.form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.form__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: flex-end;
}

.form__row > label {
  flex: 1;
  min-width: 8rem;
}

.form label,
.toolbar label {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.form__sets {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  background: var(--color-surface-alt);
}

.form__sets legend {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding: 0 var(--spacing-sm);
}

.form__set-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form__set-label {
  width: 3.25rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  font-weight: 500;
}

.form__sets input {
  width: 4rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

input,
select {
  padding: 0 var(--spacing-sm);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  /* Below 16px, mobile Chrome zooms the viewport when a field takes focus. */
  font-size: 16px;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  min-height: 44px;
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

input::placeholder {
  color: var(--grey-400);
}

input:hover,
select:hover {
  border-color: var(--grey-400);
}

input:focus,
select:focus {
  border-color: var(--color-primary);
  box-shadow: var(--ring);
  outline: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  align-self: flex-start;
  min-height: 44px;
  padding: 0 var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-on-primary, #fff);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 550;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition);
}

.btn:hover {
  background-color: var(--color-primary-dark);
}

.btn:active {
  transform: translateY(1px);
}

.btn--small {
  min-height: 34px;
  padding: 0 0.625rem;
  font-size: var(--font-size-xs);
}

.btn--ghost {
  background: var(--color-surface);
  color: var(--color-text-soft);
  border-color: var(--color-border-strong);
}

.btn--ghost:hover {
  background: var(--color-surface-alt);
  border-color: var(--grey-400);
  color: var(--color-text);
}

/* For use on the near-black header bar. It lives here, with the other .btn
   modifiers, because a modifier defined in another sheet loses to plain `.btn`
   on source order and silently renders black-on-black. */
.btn--invert {
  background-color: #fff;
  border-color: #fff;
  color: var(--grey-900);
}

.btn--invert:hover {
  background-color: var(--grey-200);
  border-color: var(--grey-200);
}

/* The chosen profile picture, shown beside its remove button. */
.picture-preview {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.picture-preview img {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--color-border);
}

/* The submit confirmation: the result is read back with the winner and the
   scoreline emphasised, and nothing is sent until it is confirmed. */
.form-confirm {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  background: var(--color-surface-alt);
}

.form-confirm p {
  margin: 0 0 var(--spacing-sm);
}

.form-confirm__actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* The page-level error banner, above the view. */
.error {
  max-width: 72rem;
  margin: var(--spacing-md) auto 0;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-danger-border);
  border-radius: var(--radius);
  background: var(--color-danger-bg);
  color: var(--color-danger);
  font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
  /* Forms go single-column, but the two games in a set stay side by side — they
     are a pair, and splitting them reads wrong. */
  .form__row {
    flex-direction: column;
    align-items: stretch;
  }

  .form__set-row {
    flex-direction: row;
  }

  .btn {
    align-self: stretch;
  }

  .btn--small {
    align-self: auto;
  }

  .error {
    margin: var(--spacing-sm) var(--spacing-md) 0;
  }
}