/*
 * Lunomi's public pages.
 *
 * One stylesheet, no build step, no dependencies. The palette is the app's own
 * (constants/theme.ts in the Lunomi repository), so somebody arriving here from
 * the Play Store listing sees the same colours they saw on their phone.
 *
 * Everything is sized in rem and the layout is a single column, which is what
 * makes "mobile-friendly" true without a media query for it: the page is
 * already the shape of a phone, and a wide screen simply stops it growing.
 */

:root {
  --background: #f4f2fb;
  --surface: #ffffff;
  --text: #1e1b2e;
  --muted: #635e7a;
  --accent: #6d5ae6;
  --accent-dark: #5847c9;
  --accent-soft: #e7e3fb;
  --border: #e4e0f5;
  --radius: 14px;
  --measure: 44rem;
}

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

html {
  /* Anchored headings do not hide under the header on a jump from the nav. */
  scroll-padding-top: 1.5rem;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  /*
   * The reader's own system font. No web font is loaded, which keeps the site
   * to two requests and means nothing here can call out to another server.
   */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

/* ---------------------------------------------------------------- layout -- */

.wrap {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 1.25rem;
}

main {
  padding: 2rem 0 3rem;
}

/* Somewhere for a keyboard to land before the navigation. */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius) 0;
  z-index: 2;
}

.skip:focus {
  left: 0;
}

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

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}

/*
 * The app's own icon, at the size a header wants it.
 *
 * Rounded the way Android and iOS round it on a home screen, so the mark here
 * is recognisably the thing somebody tapped to open Lunomi.
 */
.brand .mark {
  display: block;
  width: 30px;
  height: 30px;
  border-radius: 7px;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
}

nav a:hover,
nav a:focus {
  color: var(--accent);
  text-decoration: underline;
}

/* The page you are already on is marked rather than linked away from. */
nav a[aria-current="page"] {
  color: var(--accent);
}

/* ---------------------------------------------------------------- typing -- */

h1 {
  font-size: 1.85rem;
  line-height: 1.25;
  margin: 0 0 0.6rem;
}

h2 {
  font-size: 1.2rem;
  line-height: 1.35;
  margin: 2.2rem 0 0.6rem;
}

h3 {
  font-size: 1.02rem;
  margin: 1.5rem 0 0.4rem;
}

p,
ul,
ol {
  margin: 0 0 1rem;
}

ul,
ol {
  padding-left: 1.3rem;
}

li {
  margin-bottom: 0.35rem;
}

a {
  color: var(--accent-dark);
}

a:hover,
a:focus {
  color: var(--accent);
}

.lede {
  font-size: 1.1rem;
  color: var(--muted);
}

.updated {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

.note {
  color: var(--muted);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------- pieces --- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 0.5rem;
  margin: 0 0 1.25rem;
}

.card h2,
.card h3 {
  margin-top: 0;
}

/* The three doors on the home page. */
.links {
  display: grid;
  gap: 0.9rem;
  padding: 0;
  margin: 1.5rem 0 0;
  list-style: none;
}

.links a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  text-decoration: none;
  color: var(--text);
}

.links a:hover,
.links a:focus {
  border-color: var(--accent);
}

.links strong {
  display: block;
  font-size: 1.05rem;
  color: var(--accent-dark);
}

.links span {
  color: var(--muted);
  font-size: 0.95rem;
}

/* A real link that looks like a button; it needs no script to work. */
.button {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  padding: 0.8rem 1.35rem;
  border-radius: 999px;
  margin: 0.25rem 0 1rem;
}

.button:hover,
.button:focus {
  background: var(--accent-dark);
  color: #fff;
}

.email {
  font-weight: 700;
  word-break: break-word;
}

/* Long email addresses and code-ish strings must not push the page sideways. */
code {
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 0.1rem 0.35rem;
  font-size: 0.92em;
  word-break: break-word;
}

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

footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.5rem 0;
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  list-style: none;
  margin: 0 0 0.6rem;
  padding: 0;
}

footer p {
  margin: 0.35rem 0 0;
}

/* ---------------------------------------------------------------- wider --- */

@media (min-width: 40rem) {
  h1 {
    font-size: 2.15rem;
  }

  main {
    padding: 3rem 0 4rem;
  }
}

/*
 * The account-deletion form.
 *
 * The only page with a form on it, and the only one with script: everything
 * else here is a document. It holds two fields and a confirmation, and it has
 * to be readable by somebody who has just lost access to something.
 */
#deletion-form {
  display: grid;
  gap: 0.4rem;
  margin: 1.2rem 0 0.4rem;
}

#deletion-form label {
  font-weight: 600;
  font-size: 0.95rem;
}

#deletion-form input {
  font: inherit;
  padding: 0.6rem 0.7rem;
  border: 2px solid #d8d4cc;
  border-radius: 8px;
  background: #fff;
  margin-bottom: 0.6rem;
}

#deletion-form input:focus {
  outline: none;
  border-color: #6b5bd6;
}

/* The code is read off paper and typed back, so the groups must line up. */
#code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.04em;
}

button.button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: none;
}

/* Destructive, and dressed as such: nobody should reach for this by accident. */
.button.danger {
  background: #b3261e;
}

.button.quiet {
  background: transparent;
  color: #4a4a4a;
  text-decoration: underline;
}

.warn {
  color: #b3261e;
}

.good {
  color: #1b6b3a;
}

[hidden] {
  display: none !important;
}