,
  .primary-nav-link,
  .premium-link,
  .auth-button {
    min-height: 29px;
  }

  .logo {
    padding-inline: 0.3rem;
  }

  .nav-menu-button {
    gap: 0.36rem;
    padding-inline: 0.38rem;
  }

  .auth-button {
    padding-inline: 0.48rem;
  }

  .profile-button {
    width: 29px;
    min-width: 29px;
    height: 29px;
  }

  .nav-dropdown {
    width: min(180px, calc(100vw - 1rem));
  }


}

@media (max-width: 380px) {
  .nav-shell {
    grid-template-columns: auto 1fr auto;
    padding-inline: var(--nav-inline-padding-compact);
  }

  .logo {
    letter-spacing: 0.07em;
  }

  .auth-button {
    padding-inline: 0.4rem;
  }


}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}