/*
 * KassenKnoten — the landing page's stylesheet.
 *
 * "Papier & Tinte", the same tokens the application uses, written out as plain hex so the
 * page needs no build step and no framework. Shared by the English and the German page:
 * two copies of four hundred lines of CSS is two pages that drift apart.
 */
/*
       * "Papier & Tinte" — the same tokens the application uses, written out as plain
       * hex so this page needs no build step and no framework. A landing page that
       * depends on `npm run build` is a landing page that breaks silently six months
       * after anyone last touched it.
       */
:root {
  --canvas: #f6f3ee;
  --surface: #fefdfb;
  --surface-muted: #efebe3;
  --ink: #1a1e27;
  --ink-muted: #5c6270;
  --line: #e0dcd3;
  --rule: rgba(0, 0, 0, 0.045);
  --brass: #e4a249;
  --brass-ink: #40290b;
  --positive: #1e8f6a;
  --member-1: #008aa3;
  --member-2: #b6498d;
  --shadow: 0 1px 2px rgba(26, 30, 39, 0.04), 0 12px 32px rgba(26, 30, 39, 0.06);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #16181d;
    --surface: #1e2128;
    --surface-muted: #262a32;
    --ink: #f2efe9;
    --ink-muted: #a2a8b4;
    --line: #333843;
    --rule: rgba(255, 255, 255, 0.035);
    --brass: #edb765;
    --brass-ink: #2a1c07;
    --positive: #4cc39a;
    --member-1: #2ab3cc;
    --member-2: #d874ae;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family:
    "Manrope",
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-family: "Bricolage Grotesque", "Manrope", ui-sans-serif, system-ui, sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
  text-wrap: pretty;
}

a {
  color: inherit;
}

/* Money is set in a monospaced face with tabular figures, exactly as in the app. */
.num {
  font-family: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.wrap {
  width: min(100% - 2.5rem, 1140px);
  margin-inline: auto;
}

section {
  padding-block: clamp(3.5rem, 9vw, 7rem);
}

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.875rem;
}

.lede {
  color: var(--ink-muted);
  font-size: clamp(1.0625rem, 1.6vw, 1.1875rem);
  max-width: 62ch;
}

/* ---------------------------------------------------------------- hero */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(3rem, 8vw, 6rem) clamp(2rem, 5vw, 3rem);
}

/*
       * The one texture the design allows: a faint hairline rule, masked to fade at the
       * edges. It appears behind full-page moments in the app, and this is one.
       */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--rule) 0 1px,
    transparent 1px 2.25rem
  );
  -webkit-mask-image: radial-gradient(
    ellipse 80% 70% at 50% 30%,
    #000 40%,
    transparent 100%
  );
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 100%);
  pointer-events: none;
}

.hero .wrap {
  position: relative;
}

.hero-mark {
  width: 76px;
  height: 76px;
  display: block;
}

.hero h1 {
  font-size: clamp(2.75rem, 7.5vw, 4.75rem);
  margin-top: 1.75rem;
}

.hero .claim {
  font-family: "Bricolage Grotesque", "Manrope", sans-serif;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-top: 1rem;
  max-width: 24ch;
}

.hero .lede {
  margin-top: 1.25rem;
  font-size: clamp(1.0625rem, 1.8vw, 1.25rem);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding-inline: 1.375rem;
  border-radius: 0.875rem;
  border: 1px solid transparent;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition:
    transform 0.15s ease,
    opacity 0.15s ease,
    background-color 0.15s ease;
}

.button:active {
  transform: scale(0.99);
}

.button--primary {
  background: var(--brass);
  color: var(--brass-ink);
}

.button--primary:hover {
  opacity: 0.9;
}

.button--ghost {
  background: var(--surface);
  border-color: var(--line);
  color: var(--ink);
}

.button--ghost:hover {
  background: var(--surface-muted);
}

/* ------------------------------------------------------------- facts */

.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2.25rem;
  margin-top: 2.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 0.9375rem;
}

.facts strong {
  color: var(--ink);
  font-weight: 600;
}

/* ------------------------------------------------------------ shots */

figure {
  margin: 0;
}

.shot {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  background: var(--surface);
}

.shot--hero {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  border-radius: 1.25rem;
}

figcaption {
  color: var(--ink-muted);
  font-size: 0.875rem;
  margin-top: 0.875rem;
}

/* ---------------------------------------------------------- features */

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  margin-top: 2.75rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.5rem;
}

.card h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--ink-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.card .icon {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.625rem;
  background: var(--surface-muted);
  margin-bottom: 1rem;
}

/* Four cards read better as a square than as three-and-one. */
.grid--pairs {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
}

.card .icon svg {
  width: 1.125rem;
  height: 1.125rem;
  stroke: var(--brass);
  fill: none;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* --------------------------------------------------------- split rows */

.row {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .row {
    grid-template-columns: 5fr 7fr;
  }
  .row--flip .row__text {
    order: 2;
  }
}

.row + .row {
  margin-top: clamp(3rem, 7vw, 5rem);
}

.row h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.375rem);
}

.row p {
  color: var(--ink-muted);
  margin-top: 1rem;
}

.row ul {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.625rem;
}

.row li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--ink-muted);
  font-size: 0.9375rem;
}

.row li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--brass);
}

/* ------------------------------------------------------------ mobile */

.phones {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 240px));
  gap: 1.5rem;
  justify-content: start;
}

.phones img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  box-shadow: var(--shadow);
}

/* ------------------------------------------------------------- setup */

.setup {
  background: var(--surface);
  border-block: 1px solid var(--line);
}

pre {
  margin: 2rem 0 0;
  padding: 1.5rem;
  background: var(--canvas);
  border: 1px solid var(--line);
  border-radius: 1rem;
  overflow-x: auto;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--ink);
}

pre .c {
  color: var(--ink-muted);
}

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

footer {
  border-top: 1px solid var(--line);
  padding-block: 3rem;
  color: var(--ink-muted);
  font-size: 0.9375rem;
}

footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
}

footer a {
  text-decoration-color: var(--line);
  text-underline-offset: 0.25em;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}

/* --------------------------------------------------------- language */

.langbar {
  position: absolute;
  top: 1.25rem;
  right: 0;
  display: flex;
  gap: 0.25rem;
  align-items: center;
  font-size: 0.8125rem;
  font-weight: 600;
}

.langbar a,
.langbar span {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding-inline: 0.75rem;
  border-radius: 999px;
  text-decoration: none;
}

.langbar span[aria-current] {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
}

.langbar a {
  color: var(--ink-muted);
  border: 1px solid transparent;
}

.langbar a:hover {
  color: var(--ink);
  background: var(--surface-muted);
}