/* ==========================================================================
   Components · header, navigation, menu, buttons, links, media, footer,
   mobile action bar, wipe bar, forms
   ========================================================================== */

/* — Buttons: one shape, two heights, three styles, one highlight rule — */
.btn {
  --btn-bg: transparent;
  --btn-fg: currentColor;
  --btn-border: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 3rem;
  padding: 0 1.5rem;
  border: 1px solid var(--btn-border);
  border-radius: var(--r-sm);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  line-height: 1.1;
  white-space: nowrap;
  text-align: center;
  transition:
    background-color var(--dur-base) var(--ease-standard),
    color var(--dur-base) var(--ease-standard),
    border-color var(--dur-base) var(--ease-standard),
    transform var(--dur-base) var(--ease-out);
}

/* Highlight (--btn-*-hi): shown on hover where a pointer can hover, and while
   pressed everywhere, so a tap on a touch screen gets the same answer. */
@media (hover: hover) {
  .btn:hover {
    border-color: var(--btn-border-hi, var(--btn-border));
    background: var(--btn-bg-hi, var(--btn-bg));
  }
}

.btn:active {
  border-color: var(--btn-border-hi, var(--btn-border));
  background: var(--btn-bg-hi, var(--btn-bg));
  transform: scale(0.97);
  transition-duration: var(--dur-press);
}

.btn--sm {
  min-height: 2.75rem;
  padding: 0 1.125rem;
  font-size: 0.9375rem;
}

.btn--mint {
  --btn-bg: var(--c-mint);
  --btn-fg: var(--c-black);
  --btn-bg-hi: #72f9c8;
}

.btn--black {
  --btn-bg: var(--c-black);
  --btn-fg: var(--c-chalk);
  --btn-bg-hi: #2d312d;
}

/* Outline: takes its colour from the surface it sits on. */
.btn--ghost {
  --btn-border: color-mix(in srgb, currentColor 40%, transparent);
  --btn-border-hi: currentColor;
}

/* Drawn, not typed: iOS renders the "↗" glyph as a colour emoji. */
.btn__arrow {
  display: inline-block;
  flex: none;
  width: 0.8em;
  height: 0.8em;
  background-color: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='square'%3E%3Cpath d='M4 12h16M13 5l7 7-7 7'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='square'%3E%3Cpath d='M4 12h16M13 5l7 7-7 7'/%3E%3C/svg%3E") center / contain no-repeat;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* — Text links — */
.link-arrow {
  display: inline-flex;
  /* As a grid or flex-column child it would stretch, and so would its underline. */
  justify-self: start;
  align-self: flex-start;
  align-items: baseline;
  gap: 0.35em;
  padding-bottom: 0.45em;
  border-bottom: 1.5px solid currentColor;
  font-weight: var(--fw-semibold);
  line-height: 1.2;
}

@media (hover: hover) {
  .link-arrow:hover {
    color: var(--c-mint);
  }

  .on-light .link-arrow:hover,
  .on-mint .link-arrow:hover,
  .on-lavender .link-arrow:hover,
  .stack-card .link-arrow:hover {
    color: inherit;
    border-bottom-width: 3px;
    padding-bottom: calc(0.45em - 1.5px);
  }
}

/* Fingers get a 44px target; padding would move the underline, so a
   transparent layer carries the extra area instead. */
@media (pointer: coarse) {
  .link-arrow {
    position: relative;
  }

  .link-arrow::before {
    content: "";
    position: absolute;
    inset: -0.6875rem -0.5rem;
  }
}

/* — Site header: one solid bar; it leaves on the way down and returns on the way up — */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-header);
  height: var(--header-h);
  border-bottom: 1px solid var(--c-black-line);
  background: var(--c-black);
  color: var(--c-chalk);
  transition: transform 320ms var(--ease-out);
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
}

/* Helmine stands on the header's bottom edge, the logo sits centred next to her.
   The link fills the bar's height, which also gives touch users a full tap target. */
.site-header__logo {
  display: flex;
  align-items: center;
  gap: clamp(0.375rem, 0.25rem + 0.4vw, 0.75rem);
  flex: none;
  align-self: stretch;
  border-radius: var(--r-xs);
}

.site-header__helmine {
  flex: none;
  align-self: flex-end;
  width: auto;
  height: calc(var(--header-h) - 0.75rem);
}

.site-header__wordmark {
  flex: none;
  width: clamp(7.5rem, 1.5rem + 30vw, 9.5rem);
  height: auto;
}

.site-nav {
  display: none;
}

.site-nav ul {
  display: flex;
  gap: clamp(1.25rem, 0.4rem + 1.4vw, 1.75rem);
}

.site-nav a {
  position: relative;
  display: inline-block;
  padding-block: var(--sp-2);
  font-size: 0.9375rem;
  font-weight: var(--fw-medium);
  color: var(--c-ink-on-dark-soft);
  transition: color var(--dur-base) var(--ease-standard);
}

.site-nav a[aria-current="page"] {
  color: var(--c-chalk);
}

@media (hover: hover) {
  .site-nav a:hover {
    color: var(--c-chalk);
  }
}

.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.15rem;
  height: 2px;
  background: var(--c-mint);
}

/* Tablets in landscape get the desktop nav: keep it tappable ("Team" is short). */
@media (pointer: coarse) {
  .site-nav a {
    padding: var(--sp-3) var(--sp-1);
    margin-inline: calc(-1 * var(--sp-1));
  }

  .site-nav a[aria-current="page"]::after {
    left: var(--sp-1);
    right: var(--sp-1);
    bottom: 0.4rem;
  }
}

.site-header__cta,
.site-header__phone {
  display: none;
}

.site-header__phone {
  margin-right: var(--sp-4);
  font-size: 0.9375rem;
  font-weight: var(--fw-medium);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur-base) var(--ease-standard);
}

@media (hover: hover) {
  .site-header__phone:hover {
    color: var(--c-mint);
  }
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.site-header__call {
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--c-black-line-strong);
  border-radius: var(--r-sm);
  transition: border-color var(--dur-base);
}

@media (hover: hover) {
  .site-header__call:hover {
    border-color: var(--c-chalk);
  }
}

.site-header__call svg {
  width: 1.125rem;
  height: 1.125rem;
}

/* Hamburger */
.menu-toggle {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--c-black-line-strong);
  border-radius: var(--r-sm);
  color: var(--c-chalk);
}

.menu-toggle__bars,
.menu-toggle__bars::before {
  display: block;
  width: 1.125rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease-out);
}

.menu-toggle__bars {
  position: relative;
  transform: translateY(-3px);
}

.menu-toggle__bars::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bars {
  transform: translateY(0) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bars::before {
  transform: translateY(-6px) rotate(-90deg);
}

/* Without JS the toggle cannot work: show the plain nav instead. */
html:not(.js) .menu-toggle {
  display: none;
}

html:not(.js) .site-header {
  position: absolute;
  height: auto;
  padding-block: var(--sp-3);
}

html:not(.js) .site-header__inner {
  flex-wrap: wrap;
  row-gap: var(--sp-2);
}

html:not(.js) .site-nav {
  display: block;
  width: 100%;
  overflow-x: auto;
}

@media (min-width: 64em) {
  .site-nav {
    display: block;
  }

  .site-header__cta {
    display: inline-flex;
  }

  .site-header__call,
  .menu-toggle {
    display: none;
  }

  html:not(.js) .site-header {
    height: var(--header-h);
    padding-block: 0;
  }

  html:not(.js) .site-nav {
    width: auto;
  }

  .site-header__wordmark {
    width: 11.5rem;
  }

  /* Logo in the label column, nav on the content axis, actions right. */
  .site-header__inner {
    display: grid;
    grid-template-columns: var(--label-col) minmax(0, 1fr) auto;
    gap: var(--col-gap);
  }

  .site-header__actions {
    justify-self: end;
  }
}

@media (min-width: 80em) {
  .site-header__phone {
    display: inline;
  }
}

/* — Mobile menu (full-screen panel, design 4a) — */
html.menu-open {
  overflow: hidden;
}

.menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  padding: calc(var(--header-h) + var(--sp-6)) var(--gutter) calc(var(--sp-6) + env(safe-area-inset-bottom));
  background: var(--c-black);
  color: var(--c-chalk);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateY(-101%);
  transition: transform 640ms var(--ease-in-out);
}

.menu[hidden] {
  display: none;
}

.menu.is-open {
  transform: none;
}

.menu__head {
  position: absolute;
  inset: 0 0 auto;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--gutter);
  border-bottom: var(--hairline);
}


.menu__list {
  display: flex;
  flex-direction: column;
  border-top: var(--hairline);
}

.menu__list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-block: 0.6rem;
  border-bottom: var(--hairline);
  font-size: clamp(2rem, 1.4rem + 3.2vw, 2.75rem);
  font-weight: var(--fw-medium);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.menu__list a[aria-current="page"] {
  color: var(--c-mint);
}

.menu__list li {
  transition:
    opacity 500ms var(--ease-out) var(--d, 0ms),
    transform 700ms var(--ease-out) var(--d, 0ms);
}

.menu:not(.is-open) .menu__list li {
  opacity: 0;
  transform: translateY(2.5rem);
}

.menu__foot {
  margin-top: auto;
  padding-top: var(--sp-7);
  display: grid;
  gap: var(--sp-5);
}

.menu__foot .btn {
  width: 100%;
}

.menu__contact {
  display: grid;
  gap: var(--sp-1);
  font-size: var(--fs-small);
  color: var(--c-ink-on-dark-soft);
}

.menu__contact a {
  color: var(--c-chalk);
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
}

@media (pointer: coarse) {
  .menu__contact {
    gap: 0;
  }

  .menu__contact a {
    display: flex;
    align-items: center;
    min-height: 2.75rem;
  }
}

@media (min-width: 64em) {
  .menu {
    display: none !important;
  }
}

/* — Media frames — */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-xs);
  background: var(--c-black-raised);
}

.on-light .media {
  background: var(--c-chalk-raised);
}

.media > picture,
.media > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  position: absolute;
  left: var(--sp-4);
  bottom: var(--sp-4);
  z-index: 1;
  padding: 0.35rem 0.7rem;
  border-radius: var(--r-sm);
  background: rgb(20 22 20 / 0.72);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--c-chalk);
  font-size: var(--fs-label);
}

/* Helmine crops always sit on a palette colour (Markenhandbuch B 17). */
.helmine-crop {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-xs);
  background: var(--c-lavender);
}

.helmine-crop::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--c-black) 0 1.6px, transparent 2px);
  background-size: 16px 16px;
  opacity: 0.12;
  -webkit-mask-image: linear-gradient(to right, #000, transparent 75%);
  mask-image: linear-gradient(to right, #000, transparent 75%);
}

.helmine-crop picture {
  display: block;
  width: 100%;
  height: 100%;
}

.helmine-crop img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* — Abzieher-Balken (wipe bar): used at most once per page — */
.wipe {
  position: relative;
  display: inline-block;
  isolation: isolate;
}

.wipe__bar {
  position: absolute;
  inset: 0.08em -0.08em 0.02em;
  z-index: -1;
  border-radius: 2px;
  background: var(--c-mint);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

.wipe--lavender .wipe__bar {
  background: var(--c-lavender);
}

.fx .wipe.is-in .wipe__bar {
  animation: wipe-bar 1100ms var(--ease-in-out) var(--d, 0ms) both;
}

.fx .wipe:not(.is-in) .wipe__txt {
  opacity: 0;
}

.fx .wipe.is-in .wipe__txt {
  animation: wipe-txt 1100ms linear var(--d, 0ms) both;
}

@keyframes wipe-bar {
  0% { transform: scaleX(0); transform-origin: 0 50%; }
  50% { transform: scaleX(1); transform-origin: 0 50%; }
  50.1% { transform: scaleX(1); transform-origin: 100% 50%; }
  100% { transform: scaleX(0); transform-origin: 100% 50%; }
}

@keyframes wipe-txt {
  0%, 50% { opacity: 0; }
  50.1%, 100% { opacity: 1; }
}

/* — Breadcrumb — */
.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
  list-style: none;
  padding: 0;
  font-size: var(--fs-label);
  color: var(--c-ink-on-dark-muted);
}

.crumbs li + li::before {
  content: "/";
  margin-right: 0.4em;
  opacity: 0.6;
}

@media (hover: hover) {
  .crumbs a:hover {
    color: var(--c-mint);
  }
}

@media (pointer: coarse) {
  .crumbs a {
    display: inline-block;
    padding-block: 0.8125rem;
    margin-block: -0.8125rem;
  }
}

/* — Site footer — */
.site-footer {
  padding-top: clamp(3.5rem, 2rem + 4.5vw, 6.5rem);
  overflow: hidden;
}

.site-footer__grid {
  display: grid;
  gap: var(--sp-7) var(--col-gap);
  padding-bottom: var(--sp-8);
}

.site-footer__brand {
  display: grid;
  align-content: start;
  gap: var(--sp-4);
}

.site-footer__claim {
  font-size: var(--fs-h3);
  font-weight: var(--fw-medium);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.site-footer h2 {
  margin-bottom: var(--sp-4);
  font-size: var(--fs-label);
  font-weight: var(--fw-regular);
  color: var(--c-ink-on-dark-muted);
}

.site-footer__links {
  display: grid;
  gap: var(--sp-2);
  font-size: var(--fs-small);
}

@media (hover: hover) {
  .site-footer__links a:hover,
  .site-footer__legal a:hover,
  .site-footer address a:hover {
    color: var(--c-mint);
  }
}

.site-footer address {
  display: grid;
  gap: var(--sp-4);
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--c-ink-on-dark-soft);
}

.site-footer address strong {
  display: block;
  color: var(--c-chalk);
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-3) var(--sp-6);
  padding-block: var(--sp-5);
  border-top: var(--hairline);
  font-size: var(--fs-label);
  color: var(--c-ink-on-dark-muted);
}

.site-footer__legal ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-5);
}

/* Footer links sit closer than a fingertip: give each its own 44px row. */
@media (pointer: coarse) {
  .site-footer__links {
    gap: 0;
  }

  .site-footer__links a {
    display: flex;
    align-items: center;
    min-height: 2.75rem;
  }

  .site-footer__legal a,
  .site-footer address a {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
  }
}

.site-footer__mark {
  container-type: inline-size;
  overflow: hidden;
  width: min(100% - 2 * var(--gutter), var(--container));
  margin-inline: auto;
}

/* Helmine stands on the bottom edge; the logo overlaps her elbow slightly and stays on top. */
/* Two classes so it outranks `.mask > span { display: block }` in base.css. */
.site-footer__mark > .site-footer__mark-inner {
  display: flex;
  align-items: flex-end;
}

.site-footer__helmine {
  flex: none;
  width: 28cqi;
}

.site-footer__helmine img {
  display: block;
  width: 100%;
  height: auto;
}

.site-footer__logo {
  position: relative;
  z-index: 1;
  flex: 1 1 auto;
  min-width: 0;
  height: auto;
  margin: 0 0 4cqi -2.5cqi;
}

@media (min-width: 40em) {
  .site-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64em) {
  .site-footer__grid {
    grid-template-columns: var(--label-col) repeat(3, minmax(0, 1fr));
  }

  .site-footer__brand {
    grid-column: 2 / -1;
  }

  .site-footer__grid > nav:first-of-type {
    grid-column: 2;
  }

}

/* — Mobile action bar (design 4a: call + offer stay within reach) — */
.action-bar {
  position: fixed;
  inset: auto 0 0;
  z-index: var(--z-actionbar);
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--gutter) calc(var(--sp-3) + env(safe-area-inset-bottom));
  border-top: var(--hairline);
  background: var(--c-black);
  transition: transform 520ms var(--ease-out);
}

.action-bar .btn {
  min-height: 3rem;
  padding-inline: var(--sp-3);
}

.js .action-bar:not(.is-visible) {
  transform: translateY(110%);
}

@media (max-width: 47.99em) {
  body {
    padding-bottom: calc(4.5rem + env(safe-area-inset-bottom));
  }
}

@media (min-width: 48em) {
  .action-bar {
    display: none;
  }
}

/* — Forms — */
.form {
  display: grid;
  gap: var(--sp-6);
}

.form__row {
  display: grid;
  gap: var(--sp-5);
}

@media (min-width: 40em) {
  .form__row--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.field {
  display: grid;
  gap: var(--sp-2);
}

.field__label,
.form legend {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
}

.field__hint {
  font-weight: var(--fw-regular);
  color: var(--c-ink-on-light-muted);
}

.field__input {
  width: 100%;
  min-height: 3.25rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgb(20 22 20 / 0.3);
  border-radius: var(--r-xs);
  background: #fff;
  color: var(--c-black);
  font-size: 1rem;
  line-height: 1.4;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}

@media (hover: hover) {
  .field__input:hover {
    border-color: rgb(20 22 20 / 0.55);
  }
}

.field__input:focus-visible {
  outline: none;
  border-color: var(--c-black);
  box-shadow: 0 0 0 3px rgb(62 247 179 / 0.9);
}

textarea.field__input {
  min-height: 9rem;
  resize: vertical;
}

.field__input--file {
  padding: 0.5rem;
  font-size: var(--fs-small);
  cursor: pointer;
}

.field__input--file::file-selector-button {
  margin-right: 0.85rem;
  padding: 0.6rem 1rem;
  border: 0;
  border-radius: var(--r-sm);
  background: var(--c-black);
  color: var(--c-chalk);
  font: inherit;
  font-weight: var(--fw-medium);
  cursor: pointer;
}

select.field__input {
  appearance: none;
  padding-right: 2.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%23141614' stroke-width='1.6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 0.75rem;
}

.field__input[aria-invalid="true"] {
  border-color: var(--c-error-on-light);
  box-shadow: 0 0 0 1px var(--c-error-on-light);
}

.field__error {
  font-size: var(--fs-small);
  color: var(--c-error-on-light);
  font-weight: var(--fw-semibold);
}

.field__error:empty {
  display: none;
}

.form fieldset {
  border: 0;
  padding: 0;
  min-width: 0;
}

.form legend {
  margin-bottom: var(--sp-3);
  padding: 0;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.chip {
  position: relative;
}

.chip input {
  position: absolute;
  opacity: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}

.chip span {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  min-height: 2.75rem;
  padding: 0.6rem 1rem;
  border: 1px solid rgb(20 22 20 / 0.3);
  border-radius: var(--r-sm);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  transition: background-color var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast);
}

.chip span::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  transition: background-color var(--dur-fast);
}

@media (hover: hover) {
  .chip input:hover + span {
    border-color: var(--c-black);
  }
}

@media (hover: none) {
  .chip input:active + span {
    opacity: 0.6;
  }
}

.chip input:checked + span {
  background: var(--c-black);
  border-color: var(--c-black);
  color: var(--c-chalk);
}

.chip input:checked + span::before {
  background: var(--c-mint);
  border-color: var(--c-mint);
}

.chip input:focus-visible + span {
  outline: 2px solid var(--c-black);
  outline-offset: 3px;
}

/* Spam trap: invisible to people, tempting for bots. */
.hp {
  position: absolute !important;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form__status {
  padding: var(--sp-5);
  border-radius: var(--r-xs);
  font-weight: var(--fw-medium);
}

.form__status[hidden] {
  display: none;
}

.form__status--ok {
  background: var(--c-mint);
  color: var(--c-black);
}

.form__status--error {
  background: var(--c-black);
  color: var(--c-chalk);
}

.form__status--error a {
  color: var(--c-mint);
  text-decoration: underline;
}

.form__status h2,
.form__status h3 {
  margin-bottom: var(--sp-2);
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
}

.form [type="submit"][aria-busy="true"] {
  opacity: 0.7;
  cursor: progress;
}

/* No-JS fallback: the server redirects to #anfrage-fehler on failure. */
.form-fallback {
  display: none;
}

.form-fallback:target {
  display: block;
}